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Commit | Line | Data |
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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 | ||
9 | #include <linux/namei.h> | |
10 | #include <linux/ctype.h> | |
11 | ||
12 | #include <linux/nfsd_idmap.h> | |
13 | #include <linux/sunrpc/svcsock.h> | |
14 | #include <linux/nfsd/syscall.h> | |
15 | #include <linux/lockd/lockd.h> | |
16 | #include <linux/sunrpc/clnt.h> | |
17 | ||
18 | #include "nfsd.h" | |
19 | #include "cache.h" | |
20 | ||
21 | /* | |
22 | * We have a single directory with 9 nodes in it. | |
23 | */ | |
24 | enum { | |
25 | NFSD_Root = 1, | |
26 | NFSD_Svc, | |
27 | NFSD_Add, | |
28 | NFSD_Del, | |
29 | NFSD_Export, | |
30 | NFSD_Unexport, | |
31 | NFSD_Getfd, | |
32 | NFSD_Getfs, | |
33 | NFSD_List, | |
34 | NFSD_Fh, | |
35 | NFSD_FO_UnlockIP, | |
36 | NFSD_FO_UnlockFS, | |
37 | NFSD_Threads, | |
38 | NFSD_Pool_Threads, | |
39 | NFSD_Pool_Stats, | |
40 | NFSD_Versions, | |
41 | NFSD_Ports, | |
42 | NFSD_MaxBlkSize, | |
43 | /* | |
44 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
45 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
46 | */ | |
47 | #ifdef CONFIG_NFSD_V4 | |
48 | NFSD_Leasetime, | |
49 | NFSD_RecoveryDir, | |
50 | #endif | |
51 | }; | |
52 | ||
53 | /* | |
54 | * write() for these nodes. | |
55 | */ | |
56 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
57 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
58 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
59 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
60 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
61 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
62 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
63 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
64 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); | |
65 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
66 | static ssize_t write_threads(struct file *file, char *buf, size_t size); | |
67 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); | |
68 | static ssize_t write_versions(struct file *file, char *buf, size_t size); | |
69 | static ssize_t write_ports(struct file *file, char *buf, size_t size); | |
70 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); | |
71 | #ifdef CONFIG_NFSD_V4 | |
72 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); | |
73 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); | |
74 | #endif | |
75 | ||
76 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
77 | [NFSD_Svc] = write_svc, | |
78 | [NFSD_Add] = write_add, | |
79 | [NFSD_Del] = write_del, | |
80 | [NFSD_Export] = write_export, | |
81 | [NFSD_Unexport] = write_unexport, | |
82 | [NFSD_Getfd] = write_getfd, | |
83 | [NFSD_Getfs] = write_getfs, | |
84 | [NFSD_Fh] = write_filehandle, | |
85 | [NFSD_FO_UnlockIP] = write_unlock_ip, | |
86 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
87 | [NFSD_Threads] = write_threads, | |
88 | [NFSD_Pool_Threads] = write_pool_threads, | |
89 | [NFSD_Versions] = write_versions, | |
90 | [NFSD_Ports] = write_ports, | |
91 | [NFSD_MaxBlkSize] = write_maxblksize, | |
92 | #ifdef CONFIG_NFSD_V4 | |
93 | [NFSD_Leasetime] = write_leasetime, | |
94 | [NFSD_RecoveryDir] = write_recoverydir, | |
95 | #endif | |
96 | }; | |
97 | ||
98 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
99 | { | |
100 | ino_t ino = file->f_path.dentry->d_inode->i_ino; | |
101 | char *data; | |
102 | ssize_t rv; | |
103 | ||
104 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) | |
105 | return -EINVAL; | |
106 | ||
107 | data = simple_transaction_get(file, buf, size); | |
108 | if (IS_ERR(data)) | |
109 | return PTR_ERR(data); | |
110 | ||
111 | rv = write_op[ino](file, data, size); | |
112 | if (rv >= 0) { | |
113 | simple_transaction_set(file, rv); | |
114 | rv = size; | |
115 | } | |
116 | return rv; | |
117 | } | |
118 | ||
119 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) | |
120 | { | |
121 | if (! file->private_data) { | |
122 | /* An attempt to read a transaction file without writing | |
123 | * causes a 0-byte write so that the file can return | |
124 | * state information | |
125 | */ | |
126 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
127 | if (rv < 0) | |
128 | return rv; | |
129 | } | |
130 | return simple_transaction_read(file, buf, size, pos); | |
131 | } | |
132 | ||
133 | static const struct file_operations transaction_ops = { | |
134 | .write = nfsctl_transaction_write, | |
135 | .read = nfsctl_transaction_read, | |
136 | .release = simple_transaction_release, | |
137 | }; | |
138 | ||
139 | static int exports_open(struct inode *inode, struct file *file) | |
140 | { | |
141 | return seq_open(file, &nfs_exports_op); | |
142 | } | |
143 | ||
144 | static const struct file_operations exports_operations = { | |
145 | .open = exports_open, | |
146 | .read = seq_read, | |
147 | .llseek = seq_lseek, | |
148 | .release = seq_release, | |
149 | .owner = THIS_MODULE, | |
150 | }; | |
151 | ||
152 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); | |
153 | extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); | |
154 | ||
155 | static const struct file_operations pool_stats_operations = { | |
156 | .open = nfsd_pool_stats_open, | |
157 | .read = seq_read, | |
158 | .llseek = seq_lseek, | |
159 | .release = nfsd_pool_stats_release, | |
160 | .owner = THIS_MODULE, | |
161 | }; | |
162 | ||
163 | /*----------------------------------------------------------------------------*/ | |
164 | /* | |
165 | * payload - write methods | |
166 | */ | |
167 | ||
168 | /** | |
169 | * write_svc - Start kernel's NFSD server | |
170 | * | |
171 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
172 | * Function remains to support old versions of nfs-utils. | |
173 | * | |
174 | * Input: | |
175 | * buf: struct nfsctl_svc | |
176 | * svc_port: port number of this | |
177 | * server's listener | |
178 | * svc_nthreads: number of threads to start | |
179 | * size: size in bytes of passed in nfsctl_svc | |
180 | * Output: | |
181 | * On success: returns zero | |
182 | * On error: return code is negative errno value | |
183 | */ | |
184 | static ssize_t write_svc(struct file *file, char *buf, size_t size) | |
185 | { | |
186 | struct nfsctl_svc *data; | |
187 | int err; | |
188 | if (size < sizeof(*data)) | |
189 | return -EINVAL; | |
190 | data = (struct nfsctl_svc*) buf; | |
191 | err = nfsd_svc(data->svc_port, data->svc_nthreads); | |
192 | if (err < 0) | |
193 | return err; | |
194 | return 0; | |
195 | } | |
196 | ||
197 | /** | |
198 | * write_add - Add or modify client entry in auth unix cache | |
199 | * | |
200 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
201 | * Function remains to support old versions of nfs-utils. | |
202 | * | |
203 | * Input: | |
204 | * buf: struct nfsctl_client | |
205 | * cl_ident: '\0'-terminated C string | |
206 | * containing domain name | |
207 | * of client | |
208 | * cl_naddr: no. of items in cl_addrlist | |
209 | * cl_addrlist: array of client addresses | |
210 | * cl_fhkeytype: ignored | |
211 | * cl_fhkeylen: ignored | |
212 | * cl_fhkey: ignored | |
213 | * size: size in bytes of passed in nfsctl_client | |
214 | * Output: | |
215 | * On success: returns zero | |
216 | * On error: return code is negative errno value | |
217 | * | |
218 | * Note: Only AF_INET client addresses are passed in, since | |
219 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
220 | */ | |
221 | static ssize_t write_add(struct file *file, char *buf, size_t size) | |
222 | { | |
223 | struct nfsctl_client *data; | |
224 | if (size < sizeof(*data)) | |
225 | return -EINVAL; | |
226 | data = (struct nfsctl_client *)buf; | |
227 | return exp_addclient(data); | |
228 | } | |
229 | ||
230 | /** | |
231 | * write_del - Remove client from auth unix cache | |
232 | * | |
233 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
234 | * Function remains to support old versions of nfs-utils. | |
235 | * | |
236 | * Input: | |
237 | * buf: struct nfsctl_client | |
238 | * cl_ident: '\0'-terminated C string | |
239 | * containing domain name | |
240 | * of client | |
241 | * cl_naddr: ignored | |
242 | * cl_addrlist: ignored | |
243 | * cl_fhkeytype: ignored | |
244 | * cl_fhkeylen: ignored | |
245 | * cl_fhkey: ignored | |
246 | * size: size in bytes of passed in nfsctl_client | |
247 | * Output: | |
248 | * On success: returns zero | |
249 | * On error: return code is negative errno value | |
250 | * | |
251 | * Note: Only AF_INET client addresses are passed in, since | |
252 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
253 | */ | |
254 | static ssize_t write_del(struct file *file, char *buf, size_t size) | |
255 | { | |
256 | struct nfsctl_client *data; | |
257 | if (size < sizeof(*data)) | |
258 | return -EINVAL; | |
259 | data = (struct nfsctl_client *)buf; | |
260 | return exp_delclient(data); | |
261 | } | |
262 | ||
263 | /** | |
264 | * write_export - Export part or all of a local file system | |
265 | * | |
266 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
267 | * Function remains to support old versions of nfs-utils. | |
268 | * | |
269 | * Input: | |
270 | * buf: struct nfsctl_export | |
271 | * ex_client: '\0'-terminated C string | |
272 | * containing domain name | |
273 | * of client allowed to access | |
274 | * this export | |
275 | * ex_path: '\0'-terminated C string | |
276 | * containing pathname of | |
277 | * directory in local file system | |
278 | * ex_dev: fsid to use for this export | |
279 | * ex_ino: ignored | |
280 | * ex_flags: export flags for this export | |
281 | * ex_anon_uid: UID to use for anonymous | |
282 | * requests | |
283 | * ex_anon_gid: GID to use for anonymous | |
284 | * requests | |
285 | * size: size in bytes of passed in nfsctl_export | |
286 | * Output: | |
287 | * On success: returns zero | |
288 | * On error: return code is negative errno value | |
289 | */ | |
290 | static ssize_t write_export(struct file *file, char *buf, size_t size) | |
291 | { | |
292 | struct nfsctl_export *data; | |
293 | if (size < sizeof(*data)) | |
294 | return -EINVAL; | |
295 | data = (struct nfsctl_export*)buf; | |
296 | return exp_export(data); | |
297 | } | |
298 | ||
299 | /** | |
300 | * write_unexport - Unexport a previously exported file system | |
301 | * | |
302 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
303 | * Function remains to support old versions of nfs-utils. | |
304 | * | |
305 | * Input: | |
306 | * buf: struct nfsctl_export | |
307 | * ex_client: '\0'-terminated C string | |
308 | * containing domain name | |
309 | * of client no longer allowed | |
310 | * to access this export | |
311 | * ex_path: '\0'-terminated C string | |
312 | * containing pathname of | |
313 | * directory in local file system | |
314 | * ex_dev: ignored | |
315 | * ex_ino: ignored | |
316 | * ex_flags: ignored | |
317 | * ex_anon_uid: ignored | |
318 | * ex_anon_gid: ignored | |
319 | * size: size in bytes of passed in nfsctl_export | |
320 | * Output: | |
321 | * On success: returns zero | |
322 | * On error: return code is negative errno value | |
323 | */ | |
324 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) | |
325 | { | |
326 | struct nfsctl_export *data; | |
327 | ||
328 | if (size < sizeof(*data)) | |
329 | return -EINVAL; | |
330 | data = (struct nfsctl_export*)buf; | |
331 | return exp_unexport(data); | |
332 | } | |
333 | ||
334 | /** | |
335 | * write_getfs - Get a variable-length NFS file handle by path | |
336 | * | |
337 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
338 | * Function remains to support old versions of nfs-utils. | |
339 | * | |
340 | * Input: | |
341 | * buf: struct nfsctl_fsparm | |
342 | * gd_addr: socket address of client | |
343 | * gd_path: '\0'-terminated C string | |
344 | * containing pathname of | |
345 | * directory in local file system | |
346 | * gd_maxlen: maximum size of returned file | |
347 | * handle | |
348 | * size: size in bytes of passed in nfsctl_fsparm | |
349 | * Output: | |
350 | * On success: passed-in buffer filled with a knfsd_fh structure | |
351 | * (a variable-length raw NFS file handle); | |
352 | * return code is the size in bytes of the file handle | |
353 | * On error: return code is negative errno value | |
354 | * | |
355 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
356 | * is the same size as a struct sockaddr_in. | |
357 | */ | |
358 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) | |
359 | { | |
360 | struct nfsctl_fsparm *data; | |
361 | struct sockaddr_in *sin; | |
362 | struct auth_domain *clp; | |
363 | int err = 0; | |
364 | struct knfsd_fh *res; | |
365 | struct in6_addr in6; | |
366 | ||
367 | if (size < sizeof(*data)) | |
368 | return -EINVAL; | |
369 | data = (struct nfsctl_fsparm*)buf; | |
370 | err = -EPROTONOSUPPORT; | |
371 | if (data->gd_addr.sa_family != AF_INET) | |
372 | goto out; | |
373 | sin = (struct sockaddr_in *)&data->gd_addr; | |
374 | if (data->gd_maxlen > NFS3_FHSIZE) | |
375 | data->gd_maxlen = NFS3_FHSIZE; | |
376 | ||
377 | res = (struct knfsd_fh*)buf; | |
378 | ||
379 | exp_readlock(); | |
380 | ||
381 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
382 | ||
383 | clp = auth_unix_lookup(&in6); | |
384 | if (!clp) | |
385 | err = -EPERM; | |
386 | else { | |
387 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
388 | auth_domain_put(clp); | |
389 | } | |
390 | exp_readunlock(); | |
391 | if (err == 0) | |
392 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); | |
393 | out: | |
394 | return err; | |
395 | } | |
396 | ||
397 | /** | |
398 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
399 | * | |
400 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
401 | * Function remains to support old versions of nfs-utils. | |
402 | * | |
403 | * Input: | |
404 | * buf: struct nfsctl_fdparm | |
405 | * gd_addr: socket address of client | |
406 | * gd_path: '\0'-terminated C string | |
407 | * containing pathname of | |
408 | * directory in local file system | |
409 | * gd_version: fdparm structure version | |
410 | * size: size in bytes of passed in nfsctl_fdparm | |
411 | * Output: | |
412 | * On success: passed-in buffer filled with nfsctl_res | |
413 | * (a fixed-length raw NFS file handle); | |
414 | * return code is the size in bytes of the file handle | |
415 | * On error: return code is negative errno value | |
416 | * | |
417 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
418 | * is the same size as a struct sockaddr_in. | |
419 | */ | |
420 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) | |
421 | { | |
422 | struct nfsctl_fdparm *data; | |
423 | struct sockaddr_in *sin; | |
424 | struct auth_domain *clp; | |
425 | int err = 0; | |
426 | struct knfsd_fh fh; | |
427 | char *res; | |
428 | struct in6_addr in6; | |
429 | ||
430 | if (size < sizeof(*data)) | |
431 | return -EINVAL; | |
432 | data = (struct nfsctl_fdparm*)buf; | |
433 | err = -EPROTONOSUPPORT; | |
434 | if (data->gd_addr.sa_family != AF_INET) | |
435 | goto out; | |
436 | err = -EINVAL; | |
437 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
438 | goto out; | |
439 | ||
440 | res = buf; | |
441 | sin = (struct sockaddr_in *)&data->gd_addr; | |
442 | exp_readlock(); | |
443 | ||
444 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
445 | ||
446 | clp = auth_unix_lookup(&in6); | |
447 | if (!clp) | |
448 | err = -EPERM; | |
449 | else { | |
450 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
451 | auth_domain_put(clp); | |
452 | } | |
453 | exp_readunlock(); | |
454 | ||
455 | if (err == 0) { | |
456 | memset(res,0, NFS_FHSIZE); | |
457 | memcpy(res, &fh.fh_base, fh.fh_size); | |
458 | err = NFS_FHSIZE; | |
459 | } | |
460 | out: | |
461 | return err; | |
462 | } | |
463 | ||
464 | /** | |
465 | * write_unlock_ip - Release all locks used by a client | |
466 | * | |
467 | * Experimental. | |
468 | * | |
469 | * Input: | |
470 | * buf: '\n'-terminated C string containing a | |
471 | * presentation format IP address | |
472 | * size: length of C string in @buf | |
473 | * Output: | |
474 | * On success: returns zero if all specified locks were released; | |
475 | * returns one if one or more locks were not released | |
476 | * On error: return code is negative errno value | |
477 | */ | |
478 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) | |
479 | { | |
480 | struct sockaddr_storage address; | |
481 | struct sockaddr *sap = (struct sockaddr *)&address; | |
482 | size_t salen = sizeof(address); | |
483 | char *fo_path; | |
484 | ||
485 | /* sanity check */ | |
486 | if (size == 0) | |
487 | return -EINVAL; | |
488 | ||
489 | if (buf[size-1] != '\n') | |
490 | return -EINVAL; | |
491 | ||
492 | fo_path = buf; | |
493 | if (qword_get(&buf, fo_path, size) < 0) | |
494 | return -EINVAL; | |
495 | ||
496 | if (rpc_pton(fo_path, size, sap, salen) == 0) | |
497 | return -EINVAL; | |
498 | ||
499 | return nlmsvc_unlock_all_by_ip(sap); | |
500 | } | |
501 | ||
502 | /** | |
503 | * write_unlock_fs - Release all locks on a local file system | |
504 | * | |
505 | * Experimental. | |
506 | * | |
507 | * Input: | |
508 | * buf: '\n'-terminated C string containing the | |
509 | * absolute pathname of a local file system | |
510 | * size: length of C string in @buf | |
511 | * Output: | |
512 | * On success: returns zero if all specified locks were released; | |
513 | * returns one if one or more locks were not released | |
514 | * On error: return code is negative errno value | |
515 | */ | |
516 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) | |
517 | { | |
518 | struct path path; | |
519 | char *fo_path; | |
520 | int error; | |
521 | ||
522 | /* sanity check */ | |
523 | if (size == 0) | |
524 | return -EINVAL; | |
525 | ||
526 | if (buf[size-1] != '\n') | |
527 | return -EINVAL; | |
528 | ||
529 | fo_path = buf; | |
530 | if (qword_get(&buf, fo_path, size) < 0) | |
531 | return -EINVAL; | |
532 | ||
533 | error = kern_path(fo_path, 0, &path); | |
534 | if (error) | |
535 | return error; | |
536 | ||
537 | /* | |
538 | * XXX: Needs better sanity checking. Otherwise we could end up | |
539 | * releasing locks on the wrong file system. | |
540 | * | |
541 | * For example: | |
542 | * 1. Does the path refer to a directory? | |
543 | * 2. Is that directory a mount point, or | |
544 | * 3. Is that directory the root of an exported file system? | |
545 | */ | |
546 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); | |
547 | ||
548 | path_put(&path); | |
549 | return error; | |
550 | } | |
551 | ||
552 | /** | |
553 | * write_filehandle - Get a variable-length NFS file handle by path | |
554 | * | |
555 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
556 | * three alphanumeric words separated by whitespace. The string may | |
557 | * contain escape sequences. | |
558 | * | |
559 | * Input: | |
560 | * buf: | |
561 | * domain: client domain name | |
562 | * path: export pathname | |
563 | * maxsize: numeric maximum size of | |
564 | * @buf | |
565 | * size: length of C string in @buf | |
566 | * Output: | |
567 | * On success: passed-in buffer filled with '\n'-terminated C | |
568 | * string containing a ASCII hex text version | |
569 | * of the NFS file handle; | |
570 | * return code is the size in bytes of the string | |
571 | * On error: return code is negative errno value | |
572 | */ | |
573 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) | |
574 | { | |
575 | char *dname, *path; | |
576 | int uninitialized_var(maxsize); | |
577 | char *mesg = buf; | |
578 | int len; | |
579 | struct auth_domain *dom; | |
580 | struct knfsd_fh fh; | |
581 | ||
582 | if (size == 0) | |
583 | return -EINVAL; | |
584 | ||
585 | if (buf[size-1] != '\n') | |
586 | return -EINVAL; | |
587 | buf[size-1] = 0; | |
588 | ||
589 | dname = mesg; | |
590 | len = qword_get(&mesg, dname, size); | |
591 | if (len <= 0) | |
592 | return -EINVAL; | |
593 | ||
594 | path = dname+len+1; | |
595 | len = qword_get(&mesg, path, size); | |
596 | if (len <= 0) | |
597 | return -EINVAL; | |
598 | ||
599 | len = get_int(&mesg, &maxsize); | |
600 | if (len) | |
601 | return len; | |
602 | ||
603 | if (maxsize < NFS_FHSIZE) | |
604 | return -EINVAL; | |
605 | if (maxsize > NFS3_FHSIZE) | |
606 | maxsize = NFS3_FHSIZE; | |
607 | ||
608 | if (qword_get(&mesg, mesg, size)>0) | |
609 | return -EINVAL; | |
610 | ||
611 | /* we have all the words, they are in buf.. */ | |
612 | dom = unix_domain_find(dname); | |
613 | if (!dom) | |
614 | return -ENOMEM; | |
615 | ||
616 | len = exp_rootfh(dom, path, &fh, maxsize); | |
617 | auth_domain_put(dom); | |
618 | if (len) | |
619 | return len; | |
620 | ||
621 | mesg = buf; | |
622 | len = SIMPLE_TRANSACTION_LIMIT; | |
623 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); | |
624 | mesg[-1] = '\n'; | |
625 | return mesg - buf; | |
626 | } | |
627 | ||
628 | /** | |
629 | * write_threads - Start NFSD, or report the current number of running threads | |
630 | * | |
631 | * Input: | |
632 | * buf: ignored | |
633 | * size: zero | |
634 | * Output: | |
635 | * On success: passed-in buffer filled with '\n'-terminated C | |
636 | * string numeric value representing the number of | |
637 | * running NFSD threads; | |
638 | * return code is the size in bytes of the string | |
639 | * On error: return code is zero | |
640 | * | |
641 | * OR | |
642 | * | |
643 | * Input: | |
644 | * buf: C string containing an unsigned | |
645 | * integer value representing the | |
646 | * number of NFSD threads to start | |
647 | * size: non-zero length of C string in @buf | |
648 | * Output: | |
649 | * On success: NFS service is started; | |
650 | * passed-in buffer filled with '\n'-terminated C | |
651 | * string numeric value representing the number of | |
652 | * running NFSD threads; | |
653 | * return code is the size in bytes of the string | |
654 | * On error: return code is zero or a negative errno value | |
655 | */ | |
656 | static ssize_t write_threads(struct file *file, char *buf, size_t size) | |
657 | { | |
658 | char *mesg = buf; | |
659 | int rv; | |
660 | if (size > 0) { | |
661 | int newthreads; | |
662 | rv = get_int(&mesg, &newthreads); | |
663 | if (rv) | |
664 | return rv; | |
665 | if (newthreads < 0) | |
666 | return -EINVAL; | |
667 | rv = nfsd_svc(NFS_PORT, newthreads); | |
668 | if (rv < 0) | |
669 | return rv; | |
670 | } else | |
671 | rv = nfsd_nrthreads(); | |
672 | ||
673 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); | |
674 | } | |
675 | ||
676 | /** | |
677 | * write_pool_threads - Set or report the current number of threads per pool | |
678 | * | |
679 | * Input: | |
680 | * buf: ignored | |
681 | * size: zero | |
682 | * | |
683 | * OR | |
684 | * | |
685 | * Input: | |
686 | * buf: C string containing whitespace- | |
687 | * separated unsigned integer values | |
688 | * representing the number of NFSD | |
689 | * threads to start in each pool | |
690 | * size: non-zero length of C string in @buf | |
691 | * Output: | |
692 | * On success: passed-in buffer filled with '\n'-terminated C | |
693 | * string containing integer values representing the | |
694 | * number of NFSD threads in each pool; | |
695 | * return code is the size in bytes of the string | |
696 | * On error: return code is zero or a negative errno value | |
697 | */ | |
698 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) | |
699 | { | |
700 | /* if size > 0, look for an array of number of threads per node | |
701 | * and apply them then write out number of threads per node as reply | |
702 | */ | |
703 | char *mesg = buf; | |
704 | int i; | |
705 | int rv; | |
706 | int len; | |
707 | int npools; | |
708 | int *nthreads; | |
709 | ||
710 | mutex_lock(&nfsd_mutex); | |
711 | npools = nfsd_nrpools(); | |
712 | if (npools == 0) { | |
713 | /* | |
714 | * NFS is shut down. The admin can start it by | |
715 | * writing to the threads file but NOT the pool_threads | |
716 | * file, sorry. Report zero threads. | |
717 | */ | |
718 | mutex_unlock(&nfsd_mutex); | |
719 | strcpy(buf, "0\n"); | |
720 | return strlen(buf); | |
721 | } | |
722 | ||
723 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
724 | rv = -ENOMEM; | |
725 | if (nthreads == NULL) | |
726 | goto out_free; | |
727 | ||
728 | if (size > 0) { | |
729 | for (i = 0; i < npools; i++) { | |
730 | rv = get_int(&mesg, &nthreads[i]); | |
731 | if (rv == -ENOENT) | |
732 | break; /* fewer numbers than pools */ | |
733 | if (rv) | |
734 | goto out_free; /* syntax error */ | |
735 | rv = -EINVAL; | |
736 | if (nthreads[i] < 0) | |
737 | goto out_free; | |
738 | } | |
739 | rv = nfsd_set_nrthreads(i, nthreads); | |
740 | if (rv) | |
741 | goto out_free; | |
742 | } | |
743 | ||
744 | rv = nfsd_get_nrthreads(npools, nthreads); | |
745 | if (rv) | |
746 | goto out_free; | |
747 | ||
748 | mesg = buf; | |
749 | size = SIMPLE_TRANSACTION_LIMIT; | |
750 | for (i = 0; i < npools && size > 0; i++) { | |
751 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
752 | len = strlen(mesg); | |
753 | size -= len; | |
754 | mesg += len; | |
755 | } | |
756 | rv = mesg - buf; | |
757 | out_free: | |
758 | kfree(nthreads); | |
759 | mutex_unlock(&nfsd_mutex); | |
760 | return rv; | |
761 | } | |
762 | ||
763 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) | |
764 | { | |
765 | char *mesg = buf; | |
766 | char *vers, *minorp, sign; | |
767 | int len, num, remaining; | |
768 | unsigned minor; | |
769 | ssize_t tlen = 0; | |
770 | char *sep; | |
771 | ||
772 | if (size>0) { | |
773 | if (nfsd_serv) | |
774 | /* Cannot change versions without updating | |
775 | * nfsd_serv->sv_xdrsize, and reallocing | |
776 | * rq_argp and rq_resp | |
777 | */ | |
778 | return -EBUSY; | |
779 | if (buf[size-1] != '\n') | |
780 | return -EINVAL; | |
781 | buf[size-1] = 0; | |
782 | ||
783 | vers = mesg; | |
784 | len = qword_get(&mesg, vers, size); | |
785 | if (len <= 0) return -EINVAL; | |
786 | do { | |
787 | sign = *vers; | |
788 | if (sign == '+' || sign == '-') | |
789 | num = simple_strtol((vers+1), &minorp, 0); | |
790 | else | |
791 | num = simple_strtol(vers, &minorp, 0); | |
792 | if (*minorp == '.') { | |
793 | if (num < 4) | |
794 | return -EINVAL; | |
795 | minor = simple_strtoul(minorp+1, NULL, 0); | |
796 | if (minor == 0) | |
797 | return -EINVAL; | |
798 | if (nfsd_minorversion(minor, sign == '-' ? | |
799 | NFSD_CLEAR : NFSD_SET) < 0) | |
800 | return -EINVAL; | |
801 | goto next; | |
802 | } | |
803 | switch(num) { | |
804 | case 2: | |
805 | case 3: | |
806 | case 4: | |
807 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); | |
808 | break; | |
809 | default: | |
810 | return -EINVAL; | |
811 | } | |
812 | next: | |
813 | vers += len + 1; | |
814 | } while ((len = qword_get(&mesg, vers, size)) > 0); | |
815 | /* If all get turned off, turn them back on, as | |
816 | * having no versions is BAD | |
817 | */ | |
818 | nfsd_reset_versions(); | |
819 | } | |
820 | ||
821 | /* Now write current state into reply buffer */ | |
822 | len = 0; | |
823 | sep = ""; | |
824 | remaining = SIMPLE_TRANSACTION_LIMIT; | |
825 | for (num=2 ; num <= 4 ; num++) | |
826 | if (nfsd_vers(num, NFSD_AVAIL)) { | |
827 | len = snprintf(buf, remaining, "%s%c%d", sep, | |
828 | nfsd_vers(num, NFSD_TEST)?'+':'-', | |
829 | num); | |
830 | sep = " "; | |
831 | ||
832 | if (len > remaining) | |
833 | break; | |
834 | remaining -= len; | |
835 | buf += len; | |
836 | tlen += len; | |
837 | } | |
838 | if (nfsd_vers(4, NFSD_AVAIL)) | |
839 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; | |
840 | minor++) { | |
841 | len = snprintf(buf, remaining, " %c4.%u", | |
842 | (nfsd_vers(4, NFSD_TEST) && | |
843 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
844 | '+' : '-', | |
845 | minor); | |
846 | ||
847 | if (len > remaining) | |
848 | break; | |
849 | remaining -= len; | |
850 | buf += len; | |
851 | tlen += len; | |
852 | } | |
853 | ||
854 | len = snprintf(buf, remaining, "\n"); | |
855 | if (len > remaining) | |
856 | return -EINVAL; | |
857 | return tlen + len; | |
858 | } | |
859 | ||
860 | /** | |
861 | * write_versions - Set or report the available NFS protocol versions | |
862 | * | |
863 | * Input: | |
864 | * buf: ignored | |
865 | * size: zero | |
866 | * Output: | |
867 | * On success: passed-in buffer filled with '\n'-terminated C | |
868 | * string containing positive or negative integer | |
869 | * values representing the current status of each | |
870 | * protocol version; | |
871 | * return code is the size in bytes of the string | |
872 | * On error: return code is zero or a negative errno value | |
873 | * | |
874 | * OR | |
875 | * | |
876 | * Input: | |
877 | * buf: C string containing whitespace- | |
878 | * separated positive or negative | |
879 | * integer values representing NFS | |
880 | * protocol versions to enable ("+n") | |
881 | * or disable ("-n") | |
882 | * size: non-zero length of C string in @buf | |
883 | * Output: | |
884 | * On success: status of zero or more protocol versions has | |
885 | * been updated; passed-in buffer filled with | |
886 | * '\n'-terminated C string containing positive | |
887 | * or negative integer values representing the | |
888 | * current status of each protocol version; | |
889 | * return code is the size in bytes of the string | |
890 | * On error: return code is zero or a negative errno value | |
891 | */ | |
892 | static ssize_t write_versions(struct file *file, char *buf, size_t size) | |
893 | { | |
894 | ssize_t rv; | |
895 | ||
896 | mutex_lock(&nfsd_mutex); | |
897 | rv = __write_versions(file, buf, size); | |
898 | mutex_unlock(&nfsd_mutex); | |
899 | return rv; | |
900 | } | |
901 | ||
902 | /* | |
903 | * Zero-length write. Return a list of NFSD's current listener | |
904 | * transports. | |
905 | */ | |
906 | static ssize_t __write_ports_names(char *buf) | |
907 | { | |
908 | if (nfsd_serv == NULL) | |
909 | return 0; | |
910 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); | |
911 | } | |
912 | ||
913 | /* | |
914 | * A single 'fd' number was written, in which case it must be for | |
915 | * a socket of a supported family/protocol, and we use it as an | |
916 | * nfsd listener. | |
917 | */ | |
918 | static ssize_t __write_ports_addfd(char *buf) | |
919 | { | |
920 | char *mesg = buf; | |
921 | int fd, err; | |
922 | ||
923 | err = get_int(&mesg, &fd); | |
924 | if (err != 0 || fd < 0) | |
925 | return -EINVAL; | |
926 | ||
927 | err = nfsd_create_serv(); | |
928 | if (err != 0) | |
929 | return err; | |
930 | ||
931 | err = lockd_up(); | |
932 | if (err != 0) | |
933 | goto out; | |
934 | ||
935 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); | |
936 | if (err < 0) | |
937 | lockd_down(); | |
938 | ||
939 | out: | |
940 | /* Decrease the count, but don't shut down the service */ | |
941 | nfsd_serv->sv_nrthreads--; | |
942 | return err; | |
943 | } | |
944 | ||
945 | /* | |
946 | * A '-' followed by the 'name' of a socket means we close the socket. | |
947 | */ | |
948 | static ssize_t __write_ports_delfd(char *buf) | |
949 | { | |
950 | char *toclose; | |
951 | int len = 0; | |
952 | ||
953 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
954 | if (toclose == NULL) | |
955 | return -ENOMEM; | |
956 | ||
957 | if (nfsd_serv != NULL) | |
958 | len = svc_sock_names(nfsd_serv, buf, | |
959 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
960 | if (len >= 0) | |
961 | lockd_down(); | |
962 | ||
963 | kfree(toclose); | |
964 | return len; | |
965 | } | |
966 | ||
967 | /* | |
968 | * A transport listener is added by writing it's transport name and | |
969 | * a port number. | |
970 | */ | |
971 | static ssize_t __write_ports_addxprt(char *buf) | |
972 | { | |
973 | char transport[16]; | |
974 | int port, err; | |
975 | ||
976 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
977 | return -EINVAL; | |
978 | ||
979 | if (port < 1 || port > USHORT_MAX) | |
980 | return -EINVAL; | |
981 | ||
982 | err = nfsd_create_serv(); | |
983 | if (err != 0) | |
984 | return err; | |
985 | ||
986 | err = svc_create_xprt(nfsd_serv, transport, | |
987 | PF_INET, port, SVC_SOCK_ANONYMOUS); | |
988 | if (err < 0) { | |
989 | /* Give a reasonable perror msg for bad transport string */ | |
990 | if (err == -ENOENT) | |
991 | err = -EPROTONOSUPPORT; | |
992 | return err; | |
993 | } | |
994 | return 0; | |
995 | } | |
996 | ||
997 | /* | |
998 | * A transport listener is removed by writing a "-", it's transport | |
999 | * name, and it's port number. | |
1000 | */ | |
1001 | static ssize_t __write_ports_delxprt(char *buf) | |
1002 | { | |
1003 | struct svc_xprt *xprt; | |
1004 | char transport[16]; | |
1005 | int port; | |
1006 | ||
1007 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
1008 | return -EINVAL; | |
1009 | ||
1010 | if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) | |
1011 | return -EINVAL; | |
1012 | ||
1013 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
1014 | if (xprt == NULL) | |
1015 | return -ENOTCONN; | |
1016 | ||
1017 | svc_close_xprt(xprt); | |
1018 | svc_xprt_put(xprt); | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) | |
1023 | { | |
1024 | if (size == 0) | |
1025 | return __write_ports_names(buf); | |
1026 | ||
1027 | if (isdigit(buf[0])) | |
1028 | return __write_ports_addfd(buf); | |
1029 | ||
1030 | if (buf[0] == '-' && isdigit(buf[1])) | |
1031 | return __write_ports_delfd(buf); | |
1032 | ||
1033 | if (isalpha(buf[0])) | |
1034 | return __write_ports_addxprt(buf); | |
1035 | ||
1036 | if (buf[0] == '-' && isalpha(buf[1])) | |
1037 | return __write_ports_delxprt(buf); | |
1038 | ||
1039 | return -EINVAL; | |
1040 | } | |
1041 | ||
1042 | /** | |
1043 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
1044 | * | |
1045 | * Input: | |
1046 | * buf: ignored | |
1047 | * size: zero | |
1048 | * Output: | |
1049 | * On success: passed-in buffer filled with a '\n'-terminated C | |
1050 | * string containing a whitespace-separated list of | |
1051 | * named NFSD listeners; | |
1052 | * return code is the size in bytes of the string | |
1053 | * On error: return code is zero or a negative errno value | |
1054 | * | |
1055 | * OR | |
1056 | * | |
1057 | * Input: | |
1058 | * buf: C string containing an unsigned | |
1059 | * integer value representing a bound | |
1060 | * but unconnected socket that is to be | |
1061 | * used as an NFSD listener; listen(3) | |
1062 | * must be called for a SOCK_STREAM | |
1063 | * socket, otherwise it is ignored | |
1064 | * size: non-zero length of C string in @buf | |
1065 | * Output: | |
1066 | * On success: NFS service is started; | |
1067 | * passed-in buffer filled with a '\n'-terminated C | |
1068 | * string containing a unique alphanumeric name of | |
1069 | * the listener; | |
1070 | * return code is the size in bytes of the string | |
1071 | * On error: return code is a negative errno value | |
1072 | * | |
1073 | * OR | |
1074 | * | |
1075 | * Input: | |
1076 | * buf: C string containing a "-" followed | |
1077 | * by an integer value representing a | |
1078 | * previously passed in socket file | |
1079 | * descriptor | |
1080 | * size: non-zero length of C string in @buf | |
1081 | * Output: | |
1082 | * On success: NFS service no longer listens on that socket; | |
1083 | * passed-in buffer filled with a '\n'-terminated C | |
1084 | * string containing a unique name of the listener; | |
1085 | * return code is the size in bytes of the string | |
1086 | * On error: return code is a negative errno value | |
1087 | * | |
1088 | * OR | |
1089 | * | |
1090 | * Input: | |
1091 | * buf: C string containing a transport | |
1092 | * name and an unsigned integer value | |
1093 | * representing the port to listen on, | |
1094 | * separated by whitespace | |
1095 | * size: non-zero length of C string in @buf | |
1096 | * Output: | |
1097 | * On success: returns zero; NFS service is started | |
1098 | * On error: return code is a negative errno value | |
1099 | * | |
1100 | * OR | |
1101 | * | |
1102 | * Input: | |
1103 | * buf: C string containing a "-" followed | |
1104 | * by a transport name and an unsigned | |
1105 | * integer value representing the port | |
1106 | * to listen on, separated by whitespace | |
1107 | * size: non-zero length of C string in @buf | |
1108 | * Output: | |
1109 | * On success: returns zero; NFS service no longer listens | |
1110 | * on that transport | |
1111 | * On error: return code is a negative errno value | |
1112 | */ | |
1113 | static ssize_t write_ports(struct file *file, char *buf, size_t size) | |
1114 | { | |
1115 | ssize_t rv; | |
1116 | ||
1117 | mutex_lock(&nfsd_mutex); | |
1118 | rv = __write_ports(file, buf, size); | |
1119 | mutex_unlock(&nfsd_mutex); | |
1120 | return rv; | |
1121 | } | |
1122 | ||
1123 | ||
1124 | int nfsd_max_blksize; | |
1125 | ||
1126 | /** | |
1127 | * write_maxblksize - Set or report the current NFS blksize | |
1128 | * | |
1129 | * Input: | |
1130 | * buf: ignored | |
1131 | * size: zero | |
1132 | * | |
1133 | * OR | |
1134 | * | |
1135 | * Input: | |
1136 | * buf: C string containing an unsigned | |
1137 | * integer value representing the new | |
1138 | * NFS blksize | |
1139 | * size: non-zero length of C string in @buf | |
1140 | * Output: | |
1141 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1142 | * containing numeric value of the current NFS blksize | |
1143 | * setting; | |
1144 | * return code is the size in bytes of the string | |
1145 | * On error: return code is zero or a negative errno value | |
1146 | */ | |
1147 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) | |
1148 | { | |
1149 | char *mesg = buf; | |
1150 | if (size > 0) { | |
1151 | int bsize; | |
1152 | int rv = get_int(&mesg, &bsize); | |
1153 | if (rv) | |
1154 | return rv; | |
1155 | /* force bsize into allowed range and | |
1156 | * required alignment. | |
1157 | */ | |
1158 | if (bsize < 1024) | |
1159 | bsize = 1024; | |
1160 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1161 | bsize = NFSSVC_MAXBLKSIZE; | |
1162 | bsize &= ~(1024-1); | |
1163 | mutex_lock(&nfsd_mutex); | |
1164 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { | |
1165 | mutex_unlock(&nfsd_mutex); | |
1166 | return -EBUSY; | |
1167 | } | |
1168 | nfsd_max_blksize = bsize; | |
1169 | mutex_unlock(&nfsd_mutex); | |
1170 | } | |
1171 | ||
1172 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
1173 | nfsd_max_blksize); | |
1174 | } | |
1175 | ||
1176 | #ifdef CONFIG_NFSD_V4 | |
1177 | extern time_t nfs4_leasetime(void); | |
1178 | ||
1179 | static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) | |
1180 | { | |
1181 | /* if size > 10 seconds, call | |
1182 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
1183 | */ | |
1184 | char *mesg = buf; | |
1185 | int rv, lease; | |
1186 | ||
1187 | if (size > 0) { | |
1188 | if (nfsd_serv) | |
1189 | return -EBUSY; | |
1190 | rv = get_int(&mesg, &lease); | |
1191 | if (rv) | |
1192 | return rv; | |
1193 | if (lease < 10 || lease > 3600) | |
1194 | return -EINVAL; | |
1195 | nfs4_reset_lease(lease); | |
1196 | } | |
1197 | ||
1198 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", | |
1199 | nfs4_lease_time()); | |
1200 | } | |
1201 | ||
1202 | /** | |
1203 | * write_leasetime - Set or report the current NFSv4 lease time | |
1204 | * | |
1205 | * Input: | |
1206 | * buf: ignored | |
1207 | * size: zero | |
1208 | * | |
1209 | * OR | |
1210 | * | |
1211 | * Input: | |
1212 | * buf: C string containing an unsigned | |
1213 | * integer value representing the new | |
1214 | * NFSv4 lease expiry time | |
1215 | * size: non-zero length of C string in @buf | |
1216 | * Output: | |
1217 | * On success: passed-in buffer filled with '\n'-terminated C | |
1218 | * string containing unsigned integer value of the | |
1219 | * current lease expiry time; | |
1220 | * return code is the size in bytes of the string | |
1221 | * On error: return code is zero or a negative errno value | |
1222 | */ | |
1223 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) | |
1224 | { | |
1225 | ssize_t rv; | |
1226 | ||
1227 | mutex_lock(&nfsd_mutex); | |
1228 | rv = __write_leasetime(file, buf, size); | |
1229 | mutex_unlock(&nfsd_mutex); | |
1230 | return rv; | |
1231 | } | |
1232 | ||
1233 | extern char *nfs4_recoverydir(void); | |
1234 | ||
1235 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
1236 | { | |
1237 | char *mesg = buf; | |
1238 | char *recdir; | |
1239 | int len, status; | |
1240 | ||
1241 | if (size > 0) { | |
1242 | if (nfsd_serv) | |
1243 | return -EBUSY; | |
1244 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1245 | return -EINVAL; | |
1246 | buf[size-1] = 0; | |
1247 | ||
1248 | recdir = mesg; | |
1249 | len = qword_get(&mesg, recdir, size); | |
1250 | if (len <= 0) | |
1251 | return -EINVAL; | |
1252 | ||
1253 | status = nfs4_reset_recoverydir(recdir); | |
1254 | } | |
1255 | ||
1256 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1257 | nfs4_recoverydir()); | |
1258 | } | |
1259 | ||
1260 | /** | |
1261 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1262 | * | |
1263 | * Input: | |
1264 | * buf: ignored | |
1265 | * size: zero | |
1266 | * | |
1267 | * OR | |
1268 | * | |
1269 | * Input: | |
1270 | * buf: C string containing the pathname | |
1271 | * of the directory on a local file | |
1272 | * system containing permanent NFSv4 | |
1273 | * recovery data | |
1274 | * size: non-zero length of C string in @buf | |
1275 | * Output: | |
1276 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1277 | * containing the current recovery pathname setting; | |
1278 | * return code is the size in bytes of the string | |
1279 | * On error: return code is zero or a negative errno value | |
1280 | */ | |
1281 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) | |
1282 | { | |
1283 | ssize_t rv; | |
1284 | ||
1285 | mutex_lock(&nfsd_mutex); | |
1286 | rv = __write_recoverydir(file, buf, size); | |
1287 | mutex_unlock(&nfsd_mutex); | |
1288 | return rv; | |
1289 | } | |
1290 | ||
1291 | #endif | |
1292 | ||
1293 | /*----------------------------------------------------------------------------*/ | |
1294 | /* | |
1295 | * populating the filesystem. | |
1296 | */ | |
1297 | ||
1298 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1299 | { | |
1300 | static struct tree_descr nfsd_files[] = { | |
1301 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
1302 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1303 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1304 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1305 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1306 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1307 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1308 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
1309 | [NFSD_FO_UnlockIP] = {"unlock_ip", | |
1310 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1311 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", | |
1312 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1313 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1314 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1315 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1316 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, | |
1317 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1318 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, | |
1319 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, | |
1320 | #ifdef CONFIG_NFSD_V4 | |
1321 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1322 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1323 | #endif | |
1324 | /* last one */ {""} | |
1325 | }; | |
1326 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1327 | } | |
1328 | ||
1329 | static int nfsd_get_sb(struct file_system_type *fs_type, | |
1330 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1331 | { | |
1332 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); | |
1333 | } | |
1334 | ||
1335 | static struct file_system_type nfsd_fs_type = { | |
1336 | .owner = THIS_MODULE, | |
1337 | .name = "nfsd", | |
1338 | .get_sb = nfsd_get_sb, | |
1339 | .kill_sb = kill_litter_super, | |
1340 | }; | |
1341 | ||
1342 | #ifdef CONFIG_PROC_FS | |
1343 | static int create_proc_exports_entry(void) | |
1344 | { | |
1345 | struct proc_dir_entry *entry; | |
1346 | ||
1347 | entry = proc_mkdir("fs/nfs", NULL); | |
1348 | if (!entry) | |
1349 | return -ENOMEM; | |
1350 | entry = proc_create("exports", 0, entry, &exports_operations); | |
1351 | if (!entry) | |
1352 | return -ENOMEM; | |
1353 | return 0; | |
1354 | } | |
1355 | #else /* CONFIG_PROC_FS */ | |
1356 | static int create_proc_exports_entry(void) | |
1357 | { | |
1358 | return 0; | |
1359 | } | |
1360 | #endif | |
1361 | ||
1362 | static int __init init_nfsd(void) | |
1363 | { | |
1364 | int retval; | |
1365 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1366 | ||
1367 | retval = nfs4_state_init(); /* nfs4 locking state */ | |
1368 | if (retval) | |
1369 | return retval; | |
1370 | nfsd_stat_init(); /* Statistics */ | |
1371 | retval = nfsd_reply_cache_init(); | |
1372 | if (retval) | |
1373 | goto out_free_stat; | |
1374 | retval = nfsd_export_init(); | |
1375 | if (retval) | |
1376 | goto out_free_cache; | |
1377 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ | |
1378 | retval = nfsd_idmap_init(); | |
1379 | if (retval) | |
1380 | goto out_free_lockd; | |
1381 | retval = create_proc_exports_entry(); | |
1382 | if (retval) | |
1383 | goto out_free_idmap; | |
1384 | retval = register_filesystem(&nfsd_fs_type); | |
1385 | if (retval) | |
1386 | goto out_free_all; | |
1387 | return 0; | |
1388 | out_free_all: | |
1389 | remove_proc_entry("fs/nfs/exports", NULL); | |
1390 | remove_proc_entry("fs/nfs", NULL); | |
1391 | out_free_idmap: | |
1392 | nfsd_idmap_shutdown(); | |
1393 | out_free_lockd: | |
1394 | nfsd_lockd_shutdown(); | |
1395 | nfsd_export_shutdown(); | |
1396 | out_free_cache: | |
1397 | nfsd_reply_cache_shutdown(); | |
1398 | out_free_stat: | |
1399 | nfsd_stat_shutdown(); | |
1400 | nfsd4_free_slabs(); | |
1401 | return retval; | |
1402 | } | |
1403 | ||
1404 | static void __exit exit_nfsd(void) | |
1405 | { | |
1406 | nfsd_export_shutdown(); | |
1407 | nfsd_reply_cache_shutdown(); | |
1408 | remove_proc_entry("fs/nfs/exports", NULL); | |
1409 | remove_proc_entry("fs/nfs", NULL); | |
1410 | nfsd_stat_shutdown(); | |
1411 | nfsd_lockd_shutdown(); | |
1412 | nfsd_idmap_shutdown(); | |
1413 | nfsd4_free_slabs(); | |
1414 | unregister_filesystem(&nfsd_fs_type); | |
1415 | } | |
1416 | ||
1417 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1418 | MODULE_LICENSE("GPL"); | |
1419 | module_init(init_nfsd) | |
1420 | module_exit(exit_nfsd) |