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 | ||
3f8206d4 | 9 | #include <linux/namei.h> |
b41b66d6 | 10 | #include <linux/ctype.h> |
1da177e4 | 11 | |
1da177e4 | 12 | #include <linux/nfsd_idmap.h> |
80212d59 | 13 | #include <linux/sunrpc/svcsock.h> |
1da177e4 | 14 | #include <linux/nfsd/syscall.h> |
4373ea84 | 15 | #include <linux/lockd/lockd.h> |
4116092b | 16 | #include <linux/sunrpc/clnt.h> |
1da177e4 | 17 | |
9a74af21 BH |
18 | #include "nfsd.h" |
19 | #include "cache.h" | |
20 | ||
1da177e4 LT |
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, | |
e8e8753f | 34 | NFSD_Export_features, |
1da177e4 | 35 | NFSD_Fh, |
4373ea84 | 36 | NFSD_FO_UnlockIP, |
17efa372 | 37 | NFSD_FO_UnlockFS, |
1da177e4 | 38 | NFSD_Threads, |
eed2965a | 39 | NFSD_Pool_Threads, |
03cf6c9f | 40 | NFSD_Pool_Stats, |
70c3b76c | 41 | NFSD_Versions, |
80212d59 | 42 | NFSD_Ports, |
596bbe53 | 43 | NFSD_MaxBlkSize, |
70c3b76c N |
44 | /* |
45 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
46 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
47 | */ | |
48 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 49 | NFSD_Leasetime, |
0964a3d3 | 50 | NFSD_RecoveryDir, |
70c3b76c | 51 | #endif |
1da177e4 LT |
52 | }; |
53 | ||
54 | /* | |
55 | * write() for these nodes. | |
56 | */ | |
57 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
58 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
59 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
60 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
61 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
62 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
63 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
64 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
b046ccdc CL |
65 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
66 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 67 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 68 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 69 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 70 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 71 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 72 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 73 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 74 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 75 | #endif |
1da177e4 LT |
76 | |
77 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
78 | [NFSD_Svc] = write_svc, | |
79 | [NFSD_Add] = write_add, | |
80 | [NFSD_Del] = write_del, | |
81 | [NFSD_Export] = write_export, | |
82 | [NFSD_Unexport] = write_unexport, | |
83 | [NFSD_Getfd] = write_getfd, | |
84 | [NFSD_Getfs] = write_getfs, | |
85 | [NFSD_Fh] = write_filehandle, | |
b046ccdc CL |
86 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
87 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 88 | [NFSD_Threads] = write_threads, |
eed2965a | 89 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 90 | [NFSD_Versions] = write_versions, |
80212d59 | 91 | [NFSD_Ports] = write_ports, |
596bbe53 | 92 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 93 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 94 | [NFSD_Leasetime] = write_leasetime, |
0964a3d3 | 95 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 96 | #endif |
1da177e4 LT |
97 | }; |
98 | ||
99 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
100 | { | |
7eaa36e2 | 101 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
102 | char *data; |
103 | ssize_t rv; | |
104 | ||
e8c96f8c | 105 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
106 | return -EINVAL; |
107 | ||
108 | data = simple_transaction_get(file, buf, size); | |
109 | if (IS_ERR(data)) | |
110 | return PTR_ERR(data); | |
111 | ||
112 | rv = write_op[ino](file, data, size); | |
8971a101 | 113 | if (rv >= 0) { |
1da177e4 LT |
114 | simple_transaction_set(file, rv); |
115 | rv = size; | |
116 | } | |
117 | return rv; | |
118 | } | |
119 | ||
7390022d N |
120 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
121 | { | |
122 | if (! file->private_data) { | |
123 | /* An attempt to read a transaction file without writing | |
124 | * causes a 0-byte write so that the file can return | |
125 | * state information | |
126 | */ | |
127 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
128 | if (rv < 0) | |
129 | return rv; | |
130 | } | |
131 | return simple_transaction_read(file, buf, size, pos); | |
132 | } | |
133 | ||
4b6f5d20 | 134 | static const struct file_operations transaction_ops = { |
1da177e4 | 135 | .write = nfsctl_transaction_write, |
7390022d | 136 | .read = nfsctl_transaction_read, |
1da177e4 LT |
137 | .release = simple_transaction_release, |
138 | }; | |
139 | ||
1da177e4 LT |
140 | static int exports_open(struct inode *inode, struct file *file) |
141 | { | |
142 | return seq_open(file, &nfs_exports_op); | |
143 | } | |
144 | ||
4b6f5d20 | 145 | static const struct file_operations exports_operations = { |
1da177e4 LT |
146 | .open = exports_open, |
147 | .read = seq_read, | |
148 | .llseek = seq_lseek, | |
149 | .release = seq_release, | |
9ef2db26 | 150 | .owner = THIS_MODULE, |
1da177e4 LT |
151 | }; |
152 | ||
e8e8753f BF |
153 | static int export_features_show(struct seq_file *m, void *v) |
154 | { | |
155 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static int export_features_open(struct inode *inode, struct file *file) | |
160 | { | |
161 | return single_open(file, export_features_show, NULL); | |
162 | } | |
163 | ||
164 | static struct file_operations export_features_operations = { | |
165 | .open = export_features_open, | |
166 | .read = seq_read, | |
167 | .llseek = seq_lseek, | |
168 | .release = single_release, | |
169 | }; | |
170 | ||
03cf6c9f | 171 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); |
ed2d8aed | 172 | extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); |
03cf6c9f | 173 | |
828c0950 | 174 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
175 | .open = nfsd_pool_stats_open, |
176 | .read = seq_read, | |
177 | .llseek = seq_lseek, | |
ed2d8aed | 178 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
179 | .owner = THIS_MODULE, |
180 | }; | |
181 | ||
1da177e4 LT |
182 | /*----------------------------------------------------------------------------*/ |
183 | /* | |
184 | * payload - write methods | |
1da177e4 LT |
185 | */ |
186 | ||
262a0982 CL |
187 | /** |
188 | * write_svc - Start kernel's NFSD server | |
189 | * | |
190 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
191 | * Function remains to support old versions of nfs-utils. | |
192 | * | |
193 | * Input: | |
194 | * buf: struct nfsctl_svc | |
195 | * svc_port: port number of this | |
196 | * server's listener | |
197 | * svc_nthreads: number of threads to start | |
198 | * size: size in bytes of passed in nfsctl_svc | |
199 | * Output: | |
200 | * On success: returns zero | |
201 | * On error: return code is negative errno value | |
202 | */ | |
1da177e4 LT |
203 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
204 | { | |
205 | struct nfsctl_svc *data; | |
82e12fe9 | 206 | int err; |
1da177e4 LT |
207 | if (size < sizeof(*data)) |
208 | return -EINVAL; | |
209 | data = (struct nfsctl_svc*) buf; | |
82e12fe9 N |
210 | err = nfsd_svc(data->svc_port, data->svc_nthreads); |
211 | if (err < 0) | |
212 | return err; | |
213 | return 0; | |
1da177e4 LT |
214 | } |
215 | ||
262a0982 CL |
216 | /** |
217 | * write_add - Add or modify client entry in auth unix cache | |
218 | * | |
219 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
220 | * Function remains to support old versions of nfs-utils. | |
221 | * | |
222 | * Input: | |
223 | * buf: struct nfsctl_client | |
224 | * cl_ident: '\0'-terminated C string | |
225 | * containing domain name | |
226 | * of client | |
227 | * cl_naddr: no. of items in cl_addrlist | |
228 | * cl_addrlist: array of client addresses | |
229 | * cl_fhkeytype: ignored | |
230 | * cl_fhkeylen: ignored | |
231 | * cl_fhkey: ignored | |
232 | * size: size in bytes of passed in nfsctl_client | |
233 | * Output: | |
234 | * On success: returns zero | |
235 | * On error: return code is negative errno value | |
236 | * | |
237 | * Note: Only AF_INET client addresses are passed in, since | |
238 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
239 | */ | |
1da177e4 LT |
240 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
241 | { | |
242 | struct nfsctl_client *data; | |
243 | if (size < sizeof(*data)) | |
244 | return -EINVAL; | |
245 | data = (struct nfsctl_client *)buf; | |
246 | return exp_addclient(data); | |
247 | } | |
248 | ||
262a0982 CL |
249 | /** |
250 | * write_del - Remove client from auth unix cache | |
251 | * | |
252 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
253 | * Function remains to support old versions of nfs-utils. | |
254 | * | |
255 | * Input: | |
256 | * buf: struct nfsctl_client | |
257 | * cl_ident: '\0'-terminated C string | |
258 | * containing domain name | |
259 | * of client | |
260 | * cl_naddr: ignored | |
261 | * cl_addrlist: ignored | |
262 | * cl_fhkeytype: ignored | |
263 | * cl_fhkeylen: ignored | |
264 | * cl_fhkey: ignored | |
265 | * size: size in bytes of passed in nfsctl_client | |
266 | * Output: | |
267 | * On success: returns zero | |
268 | * On error: return code is negative errno value | |
269 | * | |
270 | * Note: Only AF_INET client addresses are passed in, since | |
271 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
272 | */ | |
1da177e4 LT |
273 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
274 | { | |
275 | struct nfsctl_client *data; | |
276 | if (size < sizeof(*data)) | |
277 | return -EINVAL; | |
278 | data = (struct nfsctl_client *)buf; | |
279 | return exp_delclient(data); | |
280 | } | |
281 | ||
262a0982 CL |
282 | /** |
283 | * write_export - Export part or all of a local file system | |
284 | * | |
285 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
286 | * Function remains to support old versions of nfs-utils. | |
287 | * | |
288 | * Input: | |
289 | * buf: struct nfsctl_export | |
290 | * ex_client: '\0'-terminated C string | |
291 | * containing domain name | |
292 | * of client allowed to access | |
293 | * this export | |
294 | * ex_path: '\0'-terminated C string | |
295 | * containing pathname of | |
296 | * directory in local file system | |
297 | * ex_dev: fsid to use for this export | |
298 | * ex_ino: ignored | |
299 | * ex_flags: export flags for this export | |
300 | * ex_anon_uid: UID to use for anonymous | |
301 | * requests | |
302 | * ex_anon_gid: GID to use for anonymous | |
303 | * requests | |
304 | * size: size in bytes of passed in nfsctl_export | |
305 | * Output: | |
306 | * On success: returns zero | |
307 | * On error: return code is negative errno value | |
308 | */ | |
1da177e4 LT |
309 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
310 | { | |
311 | struct nfsctl_export *data; | |
312 | if (size < sizeof(*data)) | |
313 | return -EINVAL; | |
314 | data = (struct nfsctl_export*)buf; | |
315 | return exp_export(data); | |
316 | } | |
317 | ||
262a0982 CL |
318 | /** |
319 | * write_unexport - Unexport a previously exported file system | |
320 | * | |
321 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
322 | * Function remains to support old versions of nfs-utils. | |
323 | * | |
324 | * Input: | |
325 | * buf: struct nfsctl_export | |
326 | * ex_client: '\0'-terminated C string | |
327 | * containing domain name | |
328 | * of client no longer allowed | |
329 | * to access this export | |
330 | * ex_path: '\0'-terminated C string | |
331 | * containing pathname of | |
332 | * directory in local file system | |
333 | * ex_dev: ignored | |
334 | * ex_ino: ignored | |
335 | * ex_flags: ignored | |
336 | * ex_anon_uid: ignored | |
337 | * ex_anon_gid: ignored | |
338 | * size: size in bytes of passed in nfsctl_export | |
339 | * Output: | |
340 | * On success: returns zero | |
341 | * On error: return code is negative errno value | |
342 | */ | |
1da177e4 LT |
343 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
344 | { | |
345 | struct nfsctl_export *data; | |
346 | ||
347 | if (size < sizeof(*data)) | |
348 | return -EINVAL; | |
349 | data = (struct nfsctl_export*)buf; | |
350 | return exp_unexport(data); | |
351 | } | |
352 | ||
262a0982 CL |
353 | /** |
354 | * write_getfs - Get a variable-length NFS file handle by path | |
355 | * | |
356 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
357 | * Function remains to support old versions of nfs-utils. | |
358 | * | |
359 | * Input: | |
360 | * buf: struct nfsctl_fsparm | |
361 | * gd_addr: socket address of client | |
362 | * gd_path: '\0'-terminated C string | |
363 | * containing pathname of | |
364 | * directory in local file system | |
365 | * gd_maxlen: maximum size of returned file | |
366 | * handle | |
367 | * size: size in bytes of passed in nfsctl_fsparm | |
368 | * Output: | |
369 | * On success: passed-in buffer filled with a knfsd_fh structure | |
370 | * (a variable-length raw NFS file handle); | |
371 | * return code is the size in bytes of the file handle | |
372 | * On error: return code is negative errno value | |
373 | * | |
374 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
375 | * is the same size as a struct sockaddr_in. | |
376 | */ | |
1da177e4 LT |
377 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
378 | { | |
379 | struct nfsctl_fsparm *data; | |
380 | struct sockaddr_in *sin; | |
381 | struct auth_domain *clp; | |
382 | int err = 0; | |
383 | struct knfsd_fh *res; | |
f15364bd | 384 | struct in6_addr in6; |
1da177e4 LT |
385 | |
386 | if (size < sizeof(*data)) | |
387 | return -EINVAL; | |
388 | data = (struct nfsctl_fsparm*)buf; | |
389 | err = -EPROTONOSUPPORT; | |
390 | if (data->gd_addr.sa_family != AF_INET) | |
391 | goto out; | |
392 | sin = (struct sockaddr_in *)&data->gd_addr; | |
393 | if (data->gd_maxlen > NFS3_FHSIZE) | |
394 | data->gd_maxlen = NFS3_FHSIZE; | |
395 | ||
396 | res = (struct knfsd_fh*)buf; | |
397 | ||
398 | exp_readlock(); | |
f15364bd AC |
399 | |
400 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
401 | ||
402 | clp = auth_unix_lookup(&in6); | |
403 | if (!clp) | |
1da177e4 LT |
404 | err = -EPERM; |
405 | else { | |
406 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
407 | auth_domain_put(clp); | |
408 | } | |
409 | exp_readunlock(); | |
410 | if (err == 0) | |
12127498 | 411 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
412 | out: |
413 | return err; | |
414 | } | |
415 | ||
262a0982 CL |
416 | /** |
417 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
418 | * | |
419 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
420 | * Function remains to support old versions of nfs-utils. | |
421 | * | |
422 | * Input: | |
423 | * buf: struct nfsctl_fdparm | |
424 | * gd_addr: socket address of client | |
425 | * gd_path: '\0'-terminated C string | |
426 | * containing pathname of | |
427 | * directory in local file system | |
428 | * gd_version: fdparm structure version | |
429 | * size: size in bytes of passed in nfsctl_fdparm | |
430 | * Output: | |
431 | * On success: passed-in buffer filled with nfsctl_res | |
432 | * (a fixed-length raw NFS file handle); | |
433 | * return code is the size in bytes of the file handle | |
434 | * On error: return code is negative errno value | |
435 | * | |
436 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
437 | * is the same size as a struct sockaddr_in. | |
438 | */ | |
1da177e4 LT |
439 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
440 | { | |
441 | struct nfsctl_fdparm *data; | |
442 | struct sockaddr_in *sin; | |
443 | struct auth_domain *clp; | |
444 | int err = 0; | |
445 | struct knfsd_fh fh; | |
446 | char *res; | |
f15364bd | 447 | struct in6_addr in6; |
1da177e4 LT |
448 | |
449 | if (size < sizeof(*data)) | |
450 | return -EINVAL; | |
451 | data = (struct nfsctl_fdparm*)buf; | |
452 | err = -EPROTONOSUPPORT; | |
453 | if (data->gd_addr.sa_family != AF_INET) | |
454 | goto out; | |
455 | err = -EINVAL; | |
456 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
457 | goto out; | |
458 | ||
459 | res = buf; | |
460 | sin = (struct sockaddr_in *)&data->gd_addr; | |
461 | exp_readlock(); | |
f15364bd AC |
462 | |
463 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
464 | ||
465 | clp = auth_unix_lookup(&in6); | |
466 | if (!clp) | |
1da177e4 LT |
467 | err = -EPERM; |
468 | else { | |
469 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
470 | auth_domain_put(clp); | |
471 | } | |
472 | exp_readunlock(); | |
473 | ||
474 | if (err == 0) { | |
475 | memset(res,0, NFS_FHSIZE); | |
476 | memcpy(res, &fh.fh_base, fh.fh_size); | |
477 | err = NFS_FHSIZE; | |
478 | } | |
479 | out: | |
480 | return err; | |
481 | } | |
482 | ||
262a0982 CL |
483 | /** |
484 | * write_unlock_ip - Release all locks used by a client | |
485 | * | |
486 | * Experimental. | |
487 | * | |
488 | * Input: | |
489 | * buf: '\n'-terminated C string containing a | |
4116092b | 490 | * presentation format IP address |
262a0982 CL |
491 | * size: length of C string in @buf |
492 | * Output: | |
493 | * On success: returns zero if all specified locks were released; | |
494 | * returns one if one or more locks were not released | |
495 | * On error: return code is negative errno value | |
262a0982 | 496 | */ |
b046ccdc | 497 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 498 | { |
4116092b CL |
499 | struct sockaddr_storage address; |
500 | struct sockaddr *sap = (struct sockaddr *)&address; | |
501 | size_t salen = sizeof(address); | |
367c8c7b | 502 | char *fo_path; |
4373ea84 WC |
503 | |
504 | /* sanity check */ | |
505 | if (size == 0) | |
506 | return -EINVAL; | |
507 | ||
508 | if (buf[size-1] != '\n') | |
509 | return -EINVAL; | |
510 | ||
511 | fo_path = buf; | |
512 | if (qword_get(&buf, fo_path, size) < 0) | |
513 | return -EINVAL; | |
514 | ||
4116092b | 515 | if (rpc_pton(fo_path, size, sap, salen) == 0) |
4373ea84 | 516 | return -EINVAL; |
4373ea84 | 517 | |
4116092b | 518 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
519 | } |
520 | ||
262a0982 CL |
521 | /** |
522 | * write_unlock_fs - Release all locks on a local file system | |
523 | * | |
524 | * Experimental. | |
525 | * | |
526 | * Input: | |
527 | * buf: '\n'-terminated C string containing the | |
528 | * absolute pathname of a local file system | |
529 | * size: length of C string in @buf | |
530 | * Output: | |
531 | * On success: returns zero if all specified locks were released; | |
532 | * returns one if one or more locks were not released | |
533 | * On error: return code is negative errno value | |
534 | */ | |
b046ccdc | 535 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 536 | { |
a63bb996 | 537 | struct path path; |
17efa372 WC |
538 | char *fo_path; |
539 | int error; | |
540 | ||
541 | /* sanity check */ | |
542 | if (size == 0) | |
543 | return -EINVAL; | |
544 | ||
545 | if (buf[size-1] != '\n') | |
546 | return -EINVAL; | |
547 | ||
548 | fo_path = buf; | |
549 | if (qword_get(&buf, fo_path, size) < 0) | |
550 | return -EINVAL; | |
551 | ||
a63bb996 | 552 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
553 | if (error) |
554 | return error; | |
555 | ||
262a0982 CL |
556 | /* |
557 | * XXX: Needs better sanity checking. Otherwise we could end up | |
558 | * releasing locks on the wrong file system. | |
559 | * | |
560 | * For example: | |
561 | * 1. Does the path refer to a directory? | |
562 | * 2. Is that directory a mount point, or | |
563 | * 3. Is that directory the root of an exported file system? | |
564 | */ | |
a63bb996 | 565 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 566 | |
a63bb996 | 567 | path_put(&path); |
17efa372 WC |
568 | return error; |
569 | } | |
570 | ||
262a0982 CL |
571 | /** |
572 | * write_filehandle - Get a variable-length NFS file handle by path | |
573 | * | |
574 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
575 | * three alphanumeric words separated by whitespace. The string may | |
576 | * contain escape sequences. | |
577 | * | |
578 | * Input: | |
579 | * buf: | |
580 | * domain: client domain name | |
581 | * path: export pathname | |
582 | * maxsize: numeric maximum size of | |
583 | * @buf | |
584 | * size: length of C string in @buf | |
585 | * Output: | |
586 | * On success: passed-in buffer filled with '\n'-terminated C | |
587 | * string containing a ASCII hex text version | |
588 | * of the NFS file handle; | |
589 | * return code is the size in bytes of the string | |
590 | * On error: return code is negative errno value | |
591 | */ | |
1da177e4 LT |
592 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
593 | { | |
1da177e4 | 594 | char *dname, *path; |
246d95ba | 595 | int uninitialized_var(maxsize); |
1da177e4 LT |
596 | char *mesg = buf; |
597 | int len; | |
598 | struct auth_domain *dom; | |
599 | struct knfsd_fh fh; | |
600 | ||
87d26ea7 BF |
601 | if (size == 0) |
602 | return -EINVAL; | |
603 | ||
1da177e4 LT |
604 | if (buf[size-1] != '\n') |
605 | return -EINVAL; | |
606 | buf[size-1] = 0; | |
607 | ||
608 | dname = mesg; | |
609 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
610 | if (len <= 0) |
611 | return -EINVAL; | |
1da177e4 LT |
612 | |
613 | path = dname+len+1; | |
614 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
615 | if (len <= 0) |
616 | return -EINVAL; | |
1da177e4 LT |
617 | |
618 | len = get_int(&mesg, &maxsize); | |
619 | if (len) | |
620 | return len; | |
621 | ||
622 | if (maxsize < NFS_FHSIZE) | |
623 | return -EINVAL; | |
624 | if (maxsize > NFS3_FHSIZE) | |
625 | maxsize = NFS3_FHSIZE; | |
626 | ||
627 | if (qword_get(&mesg, mesg, size)>0) | |
628 | return -EINVAL; | |
629 | ||
630 | /* we have all the words, they are in buf.. */ | |
631 | dom = unix_domain_find(dname); | |
632 | if (!dom) | |
633 | return -ENOMEM; | |
634 | ||
635 | len = exp_rootfh(dom, path, &fh, maxsize); | |
636 | auth_domain_put(dom); | |
637 | if (len) | |
638 | return len; | |
639 | ||
54224f04 CL |
640 | mesg = buf; |
641 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
642 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
643 | mesg[-1] = '\n'; | |
644 | return mesg - buf; | |
645 | } | |
646 | ||
262a0982 CL |
647 | /** |
648 | * write_threads - Start NFSD, or report the current number of running threads | |
649 | * | |
650 | * Input: | |
651 | * buf: ignored | |
652 | * size: zero | |
653 | * Output: | |
654 | * On success: passed-in buffer filled with '\n'-terminated C | |
655 | * string numeric value representing the number of | |
656 | * running NFSD threads; | |
657 | * return code is the size in bytes of the string | |
658 | * On error: return code is zero | |
659 | * | |
660 | * OR | |
661 | * | |
662 | * Input: | |
663 | * buf: C string containing an unsigned | |
664 | * integer value representing the | |
665 | * number of NFSD threads to start | |
666 | * size: non-zero length of C string in @buf | |
667 | * Output: | |
668 | * On success: NFS service is started; | |
669 | * passed-in buffer filled with '\n'-terminated C | |
670 | * string numeric value representing the number of | |
671 | * running NFSD threads; | |
672 | * return code is the size in bytes of the string | |
673 | * On error: return code is zero or a negative errno value | |
674 | */ | |
1da177e4 LT |
675 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
676 | { | |
1da177e4 LT |
677 | char *mesg = buf; |
678 | int rv; | |
679 | if (size > 0) { | |
680 | int newthreads; | |
681 | rv = get_int(&mesg, &newthreads); | |
682 | if (rv) | |
683 | return rv; | |
9e074856 | 684 | if (newthreads < 0) |
1da177e4 | 685 | return -EINVAL; |
9e074856 | 686 | rv = nfsd_svc(NFS_PORT, newthreads); |
82e12fe9 | 687 | if (rv < 0) |
1da177e4 | 688 | return rv; |
82e12fe9 N |
689 | } else |
690 | rv = nfsd_nrthreads(); | |
e06b6405 | 691 | |
82e12fe9 | 692 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
693 | } |
694 | ||
262a0982 CL |
695 | /** |
696 | * write_pool_threads - Set or report the current number of threads per pool | |
697 | * | |
698 | * Input: | |
699 | * buf: ignored | |
700 | * size: zero | |
701 | * | |
702 | * OR | |
703 | * | |
704 | * Input: | |
705 | * buf: C string containing whitespace- | |
706 | * separated unsigned integer values | |
707 | * representing the number of NFSD | |
708 | * threads to start in each pool | |
709 | * size: non-zero length of C string in @buf | |
710 | * Output: | |
711 | * On success: passed-in buffer filled with '\n'-terminated C | |
712 | * string containing integer values representing the | |
713 | * number of NFSD threads in each pool; | |
714 | * return code is the size in bytes of the string | |
715 | * On error: return code is zero or a negative errno value | |
716 | */ | |
eed2965a GB |
717 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
718 | { | |
719 | /* if size > 0, look for an array of number of threads per node | |
720 | * and apply them then write out number of threads per node as reply | |
721 | */ | |
722 | char *mesg = buf; | |
723 | int i; | |
724 | int rv; | |
725 | int len; | |
bedbdd8b | 726 | int npools; |
eed2965a GB |
727 | int *nthreads; |
728 | ||
bedbdd8b NB |
729 | mutex_lock(&nfsd_mutex); |
730 | npools = nfsd_nrpools(); | |
eed2965a GB |
731 | if (npools == 0) { |
732 | /* | |
733 | * NFS is shut down. The admin can start it by | |
734 | * writing to the threads file but NOT the pool_threads | |
735 | * file, sorry. Report zero threads. | |
736 | */ | |
bedbdd8b | 737 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
738 | strcpy(buf, "0\n"); |
739 | return strlen(buf); | |
740 | } | |
741 | ||
742 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 743 | rv = -ENOMEM; |
eed2965a | 744 | if (nthreads == NULL) |
bedbdd8b | 745 | goto out_free; |
eed2965a GB |
746 | |
747 | if (size > 0) { | |
748 | for (i = 0; i < npools; i++) { | |
749 | rv = get_int(&mesg, &nthreads[i]); | |
750 | if (rv == -ENOENT) | |
751 | break; /* fewer numbers than pools */ | |
752 | if (rv) | |
753 | goto out_free; /* syntax error */ | |
754 | rv = -EINVAL; | |
755 | if (nthreads[i] < 0) | |
756 | goto out_free; | |
757 | } | |
758 | rv = nfsd_set_nrthreads(i, nthreads); | |
759 | if (rv) | |
760 | goto out_free; | |
761 | } | |
762 | ||
763 | rv = nfsd_get_nrthreads(npools, nthreads); | |
764 | if (rv) | |
765 | goto out_free; | |
766 | ||
767 | mesg = buf; | |
768 | size = SIMPLE_TRANSACTION_LIMIT; | |
769 | for (i = 0; i < npools && size > 0; i++) { | |
770 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
771 | len = strlen(mesg); | |
772 | size -= len; | |
773 | mesg += len; | |
774 | } | |
413d63d7 | 775 | rv = mesg - buf; |
eed2965a GB |
776 | out_free: |
777 | kfree(nthreads); | |
bedbdd8b | 778 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
779 | return rv; |
780 | } | |
781 | ||
3dd98a3b | 782 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 783 | { |
70c3b76c | 784 | char *mesg = buf; |
8daf220a | 785 | char *vers, *minorp, sign; |
261758b5 | 786 | int len, num, remaining; |
8daf220a | 787 | unsigned minor; |
70c3b76c N |
788 | ssize_t tlen = 0; |
789 | char *sep; | |
790 | ||
791 | if (size>0) { | |
792 | if (nfsd_serv) | |
6658d3a7 N |
793 | /* Cannot change versions without updating |
794 | * nfsd_serv->sv_xdrsize, and reallocing | |
795 | * rq_argp and rq_resp | |
796 | */ | |
70c3b76c N |
797 | return -EBUSY; |
798 | if (buf[size-1] != '\n') | |
799 | return -EINVAL; | |
800 | buf[size-1] = 0; | |
801 | ||
802 | vers = mesg; | |
803 | len = qword_get(&mesg, vers, size); | |
804 | if (len <= 0) return -EINVAL; | |
805 | do { | |
806 | sign = *vers; | |
807 | if (sign == '+' || sign == '-') | |
8daf220a | 808 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 809 | else |
8daf220a BH |
810 | num = simple_strtol(vers, &minorp, 0); |
811 | if (*minorp == '.') { | |
812 | if (num < 4) | |
813 | return -EINVAL; | |
814 | minor = simple_strtoul(minorp+1, NULL, 0); | |
815 | if (minor == 0) | |
816 | return -EINVAL; | |
817 | if (nfsd_minorversion(minor, sign == '-' ? | |
818 | NFSD_CLEAR : NFSD_SET) < 0) | |
819 | return -EINVAL; | |
820 | goto next; | |
821 | } | |
70c3b76c N |
822 | switch(num) { |
823 | case 2: | |
824 | case 3: | |
825 | case 4: | |
6658d3a7 | 826 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
827 | break; |
828 | default: | |
829 | return -EINVAL; | |
830 | } | |
8daf220a | 831 | next: |
70c3b76c | 832 | vers += len + 1; |
70c3b76c N |
833 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
834 | /* If all get turned off, turn them back on, as | |
835 | * having no versions is BAD | |
836 | */ | |
6658d3a7 | 837 | nfsd_reset_versions(); |
70c3b76c | 838 | } |
261758b5 | 839 | |
70c3b76c N |
840 | /* Now write current state into reply buffer */ |
841 | len = 0; | |
842 | sep = ""; | |
261758b5 | 843 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 844 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 845 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 846 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 847 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
848 | num); |
849 | sep = " "; | |
261758b5 CL |
850 | |
851 | if (len > remaining) | |
852 | break; | |
853 | remaining -= len; | |
854 | buf += len; | |
855 | tlen += len; | |
70c3b76c | 856 | } |
8daf220a | 857 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
858 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
859 | minor++) { | |
860 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
861 | (nfsd_vers(4, NFSD_TEST) && |
862 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
863 | '+' : '-', | |
864 | minor); | |
261758b5 CL |
865 | |
866 | if (len > remaining) | |
867 | break; | |
868 | remaining -= len; | |
869 | buf += len; | |
870 | tlen += len; | |
871 | } | |
872 | ||
873 | len = snprintf(buf, remaining, "\n"); | |
874 | if (len > remaining) | |
875 | return -EINVAL; | |
876 | return tlen + len; | |
70c3b76c N |
877 | } |
878 | ||
262a0982 CL |
879 | /** |
880 | * write_versions - Set or report the available NFS protocol versions | |
881 | * | |
882 | * Input: | |
883 | * buf: ignored | |
884 | * size: zero | |
885 | * Output: | |
886 | * On success: passed-in buffer filled with '\n'-terminated C | |
887 | * string containing positive or negative integer | |
888 | * values representing the current status of each | |
889 | * protocol version; | |
890 | * return code is the size in bytes of the string | |
891 | * On error: return code is zero or a negative errno value | |
892 | * | |
893 | * OR | |
894 | * | |
895 | * Input: | |
896 | * buf: C string containing whitespace- | |
897 | * separated positive or negative | |
898 | * integer values representing NFS | |
899 | * protocol versions to enable ("+n") | |
900 | * or disable ("-n") | |
901 | * size: non-zero length of C string in @buf | |
902 | * Output: | |
903 | * On success: status of zero or more protocol versions has | |
904 | * been updated; passed-in buffer filled with | |
905 | * '\n'-terminated C string containing positive | |
906 | * or negative integer values representing the | |
907 | * current status of each protocol version; | |
908 | * return code is the size in bytes of the string | |
909 | * On error: return code is zero or a negative errno value | |
910 | */ | |
3dd98a3b JL |
911 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
912 | { | |
913 | ssize_t rv; | |
914 | ||
915 | mutex_lock(&nfsd_mutex); | |
916 | rv = __write_versions(file, buf, size); | |
917 | mutex_unlock(&nfsd_mutex); | |
918 | return rv; | |
919 | } | |
920 | ||
0a5372d8 CL |
921 | /* |
922 | * Zero-length write. Return a list of NFSD's current listener | |
923 | * transports. | |
924 | */ | |
925 | static ssize_t __write_ports_names(char *buf) | |
926 | { | |
927 | if (nfsd_serv == NULL) | |
928 | return 0; | |
335c54bd | 929 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
930 | } |
931 | ||
0b7c2f6f CL |
932 | /* |
933 | * A single 'fd' number was written, in which case it must be for | |
934 | * a socket of a supported family/protocol, and we use it as an | |
935 | * nfsd listener. | |
936 | */ | |
937 | static ssize_t __write_ports_addfd(char *buf) | |
938 | { | |
939 | char *mesg = buf; | |
940 | int fd, err; | |
941 | ||
942 | err = get_int(&mesg, &fd); | |
943 | if (err != 0 || fd < 0) | |
944 | return -EINVAL; | |
945 | ||
946 | err = nfsd_create_serv(); | |
947 | if (err != 0) | |
948 | return err; | |
949 | ||
ea068bad CL |
950 | err = lockd_up(); |
951 | if (err != 0) | |
952 | goto out; | |
0b7c2f6f | 953 | |
bfba9ab4 | 954 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
ea068bad CL |
955 | if (err < 0) |
956 | lockd_down(); | |
0b7c2f6f | 957 | |
ea068bad CL |
958 | out: |
959 | /* Decrease the count, but don't shut down the service */ | |
960 | nfsd_serv->sv_nrthreads--; | |
961 | return err; | |
0b7c2f6f CL |
962 | } |
963 | ||
82d56591 CL |
964 | /* |
965 | * A '-' followed by the 'name' of a socket means we close the socket. | |
966 | */ | |
967 | static ssize_t __write_ports_delfd(char *buf) | |
968 | { | |
969 | char *toclose; | |
970 | int len = 0; | |
971 | ||
972 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
973 | if (toclose == NULL) | |
974 | return -ENOMEM; | |
975 | ||
976 | if (nfsd_serv != NULL) | |
8435d34d CL |
977 | len = svc_sock_names(nfsd_serv, buf, |
978 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
82d56591 CL |
979 | if (len >= 0) |
980 | lockd_down(); | |
981 | ||
982 | kfree(toclose); | |
983 | return len; | |
984 | } | |
985 | ||
4eb68c26 CL |
986 | /* |
987 | * A transport listener is added by writing it's transport name and | |
988 | * a port number. | |
989 | */ | |
990 | static ssize_t __write_ports_addxprt(char *buf) | |
991 | { | |
992 | char transport[16]; | |
993 | int port, err; | |
994 | ||
995 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
996 | return -EINVAL; | |
997 | ||
998 | if (port < 1 || port > USHORT_MAX) | |
999 | return -EINVAL; | |
1000 | ||
1001 | err = nfsd_create_serv(); | |
1002 | if (err != 0) | |
1003 | return err; | |
1004 | ||
1005 | err = svc_create_xprt(nfsd_serv, transport, | |
1006 | PF_INET, port, SVC_SOCK_ANONYMOUS); | |
1007 | if (err < 0) { | |
1008 | /* Give a reasonable perror msg for bad transport string */ | |
1009 | if (err == -ENOENT) | |
1010 | err = -EPROTONOSUPPORT; | |
1011 | return err; | |
1012 | } | |
1013 | return 0; | |
1014 | } | |
1015 | ||
4cd5dc75 CL |
1016 | /* |
1017 | * A transport listener is removed by writing a "-", it's transport | |
1018 | * name, and it's port number. | |
1019 | */ | |
1020 | static ssize_t __write_ports_delxprt(char *buf) | |
1021 | { | |
1022 | struct svc_xprt *xprt; | |
1023 | char transport[16]; | |
1024 | int port; | |
1025 | ||
1026 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
1027 | return -EINVAL; | |
1028 | ||
1029 | if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) | |
1030 | return -EINVAL; | |
1031 | ||
1032 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
1033 | if (xprt == NULL) | |
1034 | return -ENOTCONN; | |
1035 | ||
1036 | svc_close_xprt(xprt); | |
1037 | svc_xprt_put(xprt); | |
1038 | return 0; | |
1039 | } | |
1040 | ||
bedbdd8b | 1041 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 1042 | { |
0a5372d8 CL |
1043 | if (size == 0) |
1044 | return __write_ports_names(buf); | |
0b7c2f6f CL |
1045 | |
1046 | if (isdigit(buf[0])) | |
1047 | return __write_ports_addfd(buf); | |
82d56591 CL |
1048 | |
1049 | if (buf[0] == '-' && isdigit(buf[1])) | |
1050 | return __write_ports_delfd(buf); | |
4eb68c26 CL |
1051 | |
1052 | if (isalpha(buf[0])) | |
1053 | return __write_ports_addxprt(buf); | |
4cd5dc75 CL |
1054 | |
1055 | if (buf[0] == '-' && isalpha(buf[1])) | |
1056 | return __write_ports_delxprt(buf); | |
1057 | ||
b41b66d6 | 1058 | return -EINVAL; |
80212d59 N |
1059 | } |
1060 | ||
262a0982 CL |
1061 | /** |
1062 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
1063 | * | |
1064 | * Input: | |
1065 | * buf: ignored | |
1066 | * size: zero | |
1067 | * Output: | |
1068 | * On success: passed-in buffer filled with a '\n'-terminated C | |
1069 | * string containing a whitespace-separated list of | |
1070 | * named NFSD listeners; | |
1071 | * return code is the size in bytes of the string | |
1072 | * On error: return code is zero or a negative errno value | |
1073 | * | |
1074 | * OR | |
1075 | * | |
1076 | * Input: | |
1077 | * buf: C string containing an unsigned | |
1078 | * integer value representing a bound | |
1079 | * but unconnected socket that is to be | |
c71206a7 CL |
1080 | * used as an NFSD listener; listen(3) |
1081 | * must be called for a SOCK_STREAM | |
1082 | * socket, otherwise it is ignored | |
262a0982 CL |
1083 | * size: non-zero length of C string in @buf |
1084 | * Output: | |
1085 | * On success: NFS service is started; | |
1086 | * passed-in buffer filled with a '\n'-terminated C | |
1087 | * string containing a unique alphanumeric name of | |
1088 | * the listener; | |
1089 | * return code is the size in bytes of the string | |
1090 | * On error: return code is a negative errno value | |
1091 | * | |
1092 | * OR | |
1093 | * | |
1094 | * Input: | |
1095 | * buf: C string containing a "-" followed | |
1096 | * by an integer value representing a | |
1097 | * previously passed in socket file | |
1098 | * descriptor | |
1099 | * size: non-zero length of C string in @buf | |
1100 | * Output: | |
1101 | * On success: NFS service no longer listens on that socket; | |
1102 | * passed-in buffer filled with a '\n'-terminated C | |
1103 | * string containing a unique name of the listener; | |
1104 | * return code is the size in bytes of the string | |
1105 | * On error: return code is a negative errno value | |
1106 | * | |
1107 | * OR | |
1108 | * | |
1109 | * Input: | |
1110 | * buf: C string containing a transport | |
1111 | * name and an unsigned integer value | |
1112 | * representing the port to listen on, | |
1113 | * separated by whitespace | |
1114 | * size: non-zero length of C string in @buf | |
1115 | * Output: | |
1116 | * On success: returns zero; NFS service is started | |
1117 | * On error: return code is a negative errno value | |
1118 | * | |
1119 | * OR | |
1120 | * | |
1121 | * Input: | |
1122 | * buf: C string containing a "-" followed | |
1123 | * by a transport name and an unsigned | |
1124 | * integer value representing the port | |
1125 | * to listen on, separated by whitespace | |
1126 | * size: non-zero length of C string in @buf | |
1127 | * Output: | |
1128 | * On success: returns zero; NFS service no longer listens | |
1129 | * on that transport | |
1130 | * On error: return code is a negative errno value | |
1131 | */ | |
bedbdd8b NB |
1132 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
1133 | { | |
1134 | ssize_t rv; | |
3dd98a3b | 1135 | |
bedbdd8b NB |
1136 | mutex_lock(&nfsd_mutex); |
1137 | rv = __write_ports(file, buf, size); | |
1138 | mutex_unlock(&nfsd_mutex); | |
1139 | return rv; | |
1140 | } | |
1141 | ||
1142 | ||
596bbe53 N |
1143 | int nfsd_max_blksize; |
1144 | ||
262a0982 CL |
1145 | /** |
1146 | * write_maxblksize - Set or report the current NFS blksize | |
1147 | * | |
1148 | * Input: | |
1149 | * buf: ignored | |
1150 | * size: zero | |
1151 | * | |
1152 | * OR | |
1153 | * | |
1154 | * Input: | |
1155 | * buf: C string containing an unsigned | |
1156 | * integer value representing the new | |
1157 | * NFS blksize | |
1158 | * size: non-zero length of C string in @buf | |
1159 | * Output: | |
1160 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1161 | * containing numeric value of the current NFS blksize | |
1162 | * setting; | |
1163 | * return code is the size in bytes of the string | |
1164 | * On error: return code is zero or a negative errno value | |
1165 | */ | |
596bbe53 N |
1166 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
1167 | { | |
1168 | char *mesg = buf; | |
1169 | if (size > 0) { | |
1170 | int bsize; | |
1171 | int rv = get_int(&mesg, &bsize); | |
1172 | if (rv) | |
1173 | return rv; | |
1174 | /* force bsize into allowed range and | |
1175 | * required alignment. | |
1176 | */ | |
1177 | if (bsize < 1024) | |
1178 | bsize = 1024; | |
1179 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1180 | bsize = NFSSVC_MAXBLKSIZE; | |
1181 | bsize &= ~(1024-1); | |
bedbdd8b | 1182 | mutex_lock(&nfsd_mutex); |
596bbe53 | 1183 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
bedbdd8b | 1184 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1185 | return -EBUSY; |
1186 | } | |
1187 | nfsd_max_blksize = bsize; | |
bedbdd8b | 1188 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 1189 | } |
e06b6405 CL |
1190 | |
1191 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
1192 | nfsd_max_blksize); | |
596bbe53 N |
1193 | } |
1194 | ||
70c3b76c | 1195 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
1196 | extern time_t nfs4_leasetime(void); |
1197 | ||
3dd98a3b | 1198 | static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) |
1da177e4 LT |
1199 | { |
1200 | /* if size > 10 seconds, call | |
1201 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
1202 | */ | |
1203 | char *mesg = buf; | |
3dd98a3b | 1204 | int rv, lease; |
1da177e4 LT |
1205 | |
1206 | if (size > 0) { | |
3dd98a3b JL |
1207 | if (nfsd_serv) |
1208 | return -EBUSY; | |
1da177e4 LT |
1209 | rv = get_int(&mesg, &lease); |
1210 | if (rv) | |
1211 | return rv; | |
1212 | if (lease < 10 || lease > 3600) | |
1213 | return -EINVAL; | |
1214 | nfs4_reset_lease(lease); | |
1215 | } | |
e06b6405 CL |
1216 | |
1217 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", | |
1218 | nfs4_lease_time()); | |
1da177e4 LT |
1219 | } |
1220 | ||
262a0982 CL |
1221 | /** |
1222 | * write_leasetime - Set or report the current NFSv4 lease time | |
1223 | * | |
1224 | * Input: | |
1225 | * buf: ignored | |
1226 | * size: zero | |
1227 | * | |
1228 | * OR | |
1229 | * | |
1230 | * Input: | |
1231 | * buf: C string containing an unsigned | |
1232 | * integer value representing the new | |
1233 | * NFSv4 lease expiry time | |
1234 | * size: non-zero length of C string in @buf | |
1235 | * Output: | |
1236 | * On success: passed-in buffer filled with '\n'-terminated C | |
1237 | * string containing unsigned integer value of the | |
1238 | * current lease expiry time; | |
1239 | * return code is the size in bytes of the string | |
1240 | * On error: return code is zero or a negative errno value | |
1241 | */ | |
3dd98a3b JL |
1242 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1243 | { | |
1244 | ssize_t rv; | |
1245 | ||
1246 | mutex_lock(&nfsd_mutex); | |
1247 | rv = __write_leasetime(file, buf, size); | |
1248 | mutex_unlock(&nfsd_mutex); | |
1249 | return rv; | |
1250 | } | |
1251 | ||
1252 | extern char *nfs4_recoverydir(void); | |
1253 | ||
1254 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
1255 | { |
1256 | char *mesg = buf; | |
1257 | char *recdir; | |
1258 | int len, status; | |
1259 | ||
3dd98a3b JL |
1260 | if (size > 0) { |
1261 | if (nfsd_serv) | |
1262 | return -EBUSY; | |
1263 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1264 | return -EINVAL; | |
1265 | buf[size-1] = 0; | |
0964a3d3 | 1266 | |
3dd98a3b JL |
1267 | recdir = mesg; |
1268 | len = qword_get(&mesg, recdir, size); | |
1269 | if (len <= 0) | |
1270 | return -EINVAL; | |
0964a3d3 | 1271 | |
3dd98a3b JL |
1272 | status = nfs4_reset_recoverydir(recdir); |
1273 | } | |
3d72ab8f CL |
1274 | |
1275 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1276 | nfs4_recoverydir()); | |
0964a3d3 | 1277 | } |
3dd98a3b | 1278 | |
262a0982 CL |
1279 | /** |
1280 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1281 | * | |
1282 | * Input: | |
1283 | * buf: ignored | |
1284 | * size: zero | |
1285 | * | |
1286 | * OR | |
1287 | * | |
1288 | * Input: | |
1289 | * buf: C string containing the pathname | |
1290 | * of the directory on a local file | |
1291 | * system containing permanent NFSv4 | |
1292 | * recovery data | |
1293 | * size: non-zero length of C string in @buf | |
1294 | * Output: | |
1295 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1296 | * containing the current recovery pathname setting; | |
1297 | * return code is the size in bytes of the string | |
1298 | * On error: return code is zero or a negative errno value | |
1299 | */ | |
3dd98a3b JL |
1300 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1301 | { | |
1302 | ssize_t rv; | |
1303 | ||
1304 | mutex_lock(&nfsd_mutex); | |
1305 | rv = __write_recoverydir(file, buf, size); | |
1306 | mutex_unlock(&nfsd_mutex); | |
1307 | return rv; | |
1308 | } | |
1309 | ||
70c3b76c | 1310 | #endif |
0964a3d3 | 1311 | |
1da177e4 LT |
1312 | /*----------------------------------------------------------------------------*/ |
1313 | /* | |
1314 | * populating the filesystem. | |
1315 | */ | |
1316 | ||
1317 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1318 | { | |
1319 | static struct tree_descr nfsd_files[] = { | |
1320 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
1321 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1322 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1323 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1324 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1325 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1326 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1327 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
e8e8753f BF |
1328 | [NFSD_Export_features] = {"export_features", |
1329 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1330 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1331 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1332 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1333 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1334 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1335 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1336 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1337 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
70c3b76c | 1338 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1339 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1340 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1341 | #ifdef CONFIG_NFSD_V4 |
1342 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 1343 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1344 | #endif |
1345 | /* last one */ {""} | |
1346 | }; | |
1347 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1348 | } | |
1349 | ||
454e2398 DH |
1350 | static int nfsd_get_sb(struct file_system_type *fs_type, |
1351 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 1352 | { |
454e2398 | 1353 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
1354 | } |
1355 | ||
1356 | static struct file_system_type nfsd_fs_type = { | |
1357 | .owner = THIS_MODULE, | |
1358 | .name = "nfsd", | |
1359 | .get_sb = nfsd_get_sb, | |
1360 | .kill_sb = kill_litter_super, | |
1361 | }; | |
1362 | ||
e331f606 BF |
1363 | #ifdef CONFIG_PROC_FS |
1364 | static int create_proc_exports_entry(void) | |
1365 | { | |
1366 | struct proc_dir_entry *entry; | |
1367 | ||
1368 | entry = proc_mkdir("fs/nfs", NULL); | |
1369 | if (!entry) | |
1370 | return -ENOMEM; | |
9ef2db26 | 1371 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1372 | if (!entry) |
1373 | return -ENOMEM; | |
e331f606 BF |
1374 | return 0; |
1375 | } | |
1376 | #else /* CONFIG_PROC_FS */ | |
1377 | static int create_proc_exports_entry(void) | |
1378 | { | |
1379 | return 0; | |
1380 | } | |
1381 | #endif | |
1382 | ||
1da177e4 LT |
1383 | static int __init init_nfsd(void) |
1384 | { | |
1385 | int retval; | |
1386 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1387 | ||
e8ff2a84 BF |
1388 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1389 | if (retval) | |
1390 | return retval; | |
1da177e4 | 1391 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1392 | retval = nfsd_reply_cache_init(); |
1393 | if (retval) | |
1394 | goto out_free_stat; | |
dbf847ec BF |
1395 | retval = nfsd_export_init(); |
1396 | if (retval) | |
1397 | goto out_free_cache; | |
1da177e4 | 1398 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1399 | retval = nfsd_idmap_init(); |
1400 | if (retval) | |
1401 | goto out_free_lockd; | |
e331f606 BF |
1402 | retval = create_proc_exports_entry(); |
1403 | if (retval) | |
1404 | goto out_free_idmap; | |
1da177e4 | 1405 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1406 | if (retval) |
1407 | goto out_free_all; | |
1408 | return 0; | |
1409 | out_free_all: | |
26808d3f BF |
1410 | remove_proc_entry("fs/nfs/exports", NULL); |
1411 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1412 | out_free_idmap: |
dbf847ec BF |
1413 | nfsd_idmap_shutdown(); |
1414 | out_free_lockd: | |
26808d3f | 1415 | nfsd_lockd_shutdown(); |
e331f606 | 1416 | nfsd_export_shutdown(); |
dbf847ec | 1417 | out_free_cache: |
e331f606 | 1418 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1419 | out_free_stat: |
1420 | nfsd_stat_shutdown(); | |
26808d3f | 1421 | nfsd4_free_slabs(); |
1da177e4 LT |
1422 | return retval; |
1423 | } | |
1424 | ||
1425 | static void __exit exit_nfsd(void) | |
1426 | { | |
1427 | nfsd_export_shutdown(); | |
d5c3428b | 1428 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1429 | remove_proc_entry("fs/nfs/exports", NULL); |
1430 | remove_proc_entry("fs/nfs", NULL); | |
1431 | nfsd_stat_shutdown(); | |
1432 | nfsd_lockd_shutdown(); | |
1da177e4 | 1433 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1434 | nfsd4_free_slabs(); |
1da177e4 LT |
1435 | unregister_filesystem(&nfsd_fs_type); |
1436 | } | |
1437 | ||
1438 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1439 | MODULE_LICENSE("GPL"); | |
1440 | module_init(init_nfsd) | |
1441 | module_exit(exit_nfsd) |