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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfsctl.c | |
3 | * | |
4 | * Syscall interface to knfsd. | |
5 | * | |
6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/module.h> |
10 | ||
11 | #include <linux/linkage.h> | |
12 | #include <linux/time.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/fs.h> | |
3f8206d4 | 15 | #include <linux/namei.h> |
1da177e4 LT |
16 | #include <linux/fcntl.h> |
17 | #include <linux/net.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/syscalls.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/proc_fs.h> | |
23 | #include <linux/seq_file.h> | |
24 | #include <linux/pagemap.h> | |
25 | #include <linux/init.h> | |
4373ea84 | 26 | #include <linux/inet.h> |
70c3b76c | 27 | #include <linux/string.h> |
80212d59 | 28 | #include <linux/smp_lock.h> |
b41b66d6 | 29 | #include <linux/ctype.h> |
1da177e4 LT |
30 | |
31 | #include <linux/nfs.h> | |
32 | #include <linux/nfsd_idmap.h> | |
b41b66d6 | 33 | #include <linux/lockd/bind.h> |
1da177e4 | 34 | #include <linux/sunrpc/svc.h> |
80212d59 | 35 | #include <linux/sunrpc/svcsock.h> |
1da177e4 LT |
36 | #include <linux/nfsd/nfsd.h> |
37 | #include <linux/nfsd/cache.h> | |
38 | #include <linux/nfsd/xdr.h> | |
39 | #include <linux/nfsd/syscall.h> | |
4373ea84 | 40 | #include <linux/lockd/lockd.h> |
1da177e4 LT |
41 | |
42 | #include <asm/uaccess.h> | |
f15364bd | 43 | #include <net/ipv6.h> |
1da177e4 LT |
44 | |
45 | /* | |
46 | * We have a single directory with 9 nodes in it. | |
47 | */ | |
48 | enum { | |
49 | NFSD_Root = 1, | |
50 | NFSD_Svc, | |
51 | NFSD_Add, | |
52 | NFSD_Del, | |
53 | NFSD_Export, | |
54 | NFSD_Unexport, | |
55 | NFSD_Getfd, | |
56 | NFSD_Getfs, | |
57 | NFSD_List, | |
58 | NFSD_Fh, | |
4373ea84 | 59 | NFSD_FO_UnlockIP, |
17efa372 | 60 | NFSD_FO_UnlockFS, |
1da177e4 | 61 | NFSD_Threads, |
eed2965a | 62 | NFSD_Pool_Threads, |
70c3b76c | 63 | NFSD_Versions, |
80212d59 | 64 | NFSD_Ports, |
596bbe53 | 65 | NFSD_MaxBlkSize, |
70c3b76c N |
66 | /* |
67 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
68 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
69 | */ | |
70 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 71 | NFSD_Leasetime, |
0964a3d3 | 72 | NFSD_RecoveryDir, |
70c3b76c | 73 | #endif |
1da177e4 LT |
74 | }; |
75 | ||
76 | /* | |
77 | * write() for these nodes. | |
78 | */ | |
79 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
80 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
81 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
82 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
83 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
84 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
85 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
86 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
b046ccdc CL |
87 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
88 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 89 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 90 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 91 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 92 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 93 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 94 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 95 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 96 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 97 | #endif |
1da177e4 LT |
98 | |
99 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
100 | [NFSD_Svc] = write_svc, | |
101 | [NFSD_Add] = write_add, | |
102 | [NFSD_Del] = write_del, | |
103 | [NFSD_Export] = write_export, | |
104 | [NFSD_Unexport] = write_unexport, | |
105 | [NFSD_Getfd] = write_getfd, | |
106 | [NFSD_Getfs] = write_getfs, | |
107 | [NFSD_Fh] = write_filehandle, | |
b046ccdc CL |
108 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
109 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 110 | [NFSD_Threads] = write_threads, |
eed2965a | 111 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 112 | [NFSD_Versions] = write_versions, |
80212d59 | 113 | [NFSD_Ports] = write_ports, |
596bbe53 | 114 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 115 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 116 | [NFSD_Leasetime] = write_leasetime, |
0964a3d3 | 117 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 118 | #endif |
1da177e4 LT |
119 | }; |
120 | ||
121 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
122 | { | |
7eaa36e2 | 123 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
124 | char *data; |
125 | ssize_t rv; | |
126 | ||
e8c96f8c | 127 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
128 | return -EINVAL; |
129 | ||
130 | data = simple_transaction_get(file, buf, size); | |
131 | if (IS_ERR(data)) | |
132 | return PTR_ERR(data); | |
133 | ||
134 | rv = write_op[ino](file, data, size); | |
8971a101 | 135 | if (rv >= 0) { |
1da177e4 LT |
136 | simple_transaction_set(file, rv); |
137 | rv = size; | |
138 | } | |
139 | return rv; | |
140 | } | |
141 | ||
7390022d N |
142 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
143 | { | |
144 | if (! file->private_data) { | |
145 | /* An attempt to read a transaction file without writing | |
146 | * causes a 0-byte write so that the file can return | |
147 | * state information | |
148 | */ | |
149 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
150 | if (rv < 0) | |
151 | return rv; | |
152 | } | |
153 | return simple_transaction_read(file, buf, size, pos); | |
154 | } | |
155 | ||
4b6f5d20 | 156 | static const struct file_operations transaction_ops = { |
1da177e4 | 157 | .write = nfsctl_transaction_write, |
7390022d | 158 | .read = nfsctl_transaction_read, |
1da177e4 LT |
159 | .release = simple_transaction_release, |
160 | }; | |
161 | ||
1da177e4 LT |
162 | static int exports_open(struct inode *inode, struct file *file) |
163 | { | |
164 | return seq_open(file, &nfs_exports_op); | |
165 | } | |
166 | ||
4b6f5d20 | 167 | static const struct file_operations exports_operations = { |
1da177e4 LT |
168 | .open = exports_open, |
169 | .read = seq_read, | |
170 | .llseek = seq_lseek, | |
171 | .release = seq_release, | |
9ef2db26 | 172 | .owner = THIS_MODULE, |
1da177e4 LT |
173 | }; |
174 | ||
175 | /*----------------------------------------------------------------------------*/ | |
176 | /* | |
177 | * payload - write methods | |
1da177e4 LT |
178 | */ |
179 | ||
262a0982 CL |
180 | /** |
181 | * write_svc - Start kernel's NFSD server | |
182 | * | |
183 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
184 | * Function remains to support old versions of nfs-utils. | |
185 | * | |
186 | * Input: | |
187 | * buf: struct nfsctl_svc | |
188 | * svc_port: port number of this | |
189 | * server's listener | |
190 | * svc_nthreads: number of threads to start | |
191 | * size: size in bytes of passed in nfsctl_svc | |
192 | * Output: | |
193 | * On success: returns zero | |
194 | * On error: return code is negative errno value | |
195 | */ | |
1da177e4 LT |
196 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
197 | { | |
198 | struct nfsctl_svc *data; | |
199 | if (size < sizeof(*data)) | |
200 | return -EINVAL; | |
201 | data = (struct nfsctl_svc*) buf; | |
202 | return nfsd_svc(data->svc_port, data->svc_nthreads); | |
203 | } | |
204 | ||
262a0982 CL |
205 | /** |
206 | * write_add - Add or modify client entry in auth unix cache | |
207 | * | |
208 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
209 | * Function remains to support old versions of nfs-utils. | |
210 | * | |
211 | * Input: | |
212 | * buf: struct nfsctl_client | |
213 | * cl_ident: '\0'-terminated C string | |
214 | * containing domain name | |
215 | * of client | |
216 | * cl_naddr: no. of items in cl_addrlist | |
217 | * cl_addrlist: array of client addresses | |
218 | * cl_fhkeytype: ignored | |
219 | * cl_fhkeylen: ignored | |
220 | * cl_fhkey: ignored | |
221 | * size: size in bytes of passed in nfsctl_client | |
222 | * Output: | |
223 | * On success: returns zero | |
224 | * On error: return code is negative errno value | |
225 | * | |
226 | * Note: Only AF_INET client addresses are passed in, since | |
227 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
228 | */ | |
1da177e4 LT |
229 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
230 | { | |
231 | struct nfsctl_client *data; | |
232 | if (size < sizeof(*data)) | |
233 | return -EINVAL; | |
234 | data = (struct nfsctl_client *)buf; | |
235 | return exp_addclient(data); | |
236 | } | |
237 | ||
262a0982 CL |
238 | /** |
239 | * write_del - Remove client from auth unix cache | |
240 | * | |
241 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
242 | * Function remains to support old versions of nfs-utils. | |
243 | * | |
244 | * Input: | |
245 | * buf: struct nfsctl_client | |
246 | * cl_ident: '\0'-terminated C string | |
247 | * containing domain name | |
248 | * of client | |
249 | * cl_naddr: ignored | |
250 | * cl_addrlist: ignored | |
251 | * cl_fhkeytype: ignored | |
252 | * cl_fhkeylen: ignored | |
253 | * cl_fhkey: ignored | |
254 | * size: size in bytes of passed in nfsctl_client | |
255 | * Output: | |
256 | * On success: returns zero | |
257 | * On error: return code is negative errno value | |
258 | * | |
259 | * Note: Only AF_INET client addresses are passed in, since | |
260 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
261 | */ | |
1da177e4 LT |
262 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
263 | { | |
264 | struct nfsctl_client *data; | |
265 | if (size < sizeof(*data)) | |
266 | return -EINVAL; | |
267 | data = (struct nfsctl_client *)buf; | |
268 | return exp_delclient(data); | |
269 | } | |
270 | ||
262a0982 CL |
271 | /** |
272 | * write_export - Export part or all of a local file system | |
273 | * | |
274 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
275 | * Function remains to support old versions of nfs-utils. | |
276 | * | |
277 | * Input: | |
278 | * buf: struct nfsctl_export | |
279 | * ex_client: '\0'-terminated C string | |
280 | * containing domain name | |
281 | * of client allowed to access | |
282 | * this export | |
283 | * ex_path: '\0'-terminated C string | |
284 | * containing pathname of | |
285 | * directory in local file system | |
286 | * ex_dev: fsid to use for this export | |
287 | * ex_ino: ignored | |
288 | * ex_flags: export flags for this export | |
289 | * ex_anon_uid: UID to use for anonymous | |
290 | * requests | |
291 | * ex_anon_gid: GID to use for anonymous | |
292 | * requests | |
293 | * size: size in bytes of passed in nfsctl_export | |
294 | * Output: | |
295 | * On success: returns zero | |
296 | * On error: return code is negative errno value | |
297 | */ | |
1da177e4 LT |
298 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
299 | { | |
300 | struct nfsctl_export *data; | |
301 | if (size < sizeof(*data)) | |
302 | return -EINVAL; | |
303 | data = (struct nfsctl_export*)buf; | |
304 | return exp_export(data); | |
305 | } | |
306 | ||
262a0982 CL |
307 | /** |
308 | * write_unexport - Unexport a previously exported file system | |
309 | * | |
310 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
311 | * Function remains to support old versions of nfs-utils. | |
312 | * | |
313 | * Input: | |
314 | * buf: struct nfsctl_export | |
315 | * ex_client: '\0'-terminated C string | |
316 | * containing domain name | |
317 | * of client no longer allowed | |
318 | * to access this export | |
319 | * ex_path: '\0'-terminated C string | |
320 | * containing pathname of | |
321 | * directory in local file system | |
322 | * ex_dev: ignored | |
323 | * ex_ino: ignored | |
324 | * ex_flags: ignored | |
325 | * ex_anon_uid: ignored | |
326 | * ex_anon_gid: ignored | |
327 | * size: size in bytes of passed in nfsctl_export | |
328 | * Output: | |
329 | * On success: returns zero | |
330 | * On error: return code is negative errno value | |
331 | */ | |
1da177e4 LT |
332 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
333 | { | |
334 | struct nfsctl_export *data; | |
335 | ||
336 | if (size < sizeof(*data)) | |
337 | return -EINVAL; | |
338 | data = (struct nfsctl_export*)buf; | |
339 | return exp_unexport(data); | |
340 | } | |
341 | ||
262a0982 CL |
342 | /** |
343 | * write_getfs - Get a variable-length NFS file handle by path | |
344 | * | |
345 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
346 | * Function remains to support old versions of nfs-utils. | |
347 | * | |
348 | * Input: | |
349 | * buf: struct nfsctl_fsparm | |
350 | * gd_addr: socket address of client | |
351 | * gd_path: '\0'-terminated C string | |
352 | * containing pathname of | |
353 | * directory in local file system | |
354 | * gd_maxlen: maximum size of returned file | |
355 | * handle | |
356 | * size: size in bytes of passed in nfsctl_fsparm | |
357 | * Output: | |
358 | * On success: passed-in buffer filled with a knfsd_fh structure | |
359 | * (a variable-length raw NFS file handle); | |
360 | * return code is the size in bytes of the file handle | |
361 | * On error: return code is negative errno value | |
362 | * | |
363 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
364 | * is the same size as a struct sockaddr_in. | |
365 | */ | |
1da177e4 LT |
366 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
367 | { | |
368 | struct nfsctl_fsparm *data; | |
369 | struct sockaddr_in *sin; | |
370 | struct auth_domain *clp; | |
371 | int err = 0; | |
372 | struct knfsd_fh *res; | |
f15364bd | 373 | struct in6_addr in6; |
1da177e4 LT |
374 | |
375 | if (size < sizeof(*data)) | |
376 | return -EINVAL; | |
377 | data = (struct nfsctl_fsparm*)buf; | |
378 | err = -EPROTONOSUPPORT; | |
379 | if (data->gd_addr.sa_family != AF_INET) | |
380 | goto out; | |
381 | sin = (struct sockaddr_in *)&data->gd_addr; | |
382 | if (data->gd_maxlen > NFS3_FHSIZE) | |
383 | data->gd_maxlen = NFS3_FHSIZE; | |
384 | ||
385 | res = (struct knfsd_fh*)buf; | |
386 | ||
387 | exp_readlock(); | |
f15364bd AC |
388 | |
389 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
390 | ||
391 | clp = auth_unix_lookup(&in6); | |
392 | if (!clp) | |
1da177e4 LT |
393 | err = -EPERM; |
394 | else { | |
395 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
396 | auth_domain_put(clp); | |
397 | } | |
398 | exp_readunlock(); | |
399 | if (err == 0) | |
12127498 | 400 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
401 | out: |
402 | return err; | |
403 | } | |
404 | ||
262a0982 CL |
405 | /** |
406 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
407 | * | |
408 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
409 | * Function remains to support old versions of nfs-utils. | |
410 | * | |
411 | * Input: | |
412 | * buf: struct nfsctl_fdparm | |
413 | * gd_addr: socket address of client | |
414 | * gd_path: '\0'-terminated C string | |
415 | * containing pathname of | |
416 | * directory in local file system | |
417 | * gd_version: fdparm structure version | |
418 | * size: size in bytes of passed in nfsctl_fdparm | |
419 | * Output: | |
420 | * On success: passed-in buffer filled with nfsctl_res | |
421 | * (a fixed-length raw NFS file handle); | |
422 | * return code is the size in bytes of the file handle | |
423 | * On error: return code is negative errno value | |
424 | * | |
425 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
426 | * is the same size as a struct sockaddr_in. | |
427 | */ | |
1da177e4 LT |
428 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
429 | { | |
430 | struct nfsctl_fdparm *data; | |
431 | struct sockaddr_in *sin; | |
432 | struct auth_domain *clp; | |
433 | int err = 0; | |
434 | struct knfsd_fh fh; | |
435 | char *res; | |
f15364bd | 436 | struct in6_addr in6; |
1da177e4 LT |
437 | |
438 | if (size < sizeof(*data)) | |
439 | return -EINVAL; | |
440 | data = (struct nfsctl_fdparm*)buf; | |
441 | err = -EPROTONOSUPPORT; | |
442 | if (data->gd_addr.sa_family != AF_INET) | |
443 | goto out; | |
444 | err = -EINVAL; | |
445 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
446 | goto out; | |
447 | ||
448 | res = buf; | |
449 | sin = (struct sockaddr_in *)&data->gd_addr; | |
450 | exp_readlock(); | |
f15364bd AC |
451 | |
452 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
453 | ||
454 | clp = auth_unix_lookup(&in6); | |
455 | if (!clp) | |
1da177e4 LT |
456 | err = -EPERM; |
457 | else { | |
458 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
459 | auth_domain_put(clp); | |
460 | } | |
461 | exp_readunlock(); | |
462 | ||
463 | if (err == 0) { | |
464 | memset(res,0, NFS_FHSIZE); | |
465 | memcpy(res, &fh.fh_base, fh.fh_size); | |
466 | err = NFS_FHSIZE; | |
467 | } | |
468 | out: | |
469 | return err; | |
470 | } | |
471 | ||
262a0982 CL |
472 | /** |
473 | * write_unlock_ip - Release all locks used by a client | |
474 | * | |
475 | * Experimental. | |
476 | * | |
477 | * Input: | |
478 | * buf: '\n'-terminated C string containing a | |
479 | * presentation format IPv4 address | |
480 | * size: length of C string in @buf | |
481 | * Output: | |
482 | * On success: returns zero if all specified locks were released; | |
483 | * returns one if one or more locks were not released | |
484 | * On error: return code is negative errno value | |
485 | * | |
486 | * Note: Only AF_INET client addresses are passed in | |
487 | */ | |
b046ccdc | 488 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 489 | { |
367c8c7b CL |
490 | struct sockaddr_in sin = { |
491 | .sin_family = AF_INET, | |
492 | }; | |
4373ea84 | 493 | int b1, b2, b3, b4; |
367c8c7b CL |
494 | char c; |
495 | char *fo_path; | |
4373ea84 WC |
496 | |
497 | /* sanity check */ | |
498 | if (size == 0) | |
499 | return -EINVAL; | |
500 | ||
501 | if (buf[size-1] != '\n') | |
502 | return -EINVAL; | |
503 | ||
504 | fo_path = buf; | |
505 | if (qword_get(&buf, fo_path, size) < 0) | |
506 | return -EINVAL; | |
507 | ||
508 | /* get ipv4 address */ | |
be859405 | 509 | if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) |
367c8c7b CL |
510 | return -EINVAL; |
511 | if (b1 > 255 || b2 > 255 || b3 > 255 || b4 > 255) | |
4373ea84 | 512 | return -EINVAL; |
367c8c7b | 513 | sin.sin_addr.s_addr = htonl((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); |
4373ea84 | 514 | |
367c8c7b | 515 | return nlmsvc_unlock_all_by_ip((struct sockaddr *)&sin); |
4373ea84 WC |
516 | } |
517 | ||
262a0982 CL |
518 | /** |
519 | * write_unlock_fs - Release all locks on a local file system | |
520 | * | |
521 | * Experimental. | |
522 | * | |
523 | * Input: | |
524 | * buf: '\n'-terminated C string containing the | |
525 | * absolute pathname of a local file system | |
526 | * size: length of C string in @buf | |
527 | * Output: | |
528 | * On success: returns zero if all specified locks were released; | |
529 | * returns one if one or more locks were not released | |
530 | * On error: return code is negative errno value | |
531 | */ | |
b046ccdc | 532 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 533 | { |
a63bb996 | 534 | struct path path; |
17efa372 WC |
535 | char *fo_path; |
536 | int error; | |
537 | ||
538 | /* sanity check */ | |
539 | if (size == 0) | |
540 | return -EINVAL; | |
541 | ||
542 | if (buf[size-1] != '\n') | |
543 | return -EINVAL; | |
544 | ||
545 | fo_path = buf; | |
546 | if (qword_get(&buf, fo_path, size) < 0) | |
547 | return -EINVAL; | |
548 | ||
a63bb996 | 549 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
550 | if (error) |
551 | return error; | |
552 | ||
262a0982 CL |
553 | /* |
554 | * XXX: Needs better sanity checking. Otherwise we could end up | |
555 | * releasing locks on the wrong file system. | |
556 | * | |
557 | * For example: | |
558 | * 1. Does the path refer to a directory? | |
559 | * 2. Is that directory a mount point, or | |
560 | * 3. Is that directory the root of an exported file system? | |
561 | */ | |
a63bb996 | 562 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 563 | |
a63bb996 | 564 | path_put(&path); |
17efa372 WC |
565 | return error; |
566 | } | |
567 | ||
262a0982 CL |
568 | /** |
569 | * write_filehandle - Get a variable-length NFS file handle by path | |
570 | * | |
571 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
572 | * three alphanumeric words separated by whitespace. The string may | |
573 | * contain escape sequences. | |
574 | * | |
575 | * Input: | |
576 | * buf: | |
577 | * domain: client domain name | |
578 | * path: export pathname | |
579 | * maxsize: numeric maximum size of | |
580 | * @buf | |
581 | * size: length of C string in @buf | |
582 | * Output: | |
583 | * On success: passed-in buffer filled with '\n'-terminated C | |
584 | * string containing a ASCII hex text version | |
585 | * of the NFS file handle; | |
586 | * return code is the size in bytes of the string | |
587 | * On error: return code is negative errno value | |
588 | */ | |
1da177e4 LT |
589 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
590 | { | |
1da177e4 | 591 | char *dname, *path; |
246d95ba | 592 | int uninitialized_var(maxsize); |
1da177e4 LT |
593 | char *mesg = buf; |
594 | int len; | |
595 | struct auth_domain *dom; | |
596 | struct knfsd_fh fh; | |
597 | ||
87d26ea7 BF |
598 | if (size == 0) |
599 | return -EINVAL; | |
600 | ||
1da177e4 LT |
601 | if (buf[size-1] != '\n') |
602 | return -EINVAL; | |
603 | buf[size-1] = 0; | |
604 | ||
605 | dname = mesg; | |
606 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
607 | if (len <= 0) |
608 | return -EINVAL; | |
1da177e4 LT |
609 | |
610 | path = dname+len+1; | |
611 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
612 | if (len <= 0) |
613 | return -EINVAL; | |
1da177e4 LT |
614 | |
615 | len = get_int(&mesg, &maxsize); | |
616 | if (len) | |
617 | return len; | |
618 | ||
619 | if (maxsize < NFS_FHSIZE) | |
620 | return -EINVAL; | |
621 | if (maxsize > NFS3_FHSIZE) | |
622 | maxsize = NFS3_FHSIZE; | |
623 | ||
624 | if (qword_get(&mesg, mesg, size)>0) | |
625 | return -EINVAL; | |
626 | ||
627 | /* we have all the words, they are in buf.. */ | |
628 | dom = unix_domain_find(dname); | |
629 | if (!dom) | |
630 | return -ENOMEM; | |
631 | ||
632 | len = exp_rootfh(dom, path, &fh, maxsize); | |
633 | auth_domain_put(dom); | |
634 | if (len) | |
635 | return len; | |
636 | ||
54224f04 CL |
637 | mesg = buf; |
638 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
639 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
640 | mesg[-1] = '\n'; | |
641 | return mesg - buf; | |
642 | } | |
643 | ||
262a0982 CL |
644 | /** |
645 | * write_threads - Start NFSD, or report the current number of running threads | |
646 | * | |
647 | * Input: | |
648 | * buf: ignored | |
649 | * size: zero | |
650 | * Output: | |
651 | * On success: passed-in buffer filled with '\n'-terminated C | |
652 | * string numeric value representing the number of | |
653 | * running NFSD threads; | |
654 | * return code is the size in bytes of the string | |
655 | * On error: return code is zero | |
656 | * | |
657 | * OR | |
658 | * | |
659 | * Input: | |
660 | * buf: C string containing an unsigned | |
661 | * integer value representing the | |
662 | * number of NFSD threads to start | |
663 | * size: non-zero length of C string in @buf | |
664 | * Output: | |
665 | * On success: NFS service is started; | |
666 | * passed-in buffer filled with '\n'-terminated C | |
667 | * string numeric value representing the number of | |
668 | * running NFSD threads; | |
669 | * return code is the size in bytes of the string | |
670 | * On error: return code is zero or a negative errno value | |
671 | */ | |
1da177e4 LT |
672 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
673 | { | |
1da177e4 LT |
674 | char *mesg = buf; |
675 | int rv; | |
676 | if (size > 0) { | |
677 | int newthreads; | |
678 | rv = get_int(&mesg, &newthreads); | |
679 | if (rv) | |
680 | return rv; | |
9e074856 | 681 | if (newthreads < 0) |
1da177e4 | 682 | return -EINVAL; |
9e074856 | 683 | rv = nfsd_svc(NFS_PORT, newthreads); |
1da177e4 LT |
684 | if (rv) |
685 | return rv; | |
686 | } | |
687 | sprintf(buf, "%d\n", nfsd_nrthreads()); | |
688 | return strlen(buf); | |
689 | } | |
690 | ||
262a0982 CL |
691 | /** |
692 | * write_pool_threads - Set or report the current number of threads per pool | |
693 | * | |
694 | * Input: | |
695 | * buf: ignored | |
696 | * size: zero | |
697 | * | |
698 | * OR | |
699 | * | |
700 | * Input: | |
701 | * buf: C string containing whitespace- | |
702 | * separated unsigned integer values | |
703 | * representing the number of NFSD | |
704 | * threads to start in each pool | |
705 | * size: non-zero length of C string in @buf | |
706 | * Output: | |
707 | * On success: passed-in buffer filled with '\n'-terminated C | |
708 | * string containing integer values representing the | |
709 | * number of NFSD threads in each pool; | |
710 | * return code is the size in bytes of the string | |
711 | * On error: return code is zero or a negative errno value | |
712 | */ | |
eed2965a GB |
713 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
714 | { | |
715 | /* if size > 0, look for an array of number of threads per node | |
716 | * and apply them then write out number of threads per node as reply | |
717 | */ | |
718 | char *mesg = buf; | |
719 | int i; | |
720 | int rv; | |
721 | int len; | |
bedbdd8b | 722 | int npools; |
eed2965a GB |
723 | int *nthreads; |
724 | ||
bedbdd8b NB |
725 | mutex_lock(&nfsd_mutex); |
726 | npools = nfsd_nrpools(); | |
eed2965a GB |
727 | if (npools == 0) { |
728 | /* | |
729 | * NFS is shut down. The admin can start it by | |
730 | * writing to the threads file but NOT the pool_threads | |
731 | * file, sorry. Report zero threads. | |
732 | */ | |
bedbdd8b | 733 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
734 | strcpy(buf, "0\n"); |
735 | return strlen(buf); | |
736 | } | |
737 | ||
738 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 739 | rv = -ENOMEM; |
eed2965a | 740 | if (nthreads == NULL) |
bedbdd8b | 741 | goto out_free; |
eed2965a GB |
742 | |
743 | if (size > 0) { | |
744 | for (i = 0; i < npools; i++) { | |
745 | rv = get_int(&mesg, &nthreads[i]); | |
746 | if (rv == -ENOENT) | |
747 | break; /* fewer numbers than pools */ | |
748 | if (rv) | |
749 | goto out_free; /* syntax error */ | |
750 | rv = -EINVAL; | |
751 | if (nthreads[i] < 0) | |
752 | goto out_free; | |
753 | } | |
754 | rv = nfsd_set_nrthreads(i, nthreads); | |
755 | if (rv) | |
756 | goto out_free; | |
757 | } | |
758 | ||
759 | rv = nfsd_get_nrthreads(npools, nthreads); | |
760 | if (rv) | |
761 | goto out_free; | |
762 | ||
763 | mesg = buf; | |
764 | size = SIMPLE_TRANSACTION_LIMIT; | |
765 | for (i = 0; i < npools && size > 0; i++) { | |
766 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
767 | len = strlen(mesg); | |
768 | size -= len; | |
769 | mesg += len; | |
770 | } | |
771 | ||
bedbdd8b | 772 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
773 | return (mesg-buf); |
774 | ||
775 | out_free: | |
776 | kfree(nthreads); | |
bedbdd8b | 777 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
778 | return rv; |
779 | } | |
780 | ||
3dd98a3b | 781 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 782 | { |
70c3b76c N |
783 | char *mesg = buf; |
784 | char *vers, sign; | |
785 | int len, num; | |
786 | ssize_t tlen = 0; | |
787 | char *sep; | |
788 | ||
789 | if (size>0) { | |
790 | if (nfsd_serv) | |
6658d3a7 N |
791 | /* Cannot change versions without updating |
792 | * nfsd_serv->sv_xdrsize, and reallocing | |
793 | * rq_argp and rq_resp | |
794 | */ | |
70c3b76c N |
795 | return -EBUSY; |
796 | if (buf[size-1] != '\n') | |
797 | return -EINVAL; | |
798 | buf[size-1] = 0; | |
799 | ||
800 | vers = mesg; | |
801 | len = qword_get(&mesg, vers, size); | |
802 | if (len <= 0) return -EINVAL; | |
803 | do { | |
804 | sign = *vers; | |
805 | if (sign == '+' || sign == '-') | |
806 | num = simple_strtol((vers+1), NULL, 0); | |
807 | else | |
808 | num = simple_strtol(vers, NULL, 0); | |
809 | switch(num) { | |
810 | case 2: | |
811 | case 3: | |
812 | case 4: | |
6658d3a7 | 813 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
814 | break; |
815 | default: | |
816 | return -EINVAL; | |
817 | } | |
818 | vers += len + 1; | |
819 | tlen += len; | |
820 | } while ((len = qword_get(&mesg, vers, size)) > 0); | |
821 | /* If all get turned off, turn them back on, as | |
822 | * having no versions is BAD | |
823 | */ | |
6658d3a7 | 824 | nfsd_reset_versions(); |
70c3b76c N |
825 | } |
826 | /* Now write current state into reply buffer */ | |
827 | len = 0; | |
828 | sep = ""; | |
829 | for (num=2 ; num <= 4 ; num++) | |
6658d3a7 | 830 | if (nfsd_vers(num, NFSD_AVAIL)) { |
70c3b76c | 831 | len += sprintf(buf+len, "%s%c%d", sep, |
6658d3a7 | 832 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
833 | num); |
834 | sep = " "; | |
835 | } | |
836 | len += sprintf(buf+len, "\n"); | |
837 | return len; | |
838 | } | |
839 | ||
262a0982 CL |
840 | /** |
841 | * write_versions - Set or report the available NFS protocol versions | |
842 | * | |
843 | * Input: | |
844 | * buf: ignored | |
845 | * size: zero | |
846 | * Output: | |
847 | * On success: passed-in buffer filled with '\n'-terminated C | |
848 | * string containing positive or negative integer | |
849 | * values representing the current status of each | |
850 | * protocol version; | |
851 | * return code is the size in bytes of the string | |
852 | * On error: return code is zero or a negative errno value | |
853 | * | |
854 | * OR | |
855 | * | |
856 | * Input: | |
857 | * buf: C string containing whitespace- | |
858 | * separated positive or negative | |
859 | * integer values representing NFS | |
860 | * protocol versions to enable ("+n") | |
861 | * or disable ("-n") | |
862 | * size: non-zero length of C string in @buf | |
863 | * Output: | |
864 | * On success: status of zero or more protocol versions has | |
865 | * been updated; passed-in buffer filled with | |
866 | * '\n'-terminated C string containing positive | |
867 | * or negative integer values representing the | |
868 | * current status of each protocol version; | |
869 | * return code is the size in bytes of the string | |
870 | * On error: return code is zero or a negative errno value | |
871 | */ | |
3dd98a3b JL |
872 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
873 | { | |
874 | ssize_t rv; | |
875 | ||
876 | mutex_lock(&nfsd_mutex); | |
877 | rv = __write_versions(file, buf, size); | |
878 | mutex_unlock(&nfsd_mutex); | |
879 | return rv; | |
880 | } | |
881 | ||
bedbdd8b | 882 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 883 | { |
b41b66d6 N |
884 | if (size == 0) { |
885 | int len = 0; | |
bedbdd8b | 886 | |
b41b66d6 | 887 | if (nfsd_serv) |
9571af18 | 888 | len = svc_xprt_names(nfsd_serv, buf, 0); |
b41b66d6 N |
889 | return len; |
890 | } | |
891 | /* Either a single 'fd' number is written, in which | |
892 | * case it must be for a socket of a supported family/protocol, | |
893 | * and we use it as an nfsd socket, or | |
894 | * A '-' followed by the 'name' of a socket in which case | |
895 | * we close the socket. | |
80212d59 | 896 | */ |
b41b66d6 N |
897 | if (isdigit(buf[0])) { |
898 | char *mesg = buf; | |
899 | int fd; | |
900 | int err; | |
901 | err = get_int(&mesg, &fd); | |
902 | if (err) | |
903 | return -EINVAL; | |
904 | if (fd < 0) | |
905 | return -EINVAL; | |
906 | err = nfsd_create_serv(); | |
907 | if (!err) { | |
29373913 | 908 | err = svc_addsock(nfsd_serv, fd, buf); |
5680c446 | 909 | if (err >= 0) { |
26a41409 | 910 | err = lockd_up(); |
5680c446 N |
911 | if (err < 0) |
912 | svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); | |
3dfb4210 | 913 | } |
b41b66d6 N |
914 | /* Decrease the count, but don't shutdown the |
915 | * the service | |
916 | */ | |
b41b66d6 N |
917 | nfsd_serv->sv_nrthreads--; |
918 | } | |
5680c446 | 919 | return err < 0 ? err : 0; |
b41b66d6 | 920 | } |
a217813f | 921 | if (buf[0] == '-' && isdigit(buf[1])) { |
b41b66d6 N |
922 | char *toclose = kstrdup(buf+1, GFP_KERNEL); |
923 | int len = 0; | |
924 | if (!toclose) | |
925 | return -ENOMEM; | |
b41b66d6 N |
926 | if (nfsd_serv) |
927 | len = svc_sock_names(buf, nfsd_serv, toclose); | |
37a03472 N |
928 | if (len >= 0) |
929 | lockd_down(); | |
b41b66d6 N |
930 | kfree(toclose); |
931 | return len; | |
932 | } | |
a217813f TT |
933 | /* |
934 | * Add a transport listener by writing it's transport name | |
935 | */ | |
936 | if (isalpha(buf[0])) { | |
937 | int err; | |
938 | char transport[16]; | |
939 | int port; | |
940 | if (sscanf(buf, "%15s %4d", transport, &port) == 2) { | |
941 | err = nfsd_create_serv(); | |
942 | if (!err) { | |
943 | err = svc_create_xprt(nfsd_serv, | |
944 | transport, port, | |
945 | SVC_SOCK_ANONYMOUS); | |
946 | if (err == -ENOENT) | |
947 | /* Give a reasonable perror msg for | |
948 | * bad transport string */ | |
949 | err = -EPROTONOSUPPORT; | |
950 | } | |
951 | return err < 0 ? err : 0; | |
952 | } | |
953 | } | |
954 | /* | |
955 | * Remove a transport by writing it's transport name and port number | |
956 | */ | |
957 | if (buf[0] == '-' && isalpha(buf[1])) { | |
958 | struct svc_xprt *xprt; | |
959 | int err = -EINVAL; | |
960 | char transport[16]; | |
961 | int port; | |
962 | if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) { | |
963 | if (port == 0) | |
964 | return -EINVAL; | |
a217813f TT |
965 | if (nfsd_serv) { |
966 | xprt = svc_find_xprt(nfsd_serv, transport, | |
967 | AF_UNSPEC, port); | |
968 | if (xprt) { | |
969 | svc_close_xprt(xprt); | |
970 | svc_xprt_put(xprt); | |
971 | err = 0; | |
972 | } else | |
973 | err = -ENOTCONN; | |
974 | } | |
a217813f TT |
975 | return err < 0 ? err : 0; |
976 | } | |
977 | } | |
b41b66d6 | 978 | return -EINVAL; |
80212d59 N |
979 | } |
980 | ||
262a0982 CL |
981 | /** |
982 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
983 | * | |
984 | * Input: | |
985 | * buf: ignored | |
986 | * size: zero | |
987 | * Output: | |
988 | * On success: passed-in buffer filled with a '\n'-terminated C | |
989 | * string containing a whitespace-separated list of | |
990 | * named NFSD listeners; | |
991 | * return code is the size in bytes of the string | |
992 | * On error: return code is zero or a negative errno value | |
993 | * | |
994 | * OR | |
995 | * | |
996 | * Input: | |
997 | * buf: C string containing an unsigned | |
998 | * integer value representing a bound | |
999 | * but unconnected socket that is to be | |
1000 | * used as an NFSD listener | |
1001 | * size: non-zero length of C string in @buf | |
1002 | * Output: | |
1003 | * On success: NFS service is started; | |
1004 | * passed-in buffer filled with a '\n'-terminated C | |
1005 | * string containing a unique alphanumeric name of | |
1006 | * the listener; | |
1007 | * return code is the size in bytes of the string | |
1008 | * On error: return code is a negative errno value | |
1009 | * | |
1010 | * OR | |
1011 | * | |
1012 | * Input: | |
1013 | * buf: C string containing a "-" followed | |
1014 | * by an integer value representing a | |
1015 | * previously passed in socket file | |
1016 | * descriptor | |
1017 | * size: non-zero length of C string in @buf | |
1018 | * Output: | |
1019 | * On success: NFS service no longer listens on that socket; | |
1020 | * passed-in buffer filled with a '\n'-terminated C | |
1021 | * string containing a unique name of the listener; | |
1022 | * return code is the size in bytes of the string | |
1023 | * On error: return code is a negative errno value | |
1024 | * | |
1025 | * OR | |
1026 | * | |
1027 | * Input: | |
1028 | * buf: C string containing a transport | |
1029 | * name and an unsigned integer value | |
1030 | * representing the port to listen on, | |
1031 | * separated by whitespace | |
1032 | * size: non-zero length of C string in @buf | |
1033 | * Output: | |
1034 | * On success: returns zero; NFS service is started | |
1035 | * On error: return code is a negative errno value | |
1036 | * | |
1037 | * OR | |
1038 | * | |
1039 | * Input: | |
1040 | * buf: C string containing a "-" followed | |
1041 | * by a transport name and an unsigned | |
1042 | * integer value representing the port | |
1043 | * to listen on, separated by whitespace | |
1044 | * size: non-zero length of C string in @buf | |
1045 | * Output: | |
1046 | * On success: returns zero; NFS service no longer listens | |
1047 | * on that transport | |
1048 | * On error: return code is a negative errno value | |
1049 | */ | |
bedbdd8b NB |
1050 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
1051 | { | |
1052 | ssize_t rv; | |
3dd98a3b | 1053 | |
bedbdd8b NB |
1054 | mutex_lock(&nfsd_mutex); |
1055 | rv = __write_ports(file, buf, size); | |
1056 | mutex_unlock(&nfsd_mutex); | |
1057 | return rv; | |
1058 | } | |
1059 | ||
1060 | ||
596bbe53 N |
1061 | int nfsd_max_blksize; |
1062 | ||
262a0982 CL |
1063 | /** |
1064 | * write_maxblksize - Set or report the current NFS blksize | |
1065 | * | |
1066 | * Input: | |
1067 | * buf: ignored | |
1068 | * size: zero | |
1069 | * | |
1070 | * OR | |
1071 | * | |
1072 | * Input: | |
1073 | * buf: C string containing an unsigned | |
1074 | * integer value representing the new | |
1075 | * NFS blksize | |
1076 | * size: non-zero length of C string in @buf | |
1077 | * Output: | |
1078 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1079 | * containing numeric value of the current NFS blksize | |
1080 | * setting; | |
1081 | * return code is the size in bytes of the string | |
1082 | * On error: return code is zero or a negative errno value | |
1083 | */ | |
596bbe53 N |
1084 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
1085 | { | |
1086 | char *mesg = buf; | |
1087 | if (size > 0) { | |
1088 | int bsize; | |
1089 | int rv = get_int(&mesg, &bsize); | |
1090 | if (rv) | |
1091 | return rv; | |
1092 | /* force bsize into allowed range and | |
1093 | * required alignment. | |
1094 | */ | |
1095 | if (bsize < 1024) | |
1096 | bsize = 1024; | |
1097 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1098 | bsize = NFSSVC_MAXBLKSIZE; | |
1099 | bsize &= ~(1024-1); | |
bedbdd8b | 1100 | mutex_lock(&nfsd_mutex); |
596bbe53 | 1101 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
bedbdd8b | 1102 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1103 | return -EBUSY; |
1104 | } | |
1105 | nfsd_max_blksize = bsize; | |
bedbdd8b | 1106 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1107 | } |
1108 | return sprintf(buf, "%d\n", nfsd_max_blksize); | |
1109 | } | |
1110 | ||
70c3b76c | 1111 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
1112 | extern time_t nfs4_leasetime(void); |
1113 | ||
3dd98a3b | 1114 | static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) |
1da177e4 LT |
1115 | { |
1116 | /* if size > 10 seconds, call | |
1117 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
1118 | */ | |
1119 | char *mesg = buf; | |
3dd98a3b | 1120 | int rv, lease; |
1da177e4 LT |
1121 | |
1122 | if (size > 0) { | |
3dd98a3b JL |
1123 | if (nfsd_serv) |
1124 | return -EBUSY; | |
1da177e4 LT |
1125 | rv = get_int(&mesg, &lease); |
1126 | if (rv) | |
1127 | return rv; | |
1128 | if (lease < 10 || lease > 3600) | |
1129 | return -EINVAL; | |
1130 | nfs4_reset_lease(lease); | |
1131 | } | |
1132 | sprintf(buf, "%ld\n", nfs4_lease_time()); | |
1133 | return strlen(buf); | |
1134 | } | |
1135 | ||
262a0982 CL |
1136 | /** |
1137 | * write_leasetime - Set or report the current NFSv4 lease time | |
1138 | * | |
1139 | * Input: | |
1140 | * buf: ignored | |
1141 | * size: zero | |
1142 | * | |
1143 | * OR | |
1144 | * | |
1145 | * Input: | |
1146 | * buf: C string containing an unsigned | |
1147 | * integer value representing the new | |
1148 | * NFSv4 lease expiry time | |
1149 | * size: non-zero length of C string in @buf | |
1150 | * Output: | |
1151 | * On success: passed-in buffer filled with '\n'-terminated C | |
1152 | * string containing unsigned integer value of the | |
1153 | * current lease expiry time; | |
1154 | * return code is the size in bytes of the string | |
1155 | * On error: return code is zero or a negative errno value | |
1156 | */ | |
3dd98a3b JL |
1157 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1158 | { | |
1159 | ssize_t rv; | |
1160 | ||
1161 | mutex_lock(&nfsd_mutex); | |
1162 | rv = __write_leasetime(file, buf, size); | |
1163 | mutex_unlock(&nfsd_mutex); | |
1164 | return rv; | |
1165 | } | |
1166 | ||
1167 | extern char *nfs4_recoverydir(void); | |
1168 | ||
1169 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
1170 | { |
1171 | char *mesg = buf; | |
1172 | char *recdir; | |
1173 | int len, status; | |
1174 | ||
3dd98a3b JL |
1175 | if (size > 0) { |
1176 | if (nfsd_serv) | |
1177 | return -EBUSY; | |
1178 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1179 | return -EINVAL; | |
1180 | buf[size-1] = 0; | |
0964a3d3 | 1181 | |
3dd98a3b JL |
1182 | recdir = mesg; |
1183 | len = qword_get(&mesg, recdir, size); | |
1184 | if (len <= 0) | |
1185 | return -EINVAL; | |
0964a3d3 | 1186 | |
3dd98a3b JL |
1187 | status = nfs4_reset_recoverydir(recdir); |
1188 | } | |
1189 | sprintf(buf, "%s\n", nfs4_recoverydir()); | |
0964a3d3 N |
1190 | return strlen(buf); |
1191 | } | |
3dd98a3b | 1192 | |
262a0982 CL |
1193 | /** |
1194 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1195 | * | |
1196 | * Input: | |
1197 | * buf: ignored | |
1198 | * size: zero | |
1199 | * | |
1200 | * OR | |
1201 | * | |
1202 | * Input: | |
1203 | * buf: C string containing the pathname | |
1204 | * of the directory on a local file | |
1205 | * system containing permanent NFSv4 | |
1206 | * recovery data | |
1207 | * size: non-zero length of C string in @buf | |
1208 | * Output: | |
1209 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1210 | * containing the current recovery pathname setting; | |
1211 | * return code is the size in bytes of the string | |
1212 | * On error: return code is zero or a negative errno value | |
1213 | */ | |
3dd98a3b JL |
1214 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1215 | { | |
1216 | ssize_t rv; | |
1217 | ||
1218 | mutex_lock(&nfsd_mutex); | |
1219 | rv = __write_recoverydir(file, buf, size); | |
1220 | mutex_unlock(&nfsd_mutex); | |
1221 | return rv; | |
1222 | } | |
1223 | ||
70c3b76c | 1224 | #endif |
0964a3d3 | 1225 | |
1da177e4 LT |
1226 | /*----------------------------------------------------------------------------*/ |
1227 | /* | |
1228 | * populating the filesystem. | |
1229 | */ | |
1230 | ||
1231 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1232 | { | |
1233 | static struct tree_descr nfsd_files[] = { | |
1234 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
1235 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1236 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1237 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1238 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1239 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1240 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1241 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
4373ea84 WC |
1242 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1243 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1244 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1245 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1246 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1247 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1248 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
70c3b76c | 1249 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1250 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1251 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1252 | #ifdef CONFIG_NFSD_V4 |
1253 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 1254 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1255 | #endif |
1256 | /* last one */ {""} | |
1257 | }; | |
1258 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1259 | } | |
1260 | ||
454e2398 DH |
1261 | static int nfsd_get_sb(struct file_system_type *fs_type, |
1262 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 1263 | { |
454e2398 | 1264 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
1265 | } |
1266 | ||
1267 | static struct file_system_type nfsd_fs_type = { | |
1268 | .owner = THIS_MODULE, | |
1269 | .name = "nfsd", | |
1270 | .get_sb = nfsd_get_sb, | |
1271 | .kill_sb = kill_litter_super, | |
1272 | }; | |
1273 | ||
e331f606 BF |
1274 | #ifdef CONFIG_PROC_FS |
1275 | static int create_proc_exports_entry(void) | |
1276 | { | |
1277 | struct proc_dir_entry *entry; | |
1278 | ||
1279 | entry = proc_mkdir("fs/nfs", NULL); | |
1280 | if (!entry) | |
1281 | return -ENOMEM; | |
9ef2db26 | 1282 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1283 | if (!entry) |
1284 | return -ENOMEM; | |
e331f606 BF |
1285 | return 0; |
1286 | } | |
1287 | #else /* CONFIG_PROC_FS */ | |
1288 | static int create_proc_exports_entry(void) | |
1289 | { | |
1290 | return 0; | |
1291 | } | |
1292 | #endif | |
1293 | ||
1da177e4 LT |
1294 | static int __init init_nfsd(void) |
1295 | { | |
1296 | int retval; | |
1297 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1298 | ||
e8ff2a84 BF |
1299 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1300 | if (retval) | |
1301 | return retval; | |
1da177e4 | 1302 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1303 | retval = nfsd_reply_cache_init(); |
1304 | if (retval) | |
1305 | goto out_free_stat; | |
dbf847ec BF |
1306 | retval = nfsd_export_init(); |
1307 | if (retval) | |
1308 | goto out_free_cache; | |
1da177e4 | 1309 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1310 | retval = nfsd_idmap_init(); |
1311 | if (retval) | |
1312 | goto out_free_lockd; | |
e331f606 BF |
1313 | retval = create_proc_exports_entry(); |
1314 | if (retval) | |
1315 | goto out_free_idmap; | |
1da177e4 | 1316 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1317 | if (retval) |
1318 | goto out_free_all; | |
1319 | return 0; | |
1320 | out_free_all: | |
26808d3f BF |
1321 | remove_proc_entry("fs/nfs/exports", NULL); |
1322 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1323 | out_free_idmap: |
dbf847ec BF |
1324 | nfsd_idmap_shutdown(); |
1325 | out_free_lockd: | |
26808d3f | 1326 | nfsd_lockd_shutdown(); |
e331f606 | 1327 | nfsd_export_shutdown(); |
dbf847ec | 1328 | out_free_cache: |
e331f606 | 1329 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1330 | out_free_stat: |
1331 | nfsd_stat_shutdown(); | |
26808d3f | 1332 | nfsd4_free_slabs(); |
1da177e4 LT |
1333 | return retval; |
1334 | } | |
1335 | ||
1336 | static void __exit exit_nfsd(void) | |
1337 | { | |
1338 | nfsd_export_shutdown(); | |
d5c3428b | 1339 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1340 | remove_proc_entry("fs/nfs/exports", NULL); |
1341 | remove_proc_entry("fs/nfs", NULL); | |
1342 | nfsd_stat_shutdown(); | |
1343 | nfsd_lockd_shutdown(); | |
1da177e4 | 1344 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1345 | nfsd4_free_slabs(); |
1da177e4 LT |
1346 | unregister_filesystem(&nfsd_fs_type); |
1347 | } | |
1348 | ||
1349 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1350 | MODULE_LICENSE("GPL"); | |
1351 | module_init(init_nfsd) | |
1352 | module_exit(exit_nfsd) |