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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfsctl.c | |
3 | * | |
4 | * Syscall interface to knfsd. | |
5 | * | |
6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/module.h> |
10 | ||
11 | #include <linux/linkage.h> | |
12 | #include <linux/time.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/fs.h> | |
3f8206d4 | 15 | #include <linux/namei.h> |
1da177e4 LT |
16 | #include <linux/fcntl.h> |
17 | #include <linux/net.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/syscalls.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/proc_fs.h> | |
23 | #include <linux/seq_file.h> | |
24 | #include <linux/pagemap.h> | |
25 | #include <linux/init.h> | |
4373ea84 | 26 | #include <linux/inet.h> |
70c3b76c | 27 | #include <linux/string.h> |
b41b66d6 | 28 | #include <linux/ctype.h> |
1da177e4 LT |
29 | |
30 | #include <linux/nfs.h> | |
31 | #include <linux/nfsd_idmap.h> | |
b41b66d6 | 32 | #include <linux/lockd/bind.h> |
1da177e4 | 33 | #include <linux/sunrpc/svc.h> |
80212d59 | 34 | #include <linux/sunrpc/svcsock.h> |
1da177e4 LT |
35 | #include <linux/nfsd/nfsd.h> |
36 | #include <linux/nfsd/cache.h> | |
37 | #include <linux/nfsd/xdr.h> | |
38 | #include <linux/nfsd/syscall.h> | |
4373ea84 | 39 | #include <linux/lockd/lockd.h> |
1da177e4 LT |
40 | |
41 | #include <asm/uaccess.h> | |
f15364bd | 42 | #include <net/ipv6.h> |
1da177e4 LT |
43 | |
44 | /* | |
45 | * We have a single directory with 9 nodes in it. | |
46 | */ | |
47 | enum { | |
48 | NFSD_Root = 1, | |
49 | NFSD_Svc, | |
50 | NFSD_Add, | |
51 | NFSD_Del, | |
52 | NFSD_Export, | |
53 | NFSD_Unexport, | |
54 | NFSD_Getfd, | |
55 | NFSD_Getfs, | |
56 | NFSD_List, | |
57 | NFSD_Fh, | |
4373ea84 | 58 | NFSD_FO_UnlockIP, |
17efa372 | 59 | NFSD_FO_UnlockFS, |
1da177e4 | 60 | NFSD_Threads, |
eed2965a | 61 | NFSD_Pool_Threads, |
03cf6c9f | 62 | NFSD_Pool_Stats, |
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 | ||
03cf6c9f GB |
175 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); |
176 | ||
177 | static struct file_operations pool_stats_operations = { | |
178 | .open = nfsd_pool_stats_open, | |
179 | .read = seq_read, | |
180 | .llseek = seq_lseek, | |
181 | .release = seq_release, | |
182 | .owner = THIS_MODULE, | |
183 | }; | |
184 | ||
1da177e4 LT |
185 | /*----------------------------------------------------------------------------*/ |
186 | /* | |
187 | * payload - write methods | |
1da177e4 LT |
188 | */ |
189 | ||
262a0982 CL |
190 | /** |
191 | * write_svc - Start kernel's NFSD server | |
192 | * | |
193 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
194 | * Function remains to support old versions of nfs-utils. | |
195 | * | |
196 | * Input: | |
197 | * buf: struct nfsctl_svc | |
198 | * svc_port: port number of this | |
199 | * server's listener | |
200 | * svc_nthreads: number of threads to start | |
201 | * size: size in bytes of passed in nfsctl_svc | |
202 | * Output: | |
203 | * On success: returns zero | |
204 | * On error: return code is negative errno value | |
205 | */ | |
1da177e4 LT |
206 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
207 | { | |
208 | struct nfsctl_svc *data; | |
82e12fe9 | 209 | int err; |
1da177e4 LT |
210 | if (size < sizeof(*data)) |
211 | return -EINVAL; | |
212 | data = (struct nfsctl_svc*) buf; | |
82e12fe9 N |
213 | err = nfsd_svc(data->svc_port, data->svc_nthreads); |
214 | if (err < 0) | |
215 | return err; | |
216 | return 0; | |
1da177e4 LT |
217 | } |
218 | ||
262a0982 CL |
219 | /** |
220 | * write_add - Add or modify client entry in auth unix cache | |
221 | * | |
222 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
223 | * Function remains to support old versions of nfs-utils. | |
224 | * | |
225 | * Input: | |
226 | * buf: struct nfsctl_client | |
227 | * cl_ident: '\0'-terminated C string | |
228 | * containing domain name | |
229 | * of client | |
230 | * cl_naddr: no. of items in cl_addrlist | |
231 | * cl_addrlist: array of client addresses | |
232 | * cl_fhkeytype: ignored | |
233 | * cl_fhkeylen: ignored | |
234 | * cl_fhkey: ignored | |
235 | * size: size in bytes of passed in nfsctl_client | |
236 | * Output: | |
237 | * On success: returns zero | |
238 | * On error: return code is negative errno value | |
239 | * | |
240 | * Note: Only AF_INET client addresses are passed in, since | |
241 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
242 | */ | |
1da177e4 LT |
243 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
244 | { | |
245 | struct nfsctl_client *data; | |
246 | if (size < sizeof(*data)) | |
247 | return -EINVAL; | |
248 | data = (struct nfsctl_client *)buf; | |
249 | return exp_addclient(data); | |
250 | } | |
251 | ||
262a0982 CL |
252 | /** |
253 | * write_del - Remove client from auth unix cache | |
254 | * | |
255 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
256 | * Function remains to support old versions of nfs-utils. | |
257 | * | |
258 | * Input: | |
259 | * buf: struct nfsctl_client | |
260 | * cl_ident: '\0'-terminated C string | |
261 | * containing domain name | |
262 | * of client | |
263 | * cl_naddr: ignored | |
264 | * cl_addrlist: ignored | |
265 | * cl_fhkeytype: ignored | |
266 | * cl_fhkeylen: ignored | |
267 | * cl_fhkey: ignored | |
268 | * size: size in bytes of passed in nfsctl_client | |
269 | * Output: | |
270 | * On success: returns zero | |
271 | * On error: return code is negative errno value | |
272 | * | |
273 | * Note: Only AF_INET client addresses are passed in, since | |
274 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
275 | */ | |
1da177e4 LT |
276 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
277 | { | |
278 | struct nfsctl_client *data; | |
279 | if (size < sizeof(*data)) | |
280 | return -EINVAL; | |
281 | data = (struct nfsctl_client *)buf; | |
282 | return exp_delclient(data); | |
283 | } | |
284 | ||
262a0982 CL |
285 | /** |
286 | * write_export - Export part or all of a local file system | |
287 | * | |
288 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
289 | * Function remains to support old versions of nfs-utils. | |
290 | * | |
291 | * Input: | |
292 | * buf: struct nfsctl_export | |
293 | * ex_client: '\0'-terminated C string | |
294 | * containing domain name | |
295 | * of client allowed to access | |
296 | * this export | |
297 | * ex_path: '\0'-terminated C string | |
298 | * containing pathname of | |
299 | * directory in local file system | |
300 | * ex_dev: fsid to use for this export | |
301 | * ex_ino: ignored | |
302 | * ex_flags: export flags for this export | |
303 | * ex_anon_uid: UID to use for anonymous | |
304 | * requests | |
305 | * ex_anon_gid: GID to use for anonymous | |
306 | * requests | |
307 | * size: size in bytes of passed in nfsctl_export | |
308 | * Output: | |
309 | * On success: returns zero | |
310 | * On error: return code is negative errno value | |
311 | */ | |
1da177e4 LT |
312 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
313 | { | |
314 | struct nfsctl_export *data; | |
315 | if (size < sizeof(*data)) | |
316 | return -EINVAL; | |
317 | data = (struct nfsctl_export*)buf; | |
318 | return exp_export(data); | |
319 | } | |
320 | ||
262a0982 CL |
321 | /** |
322 | * write_unexport - Unexport a previously exported file system | |
323 | * | |
324 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
325 | * Function remains to support old versions of nfs-utils. | |
326 | * | |
327 | * Input: | |
328 | * buf: struct nfsctl_export | |
329 | * ex_client: '\0'-terminated C string | |
330 | * containing domain name | |
331 | * of client no longer allowed | |
332 | * to access this export | |
333 | * ex_path: '\0'-terminated C string | |
334 | * containing pathname of | |
335 | * directory in local file system | |
336 | * ex_dev: ignored | |
337 | * ex_ino: ignored | |
338 | * ex_flags: ignored | |
339 | * ex_anon_uid: ignored | |
340 | * ex_anon_gid: ignored | |
341 | * size: size in bytes of passed in nfsctl_export | |
342 | * Output: | |
343 | * On success: returns zero | |
344 | * On error: return code is negative errno value | |
345 | */ | |
1da177e4 LT |
346 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
347 | { | |
348 | struct nfsctl_export *data; | |
349 | ||
350 | if (size < sizeof(*data)) | |
351 | return -EINVAL; | |
352 | data = (struct nfsctl_export*)buf; | |
353 | return exp_unexport(data); | |
354 | } | |
355 | ||
262a0982 CL |
356 | /** |
357 | * write_getfs - Get a variable-length NFS file handle by path | |
358 | * | |
359 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
360 | * Function remains to support old versions of nfs-utils. | |
361 | * | |
362 | * Input: | |
363 | * buf: struct nfsctl_fsparm | |
364 | * gd_addr: socket address of client | |
365 | * gd_path: '\0'-terminated C string | |
366 | * containing pathname of | |
367 | * directory in local file system | |
368 | * gd_maxlen: maximum size of returned file | |
369 | * handle | |
370 | * size: size in bytes of passed in nfsctl_fsparm | |
371 | * Output: | |
372 | * On success: passed-in buffer filled with a knfsd_fh structure | |
373 | * (a variable-length raw NFS file handle); | |
374 | * return code is the size in bytes of the file handle | |
375 | * On error: return code is negative errno value | |
376 | * | |
377 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
378 | * is the same size as a struct sockaddr_in. | |
379 | */ | |
1da177e4 LT |
380 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
381 | { | |
382 | struct nfsctl_fsparm *data; | |
383 | struct sockaddr_in *sin; | |
384 | struct auth_domain *clp; | |
385 | int err = 0; | |
386 | struct knfsd_fh *res; | |
f15364bd | 387 | struct in6_addr in6; |
1da177e4 LT |
388 | |
389 | if (size < sizeof(*data)) | |
390 | return -EINVAL; | |
391 | data = (struct nfsctl_fsparm*)buf; | |
392 | err = -EPROTONOSUPPORT; | |
393 | if (data->gd_addr.sa_family != AF_INET) | |
394 | goto out; | |
395 | sin = (struct sockaddr_in *)&data->gd_addr; | |
396 | if (data->gd_maxlen > NFS3_FHSIZE) | |
397 | data->gd_maxlen = NFS3_FHSIZE; | |
398 | ||
399 | res = (struct knfsd_fh*)buf; | |
400 | ||
401 | exp_readlock(); | |
f15364bd AC |
402 | |
403 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
404 | ||
405 | clp = auth_unix_lookup(&in6); | |
406 | if (!clp) | |
1da177e4 LT |
407 | err = -EPERM; |
408 | else { | |
409 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
410 | auth_domain_put(clp); | |
411 | } | |
412 | exp_readunlock(); | |
413 | if (err == 0) | |
12127498 | 414 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
415 | out: |
416 | return err; | |
417 | } | |
418 | ||
262a0982 CL |
419 | /** |
420 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
421 | * | |
422 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
423 | * Function remains to support old versions of nfs-utils. | |
424 | * | |
425 | * Input: | |
426 | * buf: struct nfsctl_fdparm | |
427 | * gd_addr: socket address of client | |
428 | * gd_path: '\0'-terminated C string | |
429 | * containing pathname of | |
430 | * directory in local file system | |
431 | * gd_version: fdparm structure version | |
432 | * size: size in bytes of passed in nfsctl_fdparm | |
433 | * Output: | |
434 | * On success: passed-in buffer filled with nfsctl_res | |
435 | * (a fixed-length raw NFS file handle); | |
436 | * return code is the size in bytes of the file handle | |
437 | * On error: return code is negative errno value | |
438 | * | |
439 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
440 | * is the same size as a struct sockaddr_in. | |
441 | */ | |
1da177e4 LT |
442 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
443 | { | |
444 | struct nfsctl_fdparm *data; | |
445 | struct sockaddr_in *sin; | |
446 | struct auth_domain *clp; | |
447 | int err = 0; | |
448 | struct knfsd_fh fh; | |
449 | char *res; | |
f15364bd | 450 | struct in6_addr in6; |
1da177e4 LT |
451 | |
452 | if (size < sizeof(*data)) | |
453 | return -EINVAL; | |
454 | data = (struct nfsctl_fdparm*)buf; | |
455 | err = -EPROTONOSUPPORT; | |
456 | if (data->gd_addr.sa_family != AF_INET) | |
457 | goto out; | |
458 | err = -EINVAL; | |
459 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
460 | goto out; | |
461 | ||
462 | res = buf; | |
463 | sin = (struct sockaddr_in *)&data->gd_addr; | |
464 | exp_readlock(); | |
f15364bd AC |
465 | |
466 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
467 | ||
468 | clp = auth_unix_lookup(&in6); | |
469 | if (!clp) | |
1da177e4 LT |
470 | err = -EPERM; |
471 | else { | |
472 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
473 | auth_domain_put(clp); | |
474 | } | |
475 | exp_readunlock(); | |
476 | ||
477 | if (err == 0) { | |
478 | memset(res,0, NFS_FHSIZE); | |
479 | memcpy(res, &fh.fh_base, fh.fh_size); | |
480 | err = NFS_FHSIZE; | |
481 | } | |
482 | out: | |
483 | return err; | |
484 | } | |
485 | ||
262a0982 CL |
486 | /** |
487 | * write_unlock_ip - Release all locks used by a client | |
488 | * | |
489 | * Experimental. | |
490 | * | |
491 | * Input: | |
492 | * buf: '\n'-terminated C string containing a | |
493 | * presentation format IPv4 address | |
494 | * size: length of C string in @buf | |
495 | * Output: | |
496 | * On success: returns zero if all specified locks were released; | |
497 | * returns one if one or more locks were not released | |
498 | * On error: return code is negative errno value | |
499 | * | |
500 | * Note: Only AF_INET client addresses are passed in | |
501 | */ | |
b046ccdc | 502 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 503 | { |
367c8c7b CL |
504 | struct sockaddr_in sin = { |
505 | .sin_family = AF_INET, | |
506 | }; | |
4373ea84 | 507 | int b1, b2, b3, b4; |
367c8c7b CL |
508 | char c; |
509 | char *fo_path; | |
4373ea84 WC |
510 | |
511 | /* sanity check */ | |
512 | if (size == 0) | |
513 | return -EINVAL; | |
514 | ||
515 | if (buf[size-1] != '\n') | |
516 | return -EINVAL; | |
517 | ||
518 | fo_path = buf; | |
519 | if (qword_get(&buf, fo_path, size) < 0) | |
520 | return -EINVAL; | |
521 | ||
522 | /* get ipv4 address */ | |
be859405 | 523 | if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) |
367c8c7b CL |
524 | return -EINVAL; |
525 | if (b1 > 255 || b2 > 255 || b3 > 255 || b4 > 255) | |
4373ea84 | 526 | return -EINVAL; |
367c8c7b | 527 | sin.sin_addr.s_addr = htonl((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); |
4373ea84 | 528 | |
367c8c7b | 529 | return nlmsvc_unlock_all_by_ip((struct sockaddr *)&sin); |
4373ea84 WC |
530 | } |
531 | ||
262a0982 CL |
532 | /** |
533 | * write_unlock_fs - Release all locks on a local file system | |
534 | * | |
535 | * Experimental. | |
536 | * | |
537 | * Input: | |
538 | * buf: '\n'-terminated C string containing the | |
539 | * absolute pathname of a local file system | |
540 | * size: length of C string in @buf | |
541 | * Output: | |
542 | * On success: returns zero if all specified locks were released; | |
543 | * returns one if one or more locks were not released | |
544 | * On error: return code is negative errno value | |
545 | */ | |
b046ccdc | 546 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 547 | { |
a63bb996 | 548 | struct path path; |
17efa372 WC |
549 | char *fo_path; |
550 | int error; | |
551 | ||
552 | /* sanity check */ | |
553 | if (size == 0) | |
554 | return -EINVAL; | |
555 | ||
556 | if (buf[size-1] != '\n') | |
557 | return -EINVAL; | |
558 | ||
559 | fo_path = buf; | |
560 | if (qword_get(&buf, fo_path, size) < 0) | |
561 | return -EINVAL; | |
562 | ||
a63bb996 | 563 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
564 | if (error) |
565 | return error; | |
566 | ||
262a0982 CL |
567 | /* |
568 | * XXX: Needs better sanity checking. Otherwise we could end up | |
569 | * releasing locks on the wrong file system. | |
570 | * | |
571 | * For example: | |
572 | * 1. Does the path refer to a directory? | |
573 | * 2. Is that directory a mount point, or | |
574 | * 3. Is that directory the root of an exported file system? | |
575 | */ | |
a63bb996 | 576 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 577 | |
a63bb996 | 578 | path_put(&path); |
17efa372 WC |
579 | return error; |
580 | } | |
581 | ||
262a0982 CL |
582 | /** |
583 | * write_filehandle - Get a variable-length NFS file handle by path | |
584 | * | |
585 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
586 | * three alphanumeric words separated by whitespace. The string may | |
587 | * contain escape sequences. | |
588 | * | |
589 | * Input: | |
590 | * buf: | |
591 | * domain: client domain name | |
592 | * path: export pathname | |
593 | * maxsize: numeric maximum size of | |
594 | * @buf | |
595 | * size: length of C string in @buf | |
596 | * Output: | |
597 | * On success: passed-in buffer filled with '\n'-terminated C | |
598 | * string containing a ASCII hex text version | |
599 | * of the NFS file handle; | |
600 | * return code is the size in bytes of the string | |
601 | * On error: return code is negative errno value | |
602 | */ | |
1da177e4 LT |
603 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
604 | { | |
1da177e4 | 605 | char *dname, *path; |
246d95ba | 606 | int uninitialized_var(maxsize); |
1da177e4 LT |
607 | char *mesg = buf; |
608 | int len; | |
609 | struct auth_domain *dom; | |
610 | struct knfsd_fh fh; | |
611 | ||
87d26ea7 BF |
612 | if (size == 0) |
613 | return -EINVAL; | |
614 | ||
1da177e4 LT |
615 | if (buf[size-1] != '\n') |
616 | return -EINVAL; | |
617 | buf[size-1] = 0; | |
618 | ||
619 | dname = mesg; | |
620 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
621 | if (len <= 0) |
622 | return -EINVAL; | |
1da177e4 LT |
623 | |
624 | path = dname+len+1; | |
625 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
626 | if (len <= 0) |
627 | return -EINVAL; | |
1da177e4 LT |
628 | |
629 | len = get_int(&mesg, &maxsize); | |
630 | if (len) | |
631 | return len; | |
632 | ||
633 | if (maxsize < NFS_FHSIZE) | |
634 | return -EINVAL; | |
635 | if (maxsize > NFS3_FHSIZE) | |
636 | maxsize = NFS3_FHSIZE; | |
637 | ||
638 | if (qword_get(&mesg, mesg, size)>0) | |
639 | return -EINVAL; | |
640 | ||
641 | /* we have all the words, they are in buf.. */ | |
642 | dom = unix_domain_find(dname); | |
643 | if (!dom) | |
644 | return -ENOMEM; | |
645 | ||
646 | len = exp_rootfh(dom, path, &fh, maxsize); | |
647 | auth_domain_put(dom); | |
648 | if (len) | |
649 | return len; | |
650 | ||
54224f04 CL |
651 | mesg = buf; |
652 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
653 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
654 | mesg[-1] = '\n'; | |
655 | return mesg - buf; | |
656 | } | |
657 | ||
262a0982 CL |
658 | /** |
659 | * write_threads - Start NFSD, or report the current number of running threads | |
660 | * | |
661 | * Input: | |
662 | * buf: ignored | |
663 | * size: zero | |
664 | * Output: | |
665 | * On success: passed-in buffer filled with '\n'-terminated C | |
666 | * string numeric value representing the number of | |
667 | * running NFSD threads; | |
668 | * return code is the size in bytes of the string | |
669 | * On error: return code is zero | |
670 | * | |
671 | * OR | |
672 | * | |
673 | * Input: | |
674 | * buf: C string containing an unsigned | |
675 | * integer value representing the | |
676 | * number of NFSD threads to start | |
677 | * size: non-zero length of C string in @buf | |
678 | * Output: | |
679 | * On success: NFS service is started; | |
680 | * passed-in buffer filled with '\n'-terminated C | |
681 | * string numeric value representing the number of | |
682 | * running NFSD threads; | |
683 | * return code is the size in bytes of the string | |
684 | * On error: return code is zero or a negative errno value | |
685 | */ | |
1da177e4 LT |
686 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
687 | { | |
1da177e4 LT |
688 | char *mesg = buf; |
689 | int rv; | |
690 | if (size > 0) { | |
691 | int newthreads; | |
692 | rv = get_int(&mesg, &newthreads); | |
693 | if (rv) | |
694 | return rv; | |
9e074856 | 695 | if (newthreads < 0) |
1da177e4 | 696 | return -EINVAL; |
9e074856 | 697 | rv = nfsd_svc(NFS_PORT, newthreads); |
82e12fe9 | 698 | if (rv < 0) |
1da177e4 | 699 | return rv; |
82e12fe9 N |
700 | } else |
701 | rv = nfsd_nrthreads(); | |
e06b6405 | 702 | |
82e12fe9 | 703 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
704 | } |
705 | ||
262a0982 CL |
706 | /** |
707 | * write_pool_threads - Set or report the current number of threads per pool | |
708 | * | |
709 | * Input: | |
710 | * buf: ignored | |
711 | * size: zero | |
712 | * | |
713 | * OR | |
714 | * | |
715 | * Input: | |
716 | * buf: C string containing whitespace- | |
717 | * separated unsigned integer values | |
718 | * representing the number of NFSD | |
719 | * threads to start in each pool | |
720 | * size: non-zero length of C string in @buf | |
721 | * Output: | |
722 | * On success: passed-in buffer filled with '\n'-terminated C | |
723 | * string containing integer values representing the | |
724 | * number of NFSD threads in each pool; | |
725 | * return code is the size in bytes of the string | |
726 | * On error: return code is zero or a negative errno value | |
727 | */ | |
eed2965a GB |
728 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
729 | { | |
730 | /* if size > 0, look for an array of number of threads per node | |
731 | * and apply them then write out number of threads per node as reply | |
732 | */ | |
733 | char *mesg = buf; | |
734 | int i; | |
735 | int rv; | |
736 | int len; | |
bedbdd8b | 737 | int npools; |
eed2965a GB |
738 | int *nthreads; |
739 | ||
bedbdd8b NB |
740 | mutex_lock(&nfsd_mutex); |
741 | npools = nfsd_nrpools(); | |
eed2965a GB |
742 | if (npools == 0) { |
743 | /* | |
744 | * NFS is shut down. The admin can start it by | |
745 | * writing to the threads file but NOT the pool_threads | |
746 | * file, sorry. Report zero threads. | |
747 | */ | |
bedbdd8b | 748 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
749 | strcpy(buf, "0\n"); |
750 | return strlen(buf); | |
751 | } | |
752 | ||
753 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 754 | rv = -ENOMEM; |
eed2965a | 755 | if (nthreads == NULL) |
bedbdd8b | 756 | goto out_free; |
eed2965a GB |
757 | |
758 | if (size > 0) { | |
759 | for (i = 0; i < npools; i++) { | |
760 | rv = get_int(&mesg, &nthreads[i]); | |
761 | if (rv == -ENOENT) | |
762 | break; /* fewer numbers than pools */ | |
763 | if (rv) | |
764 | goto out_free; /* syntax error */ | |
765 | rv = -EINVAL; | |
766 | if (nthreads[i] < 0) | |
767 | goto out_free; | |
768 | } | |
769 | rv = nfsd_set_nrthreads(i, nthreads); | |
770 | if (rv) | |
771 | goto out_free; | |
772 | } | |
773 | ||
774 | rv = nfsd_get_nrthreads(npools, nthreads); | |
775 | if (rv) | |
776 | goto out_free; | |
777 | ||
778 | mesg = buf; | |
779 | size = SIMPLE_TRANSACTION_LIMIT; | |
780 | for (i = 0; i < npools && size > 0; i++) { | |
781 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
782 | len = strlen(mesg); | |
783 | size -= len; | |
784 | mesg += len; | |
785 | } | |
786 | ||
bedbdd8b | 787 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
788 | return (mesg-buf); |
789 | ||
790 | out_free: | |
791 | kfree(nthreads); | |
bedbdd8b | 792 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
793 | return rv; |
794 | } | |
795 | ||
3dd98a3b | 796 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 797 | { |
70c3b76c | 798 | char *mesg = buf; |
8daf220a | 799 | char *vers, *minorp, sign; |
261758b5 | 800 | int len, num, remaining; |
8daf220a | 801 | unsigned minor; |
70c3b76c N |
802 | ssize_t tlen = 0; |
803 | char *sep; | |
804 | ||
805 | if (size>0) { | |
806 | if (nfsd_serv) | |
6658d3a7 N |
807 | /* Cannot change versions without updating |
808 | * nfsd_serv->sv_xdrsize, and reallocing | |
809 | * rq_argp and rq_resp | |
810 | */ | |
70c3b76c N |
811 | return -EBUSY; |
812 | if (buf[size-1] != '\n') | |
813 | return -EINVAL; | |
814 | buf[size-1] = 0; | |
815 | ||
816 | vers = mesg; | |
817 | len = qword_get(&mesg, vers, size); | |
818 | if (len <= 0) return -EINVAL; | |
819 | do { | |
820 | sign = *vers; | |
821 | if (sign == '+' || sign == '-') | |
8daf220a | 822 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 823 | else |
8daf220a BH |
824 | num = simple_strtol(vers, &minorp, 0); |
825 | if (*minorp == '.') { | |
826 | if (num < 4) | |
827 | return -EINVAL; | |
828 | minor = simple_strtoul(minorp+1, NULL, 0); | |
829 | if (minor == 0) | |
830 | return -EINVAL; | |
831 | if (nfsd_minorversion(minor, sign == '-' ? | |
832 | NFSD_CLEAR : NFSD_SET) < 0) | |
833 | return -EINVAL; | |
834 | goto next; | |
835 | } | |
70c3b76c N |
836 | switch(num) { |
837 | case 2: | |
838 | case 3: | |
839 | case 4: | |
6658d3a7 | 840 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
841 | break; |
842 | default: | |
843 | return -EINVAL; | |
844 | } | |
8daf220a | 845 | next: |
70c3b76c | 846 | vers += len + 1; |
70c3b76c N |
847 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
848 | /* If all get turned off, turn them back on, as | |
849 | * having no versions is BAD | |
850 | */ | |
6658d3a7 | 851 | nfsd_reset_versions(); |
70c3b76c | 852 | } |
261758b5 | 853 | |
70c3b76c N |
854 | /* Now write current state into reply buffer */ |
855 | len = 0; | |
856 | sep = ""; | |
261758b5 | 857 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 858 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 859 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 860 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 861 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
862 | num); |
863 | sep = " "; | |
261758b5 CL |
864 | |
865 | if (len > remaining) | |
866 | break; | |
867 | remaining -= len; | |
868 | buf += len; | |
869 | tlen += len; | |
70c3b76c | 870 | } |
8daf220a | 871 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
872 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
873 | minor++) { | |
874 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
875 | (nfsd_vers(4, NFSD_TEST) && |
876 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
877 | '+' : '-', | |
878 | minor); | |
261758b5 CL |
879 | |
880 | if (len > remaining) | |
881 | break; | |
882 | remaining -= len; | |
883 | buf += len; | |
884 | tlen += len; | |
885 | } | |
886 | ||
887 | len = snprintf(buf, remaining, "\n"); | |
888 | if (len > remaining) | |
889 | return -EINVAL; | |
890 | return tlen + len; | |
70c3b76c N |
891 | } |
892 | ||
262a0982 CL |
893 | /** |
894 | * write_versions - Set or report the available NFS protocol versions | |
895 | * | |
896 | * Input: | |
897 | * buf: ignored | |
898 | * size: zero | |
899 | * Output: | |
900 | * On success: passed-in buffer filled with '\n'-terminated C | |
901 | * string containing positive or negative integer | |
902 | * values representing the current status of each | |
903 | * protocol version; | |
904 | * return code is the size in bytes of the string | |
905 | * On error: return code is zero or a negative errno value | |
906 | * | |
907 | * OR | |
908 | * | |
909 | * Input: | |
910 | * buf: C string containing whitespace- | |
911 | * separated positive or negative | |
912 | * integer values representing NFS | |
913 | * protocol versions to enable ("+n") | |
914 | * or disable ("-n") | |
915 | * size: non-zero length of C string in @buf | |
916 | * Output: | |
917 | * On success: status of zero or more protocol versions has | |
918 | * been updated; passed-in buffer filled with | |
919 | * '\n'-terminated C string containing positive | |
920 | * or negative integer values representing the | |
921 | * current status of each protocol version; | |
922 | * return code is the size in bytes of the string | |
923 | * On error: return code is zero or a negative errno value | |
924 | */ | |
3dd98a3b JL |
925 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
926 | { | |
927 | ssize_t rv; | |
928 | ||
929 | mutex_lock(&nfsd_mutex); | |
930 | rv = __write_versions(file, buf, size); | |
931 | mutex_unlock(&nfsd_mutex); | |
932 | return rv; | |
933 | } | |
934 | ||
0a5372d8 CL |
935 | /* |
936 | * Zero-length write. Return a list of NFSD's current listener | |
937 | * transports. | |
938 | */ | |
939 | static ssize_t __write_ports_names(char *buf) | |
940 | { | |
941 | if (nfsd_serv == NULL) | |
942 | return 0; | |
335c54bd | 943 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
944 | } |
945 | ||
0b7c2f6f CL |
946 | /* |
947 | * A single 'fd' number was written, in which case it must be for | |
948 | * a socket of a supported family/protocol, and we use it as an | |
949 | * nfsd listener. | |
950 | */ | |
951 | static ssize_t __write_ports_addfd(char *buf) | |
952 | { | |
953 | char *mesg = buf; | |
954 | int fd, err; | |
955 | ||
956 | err = get_int(&mesg, &fd); | |
957 | if (err != 0 || fd < 0) | |
958 | return -EINVAL; | |
959 | ||
960 | err = nfsd_create_serv(); | |
961 | if (err != 0) | |
962 | return err; | |
963 | ||
ea068bad CL |
964 | err = lockd_up(); |
965 | if (err != 0) | |
966 | goto out; | |
0b7c2f6f | 967 | |
bfba9ab4 | 968 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
ea068bad CL |
969 | if (err < 0) |
970 | lockd_down(); | |
0b7c2f6f | 971 | |
ea068bad CL |
972 | out: |
973 | /* Decrease the count, but don't shut down the service */ | |
974 | nfsd_serv->sv_nrthreads--; | |
975 | return err; | |
0b7c2f6f CL |
976 | } |
977 | ||
82d56591 CL |
978 | /* |
979 | * A '-' followed by the 'name' of a socket means we close the socket. | |
980 | */ | |
981 | static ssize_t __write_ports_delfd(char *buf) | |
982 | { | |
983 | char *toclose; | |
984 | int len = 0; | |
985 | ||
986 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
987 | if (toclose == NULL) | |
988 | return -ENOMEM; | |
989 | ||
990 | if (nfsd_serv != NULL) | |
8435d34d CL |
991 | len = svc_sock_names(nfsd_serv, buf, |
992 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
82d56591 CL |
993 | if (len >= 0) |
994 | lockd_down(); | |
995 | ||
996 | kfree(toclose); | |
997 | return len; | |
998 | } | |
999 | ||
4eb68c26 CL |
1000 | /* |
1001 | * A transport listener is added by writing it's transport name and | |
1002 | * a port number. | |
1003 | */ | |
1004 | static ssize_t __write_ports_addxprt(char *buf) | |
1005 | { | |
1006 | char transport[16]; | |
1007 | int port, err; | |
1008 | ||
1009 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
1010 | return -EINVAL; | |
1011 | ||
1012 | if (port < 1 || port > USHORT_MAX) | |
1013 | return -EINVAL; | |
1014 | ||
1015 | err = nfsd_create_serv(); | |
1016 | if (err != 0) | |
1017 | return err; | |
1018 | ||
1019 | err = svc_create_xprt(nfsd_serv, transport, | |
1020 | PF_INET, port, SVC_SOCK_ANONYMOUS); | |
1021 | if (err < 0) { | |
1022 | /* Give a reasonable perror msg for bad transport string */ | |
1023 | if (err == -ENOENT) | |
1024 | err = -EPROTONOSUPPORT; | |
1025 | return err; | |
1026 | } | |
1027 | return 0; | |
1028 | } | |
1029 | ||
4cd5dc75 CL |
1030 | /* |
1031 | * A transport listener is removed by writing a "-", it's transport | |
1032 | * name, and it's port number. | |
1033 | */ | |
1034 | static ssize_t __write_ports_delxprt(char *buf) | |
1035 | { | |
1036 | struct svc_xprt *xprt; | |
1037 | char transport[16]; | |
1038 | int port; | |
1039 | ||
1040 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
1041 | return -EINVAL; | |
1042 | ||
1043 | if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) | |
1044 | return -EINVAL; | |
1045 | ||
1046 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
1047 | if (xprt == NULL) | |
1048 | return -ENOTCONN; | |
1049 | ||
1050 | svc_close_xprt(xprt); | |
1051 | svc_xprt_put(xprt); | |
1052 | return 0; | |
1053 | } | |
1054 | ||
bedbdd8b | 1055 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 1056 | { |
0a5372d8 CL |
1057 | if (size == 0) |
1058 | return __write_ports_names(buf); | |
0b7c2f6f CL |
1059 | |
1060 | if (isdigit(buf[0])) | |
1061 | return __write_ports_addfd(buf); | |
82d56591 CL |
1062 | |
1063 | if (buf[0] == '-' && isdigit(buf[1])) | |
1064 | return __write_ports_delfd(buf); | |
4eb68c26 CL |
1065 | |
1066 | if (isalpha(buf[0])) | |
1067 | return __write_ports_addxprt(buf); | |
4cd5dc75 CL |
1068 | |
1069 | if (buf[0] == '-' && isalpha(buf[1])) | |
1070 | return __write_ports_delxprt(buf); | |
1071 | ||
b41b66d6 | 1072 | return -EINVAL; |
80212d59 N |
1073 | } |
1074 | ||
262a0982 CL |
1075 | /** |
1076 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
1077 | * | |
1078 | * Input: | |
1079 | * buf: ignored | |
1080 | * size: zero | |
1081 | * Output: | |
1082 | * On success: passed-in buffer filled with a '\n'-terminated C | |
1083 | * string containing a whitespace-separated list of | |
1084 | * named NFSD listeners; | |
1085 | * return code is the size in bytes of the string | |
1086 | * On error: return code is zero or a negative errno value | |
1087 | * | |
1088 | * OR | |
1089 | * | |
1090 | * Input: | |
1091 | * buf: C string containing an unsigned | |
1092 | * integer value representing a bound | |
1093 | * but unconnected socket that is to be | |
c71206a7 CL |
1094 | * used as an NFSD listener; listen(3) |
1095 | * must be called for a SOCK_STREAM | |
1096 | * socket, otherwise it is ignored | |
262a0982 CL |
1097 | * size: non-zero length of C string in @buf |
1098 | * Output: | |
1099 | * On success: NFS service is started; | |
1100 | * passed-in buffer filled with a '\n'-terminated C | |
1101 | * string containing a unique alphanumeric name of | |
1102 | * the listener; | |
1103 | * return code is the size in bytes of the string | |
1104 | * On error: return code is a negative errno value | |
1105 | * | |
1106 | * OR | |
1107 | * | |
1108 | * Input: | |
1109 | * buf: C string containing a "-" followed | |
1110 | * by an integer value representing a | |
1111 | * previously passed in socket file | |
1112 | * descriptor | |
1113 | * size: non-zero length of C string in @buf | |
1114 | * Output: | |
1115 | * On success: NFS service no longer listens on that socket; | |
1116 | * passed-in buffer filled with a '\n'-terminated C | |
1117 | * string containing a unique name of the listener; | |
1118 | * return code is the size in bytes of the string | |
1119 | * On error: return code is a negative errno value | |
1120 | * | |
1121 | * OR | |
1122 | * | |
1123 | * Input: | |
1124 | * buf: C string containing a transport | |
1125 | * name and an unsigned integer value | |
1126 | * representing the port to listen on, | |
1127 | * separated by whitespace | |
1128 | * size: non-zero length of C string in @buf | |
1129 | * Output: | |
1130 | * On success: returns zero; NFS service is started | |
1131 | * On error: return code is a negative errno value | |
1132 | * | |
1133 | * OR | |
1134 | * | |
1135 | * Input: | |
1136 | * buf: C string containing a "-" followed | |
1137 | * by a transport name and an unsigned | |
1138 | * integer value representing the port | |
1139 | * to listen on, separated by whitespace | |
1140 | * size: non-zero length of C string in @buf | |
1141 | * Output: | |
1142 | * On success: returns zero; NFS service no longer listens | |
1143 | * on that transport | |
1144 | * On error: return code is a negative errno value | |
1145 | */ | |
bedbdd8b NB |
1146 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
1147 | { | |
1148 | ssize_t rv; | |
3dd98a3b | 1149 | |
bedbdd8b NB |
1150 | mutex_lock(&nfsd_mutex); |
1151 | rv = __write_ports(file, buf, size); | |
1152 | mutex_unlock(&nfsd_mutex); | |
1153 | return rv; | |
1154 | } | |
1155 | ||
1156 | ||
596bbe53 N |
1157 | int nfsd_max_blksize; |
1158 | ||
262a0982 CL |
1159 | /** |
1160 | * write_maxblksize - Set or report the current NFS blksize | |
1161 | * | |
1162 | * Input: | |
1163 | * buf: ignored | |
1164 | * size: zero | |
1165 | * | |
1166 | * OR | |
1167 | * | |
1168 | * Input: | |
1169 | * buf: C string containing an unsigned | |
1170 | * integer value representing the new | |
1171 | * NFS blksize | |
1172 | * size: non-zero length of C string in @buf | |
1173 | * Output: | |
1174 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1175 | * containing numeric value of the current NFS blksize | |
1176 | * setting; | |
1177 | * return code is the size in bytes of the string | |
1178 | * On error: return code is zero or a negative errno value | |
1179 | */ | |
596bbe53 N |
1180 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
1181 | { | |
1182 | char *mesg = buf; | |
1183 | if (size > 0) { | |
1184 | int bsize; | |
1185 | int rv = get_int(&mesg, &bsize); | |
1186 | if (rv) | |
1187 | return rv; | |
1188 | /* force bsize into allowed range and | |
1189 | * required alignment. | |
1190 | */ | |
1191 | if (bsize < 1024) | |
1192 | bsize = 1024; | |
1193 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1194 | bsize = NFSSVC_MAXBLKSIZE; | |
1195 | bsize &= ~(1024-1); | |
bedbdd8b | 1196 | mutex_lock(&nfsd_mutex); |
596bbe53 | 1197 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
bedbdd8b | 1198 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1199 | return -EBUSY; |
1200 | } | |
1201 | nfsd_max_blksize = bsize; | |
bedbdd8b | 1202 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 1203 | } |
e06b6405 CL |
1204 | |
1205 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
1206 | nfsd_max_blksize); | |
596bbe53 N |
1207 | } |
1208 | ||
70c3b76c | 1209 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
1210 | extern time_t nfs4_leasetime(void); |
1211 | ||
3dd98a3b | 1212 | static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) |
1da177e4 LT |
1213 | { |
1214 | /* if size > 10 seconds, call | |
1215 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
1216 | */ | |
1217 | char *mesg = buf; | |
3dd98a3b | 1218 | int rv, lease; |
1da177e4 LT |
1219 | |
1220 | if (size > 0) { | |
3dd98a3b JL |
1221 | if (nfsd_serv) |
1222 | return -EBUSY; | |
1da177e4 LT |
1223 | rv = get_int(&mesg, &lease); |
1224 | if (rv) | |
1225 | return rv; | |
1226 | if (lease < 10 || lease > 3600) | |
1227 | return -EINVAL; | |
1228 | nfs4_reset_lease(lease); | |
1229 | } | |
e06b6405 CL |
1230 | |
1231 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", | |
1232 | nfs4_lease_time()); | |
1da177e4 LT |
1233 | } |
1234 | ||
262a0982 CL |
1235 | /** |
1236 | * write_leasetime - Set or report the current NFSv4 lease time | |
1237 | * | |
1238 | * Input: | |
1239 | * buf: ignored | |
1240 | * size: zero | |
1241 | * | |
1242 | * OR | |
1243 | * | |
1244 | * Input: | |
1245 | * buf: C string containing an unsigned | |
1246 | * integer value representing the new | |
1247 | * NFSv4 lease expiry time | |
1248 | * size: non-zero length of C string in @buf | |
1249 | * Output: | |
1250 | * On success: passed-in buffer filled with '\n'-terminated C | |
1251 | * string containing unsigned integer value of the | |
1252 | * current lease expiry time; | |
1253 | * return code is the size in bytes of the string | |
1254 | * On error: return code is zero or a negative errno value | |
1255 | */ | |
3dd98a3b JL |
1256 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1257 | { | |
1258 | ssize_t rv; | |
1259 | ||
1260 | mutex_lock(&nfsd_mutex); | |
1261 | rv = __write_leasetime(file, buf, size); | |
1262 | mutex_unlock(&nfsd_mutex); | |
1263 | return rv; | |
1264 | } | |
1265 | ||
1266 | extern char *nfs4_recoverydir(void); | |
1267 | ||
1268 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
1269 | { |
1270 | char *mesg = buf; | |
1271 | char *recdir; | |
1272 | int len, status; | |
1273 | ||
3dd98a3b JL |
1274 | if (size > 0) { |
1275 | if (nfsd_serv) | |
1276 | return -EBUSY; | |
1277 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1278 | return -EINVAL; | |
1279 | buf[size-1] = 0; | |
0964a3d3 | 1280 | |
3dd98a3b JL |
1281 | recdir = mesg; |
1282 | len = qword_get(&mesg, recdir, size); | |
1283 | if (len <= 0) | |
1284 | return -EINVAL; | |
0964a3d3 | 1285 | |
3dd98a3b JL |
1286 | status = nfs4_reset_recoverydir(recdir); |
1287 | } | |
3d72ab8f CL |
1288 | |
1289 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1290 | nfs4_recoverydir()); | |
0964a3d3 | 1291 | } |
3dd98a3b | 1292 | |
262a0982 CL |
1293 | /** |
1294 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1295 | * | |
1296 | * Input: | |
1297 | * buf: ignored | |
1298 | * size: zero | |
1299 | * | |
1300 | * OR | |
1301 | * | |
1302 | * Input: | |
1303 | * buf: C string containing the pathname | |
1304 | * of the directory on a local file | |
1305 | * system containing permanent NFSv4 | |
1306 | * recovery data | |
1307 | * size: non-zero length of C string in @buf | |
1308 | * Output: | |
1309 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1310 | * containing the current recovery pathname setting; | |
1311 | * return code is the size in bytes of the string | |
1312 | * On error: return code is zero or a negative errno value | |
1313 | */ | |
3dd98a3b JL |
1314 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1315 | { | |
1316 | ssize_t rv; | |
1317 | ||
1318 | mutex_lock(&nfsd_mutex); | |
1319 | rv = __write_recoverydir(file, buf, size); | |
1320 | mutex_unlock(&nfsd_mutex); | |
1321 | return rv; | |
1322 | } | |
1323 | ||
70c3b76c | 1324 | #endif |
0964a3d3 | 1325 | |
1da177e4 LT |
1326 | /*----------------------------------------------------------------------------*/ |
1327 | /* | |
1328 | * populating the filesystem. | |
1329 | */ | |
1330 | ||
1331 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1332 | { | |
1333 | static struct tree_descr nfsd_files[] = { | |
1334 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
1335 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1336 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1337 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1338 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1339 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1340 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1341 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
4373ea84 WC |
1342 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1343 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1344 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1345 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1346 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1347 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1348 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1349 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
70c3b76c | 1350 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1351 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1352 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1353 | #ifdef CONFIG_NFSD_V4 |
1354 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 1355 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1356 | #endif |
1357 | /* last one */ {""} | |
1358 | }; | |
1359 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1360 | } | |
1361 | ||
454e2398 DH |
1362 | static int nfsd_get_sb(struct file_system_type *fs_type, |
1363 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 1364 | { |
454e2398 | 1365 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
1366 | } |
1367 | ||
1368 | static struct file_system_type nfsd_fs_type = { | |
1369 | .owner = THIS_MODULE, | |
1370 | .name = "nfsd", | |
1371 | .get_sb = nfsd_get_sb, | |
1372 | .kill_sb = kill_litter_super, | |
1373 | }; | |
1374 | ||
e331f606 BF |
1375 | #ifdef CONFIG_PROC_FS |
1376 | static int create_proc_exports_entry(void) | |
1377 | { | |
1378 | struct proc_dir_entry *entry; | |
1379 | ||
1380 | entry = proc_mkdir("fs/nfs", NULL); | |
1381 | if (!entry) | |
1382 | return -ENOMEM; | |
9ef2db26 | 1383 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1384 | if (!entry) |
1385 | return -ENOMEM; | |
e331f606 BF |
1386 | return 0; |
1387 | } | |
1388 | #else /* CONFIG_PROC_FS */ | |
1389 | static int create_proc_exports_entry(void) | |
1390 | { | |
1391 | return 0; | |
1392 | } | |
1393 | #endif | |
1394 | ||
1da177e4 LT |
1395 | static int __init init_nfsd(void) |
1396 | { | |
1397 | int retval; | |
1398 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1399 | ||
e8ff2a84 BF |
1400 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1401 | if (retval) | |
1402 | return retval; | |
1da177e4 | 1403 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1404 | retval = nfsd_reply_cache_init(); |
1405 | if (retval) | |
1406 | goto out_free_stat; | |
dbf847ec BF |
1407 | retval = nfsd_export_init(); |
1408 | if (retval) | |
1409 | goto out_free_cache; | |
1da177e4 | 1410 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1411 | retval = nfsd_idmap_init(); |
1412 | if (retval) | |
1413 | goto out_free_lockd; | |
e331f606 BF |
1414 | retval = create_proc_exports_entry(); |
1415 | if (retval) | |
1416 | goto out_free_idmap; | |
1da177e4 | 1417 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1418 | if (retval) |
1419 | goto out_free_all; | |
1420 | return 0; | |
1421 | out_free_all: | |
26808d3f BF |
1422 | remove_proc_entry("fs/nfs/exports", NULL); |
1423 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1424 | out_free_idmap: |
dbf847ec BF |
1425 | nfsd_idmap_shutdown(); |
1426 | out_free_lockd: | |
26808d3f | 1427 | nfsd_lockd_shutdown(); |
e331f606 | 1428 | nfsd_export_shutdown(); |
dbf847ec | 1429 | out_free_cache: |
e331f606 | 1430 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1431 | out_free_stat: |
1432 | nfsd_stat_shutdown(); | |
26808d3f | 1433 | nfsd4_free_slabs(); |
1da177e4 LT |
1434 | return retval; |
1435 | } | |
1436 | ||
1437 | static void __exit exit_nfsd(void) | |
1438 | { | |
1439 | nfsd_export_shutdown(); | |
d5c3428b | 1440 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1441 | remove_proc_entry("fs/nfs/exports", NULL); |
1442 | remove_proc_entry("fs/nfs", NULL); | |
1443 | nfsd_stat_shutdown(); | |
1444 | nfsd_lockd_shutdown(); | |
1da177e4 | 1445 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1446 | nfsd4_free_slabs(); |
1da177e4 LT |
1447 | unregister_filesystem(&nfsd_fs_type); |
1448 | } | |
1449 | ||
1450 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1451 | MODULE_LICENSE("GPL"); | |
1452 | module_init(init_nfsd) | |
1453 | module_exit(exit_nfsd) |