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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfsctl.c | |
3 | * | |
4 | * Syscall interface to knfsd. | |
5 | * | |
6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/module.h> |
10 | ||
11 | #include <linux/linkage.h> | |
12 | #include <linux/time.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/fs.h> | |
3f8206d4 | 15 | #include <linux/namei.h> |
1da177e4 LT |
16 | #include <linux/fcntl.h> |
17 | #include <linux/net.h> | |
18 | #include <linux/in.h> | |
19 | #include <linux/syscalls.h> | |
20 | #include <linux/unistd.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/proc_fs.h> | |
23 | #include <linux/seq_file.h> | |
24 | #include <linux/pagemap.h> | |
25 | #include <linux/init.h> | |
4373ea84 | 26 | #include <linux/inet.h> |
70c3b76c | 27 | #include <linux/string.h> |
80212d59 | 28 | #include <linux/smp_lock.h> |
b41b66d6 | 29 | #include <linux/ctype.h> |
1da177e4 LT |
30 | |
31 | #include <linux/nfs.h> | |
32 | #include <linux/nfsd_idmap.h> | |
b41b66d6 | 33 | #include <linux/lockd/bind.h> |
1da177e4 | 34 | #include <linux/sunrpc/svc.h> |
80212d59 | 35 | #include <linux/sunrpc/svcsock.h> |
1da177e4 LT |
36 | #include <linux/nfsd/nfsd.h> |
37 | #include <linux/nfsd/cache.h> | |
38 | #include <linux/nfsd/xdr.h> | |
39 | #include <linux/nfsd/syscall.h> | |
4373ea84 | 40 | #include <linux/lockd/lockd.h> |
1da177e4 LT |
41 | |
42 | #include <asm/uaccess.h> | |
f15364bd | 43 | #include <net/ipv6.h> |
1da177e4 LT |
44 | |
45 | /* | |
46 | * We have a single directory with 9 nodes in it. | |
47 | */ | |
48 | enum { | |
49 | NFSD_Root = 1, | |
50 | NFSD_Svc, | |
51 | NFSD_Add, | |
52 | NFSD_Del, | |
53 | NFSD_Export, | |
54 | NFSD_Unexport, | |
55 | NFSD_Getfd, | |
56 | NFSD_Getfs, | |
57 | NFSD_List, | |
58 | NFSD_Fh, | |
4373ea84 | 59 | NFSD_FO_UnlockIP, |
17efa372 | 60 | NFSD_FO_UnlockFS, |
1da177e4 | 61 | NFSD_Threads, |
eed2965a | 62 | NFSD_Pool_Threads, |
03cf6c9f | 63 | NFSD_Pool_Stats, |
70c3b76c | 64 | NFSD_Versions, |
80212d59 | 65 | NFSD_Ports, |
596bbe53 | 66 | NFSD_MaxBlkSize, |
70c3b76c N |
67 | /* |
68 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
69 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
70 | */ | |
71 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 72 | NFSD_Leasetime, |
0964a3d3 | 73 | NFSD_RecoveryDir, |
70c3b76c | 74 | #endif |
1da177e4 LT |
75 | }; |
76 | ||
77 | /* | |
78 | * write() for these nodes. | |
79 | */ | |
80 | static ssize_t write_svc(struct file *file, char *buf, size_t size); | |
81 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
82 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
83 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
84 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
85 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
86 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
87 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); | |
b046ccdc CL |
88 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
89 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 90 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 91 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 92 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 93 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 94 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 95 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 96 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 97 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 98 | #endif |
1da177e4 LT |
99 | |
100 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
101 | [NFSD_Svc] = write_svc, | |
102 | [NFSD_Add] = write_add, | |
103 | [NFSD_Del] = write_del, | |
104 | [NFSD_Export] = write_export, | |
105 | [NFSD_Unexport] = write_unexport, | |
106 | [NFSD_Getfd] = write_getfd, | |
107 | [NFSD_Getfs] = write_getfs, | |
108 | [NFSD_Fh] = write_filehandle, | |
b046ccdc CL |
109 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
110 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 111 | [NFSD_Threads] = write_threads, |
eed2965a | 112 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 113 | [NFSD_Versions] = write_versions, |
80212d59 | 114 | [NFSD_Ports] = write_ports, |
596bbe53 | 115 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 116 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 117 | [NFSD_Leasetime] = write_leasetime, |
0964a3d3 | 118 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 119 | #endif |
1da177e4 LT |
120 | }; |
121 | ||
122 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
123 | { | |
7eaa36e2 | 124 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
125 | char *data; |
126 | ssize_t rv; | |
127 | ||
e8c96f8c | 128 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
129 | return -EINVAL; |
130 | ||
131 | data = simple_transaction_get(file, buf, size); | |
132 | if (IS_ERR(data)) | |
133 | return PTR_ERR(data); | |
134 | ||
135 | rv = write_op[ino](file, data, size); | |
8971a101 | 136 | if (rv >= 0) { |
1da177e4 LT |
137 | simple_transaction_set(file, rv); |
138 | rv = size; | |
139 | } | |
140 | return rv; | |
141 | } | |
142 | ||
7390022d N |
143 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
144 | { | |
145 | if (! file->private_data) { | |
146 | /* An attempt to read a transaction file without writing | |
147 | * causes a 0-byte write so that the file can return | |
148 | * state information | |
149 | */ | |
150 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
151 | if (rv < 0) | |
152 | return rv; | |
153 | } | |
154 | return simple_transaction_read(file, buf, size, pos); | |
155 | } | |
156 | ||
4b6f5d20 | 157 | static const struct file_operations transaction_ops = { |
1da177e4 | 158 | .write = nfsctl_transaction_write, |
7390022d | 159 | .read = nfsctl_transaction_read, |
1da177e4 LT |
160 | .release = simple_transaction_release, |
161 | }; | |
162 | ||
1da177e4 LT |
163 | static int exports_open(struct inode *inode, struct file *file) |
164 | { | |
165 | return seq_open(file, &nfs_exports_op); | |
166 | } | |
167 | ||
4b6f5d20 | 168 | static const struct file_operations exports_operations = { |
1da177e4 LT |
169 | .open = exports_open, |
170 | .read = seq_read, | |
171 | .llseek = seq_lseek, | |
172 | .release = seq_release, | |
9ef2db26 | 173 | .owner = THIS_MODULE, |
1da177e4 LT |
174 | }; |
175 | ||
03cf6c9f GB |
176 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); |
177 | ||
178 | static struct file_operations pool_stats_operations = { | |
179 | .open = nfsd_pool_stats_open, | |
180 | .read = seq_read, | |
181 | .llseek = seq_lseek, | |
182 | .release = seq_release, | |
183 | .owner = THIS_MODULE, | |
184 | }; | |
185 | ||
1da177e4 LT |
186 | /*----------------------------------------------------------------------------*/ |
187 | /* | |
188 | * payload - write methods | |
1da177e4 LT |
189 | */ |
190 | ||
262a0982 CL |
191 | /** |
192 | * write_svc - Start kernel's NFSD server | |
193 | * | |
194 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
195 | * Function remains to support old versions of nfs-utils. | |
196 | * | |
197 | * Input: | |
198 | * buf: struct nfsctl_svc | |
199 | * svc_port: port number of this | |
200 | * server's listener | |
201 | * svc_nthreads: number of threads to start | |
202 | * size: size in bytes of passed in nfsctl_svc | |
203 | * Output: | |
204 | * On success: returns zero | |
205 | * On error: return code is negative errno value | |
206 | */ | |
1da177e4 LT |
207 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
208 | { | |
209 | struct nfsctl_svc *data; | |
210 | if (size < sizeof(*data)) | |
211 | return -EINVAL; | |
212 | data = (struct nfsctl_svc*) buf; | |
213 | return nfsd_svc(data->svc_port, data->svc_nthreads); | |
214 | } | |
215 | ||
262a0982 CL |
216 | /** |
217 | * write_add - Add or modify client entry in auth unix cache | |
218 | * | |
219 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
220 | * Function remains to support old versions of nfs-utils. | |
221 | * | |
222 | * Input: | |
223 | * buf: struct nfsctl_client | |
224 | * cl_ident: '\0'-terminated C string | |
225 | * containing domain name | |
226 | * of client | |
227 | * cl_naddr: no. of items in cl_addrlist | |
228 | * cl_addrlist: array of client addresses | |
229 | * cl_fhkeytype: ignored | |
230 | * cl_fhkeylen: ignored | |
231 | * cl_fhkey: ignored | |
232 | * size: size in bytes of passed in nfsctl_client | |
233 | * Output: | |
234 | * On success: returns zero | |
235 | * On error: return code is negative errno value | |
236 | * | |
237 | * Note: Only AF_INET client addresses are passed in, since | |
238 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
239 | */ | |
1da177e4 LT |
240 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
241 | { | |
242 | struct nfsctl_client *data; | |
243 | if (size < sizeof(*data)) | |
244 | return -EINVAL; | |
245 | data = (struct nfsctl_client *)buf; | |
246 | return exp_addclient(data); | |
247 | } | |
248 | ||
262a0982 CL |
249 | /** |
250 | * write_del - Remove client from auth unix cache | |
251 | * | |
252 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
253 | * Function remains to support old versions of nfs-utils. | |
254 | * | |
255 | * Input: | |
256 | * buf: struct nfsctl_client | |
257 | * cl_ident: '\0'-terminated C string | |
258 | * containing domain name | |
259 | * of client | |
260 | * cl_naddr: ignored | |
261 | * cl_addrlist: ignored | |
262 | * cl_fhkeytype: ignored | |
263 | * cl_fhkeylen: ignored | |
264 | * cl_fhkey: ignored | |
265 | * size: size in bytes of passed in nfsctl_client | |
266 | * Output: | |
267 | * On success: returns zero | |
268 | * On error: return code is negative errno value | |
269 | * | |
270 | * Note: Only AF_INET client addresses are passed in, since | |
271 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
272 | */ | |
1da177e4 LT |
273 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
274 | { | |
275 | struct nfsctl_client *data; | |
276 | if (size < sizeof(*data)) | |
277 | return -EINVAL; | |
278 | data = (struct nfsctl_client *)buf; | |
279 | return exp_delclient(data); | |
280 | } | |
281 | ||
262a0982 CL |
282 | /** |
283 | * write_export - Export part or all of a local file system | |
284 | * | |
285 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
286 | * Function remains to support old versions of nfs-utils. | |
287 | * | |
288 | * Input: | |
289 | * buf: struct nfsctl_export | |
290 | * ex_client: '\0'-terminated C string | |
291 | * containing domain name | |
292 | * of client allowed to access | |
293 | * this export | |
294 | * ex_path: '\0'-terminated C string | |
295 | * containing pathname of | |
296 | * directory in local file system | |
297 | * ex_dev: fsid to use for this export | |
298 | * ex_ino: ignored | |
299 | * ex_flags: export flags for this export | |
300 | * ex_anon_uid: UID to use for anonymous | |
301 | * requests | |
302 | * ex_anon_gid: GID to use for anonymous | |
303 | * requests | |
304 | * size: size in bytes of passed in nfsctl_export | |
305 | * Output: | |
306 | * On success: returns zero | |
307 | * On error: return code is negative errno value | |
308 | */ | |
1da177e4 LT |
309 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
310 | { | |
311 | struct nfsctl_export *data; | |
312 | if (size < sizeof(*data)) | |
313 | return -EINVAL; | |
314 | data = (struct nfsctl_export*)buf; | |
315 | return exp_export(data); | |
316 | } | |
317 | ||
262a0982 CL |
318 | /** |
319 | * write_unexport - Unexport a previously exported file system | |
320 | * | |
321 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
322 | * Function remains to support old versions of nfs-utils. | |
323 | * | |
324 | * Input: | |
325 | * buf: struct nfsctl_export | |
326 | * ex_client: '\0'-terminated C string | |
327 | * containing domain name | |
328 | * of client no longer allowed | |
329 | * to access this export | |
330 | * ex_path: '\0'-terminated C string | |
331 | * containing pathname of | |
332 | * directory in local file system | |
333 | * ex_dev: ignored | |
334 | * ex_ino: ignored | |
335 | * ex_flags: ignored | |
336 | * ex_anon_uid: ignored | |
337 | * ex_anon_gid: ignored | |
338 | * size: size in bytes of passed in nfsctl_export | |
339 | * Output: | |
340 | * On success: returns zero | |
341 | * On error: return code is negative errno value | |
342 | */ | |
1da177e4 LT |
343 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
344 | { | |
345 | struct nfsctl_export *data; | |
346 | ||
347 | if (size < sizeof(*data)) | |
348 | return -EINVAL; | |
349 | data = (struct nfsctl_export*)buf; | |
350 | return exp_unexport(data); | |
351 | } | |
352 | ||
262a0982 CL |
353 | /** |
354 | * write_getfs - Get a variable-length NFS file handle by path | |
355 | * | |
356 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
357 | * Function remains to support old versions of nfs-utils. | |
358 | * | |
359 | * Input: | |
360 | * buf: struct nfsctl_fsparm | |
361 | * gd_addr: socket address of client | |
362 | * gd_path: '\0'-terminated C string | |
363 | * containing pathname of | |
364 | * directory in local file system | |
365 | * gd_maxlen: maximum size of returned file | |
366 | * handle | |
367 | * size: size in bytes of passed in nfsctl_fsparm | |
368 | * Output: | |
369 | * On success: passed-in buffer filled with a knfsd_fh structure | |
370 | * (a variable-length raw NFS file handle); | |
371 | * return code is the size in bytes of the file handle | |
372 | * On error: return code is negative errno value | |
373 | * | |
374 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
375 | * is the same size as a struct sockaddr_in. | |
376 | */ | |
1da177e4 LT |
377 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
378 | { | |
379 | struct nfsctl_fsparm *data; | |
380 | struct sockaddr_in *sin; | |
381 | struct auth_domain *clp; | |
382 | int err = 0; | |
383 | struct knfsd_fh *res; | |
f15364bd | 384 | struct in6_addr in6; |
1da177e4 LT |
385 | |
386 | if (size < sizeof(*data)) | |
387 | return -EINVAL; | |
388 | data = (struct nfsctl_fsparm*)buf; | |
389 | err = -EPROTONOSUPPORT; | |
390 | if (data->gd_addr.sa_family != AF_INET) | |
391 | goto out; | |
392 | sin = (struct sockaddr_in *)&data->gd_addr; | |
393 | if (data->gd_maxlen > NFS3_FHSIZE) | |
394 | data->gd_maxlen = NFS3_FHSIZE; | |
395 | ||
396 | res = (struct knfsd_fh*)buf; | |
397 | ||
398 | exp_readlock(); | |
f15364bd AC |
399 | |
400 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
401 | ||
402 | clp = auth_unix_lookup(&in6); | |
403 | if (!clp) | |
1da177e4 LT |
404 | err = -EPERM; |
405 | else { | |
406 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
407 | auth_domain_put(clp); | |
408 | } | |
409 | exp_readunlock(); | |
410 | if (err == 0) | |
12127498 | 411 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
412 | out: |
413 | return err; | |
414 | } | |
415 | ||
262a0982 CL |
416 | /** |
417 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
418 | * | |
419 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
420 | * Function remains to support old versions of nfs-utils. | |
421 | * | |
422 | * Input: | |
423 | * buf: struct nfsctl_fdparm | |
424 | * gd_addr: socket address of client | |
425 | * gd_path: '\0'-terminated C string | |
426 | * containing pathname of | |
427 | * directory in local file system | |
428 | * gd_version: fdparm structure version | |
429 | * size: size in bytes of passed in nfsctl_fdparm | |
430 | * Output: | |
431 | * On success: passed-in buffer filled with nfsctl_res | |
432 | * (a fixed-length raw NFS file handle); | |
433 | * return code is the size in bytes of the file handle | |
434 | * On error: return code is negative errno value | |
435 | * | |
436 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
437 | * is the same size as a struct sockaddr_in. | |
438 | */ | |
1da177e4 LT |
439 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
440 | { | |
441 | struct nfsctl_fdparm *data; | |
442 | struct sockaddr_in *sin; | |
443 | struct auth_domain *clp; | |
444 | int err = 0; | |
445 | struct knfsd_fh fh; | |
446 | char *res; | |
f15364bd | 447 | struct in6_addr in6; |
1da177e4 LT |
448 | |
449 | if (size < sizeof(*data)) | |
450 | return -EINVAL; | |
451 | data = (struct nfsctl_fdparm*)buf; | |
452 | err = -EPROTONOSUPPORT; | |
453 | if (data->gd_addr.sa_family != AF_INET) | |
454 | goto out; | |
455 | err = -EINVAL; | |
456 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
457 | goto out; | |
458 | ||
459 | res = buf; | |
460 | sin = (struct sockaddr_in *)&data->gd_addr; | |
461 | exp_readlock(); | |
f15364bd AC |
462 | |
463 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
464 | ||
465 | clp = auth_unix_lookup(&in6); | |
466 | if (!clp) | |
1da177e4 LT |
467 | err = -EPERM; |
468 | else { | |
469 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
470 | auth_domain_put(clp); | |
471 | } | |
472 | exp_readunlock(); | |
473 | ||
474 | if (err == 0) { | |
475 | memset(res,0, NFS_FHSIZE); | |
476 | memcpy(res, &fh.fh_base, fh.fh_size); | |
477 | err = NFS_FHSIZE; | |
478 | } | |
479 | out: | |
480 | return err; | |
481 | } | |
482 | ||
262a0982 CL |
483 | /** |
484 | * write_unlock_ip - Release all locks used by a client | |
485 | * | |
486 | * Experimental. | |
487 | * | |
488 | * Input: | |
489 | * buf: '\n'-terminated C string containing a | |
490 | * presentation format IPv4 address | |
491 | * size: length of C string in @buf | |
492 | * Output: | |
493 | * On success: returns zero if all specified locks were released; | |
494 | * returns one if one or more locks were not released | |
495 | * On error: return code is negative errno value | |
496 | * | |
497 | * Note: Only AF_INET client addresses are passed in | |
498 | */ | |
b046ccdc | 499 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 500 | { |
367c8c7b CL |
501 | struct sockaddr_in sin = { |
502 | .sin_family = AF_INET, | |
503 | }; | |
4373ea84 | 504 | int b1, b2, b3, b4; |
367c8c7b CL |
505 | char c; |
506 | char *fo_path; | |
4373ea84 WC |
507 | |
508 | /* sanity check */ | |
509 | if (size == 0) | |
510 | return -EINVAL; | |
511 | ||
512 | if (buf[size-1] != '\n') | |
513 | return -EINVAL; | |
514 | ||
515 | fo_path = buf; | |
516 | if (qword_get(&buf, fo_path, size) < 0) | |
517 | return -EINVAL; | |
518 | ||
519 | /* get ipv4 address */ | |
be859405 | 520 | if (sscanf(fo_path, "%u.%u.%u.%u%c", &b1, &b2, &b3, &b4, &c) != 4) |
367c8c7b CL |
521 | return -EINVAL; |
522 | if (b1 > 255 || b2 > 255 || b3 > 255 || b4 > 255) | |
4373ea84 | 523 | return -EINVAL; |
367c8c7b | 524 | sin.sin_addr.s_addr = htonl((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); |
4373ea84 | 525 | |
367c8c7b | 526 | return nlmsvc_unlock_all_by_ip((struct sockaddr *)&sin); |
4373ea84 WC |
527 | } |
528 | ||
262a0982 CL |
529 | /** |
530 | * write_unlock_fs - Release all locks on a local file system | |
531 | * | |
532 | * Experimental. | |
533 | * | |
534 | * Input: | |
535 | * buf: '\n'-terminated C string containing the | |
536 | * absolute pathname of a local file system | |
537 | * size: length of C string in @buf | |
538 | * Output: | |
539 | * On success: returns zero if all specified locks were released; | |
540 | * returns one if one or more locks were not released | |
541 | * On error: return code is negative errno value | |
542 | */ | |
b046ccdc | 543 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 544 | { |
a63bb996 | 545 | struct path path; |
17efa372 WC |
546 | char *fo_path; |
547 | int error; | |
548 | ||
549 | /* sanity check */ | |
550 | if (size == 0) | |
551 | return -EINVAL; | |
552 | ||
553 | if (buf[size-1] != '\n') | |
554 | return -EINVAL; | |
555 | ||
556 | fo_path = buf; | |
557 | if (qword_get(&buf, fo_path, size) < 0) | |
558 | return -EINVAL; | |
559 | ||
a63bb996 | 560 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
561 | if (error) |
562 | return error; | |
563 | ||
262a0982 CL |
564 | /* |
565 | * XXX: Needs better sanity checking. Otherwise we could end up | |
566 | * releasing locks on the wrong file system. | |
567 | * | |
568 | * For example: | |
569 | * 1. Does the path refer to a directory? | |
570 | * 2. Is that directory a mount point, or | |
571 | * 3. Is that directory the root of an exported file system? | |
572 | */ | |
a63bb996 | 573 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 574 | |
a63bb996 | 575 | path_put(&path); |
17efa372 WC |
576 | return error; |
577 | } | |
578 | ||
262a0982 CL |
579 | /** |
580 | * write_filehandle - Get a variable-length NFS file handle by path | |
581 | * | |
582 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
583 | * three alphanumeric words separated by whitespace. The string may | |
584 | * contain escape sequences. | |
585 | * | |
586 | * Input: | |
587 | * buf: | |
588 | * domain: client domain name | |
589 | * path: export pathname | |
590 | * maxsize: numeric maximum size of | |
591 | * @buf | |
592 | * size: length of C string in @buf | |
593 | * Output: | |
594 | * On success: passed-in buffer filled with '\n'-terminated C | |
595 | * string containing a ASCII hex text version | |
596 | * of the NFS file handle; | |
597 | * return code is the size in bytes of the string | |
598 | * On error: return code is negative errno value | |
599 | */ | |
1da177e4 LT |
600 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
601 | { | |
1da177e4 | 602 | char *dname, *path; |
246d95ba | 603 | int uninitialized_var(maxsize); |
1da177e4 LT |
604 | char *mesg = buf; |
605 | int len; | |
606 | struct auth_domain *dom; | |
607 | struct knfsd_fh fh; | |
608 | ||
87d26ea7 BF |
609 | if (size == 0) |
610 | return -EINVAL; | |
611 | ||
1da177e4 LT |
612 | if (buf[size-1] != '\n') |
613 | return -EINVAL; | |
614 | buf[size-1] = 0; | |
615 | ||
616 | dname = mesg; | |
617 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
618 | if (len <= 0) |
619 | return -EINVAL; | |
1da177e4 LT |
620 | |
621 | path = dname+len+1; | |
622 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
623 | if (len <= 0) |
624 | return -EINVAL; | |
1da177e4 LT |
625 | |
626 | len = get_int(&mesg, &maxsize); | |
627 | if (len) | |
628 | return len; | |
629 | ||
630 | if (maxsize < NFS_FHSIZE) | |
631 | return -EINVAL; | |
632 | if (maxsize > NFS3_FHSIZE) | |
633 | maxsize = NFS3_FHSIZE; | |
634 | ||
635 | if (qword_get(&mesg, mesg, size)>0) | |
636 | return -EINVAL; | |
637 | ||
638 | /* we have all the words, they are in buf.. */ | |
639 | dom = unix_domain_find(dname); | |
640 | if (!dom) | |
641 | return -ENOMEM; | |
642 | ||
643 | len = exp_rootfh(dom, path, &fh, maxsize); | |
644 | auth_domain_put(dom); | |
645 | if (len) | |
646 | return len; | |
647 | ||
54224f04 CL |
648 | mesg = buf; |
649 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
650 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
651 | mesg[-1] = '\n'; | |
652 | return mesg - buf; | |
653 | } | |
654 | ||
262a0982 CL |
655 | /** |
656 | * write_threads - Start NFSD, or report the current number of running threads | |
657 | * | |
658 | * Input: | |
659 | * buf: ignored | |
660 | * size: zero | |
661 | * Output: | |
662 | * On success: passed-in buffer filled with '\n'-terminated C | |
663 | * string numeric value representing the number of | |
664 | * running NFSD threads; | |
665 | * return code is the size in bytes of the string | |
666 | * On error: return code is zero | |
667 | * | |
668 | * OR | |
669 | * | |
670 | * Input: | |
671 | * buf: C string containing an unsigned | |
672 | * integer value representing the | |
673 | * number of NFSD threads to start | |
674 | * size: non-zero length of C string in @buf | |
675 | * Output: | |
676 | * On success: NFS service is started; | |
677 | * passed-in buffer filled with '\n'-terminated C | |
678 | * string numeric value representing the number of | |
679 | * running NFSD threads; | |
680 | * return code is the size in bytes of the string | |
681 | * On error: return code is zero or a negative errno value | |
682 | */ | |
1da177e4 LT |
683 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
684 | { | |
1da177e4 LT |
685 | char *mesg = buf; |
686 | int rv; | |
687 | if (size > 0) { | |
688 | int newthreads; | |
689 | rv = get_int(&mesg, &newthreads); | |
690 | if (rv) | |
691 | return rv; | |
9e074856 | 692 | if (newthreads < 0) |
1da177e4 | 693 | return -EINVAL; |
9e074856 | 694 | rv = nfsd_svc(NFS_PORT, newthreads); |
1da177e4 LT |
695 | if (rv) |
696 | return rv; | |
697 | } | |
e06b6405 CL |
698 | |
699 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
700 | nfsd_nrthreads()); | |
1da177e4 LT |
701 | } |
702 | ||
262a0982 CL |
703 | /** |
704 | * write_pool_threads - Set or report the current number of threads per pool | |
705 | * | |
706 | * Input: | |
707 | * buf: ignored | |
708 | * size: zero | |
709 | * | |
710 | * OR | |
711 | * | |
712 | * Input: | |
713 | * buf: C string containing whitespace- | |
714 | * separated unsigned integer values | |
715 | * representing the number of NFSD | |
716 | * threads to start in each pool | |
717 | * size: non-zero length of C string in @buf | |
718 | * Output: | |
719 | * On success: passed-in buffer filled with '\n'-terminated C | |
720 | * string containing integer values representing the | |
721 | * number of NFSD threads in each pool; | |
722 | * return code is the size in bytes of the string | |
723 | * On error: return code is zero or a negative errno value | |
724 | */ | |
eed2965a GB |
725 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
726 | { | |
727 | /* if size > 0, look for an array of number of threads per node | |
728 | * and apply them then write out number of threads per node as reply | |
729 | */ | |
730 | char *mesg = buf; | |
731 | int i; | |
732 | int rv; | |
733 | int len; | |
bedbdd8b | 734 | int npools; |
eed2965a GB |
735 | int *nthreads; |
736 | ||
bedbdd8b NB |
737 | mutex_lock(&nfsd_mutex); |
738 | npools = nfsd_nrpools(); | |
eed2965a GB |
739 | if (npools == 0) { |
740 | /* | |
741 | * NFS is shut down. The admin can start it by | |
742 | * writing to the threads file but NOT the pool_threads | |
743 | * file, sorry. Report zero threads. | |
744 | */ | |
bedbdd8b | 745 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
746 | strcpy(buf, "0\n"); |
747 | return strlen(buf); | |
748 | } | |
749 | ||
750 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 751 | rv = -ENOMEM; |
eed2965a | 752 | if (nthreads == NULL) |
bedbdd8b | 753 | goto out_free; |
eed2965a GB |
754 | |
755 | if (size > 0) { | |
756 | for (i = 0; i < npools; i++) { | |
757 | rv = get_int(&mesg, &nthreads[i]); | |
758 | if (rv == -ENOENT) | |
759 | break; /* fewer numbers than pools */ | |
760 | if (rv) | |
761 | goto out_free; /* syntax error */ | |
762 | rv = -EINVAL; | |
763 | if (nthreads[i] < 0) | |
764 | goto out_free; | |
765 | } | |
766 | rv = nfsd_set_nrthreads(i, nthreads); | |
767 | if (rv) | |
768 | goto out_free; | |
769 | } | |
770 | ||
771 | rv = nfsd_get_nrthreads(npools, nthreads); | |
772 | if (rv) | |
773 | goto out_free; | |
774 | ||
775 | mesg = buf; | |
776 | size = SIMPLE_TRANSACTION_LIMIT; | |
777 | for (i = 0; i < npools && size > 0; i++) { | |
778 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
779 | len = strlen(mesg); | |
780 | size -= len; | |
781 | mesg += len; | |
782 | } | |
783 | ||
bedbdd8b | 784 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
785 | return (mesg-buf); |
786 | ||
787 | out_free: | |
788 | kfree(nthreads); | |
bedbdd8b | 789 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
790 | return rv; |
791 | } | |
792 | ||
3dd98a3b | 793 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 794 | { |
70c3b76c | 795 | char *mesg = buf; |
8daf220a | 796 | char *vers, *minorp, sign; |
261758b5 | 797 | int len, num, remaining; |
8daf220a | 798 | unsigned minor; |
70c3b76c N |
799 | ssize_t tlen = 0; |
800 | char *sep; | |
801 | ||
802 | if (size>0) { | |
803 | if (nfsd_serv) | |
6658d3a7 N |
804 | /* Cannot change versions without updating |
805 | * nfsd_serv->sv_xdrsize, and reallocing | |
806 | * rq_argp and rq_resp | |
807 | */ | |
70c3b76c N |
808 | return -EBUSY; |
809 | if (buf[size-1] != '\n') | |
810 | return -EINVAL; | |
811 | buf[size-1] = 0; | |
812 | ||
813 | vers = mesg; | |
814 | len = qword_get(&mesg, vers, size); | |
815 | if (len <= 0) return -EINVAL; | |
816 | do { | |
817 | sign = *vers; | |
818 | if (sign == '+' || sign == '-') | |
8daf220a | 819 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 820 | else |
8daf220a BH |
821 | num = simple_strtol(vers, &minorp, 0); |
822 | if (*minorp == '.') { | |
823 | if (num < 4) | |
824 | return -EINVAL; | |
825 | minor = simple_strtoul(minorp+1, NULL, 0); | |
826 | if (minor == 0) | |
827 | return -EINVAL; | |
828 | if (nfsd_minorversion(minor, sign == '-' ? | |
829 | NFSD_CLEAR : NFSD_SET) < 0) | |
830 | return -EINVAL; | |
831 | goto next; | |
832 | } | |
70c3b76c N |
833 | switch(num) { |
834 | case 2: | |
835 | case 3: | |
836 | case 4: | |
6658d3a7 | 837 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
838 | break; |
839 | default: | |
840 | return -EINVAL; | |
841 | } | |
8daf220a | 842 | next: |
70c3b76c | 843 | vers += len + 1; |
70c3b76c N |
844 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
845 | /* If all get turned off, turn them back on, as | |
846 | * having no versions is BAD | |
847 | */ | |
6658d3a7 | 848 | nfsd_reset_versions(); |
70c3b76c | 849 | } |
261758b5 | 850 | |
70c3b76c N |
851 | /* Now write current state into reply buffer */ |
852 | len = 0; | |
853 | sep = ""; | |
261758b5 | 854 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 855 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 856 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 857 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 858 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
859 | num); |
860 | sep = " "; | |
261758b5 CL |
861 | |
862 | if (len > remaining) | |
863 | break; | |
864 | remaining -= len; | |
865 | buf += len; | |
866 | tlen += len; | |
70c3b76c | 867 | } |
8daf220a | 868 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
869 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
870 | minor++) { | |
871 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
872 | (nfsd_vers(4, NFSD_TEST) && |
873 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
874 | '+' : '-', | |
875 | minor); | |
261758b5 CL |
876 | |
877 | if (len > remaining) | |
878 | break; | |
879 | remaining -= len; | |
880 | buf += len; | |
881 | tlen += len; | |
882 | } | |
883 | ||
884 | len = snprintf(buf, remaining, "\n"); | |
885 | if (len > remaining) | |
886 | return -EINVAL; | |
887 | return tlen + len; | |
70c3b76c N |
888 | } |
889 | ||
262a0982 CL |
890 | /** |
891 | * write_versions - Set or report the available NFS protocol versions | |
892 | * | |
893 | * Input: | |
894 | * buf: ignored | |
895 | * size: zero | |
896 | * Output: | |
897 | * On success: passed-in buffer filled with '\n'-terminated C | |
898 | * string containing positive or negative integer | |
899 | * values representing the current status of each | |
900 | * protocol version; | |
901 | * return code is the size in bytes of the string | |
902 | * On error: return code is zero or a negative errno value | |
903 | * | |
904 | * OR | |
905 | * | |
906 | * Input: | |
907 | * buf: C string containing whitespace- | |
908 | * separated positive or negative | |
909 | * integer values representing NFS | |
910 | * protocol versions to enable ("+n") | |
911 | * or disable ("-n") | |
912 | * size: non-zero length of C string in @buf | |
913 | * Output: | |
914 | * On success: status of zero or more protocol versions has | |
915 | * been updated; passed-in buffer filled with | |
916 | * '\n'-terminated C string containing positive | |
917 | * or negative integer values representing the | |
918 | * current status of each protocol version; | |
919 | * return code is the size in bytes of the string | |
920 | * On error: return code is zero or a negative errno value | |
921 | */ | |
3dd98a3b JL |
922 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
923 | { | |
924 | ssize_t rv; | |
925 | ||
926 | mutex_lock(&nfsd_mutex); | |
927 | rv = __write_versions(file, buf, size); | |
928 | mutex_unlock(&nfsd_mutex); | |
929 | return rv; | |
930 | } | |
931 | ||
0a5372d8 CL |
932 | /* |
933 | * Zero-length write. Return a list of NFSD's current listener | |
934 | * transports. | |
935 | */ | |
936 | static ssize_t __write_ports_names(char *buf) | |
937 | { | |
938 | if (nfsd_serv == NULL) | |
939 | return 0; | |
335c54bd | 940 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
941 | } |
942 | ||
0b7c2f6f CL |
943 | /* |
944 | * A single 'fd' number was written, in which case it must be for | |
945 | * a socket of a supported family/protocol, and we use it as an | |
946 | * nfsd listener. | |
947 | */ | |
948 | static ssize_t __write_ports_addfd(char *buf) | |
949 | { | |
950 | char *mesg = buf; | |
951 | int fd, err; | |
952 | ||
953 | err = get_int(&mesg, &fd); | |
954 | if (err != 0 || fd < 0) | |
955 | return -EINVAL; | |
956 | ||
957 | err = nfsd_create_serv(); | |
958 | if (err != 0) | |
959 | return err; | |
960 | ||
ea068bad CL |
961 | err = lockd_up(); |
962 | if (err != 0) | |
963 | goto out; | |
0b7c2f6f | 964 | |
bfba9ab4 | 965 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
ea068bad CL |
966 | if (err < 0) |
967 | lockd_down(); | |
0b7c2f6f | 968 | |
ea068bad CL |
969 | out: |
970 | /* Decrease the count, but don't shut down the service */ | |
971 | nfsd_serv->sv_nrthreads--; | |
972 | return err; | |
0b7c2f6f CL |
973 | } |
974 | ||
82d56591 CL |
975 | /* |
976 | * A '-' followed by the 'name' of a socket means we close the socket. | |
977 | */ | |
978 | static ssize_t __write_ports_delfd(char *buf) | |
979 | { | |
980 | char *toclose; | |
981 | int len = 0; | |
982 | ||
983 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
984 | if (toclose == NULL) | |
985 | return -ENOMEM; | |
986 | ||
987 | if (nfsd_serv != NULL) | |
8435d34d CL |
988 | len = svc_sock_names(nfsd_serv, buf, |
989 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
82d56591 CL |
990 | if (len >= 0) |
991 | lockd_down(); | |
992 | ||
993 | kfree(toclose); | |
994 | return len; | |
995 | } | |
996 | ||
4eb68c26 CL |
997 | /* |
998 | * A transport listener is added by writing it's transport name and | |
999 | * a port number. | |
1000 | */ | |
1001 | static ssize_t __write_ports_addxprt(char *buf) | |
1002 | { | |
1003 | char transport[16]; | |
1004 | int port, err; | |
1005 | ||
1006 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
1007 | return -EINVAL; | |
1008 | ||
1009 | if (port < 1 || port > USHORT_MAX) | |
1010 | return -EINVAL; | |
1011 | ||
1012 | err = nfsd_create_serv(); | |
1013 | if (err != 0) | |
1014 | return err; | |
1015 | ||
1016 | err = svc_create_xprt(nfsd_serv, transport, | |
1017 | PF_INET, port, SVC_SOCK_ANONYMOUS); | |
1018 | if (err < 0) { | |
1019 | /* Give a reasonable perror msg for bad transport string */ | |
1020 | if (err == -ENOENT) | |
1021 | err = -EPROTONOSUPPORT; | |
1022 | return err; | |
1023 | } | |
1024 | return 0; | |
1025 | } | |
1026 | ||
4cd5dc75 CL |
1027 | /* |
1028 | * A transport listener is removed by writing a "-", it's transport | |
1029 | * name, and it's port number. | |
1030 | */ | |
1031 | static ssize_t __write_ports_delxprt(char *buf) | |
1032 | { | |
1033 | struct svc_xprt *xprt; | |
1034 | char transport[16]; | |
1035 | int port; | |
1036 | ||
1037 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) | |
1041 | return -EINVAL; | |
1042 | ||
1043 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
1044 | if (xprt == NULL) | |
1045 | return -ENOTCONN; | |
1046 | ||
1047 | svc_close_xprt(xprt); | |
1048 | svc_xprt_put(xprt); | |
1049 | return 0; | |
1050 | } | |
1051 | ||
bedbdd8b | 1052 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 1053 | { |
0a5372d8 CL |
1054 | if (size == 0) |
1055 | return __write_ports_names(buf); | |
0b7c2f6f CL |
1056 | |
1057 | if (isdigit(buf[0])) | |
1058 | return __write_ports_addfd(buf); | |
82d56591 CL |
1059 | |
1060 | if (buf[0] == '-' && isdigit(buf[1])) | |
1061 | return __write_ports_delfd(buf); | |
4eb68c26 CL |
1062 | |
1063 | if (isalpha(buf[0])) | |
1064 | return __write_ports_addxprt(buf); | |
4cd5dc75 CL |
1065 | |
1066 | if (buf[0] == '-' && isalpha(buf[1])) | |
1067 | return __write_ports_delxprt(buf); | |
1068 | ||
b41b66d6 | 1069 | return -EINVAL; |
80212d59 N |
1070 | } |
1071 | ||
262a0982 CL |
1072 | /** |
1073 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
1074 | * | |
1075 | * Input: | |
1076 | * buf: ignored | |
1077 | * size: zero | |
1078 | * Output: | |
1079 | * On success: passed-in buffer filled with a '\n'-terminated C | |
1080 | * string containing a whitespace-separated list of | |
1081 | * named NFSD listeners; | |
1082 | * return code is the size in bytes of the string | |
1083 | * On error: return code is zero or a negative errno value | |
1084 | * | |
1085 | * OR | |
1086 | * | |
1087 | * Input: | |
1088 | * buf: C string containing an unsigned | |
1089 | * integer value representing a bound | |
1090 | * but unconnected socket that is to be | |
c71206a7 CL |
1091 | * used as an NFSD listener; listen(3) |
1092 | * must be called for a SOCK_STREAM | |
1093 | * socket, otherwise it is ignored | |
262a0982 CL |
1094 | * size: non-zero length of C string in @buf |
1095 | * Output: | |
1096 | * On success: NFS service is started; | |
1097 | * passed-in buffer filled with a '\n'-terminated C | |
1098 | * string containing a unique alphanumeric name of | |
1099 | * the listener; | |
1100 | * return code is the size in bytes of the string | |
1101 | * On error: return code is a negative errno value | |
1102 | * | |
1103 | * OR | |
1104 | * | |
1105 | * Input: | |
1106 | * buf: C string containing a "-" followed | |
1107 | * by an integer value representing a | |
1108 | * previously passed in socket file | |
1109 | * descriptor | |
1110 | * size: non-zero length of C string in @buf | |
1111 | * Output: | |
1112 | * On success: NFS service no longer listens on that socket; | |
1113 | * passed-in buffer filled with a '\n'-terminated C | |
1114 | * string containing a unique name of the listener; | |
1115 | * return code is the size in bytes of the string | |
1116 | * On error: return code is a negative errno value | |
1117 | * | |
1118 | * OR | |
1119 | * | |
1120 | * Input: | |
1121 | * buf: C string containing a transport | |
1122 | * name and an unsigned integer value | |
1123 | * representing the port to listen on, | |
1124 | * separated by whitespace | |
1125 | * size: non-zero length of C string in @buf | |
1126 | * Output: | |
1127 | * On success: returns zero; NFS service is started | |
1128 | * On error: return code is a negative errno value | |
1129 | * | |
1130 | * OR | |
1131 | * | |
1132 | * Input: | |
1133 | * buf: C string containing a "-" followed | |
1134 | * by a transport name and an unsigned | |
1135 | * integer value representing the port | |
1136 | * to listen on, separated by whitespace | |
1137 | * size: non-zero length of C string in @buf | |
1138 | * Output: | |
1139 | * On success: returns zero; NFS service no longer listens | |
1140 | * on that transport | |
1141 | * On error: return code is a negative errno value | |
1142 | */ | |
bedbdd8b NB |
1143 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
1144 | { | |
1145 | ssize_t rv; | |
3dd98a3b | 1146 | |
bedbdd8b NB |
1147 | mutex_lock(&nfsd_mutex); |
1148 | rv = __write_ports(file, buf, size); | |
1149 | mutex_unlock(&nfsd_mutex); | |
1150 | return rv; | |
1151 | } | |
1152 | ||
1153 | ||
596bbe53 N |
1154 | int nfsd_max_blksize; |
1155 | ||
262a0982 CL |
1156 | /** |
1157 | * write_maxblksize - Set or report the current NFS blksize | |
1158 | * | |
1159 | * Input: | |
1160 | * buf: ignored | |
1161 | * size: zero | |
1162 | * | |
1163 | * OR | |
1164 | * | |
1165 | * Input: | |
1166 | * buf: C string containing an unsigned | |
1167 | * integer value representing the new | |
1168 | * NFS blksize | |
1169 | * size: non-zero length of C string in @buf | |
1170 | * Output: | |
1171 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1172 | * containing numeric value of the current NFS blksize | |
1173 | * setting; | |
1174 | * return code is the size in bytes of the string | |
1175 | * On error: return code is zero or a negative errno value | |
1176 | */ | |
596bbe53 N |
1177 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
1178 | { | |
1179 | char *mesg = buf; | |
1180 | if (size > 0) { | |
1181 | int bsize; | |
1182 | int rv = get_int(&mesg, &bsize); | |
1183 | if (rv) | |
1184 | return rv; | |
1185 | /* force bsize into allowed range and | |
1186 | * required alignment. | |
1187 | */ | |
1188 | if (bsize < 1024) | |
1189 | bsize = 1024; | |
1190 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1191 | bsize = NFSSVC_MAXBLKSIZE; | |
1192 | bsize &= ~(1024-1); | |
bedbdd8b | 1193 | mutex_lock(&nfsd_mutex); |
596bbe53 | 1194 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
bedbdd8b | 1195 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1196 | return -EBUSY; |
1197 | } | |
1198 | nfsd_max_blksize = bsize; | |
bedbdd8b | 1199 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 1200 | } |
e06b6405 CL |
1201 | |
1202 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
1203 | nfsd_max_blksize); | |
596bbe53 N |
1204 | } |
1205 | ||
70c3b76c | 1206 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
1207 | extern time_t nfs4_leasetime(void); |
1208 | ||
3dd98a3b | 1209 | static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) |
1da177e4 LT |
1210 | { |
1211 | /* if size > 10 seconds, call | |
1212 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
1213 | */ | |
1214 | char *mesg = buf; | |
3dd98a3b | 1215 | int rv, lease; |
1da177e4 LT |
1216 | |
1217 | if (size > 0) { | |
3dd98a3b JL |
1218 | if (nfsd_serv) |
1219 | return -EBUSY; | |
1da177e4 LT |
1220 | rv = get_int(&mesg, &lease); |
1221 | if (rv) | |
1222 | return rv; | |
1223 | if (lease < 10 || lease > 3600) | |
1224 | return -EINVAL; | |
1225 | nfs4_reset_lease(lease); | |
1226 | } | |
e06b6405 CL |
1227 | |
1228 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", | |
1229 | nfs4_lease_time()); | |
1da177e4 LT |
1230 | } |
1231 | ||
262a0982 CL |
1232 | /** |
1233 | * write_leasetime - Set or report the current NFSv4 lease time | |
1234 | * | |
1235 | * Input: | |
1236 | * buf: ignored | |
1237 | * size: zero | |
1238 | * | |
1239 | * OR | |
1240 | * | |
1241 | * Input: | |
1242 | * buf: C string containing an unsigned | |
1243 | * integer value representing the new | |
1244 | * NFSv4 lease expiry time | |
1245 | * size: non-zero length of C string in @buf | |
1246 | * Output: | |
1247 | * On success: passed-in buffer filled with '\n'-terminated C | |
1248 | * string containing unsigned integer value of the | |
1249 | * current lease expiry time; | |
1250 | * return code is the size in bytes of the string | |
1251 | * On error: return code is zero or a negative errno value | |
1252 | */ | |
3dd98a3b JL |
1253 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1254 | { | |
1255 | ssize_t rv; | |
1256 | ||
1257 | mutex_lock(&nfsd_mutex); | |
1258 | rv = __write_leasetime(file, buf, size); | |
1259 | mutex_unlock(&nfsd_mutex); | |
1260 | return rv; | |
1261 | } | |
1262 | ||
1263 | extern char *nfs4_recoverydir(void); | |
1264 | ||
1265 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
1266 | { |
1267 | char *mesg = buf; | |
1268 | char *recdir; | |
1269 | int len, status; | |
1270 | ||
3dd98a3b JL |
1271 | if (size > 0) { |
1272 | if (nfsd_serv) | |
1273 | return -EBUSY; | |
1274 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1275 | return -EINVAL; | |
1276 | buf[size-1] = 0; | |
0964a3d3 | 1277 | |
3dd98a3b JL |
1278 | recdir = mesg; |
1279 | len = qword_get(&mesg, recdir, size); | |
1280 | if (len <= 0) | |
1281 | return -EINVAL; | |
0964a3d3 | 1282 | |
3dd98a3b JL |
1283 | status = nfs4_reset_recoverydir(recdir); |
1284 | } | |
3d72ab8f CL |
1285 | |
1286 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1287 | nfs4_recoverydir()); | |
0964a3d3 | 1288 | } |
3dd98a3b | 1289 | |
262a0982 CL |
1290 | /** |
1291 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1292 | * | |
1293 | * Input: | |
1294 | * buf: ignored | |
1295 | * size: zero | |
1296 | * | |
1297 | * OR | |
1298 | * | |
1299 | * Input: | |
1300 | * buf: C string containing the pathname | |
1301 | * of the directory on a local file | |
1302 | * system containing permanent NFSv4 | |
1303 | * recovery data | |
1304 | * size: non-zero length of C string in @buf | |
1305 | * Output: | |
1306 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1307 | * containing the current recovery pathname setting; | |
1308 | * return code is the size in bytes of the string | |
1309 | * On error: return code is zero or a negative errno value | |
1310 | */ | |
3dd98a3b JL |
1311 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1312 | { | |
1313 | ssize_t rv; | |
1314 | ||
1315 | mutex_lock(&nfsd_mutex); | |
1316 | rv = __write_recoverydir(file, buf, size); | |
1317 | mutex_unlock(&nfsd_mutex); | |
1318 | return rv; | |
1319 | } | |
1320 | ||
70c3b76c | 1321 | #endif |
0964a3d3 | 1322 | |
1da177e4 LT |
1323 | /*----------------------------------------------------------------------------*/ |
1324 | /* | |
1325 | * populating the filesystem. | |
1326 | */ | |
1327 | ||
1328 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1329 | { | |
1330 | static struct tree_descr nfsd_files[] = { | |
1331 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
1332 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1333 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1334 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1335 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1336 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1337 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1338 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
4373ea84 WC |
1339 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1340 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1341 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1342 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1343 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1344 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1345 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1346 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
70c3b76c | 1347 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1348 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1349 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1350 | #ifdef CONFIG_NFSD_V4 |
1351 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 1352 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1353 | #endif |
1354 | /* last one */ {""} | |
1355 | }; | |
1356 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1357 | } | |
1358 | ||
454e2398 DH |
1359 | static int nfsd_get_sb(struct file_system_type *fs_type, |
1360 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 1361 | { |
454e2398 | 1362 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
1363 | } |
1364 | ||
1365 | static struct file_system_type nfsd_fs_type = { | |
1366 | .owner = THIS_MODULE, | |
1367 | .name = "nfsd", | |
1368 | .get_sb = nfsd_get_sb, | |
1369 | .kill_sb = kill_litter_super, | |
1370 | }; | |
1371 | ||
e331f606 BF |
1372 | #ifdef CONFIG_PROC_FS |
1373 | static int create_proc_exports_entry(void) | |
1374 | { | |
1375 | struct proc_dir_entry *entry; | |
1376 | ||
1377 | entry = proc_mkdir("fs/nfs", NULL); | |
1378 | if (!entry) | |
1379 | return -ENOMEM; | |
9ef2db26 | 1380 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1381 | if (!entry) |
1382 | return -ENOMEM; | |
e331f606 BF |
1383 | return 0; |
1384 | } | |
1385 | #else /* CONFIG_PROC_FS */ | |
1386 | static int create_proc_exports_entry(void) | |
1387 | { | |
1388 | return 0; | |
1389 | } | |
1390 | #endif | |
1391 | ||
1da177e4 LT |
1392 | static int __init init_nfsd(void) |
1393 | { | |
1394 | int retval; | |
1395 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1396 | ||
e8ff2a84 BF |
1397 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1398 | if (retval) | |
1399 | return retval; | |
1da177e4 | 1400 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1401 | retval = nfsd_reply_cache_init(); |
1402 | if (retval) | |
1403 | goto out_free_stat; | |
dbf847ec BF |
1404 | retval = nfsd_export_init(); |
1405 | if (retval) | |
1406 | goto out_free_cache; | |
1da177e4 | 1407 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1408 | retval = nfsd_idmap_init(); |
1409 | if (retval) | |
1410 | goto out_free_lockd; | |
e331f606 BF |
1411 | retval = create_proc_exports_entry(); |
1412 | if (retval) | |
1413 | goto out_free_idmap; | |
1da177e4 | 1414 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1415 | if (retval) |
1416 | goto out_free_all; | |
1417 | return 0; | |
1418 | out_free_all: | |
26808d3f BF |
1419 | remove_proc_entry("fs/nfs/exports", NULL); |
1420 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1421 | out_free_idmap: |
dbf847ec BF |
1422 | nfsd_idmap_shutdown(); |
1423 | out_free_lockd: | |
26808d3f | 1424 | nfsd_lockd_shutdown(); |
e331f606 | 1425 | nfsd_export_shutdown(); |
dbf847ec | 1426 | out_free_cache: |
e331f606 | 1427 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1428 | out_free_stat: |
1429 | nfsd_stat_shutdown(); | |
26808d3f | 1430 | nfsd4_free_slabs(); |
1da177e4 LT |
1431 | return retval; |
1432 | } | |
1433 | ||
1434 | static void __exit exit_nfsd(void) | |
1435 | { | |
1436 | nfsd_export_shutdown(); | |
d5c3428b | 1437 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1438 | remove_proc_entry("fs/nfs/exports", NULL); |
1439 | remove_proc_entry("fs/nfs", NULL); | |
1440 | nfsd_stat_shutdown(); | |
1441 | nfsd_lockd_shutdown(); | |
1da177e4 | 1442 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1443 | nfsd4_free_slabs(); |
1da177e4 LT |
1444 | unregister_filesystem(&nfsd_fs_type); |
1445 | } | |
1446 | ||
1447 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1448 | MODULE_LICENSE("GPL"); | |
1449 | module_init(init_nfsd) | |
1450 | module_exit(exit_nfsd) |