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> |
4116092b | 40 | #include <linux/sunrpc/clnt.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 | 176 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); |
ed2d8aed | 177 | extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); |
03cf6c9f GB |
178 | |
179 | static struct file_operations pool_stats_operations = { | |
180 | .open = nfsd_pool_stats_open, | |
181 | .read = seq_read, | |
182 | .llseek = seq_lseek, | |
ed2d8aed | 183 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
184 | .owner = THIS_MODULE, |
185 | }; | |
186 | ||
1da177e4 LT |
187 | /*----------------------------------------------------------------------------*/ |
188 | /* | |
189 | * payload - write methods | |
1da177e4 LT |
190 | */ |
191 | ||
262a0982 CL |
192 | /** |
193 | * write_svc - Start kernel's NFSD server | |
194 | * | |
195 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
196 | * Function remains to support old versions of nfs-utils. | |
197 | * | |
198 | * Input: | |
199 | * buf: struct nfsctl_svc | |
200 | * svc_port: port number of this | |
201 | * server's listener | |
202 | * svc_nthreads: number of threads to start | |
203 | * size: size in bytes of passed in nfsctl_svc | |
204 | * Output: | |
205 | * On success: returns zero | |
206 | * On error: return code is negative errno value | |
207 | */ | |
1da177e4 LT |
208 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
209 | { | |
210 | struct nfsctl_svc *data; | |
82e12fe9 | 211 | int err; |
1da177e4 LT |
212 | if (size < sizeof(*data)) |
213 | return -EINVAL; | |
214 | data = (struct nfsctl_svc*) buf; | |
82e12fe9 N |
215 | err = nfsd_svc(data->svc_port, data->svc_nthreads); |
216 | if (err < 0) | |
217 | return err; | |
218 | return 0; | |
1da177e4 LT |
219 | } |
220 | ||
262a0982 CL |
221 | /** |
222 | * write_add - Add or modify client entry in auth unix cache | |
223 | * | |
224 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
225 | * Function remains to support old versions of nfs-utils. | |
226 | * | |
227 | * Input: | |
228 | * buf: struct nfsctl_client | |
229 | * cl_ident: '\0'-terminated C string | |
230 | * containing domain name | |
231 | * of client | |
232 | * cl_naddr: no. of items in cl_addrlist | |
233 | * cl_addrlist: array of client addresses | |
234 | * cl_fhkeytype: ignored | |
235 | * cl_fhkeylen: ignored | |
236 | * cl_fhkey: ignored | |
237 | * size: size in bytes of passed in nfsctl_client | |
238 | * Output: | |
239 | * On success: returns zero | |
240 | * On error: return code is negative errno value | |
241 | * | |
242 | * Note: Only AF_INET client addresses are passed in, since | |
243 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
244 | */ | |
1da177e4 LT |
245 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
246 | { | |
247 | struct nfsctl_client *data; | |
248 | if (size < sizeof(*data)) | |
249 | return -EINVAL; | |
250 | data = (struct nfsctl_client *)buf; | |
251 | return exp_addclient(data); | |
252 | } | |
253 | ||
262a0982 CL |
254 | /** |
255 | * write_del - Remove client from auth unix cache | |
256 | * | |
257 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
258 | * Function remains to support old versions of nfs-utils. | |
259 | * | |
260 | * Input: | |
261 | * buf: struct nfsctl_client | |
262 | * cl_ident: '\0'-terminated C string | |
263 | * containing domain name | |
264 | * of client | |
265 | * cl_naddr: ignored | |
266 | * cl_addrlist: ignored | |
267 | * cl_fhkeytype: ignored | |
268 | * cl_fhkeylen: ignored | |
269 | * cl_fhkey: ignored | |
270 | * size: size in bytes of passed in nfsctl_client | |
271 | * Output: | |
272 | * On success: returns zero | |
273 | * On error: return code is negative errno value | |
274 | * | |
275 | * Note: Only AF_INET client addresses are passed in, since | |
276 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
277 | */ | |
1da177e4 LT |
278 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
279 | { | |
280 | struct nfsctl_client *data; | |
281 | if (size < sizeof(*data)) | |
282 | return -EINVAL; | |
283 | data = (struct nfsctl_client *)buf; | |
284 | return exp_delclient(data); | |
285 | } | |
286 | ||
262a0982 CL |
287 | /** |
288 | * write_export - Export part or all of a local file system | |
289 | * | |
290 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
291 | * Function remains to support old versions of nfs-utils. | |
292 | * | |
293 | * Input: | |
294 | * buf: struct nfsctl_export | |
295 | * ex_client: '\0'-terminated C string | |
296 | * containing domain name | |
297 | * of client allowed to access | |
298 | * this export | |
299 | * ex_path: '\0'-terminated C string | |
300 | * containing pathname of | |
301 | * directory in local file system | |
302 | * ex_dev: fsid to use for this export | |
303 | * ex_ino: ignored | |
304 | * ex_flags: export flags for this export | |
305 | * ex_anon_uid: UID to use for anonymous | |
306 | * requests | |
307 | * ex_anon_gid: GID to use for anonymous | |
308 | * requests | |
309 | * size: size in bytes of passed in nfsctl_export | |
310 | * Output: | |
311 | * On success: returns zero | |
312 | * On error: return code is negative errno value | |
313 | */ | |
1da177e4 LT |
314 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
315 | { | |
316 | struct nfsctl_export *data; | |
317 | if (size < sizeof(*data)) | |
318 | return -EINVAL; | |
319 | data = (struct nfsctl_export*)buf; | |
320 | return exp_export(data); | |
321 | } | |
322 | ||
262a0982 CL |
323 | /** |
324 | * write_unexport - Unexport a previously exported file system | |
325 | * | |
326 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
327 | * Function remains to support old versions of nfs-utils. | |
328 | * | |
329 | * Input: | |
330 | * buf: struct nfsctl_export | |
331 | * ex_client: '\0'-terminated C string | |
332 | * containing domain name | |
333 | * of client no longer allowed | |
334 | * to access this export | |
335 | * ex_path: '\0'-terminated C string | |
336 | * containing pathname of | |
337 | * directory in local file system | |
338 | * ex_dev: ignored | |
339 | * ex_ino: ignored | |
340 | * ex_flags: ignored | |
341 | * ex_anon_uid: ignored | |
342 | * ex_anon_gid: ignored | |
343 | * size: size in bytes of passed in nfsctl_export | |
344 | * Output: | |
345 | * On success: returns zero | |
346 | * On error: return code is negative errno value | |
347 | */ | |
1da177e4 LT |
348 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
349 | { | |
350 | struct nfsctl_export *data; | |
351 | ||
352 | if (size < sizeof(*data)) | |
353 | return -EINVAL; | |
354 | data = (struct nfsctl_export*)buf; | |
355 | return exp_unexport(data); | |
356 | } | |
357 | ||
262a0982 CL |
358 | /** |
359 | * write_getfs - Get a variable-length NFS file handle by path | |
360 | * | |
361 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
362 | * Function remains to support old versions of nfs-utils. | |
363 | * | |
364 | * Input: | |
365 | * buf: struct nfsctl_fsparm | |
366 | * gd_addr: socket address of client | |
367 | * gd_path: '\0'-terminated C string | |
368 | * containing pathname of | |
369 | * directory in local file system | |
370 | * gd_maxlen: maximum size of returned file | |
371 | * handle | |
372 | * size: size in bytes of passed in nfsctl_fsparm | |
373 | * Output: | |
374 | * On success: passed-in buffer filled with a knfsd_fh structure | |
375 | * (a variable-length raw NFS file handle); | |
376 | * return code is the size in bytes of the file handle | |
377 | * On error: return code is negative errno value | |
378 | * | |
379 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
380 | * is the same size as a struct sockaddr_in. | |
381 | */ | |
1da177e4 LT |
382 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
383 | { | |
384 | struct nfsctl_fsparm *data; | |
385 | struct sockaddr_in *sin; | |
386 | struct auth_domain *clp; | |
387 | int err = 0; | |
388 | struct knfsd_fh *res; | |
f15364bd | 389 | struct in6_addr in6; |
1da177e4 LT |
390 | |
391 | if (size < sizeof(*data)) | |
392 | return -EINVAL; | |
393 | data = (struct nfsctl_fsparm*)buf; | |
394 | err = -EPROTONOSUPPORT; | |
395 | if (data->gd_addr.sa_family != AF_INET) | |
396 | goto out; | |
397 | sin = (struct sockaddr_in *)&data->gd_addr; | |
398 | if (data->gd_maxlen > NFS3_FHSIZE) | |
399 | data->gd_maxlen = NFS3_FHSIZE; | |
400 | ||
401 | res = (struct knfsd_fh*)buf; | |
402 | ||
403 | exp_readlock(); | |
f15364bd AC |
404 | |
405 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
406 | ||
407 | clp = auth_unix_lookup(&in6); | |
408 | if (!clp) | |
1da177e4 LT |
409 | err = -EPERM; |
410 | else { | |
411 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
412 | auth_domain_put(clp); | |
413 | } | |
414 | exp_readunlock(); | |
415 | if (err == 0) | |
12127498 | 416 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
417 | out: |
418 | return err; | |
419 | } | |
420 | ||
262a0982 CL |
421 | /** |
422 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
423 | * | |
424 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
425 | * Function remains to support old versions of nfs-utils. | |
426 | * | |
427 | * Input: | |
428 | * buf: struct nfsctl_fdparm | |
429 | * gd_addr: socket address of client | |
430 | * gd_path: '\0'-terminated C string | |
431 | * containing pathname of | |
432 | * directory in local file system | |
433 | * gd_version: fdparm structure version | |
434 | * size: size in bytes of passed in nfsctl_fdparm | |
435 | * Output: | |
436 | * On success: passed-in buffer filled with nfsctl_res | |
437 | * (a fixed-length raw NFS file handle); | |
438 | * return code is the size in bytes of the file handle | |
439 | * On error: return code is negative errno value | |
440 | * | |
441 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
442 | * is the same size as a struct sockaddr_in. | |
443 | */ | |
1da177e4 LT |
444 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
445 | { | |
446 | struct nfsctl_fdparm *data; | |
447 | struct sockaddr_in *sin; | |
448 | struct auth_domain *clp; | |
449 | int err = 0; | |
450 | struct knfsd_fh fh; | |
451 | char *res; | |
f15364bd | 452 | struct in6_addr in6; |
1da177e4 LT |
453 | |
454 | if (size < sizeof(*data)) | |
455 | return -EINVAL; | |
456 | data = (struct nfsctl_fdparm*)buf; | |
457 | err = -EPROTONOSUPPORT; | |
458 | if (data->gd_addr.sa_family != AF_INET) | |
459 | goto out; | |
460 | err = -EINVAL; | |
461 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
462 | goto out; | |
463 | ||
464 | res = buf; | |
465 | sin = (struct sockaddr_in *)&data->gd_addr; | |
466 | exp_readlock(); | |
f15364bd AC |
467 | |
468 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
469 | ||
470 | clp = auth_unix_lookup(&in6); | |
471 | if (!clp) | |
1da177e4 LT |
472 | err = -EPERM; |
473 | else { | |
474 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
475 | auth_domain_put(clp); | |
476 | } | |
477 | exp_readunlock(); | |
478 | ||
479 | if (err == 0) { | |
480 | memset(res,0, NFS_FHSIZE); | |
481 | memcpy(res, &fh.fh_base, fh.fh_size); | |
482 | err = NFS_FHSIZE; | |
483 | } | |
484 | out: | |
485 | return err; | |
486 | } | |
487 | ||
262a0982 CL |
488 | /** |
489 | * write_unlock_ip - Release all locks used by a client | |
490 | * | |
491 | * Experimental. | |
492 | * | |
493 | * Input: | |
494 | * buf: '\n'-terminated C string containing a | |
4116092b | 495 | * presentation format IP address |
262a0982 CL |
496 | * size: length of C string in @buf |
497 | * Output: | |
498 | * On success: returns zero if all specified locks were released; | |
499 | * returns one if one or more locks were not released | |
500 | * On error: return code is negative errno value | |
262a0982 | 501 | */ |
b046ccdc | 502 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 503 | { |
4116092b CL |
504 | struct sockaddr_storage address; |
505 | struct sockaddr *sap = (struct sockaddr *)&address; | |
506 | size_t salen = sizeof(address); | |
367c8c7b | 507 | char *fo_path; |
4373ea84 WC |
508 | |
509 | /* sanity check */ | |
510 | if (size == 0) | |
511 | return -EINVAL; | |
512 | ||
513 | if (buf[size-1] != '\n') | |
514 | return -EINVAL; | |
515 | ||
516 | fo_path = buf; | |
517 | if (qword_get(&buf, fo_path, size) < 0) | |
518 | return -EINVAL; | |
519 | ||
4116092b | 520 | if (rpc_pton(fo_path, size, sap, salen) == 0) |
4373ea84 | 521 | return -EINVAL; |
4373ea84 | 522 | |
4116092b | 523 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
524 | } |
525 | ||
262a0982 CL |
526 | /** |
527 | * write_unlock_fs - Release all locks on a local file system | |
528 | * | |
529 | * Experimental. | |
530 | * | |
531 | * Input: | |
532 | * buf: '\n'-terminated C string containing the | |
533 | * absolute pathname of a local file system | |
534 | * size: length of C string in @buf | |
535 | * Output: | |
536 | * On success: returns zero if all specified locks were released; | |
537 | * returns one if one or more locks were not released | |
538 | * On error: return code is negative errno value | |
539 | */ | |
b046ccdc | 540 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 541 | { |
a63bb996 | 542 | struct path path; |
17efa372 WC |
543 | char *fo_path; |
544 | int error; | |
545 | ||
546 | /* sanity check */ | |
547 | if (size == 0) | |
548 | return -EINVAL; | |
549 | ||
550 | if (buf[size-1] != '\n') | |
551 | return -EINVAL; | |
552 | ||
553 | fo_path = buf; | |
554 | if (qword_get(&buf, fo_path, size) < 0) | |
555 | return -EINVAL; | |
556 | ||
a63bb996 | 557 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
558 | if (error) |
559 | return error; | |
560 | ||
262a0982 CL |
561 | /* |
562 | * XXX: Needs better sanity checking. Otherwise we could end up | |
563 | * releasing locks on the wrong file system. | |
564 | * | |
565 | * For example: | |
566 | * 1. Does the path refer to a directory? | |
567 | * 2. Is that directory a mount point, or | |
568 | * 3. Is that directory the root of an exported file system? | |
569 | */ | |
a63bb996 | 570 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 571 | |
a63bb996 | 572 | path_put(&path); |
17efa372 WC |
573 | return error; |
574 | } | |
575 | ||
262a0982 CL |
576 | /** |
577 | * write_filehandle - Get a variable-length NFS file handle by path | |
578 | * | |
579 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
580 | * three alphanumeric words separated by whitespace. The string may | |
581 | * contain escape sequences. | |
582 | * | |
583 | * Input: | |
584 | * buf: | |
585 | * domain: client domain name | |
586 | * path: export pathname | |
587 | * maxsize: numeric maximum size of | |
588 | * @buf | |
589 | * size: length of C string in @buf | |
590 | * Output: | |
591 | * On success: passed-in buffer filled with '\n'-terminated C | |
592 | * string containing a ASCII hex text version | |
593 | * of the NFS file handle; | |
594 | * return code is the size in bytes of the string | |
595 | * On error: return code is negative errno value | |
596 | */ | |
1da177e4 LT |
597 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
598 | { | |
1da177e4 | 599 | char *dname, *path; |
246d95ba | 600 | int uninitialized_var(maxsize); |
1da177e4 LT |
601 | char *mesg = buf; |
602 | int len; | |
603 | struct auth_domain *dom; | |
604 | struct knfsd_fh fh; | |
605 | ||
87d26ea7 BF |
606 | if (size == 0) |
607 | return -EINVAL; | |
608 | ||
1da177e4 LT |
609 | if (buf[size-1] != '\n') |
610 | return -EINVAL; | |
611 | buf[size-1] = 0; | |
612 | ||
613 | dname = mesg; | |
614 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
615 | if (len <= 0) |
616 | return -EINVAL; | |
1da177e4 LT |
617 | |
618 | path = dname+len+1; | |
619 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
620 | if (len <= 0) |
621 | return -EINVAL; | |
1da177e4 LT |
622 | |
623 | len = get_int(&mesg, &maxsize); | |
624 | if (len) | |
625 | return len; | |
626 | ||
627 | if (maxsize < NFS_FHSIZE) | |
628 | return -EINVAL; | |
629 | if (maxsize > NFS3_FHSIZE) | |
630 | maxsize = NFS3_FHSIZE; | |
631 | ||
632 | if (qword_get(&mesg, mesg, size)>0) | |
633 | return -EINVAL; | |
634 | ||
635 | /* we have all the words, they are in buf.. */ | |
636 | dom = unix_domain_find(dname); | |
637 | if (!dom) | |
638 | return -ENOMEM; | |
639 | ||
640 | len = exp_rootfh(dom, path, &fh, maxsize); | |
641 | auth_domain_put(dom); | |
642 | if (len) | |
643 | return len; | |
644 | ||
54224f04 CL |
645 | mesg = buf; |
646 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
647 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
648 | mesg[-1] = '\n'; | |
649 | return mesg - buf; | |
650 | } | |
651 | ||
262a0982 CL |
652 | /** |
653 | * write_threads - Start NFSD, or report the current number of running threads | |
654 | * | |
655 | * Input: | |
656 | * buf: ignored | |
657 | * size: zero | |
658 | * Output: | |
659 | * On success: passed-in buffer filled with '\n'-terminated C | |
660 | * string numeric value representing the number of | |
661 | * running NFSD threads; | |
662 | * return code is the size in bytes of the string | |
663 | * On error: return code is zero | |
664 | * | |
665 | * OR | |
666 | * | |
667 | * Input: | |
668 | * buf: C string containing an unsigned | |
669 | * integer value representing the | |
670 | * number of NFSD threads to start | |
671 | * size: non-zero length of C string in @buf | |
672 | * Output: | |
673 | * On success: NFS service is started; | |
674 | * passed-in buffer filled with '\n'-terminated C | |
675 | * string numeric value representing the number of | |
676 | * running NFSD threads; | |
677 | * return code is the size in bytes of the string | |
678 | * On error: return code is zero or a negative errno value | |
679 | */ | |
1da177e4 LT |
680 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
681 | { | |
1da177e4 LT |
682 | char *mesg = buf; |
683 | int rv; | |
684 | if (size > 0) { | |
685 | int newthreads; | |
686 | rv = get_int(&mesg, &newthreads); | |
687 | if (rv) | |
688 | return rv; | |
9e074856 | 689 | if (newthreads < 0) |
1da177e4 | 690 | return -EINVAL; |
9e074856 | 691 | rv = nfsd_svc(NFS_PORT, newthreads); |
82e12fe9 | 692 | if (rv < 0) |
1da177e4 | 693 | return rv; |
82e12fe9 N |
694 | } else |
695 | rv = nfsd_nrthreads(); | |
e06b6405 | 696 | |
82e12fe9 | 697 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
698 | } |
699 | ||
262a0982 CL |
700 | /** |
701 | * write_pool_threads - Set or report the current number of threads per pool | |
702 | * | |
703 | * Input: | |
704 | * buf: ignored | |
705 | * size: zero | |
706 | * | |
707 | * OR | |
708 | * | |
709 | * Input: | |
710 | * buf: C string containing whitespace- | |
711 | * separated unsigned integer values | |
712 | * representing the number of NFSD | |
713 | * threads to start in each pool | |
714 | * size: non-zero length of C string in @buf | |
715 | * Output: | |
716 | * On success: passed-in buffer filled with '\n'-terminated C | |
717 | * string containing integer values representing the | |
718 | * number of NFSD threads in each pool; | |
719 | * return code is the size in bytes of the string | |
720 | * On error: return code is zero or a negative errno value | |
721 | */ | |
eed2965a GB |
722 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
723 | { | |
724 | /* if size > 0, look for an array of number of threads per node | |
725 | * and apply them then write out number of threads per node as reply | |
726 | */ | |
727 | char *mesg = buf; | |
728 | int i; | |
729 | int rv; | |
730 | int len; | |
bedbdd8b | 731 | int npools; |
eed2965a GB |
732 | int *nthreads; |
733 | ||
bedbdd8b NB |
734 | mutex_lock(&nfsd_mutex); |
735 | npools = nfsd_nrpools(); | |
eed2965a GB |
736 | if (npools == 0) { |
737 | /* | |
738 | * NFS is shut down. The admin can start it by | |
739 | * writing to the threads file but NOT the pool_threads | |
740 | * file, sorry. Report zero threads. | |
741 | */ | |
bedbdd8b | 742 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
743 | strcpy(buf, "0\n"); |
744 | return strlen(buf); | |
745 | } | |
746 | ||
747 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 748 | rv = -ENOMEM; |
eed2965a | 749 | if (nthreads == NULL) |
bedbdd8b | 750 | goto out_free; |
eed2965a GB |
751 | |
752 | if (size > 0) { | |
753 | for (i = 0; i < npools; i++) { | |
754 | rv = get_int(&mesg, &nthreads[i]); | |
755 | if (rv == -ENOENT) | |
756 | break; /* fewer numbers than pools */ | |
757 | if (rv) | |
758 | goto out_free; /* syntax error */ | |
759 | rv = -EINVAL; | |
760 | if (nthreads[i] < 0) | |
761 | goto out_free; | |
762 | } | |
763 | rv = nfsd_set_nrthreads(i, nthreads); | |
764 | if (rv) | |
765 | goto out_free; | |
766 | } | |
767 | ||
768 | rv = nfsd_get_nrthreads(npools, nthreads); | |
769 | if (rv) | |
770 | goto out_free; | |
771 | ||
772 | mesg = buf; | |
773 | size = SIMPLE_TRANSACTION_LIMIT; | |
774 | for (i = 0; i < npools && size > 0; i++) { | |
775 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
776 | len = strlen(mesg); | |
777 | size -= len; | |
778 | mesg += len; | |
779 | } | |
413d63d7 | 780 | rv = mesg - buf; |
eed2965a GB |
781 | out_free: |
782 | kfree(nthreads); | |
bedbdd8b | 783 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
784 | return rv; |
785 | } | |
786 | ||
3dd98a3b | 787 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 788 | { |
70c3b76c | 789 | char *mesg = buf; |
8daf220a | 790 | char *vers, *minorp, sign; |
261758b5 | 791 | int len, num, remaining; |
8daf220a | 792 | unsigned minor; |
70c3b76c N |
793 | ssize_t tlen = 0; |
794 | char *sep; | |
795 | ||
796 | if (size>0) { | |
797 | if (nfsd_serv) | |
6658d3a7 N |
798 | /* Cannot change versions without updating |
799 | * nfsd_serv->sv_xdrsize, and reallocing | |
800 | * rq_argp and rq_resp | |
801 | */ | |
70c3b76c N |
802 | return -EBUSY; |
803 | if (buf[size-1] != '\n') | |
804 | return -EINVAL; | |
805 | buf[size-1] = 0; | |
806 | ||
807 | vers = mesg; | |
808 | len = qword_get(&mesg, vers, size); | |
809 | if (len <= 0) return -EINVAL; | |
810 | do { | |
811 | sign = *vers; | |
812 | if (sign == '+' || sign == '-') | |
8daf220a | 813 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 814 | else |
8daf220a BH |
815 | num = simple_strtol(vers, &minorp, 0); |
816 | if (*minorp == '.') { | |
817 | if (num < 4) | |
818 | return -EINVAL; | |
819 | minor = simple_strtoul(minorp+1, NULL, 0); | |
820 | if (minor == 0) | |
821 | return -EINVAL; | |
822 | if (nfsd_minorversion(minor, sign == '-' ? | |
823 | NFSD_CLEAR : NFSD_SET) < 0) | |
824 | return -EINVAL; | |
825 | goto next; | |
826 | } | |
70c3b76c N |
827 | switch(num) { |
828 | case 2: | |
829 | case 3: | |
830 | case 4: | |
6658d3a7 | 831 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
832 | break; |
833 | default: | |
834 | return -EINVAL; | |
835 | } | |
8daf220a | 836 | next: |
70c3b76c | 837 | vers += len + 1; |
70c3b76c N |
838 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
839 | /* If all get turned off, turn them back on, as | |
840 | * having no versions is BAD | |
841 | */ | |
6658d3a7 | 842 | nfsd_reset_versions(); |
70c3b76c | 843 | } |
261758b5 | 844 | |
70c3b76c N |
845 | /* Now write current state into reply buffer */ |
846 | len = 0; | |
847 | sep = ""; | |
261758b5 | 848 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 849 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 850 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 851 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 852 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
853 | num); |
854 | sep = " "; | |
261758b5 CL |
855 | |
856 | if (len > remaining) | |
857 | break; | |
858 | remaining -= len; | |
859 | buf += len; | |
860 | tlen += len; | |
70c3b76c | 861 | } |
8daf220a | 862 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
863 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
864 | minor++) { | |
865 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
866 | (nfsd_vers(4, NFSD_TEST) && |
867 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
868 | '+' : '-', | |
869 | minor); | |
261758b5 CL |
870 | |
871 | if (len > remaining) | |
872 | break; | |
873 | remaining -= len; | |
874 | buf += len; | |
875 | tlen += len; | |
876 | } | |
877 | ||
878 | len = snprintf(buf, remaining, "\n"); | |
879 | if (len > remaining) | |
880 | return -EINVAL; | |
881 | return tlen + len; | |
70c3b76c N |
882 | } |
883 | ||
262a0982 CL |
884 | /** |
885 | * write_versions - Set or report the available NFS protocol versions | |
886 | * | |
887 | * Input: | |
888 | * buf: ignored | |
889 | * size: zero | |
890 | * Output: | |
891 | * On success: passed-in buffer filled with '\n'-terminated C | |
892 | * string containing positive or negative integer | |
893 | * values representing the current status of each | |
894 | * protocol version; | |
895 | * return code is the size in bytes of the string | |
896 | * On error: return code is zero or a negative errno value | |
897 | * | |
898 | * OR | |
899 | * | |
900 | * Input: | |
901 | * buf: C string containing whitespace- | |
902 | * separated positive or negative | |
903 | * integer values representing NFS | |
904 | * protocol versions to enable ("+n") | |
905 | * or disable ("-n") | |
906 | * size: non-zero length of C string in @buf | |
907 | * Output: | |
908 | * On success: status of zero or more protocol versions has | |
909 | * been updated; passed-in buffer filled with | |
910 | * '\n'-terminated C string containing positive | |
911 | * or negative integer values representing the | |
912 | * current status of each protocol version; | |
913 | * return code is the size in bytes of the string | |
914 | * On error: return code is zero or a negative errno value | |
915 | */ | |
3dd98a3b JL |
916 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
917 | { | |
918 | ssize_t rv; | |
919 | ||
920 | mutex_lock(&nfsd_mutex); | |
921 | rv = __write_versions(file, buf, size); | |
922 | mutex_unlock(&nfsd_mutex); | |
923 | return rv; | |
924 | } | |
925 | ||
0a5372d8 CL |
926 | /* |
927 | * Zero-length write. Return a list of NFSD's current listener | |
928 | * transports. | |
929 | */ | |
930 | static ssize_t __write_ports_names(char *buf) | |
931 | { | |
932 | if (nfsd_serv == NULL) | |
933 | return 0; | |
335c54bd | 934 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
935 | } |
936 | ||
0b7c2f6f CL |
937 | /* |
938 | * A single 'fd' number was written, in which case it must be for | |
939 | * a socket of a supported family/protocol, and we use it as an | |
940 | * nfsd listener. | |
941 | */ | |
942 | static ssize_t __write_ports_addfd(char *buf) | |
943 | { | |
944 | char *mesg = buf; | |
945 | int fd, err; | |
946 | ||
947 | err = get_int(&mesg, &fd); | |
948 | if (err != 0 || fd < 0) | |
949 | return -EINVAL; | |
950 | ||
951 | err = nfsd_create_serv(); | |
952 | if (err != 0) | |
953 | return err; | |
954 | ||
ea068bad CL |
955 | err = lockd_up(); |
956 | if (err != 0) | |
957 | goto out; | |
0b7c2f6f | 958 | |
bfba9ab4 | 959 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
ea068bad CL |
960 | if (err < 0) |
961 | lockd_down(); | |
0b7c2f6f | 962 | |
ea068bad CL |
963 | out: |
964 | /* Decrease the count, but don't shut down the service */ | |
965 | nfsd_serv->sv_nrthreads--; | |
966 | return err; | |
0b7c2f6f CL |
967 | } |
968 | ||
82d56591 CL |
969 | /* |
970 | * A '-' followed by the 'name' of a socket means we close the socket. | |
971 | */ | |
972 | static ssize_t __write_ports_delfd(char *buf) | |
973 | { | |
974 | char *toclose; | |
975 | int len = 0; | |
976 | ||
977 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
978 | if (toclose == NULL) | |
979 | return -ENOMEM; | |
980 | ||
981 | if (nfsd_serv != NULL) | |
8435d34d CL |
982 | len = svc_sock_names(nfsd_serv, buf, |
983 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
82d56591 CL |
984 | if (len >= 0) |
985 | lockd_down(); | |
986 | ||
987 | kfree(toclose); | |
988 | return len; | |
989 | } | |
990 | ||
4eb68c26 CL |
991 | /* |
992 | * A transport listener is added by writing it's transport name and | |
993 | * a port number. | |
994 | */ | |
995 | static ssize_t __write_ports_addxprt(char *buf) | |
996 | { | |
997 | char transport[16]; | |
998 | int port, err; | |
999 | ||
1000 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
1001 | return -EINVAL; | |
1002 | ||
1003 | if (port < 1 || port > USHORT_MAX) | |
1004 | return -EINVAL; | |
1005 | ||
1006 | err = nfsd_create_serv(); | |
1007 | if (err != 0) | |
1008 | return err; | |
1009 | ||
1010 | err = svc_create_xprt(nfsd_serv, transport, | |
1011 | PF_INET, port, SVC_SOCK_ANONYMOUS); | |
1012 | if (err < 0) { | |
1013 | /* Give a reasonable perror msg for bad transport string */ | |
1014 | if (err == -ENOENT) | |
1015 | err = -EPROTONOSUPPORT; | |
1016 | return err; | |
1017 | } | |
1018 | return 0; | |
1019 | } | |
1020 | ||
4cd5dc75 CL |
1021 | /* |
1022 | * A transport listener is removed by writing a "-", it's transport | |
1023 | * name, and it's port number. | |
1024 | */ | |
1025 | static ssize_t __write_ports_delxprt(char *buf) | |
1026 | { | |
1027 | struct svc_xprt *xprt; | |
1028 | char transport[16]; | |
1029 | int port; | |
1030 | ||
1031 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
1032 | return -EINVAL; | |
1033 | ||
1034 | if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL) | |
1035 | return -EINVAL; | |
1036 | ||
1037 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
1038 | if (xprt == NULL) | |
1039 | return -ENOTCONN; | |
1040 | ||
1041 | svc_close_xprt(xprt); | |
1042 | svc_xprt_put(xprt); | |
1043 | return 0; | |
1044 | } | |
1045 | ||
bedbdd8b | 1046 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 1047 | { |
0a5372d8 CL |
1048 | if (size == 0) |
1049 | return __write_ports_names(buf); | |
0b7c2f6f CL |
1050 | |
1051 | if (isdigit(buf[0])) | |
1052 | return __write_ports_addfd(buf); | |
82d56591 CL |
1053 | |
1054 | if (buf[0] == '-' && isdigit(buf[1])) | |
1055 | return __write_ports_delfd(buf); | |
4eb68c26 CL |
1056 | |
1057 | if (isalpha(buf[0])) | |
1058 | return __write_ports_addxprt(buf); | |
4cd5dc75 CL |
1059 | |
1060 | if (buf[0] == '-' && isalpha(buf[1])) | |
1061 | return __write_ports_delxprt(buf); | |
1062 | ||
b41b66d6 | 1063 | return -EINVAL; |
80212d59 N |
1064 | } |
1065 | ||
262a0982 CL |
1066 | /** |
1067 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
1068 | * | |
1069 | * Input: | |
1070 | * buf: ignored | |
1071 | * size: zero | |
1072 | * Output: | |
1073 | * On success: passed-in buffer filled with a '\n'-terminated C | |
1074 | * string containing a whitespace-separated list of | |
1075 | * named NFSD listeners; | |
1076 | * return code is the size in bytes of the string | |
1077 | * On error: return code is zero or a negative errno value | |
1078 | * | |
1079 | * OR | |
1080 | * | |
1081 | * Input: | |
1082 | * buf: C string containing an unsigned | |
1083 | * integer value representing a bound | |
1084 | * but unconnected socket that is to be | |
c71206a7 CL |
1085 | * used as an NFSD listener; listen(3) |
1086 | * must be called for a SOCK_STREAM | |
1087 | * socket, otherwise it is ignored | |
262a0982 CL |
1088 | * size: non-zero length of C string in @buf |
1089 | * Output: | |
1090 | * On success: NFS service is started; | |
1091 | * passed-in buffer filled with a '\n'-terminated C | |
1092 | * string containing a unique alphanumeric name of | |
1093 | * the listener; | |
1094 | * return code is the size in bytes of the string | |
1095 | * On error: return code is a negative errno value | |
1096 | * | |
1097 | * OR | |
1098 | * | |
1099 | * Input: | |
1100 | * buf: C string containing a "-" followed | |
1101 | * by an integer value representing a | |
1102 | * previously passed in socket file | |
1103 | * descriptor | |
1104 | * size: non-zero length of C string in @buf | |
1105 | * Output: | |
1106 | * On success: NFS service no longer listens on that socket; | |
1107 | * passed-in buffer filled with a '\n'-terminated C | |
1108 | * string containing a unique name of the listener; | |
1109 | * return code is the size in bytes of the string | |
1110 | * On error: return code is a negative errno value | |
1111 | * | |
1112 | * OR | |
1113 | * | |
1114 | * Input: | |
1115 | * buf: C string containing a transport | |
1116 | * name and an unsigned integer value | |
1117 | * representing the port to listen on, | |
1118 | * separated by whitespace | |
1119 | * size: non-zero length of C string in @buf | |
1120 | * Output: | |
1121 | * On success: returns zero; NFS service is started | |
1122 | * On error: return code is a negative errno value | |
1123 | * | |
1124 | * OR | |
1125 | * | |
1126 | * Input: | |
1127 | * buf: C string containing a "-" followed | |
1128 | * by a transport name and an unsigned | |
1129 | * integer value representing the port | |
1130 | * to listen on, separated by whitespace | |
1131 | * size: non-zero length of C string in @buf | |
1132 | * Output: | |
1133 | * On success: returns zero; NFS service no longer listens | |
1134 | * on that transport | |
1135 | * On error: return code is a negative errno value | |
1136 | */ | |
bedbdd8b NB |
1137 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
1138 | { | |
1139 | ssize_t rv; | |
3dd98a3b | 1140 | |
bedbdd8b NB |
1141 | mutex_lock(&nfsd_mutex); |
1142 | rv = __write_ports(file, buf, size); | |
1143 | mutex_unlock(&nfsd_mutex); | |
1144 | return rv; | |
1145 | } | |
1146 | ||
1147 | ||
596bbe53 N |
1148 | int nfsd_max_blksize; |
1149 | ||
262a0982 CL |
1150 | /** |
1151 | * write_maxblksize - Set or report the current NFS blksize | |
1152 | * | |
1153 | * Input: | |
1154 | * buf: ignored | |
1155 | * size: zero | |
1156 | * | |
1157 | * OR | |
1158 | * | |
1159 | * Input: | |
1160 | * buf: C string containing an unsigned | |
1161 | * integer value representing the new | |
1162 | * NFS blksize | |
1163 | * size: non-zero length of C string in @buf | |
1164 | * Output: | |
1165 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1166 | * containing numeric value of the current NFS blksize | |
1167 | * setting; | |
1168 | * return code is the size in bytes of the string | |
1169 | * On error: return code is zero or a negative errno value | |
1170 | */ | |
596bbe53 N |
1171 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
1172 | { | |
1173 | char *mesg = buf; | |
1174 | if (size > 0) { | |
1175 | int bsize; | |
1176 | int rv = get_int(&mesg, &bsize); | |
1177 | if (rv) | |
1178 | return rv; | |
1179 | /* force bsize into allowed range and | |
1180 | * required alignment. | |
1181 | */ | |
1182 | if (bsize < 1024) | |
1183 | bsize = 1024; | |
1184 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1185 | bsize = NFSSVC_MAXBLKSIZE; | |
1186 | bsize &= ~(1024-1); | |
bedbdd8b | 1187 | mutex_lock(&nfsd_mutex); |
596bbe53 | 1188 | if (nfsd_serv && nfsd_serv->sv_nrthreads) { |
bedbdd8b | 1189 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1190 | return -EBUSY; |
1191 | } | |
1192 | nfsd_max_blksize = bsize; | |
bedbdd8b | 1193 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 1194 | } |
e06b6405 CL |
1195 | |
1196 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
1197 | nfsd_max_blksize); | |
596bbe53 N |
1198 | } |
1199 | ||
70c3b76c | 1200 | #ifdef CONFIG_NFSD_V4 |
1da177e4 LT |
1201 | extern time_t nfs4_leasetime(void); |
1202 | ||
3dd98a3b | 1203 | static ssize_t __write_leasetime(struct file *file, char *buf, size_t size) |
1da177e4 LT |
1204 | { |
1205 | /* if size > 10 seconds, call | |
1206 | * nfs4_reset_lease() then write out the new lease (seconds) as reply | |
1207 | */ | |
1208 | char *mesg = buf; | |
3dd98a3b | 1209 | int rv, lease; |
1da177e4 LT |
1210 | |
1211 | if (size > 0) { | |
3dd98a3b JL |
1212 | if (nfsd_serv) |
1213 | return -EBUSY; | |
1da177e4 LT |
1214 | rv = get_int(&mesg, &lease); |
1215 | if (rv) | |
1216 | return rv; | |
1217 | if (lease < 10 || lease > 3600) | |
1218 | return -EINVAL; | |
1219 | nfs4_reset_lease(lease); | |
1220 | } | |
e06b6405 CL |
1221 | |
1222 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", | |
1223 | nfs4_lease_time()); | |
1da177e4 LT |
1224 | } |
1225 | ||
262a0982 CL |
1226 | /** |
1227 | * write_leasetime - Set or report the current NFSv4 lease time | |
1228 | * | |
1229 | * Input: | |
1230 | * buf: ignored | |
1231 | * size: zero | |
1232 | * | |
1233 | * OR | |
1234 | * | |
1235 | * Input: | |
1236 | * buf: C string containing an unsigned | |
1237 | * integer value representing the new | |
1238 | * NFSv4 lease expiry time | |
1239 | * size: non-zero length of C string in @buf | |
1240 | * Output: | |
1241 | * On success: passed-in buffer filled with '\n'-terminated C | |
1242 | * string containing unsigned integer value of the | |
1243 | * current lease expiry time; | |
1244 | * return code is the size in bytes of the string | |
1245 | * On error: return code is zero or a negative errno value | |
1246 | */ | |
3dd98a3b JL |
1247 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1248 | { | |
1249 | ssize_t rv; | |
1250 | ||
1251 | mutex_lock(&nfsd_mutex); | |
1252 | rv = __write_leasetime(file, buf, size); | |
1253 | mutex_unlock(&nfsd_mutex); | |
1254 | return rv; | |
1255 | } | |
1256 | ||
1257 | extern char *nfs4_recoverydir(void); | |
1258 | ||
1259 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
1260 | { |
1261 | char *mesg = buf; | |
1262 | char *recdir; | |
1263 | int len, status; | |
1264 | ||
3dd98a3b JL |
1265 | if (size > 0) { |
1266 | if (nfsd_serv) | |
1267 | return -EBUSY; | |
1268 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1269 | return -EINVAL; | |
1270 | buf[size-1] = 0; | |
0964a3d3 | 1271 | |
3dd98a3b JL |
1272 | recdir = mesg; |
1273 | len = qword_get(&mesg, recdir, size); | |
1274 | if (len <= 0) | |
1275 | return -EINVAL; | |
0964a3d3 | 1276 | |
3dd98a3b JL |
1277 | status = nfs4_reset_recoverydir(recdir); |
1278 | } | |
3d72ab8f CL |
1279 | |
1280 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1281 | nfs4_recoverydir()); | |
0964a3d3 | 1282 | } |
3dd98a3b | 1283 | |
262a0982 CL |
1284 | /** |
1285 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1286 | * | |
1287 | * Input: | |
1288 | * buf: ignored | |
1289 | * size: zero | |
1290 | * | |
1291 | * OR | |
1292 | * | |
1293 | * Input: | |
1294 | * buf: C string containing the pathname | |
1295 | * of the directory on a local file | |
1296 | * system containing permanent NFSv4 | |
1297 | * recovery data | |
1298 | * size: non-zero length of C string in @buf | |
1299 | * Output: | |
1300 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1301 | * containing the current recovery pathname setting; | |
1302 | * return code is the size in bytes of the string | |
1303 | * On error: return code is zero or a negative errno value | |
1304 | */ | |
3dd98a3b JL |
1305 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1306 | { | |
1307 | ssize_t rv; | |
1308 | ||
1309 | mutex_lock(&nfsd_mutex); | |
1310 | rv = __write_recoverydir(file, buf, size); | |
1311 | mutex_unlock(&nfsd_mutex); | |
1312 | return rv; | |
1313 | } | |
1314 | ||
70c3b76c | 1315 | #endif |
0964a3d3 | 1316 | |
1da177e4 LT |
1317 | /*----------------------------------------------------------------------------*/ |
1318 | /* | |
1319 | * populating the filesystem. | |
1320 | */ | |
1321 | ||
1322 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1323 | { | |
1324 | static struct tree_descr nfsd_files[] = { | |
1325 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, | |
1326 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1327 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1328 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1329 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1330 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1331 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1332 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, | |
4373ea84 WC |
1333 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1334 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1335 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1336 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1337 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1338 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1339 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1340 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
70c3b76c | 1341 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1342 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1343 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1344 | #ifdef CONFIG_NFSD_V4 |
1345 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
0964a3d3 | 1346 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1347 | #endif |
1348 | /* last one */ {""} | |
1349 | }; | |
1350 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1351 | } | |
1352 | ||
454e2398 DH |
1353 | static int nfsd_get_sb(struct file_system_type *fs_type, |
1354 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 1355 | { |
454e2398 | 1356 | return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); |
1da177e4 LT |
1357 | } |
1358 | ||
1359 | static struct file_system_type nfsd_fs_type = { | |
1360 | .owner = THIS_MODULE, | |
1361 | .name = "nfsd", | |
1362 | .get_sb = nfsd_get_sb, | |
1363 | .kill_sb = kill_litter_super, | |
1364 | }; | |
1365 | ||
e331f606 BF |
1366 | #ifdef CONFIG_PROC_FS |
1367 | static int create_proc_exports_entry(void) | |
1368 | { | |
1369 | struct proc_dir_entry *entry; | |
1370 | ||
1371 | entry = proc_mkdir("fs/nfs", NULL); | |
1372 | if (!entry) | |
1373 | return -ENOMEM; | |
9ef2db26 | 1374 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1375 | if (!entry) |
1376 | return -ENOMEM; | |
e331f606 BF |
1377 | return 0; |
1378 | } | |
1379 | #else /* CONFIG_PROC_FS */ | |
1380 | static int create_proc_exports_entry(void) | |
1381 | { | |
1382 | return 0; | |
1383 | } | |
1384 | #endif | |
1385 | ||
1da177e4 LT |
1386 | static int __init init_nfsd(void) |
1387 | { | |
1388 | int retval; | |
1389 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1390 | ||
e8ff2a84 BF |
1391 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1392 | if (retval) | |
1393 | return retval; | |
1da177e4 | 1394 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1395 | retval = nfsd_reply_cache_init(); |
1396 | if (retval) | |
1397 | goto out_free_stat; | |
dbf847ec BF |
1398 | retval = nfsd_export_init(); |
1399 | if (retval) | |
1400 | goto out_free_cache; | |
1da177e4 | 1401 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1402 | retval = nfsd_idmap_init(); |
1403 | if (retval) | |
1404 | goto out_free_lockd; | |
e331f606 BF |
1405 | retval = create_proc_exports_entry(); |
1406 | if (retval) | |
1407 | goto out_free_idmap; | |
1da177e4 | 1408 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1409 | if (retval) |
1410 | goto out_free_all; | |
1411 | return 0; | |
1412 | out_free_all: | |
26808d3f BF |
1413 | remove_proc_entry("fs/nfs/exports", NULL); |
1414 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1415 | out_free_idmap: |
dbf847ec BF |
1416 | nfsd_idmap_shutdown(); |
1417 | out_free_lockd: | |
26808d3f | 1418 | nfsd_lockd_shutdown(); |
e331f606 | 1419 | nfsd_export_shutdown(); |
dbf847ec | 1420 | out_free_cache: |
e331f606 | 1421 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1422 | out_free_stat: |
1423 | nfsd_stat_shutdown(); | |
26808d3f | 1424 | nfsd4_free_slabs(); |
1da177e4 LT |
1425 | return retval; |
1426 | } | |
1427 | ||
1428 | static void __exit exit_nfsd(void) | |
1429 | { | |
1430 | nfsd_export_shutdown(); | |
d5c3428b | 1431 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1432 | remove_proc_entry("fs/nfs/exports", NULL); |
1433 | remove_proc_entry("fs/nfs", NULL); | |
1434 | nfsd_stat_shutdown(); | |
1435 | nfsd_lockd_shutdown(); | |
1da177e4 | 1436 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1437 | nfsd4_free_slabs(); |
1da177e4 LT |
1438 | unregister_filesystem(&nfsd_fs_type); |
1439 | } | |
1440 | ||
1441 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1442 | MODULE_LICENSE("GPL"); | |
1443 | module_init(init_nfsd) | |
1444 | module_exit(exit_nfsd) |