Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Syscall interface to knfsd. |
3 | * | |
4 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
5 | */ | |
6 | ||
5a0e3ad6 | 7 | #include <linux/slab.h> |
3f8206d4 | 8 | #include <linux/namei.h> |
b41b66d6 | 9 | #include <linux/ctype.h> |
1da177e4 | 10 | |
1da177e4 | 11 | #include <linux/nfsd_idmap.h> |
80212d59 | 12 | #include <linux/sunrpc/svcsock.h> |
1da177e4 | 13 | #include <linux/nfsd/syscall.h> |
4373ea84 | 14 | #include <linux/lockd/lockd.h> |
4116092b | 15 | #include <linux/sunrpc/clnt.h> |
1da177e4 | 16 | |
9a74af21 BH |
17 | #include "nfsd.h" |
18 | #include "cache.h" | |
19 | ||
1da177e4 LT |
20 | /* |
21 | * We have a single directory with 9 nodes in it. | |
22 | */ | |
23 | enum { | |
24 | NFSD_Root = 1, | |
1e140567 | 25 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
26 | NFSD_Svc, |
27 | NFSD_Add, | |
28 | NFSD_Del, | |
29 | NFSD_Export, | |
30 | NFSD_Unexport, | |
31 | NFSD_Getfd, | |
32 | NFSD_Getfs, | |
1e140567 | 33 | #endif |
1da177e4 | 34 | NFSD_List, |
e8e8753f | 35 | NFSD_Export_features, |
1da177e4 | 36 | NFSD_Fh, |
4373ea84 | 37 | NFSD_FO_UnlockIP, |
17efa372 | 38 | NFSD_FO_UnlockFS, |
1da177e4 | 39 | NFSD_Threads, |
eed2965a | 40 | NFSD_Pool_Threads, |
03cf6c9f | 41 | NFSD_Pool_Stats, |
70c3b76c | 42 | NFSD_Versions, |
80212d59 | 43 | NFSD_Ports, |
596bbe53 | 44 | NFSD_MaxBlkSize, |
70c3b76c N |
45 | /* |
46 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
47 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
48 | */ | |
49 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 50 | NFSD_Leasetime, |
efc4bb4f | 51 | NFSD_Gracetime, |
0964a3d3 | 52 | NFSD_RecoveryDir, |
70c3b76c | 53 | #endif |
1da177e4 LT |
54 | }; |
55 | ||
56 | /* | |
57 | * write() for these nodes. | |
58 | */ | |
1e140567 | 59 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
60 | static ssize_t write_svc(struct file *file, char *buf, size_t size); |
61 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
62 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
63 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
64 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
65 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
66 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
1e140567 | 67 | #endif |
1da177e4 | 68 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
69 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
70 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 71 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 72 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 73 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 74 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 75 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 76 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 77 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 78 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 79 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 80 | #endif |
1da177e4 LT |
81 | |
82 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
1e140567 | 83 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
84 | [NFSD_Svc] = write_svc, |
85 | [NFSD_Add] = write_add, | |
86 | [NFSD_Del] = write_del, | |
87 | [NFSD_Export] = write_export, | |
88 | [NFSD_Unexport] = write_unexport, | |
89 | [NFSD_Getfd] = write_getfd, | |
90 | [NFSD_Getfs] = write_getfs, | |
1e140567 | 91 | #endif |
1da177e4 | 92 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
93 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
94 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 95 | [NFSD_Threads] = write_threads, |
eed2965a | 96 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 97 | [NFSD_Versions] = write_versions, |
80212d59 | 98 | [NFSD_Ports] = write_ports, |
596bbe53 | 99 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 100 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 101 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 102 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 103 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 104 | #endif |
1da177e4 LT |
105 | }; |
106 | ||
107 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
108 | { | |
7eaa36e2 | 109 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
110 | char *data; |
111 | ssize_t rv; | |
112 | ||
e8c96f8c | 113 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
114 | return -EINVAL; |
115 | ||
116 | data = simple_transaction_get(file, buf, size); | |
117 | if (IS_ERR(data)) | |
118 | return PTR_ERR(data); | |
119 | ||
120 | rv = write_op[ino](file, data, size); | |
8971a101 | 121 | if (rv >= 0) { |
1da177e4 LT |
122 | simple_transaction_set(file, rv); |
123 | rv = size; | |
124 | } | |
125 | return rv; | |
126 | } | |
127 | ||
7390022d N |
128 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
129 | { | |
c67874f9 N |
130 | static int warned; |
131 | if (file->f_dentry->d_name.name[0] == '.' && !warned) { | |
c67874f9 N |
132 | printk(KERN_INFO |
133 | "Warning: \"%s\" uses deprecated NFSD interface: %s." | |
134 | " This will be removed in 2.6.40\n", | |
049ef27b | 135 | current->comm, file->f_dentry->d_name.name); |
c67874f9 N |
136 | warned = 1; |
137 | } | |
7390022d N |
138 | if (! file->private_data) { |
139 | /* An attempt to read a transaction file without writing | |
140 | * causes a 0-byte write so that the file can return | |
141 | * state information | |
142 | */ | |
143 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
144 | if (rv < 0) | |
145 | return rv; | |
146 | } | |
147 | return simple_transaction_read(file, buf, size, pos); | |
148 | } | |
149 | ||
4b6f5d20 | 150 | static const struct file_operations transaction_ops = { |
1da177e4 | 151 | .write = nfsctl_transaction_write, |
7390022d | 152 | .read = nfsctl_transaction_read, |
1da177e4 | 153 | .release = simple_transaction_release, |
6038f373 | 154 | .llseek = default_llseek, |
1da177e4 LT |
155 | }; |
156 | ||
1da177e4 LT |
157 | static int exports_open(struct inode *inode, struct file *file) |
158 | { | |
159 | return seq_open(file, &nfs_exports_op); | |
160 | } | |
161 | ||
4b6f5d20 | 162 | static const struct file_operations exports_operations = { |
1da177e4 LT |
163 | .open = exports_open, |
164 | .read = seq_read, | |
165 | .llseek = seq_lseek, | |
166 | .release = seq_release, | |
9ef2db26 | 167 | .owner = THIS_MODULE, |
1da177e4 LT |
168 | }; |
169 | ||
e8e8753f BF |
170 | static int export_features_show(struct seq_file *m, void *v) |
171 | { | |
172 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static int export_features_open(struct inode *inode, struct file *file) | |
177 | { | |
178 | return single_open(file, export_features_show, NULL); | |
179 | } | |
180 | ||
181 | static struct file_operations export_features_operations = { | |
182 | .open = export_features_open, | |
183 | .read = seq_read, | |
184 | .llseek = seq_lseek, | |
185 | .release = single_release, | |
186 | }; | |
187 | ||
03cf6c9f | 188 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); |
ed2d8aed | 189 | extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); |
03cf6c9f | 190 | |
828c0950 | 191 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
192 | .open = nfsd_pool_stats_open, |
193 | .read = seq_read, | |
194 | .llseek = seq_lseek, | |
ed2d8aed | 195 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
196 | .owner = THIS_MODULE, |
197 | }; | |
198 | ||
1da177e4 LT |
199 | /*----------------------------------------------------------------------------*/ |
200 | /* | |
201 | * payload - write methods | |
1da177e4 LT |
202 | */ |
203 | ||
1e140567 | 204 | #ifdef CONFIG_NFSD_DEPRECATED |
262a0982 CL |
205 | /** |
206 | * write_svc - Start kernel's NFSD server | |
207 | * | |
208 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
209 | * Function remains to support old versions of nfs-utils. | |
210 | * | |
211 | * Input: | |
212 | * buf: struct nfsctl_svc | |
213 | * svc_port: port number of this | |
214 | * server's listener | |
215 | * svc_nthreads: number of threads to start | |
216 | * size: size in bytes of passed in nfsctl_svc | |
217 | * Output: | |
218 | * On success: returns zero | |
219 | * On error: return code is negative errno value | |
220 | */ | |
1da177e4 LT |
221 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
222 | { | |
223 | struct nfsctl_svc *data; | |
82e12fe9 | 224 | int err; |
1da177e4 LT |
225 | if (size < sizeof(*data)) |
226 | return -EINVAL; | |
227 | data = (struct nfsctl_svc*) buf; | |
82e12fe9 N |
228 | err = nfsd_svc(data->svc_port, data->svc_nthreads); |
229 | if (err < 0) | |
230 | return err; | |
231 | return 0; | |
1da177e4 LT |
232 | } |
233 | ||
262a0982 CL |
234 | /** |
235 | * write_add - Add or modify client entry in auth unix cache | |
236 | * | |
237 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
238 | * Function remains to support old versions of nfs-utils. | |
239 | * | |
240 | * Input: | |
241 | * buf: struct nfsctl_client | |
242 | * cl_ident: '\0'-terminated C string | |
243 | * containing domain name | |
244 | * of client | |
245 | * cl_naddr: no. of items in cl_addrlist | |
246 | * cl_addrlist: array of client addresses | |
247 | * cl_fhkeytype: ignored | |
248 | * cl_fhkeylen: ignored | |
249 | * cl_fhkey: ignored | |
250 | * size: size in bytes of passed in nfsctl_client | |
251 | * Output: | |
252 | * On success: returns zero | |
253 | * On error: return code is negative errno value | |
254 | * | |
255 | * Note: Only AF_INET client addresses are passed in, since | |
256 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
257 | */ | |
1da177e4 LT |
258 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
259 | { | |
260 | struct nfsctl_client *data; | |
261 | if (size < sizeof(*data)) | |
262 | return -EINVAL; | |
263 | data = (struct nfsctl_client *)buf; | |
264 | return exp_addclient(data); | |
265 | } | |
266 | ||
262a0982 CL |
267 | /** |
268 | * write_del - Remove client from auth unix cache | |
269 | * | |
270 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
271 | * Function remains to support old versions of nfs-utils. | |
272 | * | |
273 | * Input: | |
274 | * buf: struct nfsctl_client | |
275 | * cl_ident: '\0'-terminated C string | |
276 | * containing domain name | |
277 | * of client | |
278 | * cl_naddr: ignored | |
279 | * cl_addrlist: ignored | |
280 | * cl_fhkeytype: ignored | |
281 | * cl_fhkeylen: ignored | |
282 | * cl_fhkey: ignored | |
283 | * size: size in bytes of passed in nfsctl_client | |
284 | * Output: | |
285 | * On success: returns zero | |
286 | * On error: return code is negative errno value | |
287 | * | |
288 | * Note: Only AF_INET client addresses are passed in, since | |
289 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
290 | */ | |
1da177e4 LT |
291 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
292 | { | |
293 | struct nfsctl_client *data; | |
294 | if (size < sizeof(*data)) | |
295 | return -EINVAL; | |
296 | data = (struct nfsctl_client *)buf; | |
297 | return exp_delclient(data); | |
298 | } | |
299 | ||
262a0982 CL |
300 | /** |
301 | * write_export - Export part or all of a local file system | |
302 | * | |
303 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
304 | * Function remains to support old versions of nfs-utils. | |
305 | * | |
306 | * Input: | |
307 | * buf: struct nfsctl_export | |
308 | * ex_client: '\0'-terminated C string | |
309 | * containing domain name | |
310 | * of client allowed to access | |
311 | * this export | |
312 | * ex_path: '\0'-terminated C string | |
313 | * containing pathname of | |
314 | * directory in local file system | |
315 | * ex_dev: fsid to use for this export | |
316 | * ex_ino: ignored | |
317 | * ex_flags: export flags for this export | |
318 | * ex_anon_uid: UID to use for anonymous | |
319 | * requests | |
320 | * ex_anon_gid: GID to use for anonymous | |
321 | * requests | |
322 | * size: size in bytes of passed in nfsctl_export | |
323 | * Output: | |
324 | * On success: returns zero | |
325 | * On error: return code is negative errno value | |
326 | */ | |
1da177e4 LT |
327 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
328 | { | |
329 | struct nfsctl_export *data; | |
330 | if (size < sizeof(*data)) | |
331 | return -EINVAL; | |
332 | data = (struct nfsctl_export*)buf; | |
333 | return exp_export(data); | |
334 | } | |
335 | ||
262a0982 CL |
336 | /** |
337 | * write_unexport - Unexport a previously exported file system | |
338 | * | |
339 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
340 | * Function remains to support old versions of nfs-utils. | |
341 | * | |
342 | * Input: | |
343 | * buf: struct nfsctl_export | |
344 | * ex_client: '\0'-terminated C string | |
345 | * containing domain name | |
346 | * of client no longer allowed | |
347 | * to access this export | |
348 | * ex_path: '\0'-terminated C string | |
349 | * containing pathname of | |
350 | * directory in local file system | |
351 | * ex_dev: ignored | |
352 | * ex_ino: ignored | |
353 | * ex_flags: ignored | |
354 | * ex_anon_uid: ignored | |
355 | * ex_anon_gid: ignored | |
356 | * size: size in bytes of passed in nfsctl_export | |
357 | * Output: | |
358 | * On success: returns zero | |
359 | * On error: return code is negative errno value | |
360 | */ | |
1da177e4 LT |
361 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
362 | { | |
363 | struct nfsctl_export *data; | |
364 | ||
365 | if (size < sizeof(*data)) | |
366 | return -EINVAL; | |
367 | data = (struct nfsctl_export*)buf; | |
368 | return exp_unexport(data); | |
369 | } | |
370 | ||
262a0982 CL |
371 | /** |
372 | * write_getfs - Get a variable-length NFS file handle by path | |
373 | * | |
374 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
375 | * Function remains to support old versions of nfs-utils. | |
376 | * | |
377 | * Input: | |
378 | * buf: struct nfsctl_fsparm | |
379 | * gd_addr: socket address of client | |
380 | * gd_path: '\0'-terminated C string | |
381 | * containing pathname of | |
382 | * directory in local file system | |
383 | * gd_maxlen: maximum size of returned file | |
384 | * handle | |
385 | * size: size in bytes of passed in nfsctl_fsparm | |
386 | * Output: | |
387 | * On success: passed-in buffer filled with a knfsd_fh structure | |
388 | * (a variable-length raw NFS file handle); | |
389 | * return code is the size in bytes of the file handle | |
390 | * On error: return code is negative errno value | |
391 | * | |
392 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
393 | * is the same size as a struct sockaddr_in. | |
394 | */ | |
1da177e4 LT |
395 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
396 | { | |
397 | struct nfsctl_fsparm *data; | |
398 | struct sockaddr_in *sin; | |
399 | struct auth_domain *clp; | |
400 | int err = 0; | |
401 | struct knfsd_fh *res; | |
f15364bd | 402 | struct in6_addr in6; |
1da177e4 LT |
403 | |
404 | if (size < sizeof(*data)) | |
405 | return -EINVAL; | |
406 | data = (struct nfsctl_fsparm*)buf; | |
407 | err = -EPROTONOSUPPORT; | |
408 | if (data->gd_addr.sa_family != AF_INET) | |
409 | goto out; | |
410 | sin = (struct sockaddr_in *)&data->gd_addr; | |
411 | if (data->gd_maxlen > NFS3_FHSIZE) | |
412 | data->gd_maxlen = NFS3_FHSIZE; | |
413 | ||
414 | res = (struct knfsd_fh*)buf; | |
415 | ||
416 | exp_readlock(); | |
f15364bd AC |
417 | |
418 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
419 | ||
352114f3 | 420 | clp = auth_unix_lookup(&init_net, &in6); |
f15364bd | 421 | if (!clp) |
1da177e4 LT |
422 | err = -EPERM; |
423 | else { | |
424 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
425 | auth_domain_put(clp); | |
426 | } | |
427 | exp_readunlock(); | |
428 | if (err == 0) | |
12127498 | 429 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
430 | out: |
431 | return err; | |
432 | } | |
433 | ||
262a0982 CL |
434 | /** |
435 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
436 | * | |
437 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
438 | * Function remains to support old versions of nfs-utils. | |
439 | * | |
440 | * Input: | |
441 | * buf: struct nfsctl_fdparm | |
442 | * gd_addr: socket address of client | |
443 | * gd_path: '\0'-terminated C string | |
444 | * containing pathname of | |
445 | * directory in local file system | |
446 | * gd_version: fdparm structure version | |
447 | * size: size in bytes of passed in nfsctl_fdparm | |
448 | * Output: | |
449 | * On success: passed-in buffer filled with nfsctl_res | |
450 | * (a fixed-length raw NFS file handle); | |
451 | * return code is the size in bytes of the file handle | |
452 | * On error: return code is negative errno value | |
453 | * | |
454 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
455 | * is the same size as a struct sockaddr_in. | |
456 | */ | |
1da177e4 LT |
457 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
458 | { | |
459 | struct nfsctl_fdparm *data; | |
460 | struct sockaddr_in *sin; | |
461 | struct auth_domain *clp; | |
462 | int err = 0; | |
463 | struct knfsd_fh fh; | |
464 | char *res; | |
f15364bd | 465 | struct in6_addr in6; |
1da177e4 LT |
466 | |
467 | if (size < sizeof(*data)) | |
468 | return -EINVAL; | |
469 | data = (struct nfsctl_fdparm*)buf; | |
470 | err = -EPROTONOSUPPORT; | |
471 | if (data->gd_addr.sa_family != AF_INET) | |
472 | goto out; | |
473 | err = -EINVAL; | |
474 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
475 | goto out; | |
476 | ||
477 | res = buf; | |
478 | sin = (struct sockaddr_in *)&data->gd_addr; | |
479 | exp_readlock(); | |
f15364bd AC |
480 | |
481 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
482 | ||
352114f3 | 483 | clp = auth_unix_lookup(&init_net, &in6); |
f15364bd | 484 | if (!clp) |
1da177e4 LT |
485 | err = -EPERM; |
486 | else { | |
487 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
488 | auth_domain_put(clp); | |
489 | } | |
490 | exp_readunlock(); | |
491 | ||
492 | if (err == 0) { | |
493 | memset(res,0, NFS_FHSIZE); | |
494 | memcpy(res, &fh.fh_base, fh.fh_size); | |
495 | err = NFS_FHSIZE; | |
496 | } | |
497 | out: | |
498 | return err; | |
499 | } | |
1e140567 | 500 | #endif /* CONFIG_NFSD_DEPRECATED */ |
1da177e4 | 501 | |
262a0982 CL |
502 | /** |
503 | * write_unlock_ip - Release all locks used by a client | |
504 | * | |
505 | * Experimental. | |
506 | * | |
507 | * Input: | |
508 | * buf: '\n'-terminated C string containing a | |
4116092b | 509 | * presentation format IP address |
262a0982 CL |
510 | * size: length of C string in @buf |
511 | * Output: | |
512 | * On success: returns zero if all specified locks were released; | |
513 | * returns one if one or more locks were not released | |
514 | * On error: return code is negative errno value | |
262a0982 | 515 | */ |
b046ccdc | 516 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 517 | { |
4116092b CL |
518 | struct sockaddr_storage address; |
519 | struct sockaddr *sap = (struct sockaddr *)&address; | |
520 | size_t salen = sizeof(address); | |
367c8c7b | 521 | char *fo_path; |
4373ea84 WC |
522 | |
523 | /* sanity check */ | |
524 | if (size == 0) | |
525 | return -EINVAL; | |
526 | ||
527 | if (buf[size-1] != '\n') | |
528 | return -EINVAL; | |
529 | ||
530 | fo_path = buf; | |
531 | if (qword_get(&buf, fo_path, size) < 0) | |
532 | return -EINVAL; | |
533 | ||
4116092b | 534 | if (rpc_pton(fo_path, size, sap, salen) == 0) |
4373ea84 | 535 | return -EINVAL; |
4373ea84 | 536 | |
4116092b | 537 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
538 | } |
539 | ||
262a0982 CL |
540 | /** |
541 | * write_unlock_fs - Release all locks on a local file system | |
542 | * | |
543 | * Experimental. | |
544 | * | |
545 | * Input: | |
546 | * buf: '\n'-terminated C string containing the | |
547 | * absolute pathname of a local file system | |
548 | * size: length of C string in @buf | |
549 | * Output: | |
550 | * On success: returns zero if all specified locks were released; | |
551 | * returns one if one or more locks were not released | |
552 | * On error: return code is negative errno value | |
553 | */ | |
b046ccdc | 554 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 555 | { |
a63bb996 | 556 | struct path path; |
17efa372 WC |
557 | char *fo_path; |
558 | int error; | |
559 | ||
560 | /* sanity check */ | |
561 | if (size == 0) | |
562 | return -EINVAL; | |
563 | ||
564 | if (buf[size-1] != '\n') | |
565 | return -EINVAL; | |
566 | ||
567 | fo_path = buf; | |
568 | if (qword_get(&buf, fo_path, size) < 0) | |
569 | return -EINVAL; | |
570 | ||
a63bb996 | 571 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
572 | if (error) |
573 | return error; | |
574 | ||
262a0982 CL |
575 | /* |
576 | * XXX: Needs better sanity checking. Otherwise we could end up | |
577 | * releasing locks on the wrong file system. | |
578 | * | |
579 | * For example: | |
580 | * 1. Does the path refer to a directory? | |
581 | * 2. Is that directory a mount point, or | |
582 | * 3. Is that directory the root of an exported file system? | |
583 | */ | |
a63bb996 | 584 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 585 | |
a63bb996 | 586 | path_put(&path); |
17efa372 WC |
587 | return error; |
588 | } | |
589 | ||
262a0982 CL |
590 | /** |
591 | * write_filehandle - Get a variable-length NFS file handle by path | |
592 | * | |
593 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
594 | * three alphanumeric words separated by whitespace. The string may | |
595 | * contain escape sequences. | |
596 | * | |
597 | * Input: | |
598 | * buf: | |
599 | * domain: client domain name | |
600 | * path: export pathname | |
601 | * maxsize: numeric maximum size of | |
602 | * @buf | |
603 | * size: length of C string in @buf | |
604 | * Output: | |
605 | * On success: passed-in buffer filled with '\n'-terminated C | |
606 | * string containing a ASCII hex text version | |
607 | * of the NFS file handle; | |
608 | * return code is the size in bytes of the string | |
609 | * On error: return code is negative errno value | |
610 | */ | |
1da177e4 LT |
611 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
612 | { | |
1da177e4 | 613 | char *dname, *path; |
246d95ba | 614 | int uninitialized_var(maxsize); |
1da177e4 LT |
615 | char *mesg = buf; |
616 | int len; | |
617 | struct auth_domain *dom; | |
618 | struct knfsd_fh fh; | |
619 | ||
87d26ea7 BF |
620 | if (size == 0) |
621 | return -EINVAL; | |
622 | ||
1da177e4 LT |
623 | if (buf[size-1] != '\n') |
624 | return -EINVAL; | |
625 | buf[size-1] = 0; | |
626 | ||
627 | dname = mesg; | |
628 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
629 | if (len <= 0) |
630 | return -EINVAL; | |
1da177e4 LT |
631 | |
632 | path = dname+len+1; | |
633 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
634 | if (len <= 0) |
635 | return -EINVAL; | |
1da177e4 LT |
636 | |
637 | len = get_int(&mesg, &maxsize); | |
638 | if (len) | |
639 | return len; | |
640 | ||
641 | if (maxsize < NFS_FHSIZE) | |
642 | return -EINVAL; | |
643 | if (maxsize > NFS3_FHSIZE) | |
644 | maxsize = NFS3_FHSIZE; | |
645 | ||
646 | if (qword_get(&mesg, mesg, size)>0) | |
647 | return -EINVAL; | |
648 | ||
649 | /* we have all the words, they are in buf.. */ | |
650 | dom = unix_domain_find(dname); | |
651 | if (!dom) | |
652 | return -ENOMEM; | |
653 | ||
654 | len = exp_rootfh(dom, path, &fh, maxsize); | |
655 | auth_domain_put(dom); | |
656 | if (len) | |
657 | return len; | |
658 | ||
54224f04 CL |
659 | mesg = buf; |
660 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
661 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
662 | mesg[-1] = '\n'; | |
663 | return mesg - buf; | |
664 | } | |
665 | ||
262a0982 CL |
666 | /** |
667 | * write_threads - Start NFSD, or report the current number of running threads | |
668 | * | |
669 | * Input: | |
670 | * buf: ignored | |
671 | * size: zero | |
672 | * Output: | |
673 | * On success: passed-in buffer filled with '\n'-terminated C | |
674 | * string numeric value representing the number of | |
675 | * running NFSD threads; | |
676 | * return code is the size in bytes of the string | |
677 | * On error: return code is zero | |
678 | * | |
679 | * OR | |
680 | * | |
681 | * Input: | |
682 | * buf: C string containing an unsigned | |
683 | * integer value representing the | |
684 | * number of NFSD threads to start | |
685 | * size: non-zero length of C string in @buf | |
686 | * Output: | |
687 | * On success: NFS service is started; | |
688 | * passed-in buffer filled with '\n'-terminated C | |
689 | * string numeric value representing the number of | |
690 | * running NFSD threads; | |
691 | * return code is the size in bytes of the string | |
692 | * On error: return code is zero or a negative errno value | |
693 | */ | |
1da177e4 LT |
694 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
695 | { | |
1da177e4 LT |
696 | char *mesg = buf; |
697 | int rv; | |
698 | if (size > 0) { | |
699 | int newthreads; | |
700 | rv = get_int(&mesg, &newthreads); | |
701 | if (rv) | |
702 | return rv; | |
9e074856 | 703 | if (newthreads < 0) |
1da177e4 | 704 | return -EINVAL; |
9e074856 | 705 | rv = nfsd_svc(NFS_PORT, newthreads); |
82e12fe9 | 706 | if (rv < 0) |
1da177e4 | 707 | return rv; |
82e12fe9 N |
708 | } else |
709 | rv = nfsd_nrthreads(); | |
e06b6405 | 710 | |
82e12fe9 | 711 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
712 | } |
713 | ||
262a0982 CL |
714 | /** |
715 | * write_pool_threads - Set or report the current number of threads per pool | |
716 | * | |
717 | * Input: | |
718 | * buf: ignored | |
719 | * size: zero | |
720 | * | |
721 | * OR | |
722 | * | |
723 | * Input: | |
724 | * buf: C string containing whitespace- | |
725 | * separated unsigned integer values | |
726 | * representing the number of NFSD | |
727 | * threads to start in each pool | |
728 | * size: non-zero length of C string in @buf | |
729 | * Output: | |
730 | * On success: passed-in buffer filled with '\n'-terminated C | |
731 | * string containing integer values representing the | |
732 | * number of NFSD threads in each pool; | |
733 | * return code is the size in bytes of the string | |
734 | * On error: return code is zero or a negative errno value | |
735 | */ | |
eed2965a GB |
736 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
737 | { | |
738 | /* if size > 0, look for an array of number of threads per node | |
739 | * and apply them then write out number of threads per node as reply | |
740 | */ | |
741 | char *mesg = buf; | |
742 | int i; | |
743 | int rv; | |
744 | int len; | |
bedbdd8b | 745 | int npools; |
eed2965a GB |
746 | int *nthreads; |
747 | ||
bedbdd8b NB |
748 | mutex_lock(&nfsd_mutex); |
749 | npools = nfsd_nrpools(); | |
eed2965a GB |
750 | if (npools == 0) { |
751 | /* | |
752 | * NFS is shut down. The admin can start it by | |
753 | * writing to the threads file but NOT the pool_threads | |
754 | * file, sorry. Report zero threads. | |
755 | */ | |
bedbdd8b | 756 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
757 | strcpy(buf, "0\n"); |
758 | return strlen(buf); | |
759 | } | |
760 | ||
761 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 762 | rv = -ENOMEM; |
eed2965a | 763 | if (nthreads == NULL) |
bedbdd8b | 764 | goto out_free; |
eed2965a GB |
765 | |
766 | if (size > 0) { | |
767 | for (i = 0; i < npools; i++) { | |
768 | rv = get_int(&mesg, &nthreads[i]); | |
769 | if (rv == -ENOENT) | |
770 | break; /* fewer numbers than pools */ | |
771 | if (rv) | |
772 | goto out_free; /* syntax error */ | |
773 | rv = -EINVAL; | |
774 | if (nthreads[i] < 0) | |
775 | goto out_free; | |
776 | } | |
777 | rv = nfsd_set_nrthreads(i, nthreads); | |
778 | if (rv) | |
779 | goto out_free; | |
780 | } | |
781 | ||
782 | rv = nfsd_get_nrthreads(npools, nthreads); | |
783 | if (rv) | |
784 | goto out_free; | |
785 | ||
786 | mesg = buf; | |
787 | size = SIMPLE_TRANSACTION_LIMIT; | |
788 | for (i = 0; i < npools && size > 0; i++) { | |
789 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
790 | len = strlen(mesg); | |
791 | size -= len; | |
792 | mesg += len; | |
793 | } | |
413d63d7 | 794 | rv = mesg - buf; |
eed2965a GB |
795 | out_free: |
796 | kfree(nthreads); | |
bedbdd8b | 797 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
798 | return rv; |
799 | } | |
800 | ||
3dd98a3b | 801 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 802 | { |
70c3b76c | 803 | char *mesg = buf; |
8daf220a | 804 | char *vers, *minorp, sign; |
261758b5 | 805 | int len, num, remaining; |
8daf220a | 806 | unsigned minor; |
70c3b76c N |
807 | ssize_t tlen = 0; |
808 | char *sep; | |
809 | ||
810 | if (size>0) { | |
811 | if (nfsd_serv) | |
6658d3a7 N |
812 | /* Cannot change versions without updating |
813 | * nfsd_serv->sv_xdrsize, and reallocing | |
814 | * rq_argp and rq_resp | |
815 | */ | |
70c3b76c N |
816 | return -EBUSY; |
817 | if (buf[size-1] != '\n') | |
818 | return -EINVAL; | |
819 | buf[size-1] = 0; | |
820 | ||
821 | vers = mesg; | |
822 | len = qword_get(&mesg, vers, size); | |
823 | if (len <= 0) return -EINVAL; | |
824 | do { | |
825 | sign = *vers; | |
826 | if (sign == '+' || sign == '-') | |
8daf220a | 827 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 828 | else |
8daf220a BH |
829 | num = simple_strtol(vers, &minorp, 0); |
830 | if (*minorp == '.') { | |
831 | if (num < 4) | |
832 | return -EINVAL; | |
833 | minor = simple_strtoul(minorp+1, NULL, 0); | |
834 | if (minor == 0) | |
835 | return -EINVAL; | |
836 | if (nfsd_minorversion(minor, sign == '-' ? | |
837 | NFSD_CLEAR : NFSD_SET) < 0) | |
838 | return -EINVAL; | |
839 | goto next; | |
840 | } | |
70c3b76c N |
841 | switch(num) { |
842 | case 2: | |
843 | case 3: | |
844 | case 4: | |
6658d3a7 | 845 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
846 | break; |
847 | default: | |
848 | return -EINVAL; | |
849 | } | |
8daf220a | 850 | next: |
70c3b76c | 851 | vers += len + 1; |
70c3b76c N |
852 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
853 | /* If all get turned off, turn them back on, as | |
854 | * having no versions is BAD | |
855 | */ | |
6658d3a7 | 856 | nfsd_reset_versions(); |
70c3b76c | 857 | } |
261758b5 | 858 | |
70c3b76c N |
859 | /* Now write current state into reply buffer */ |
860 | len = 0; | |
861 | sep = ""; | |
261758b5 | 862 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 863 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 864 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 865 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 866 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
867 | num); |
868 | sep = " "; | |
261758b5 CL |
869 | |
870 | if (len > remaining) | |
871 | break; | |
872 | remaining -= len; | |
873 | buf += len; | |
874 | tlen += len; | |
70c3b76c | 875 | } |
8daf220a | 876 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
877 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
878 | minor++) { | |
879 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
880 | (nfsd_vers(4, NFSD_TEST) && |
881 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
882 | '+' : '-', | |
883 | minor); | |
261758b5 CL |
884 | |
885 | if (len > remaining) | |
886 | break; | |
887 | remaining -= len; | |
888 | buf += len; | |
889 | tlen += len; | |
890 | } | |
891 | ||
892 | len = snprintf(buf, remaining, "\n"); | |
893 | if (len > remaining) | |
894 | return -EINVAL; | |
895 | return tlen + len; | |
70c3b76c N |
896 | } |
897 | ||
262a0982 CL |
898 | /** |
899 | * write_versions - Set or report the available NFS protocol versions | |
900 | * | |
901 | * Input: | |
902 | * buf: ignored | |
903 | * size: zero | |
904 | * Output: | |
905 | * On success: passed-in buffer filled with '\n'-terminated C | |
906 | * string containing positive or negative integer | |
907 | * values representing the current status of each | |
908 | * protocol version; | |
909 | * return code is the size in bytes of the string | |
910 | * On error: return code is zero or a negative errno value | |
911 | * | |
912 | * OR | |
913 | * | |
914 | * Input: | |
915 | * buf: C string containing whitespace- | |
916 | * separated positive or negative | |
917 | * integer values representing NFS | |
918 | * protocol versions to enable ("+n") | |
919 | * or disable ("-n") | |
920 | * size: non-zero length of C string in @buf | |
921 | * Output: | |
922 | * On success: status of zero or more protocol versions has | |
923 | * been updated; passed-in buffer filled with | |
924 | * '\n'-terminated C string containing positive | |
925 | * or negative integer values representing the | |
926 | * current status of each protocol version; | |
927 | * return code is the size in bytes of the string | |
928 | * On error: return code is zero or a negative errno value | |
929 | */ | |
3dd98a3b JL |
930 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
931 | { | |
932 | ssize_t rv; | |
933 | ||
934 | mutex_lock(&nfsd_mutex); | |
935 | rv = __write_versions(file, buf, size); | |
936 | mutex_unlock(&nfsd_mutex); | |
937 | return rv; | |
938 | } | |
939 | ||
0a5372d8 CL |
940 | /* |
941 | * Zero-length write. Return a list of NFSD's current listener | |
942 | * transports. | |
943 | */ | |
944 | static ssize_t __write_ports_names(char *buf) | |
945 | { | |
946 | if (nfsd_serv == NULL) | |
947 | return 0; | |
335c54bd | 948 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
949 | } |
950 | ||
0b7c2f6f CL |
951 | /* |
952 | * A single 'fd' number was written, in which case it must be for | |
953 | * a socket of a supported family/protocol, and we use it as an | |
954 | * nfsd listener. | |
955 | */ | |
956 | static ssize_t __write_ports_addfd(char *buf) | |
957 | { | |
958 | char *mesg = buf; | |
959 | int fd, err; | |
960 | ||
961 | err = get_int(&mesg, &fd); | |
962 | if (err != 0 || fd < 0) | |
963 | return -EINVAL; | |
964 | ||
965 | err = nfsd_create_serv(); | |
966 | if (err != 0) | |
967 | return err; | |
968 | ||
bfba9ab4 | 969 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
78a8d7c8 | 970 | if (err < 0) { |
78a8d7c8 JL |
971 | svc_destroy(nfsd_serv); |
972 | return err; | |
973 | } | |
0b7c2f6f | 974 | |
ea068bad CL |
975 | /* Decrease the count, but don't shut down the service */ |
976 | nfsd_serv->sv_nrthreads--; | |
977 | return err; | |
0b7c2f6f CL |
978 | } |
979 | ||
82d56591 CL |
980 | /* |
981 | * A '-' followed by the 'name' of a socket means we close the socket. | |
982 | */ | |
983 | static ssize_t __write_ports_delfd(char *buf) | |
984 | { | |
985 | char *toclose; | |
986 | int len = 0; | |
987 | ||
988 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
989 | if (toclose == NULL) | |
990 | return -ENOMEM; | |
991 | ||
992 | if (nfsd_serv != NULL) | |
8435d34d CL |
993 | len = svc_sock_names(nfsd_serv, buf, |
994 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
82d56591 CL |
995 | kfree(toclose); |
996 | return len; | |
997 | } | |
998 | ||
4eb68c26 CL |
999 | /* |
1000 | * A transport listener is added by writing it's transport name and | |
1001 | * a port number. | |
1002 | */ | |
1003 | static ssize_t __write_ports_addxprt(char *buf) | |
1004 | { | |
1005 | char transport[16]; | |
37498292 | 1006 | struct svc_xprt *xprt; |
4eb68c26 CL |
1007 | int port, err; |
1008 | ||
1009 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
1010 | return -EINVAL; | |
1011 | ||
4be929be | 1012 | if (port < 1 || port > USHRT_MAX) |
4eb68c26 CL |
1013 | return -EINVAL; |
1014 | ||
1015 | err = nfsd_create_serv(); | |
1016 | if (err != 0) | |
1017 | return err; | |
1018 | ||
fc5d00b0 | 1019 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
4eb68c26 | 1020 | PF_INET, port, SVC_SOCK_ANONYMOUS); |
68717908 | 1021 | if (err < 0) |
37498292 CL |
1022 | goto out_err; |
1023 | ||
fc5d00b0 | 1024 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
37498292 CL |
1025 | PF_INET6, port, SVC_SOCK_ANONYMOUS); |
1026 | if (err < 0 && err != -EAFNOSUPPORT) | |
1027 | goto out_close; | |
0cd14a06 JL |
1028 | |
1029 | /* Decrease the count, but don't shut down the service */ | |
1030 | nfsd_serv->sv_nrthreads--; | |
4eb68c26 | 1031 | return 0; |
37498292 CL |
1032 | out_close: |
1033 | xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); | |
1034 | if (xprt != NULL) { | |
1035 | svc_close_xprt(xprt); | |
1036 | svc_xprt_put(xprt); | |
1037 | } | |
1038 | out_err: | |
0cd14a06 | 1039 | svc_destroy(nfsd_serv); |
37498292 | 1040 | return err; |
4eb68c26 CL |
1041 | } |
1042 | ||
4cd5dc75 CL |
1043 | /* |
1044 | * A transport listener is removed by writing a "-", it's transport | |
1045 | * name, and it's port number. | |
1046 | */ | |
1047 | static ssize_t __write_ports_delxprt(char *buf) | |
1048 | { | |
1049 | struct svc_xprt *xprt; | |
1050 | char transport[16]; | |
1051 | int port; | |
1052 | ||
1053 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
1054 | return -EINVAL; | |
1055 | ||
4be929be | 1056 | if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) |
4cd5dc75 CL |
1057 | return -EINVAL; |
1058 | ||
1059 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
1060 | if (xprt == NULL) | |
1061 | return -ENOTCONN; | |
1062 | ||
1063 | svc_close_xprt(xprt); | |
1064 | svc_xprt_put(xprt); | |
1065 | return 0; | |
1066 | } | |
1067 | ||
bedbdd8b | 1068 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 1069 | { |
0a5372d8 CL |
1070 | if (size == 0) |
1071 | return __write_ports_names(buf); | |
0b7c2f6f CL |
1072 | |
1073 | if (isdigit(buf[0])) | |
1074 | return __write_ports_addfd(buf); | |
82d56591 CL |
1075 | |
1076 | if (buf[0] == '-' && isdigit(buf[1])) | |
1077 | return __write_ports_delfd(buf); | |
4eb68c26 CL |
1078 | |
1079 | if (isalpha(buf[0])) | |
1080 | return __write_ports_addxprt(buf); | |
4cd5dc75 CL |
1081 | |
1082 | if (buf[0] == '-' && isalpha(buf[1])) | |
1083 | return __write_ports_delxprt(buf); | |
1084 | ||
b41b66d6 | 1085 | return -EINVAL; |
80212d59 N |
1086 | } |
1087 | ||
262a0982 CL |
1088 | /** |
1089 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
1090 | * | |
1091 | * Input: | |
1092 | * buf: ignored | |
1093 | * size: zero | |
1094 | * Output: | |
1095 | * On success: passed-in buffer filled with a '\n'-terminated C | |
1096 | * string containing a whitespace-separated list of | |
1097 | * named NFSD listeners; | |
1098 | * return code is the size in bytes of the string | |
1099 | * On error: return code is zero or a negative errno value | |
1100 | * | |
1101 | * OR | |
1102 | * | |
1103 | * Input: | |
1104 | * buf: C string containing an unsigned | |
1105 | * integer value representing a bound | |
1106 | * but unconnected socket that is to be | |
c71206a7 CL |
1107 | * used as an NFSD listener; listen(3) |
1108 | * must be called for a SOCK_STREAM | |
1109 | * socket, otherwise it is ignored | |
262a0982 CL |
1110 | * size: non-zero length of C string in @buf |
1111 | * Output: | |
1112 | * On success: NFS service is started; | |
1113 | * passed-in buffer filled with a '\n'-terminated C | |
1114 | * string containing a unique alphanumeric name of | |
1115 | * the listener; | |
1116 | * return code is the size in bytes of the string | |
1117 | * On error: return code is a negative errno value | |
1118 | * | |
1119 | * OR | |
1120 | * | |
1121 | * Input: | |
1122 | * buf: C string containing a "-" followed | |
1123 | * by an integer value representing a | |
1124 | * previously passed in socket file | |
1125 | * descriptor | |
1126 | * size: non-zero length of C string in @buf | |
1127 | * Output: | |
1128 | * On success: NFS service no longer listens on that socket; | |
1129 | * passed-in buffer filled with a '\n'-terminated C | |
1130 | * string containing a unique name of the listener; | |
1131 | * return code is the size in bytes of the string | |
1132 | * On error: return code is a negative errno value | |
1133 | * | |
1134 | * OR | |
1135 | * | |
1136 | * Input: | |
1137 | * buf: C string containing a transport | |
1138 | * name and an unsigned integer value | |
1139 | * representing the port to listen on, | |
1140 | * separated by whitespace | |
1141 | * size: non-zero length of C string in @buf | |
1142 | * Output: | |
1143 | * On success: returns zero; NFS service is started | |
1144 | * On error: return code is a negative errno value | |
1145 | * | |
1146 | * OR | |
1147 | * | |
1148 | * Input: | |
1149 | * buf: C string containing a "-" followed | |
1150 | * by a transport name and an unsigned | |
1151 | * integer value representing the port | |
1152 | * to listen on, separated by whitespace | |
1153 | * size: non-zero length of C string in @buf | |
1154 | * Output: | |
1155 | * On success: returns zero; NFS service no longer listens | |
1156 | * on that transport | |
1157 | * On error: return code is a negative errno value | |
1158 | */ | |
bedbdd8b NB |
1159 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
1160 | { | |
1161 | ssize_t rv; | |
3dd98a3b | 1162 | |
bedbdd8b NB |
1163 | mutex_lock(&nfsd_mutex); |
1164 | rv = __write_ports(file, buf, size); | |
1165 | mutex_unlock(&nfsd_mutex); | |
1166 | return rv; | |
1167 | } | |
1168 | ||
1169 | ||
596bbe53 N |
1170 | int nfsd_max_blksize; |
1171 | ||
262a0982 CL |
1172 | /** |
1173 | * write_maxblksize - Set or report the current NFS blksize | |
1174 | * | |
1175 | * Input: | |
1176 | * buf: ignored | |
1177 | * size: zero | |
1178 | * | |
1179 | * OR | |
1180 | * | |
1181 | * Input: | |
1182 | * buf: C string containing an unsigned | |
1183 | * integer value representing the new | |
1184 | * NFS blksize | |
1185 | * size: non-zero length of C string in @buf | |
1186 | * Output: | |
1187 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1188 | * containing numeric value of the current NFS blksize | |
1189 | * setting; | |
1190 | * return code is the size in bytes of the string | |
1191 | * On error: return code is zero or a negative errno value | |
1192 | */ | |
596bbe53 N |
1193 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
1194 | { | |
1195 | char *mesg = buf; | |
1196 | if (size > 0) { | |
1197 | int bsize; | |
1198 | int rv = get_int(&mesg, &bsize); | |
1199 | if (rv) | |
1200 | return rv; | |
1201 | /* force bsize into allowed range and | |
1202 | * required alignment. | |
1203 | */ | |
1204 | if (bsize < 1024) | |
1205 | bsize = 1024; | |
1206 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1207 | bsize = NFSSVC_MAXBLKSIZE; | |
1208 | bsize &= ~(1024-1); | |
bedbdd8b | 1209 | mutex_lock(&nfsd_mutex); |
7fa53cc8 | 1210 | if (nfsd_serv) { |
bedbdd8b | 1211 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1212 | return -EBUSY; |
1213 | } | |
1214 | nfsd_max_blksize = bsize; | |
bedbdd8b | 1215 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 1216 | } |
e06b6405 CL |
1217 | |
1218 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
1219 | nfsd_max_blksize); | |
596bbe53 N |
1220 | } |
1221 | ||
70c3b76c | 1222 | #ifdef CONFIG_NFSD_V4 |
f0135740 | 1223 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) |
1da177e4 | 1224 | { |
1da177e4 | 1225 | char *mesg = buf; |
f0135740 | 1226 | int rv, i; |
1da177e4 LT |
1227 | |
1228 | if (size > 0) { | |
3dd98a3b JL |
1229 | if (nfsd_serv) |
1230 | return -EBUSY; | |
f0135740 | 1231 | rv = get_int(&mesg, &i); |
1da177e4 LT |
1232 | if (rv) |
1233 | return rv; | |
e7b184f1 BF |
1234 | /* |
1235 | * Some sanity checking. We don't have a reason for | |
1236 | * these particular numbers, but problems with the | |
1237 | * extremes are: | |
1238 | * - Too short: the briefest network outage may | |
1239 | * cause clients to lose all their locks. Also, | |
1240 | * the frequent polling may be wasteful. | |
1241 | * - Too long: do you really want reboot recovery | |
1242 | * to take more than an hour? Or to make other | |
1243 | * clients wait an hour before being able to | |
1244 | * revoke a dead client's locks? | |
1245 | */ | |
f0135740 | 1246 | if (i < 10 || i > 3600) |
1da177e4 | 1247 | return -EINVAL; |
f0135740 | 1248 | *time = i; |
1da177e4 | 1249 | } |
e06b6405 | 1250 | |
f0135740 BF |
1251 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); |
1252 | } | |
1253 | ||
1254 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) | |
1255 | { | |
1256 | ssize_t rv; | |
1257 | ||
1258 | mutex_lock(&nfsd_mutex); | |
1259 | rv = __nfsd4_write_time(file, buf, size, time); | |
1260 | mutex_unlock(&nfsd_mutex); | |
1261 | return rv; | |
1da177e4 LT |
1262 | } |
1263 | ||
262a0982 CL |
1264 | /** |
1265 | * write_leasetime - Set or report the current NFSv4 lease time | |
1266 | * | |
1267 | * Input: | |
1268 | * buf: ignored | |
1269 | * size: zero | |
1270 | * | |
1271 | * OR | |
1272 | * | |
1273 | * Input: | |
1274 | * buf: C string containing an unsigned | |
1275 | * integer value representing the new | |
1276 | * NFSv4 lease expiry time | |
1277 | * size: non-zero length of C string in @buf | |
1278 | * Output: | |
1279 | * On success: passed-in buffer filled with '\n'-terminated C | |
1280 | * string containing unsigned integer value of the | |
1281 | * current lease expiry time; | |
1282 | * return code is the size in bytes of the string | |
1283 | * On error: return code is zero or a negative errno value | |
1284 | */ | |
3dd98a3b JL |
1285 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1286 | { | |
f0135740 | 1287 | return nfsd4_write_time(file, buf, size, &nfsd4_lease); |
3dd98a3b JL |
1288 | } |
1289 | ||
efc4bb4f BF |
1290 | /** |
1291 | * write_gracetime - Set or report current NFSv4 grace period time | |
1292 | * | |
1293 | * As above, but sets the time of the NFSv4 grace period. | |
1294 | * | |
1295 | * Note this should never be set to less than the *previous* | |
1296 | * lease-period time, but we don't try to enforce this. (In the common | |
1297 | * case (a new boot), we don't know what the previous lease time was | |
1298 | * anyway.) | |
1299 | */ | |
1300 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1301 | { | |
1302 | return nfsd4_write_time(file, buf, size, &nfsd4_grace); | |
1303 | } | |
1304 | ||
3dd98a3b JL |
1305 | extern char *nfs4_recoverydir(void); |
1306 | ||
1307 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
1308 | { |
1309 | char *mesg = buf; | |
1310 | char *recdir; | |
1311 | int len, status; | |
1312 | ||
3dd98a3b JL |
1313 | if (size > 0) { |
1314 | if (nfsd_serv) | |
1315 | return -EBUSY; | |
1316 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1317 | return -EINVAL; | |
1318 | buf[size-1] = 0; | |
0964a3d3 | 1319 | |
3dd98a3b JL |
1320 | recdir = mesg; |
1321 | len = qword_get(&mesg, recdir, size); | |
1322 | if (len <= 0) | |
1323 | return -EINVAL; | |
0964a3d3 | 1324 | |
3dd98a3b | 1325 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1326 | if (status) |
1327 | return status; | |
3dd98a3b | 1328 | } |
3d72ab8f CL |
1329 | |
1330 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1331 | nfs4_recoverydir()); | |
0964a3d3 | 1332 | } |
3dd98a3b | 1333 | |
262a0982 CL |
1334 | /** |
1335 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1336 | * | |
1337 | * Input: | |
1338 | * buf: ignored | |
1339 | * size: zero | |
1340 | * | |
1341 | * OR | |
1342 | * | |
1343 | * Input: | |
1344 | * buf: C string containing the pathname | |
1345 | * of the directory on a local file | |
1346 | * system containing permanent NFSv4 | |
1347 | * recovery data | |
1348 | * size: non-zero length of C string in @buf | |
1349 | * Output: | |
1350 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1351 | * containing the current recovery pathname setting; | |
1352 | * return code is the size in bytes of the string | |
1353 | * On error: return code is zero or a negative errno value | |
1354 | */ | |
3dd98a3b JL |
1355 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1356 | { | |
1357 | ssize_t rv; | |
1358 | ||
1359 | mutex_lock(&nfsd_mutex); | |
1360 | rv = __write_recoverydir(file, buf, size); | |
1361 | mutex_unlock(&nfsd_mutex); | |
1362 | return rv; | |
1363 | } | |
1364 | ||
70c3b76c | 1365 | #endif |
0964a3d3 | 1366 | |
1da177e4 LT |
1367 | /*----------------------------------------------------------------------------*/ |
1368 | /* | |
1369 | * populating the filesystem. | |
1370 | */ | |
1371 | ||
1372 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1373 | { | |
1374 | static struct tree_descr nfsd_files[] = { | |
1e140567 | 1375 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
1376 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, |
1377 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1378 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1379 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1380 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1381 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1382 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1e140567 | 1383 | #endif |
1da177e4 | 1384 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, |
e8e8753f BF |
1385 | [NFSD_Export_features] = {"export_features", |
1386 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1387 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1388 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1389 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1390 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1391 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1392 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1393 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1394 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
70c3b76c | 1395 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1396 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1397 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1398 | #ifdef CONFIG_NFSD_V4 |
1399 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1400 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1401 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1402 | #endif |
1403 | /* last one */ {""} | |
1404 | }; | |
1405 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1406 | } | |
1407 | ||
fc14f2fe AV |
1408 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, |
1409 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1410 | { |
fc14f2fe | 1411 | return mount_single(fs_type, flags, data, nfsd_fill_super); |
1da177e4 LT |
1412 | } |
1413 | ||
1414 | static struct file_system_type nfsd_fs_type = { | |
1415 | .owner = THIS_MODULE, | |
1416 | .name = "nfsd", | |
fc14f2fe | 1417 | .mount = nfsd_mount, |
1da177e4 LT |
1418 | .kill_sb = kill_litter_super, |
1419 | }; | |
1420 | ||
e331f606 BF |
1421 | #ifdef CONFIG_PROC_FS |
1422 | static int create_proc_exports_entry(void) | |
1423 | { | |
1424 | struct proc_dir_entry *entry; | |
1425 | ||
1426 | entry = proc_mkdir("fs/nfs", NULL); | |
1427 | if (!entry) | |
1428 | return -ENOMEM; | |
9ef2db26 | 1429 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1430 | if (!entry) |
1431 | return -ENOMEM; | |
e331f606 BF |
1432 | return 0; |
1433 | } | |
1434 | #else /* CONFIG_PROC_FS */ | |
1435 | static int create_proc_exports_entry(void) | |
1436 | { | |
1437 | return 0; | |
1438 | } | |
1439 | #endif | |
1440 | ||
1da177e4 LT |
1441 | static int __init init_nfsd(void) |
1442 | { | |
1443 | int retval; | |
1444 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1445 | ||
e8ff2a84 BF |
1446 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1447 | if (retval) | |
1448 | return retval; | |
1da177e4 | 1449 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1450 | retval = nfsd_reply_cache_init(); |
1451 | if (retval) | |
1452 | goto out_free_stat; | |
dbf847ec BF |
1453 | retval = nfsd_export_init(); |
1454 | if (retval) | |
1455 | goto out_free_cache; | |
1da177e4 | 1456 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1457 | retval = nfsd_idmap_init(); |
1458 | if (retval) | |
1459 | goto out_free_lockd; | |
e331f606 BF |
1460 | retval = create_proc_exports_entry(); |
1461 | if (retval) | |
1462 | goto out_free_idmap; | |
1da177e4 | 1463 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1464 | if (retval) |
1465 | goto out_free_all; | |
1466 | return 0; | |
1467 | out_free_all: | |
26808d3f BF |
1468 | remove_proc_entry("fs/nfs/exports", NULL); |
1469 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1470 | out_free_idmap: |
dbf847ec BF |
1471 | nfsd_idmap_shutdown(); |
1472 | out_free_lockd: | |
26808d3f | 1473 | nfsd_lockd_shutdown(); |
e331f606 | 1474 | nfsd_export_shutdown(); |
dbf847ec | 1475 | out_free_cache: |
e331f606 | 1476 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1477 | out_free_stat: |
1478 | nfsd_stat_shutdown(); | |
26808d3f | 1479 | nfsd4_free_slabs(); |
1da177e4 LT |
1480 | return retval; |
1481 | } | |
1482 | ||
1483 | static void __exit exit_nfsd(void) | |
1484 | { | |
1485 | nfsd_export_shutdown(); | |
d5c3428b | 1486 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1487 | remove_proc_entry("fs/nfs/exports", NULL); |
1488 | remove_proc_entry("fs/nfs", NULL); | |
1489 | nfsd_stat_shutdown(); | |
1490 | nfsd_lockd_shutdown(); | |
1da177e4 | 1491 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1492 | nfsd4_free_slabs(); |
1da177e4 LT |
1493 | unregister_filesystem(&nfsd_fs_type); |
1494 | } | |
1495 | ||
1496 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1497 | MODULE_LICENSE("GPL"); | |
1498 | module_init(init_nfsd) | |
1499 | module_exit(exit_nfsd) |