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 | |
80212d59 | 11 | #include <linux/sunrpc/svcsock.h> |
1da177e4 | 12 | #include <linux/nfsd/syscall.h> |
4373ea84 | 13 | #include <linux/lockd/lockd.h> |
4116092b | 14 | #include <linux/sunrpc/clnt.h> |
b0b0c0a2 | 15 | #include <linux/sunrpc/gss_api.h> |
b084f598 | 16 | #include <linux/sunrpc/gss_krb5_enctypes.h> |
1da177e4 | 17 | |
2ca72e17 | 18 | #include "idmap.h" |
9a74af21 BH |
19 | #include "nfsd.h" |
20 | #include "cache.h" | |
21 | ||
1da177e4 | 22 | /* |
b0b0c0a2 | 23 | * We have a single directory with several nodes in it. |
1da177e4 LT |
24 | */ |
25 | enum { | |
26 | NFSD_Root = 1, | |
1da177e4 | 27 | NFSD_List, |
e8e8753f | 28 | NFSD_Export_features, |
1da177e4 | 29 | NFSD_Fh, |
4373ea84 | 30 | NFSD_FO_UnlockIP, |
17efa372 | 31 | NFSD_FO_UnlockFS, |
1da177e4 | 32 | NFSD_Threads, |
eed2965a | 33 | NFSD_Pool_Threads, |
03cf6c9f | 34 | NFSD_Pool_Stats, |
70c3b76c | 35 | NFSD_Versions, |
80212d59 | 36 | NFSD_Ports, |
596bbe53 | 37 | NFSD_MaxBlkSize, |
b0b0c0a2 | 38 | NFSD_SupportedEnctypes, |
70c3b76c N |
39 | /* |
40 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
41 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
42 | */ | |
43 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 44 | NFSD_Leasetime, |
efc4bb4f | 45 | NFSD_Gracetime, |
0964a3d3 | 46 | NFSD_RecoveryDir, |
70c3b76c | 47 | #endif |
1da177e4 LT |
48 | }; |
49 | ||
50 | /* | |
51 | * write() for these nodes. | |
52 | */ | |
1da177e4 | 53 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
54 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
55 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 56 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 57 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 58 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 59 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 60 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 61 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 62 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 63 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 64 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 65 | #endif |
1da177e4 LT |
66 | |
67 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
1da177e4 | 68 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
69 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
70 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 71 | [NFSD_Threads] = write_threads, |
eed2965a | 72 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 73 | [NFSD_Versions] = write_versions, |
80212d59 | 74 | [NFSD_Ports] = write_ports, |
596bbe53 | 75 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 76 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 77 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 78 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 79 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 80 | #endif |
1da177e4 LT |
81 | }; |
82 | ||
83 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
84 | { | |
7eaa36e2 | 85 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
86 | char *data; |
87 | ssize_t rv; | |
88 | ||
e8c96f8c | 89 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
90 | return -EINVAL; |
91 | ||
92 | data = simple_transaction_get(file, buf, size); | |
93 | if (IS_ERR(data)) | |
94 | return PTR_ERR(data); | |
95 | ||
96 | rv = write_op[ino](file, data, size); | |
8971a101 | 97 | if (rv >= 0) { |
1da177e4 LT |
98 | simple_transaction_set(file, rv); |
99 | rv = size; | |
100 | } | |
101 | return rv; | |
102 | } | |
103 | ||
7390022d N |
104 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
105 | { | |
106 | if (! file->private_data) { | |
107 | /* An attempt to read a transaction file without writing | |
108 | * causes a 0-byte write so that the file can return | |
109 | * state information | |
110 | */ | |
111 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
112 | if (rv < 0) | |
113 | return rv; | |
114 | } | |
115 | return simple_transaction_read(file, buf, size, pos); | |
116 | } | |
117 | ||
4b6f5d20 | 118 | static const struct file_operations transaction_ops = { |
1da177e4 | 119 | .write = nfsctl_transaction_write, |
7390022d | 120 | .read = nfsctl_transaction_read, |
1da177e4 | 121 | .release = simple_transaction_release, |
6038f373 | 122 | .llseek = default_llseek, |
1da177e4 LT |
123 | }; |
124 | ||
1da177e4 LT |
125 | static int exports_open(struct inode *inode, struct file *file) |
126 | { | |
127 | return seq_open(file, &nfs_exports_op); | |
128 | } | |
129 | ||
4b6f5d20 | 130 | static const struct file_operations exports_operations = { |
1da177e4 LT |
131 | .open = exports_open, |
132 | .read = seq_read, | |
133 | .llseek = seq_lseek, | |
134 | .release = seq_release, | |
9ef2db26 | 135 | .owner = THIS_MODULE, |
1da177e4 LT |
136 | }; |
137 | ||
e8e8753f BF |
138 | static int export_features_show(struct seq_file *m, void *v) |
139 | { | |
140 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
141 | return 0; | |
142 | } | |
143 | ||
144 | static int export_features_open(struct inode *inode, struct file *file) | |
145 | { | |
146 | return single_open(file, export_features_show, NULL); | |
147 | } | |
148 | ||
149 | static struct file_operations export_features_operations = { | |
150 | .open = export_features_open, | |
151 | .read = seq_read, | |
152 | .llseek = seq_lseek, | |
153 | .release = single_release, | |
154 | }; | |
155 | ||
b084f598 | 156 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 KC |
157 | static int supported_enctypes_show(struct seq_file *m, void *v) |
158 | { | |
b084f598 | 159 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); |
b0b0c0a2 KC |
160 | return 0; |
161 | } | |
162 | ||
163 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
164 | { | |
165 | return single_open(file, supported_enctypes_show, NULL); | |
166 | } | |
167 | ||
168 | static struct file_operations supported_enctypes_ops = { | |
169 | .open = supported_enctypes_open, | |
170 | .read = seq_read, | |
171 | .llseek = seq_lseek, | |
172 | .release = single_release, | |
173 | }; | |
b084f598 | 174 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
b0b0c0a2 | 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 | 178 | |
828c0950 | 179 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
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 | ||
1da177e4 | 192 | |
262a0982 CL |
193 | /** |
194 | * write_unlock_ip - Release all locks used by a client | |
195 | * | |
196 | * Experimental. | |
197 | * | |
198 | * Input: | |
199 | * buf: '\n'-terminated C string containing a | |
4116092b | 200 | * presentation format IP address |
262a0982 CL |
201 | * size: length of C string in @buf |
202 | * Output: | |
203 | * On success: returns zero if all specified locks were released; | |
204 | * returns one if one or more locks were not released | |
205 | * On error: return code is negative errno value | |
262a0982 | 206 | */ |
b046ccdc | 207 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 208 | { |
4116092b CL |
209 | struct sockaddr_storage address; |
210 | struct sockaddr *sap = (struct sockaddr *)&address; | |
211 | size_t salen = sizeof(address); | |
367c8c7b | 212 | char *fo_path; |
4373ea84 WC |
213 | |
214 | /* sanity check */ | |
215 | if (size == 0) | |
216 | return -EINVAL; | |
217 | ||
218 | if (buf[size-1] != '\n') | |
219 | return -EINVAL; | |
220 | ||
221 | fo_path = buf; | |
222 | if (qword_get(&buf, fo_path, size) < 0) | |
223 | return -EINVAL; | |
224 | ||
4116092b | 225 | if (rpc_pton(fo_path, size, sap, salen) == 0) |
4373ea84 | 226 | return -EINVAL; |
4373ea84 | 227 | |
4116092b | 228 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
229 | } |
230 | ||
262a0982 CL |
231 | /** |
232 | * write_unlock_fs - Release all locks on a local file system | |
233 | * | |
234 | * Experimental. | |
235 | * | |
236 | * Input: | |
237 | * buf: '\n'-terminated C string containing the | |
238 | * absolute pathname of a local file system | |
239 | * size: length of C string in @buf | |
240 | * Output: | |
241 | * On success: returns zero if all specified locks were released; | |
242 | * returns one if one or more locks were not released | |
243 | * On error: return code is negative errno value | |
244 | */ | |
b046ccdc | 245 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 246 | { |
a63bb996 | 247 | struct path path; |
17efa372 WC |
248 | char *fo_path; |
249 | int error; | |
250 | ||
251 | /* sanity check */ | |
252 | if (size == 0) | |
253 | return -EINVAL; | |
254 | ||
255 | if (buf[size-1] != '\n') | |
256 | return -EINVAL; | |
257 | ||
258 | fo_path = buf; | |
259 | if (qword_get(&buf, fo_path, size) < 0) | |
260 | return -EINVAL; | |
261 | ||
a63bb996 | 262 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
263 | if (error) |
264 | return error; | |
265 | ||
262a0982 CL |
266 | /* |
267 | * XXX: Needs better sanity checking. Otherwise we could end up | |
268 | * releasing locks on the wrong file system. | |
269 | * | |
270 | * For example: | |
271 | * 1. Does the path refer to a directory? | |
272 | * 2. Is that directory a mount point, or | |
273 | * 3. Is that directory the root of an exported file system? | |
274 | */ | |
a63bb996 | 275 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 276 | |
a63bb996 | 277 | path_put(&path); |
17efa372 WC |
278 | return error; |
279 | } | |
280 | ||
262a0982 CL |
281 | /** |
282 | * write_filehandle - Get a variable-length NFS file handle by path | |
283 | * | |
284 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
285 | * three alphanumeric words separated by whitespace. The string may | |
286 | * contain escape sequences. | |
287 | * | |
288 | * Input: | |
289 | * buf: | |
290 | * domain: client domain name | |
291 | * path: export pathname | |
292 | * maxsize: numeric maximum size of | |
293 | * @buf | |
294 | * size: length of C string in @buf | |
295 | * Output: | |
296 | * On success: passed-in buffer filled with '\n'-terminated C | |
297 | * string containing a ASCII hex text version | |
298 | * of the NFS file handle; | |
299 | * return code is the size in bytes of the string | |
300 | * On error: return code is negative errno value | |
301 | */ | |
1da177e4 LT |
302 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
303 | { | |
1da177e4 | 304 | char *dname, *path; |
246d95ba | 305 | int uninitialized_var(maxsize); |
1da177e4 LT |
306 | char *mesg = buf; |
307 | int len; | |
308 | struct auth_domain *dom; | |
309 | struct knfsd_fh fh; | |
310 | ||
87d26ea7 BF |
311 | if (size == 0) |
312 | return -EINVAL; | |
313 | ||
1da177e4 LT |
314 | if (buf[size-1] != '\n') |
315 | return -EINVAL; | |
316 | buf[size-1] = 0; | |
317 | ||
318 | dname = mesg; | |
319 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
320 | if (len <= 0) |
321 | return -EINVAL; | |
1da177e4 LT |
322 | |
323 | path = dname+len+1; | |
324 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
325 | if (len <= 0) |
326 | return -EINVAL; | |
1da177e4 LT |
327 | |
328 | len = get_int(&mesg, &maxsize); | |
329 | if (len) | |
330 | return len; | |
331 | ||
332 | if (maxsize < NFS_FHSIZE) | |
333 | return -EINVAL; | |
334 | if (maxsize > NFS3_FHSIZE) | |
335 | maxsize = NFS3_FHSIZE; | |
336 | ||
337 | if (qword_get(&mesg, mesg, size)>0) | |
338 | return -EINVAL; | |
339 | ||
340 | /* we have all the words, they are in buf.. */ | |
341 | dom = unix_domain_find(dname); | |
342 | if (!dom) | |
343 | return -ENOMEM; | |
344 | ||
345 | len = exp_rootfh(dom, path, &fh, maxsize); | |
346 | auth_domain_put(dom); | |
347 | if (len) | |
348 | return len; | |
349 | ||
54224f04 CL |
350 | mesg = buf; |
351 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
352 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
353 | mesg[-1] = '\n'; | |
354 | return mesg - buf; | |
355 | } | |
356 | ||
262a0982 CL |
357 | /** |
358 | * write_threads - Start NFSD, or report the current number of running threads | |
359 | * | |
360 | * Input: | |
361 | * buf: ignored | |
362 | * size: zero | |
363 | * Output: | |
364 | * On success: passed-in buffer filled with '\n'-terminated C | |
365 | * string numeric value representing the number of | |
366 | * running NFSD threads; | |
367 | * return code is the size in bytes of the string | |
368 | * On error: return code is zero | |
369 | * | |
370 | * OR | |
371 | * | |
372 | * Input: | |
373 | * buf: C string containing an unsigned | |
374 | * integer value representing the | |
375 | * number of NFSD threads to start | |
376 | * size: non-zero length of C string in @buf | |
377 | * Output: | |
378 | * On success: NFS service is started; | |
379 | * passed-in buffer filled with '\n'-terminated C | |
380 | * string numeric value representing the number of | |
381 | * running NFSD threads; | |
382 | * return code is the size in bytes of the string | |
383 | * On error: return code is zero or a negative errno value | |
384 | */ | |
1da177e4 LT |
385 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
386 | { | |
1da177e4 LT |
387 | char *mesg = buf; |
388 | int rv; | |
389 | if (size > 0) { | |
390 | int newthreads; | |
391 | rv = get_int(&mesg, &newthreads); | |
392 | if (rv) | |
393 | return rv; | |
9e074856 | 394 | if (newthreads < 0) |
1da177e4 | 395 | return -EINVAL; |
9e074856 | 396 | rv = nfsd_svc(NFS_PORT, newthreads); |
82e12fe9 | 397 | if (rv < 0) |
1da177e4 | 398 | return rv; |
82e12fe9 N |
399 | } else |
400 | rv = nfsd_nrthreads(); | |
e06b6405 | 401 | |
82e12fe9 | 402 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
403 | } |
404 | ||
262a0982 CL |
405 | /** |
406 | * write_pool_threads - Set or report the current number of threads per pool | |
407 | * | |
408 | * Input: | |
409 | * buf: ignored | |
410 | * size: zero | |
411 | * | |
412 | * OR | |
413 | * | |
414 | * Input: | |
415 | * buf: C string containing whitespace- | |
416 | * separated unsigned integer values | |
417 | * representing the number of NFSD | |
418 | * threads to start in each pool | |
419 | * size: non-zero length of C string in @buf | |
420 | * Output: | |
421 | * On success: passed-in buffer filled with '\n'-terminated C | |
422 | * string containing integer values representing the | |
423 | * number of NFSD threads in each pool; | |
424 | * return code is the size in bytes of the string | |
425 | * On error: return code is zero or a negative errno value | |
426 | */ | |
eed2965a GB |
427 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
428 | { | |
429 | /* if size > 0, look for an array of number of threads per node | |
430 | * and apply them then write out number of threads per node as reply | |
431 | */ | |
432 | char *mesg = buf; | |
433 | int i; | |
434 | int rv; | |
435 | int len; | |
bedbdd8b | 436 | int npools; |
eed2965a GB |
437 | int *nthreads; |
438 | ||
bedbdd8b NB |
439 | mutex_lock(&nfsd_mutex); |
440 | npools = nfsd_nrpools(); | |
eed2965a GB |
441 | if (npools == 0) { |
442 | /* | |
443 | * NFS is shut down. The admin can start it by | |
444 | * writing to the threads file but NOT the pool_threads | |
445 | * file, sorry. Report zero threads. | |
446 | */ | |
bedbdd8b | 447 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
448 | strcpy(buf, "0\n"); |
449 | return strlen(buf); | |
450 | } | |
451 | ||
452 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 453 | rv = -ENOMEM; |
eed2965a | 454 | if (nthreads == NULL) |
bedbdd8b | 455 | goto out_free; |
eed2965a GB |
456 | |
457 | if (size > 0) { | |
458 | for (i = 0; i < npools; i++) { | |
459 | rv = get_int(&mesg, &nthreads[i]); | |
460 | if (rv == -ENOENT) | |
461 | break; /* fewer numbers than pools */ | |
462 | if (rv) | |
463 | goto out_free; /* syntax error */ | |
464 | rv = -EINVAL; | |
465 | if (nthreads[i] < 0) | |
466 | goto out_free; | |
467 | } | |
468 | rv = nfsd_set_nrthreads(i, nthreads); | |
469 | if (rv) | |
470 | goto out_free; | |
471 | } | |
472 | ||
473 | rv = nfsd_get_nrthreads(npools, nthreads); | |
474 | if (rv) | |
475 | goto out_free; | |
476 | ||
477 | mesg = buf; | |
478 | size = SIMPLE_TRANSACTION_LIMIT; | |
479 | for (i = 0; i < npools && size > 0; i++) { | |
480 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
481 | len = strlen(mesg); | |
482 | size -= len; | |
483 | mesg += len; | |
484 | } | |
413d63d7 | 485 | rv = mesg - buf; |
eed2965a GB |
486 | out_free: |
487 | kfree(nthreads); | |
bedbdd8b | 488 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
489 | return rv; |
490 | } | |
491 | ||
3dd98a3b | 492 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 493 | { |
70c3b76c | 494 | char *mesg = buf; |
8daf220a | 495 | char *vers, *minorp, sign; |
261758b5 | 496 | int len, num, remaining; |
8daf220a | 497 | unsigned minor; |
70c3b76c N |
498 | ssize_t tlen = 0; |
499 | char *sep; | |
500 | ||
501 | if (size>0) { | |
502 | if (nfsd_serv) | |
6658d3a7 N |
503 | /* Cannot change versions without updating |
504 | * nfsd_serv->sv_xdrsize, and reallocing | |
505 | * rq_argp and rq_resp | |
506 | */ | |
70c3b76c N |
507 | return -EBUSY; |
508 | if (buf[size-1] != '\n') | |
509 | return -EINVAL; | |
510 | buf[size-1] = 0; | |
511 | ||
512 | vers = mesg; | |
513 | len = qword_get(&mesg, vers, size); | |
514 | if (len <= 0) return -EINVAL; | |
515 | do { | |
516 | sign = *vers; | |
517 | if (sign == '+' || sign == '-') | |
8daf220a | 518 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 519 | else |
8daf220a BH |
520 | num = simple_strtol(vers, &minorp, 0); |
521 | if (*minorp == '.') { | |
522 | if (num < 4) | |
523 | return -EINVAL; | |
524 | minor = simple_strtoul(minorp+1, NULL, 0); | |
525 | if (minor == 0) | |
526 | return -EINVAL; | |
527 | if (nfsd_minorversion(minor, sign == '-' ? | |
528 | NFSD_CLEAR : NFSD_SET) < 0) | |
529 | return -EINVAL; | |
530 | goto next; | |
531 | } | |
70c3b76c N |
532 | switch(num) { |
533 | case 2: | |
534 | case 3: | |
535 | case 4: | |
6658d3a7 | 536 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
537 | break; |
538 | default: | |
539 | return -EINVAL; | |
540 | } | |
8daf220a | 541 | next: |
70c3b76c | 542 | vers += len + 1; |
70c3b76c N |
543 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
544 | /* If all get turned off, turn them back on, as | |
545 | * having no versions is BAD | |
546 | */ | |
6658d3a7 | 547 | nfsd_reset_versions(); |
70c3b76c | 548 | } |
261758b5 | 549 | |
70c3b76c N |
550 | /* Now write current state into reply buffer */ |
551 | len = 0; | |
552 | sep = ""; | |
261758b5 | 553 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 554 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 555 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 556 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 557 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
558 | num); |
559 | sep = " "; | |
261758b5 CL |
560 | |
561 | if (len > remaining) | |
562 | break; | |
563 | remaining -= len; | |
564 | buf += len; | |
565 | tlen += len; | |
70c3b76c | 566 | } |
8daf220a | 567 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
568 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
569 | minor++) { | |
570 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
571 | (nfsd_vers(4, NFSD_TEST) && |
572 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
573 | '+' : '-', | |
574 | minor); | |
261758b5 CL |
575 | |
576 | if (len > remaining) | |
577 | break; | |
578 | remaining -= len; | |
579 | buf += len; | |
580 | tlen += len; | |
581 | } | |
582 | ||
583 | len = snprintf(buf, remaining, "\n"); | |
584 | if (len > remaining) | |
585 | return -EINVAL; | |
586 | return tlen + len; | |
70c3b76c N |
587 | } |
588 | ||
262a0982 CL |
589 | /** |
590 | * write_versions - Set or report the available NFS protocol versions | |
591 | * | |
592 | * Input: | |
593 | * buf: ignored | |
594 | * size: zero | |
595 | * Output: | |
596 | * On success: passed-in buffer filled with '\n'-terminated C | |
597 | * string containing positive or negative integer | |
598 | * values representing the current status of each | |
599 | * protocol version; | |
600 | * return code is the size in bytes of the string | |
601 | * On error: return code is zero or a negative errno value | |
602 | * | |
603 | * OR | |
604 | * | |
605 | * Input: | |
606 | * buf: C string containing whitespace- | |
607 | * separated positive or negative | |
608 | * integer values representing NFS | |
609 | * protocol versions to enable ("+n") | |
610 | * or disable ("-n") | |
611 | * size: non-zero length of C string in @buf | |
612 | * Output: | |
613 | * On success: status of zero or more protocol versions has | |
614 | * been updated; passed-in buffer filled with | |
615 | * '\n'-terminated C string containing positive | |
616 | * or negative integer values representing the | |
617 | * current status of each protocol version; | |
618 | * return code is the size in bytes of the string | |
619 | * On error: return code is zero or a negative errno value | |
620 | */ | |
3dd98a3b JL |
621 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
622 | { | |
623 | ssize_t rv; | |
624 | ||
625 | mutex_lock(&nfsd_mutex); | |
626 | rv = __write_versions(file, buf, size); | |
627 | mutex_unlock(&nfsd_mutex); | |
628 | return rv; | |
629 | } | |
630 | ||
0a5372d8 CL |
631 | /* |
632 | * Zero-length write. Return a list of NFSD's current listener | |
633 | * transports. | |
634 | */ | |
635 | static ssize_t __write_ports_names(char *buf) | |
636 | { | |
637 | if (nfsd_serv == NULL) | |
638 | return 0; | |
335c54bd | 639 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
640 | } |
641 | ||
0b7c2f6f CL |
642 | /* |
643 | * A single 'fd' number was written, in which case it must be for | |
644 | * a socket of a supported family/protocol, and we use it as an | |
645 | * nfsd listener. | |
646 | */ | |
647 | static ssize_t __write_ports_addfd(char *buf) | |
648 | { | |
649 | char *mesg = buf; | |
650 | int fd, err; | |
651 | ||
652 | err = get_int(&mesg, &fd); | |
653 | if (err != 0 || fd < 0) | |
654 | return -EINVAL; | |
655 | ||
656 | err = nfsd_create_serv(); | |
657 | if (err != 0) | |
658 | return err; | |
659 | ||
bfba9ab4 | 660 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
78a8d7c8 | 661 | if (err < 0) { |
78a8d7c8 JL |
662 | svc_destroy(nfsd_serv); |
663 | return err; | |
664 | } | |
0b7c2f6f | 665 | |
ea068bad CL |
666 | /* Decrease the count, but don't shut down the service */ |
667 | nfsd_serv->sv_nrthreads--; | |
668 | return err; | |
0b7c2f6f CL |
669 | } |
670 | ||
82d56591 CL |
671 | /* |
672 | * A '-' followed by the 'name' of a socket means we close the socket. | |
673 | */ | |
674 | static ssize_t __write_ports_delfd(char *buf) | |
675 | { | |
676 | char *toclose; | |
677 | int len = 0; | |
678 | ||
679 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
680 | if (toclose == NULL) | |
681 | return -ENOMEM; | |
682 | ||
683 | if (nfsd_serv != NULL) | |
8435d34d CL |
684 | len = svc_sock_names(nfsd_serv, buf, |
685 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
82d56591 CL |
686 | kfree(toclose); |
687 | return len; | |
688 | } | |
689 | ||
4eb68c26 CL |
690 | /* |
691 | * A transport listener is added by writing it's transport name and | |
692 | * a port number. | |
693 | */ | |
694 | static ssize_t __write_ports_addxprt(char *buf) | |
695 | { | |
696 | char transport[16]; | |
37498292 | 697 | struct svc_xprt *xprt; |
4eb68c26 CL |
698 | int port, err; |
699 | ||
700 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
701 | return -EINVAL; | |
702 | ||
4be929be | 703 | if (port < 1 || port > USHRT_MAX) |
4eb68c26 CL |
704 | return -EINVAL; |
705 | ||
706 | err = nfsd_create_serv(); | |
707 | if (err != 0) | |
708 | return err; | |
709 | ||
fc5d00b0 | 710 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
4eb68c26 | 711 | PF_INET, port, SVC_SOCK_ANONYMOUS); |
68717908 | 712 | if (err < 0) |
37498292 CL |
713 | goto out_err; |
714 | ||
fc5d00b0 | 715 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
37498292 CL |
716 | PF_INET6, port, SVC_SOCK_ANONYMOUS); |
717 | if (err < 0 && err != -EAFNOSUPPORT) | |
718 | goto out_close; | |
0cd14a06 JL |
719 | |
720 | /* Decrease the count, but don't shut down the service */ | |
721 | nfsd_serv->sv_nrthreads--; | |
4eb68c26 | 722 | return 0; |
37498292 CL |
723 | out_close: |
724 | xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); | |
725 | if (xprt != NULL) { | |
726 | svc_close_xprt(xprt); | |
727 | svc_xprt_put(xprt); | |
728 | } | |
729 | out_err: | |
0cd14a06 | 730 | svc_destroy(nfsd_serv); |
37498292 | 731 | return err; |
4eb68c26 CL |
732 | } |
733 | ||
4cd5dc75 CL |
734 | /* |
735 | * A transport listener is removed by writing a "-", it's transport | |
736 | * name, and it's port number. | |
737 | */ | |
738 | static ssize_t __write_ports_delxprt(char *buf) | |
739 | { | |
740 | struct svc_xprt *xprt; | |
741 | char transport[16]; | |
742 | int port; | |
743 | ||
744 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
745 | return -EINVAL; | |
746 | ||
4be929be | 747 | if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) |
4cd5dc75 CL |
748 | return -EINVAL; |
749 | ||
750 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
751 | if (xprt == NULL) | |
752 | return -ENOTCONN; | |
753 | ||
754 | svc_close_xprt(xprt); | |
755 | svc_xprt_put(xprt); | |
756 | return 0; | |
757 | } | |
758 | ||
bedbdd8b | 759 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 760 | { |
0a5372d8 CL |
761 | if (size == 0) |
762 | return __write_ports_names(buf); | |
0b7c2f6f CL |
763 | |
764 | if (isdigit(buf[0])) | |
765 | return __write_ports_addfd(buf); | |
82d56591 CL |
766 | |
767 | if (buf[0] == '-' && isdigit(buf[1])) | |
768 | return __write_ports_delfd(buf); | |
4eb68c26 CL |
769 | |
770 | if (isalpha(buf[0])) | |
771 | return __write_ports_addxprt(buf); | |
4cd5dc75 CL |
772 | |
773 | if (buf[0] == '-' && isalpha(buf[1])) | |
774 | return __write_ports_delxprt(buf); | |
775 | ||
b41b66d6 | 776 | return -EINVAL; |
80212d59 N |
777 | } |
778 | ||
262a0982 CL |
779 | /** |
780 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
781 | * | |
782 | * Input: | |
783 | * buf: ignored | |
784 | * size: zero | |
785 | * Output: | |
786 | * On success: passed-in buffer filled with a '\n'-terminated C | |
787 | * string containing a whitespace-separated list of | |
788 | * named NFSD listeners; | |
789 | * return code is the size in bytes of the string | |
790 | * On error: return code is zero or a negative errno value | |
791 | * | |
792 | * OR | |
793 | * | |
794 | * Input: | |
795 | * buf: C string containing an unsigned | |
796 | * integer value representing a bound | |
797 | * but unconnected socket that is to be | |
c71206a7 CL |
798 | * used as an NFSD listener; listen(3) |
799 | * must be called for a SOCK_STREAM | |
800 | * socket, otherwise it is ignored | |
262a0982 CL |
801 | * size: non-zero length of C string in @buf |
802 | * Output: | |
803 | * On success: NFS service is started; | |
804 | * passed-in buffer filled with a '\n'-terminated C | |
805 | * string containing a unique alphanumeric name of | |
806 | * the listener; | |
807 | * return code is the size in bytes of the string | |
808 | * On error: return code is a negative errno value | |
809 | * | |
810 | * OR | |
811 | * | |
812 | * Input: | |
813 | * buf: C string containing a "-" followed | |
814 | * by an integer value representing a | |
815 | * previously passed in socket file | |
816 | * descriptor | |
817 | * size: non-zero length of C string in @buf | |
818 | * Output: | |
819 | * On success: NFS service no longer listens on that socket; | |
820 | * passed-in buffer filled with a '\n'-terminated C | |
821 | * string containing a unique name of the listener; | |
822 | * return code is the size in bytes of the string | |
823 | * On error: return code is a negative errno value | |
824 | * | |
825 | * OR | |
826 | * | |
827 | * Input: | |
828 | * buf: C string containing a transport | |
829 | * name and an unsigned integer value | |
830 | * representing the port to listen on, | |
831 | * separated by whitespace | |
832 | * size: non-zero length of C string in @buf | |
833 | * Output: | |
834 | * On success: returns zero; NFS service is started | |
835 | * On error: return code is a negative errno value | |
836 | * | |
837 | * OR | |
838 | * | |
839 | * Input: | |
840 | * buf: C string containing a "-" followed | |
841 | * by a transport name and an unsigned | |
842 | * integer value representing the port | |
843 | * to listen on, separated by whitespace | |
844 | * size: non-zero length of C string in @buf | |
845 | * Output: | |
846 | * On success: returns zero; NFS service no longer listens | |
847 | * on that transport | |
848 | * On error: return code is a negative errno value | |
849 | */ | |
bedbdd8b NB |
850 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
851 | { | |
852 | ssize_t rv; | |
3dd98a3b | 853 | |
bedbdd8b NB |
854 | mutex_lock(&nfsd_mutex); |
855 | rv = __write_ports(file, buf, size); | |
856 | mutex_unlock(&nfsd_mutex); | |
857 | return rv; | |
858 | } | |
859 | ||
860 | ||
596bbe53 N |
861 | int nfsd_max_blksize; |
862 | ||
262a0982 CL |
863 | /** |
864 | * write_maxblksize - Set or report the current NFS blksize | |
865 | * | |
866 | * Input: | |
867 | * buf: ignored | |
868 | * size: zero | |
869 | * | |
870 | * OR | |
871 | * | |
872 | * Input: | |
873 | * buf: C string containing an unsigned | |
874 | * integer value representing the new | |
875 | * NFS blksize | |
876 | * size: non-zero length of C string in @buf | |
877 | * Output: | |
878 | * On success: passed-in buffer filled with '\n'-terminated C string | |
879 | * containing numeric value of the current NFS blksize | |
880 | * setting; | |
881 | * return code is the size in bytes of the string | |
882 | * On error: return code is zero or a negative errno value | |
883 | */ | |
596bbe53 N |
884 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
885 | { | |
886 | char *mesg = buf; | |
887 | if (size > 0) { | |
888 | int bsize; | |
889 | int rv = get_int(&mesg, &bsize); | |
890 | if (rv) | |
891 | return rv; | |
892 | /* force bsize into allowed range and | |
893 | * required alignment. | |
894 | */ | |
895 | if (bsize < 1024) | |
896 | bsize = 1024; | |
897 | if (bsize > NFSSVC_MAXBLKSIZE) | |
898 | bsize = NFSSVC_MAXBLKSIZE; | |
899 | bsize &= ~(1024-1); | |
bedbdd8b | 900 | mutex_lock(&nfsd_mutex); |
7fa53cc8 | 901 | if (nfsd_serv) { |
bedbdd8b | 902 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
903 | return -EBUSY; |
904 | } | |
905 | nfsd_max_blksize = bsize; | |
bedbdd8b | 906 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 907 | } |
e06b6405 CL |
908 | |
909 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
910 | nfsd_max_blksize); | |
596bbe53 N |
911 | } |
912 | ||
70c3b76c | 913 | #ifdef CONFIG_NFSD_V4 |
f0135740 | 914 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) |
1da177e4 | 915 | { |
1da177e4 | 916 | char *mesg = buf; |
f0135740 | 917 | int rv, i; |
1da177e4 LT |
918 | |
919 | if (size > 0) { | |
3dd98a3b JL |
920 | if (nfsd_serv) |
921 | return -EBUSY; | |
f0135740 | 922 | rv = get_int(&mesg, &i); |
1da177e4 LT |
923 | if (rv) |
924 | return rv; | |
e7b184f1 BF |
925 | /* |
926 | * Some sanity checking. We don't have a reason for | |
927 | * these particular numbers, but problems with the | |
928 | * extremes are: | |
929 | * - Too short: the briefest network outage may | |
930 | * cause clients to lose all their locks. Also, | |
931 | * the frequent polling may be wasteful. | |
932 | * - Too long: do you really want reboot recovery | |
933 | * to take more than an hour? Or to make other | |
934 | * clients wait an hour before being able to | |
935 | * revoke a dead client's locks? | |
936 | */ | |
f0135740 | 937 | if (i < 10 || i > 3600) |
1da177e4 | 938 | return -EINVAL; |
f0135740 | 939 | *time = i; |
1da177e4 | 940 | } |
e06b6405 | 941 | |
f0135740 BF |
942 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); |
943 | } | |
944 | ||
945 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) | |
946 | { | |
947 | ssize_t rv; | |
948 | ||
949 | mutex_lock(&nfsd_mutex); | |
950 | rv = __nfsd4_write_time(file, buf, size, time); | |
951 | mutex_unlock(&nfsd_mutex); | |
952 | return rv; | |
1da177e4 LT |
953 | } |
954 | ||
262a0982 CL |
955 | /** |
956 | * write_leasetime - Set or report the current NFSv4 lease time | |
957 | * | |
958 | * Input: | |
959 | * buf: ignored | |
960 | * size: zero | |
961 | * | |
962 | * OR | |
963 | * | |
964 | * Input: | |
965 | * buf: C string containing an unsigned | |
966 | * integer value representing the new | |
967 | * NFSv4 lease expiry time | |
968 | * size: non-zero length of C string in @buf | |
969 | * Output: | |
970 | * On success: passed-in buffer filled with '\n'-terminated C | |
971 | * string containing unsigned integer value of the | |
972 | * current lease expiry time; | |
973 | * return code is the size in bytes of the string | |
974 | * On error: return code is zero or a negative errno value | |
975 | */ | |
3dd98a3b JL |
976 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
977 | { | |
f0135740 | 978 | return nfsd4_write_time(file, buf, size, &nfsd4_lease); |
3dd98a3b JL |
979 | } |
980 | ||
efc4bb4f BF |
981 | /** |
982 | * write_gracetime - Set or report current NFSv4 grace period time | |
983 | * | |
984 | * As above, but sets the time of the NFSv4 grace period. | |
985 | * | |
986 | * Note this should never be set to less than the *previous* | |
987 | * lease-period time, but we don't try to enforce this. (In the common | |
988 | * case (a new boot), we don't know what the previous lease time was | |
989 | * anyway.) | |
990 | */ | |
991 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
992 | { | |
993 | return nfsd4_write_time(file, buf, size, &nfsd4_grace); | |
994 | } | |
995 | ||
3dd98a3b JL |
996 | extern char *nfs4_recoverydir(void); |
997 | ||
998 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
999 | { |
1000 | char *mesg = buf; | |
1001 | char *recdir; | |
1002 | int len, status; | |
1003 | ||
3dd98a3b JL |
1004 | if (size > 0) { |
1005 | if (nfsd_serv) | |
1006 | return -EBUSY; | |
1007 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1008 | return -EINVAL; | |
1009 | buf[size-1] = 0; | |
0964a3d3 | 1010 | |
3dd98a3b JL |
1011 | recdir = mesg; |
1012 | len = qword_get(&mesg, recdir, size); | |
1013 | if (len <= 0) | |
1014 | return -EINVAL; | |
0964a3d3 | 1015 | |
3dd98a3b | 1016 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1017 | if (status) |
1018 | return status; | |
3dd98a3b | 1019 | } |
3d72ab8f CL |
1020 | |
1021 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1022 | nfs4_recoverydir()); | |
0964a3d3 | 1023 | } |
3dd98a3b | 1024 | |
262a0982 CL |
1025 | /** |
1026 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1027 | * | |
1028 | * Input: | |
1029 | * buf: ignored | |
1030 | * size: zero | |
1031 | * | |
1032 | * OR | |
1033 | * | |
1034 | * Input: | |
1035 | * buf: C string containing the pathname | |
1036 | * of the directory on a local file | |
1037 | * system containing permanent NFSv4 | |
1038 | * recovery data | |
1039 | * size: non-zero length of C string in @buf | |
1040 | * Output: | |
1041 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1042 | * containing the current recovery pathname setting; | |
1043 | * return code is the size in bytes of the string | |
1044 | * On error: return code is zero or a negative errno value | |
1045 | */ | |
3dd98a3b JL |
1046 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1047 | { | |
1048 | ssize_t rv; | |
1049 | ||
1050 | mutex_lock(&nfsd_mutex); | |
1051 | rv = __write_recoverydir(file, buf, size); | |
1052 | mutex_unlock(&nfsd_mutex); | |
1053 | return rv; | |
1054 | } | |
1055 | ||
70c3b76c | 1056 | #endif |
0964a3d3 | 1057 | |
1da177e4 LT |
1058 | /*----------------------------------------------------------------------------*/ |
1059 | /* | |
1060 | * populating the filesystem. | |
1061 | */ | |
1062 | ||
1063 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1064 | { | |
1065 | static struct tree_descr nfsd_files[] = { | |
1da177e4 | 1066 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, |
e8e8753f BF |
1067 | [NFSD_Export_features] = {"export_features", |
1068 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1069 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1070 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1071 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1072 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1073 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1074 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1075 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1076 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
70c3b76c | 1077 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1078 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1079 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
b084f598 | 1080 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 | 1081 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
b084f598 | 1082 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
1da177e4 LT |
1083 | #ifdef CONFIG_NFSD_V4 |
1084 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1085 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1086 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1087 | #endif |
1088 | /* last one */ {""} | |
1089 | }; | |
1090 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1091 | } | |
1092 | ||
fc14f2fe AV |
1093 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, |
1094 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1095 | { |
fc14f2fe | 1096 | return mount_single(fs_type, flags, data, nfsd_fill_super); |
1da177e4 LT |
1097 | } |
1098 | ||
1099 | static struct file_system_type nfsd_fs_type = { | |
1100 | .owner = THIS_MODULE, | |
1101 | .name = "nfsd", | |
fc14f2fe | 1102 | .mount = nfsd_mount, |
1da177e4 LT |
1103 | .kill_sb = kill_litter_super, |
1104 | }; | |
1105 | ||
e331f606 BF |
1106 | #ifdef CONFIG_PROC_FS |
1107 | static int create_proc_exports_entry(void) | |
1108 | { | |
1109 | struct proc_dir_entry *entry; | |
1110 | ||
1111 | entry = proc_mkdir("fs/nfs", NULL); | |
1112 | if (!entry) | |
1113 | return -ENOMEM; | |
9ef2db26 | 1114 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1115 | if (!entry) |
1116 | return -ENOMEM; | |
e331f606 BF |
1117 | return 0; |
1118 | } | |
1119 | #else /* CONFIG_PROC_FS */ | |
1120 | static int create_proc_exports_entry(void) | |
1121 | { | |
1122 | return 0; | |
1123 | } | |
1124 | #endif | |
1125 | ||
1da177e4 LT |
1126 | static int __init init_nfsd(void) |
1127 | { | |
1128 | int retval; | |
1129 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1130 | ||
e8ff2a84 BF |
1131 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1132 | if (retval) | |
1133 | return retval; | |
1da177e4 | 1134 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1135 | retval = nfsd_reply_cache_init(); |
1136 | if (retval) | |
1137 | goto out_free_stat; | |
dbf847ec BF |
1138 | retval = nfsd_export_init(); |
1139 | if (retval) | |
1140 | goto out_free_cache; | |
1da177e4 | 1141 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1142 | retval = nfsd_idmap_init(); |
1143 | if (retval) | |
1144 | goto out_free_lockd; | |
e331f606 BF |
1145 | retval = create_proc_exports_entry(); |
1146 | if (retval) | |
1147 | goto out_free_idmap; | |
1da177e4 | 1148 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1149 | if (retval) |
1150 | goto out_free_all; | |
1151 | return 0; | |
1152 | out_free_all: | |
26808d3f BF |
1153 | remove_proc_entry("fs/nfs/exports", NULL); |
1154 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1155 | out_free_idmap: |
dbf847ec BF |
1156 | nfsd_idmap_shutdown(); |
1157 | out_free_lockd: | |
26808d3f | 1158 | nfsd_lockd_shutdown(); |
e331f606 | 1159 | nfsd_export_shutdown(); |
dbf847ec | 1160 | out_free_cache: |
e331f606 | 1161 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1162 | out_free_stat: |
1163 | nfsd_stat_shutdown(); | |
26808d3f | 1164 | nfsd4_free_slabs(); |
1da177e4 LT |
1165 | return retval; |
1166 | } | |
1167 | ||
1168 | static void __exit exit_nfsd(void) | |
1169 | { | |
1170 | nfsd_export_shutdown(); | |
d5c3428b | 1171 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1172 | remove_proc_entry("fs/nfs/exports", NULL); |
1173 | remove_proc_entry("fs/nfs", NULL); | |
1174 | nfsd_stat_shutdown(); | |
1175 | nfsd_lockd_shutdown(); | |
1da177e4 | 1176 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1177 | nfsd4_free_slabs(); |
1da177e4 LT |
1178 | unregister_filesystem(&nfsd_fs_type); |
1179 | } | |
1180 | ||
1181 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1182 | MODULE_LICENSE("GPL"); | |
1183 | module_init(init_nfsd) | |
1184 | module_exit(exit_nfsd) |