Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Syscall interface to knfsd. |
4 | * | |
5 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
6 | */ | |
7 | ||
5a0e3ad6 | 8 | #include <linux/slab.h> |
3f8206d4 | 9 | #include <linux/namei.h> |
b41b66d6 | 10 | #include <linux/ctype.h> |
96a374a3 | 11 | #include <linux/fs_context.h> |
1da177e4 | 12 | |
80212d59 | 13 | #include <linux/sunrpc/svcsock.h> |
4373ea84 | 14 | #include <linux/lockd/lockd.h> |
5976687a | 15 | #include <linux/sunrpc/addr.h> |
b0b0c0a2 | 16 | #include <linux/sunrpc/gss_api.h> |
b084f598 | 17 | #include <linux/sunrpc/gss_krb5_enctypes.h> |
813fd320 | 18 | #include <linux/sunrpc/rpc_pipe_fs.h> |
143cb494 | 19 | #include <linux/module.h> |
e8a79fb1 | 20 | #include <linux/fsnotify.h> |
1da177e4 | 21 | |
2ca72e17 | 22 | #include "idmap.h" |
9a74af21 BH |
23 | #include "nfsd.h" |
24 | #include "cache.h" | |
f3c7521f | 25 | #include "state.h" |
7ea34ac1 | 26 | #include "netns.h" |
9cf514cc | 27 | #include "pnfs.h" |
9a74af21 | 28 | |
1da177e4 | 29 | /* |
b0b0c0a2 | 30 | * We have a single directory with several nodes in it. |
1da177e4 LT |
31 | */ |
32 | enum { | |
33 | NFSD_Root = 1, | |
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, |
a2f999a3 | 42 | NFSD_Reply_Cache_Stats, |
70c3b76c | 43 | NFSD_Versions, |
80212d59 | 44 | NFSD_Ports, |
596bbe53 | 45 | NFSD_MaxBlkSize, |
5b8db00b | 46 | NFSD_MaxConnections, |
b0b0c0a2 | 47 | NFSD_SupportedEnctypes, |
70c3b76c N |
48 | /* |
49 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
50 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
51 | */ | |
52 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 53 | NFSD_Leasetime, |
efc4bb4f | 54 | NFSD_Gracetime, |
0964a3d3 | 55 | NFSD_RecoveryDir, |
7f5ef2e9 | 56 | NFSD_V4EndGrace, |
70c3b76c | 57 | #endif |
e8a79fb1 | 58 | NFSD_MaxReserved |
1da177e4 LT |
59 | }; |
60 | ||
61 | /* | |
62 | * write() for these nodes. | |
63 | */ | |
1da177e4 | 64 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
65 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
66 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 67 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 68 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 69 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 70 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 71 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
5b8db00b | 72 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size); |
70c3b76c | 73 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 74 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 75 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 76 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
7f5ef2e9 | 77 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); |
70c3b76c | 78 | #endif |
1da177e4 | 79 | |
c2cdc2ab | 80 | static ssize_t (*const write_op[])(struct file *, char *, size_t) = { |
1da177e4 | 81 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
82 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
83 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 84 | [NFSD_Threads] = write_threads, |
eed2965a | 85 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 86 | [NFSD_Versions] = write_versions, |
80212d59 | 87 | [NFSD_Ports] = write_ports, |
596bbe53 | 88 | [NFSD_MaxBlkSize] = write_maxblksize, |
5b8db00b | 89 | [NFSD_MaxConnections] = write_maxconn, |
70c3b76c | 90 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 91 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 92 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 93 | [NFSD_RecoveryDir] = write_recoverydir, |
7f5ef2e9 | 94 | [NFSD_V4EndGrace] = write_v4_end_grace, |
70c3b76c | 95 | #endif |
1da177e4 LT |
96 | }; |
97 | ||
98 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
99 | { | |
496ad9aa | 100 | ino_t ino = file_inode(file)->i_ino; |
1da177e4 LT |
101 | char *data; |
102 | ssize_t rv; | |
103 | ||
e8c96f8c | 104 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
105 | return -EINVAL; |
106 | ||
107 | data = simple_transaction_get(file, buf, size); | |
108 | if (IS_ERR(data)) | |
109 | return PTR_ERR(data); | |
110 | ||
111 | rv = write_op[ino](file, data, size); | |
8971a101 | 112 | if (rv >= 0) { |
1da177e4 LT |
113 | simple_transaction_set(file, rv); |
114 | rv = size; | |
115 | } | |
116 | return rv; | |
117 | } | |
118 | ||
7390022d N |
119 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
120 | { | |
121 | if (! file->private_data) { | |
122 | /* An attempt to read a transaction file without writing | |
123 | * causes a 0-byte write so that the file can return | |
124 | * state information | |
125 | */ | |
126 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
127 | if (rv < 0) | |
128 | return rv; | |
129 | } | |
130 | return simple_transaction_read(file, buf, size, pos); | |
131 | } | |
132 | ||
4b6f5d20 | 133 | static const struct file_operations transaction_ops = { |
1da177e4 | 134 | .write = nfsctl_transaction_write, |
7390022d | 135 | .read = nfsctl_transaction_read, |
1da177e4 | 136 | .release = simple_transaction_release, |
6038f373 | 137 | .llseek = default_llseek, |
1da177e4 LT |
138 | }; |
139 | ||
96d851c4 | 140 | static int exports_net_open(struct net *net, struct file *file) |
1da177e4 | 141 | { |
f2c7ea10 SK |
142 | int err; |
143 | struct seq_file *seq; | |
96d851c4 | 144 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
f2c7ea10 SK |
145 | |
146 | err = seq_open(file, &nfs_exports_op); | |
147 | if (err) | |
148 | return err; | |
149 | ||
150 | seq = file->private_data; | |
e5f06f72 | 151 | seq->private = nn->svc_export_cache; |
f2c7ea10 | 152 | return 0; |
1da177e4 LT |
153 | } |
154 | ||
96d851c4 SK |
155 | static int exports_proc_open(struct inode *inode, struct file *file) |
156 | { | |
157 | return exports_net_open(current->nsproxy->net_ns, file); | |
158 | } | |
159 | ||
97a32539 AD |
160 | static const struct proc_ops exports_proc_ops = { |
161 | .proc_open = exports_proc_open, | |
162 | .proc_read = seq_read, | |
163 | .proc_lseek = seq_lseek, | |
164 | .proc_release = seq_release, | |
96d851c4 SK |
165 | }; |
166 | ||
167 | static int exports_nfsd_open(struct inode *inode, struct file *file) | |
168 | { | |
169 | return exports_net_open(inode->i_sb->s_fs_info, file); | |
170 | } | |
171 | ||
172 | static const struct file_operations exports_nfsd_operations = { | |
173 | .open = exports_nfsd_open, | |
1da177e4 LT |
174 | .read = seq_read, |
175 | .llseek = seq_lseek, | |
176 | .release = seq_release, | |
177 | }; | |
178 | ||
e8e8753f BF |
179 | static int export_features_show(struct seq_file *m, void *v) |
180 | { | |
181 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static int export_features_open(struct inode *inode, struct file *file) | |
186 | { | |
187 | return single_open(file, export_features_show, NULL); | |
188 | } | |
189 | ||
75ef9de1 | 190 | static const struct file_operations export_features_operations = { |
e8e8753f BF |
191 | .open = export_features_open, |
192 | .read = seq_read, | |
193 | .llseek = seq_lseek, | |
194 | .release = single_release, | |
195 | }; | |
196 | ||
b084f598 | 197 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 KC |
198 | static int supported_enctypes_show(struct seq_file *m, void *v) |
199 | { | |
b084f598 | 200 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); |
b0b0c0a2 KC |
201 | return 0; |
202 | } | |
203 | ||
204 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
205 | { | |
206 | return single_open(file, supported_enctypes_show, NULL); | |
207 | } | |
208 | ||
75ef9de1 | 209 | static const struct file_operations supported_enctypes_ops = { |
b0b0c0a2 KC |
210 | .open = supported_enctypes_open, |
211 | .read = seq_read, | |
212 | .llseek = seq_lseek, | |
213 | .release = single_release, | |
214 | }; | |
b084f598 | 215 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
b0b0c0a2 | 216 | |
828c0950 | 217 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
218 | .open = nfsd_pool_stats_open, |
219 | .read = seq_read, | |
220 | .llseek = seq_lseek, | |
ed2d8aed | 221 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
222 | }; |
223 | ||
7ba630f5 | 224 | static const struct file_operations reply_cache_stats_operations = { |
a2f999a3 JL |
225 | .open = nfsd_reply_cache_stats_open, |
226 | .read = seq_read, | |
227 | .llseek = seq_lseek, | |
228 | .release = single_release, | |
229 | }; | |
230 | ||
1da177e4 LT |
231 | /*----------------------------------------------------------------------------*/ |
232 | /* | |
233 | * payload - write methods | |
1da177e4 LT |
234 | */ |
235 | ||
244c7d44 AV |
236 | static inline struct net *netns(struct file *file) |
237 | { | |
238 | return file_inode(file)->i_sb->s_fs_info; | |
239 | } | |
1da177e4 | 240 | |
262a0982 CL |
241 | /** |
242 | * write_unlock_ip - Release all locks used by a client | |
243 | * | |
244 | * Experimental. | |
245 | * | |
246 | * Input: | |
247 | * buf: '\n'-terminated C string containing a | |
4116092b | 248 | * presentation format IP address |
262a0982 CL |
249 | * size: length of C string in @buf |
250 | * Output: | |
251 | * On success: returns zero if all specified locks were released; | |
252 | * returns one if one or more locks were not released | |
253 | * On error: return code is negative errno value | |
262a0982 | 254 | */ |
b046ccdc | 255 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 256 | { |
4116092b CL |
257 | struct sockaddr_storage address; |
258 | struct sockaddr *sap = (struct sockaddr *)&address; | |
259 | size_t salen = sizeof(address); | |
367c8c7b | 260 | char *fo_path; |
244c7d44 | 261 | struct net *net = netns(file); |
4373ea84 WC |
262 | |
263 | /* sanity check */ | |
264 | if (size == 0) | |
265 | return -EINVAL; | |
266 | ||
267 | if (buf[size-1] != '\n') | |
268 | return -EINVAL; | |
269 | ||
270 | fo_path = buf; | |
271 | if (qword_get(&buf, fo_path, size) < 0) | |
272 | return -EINVAL; | |
273 | ||
11f77942 | 274 | if (rpc_pton(net, fo_path, size, sap, salen) == 0) |
4373ea84 | 275 | return -EINVAL; |
4373ea84 | 276 | |
4116092b | 277 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
278 | } |
279 | ||
262a0982 CL |
280 | /** |
281 | * write_unlock_fs - Release all locks on a local file system | |
282 | * | |
283 | * Experimental. | |
284 | * | |
285 | * Input: | |
286 | * buf: '\n'-terminated C string containing the | |
287 | * absolute pathname of a local file system | |
288 | * size: length of C string in @buf | |
289 | * Output: | |
290 | * On success: returns zero if all specified locks were released; | |
291 | * returns one if one or more locks were not released | |
292 | * On error: return code is negative errno value | |
293 | */ | |
b046ccdc | 294 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 295 | { |
a63bb996 | 296 | struct path path; |
17efa372 WC |
297 | char *fo_path; |
298 | int error; | |
299 | ||
300 | /* sanity check */ | |
301 | if (size == 0) | |
302 | return -EINVAL; | |
303 | ||
304 | if (buf[size-1] != '\n') | |
305 | return -EINVAL; | |
306 | ||
307 | fo_path = buf; | |
308 | if (qword_get(&buf, fo_path, size) < 0) | |
309 | return -EINVAL; | |
310 | ||
a63bb996 | 311 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
312 | if (error) |
313 | return error; | |
314 | ||
262a0982 CL |
315 | /* |
316 | * XXX: Needs better sanity checking. Otherwise we could end up | |
317 | * releasing locks on the wrong file system. | |
318 | * | |
319 | * For example: | |
320 | * 1. Does the path refer to a directory? | |
321 | * 2. Is that directory a mount point, or | |
322 | * 3. Is that directory the root of an exported file system? | |
323 | */ | |
d8c9584e | 324 | error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); |
17efa372 | 325 | |
a63bb996 | 326 | path_put(&path); |
17efa372 WC |
327 | return error; |
328 | } | |
329 | ||
262a0982 CL |
330 | /** |
331 | * write_filehandle - Get a variable-length NFS file handle by path | |
332 | * | |
333 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
334 | * three alphanumeric words separated by whitespace. The string may | |
335 | * contain escape sequences. | |
336 | * | |
337 | * Input: | |
338 | * buf: | |
339 | * domain: client domain name | |
340 | * path: export pathname | |
341 | * maxsize: numeric maximum size of | |
342 | * @buf | |
343 | * size: length of C string in @buf | |
344 | * Output: | |
345 | * On success: passed-in buffer filled with '\n'-terminated C | |
346 | * string containing a ASCII hex text version | |
347 | * of the NFS file handle; | |
348 | * return code is the size in bytes of the string | |
349 | * On error: return code is negative errno value | |
350 | */ | |
1da177e4 LT |
351 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
352 | { | |
1da177e4 | 353 | char *dname, *path; |
246d95ba | 354 | int uninitialized_var(maxsize); |
1da177e4 LT |
355 | char *mesg = buf; |
356 | int len; | |
357 | struct auth_domain *dom; | |
358 | struct knfsd_fh fh; | |
359 | ||
87d26ea7 BF |
360 | if (size == 0) |
361 | return -EINVAL; | |
362 | ||
1da177e4 LT |
363 | if (buf[size-1] != '\n') |
364 | return -EINVAL; | |
365 | buf[size-1] = 0; | |
366 | ||
367 | dname = mesg; | |
368 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
369 | if (len <= 0) |
370 | return -EINVAL; | |
1da177e4 LT |
371 | |
372 | path = dname+len+1; | |
373 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
374 | if (len <= 0) |
375 | return -EINVAL; | |
1da177e4 LT |
376 | |
377 | len = get_int(&mesg, &maxsize); | |
378 | if (len) | |
379 | return len; | |
380 | ||
381 | if (maxsize < NFS_FHSIZE) | |
382 | return -EINVAL; | |
3c7aa15d | 383 | maxsize = min(maxsize, NFS3_FHSIZE); |
1da177e4 LT |
384 | |
385 | if (qword_get(&mesg, mesg, size)>0) | |
386 | return -EINVAL; | |
387 | ||
388 | /* we have all the words, they are in buf.. */ | |
389 | dom = unix_domain_find(dname); | |
390 | if (!dom) | |
391 | return -ENOMEM; | |
392 | ||
244c7d44 | 393 | len = exp_rootfh(netns(file), dom, path, &fh, maxsize); |
1da177e4 LT |
394 | auth_domain_put(dom); |
395 | if (len) | |
396 | return len; | |
397 | ||
54224f04 CL |
398 | mesg = buf; |
399 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
400 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
401 | mesg[-1] = '\n'; | |
402 | return mesg - buf; | |
403 | } | |
404 | ||
262a0982 CL |
405 | /** |
406 | * write_threads - Start NFSD, or report the current number of running threads | |
407 | * | |
408 | * Input: | |
409 | * buf: ignored | |
410 | * size: zero | |
411 | * Output: | |
412 | * On success: passed-in buffer filled with '\n'-terminated C | |
413 | * string numeric value representing the number of | |
414 | * running NFSD threads; | |
415 | * return code is the size in bytes of the string | |
416 | * On error: return code is zero | |
417 | * | |
418 | * OR | |
419 | * | |
420 | * Input: | |
421 | * buf: C string containing an unsigned | |
422 | * integer value representing the | |
423 | * number of NFSD threads to start | |
424 | * size: non-zero length of C string in @buf | |
425 | * Output: | |
426 | * On success: NFS service is started; | |
427 | * passed-in buffer filled with '\n'-terminated C | |
428 | * string numeric value representing the number of | |
429 | * running NFSD threads; | |
430 | * return code is the size in bytes of the string | |
431 | * On error: return code is zero or a negative errno value | |
432 | */ | |
1da177e4 LT |
433 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
434 | { | |
1da177e4 LT |
435 | char *mesg = buf; |
436 | int rv; | |
244c7d44 | 437 | struct net *net = netns(file); |
d41a9417 | 438 | |
1da177e4 LT |
439 | if (size > 0) { |
440 | int newthreads; | |
441 | rv = get_int(&mesg, &newthreads); | |
442 | if (rv) | |
443 | return rv; | |
9e074856 | 444 | if (newthreads < 0) |
1da177e4 | 445 | return -EINVAL; |
4df493a2 | 446 | rv = nfsd_svc(newthreads, net, file->f_cred); |
82e12fe9 | 447 | if (rv < 0) |
1da177e4 | 448 | return rv; |
82e12fe9 | 449 | } else |
9dd9845f | 450 | rv = nfsd_nrthreads(net); |
e06b6405 | 451 | |
82e12fe9 | 452 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
453 | } |
454 | ||
262a0982 CL |
455 | /** |
456 | * write_pool_threads - Set or report the current number of threads per pool | |
457 | * | |
458 | * Input: | |
459 | * buf: ignored | |
460 | * size: zero | |
461 | * | |
462 | * OR | |
463 | * | |
464 | * Input: | |
465 | * buf: C string containing whitespace- | |
466 | * separated unsigned integer values | |
467 | * representing the number of NFSD | |
468 | * threads to start in each pool | |
469 | * size: non-zero length of C string in @buf | |
470 | * Output: | |
471 | * On success: passed-in buffer filled with '\n'-terminated C | |
472 | * string containing integer values representing the | |
473 | * number of NFSD threads in each pool; | |
474 | * return code is the size in bytes of the string | |
475 | * On error: return code is zero or a negative errno value | |
476 | */ | |
eed2965a GB |
477 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
478 | { | |
479 | /* if size > 0, look for an array of number of threads per node | |
480 | * and apply them then write out number of threads per node as reply | |
481 | */ | |
482 | char *mesg = buf; | |
483 | int i; | |
484 | int rv; | |
485 | int len; | |
bedbdd8b | 486 | int npools; |
eed2965a | 487 | int *nthreads; |
244c7d44 | 488 | struct net *net = netns(file); |
eed2965a | 489 | |
bedbdd8b | 490 | mutex_lock(&nfsd_mutex); |
9dd9845f | 491 | npools = nfsd_nrpools(net); |
eed2965a GB |
492 | if (npools == 0) { |
493 | /* | |
494 | * NFS is shut down. The admin can start it by | |
495 | * writing to the threads file but NOT the pool_threads | |
496 | * file, sorry. Report zero threads. | |
497 | */ | |
bedbdd8b | 498 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
499 | strcpy(buf, "0\n"); |
500 | return strlen(buf); | |
501 | } | |
502 | ||
503 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 504 | rv = -ENOMEM; |
eed2965a | 505 | if (nthreads == NULL) |
bedbdd8b | 506 | goto out_free; |
eed2965a GB |
507 | |
508 | if (size > 0) { | |
509 | for (i = 0; i < npools; i++) { | |
510 | rv = get_int(&mesg, &nthreads[i]); | |
511 | if (rv == -ENOENT) | |
512 | break; /* fewer numbers than pools */ | |
513 | if (rv) | |
514 | goto out_free; /* syntax error */ | |
515 | rv = -EINVAL; | |
516 | if (nthreads[i] < 0) | |
517 | goto out_free; | |
518 | } | |
3938a0d5 | 519 | rv = nfsd_set_nrthreads(i, nthreads, net); |
eed2965a GB |
520 | if (rv) |
521 | goto out_free; | |
522 | } | |
523 | ||
9dd9845f | 524 | rv = nfsd_get_nrthreads(npools, nthreads, net); |
eed2965a GB |
525 | if (rv) |
526 | goto out_free; | |
527 | ||
528 | mesg = buf; | |
529 | size = SIMPLE_TRANSACTION_LIMIT; | |
530 | for (i = 0; i < npools && size > 0; i++) { | |
531 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
532 | len = strlen(mesg); | |
533 | size -= len; | |
534 | mesg += len; | |
535 | } | |
413d63d7 | 536 | rv = mesg - buf; |
eed2965a GB |
537 | out_free: |
538 | kfree(nthreads); | |
bedbdd8b | 539 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
540 | return rv; |
541 | } | |
542 | ||
ff7d1179 | 543 | static ssize_t |
e333f3bb TM |
544 | nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, |
545 | const char *sep, unsigned vers, int minor) | |
ff7d1179 | 546 | { |
abcb4dac | 547 | const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; |
e333f3bb | 548 | bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); |
ff7d1179 | 549 | |
abcb4dac | 550 | if (vers == 4 && minor >= 0 && |
e333f3bb | 551 | !nfsd_minorversion(nn, minor, NFSD_TEST)) |
ff7d1179 | 552 | supported = false; |
abcb4dac N |
553 | if (minor == 0 && supported) |
554 | /* | |
555 | * special case for backward compatability. | |
556 | * +4.0 is never reported, it is implied by | |
557 | * +4, unless -4.0 is present. | |
558 | */ | |
559 | return 0; | |
ff7d1179 TM |
560 | return snprintf(buf, remaining, format, sep, |
561 | supported ? '+' : '-', vers, minor); | |
562 | } | |
563 | ||
3dd98a3b | 564 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 565 | { |
70c3b76c | 566 | char *mesg = buf; |
8daf220a | 567 | char *vers, *minorp, sign; |
261758b5 | 568 | int len, num, remaining; |
70c3b76c N |
569 | ssize_t tlen = 0; |
570 | char *sep; | |
244c7d44 | 571 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
70c3b76c N |
572 | |
573 | if (size>0) { | |
9dd9845f | 574 | if (nn->nfsd_serv) |
6658d3a7 | 575 | /* Cannot change versions without updating |
9dd9845f | 576 | * nn->nfsd_serv->sv_xdrsize, and reallocing |
6658d3a7 N |
577 | * rq_argp and rq_resp |
578 | */ | |
70c3b76c N |
579 | return -EBUSY; |
580 | if (buf[size-1] != '\n') | |
581 | return -EINVAL; | |
582 | buf[size-1] = 0; | |
583 | ||
584 | vers = mesg; | |
585 | len = qword_get(&mesg, vers, size); | |
586 | if (len <= 0) return -EINVAL; | |
587 | do { | |
d3635ff0 | 588 | enum vers_op cmd; |
abcb4dac | 589 | unsigned minor; |
70c3b76c N |
590 | sign = *vers; |
591 | if (sign == '+' || sign == '-') | |
8daf220a | 592 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 593 | else |
8daf220a BH |
594 | num = simple_strtol(vers, &minorp, 0); |
595 | if (*minorp == '.') { | |
ff89be87 | 596 | if (num != 4) |
8daf220a | 597 | return -EINVAL; |
e35659f1 | 598 | if (kstrtouint(minorp+1, 0, &minor) < 0) |
8daf220a | 599 | return -EINVAL; |
abcb4dac N |
600 | } |
601 | ||
d3635ff0 | 602 | cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; |
70c3b76c N |
603 | switch(num) { |
604 | case 2: | |
605 | case 3: | |
e333f3bb | 606 | nfsd_vers(nn, num, cmd); |
70c3b76c | 607 | break; |
d3635ff0 | 608 | case 4: |
abcb4dac | 609 | if (*minorp == '.') { |
e333f3bb | 610 | if (nfsd_minorversion(nn, minor, cmd) < 0) |
abcb4dac | 611 | return -EINVAL; |
e333f3bb | 612 | } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { |
abcb4dac N |
613 | /* |
614 | * Either we have +4 and no minors are enabled, | |
615 | * or we have -4 and at least one minor is enabled. | |
616 | * In either case, propagate 'cmd' to all minors. | |
617 | */ | |
618 | minor = 0; | |
e333f3bb | 619 | while (nfsd_minorversion(nn, minor, cmd) >= 0) |
abcb4dac N |
620 | minor++; |
621 | } | |
622 | break; | |
70c3b76c N |
623 | default: |
624 | return -EINVAL; | |
625 | } | |
626 | vers += len + 1; | |
70c3b76c N |
627 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
628 | /* If all get turned off, turn them back on, as | |
629 | * having no versions is BAD | |
630 | */ | |
e333f3bb | 631 | nfsd_reset_versions(nn); |
70c3b76c | 632 | } |
261758b5 | 633 | |
70c3b76c N |
634 | /* Now write current state into reply buffer */ |
635 | len = 0; | |
636 | sep = ""; | |
261758b5 | 637 | remaining = SIMPLE_TRANSACTION_LIMIT; |
ff7d1179 | 638 | for (num=2 ; num <= 4 ; num++) { |
abcb4dac | 639 | int minor; |
e333f3bb | 640 | if (!nfsd_vers(nn, num, NFSD_AVAIL)) |
ff7d1179 | 641 | continue; |
abcb4dac N |
642 | |
643 | minor = -1; | |
ff7d1179 | 644 | do { |
e333f3bb | 645 | len = nfsd_print_version_support(nn, buf, remaining, |
ff7d1179 | 646 | sep, num, minor); |
818f2f57 | 647 | if (len >= remaining) |
ff7d1179 | 648 | goto out; |
261758b5 CL |
649 | remaining -= len; |
650 | buf += len; | |
651 | tlen += len; | |
ff7d1179 | 652 | minor++; |
abcb4dac N |
653 | if (len) |
654 | sep = " "; | |
ff7d1179 TM |
655 | } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); |
656 | } | |
657 | out: | |
261758b5 | 658 | len = snprintf(buf, remaining, "\n"); |
818f2f57 | 659 | if (len >= remaining) |
261758b5 CL |
660 | return -EINVAL; |
661 | return tlen + len; | |
70c3b76c N |
662 | } |
663 | ||
262a0982 CL |
664 | /** |
665 | * write_versions - Set or report the available NFS protocol versions | |
666 | * | |
667 | * Input: | |
668 | * buf: ignored | |
669 | * size: zero | |
670 | * Output: | |
671 | * On success: passed-in buffer filled with '\n'-terminated C | |
672 | * string containing positive or negative integer | |
673 | * values representing the current status of each | |
674 | * protocol version; | |
675 | * return code is the size in bytes of the string | |
676 | * On error: return code is zero or a negative errno value | |
677 | * | |
678 | * OR | |
679 | * | |
680 | * Input: | |
681 | * buf: C string containing whitespace- | |
682 | * separated positive or negative | |
683 | * integer values representing NFS | |
684 | * protocol versions to enable ("+n") | |
685 | * or disable ("-n") | |
686 | * size: non-zero length of C string in @buf | |
687 | * Output: | |
688 | * On success: status of zero or more protocol versions has | |
689 | * been updated; passed-in buffer filled with | |
690 | * '\n'-terminated C string containing positive | |
691 | * or negative integer values representing the | |
692 | * current status of each protocol version; | |
693 | * return code is the size in bytes of the string | |
694 | * On error: return code is zero or a negative errno value | |
695 | */ | |
3dd98a3b JL |
696 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
697 | { | |
698 | ssize_t rv; | |
699 | ||
700 | mutex_lock(&nfsd_mutex); | |
701 | rv = __write_versions(file, buf, size); | |
702 | mutex_unlock(&nfsd_mutex); | |
703 | return rv; | |
704 | } | |
705 | ||
0a5372d8 CL |
706 | /* |
707 | * Zero-length write. Return a list of NFSD's current listener | |
708 | * transports. | |
709 | */ | |
9dd9845f | 710 | static ssize_t __write_ports_names(char *buf, struct net *net) |
0a5372d8 | 711 | { |
9dd9845f SK |
712 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
713 | ||
714 | if (nn->nfsd_serv == NULL) | |
0a5372d8 | 715 | return 0; |
9dd9845f | 716 | return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
717 | } |
718 | ||
0b7c2f6f CL |
719 | /* |
720 | * A single 'fd' number was written, in which case it must be for | |
721 | * a socket of a supported family/protocol, and we use it as an | |
722 | * nfsd listener. | |
723 | */ | |
4df493a2 | 724 | static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) |
0b7c2f6f CL |
725 | { |
726 | char *mesg = buf; | |
727 | int fd, err; | |
9dd9845f | 728 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
0b7c2f6f CL |
729 | |
730 | err = get_int(&mesg, &fd); | |
731 | if (err != 0 || fd < 0) | |
732 | return -EINVAL; | |
733 | ||
30646394 SK |
734 | if (svc_alien_sock(net, fd)) { |
735 | printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); | |
736 | return -EINVAL; | |
737 | } | |
738 | ||
6777436b | 739 | err = nfsd_create_serv(net); |
0b7c2f6f CL |
740 | if (err != 0) |
741 | return err; | |
742 | ||
4df493a2 | 743 | err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); |
78a8d7c8 | 744 | if (err < 0) { |
19f7e2ca | 745 | nfsd_destroy(net); |
78a8d7c8 JL |
746 | return err; |
747 | } | |
0b7c2f6f | 748 | |
ea068bad | 749 | /* Decrease the count, but don't shut down the service */ |
9dd9845f | 750 | nn->nfsd_serv->sv_nrthreads--; |
ea068bad | 751 | return err; |
0b7c2f6f CL |
752 | } |
753 | ||
4eb68c26 CL |
754 | /* |
755 | * A transport listener is added by writing it's transport name and | |
756 | * a port number. | |
757 | */ | |
4df493a2 | 758 | static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) |
4eb68c26 CL |
759 | { |
760 | char transport[16]; | |
37498292 | 761 | struct svc_xprt *xprt; |
4eb68c26 | 762 | int port, err; |
9dd9845f | 763 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
4eb68c26 | 764 | |
a10fded1 | 765 | if (sscanf(buf, "%15s %5u", transport, &port) != 2) |
4eb68c26 CL |
766 | return -EINVAL; |
767 | ||
4be929be | 768 | if (port < 1 || port > USHRT_MAX) |
4eb68c26 CL |
769 | return -EINVAL; |
770 | ||
6777436b | 771 | err = nfsd_create_serv(net); |
4eb68c26 CL |
772 | if (err != 0) |
773 | return err; | |
774 | ||
9dd9845f | 775 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
4df493a2 | 776 | PF_INET, port, SVC_SOCK_ANONYMOUS, cred); |
68717908 | 777 | if (err < 0) |
37498292 CL |
778 | goto out_err; |
779 | ||
9dd9845f | 780 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
4df493a2 | 781 | PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); |
37498292 CL |
782 | if (err < 0 && err != -EAFNOSUPPORT) |
783 | goto out_close; | |
0cd14a06 JL |
784 | |
785 | /* Decrease the count, but don't shut down the service */ | |
9dd9845f | 786 | nn->nfsd_serv->sv_nrthreads--; |
4eb68c26 | 787 | return 0; |
37498292 | 788 | out_close: |
9dd9845f | 789 | xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); |
37498292 CL |
790 | if (xprt != NULL) { |
791 | svc_close_xprt(xprt); | |
792 | svc_xprt_put(xprt); | |
793 | } | |
794 | out_err: | |
19f7e2ca | 795 | nfsd_destroy(net); |
37498292 | 796 | return err; |
4eb68c26 CL |
797 | } |
798 | ||
08160352 SK |
799 | static ssize_t __write_ports(struct file *file, char *buf, size_t size, |
800 | struct net *net) | |
80212d59 | 801 | { |
0a5372d8 | 802 | if (size == 0) |
9dd9845f | 803 | return __write_ports_names(buf, net); |
0b7c2f6f CL |
804 | |
805 | if (isdigit(buf[0])) | |
4df493a2 | 806 | return __write_ports_addfd(buf, net, file->f_cred); |
82d56591 | 807 | |
4eb68c26 | 808 | if (isalpha(buf[0])) |
4df493a2 | 809 | return __write_ports_addxprt(buf, net, file->f_cred); |
4cd5dc75 | 810 | |
b41b66d6 | 811 | return -EINVAL; |
80212d59 N |
812 | } |
813 | ||
262a0982 CL |
814 | /** |
815 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
816 | * | |
817 | * Input: | |
818 | * buf: ignored | |
819 | * size: zero | |
820 | * Output: | |
821 | * On success: passed-in buffer filled with a '\n'-terminated C | |
822 | * string containing a whitespace-separated list of | |
823 | * named NFSD listeners; | |
824 | * return code is the size in bytes of the string | |
825 | * On error: return code is zero or a negative errno value | |
826 | * | |
827 | * OR | |
828 | * | |
829 | * Input: | |
830 | * buf: C string containing an unsigned | |
831 | * integer value representing a bound | |
832 | * but unconnected socket that is to be | |
c71206a7 CL |
833 | * used as an NFSD listener; listen(3) |
834 | * must be called for a SOCK_STREAM | |
835 | * socket, otherwise it is ignored | |
262a0982 CL |
836 | * size: non-zero length of C string in @buf |
837 | * Output: | |
838 | * On success: NFS service is started; | |
839 | * passed-in buffer filled with a '\n'-terminated C | |
840 | * string containing a unique alphanumeric name of | |
841 | * the listener; | |
842 | * return code is the size in bytes of the string | |
843 | * On error: return code is a negative errno value | |
844 | * | |
845 | * OR | |
846 | * | |
847 | * Input: | |
262a0982 CL |
848 | * buf: C string containing a transport |
849 | * name and an unsigned integer value | |
850 | * representing the port to listen on, | |
851 | * separated by whitespace | |
852 | * size: non-zero length of C string in @buf | |
853 | * Output: | |
854 | * On success: returns zero; NFS service is started | |
855 | * On error: return code is a negative errno value | |
262a0982 | 856 | */ |
bedbdd8b NB |
857 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
858 | { | |
859 | ssize_t rv; | |
3dd98a3b | 860 | |
bedbdd8b | 861 | mutex_lock(&nfsd_mutex); |
244c7d44 | 862 | rv = __write_ports(file, buf, size, netns(file)); |
bedbdd8b NB |
863 | mutex_unlock(&nfsd_mutex); |
864 | return rv; | |
865 | } | |
866 | ||
867 | ||
596bbe53 N |
868 | int nfsd_max_blksize; |
869 | ||
262a0982 CL |
870 | /** |
871 | * write_maxblksize - Set or report the current NFS blksize | |
872 | * | |
873 | * Input: | |
874 | * buf: ignored | |
875 | * size: zero | |
876 | * | |
877 | * OR | |
878 | * | |
879 | * Input: | |
880 | * buf: C string containing an unsigned | |
881 | * integer value representing the new | |
882 | * NFS blksize | |
883 | * size: non-zero length of C string in @buf | |
884 | * Output: | |
885 | * On success: passed-in buffer filled with '\n'-terminated C string | |
886 | * containing numeric value of the current NFS blksize | |
887 | * setting; | |
888 | * return code is the size in bytes of the string | |
889 | * On error: return code is zero or a negative errno value | |
890 | */ | |
596bbe53 N |
891 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
892 | { | |
893 | char *mesg = buf; | |
244c7d44 | 894 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 895 | |
596bbe53 N |
896 | if (size > 0) { |
897 | int bsize; | |
898 | int rv = get_int(&mesg, &bsize); | |
899 | if (rv) | |
900 | return rv; | |
901 | /* force bsize into allowed range and | |
902 | * required alignment. | |
903 | */ | |
3c7aa15d KM |
904 | bsize = max_t(int, bsize, 1024); |
905 | bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); | |
596bbe53 | 906 | bsize &= ~(1024-1); |
bedbdd8b | 907 | mutex_lock(&nfsd_mutex); |
9dd9845f | 908 | if (nn->nfsd_serv) { |
bedbdd8b | 909 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
910 | return -EBUSY; |
911 | } | |
912 | nfsd_max_blksize = bsize; | |
bedbdd8b | 913 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 914 | } |
e06b6405 CL |
915 | |
916 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
917 | nfsd_max_blksize); | |
596bbe53 N |
918 | } |
919 | ||
5b8db00b JL |
920 | /** |
921 | * write_maxconn - Set or report the current max number of connections | |
922 | * | |
923 | * Input: | |
924 | * buf: ignored | |
925 | * size: zero | |
926 | * OR | |
927 | * | |
928 | * Input: | |
929 | * buf: C string containing an unsigned | |
930 | * integer value representing the new | |
931 | * number of max connections | |
932 | * size: non-zero length of C string in @buf | |
933 | * Output: | |
934 | * On success: passed-in buffer filled with '\n'-terminated C string | |
935 | * containing numeric value of max_connections setting | |
936 | * for this net namespace; | |
937 | * return code is the size in bytes of the string | |
938 | * On error: return code is zero or a negative errno value | |
939 | */ | |
940 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size) | |
941 | { | |
942 | char *mesg = buf; | |
244c7d44 | 943 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
5b8db00b JL |
944 | unsigned int maxconn = nn->max_connections; |
945 | ||
946 | if (size > 0) { | |
947 | int rv = get_uint(&mesg, &maxconn); | |
948 | ||
949 | if (rv) | |
950 | return rv; | |
951 | nn->max_connections = maxconn; | |
952 | } | |
953 | ||
954 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); | |
955 | } | |
956 | ||
70c3b76c | 957 | #ifdef CONFIG_NFSD_V4 |
9dd9845f | 958 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, |
20b7d86f | 959 | time64_t *time, struct nfsd_net *nn) |
1da177e4 | 960 | { |
1da177e4 | 961 | char *mesg = buf; |
f0135740 | 962 | int rv, i; |
1da177e4 LT |
963 | |
964 | if (size > 0) { | |
9dd9845f | 965 | if (nn->nfsd_serv) |
3dd98a3b | 966 | return -EBUSY; |
f0135740 | 967 | rv = get_int(&mesg, &i); |
1da177e4 LT |
968 | if (rv) |
969 | return rv; | |
e7b184f1 BF |
970 | /* |
971 | * Some sanity checking. We don't have a reason for | |
972 | * these particular numbers, but problems with the | |
973 | * extremes are: | |
974 | * - Too short: the briefest network outage may | |
975 | * cause clients to lose all their locks. Also, | |
976 | * the frequent polling may be wasteful. | |
977 | * - Too long: do you really want reboot recovery | |
978 | * to take more than an hour? Or to make other | |
979 | * clients wait an hour before being able to | |
980 | * revoke a dead client's locks? | |
981 | */ | |
f0135740 | 982 | if (i < 10 || i > 3600) |
1da177e4 | 983 | return -EINVAL; |
f0135740 | 984 | *time = i; |
1da177e4 | 985 | } |
e06b6405 | 986 | |
20b7d86f | 987 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); |
f0135740 BF |
988 | } |
989 | ||
9dd9845f | 990 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, |
20b7d86f | 991 | time64_t *time, struct nfsd_net *nn) |
f0135740 BF |
992 | { |
993 | ssize_t rv; | |
994 | ||
995 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 996 | rv = __nfsd4_write_time(file, buf, size, time, nn); |
f0135740 BF |
997 | mutex_unlock(&nfsd_mutex); |
998 | return rv; | |
1da177e4 LT |
999 | } |
1000 | ||
262a0982 CL |
1001 | /** |
1002 | * write_leasetime - Set or report the current NFSv4 lease time | |
1003 | * | |
1004 | * Input: | |
1005 | * buf: ignored | |
1006 | * size: zero | |
1007 | * | |
1008 | * OR | |
1009 | * | |
1010 | * Input: | |
1011 | * buf: C string containing an unsigned | |
1012 | * integer value representing the new | |
1013 | * NFSv4 lease expiry time | |
1014 | * size: non-zero length of C string in @buf | |
1015 | * Output: | |
1016 | * On success: passed-in buffer filled with '\n'-terminated C | |
1017 | * string containing unsigned integer value of the | |
1018 | * current lease expiry time; | |
1019 | * return code is the size in bytes of the string | |
1020 | * On error: return code is zero or a negative errno value | |
1021 | */ | |
3dd98a3b JL |
1022 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1023 | { | |
244c7d44 | 1024 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 1025 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); |
3dd98a3b JL |
1026 | } |
1027 | ||
efc4bb4f BF |
1028 | /** |
1029 | * write_gracetime - Set or report current NFSv4 grace period time | |
1030 | * | |
1031 | * As above, but sets the time of the NFSv4 grace period. | |
1032 | * | |
1033 | * Note this should never be set to less than the *previous* | |
1034 | * lease-period time, but we don't try to enforce this. (In the common | |
1035 | * case (a new boot), we don't know what the previous lease time was | |
1036 | * anyway.) | |
1037 | */ | |
1038 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1039 | { | |
244c7d44 | 1040 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 1041 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); |
efc4bb4f BF |
1042 | } |
1043 | ||
9dd9845f SK |
1044 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, |
1045 | struct nfsd_net *nn) | |
0964a3d3 N |
1046 | { |
1047 | char *mesg = buf; | |
1048 | char *recdir; | |
1049 | int len, status; | |
1050 | ||
3dd98a3b | 1051 | if (size > 0) { |
9dd9845f | 1052 | if (nn->nfsd_serv) |
3dd98a3b JL |
1053 | return -EBUSY; |
1054 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1055 | return -EINVAL; | |
1056 | buf[size-1] = 0; | |
0964a3d3 | 1057 | |
3dd98a3b JL |
1058 | recdir = mesg; |
1059 | len = qword_get(&mesg, recdir, size); | |
1060 | if (len <= 0) | |
1061 | return -EINVAL; | |
0964a3d3 | 1062 | |
3dd98a3b | 1063 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1064 | if (status) |
1065 | return status; | |
3dd98a3b | 1066 | } |
3d72ab8f CL |
1067 | |
1068 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1069 | nfs4_recoverydir()); | |
0964a3d3 | 1070 | } |
3dd98a3b | 1071 | |
262a0982 CL |
1072 | /** |
1073 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1074 | * | |
1075 | * Input: | |
1076 | * buf: ignored | |
1077 | * size: zero | |
1078 | * | |
1079 | * OR | |
1080 | * | |
1081 | * Input: | |
1082 | * buf: C string containing the pathname | |
1083 | * of the directory on a local file | |
1084 | * system containing permanent NFSv4 | |
1085 | * recovery data | |
1086 | * size: non-zero length of C string in @buf | |
1087 | * Output: | |
1088 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1089 | * containing the current recovery pathname setting; | |
1090 | * return code is the size in bytes of the string | |
1091 | * On error: return code is zero or a negative errno value | |
1092 | */ | |
3dd98a3b JL |
1093 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1094 | { | |
1095 | ssize_t rv; | |
244c7d44 | 1096 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
3dd98a3b JL |
1097 | |
1098 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 1099 | rv = __write_recoverydir(file, buf, size, nn); |
3dd98a3b JL |
1100 | mutex_unlock(&nfsd_mutex); |
1101 | return rv; | |
1102 | } | |
1103 | ||
7f5ef2e9 JL |
1104 | /** |
1105 | * write_v4_end_grace - release grace period for nfsd's v4.x lock manager | |
1106 | * | |
1107 | * Input: | |
1108 | * buf: ignored | |
1109 | * size: zero | |
1110 | * OR | |
1111 | * | |
1112 | * Input: | |
1113 | * buf: any value | |
1114 | * size: non-zero length of C string in @buf | |
1115 | * Output: | |
1116 | * passed-in buffer filled with "Y" or "N" with a newline | |
1117 | * and NULL-terminated C string. This indicates whether | |
1118 | * the grace period has ended in the current net | |
1119 | * namespace. Return code is the size in bytes of the | |
1120 | * string. Writing a string that starts with 'Y', 'y', or | |
1121 | * '1' to the file will end the grace period for nfsd's v4 | |
1122 | * lock manager. | |
1123 | */ | |
1124 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) | |
1125 | { | |
244c7d44 | 1126 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
7f5ef2e9 JL |
1127 | |
1128 | if (size > 0) { | |
1129 | switch(buf[0]) { | |
1130 | case 'Y': | |
1131 | case 'y': | |
1132 | case '1': | |
dd838821 | 1133 | if (!nn->nfsd_serv) |
62a063b8 | 1134 | return -EBUSY; |
7f5ef2e9 JL |
1135 | nfsd4_end_grace(nn); |
1136 | break; | |
1137 | default: | |
1138 | return -EINVAL; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", | |
1143 | nn->grace_ended ? 'Y' : 'N'); | |
1144 | } | |
1145 | ||
70c3b76c | 1146 | #endif |
0964a3d3 | 1147 | |
1da177e4 LT |
1148 | /*----------------------------------------------------------------------------*/ |
1149 | /* | |
1150 | * populating the filesystem. | |
1151 | */ | |
1152 | ||
e8a79fb1 BF |
1153 | /* Basically copying rpc_get_inode. */ |
1154 | static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) | |
1155 | { | |
1156 | struct inode *inode = new_inode(sb); | |
1157 | if (!inode) | |
1158 | return NULL; | |
1159 | /* Following advice from simple_fill_super documentation: */ | |
1160 | inode->i_ino = iunique(sb, NFSD_MaxReserved); | |
1161 | inode->i_mode = mode; | |
1162 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); | |
1163 | switch (mode & S_IFMT) { | |
1164 | case S_IFDIR: | |
1165 | inode->i_fop = &simple_dir_operations; | |
1166 | inode->i_op = &simple_dir_inode_operations; | |
1167 | inc_nlink(inode); | |
1168 | default: | |
1169 | break; | |
1170 | } | |
1171 | return inode; | |
1172 | } | |
1173 | ||
bebd6997 | 1174 | static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) |
e8a79fb1 BF |
1175 | { |
1176 | struct inode *inode; | |
1177 | ||
1178 | inode = nfsd_get_inode(dir->i_sb, mode); | |
1179 | if (!inode) | |
1180 | return -ENOMEM; | |
bebd6997 BF |
1181 | if (ncl) { |
1182 | inode->i_private = ncl; | |
1183 | kref_get(&ncl->cl_ref); | |
1184 | } | |
e8a79fb1 BF |
1185 | d_add(dentry, inode); |
1186 | inc_nlink(dir); | |
1187 | fsnotify_mkdir(dir, dentry); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) | |
1192 | { | |
1193 | struct inode *dir = parent->d_inode; | |
1194 | struct dentry *dentry; | |
1195 | int ret = -ENOMEM; | |
1196 | ||
1197 | inode_lock(dir); | |
1198 | dentry = d_alloc_name(parent, name); | |
1199 | if (!dentry) | |
1200 | goto out_err; | |
bebd6997 | 1201 | ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); |
e8a79fb1 BF |
1202 | if (ret) |
1203 | goto out_err; | |
e8a79fb1 BF |
1204 | out: |
1205 | inode_unlock(dir); | |
1206 | return dentry; | |
1207 | out_err: | |
d6846bfb | 1208 | dput(dentry); |
e8a79fb1 BF |
1209 | dentry = ERR_PTR(ret); |
1210 | goto out; | |
1211 | } | |
1212 | ||
97ad4031 BF |
1213 | static void clear_ncl(struct inode *inode) |
1214 | { | |
1215 | struct nfsdfs_client *ncl = inode->i_private; | |
1216 | ||
1217 | inode->i_private = NULL; | |
97ad4031 BF |
1218 | kref_put(&ncl->cl_ref, ncl->cl_release); |
1219 | } | |
1220 | ||
b78fa45d | 1221 | static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) |
97ad4031 BF |
1222 | { |
1223 | struct nfsdfs_client *nc = inode->i_private; | |
1224 | ||
1225 | if (nc) | |
1226 | kref_get(&nc->cl_ref); | |
1227 | return nc; | |
1228 | } | |
1229 | ||
1230 | struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) | |
1231 | { | |
1232 | struct nfsdfs_client *nc; | |
1233 | ||
dc46bba7 | 1234 | inode_lock_shared(inode); |
97ad4031 | 1235 | nc = __get_nfsdfs_client(inode); |
dc46bba7 | 1236 | inode_unlock_shared(inode); |
97ad4031 BF |
1237 | return nc; |
1238 | } | |
1239 | /* from __rpc_unlink */ | |
1240 | static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) | |
1241 | { | |
1242 | int ret; | |
1243 | ||
1244 | clear_ncl(d_inode(dentry)); | |
1245 | dget(dentry); | |
1246 | ret = simple_unlink(dir, dentry); | |
1247 | d_delete(dentry); | |
1248 | dput(dentry); | |
1249 | WARN_ON_ONCE(ret); | |
1250 | } | |
1251 | ||
1252 | static void nfsdfs_remove_files(struct dentry *root) | |
1253 | { | |
1254 | struct dentry *dentry, *tmp; | |
1255 | ||
1256 | list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { | |
1257 | if (!simple_positive(dentry)) { | |
1258 | WARN_ON_ONCE(1); /* I think this can't happen? */ | |
1259 | continue; | |
1260 | } | |
1261 | nfsdfs_remove_file(d_inode(root), dentry); | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | /* XXX: cut'n'paste from simple_fill_super; figure out if we could share | |
1266 | * code instead. */ | |
1267 | static int nfsdfs_create_files(struct dentry *root, | |
1268 | const struct tree_descr *files) | |
1269 | { | |
1270 | struct inode *dir = d_inode(root); | |
1271 | struct inode *inode; | |
1272 | struct dentry *dentry; | |
1273 | int i; | |
1274 | ||
1275 | inode_lock(dir); | |
1276 | for (i = 0; files->name && files->name[0]; i++, files++) { | |
1277 | if (!files->name) | |
1278 | continue; | |
1279 | dentry = d_alloc_name(root, files->name); | |
1280 | if (!dentry) | |
1281 | goto out; | |
1282 | inode = nfsd_get_inode(d_inode(root)->i_sb, | |
1283 | S_IFREG | files->mode); | |
1284 | if (!inode) { | |
1285 | dput(dentry); | |
1286 | goto out; | |
1287 | } | |
1288 | inode->i_fop = files->ops; | |
1289 | inode->i_private = __get_nfsdfs_client(dir); | |
1290 | d_add(dentry, inode); | |
1291 | fsnotify_create(dir, dentry); | |
1292 | } | |
1293 | inode_unlock(dir); | |
1294 | return 0; | |
1295 | out: | |
1296 | nfsdfs_remove_files(root); | |
1297 | inode_unlock(dir); | |
1298 | return -ENOMEM; | |
1299 | } | |
1300 | ||
e8a79fb1 | 1301 | /* on success, returns positive number unique to that client. */ |
97ad4031 BF |
1302 | struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, |
1303 | struct nfsdfs_client *ncl, u32 id, | |
1304 | const struct tree_descr *files) | |
e8a79fb1 | 1305 | { |
97ad4031 | 1306 | struct dentry *dentry; |
e8a79fb1 | 1307 | char name[11]; |
97ad4031 | 1308 | int ret; |
e8a79fb1 | 1309 | |
bf5ed3e3 | 1310 | sprintf(name, "%u", id); |
e8a79fb1 | 1311 | |
97ad4031 BF |
1312 | dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); |
1313 | if (IS_ERR(dentry)) /* XXX: tossing errors? */ | |
1314 | return NULL; | |
1315 | ret = nfsdfs_create_files(dentry, files); | |
1316 | if (ret) { | |
1317 | nfsd_client_rmdir(dentry); | |
1318 | return NULL; | |
1319 | } | |
1320 | return dentry; | |
e8a79fb1 BF |
1321 | } |
1322 | ||
1323 | /* Taken from __rpc_rmdir: */ | |
1324 | void nfsd_client_rmdir(struct dentry *dentry) | |
1325 | { | |
1326 | struct inode *dir = d_inode(dentry->d_parent); | |
1327 | struct inode *inode = d_inode(dentry); | |
e8a79fb1 BF |
1328 | int ret; |
1329 | ||
97ad4031 BF |
1330 | inode_lock(dir); |
1331 | nfsdfs_remove_files(dentry); | |
1332 | clear_ncl(inode); | |
e8a79fb1 BF |
1333 | dget(dentry); |
1334 | ret = simple_rmdir(dir, dentry); | |
1335 | WARN_ON_ONCE(ret); | |
1336 | d_delete(dentry); | |
97ad4031 | 1337 | inode_unlock(dir); |
e8a79fb1 BF |
1338 | } |
1339 | ||
96a374a3 | 1340 | static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) |
1da177e4 | 1341 | { |
e8a79fb1 BF |
1342 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
1343 | nfsd_net_id); | |
1344 | struct dentry *dentry; | |
1345 | int ret; | |
1346 | ||
cda37124 | 1347 | static const struct tree_descr nfsd_files[] = { |
96d851c4 | 1348 | [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, |
e8e8753f BF |
1349 | [NFSD_Export_features] = {"export_features", |
1350 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1351 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1352 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1353 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1354 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1355 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1356 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1357 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1358 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
a2f999a3 | 1359 | [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, |
70c3b76c | 1360 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1361 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1362 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
5b8db00b | 1363 | [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, |
b084f598 | 1364 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 | 1365 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
b084f598 | 1366 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
1da177e4 LT |
1367 | #ifdef CONFIG_NFSD_V4 |
1368 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1369 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1370 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
7f5ef2e9 | 1371 | [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1372 | #endif |
1373 | /* last one */ {""} | |
1374 | }; | |
96a374a3 | 1375 | |
e8a79fb1 BF |
1376 | ret = simple_fill_super(sb, 0x6e667364, nfsd_files); |
1377 | if (ret) | |
1378 | return ret; | |
1379 | dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); | |
1380 | if (IS_ERR(dentry)) | |
1381 | return PTR_ERR(dentry); | |
1382 | nn->nfsd_client_dir = dentry; | |
1383 | return 0; | |
1da177e4 | 1384 | } |
e8a79fb1 | 1385 | |
96a374a3 DH |
1386 | static int nfsd_fs_get_tree(struct fs_context *fc) |
1387 | { | |
533770cc | 1388 | return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); |
1da177e4 LT |
1389 | } |
1390 | ||
96a374a3 | 1391 | static void nfsd_fs_free_fc(struct fs_context *fc) |
1da177e4 | 1392 | { |
96a374a3 DH |
1393 | if (fc->s_fs_info) |
1394 | put_net(fc->s_fs_info); | |
1395 | } | |
1396 | ||
1397 | static const struct fs_context_operations nfsd_fs_context_ops = { | |
1398 | .free = nfsd_fs_free_fc, | |
1399 | .get_tree = nfsd_fs_get_tree, | |
1400 | }; | |
1401 | ||
1402 | static int nfsd_init_fs_context(struct fs_context *fc) | |
1da177e4 | 1403 | { |
96a374a3 DH |
1404 | put_user_ns(fc->user_ns); |
1405 | fc->user_ns = get_user_ns(fc->net_ns->user_ns); | |
1406 | fc->ops = &nfsd_fs_context_ops; | |
1407 | return 0; | |
11f77942 SK |
1408 | } |
1409 | ||
1410 | static void nfsd_umount(struct super_block *sb) | |
1411 | { | |
1412 | struct net *net = sb->s_fs_info; | |
1413 | ||
1414 | kill_litter_super(sb); | |
1415 | put_net(net); | |
1da177e4 LT |
1416 | } |
1417 | ||
1418 | static struct file_system_type nfsd_fs_type = { | |
1419 | .owner = THIS_MODULE, | |
1420 | .name = "nfsd", | |
96a374a3 | 1421 | .init_fs_context = nfsd_init_fs_context, |
11f77942 | 1422 | .kill_sb = nfsd_umount, |
1da177e4 | 1423 | }; |
7f78e035 | 1424 | MODULE_ALIAS_FS("nfsd"); |
1da177e4 | 1425 | |
e331f606 BF |
1426 | #ifdef CONFIG_PROC_FS |
1427 | static int create_proc_exports_entry(void) | |
1428 | { | |
1429 | struct proc_dir_entry *entry; | |
1430 | ||
1431 | entry = proc_mkdir("fs/nfs", NULL); | |
1432 | if (!entry) | |
1433 | return -ENOMEM; | |
97a32539 | 1434 | entry = proc_create("exports", 0, entry, &exports_proc_ops); |
ff7c4b36 | 1435 | if (!entry) { |
1436 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1437 | return -ENOMEM; |
ff7c4b36 | 1438 | } |
e331f606 BF |
1439 | return 0; |
1440 | } | |
1441 | #else /* CONFIG_PROC_FS */ | |
1442 | static int create_proc_exports_entry(void) | |
1443 | { | |
1444 | return 0; | |
1445 | } | |
1446 | #endif | |
1447 | ||
c7d03a00 | 1448 | unsigned int nfsd_net_id; |
5717e012 SK |
1449 | |
1450 | static __net_init int nfsd_init_net(struct net *net) | |
1451 | { | |
1452 | int retval; | |
2c830dd7 | 1453 | struct vfsmount *mnt; |
3d733711 | 1454 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5717e012 SK |
1455 | |
1456 | retval = nfsd_export_init(net); | |
1457 | if (retval) | |
1458 | goto out_export_error; | |
f69adb2f SK |
1459 | retval = nfsd_idmap_init(net); |
1460 | if (retval) | |
1461 | goto out_idmap_error; | |
e333f3bb TM |
1462 | nn->nfsd_versions = NULL; |
1463 | nn->nfsd4_minorversions = NULL; | |
3ba75830 BF |
1464 | retval = nfsd_reply_cache_init(nn); |
1465 | if (retval) | |
1466 | goto out_drc_error; | |
3bf6b57e BF |
1467 | nn->nfsd4_lease = 90; /* default lease time */ |
1468 | nn->nfsd4_grace = 90; | |
03f318ca | 1469 | nn->somebody_reclaimed = false; |
362063a5 | 1470 | nn->track_reclaim_completes = false; |
ebd7c72c | 1471 | nn->clverifier_counter = prandom_u32(); |
bf5ed3e3 BF |
1472 | nn->clientid_base = prandom_u32(); |
1473 | nn->clientid_counter = nn->clientid_base + 1; | |
e0639dc5 | 1474 | nn->s2s_cp_cl_id = nn->clientid_counter++; |
2317dc55 VA |
1475 | |
1476 | atomic_set(&nn->ntf_refcnt, 0); | |
1477 | init_waitqueue_head(&nn->ntf_wq); | |
27c438f5 | 1478 | seqlock_init(&nn->boot_lock); |
2c830dd7 BF |
1479 | |
1480 | mnt = vfs_kern_mount(&nfsd_fs_type, SB_KERNMOUNT, "nfsd", NULL); | |
1481 | if (IS_ERR(mnt)) { | |
1482 | retval = PTR_ERR(mnt); | |
1483 | goto out_mount_err; | |
1484 | } | |
1485 | nn->nfsd_mnt = mnt; | |
5717e012 SK |
1486 | return 0; |
1487 | ||
2c830dd7 BF |
1488 | out_mount_err: |
1489 | nfsd_reply_cache_shutdown(nn); | |
3ba75830 BF |
1490 | out_drc_error: |
1491 | nfsd_idmap_shutdown(net); | |
f69adb2f SK |
1492 | out_idmap_error: |
1493 | nfsd_export_shutdown(net); | |
5717e012 SK |
1494 | out_export_error: |
1495 | return retval; | |
1496 | } | |
1497 | ||
1498 | static __net_exit void nfsd_exit_net(struct net *net) | |
1499 | { | |
3ba75830 BF |
1500 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1501 | ||
2c830dd7 | 1502 | mntput(nn->nfsd_mnt); |
3ba75830 | 1503 | nfsd_reply_cache_shutdown(nn); |
f69adb2f | 1504 | nfsd_idmap_shutdown(net); |
5717e012 | 1505 | nfsd_export_shutdown(net); |
e333f3bb | 1506 | nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); |
5717e012 SK |
1507 | } |
1508 | ||
7ea34ac1 | 1509 | static struct pernet_operations nfsd_net_ops = { |
5717e012 SK |
1510 | .init = nfsd_init_net, |
1511 | .exit = nfsd_exit_net, | |
7ea34ac1 JL |
1512 | .id = &nfsd_net_id, |
1513 | .size = sizeof(struct nfsd_net), | |
1514 | }; | |
1515 | ||
1da177e4 LT |
1516 | static int __init init_nfsd(void) |
1517 | { | |
1518 | int retval; | |
1519 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1520 | ||
7ea34ac1 JL |
1521 | retval = register_pernet_subsys(&nfsd_net_ops); |
1522 | if (retval < 0) | |
bb7ffbf2 GC |
1523 | return retval; |
1524 | retval = register_cld_notifier(); | |
e8ff2a84 | 1525 | if (retval) |
7ea34ac1 | 1526 | goto out_unregister_pernet; |
bb7ffbf2 GC |
1527 | retval = nfsd4_init_slabs(); |
1528 | if (retval) | |
1529 | goto out_unregister_notifier; | |
9cf514cc | 1530 | retval = nfsd4_init_pnfs(); |
65178db4 BS |
1531 | if (retval) |
1532 | goto out_free_slabs; | |
15b6ff95 | 1533 | nfsd_fault_inject_init(); /* nfsd fault injection controls */ |
1da177e4 | 1534 | nfsd_stat_init(); /* Statistics */ |
1da177e4 | 1535 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
e331f606 BF |
1536 | retval = create_proc_exports_entry(); |
1537 | if (retval) | |
f69adb2f | 1538 | goto out_free_lockd; |
1da177e4 | 1539 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1540 | if (retval) |
1541 | goto out_free_all; | |
1542 | return 0; | |
1543 | out_free_all: | |
26808d3f BF |
1544 | remove_proc_entry("fs/nfs/exports", NULL); |
1545 | remove_proc_entry("fs/nfs", NULL); | |
dbf847ec | 1546 | out_free_lockd: |
26808d3f | 1547 | nfsd_lockd_shutdown(); |
d5c3428b | 1548 | nfsd_stat_shutdown(); |
65178db4 | 1549 | nfsd_fault_inject_cleanup(); |
9cf514cc | 1550 | nfsd4_exit_pnfs(); |
65178db4 | 1551 | out_free_slabs: |
26808d3f | 1552 | nfsd4_free_slabs(); |
813fd320 | 1553 | out_unregister_notifier: |
797a9d79 | 1554 | unregister_cld_notifier(); |
bb7ffbf2 GC |
1555 | out_unregister_pernet: |
1556 | unregister_pernet_subsys(&nfsd_net_ops); | |
1da177e4 LT |
1557 | return retval; |
1558 | } | |
1559 | ||
1560 | static void __exit exit_nfsd(void) | |
1561 | { | |
1da177e4 LT |
1562 | remove_proc_entry("fs/nfs/exports", NULL); |
1563 | remove_proc_entry("fs/nfs", NULL); | |
1564 | nfsd_stat_shutdown(); | |
1565 | nfsd_lockd_shutdown(); | |
e8ff2a84 | 1566 | nfsd4_free_slabs(); |
9cf514cc | 1567 | nfsd4_exit_pnfs(); |
65178db4 | 1568 | nfsd_fault_inject_cleanup(); |
1da177e4 | 1569 | unregister_filesystem(&nfsd_fs_type); |
797a9d79 | 1570 | unregister_cld_notifier(); |
bb7ffbf2 | 1571 | unregister_pernet_subsys(&nfsd_net_ops); |
1da177e4 LT |
1572 | } |
1573 | ||
1574 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1575 | MODULE_LICENSE("GPL"); | |
1576 | module_init(init_nfsd) | |
1577 | module_exit(exit_nfsd) |