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, |
20ad856e | 35 | NFSD_Export_Stats, |
e8e8753f | 36 | NFSD_Export_features, |
1da177e4 | 37 | NFSD_Fh, |
4373ea84 | 38 | NFSD_FO_UnlockIP, |
17efa372 | 39 | NFSD_FO_UnlockFS, |
1da177e4 | 40 | NFSD_Threads, |
eed2965a | 41 | NFSD_Pool_Threads, |
03cf6c9f | 42 | NFSD_Pool_Stats, |
a2f999a3 | 43 | NFSD_Reply_Cache_Stats, |
70c3b76c | 44 | NFSD_Versions, |
80212d59 | 45 | NFSD_Ports, |
596bbe53 | 46 | NFSD_MaxBlkSize, |
5b8db00b | 47 | NFSD_MaxConnections, |
b0b0c0a2 | 48 | NFSD_SupportedEnctypes, |
70c3b76c N |
49 | /* |
50 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
51 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
52 | */ | |
53 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 54 | NFSD_Leasetime, |
efc4bb4f | 55 | NFSD_Gracetime, |
0964a3d3 | 56 | NFSD_RecoveryDir, |
7f5ef2e9 | 57 | NFSD_V4EndGrace, |
70c3b76c | 58 | #endif |
e8a79fb1 | 59 | NFSD_MaxReserved |
1da177e4 LT |
60 | }; |
61 | ||
62 | /* | |
63 | * write() for these nodes. | |
64 | */ | |
1da177e4 | 65 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
66 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
67 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 68 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 69 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 70 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 71 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 72 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
5b8db00b | 73 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size); |
70c3b76c | 74 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 75 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 76 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 77 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
7f5ef2e9 | 78 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); |
70c3b76c | 79 | #endif |
1da177e4 | 80 | |
c2cdc2ab | 81 | static ssize_t (*const write_op[])(struct file *, char *, size_t) = { |
1da177e4 | 82 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
83 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
84 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 85 | [NFSD_Threads] = write_threads, |
eed2965a | 86 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 87 | [NFSD_Versions] = write_versions, |
80212d59 | 88 | [NFSD_Ports] = write_ports, |
596bbe53 | 89 | [NFSD_MaxBlkSize] = write_maxblksize, |
5b8db00b | 90 | [NFSD_MaxConnections] = write_maxconn, |
70c3b76c | 91 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 92 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 93 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 94 | [NFSD_RecoveryDir] = write_recoverydir, |
7f5ef2e9 | 95 | [NFSD_V4EndGrace] = write_v4_end_grace, |
70c3b76c | 96 | #endif |
1da177e4 LT |
97 | }; |
98 | ||
99 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
100 | { | |
496ad9aa | 101 | ino_t ino = file_inode(file)->i_ino; |
1da177e4 LT |
102 | char *data; |
103 | ssize_t rv; | |
104 | ||
e8c96f8c | 105 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
106 | return -EINVAL; |
107 | ||
108 | data = simple_transaction_get(file, buf, size); | |
109 | if (IS_ERR(data)) | |
110 | return PTR_ERR(data); | |
111 | ||
112 | rv = write_op[ino](file, data, size); | |
8971a101 | 113 | if (rv >= 0) { |
1da177e4 LT |
114 | simple_transaction_set(file, rv); |
115 | rv = size; | |
116 | } | |
117 | return rv; | |
118 | } | |
119 | ||
7390022d N |
120 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
121 | { | |
122 | if (! file->private_data) { | |
123 | /* An attempt to read a transaction file without writing | |
124 | * causes a 0-byte write so that the file can return | |
125 | * state information | |
126 | */ | |
127 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
128 | if (rv < 0) | |
129 | return rv; | |
130 | } | |
131 | return simple_transaction_read(file, buf, size, pos); | |
132 | } | |
133 | ||
4b6f5d20 | 134 | static const struct file_operations transaction_ops = { |
1da177e4 | 135 | .write = nfsctl_transaction_write, |
7390022d | 136 | .read = nfsctl_transaction_read, |
1da177e4 | 137 | .release = simple_transaction_release, |
6038f373 | 138 | .llseek = default_llseek, |
1da177e4 LT |
139 | }; |
140 | ||
96d851c4 | 141 | static int exports_net_open(struct net *net, struct file *file) |
1da177e4 | 142 | { |
f2c7ea10 SK |
143 | int err; |
144 | struct seq_file *seq; | |
96d851c4 | 145 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
f2c7ea10 SK |
146 | |
147 | err = seq_open(file, &nfs_exports_op); | |
148 | if (err) | |
149 | return err; | |
150 | ||
151 | seq = file->private_data; | |
e5f06f72 | 152 | seq->private = nn->svc_export_cache; |
f2c7ea10 | 153 | return 0; |
1da177e4 LT |
154 | } |
155 | ||
96d851c4 SK |
156 | static int exports_proc_open(struct inode *inode, struct file *file) |
157 | { | |
158 | return exports_net_open(current->nsproxy->net_ns, file); | |
159 | } | |
160 | ||
97a32539 AD |
161 | static const struct proc_ops exports_proc_ops = { |
162 | .proc_open = exports_proc_open, | |
163 | .proc_read = seq_read, | |
164 | .proc_lseek = seq_lseek, | |
165 | .proc_release = seq_release, | |
96d851c4 SK |
166 | }; |
167 | ||
168 | static int exports_nfsd_open(struct inode *inode, struct file *file) | |
169 | { | |
170 | return exports_net_open(inode->i_sb->s_fs_info, file); | |
171 | } | |
172 | ||
173 | static const struct file_operations exports_nfsd_operations = { | |
174 | .open = exports_nfsd_open, | |
1da177e4 LT |
175 | .read = seq_read, |
176 | .llseek = seq_lseek, | |
177 | .release = seq_release, | |
178 | }; | |
179 | ||
e8e8753f BF |
180 | static int export_features_show(struct seq_file *m, void *v) |
181 | { | |
182 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static int export_features_open(struct inode *inode, struct file *file) | |
187 | { | |
188 | return single_open(file, export_features_show, NULL); | |
189 | } | |
190 | ||
75ef9de1 | 191 | static const struct file_operations export_features_operations = { |
e8e8753f BF |
192 | .open = export_features_open, |
193 | .read = seq_read, | |
194 | .llseek = seq_lseek, | |
195 | .release = single_release, | |
196 | }; | |
197 | ||
b084f598 | 198 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 KC |
199 | static int supported_enctypes_show(struct seq_file *m, void *v) |
200 | { | |
b084f598 | 201 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); |
b0b0c0a2 KC |
202 | return 0; |
203 | } | |
204 | ||
205 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
206 | { | |
207 | return single_open(file, supported_enctypes_show, NULL); | |
208 | } | |
209 | ||
75ef9de1 | 210 | static const struct file_operations supported_enctypes_ops = { |
b0b0c0a2 KC |
211 | .open = supported_enctypes_open, |
212 | .read = seq_read, | |
213 | .llseek = seq_lseek, | |
214 | .release = single_release, | |
215 | }; | |
b084f598 | 216 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
b0b0c0a2 | 217 | |
828c0950 | 218 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
219 | .open = nfsd_pool_stats_open, |
220 | .read = seq_read, | |
221 | .llseek = seq_lseek, | |
ed2d8aed | 222 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
223 | }; |
224 | ||
7ba630f5 | 225 | static const struct file_operations reply_cache_stats_operations = { |
a2f999a3 JL |
226 | .open = nfsd_reply_cache_stats_open, |
227 | .read = seq_read, | |
228 | .llseek = seq_lseek, | |
229 | .release = single_release, | |
230 | }; | |
231 | ||
1da177e4 LT |
232 | /*----------------------------------------------------------------------------*/ |
233 | /* | |
234 | * payload - write methods | |
1da177e4 LT |
235 | */ |
236 | ||
244c7d44 AV |
237 | static inline struct net *netns(struct file *file) |
238 | { | |
239 | return file_inode(file)->i_sb->s_fs_info; | |
240 | } | |
1da177e4 | 241 | |
f2453978 | 242 | /* |
262a0982 CL |
243 | * write_unlock_ip - Release all locks used by a client |
244 | * | |
245 | * Experimental. | |
246 | * | |
247 | * Input: | |
248 | * buf: '\n'-terminated C string containing a | |
4116092b | 249 | * presentation format IP address |
262a0982 CL |
250 | * size: length of C string in @buf |
251 | * Output: | |
252 | * On success: returns zero if all specified locks were released; | |
253 | * returns one if one or more locks were not released | |
254 | * On error: return code is negative errno value | |
262a0982 | 255 | */ |
b046ccdc | 256 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 257 | { |
4116092b CL |
258 | struct sockaddr_storage address; |
259 | struct sockaddr *sap = (struct sockaddr *)&address; | |
260 | size_t salen = sizeof(address); | |
367c8c7b | 261 | char *fo_path; |
244c7d44 | 262 | struct net *net = netns(file); |
4373ea84 WC |
263 | |
264 | /* sanity check */ | |
265 | if (size == 0) | |
266 | return -EINVAL; | |
267 | ||
268 | if (buf[size-1] != '\n') | |
269 | return -EINVAL; | |
270 | ||
271 | fo_path = buf; | |
272 | if (qword_get(&buf, fo_path, size) < 0) | |
273 | return -EINVAL; | |
274 | ||
11f77942 | 275 | if (rpc_pton(net, fo_path, size, sap, salen) == 0) |
4373ea84 | 276 | return -EINVAL; |
4373ea84 | 277 | |
4116092b | 278 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
279 | } |
280 | ||
f2453978 | 281 | /* |
262a0982 CL |
282 | * write_unlock_fs - Release all locks on a local file system |
283 | * | |
284 | * Experimental. | |
285 | * | |
286 | * Input: | |
287 | * buf: '\n'-terminated C string containing the | |
288 | * absolute pathname of a local file system | |
289 | * size: length of C string in @buf | |
290 | * Output: | |
291 | * On success: returns zero if all specified locks were released; | |
292 | * returns one if one or more locks were not released | |
293 | * On error: return code is negative errno value | |
294 | */ | |
b046ccdc | 295 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 296 | { |
a63bb996 | 297 | struct path path; |
17efa372 WC |
298 | char *fo_path; |
299 | int error; | |
300 | ||
301 | /* sanity check */ | |
302 | if (size == 0) | |
303 | return -EINVAL; | |
304 | ||
305 | if (buf[size-1] != '\n') | |
306 | return -EINVAL; | |
307 | ||
308 | fo_path = buf; | |
309 | if (qword_get(&buf, fo_path, size) < 0) | |
310 | return -EINVAL; | |
311 | ||
a63bb996 | 312 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
313 | if (error) |
314 | return error; | |
315 | ||
262a0982 CL |
316 | /* |
317 | * XXX: Needs better sanity checking. Otherwise we could end up | |
318 | * releasing locks on the wrong file system. | |
319 | * | |
320 | * For example: | |
321 | * 1. Does the path refer to a directory? | |
322 | * 2. Is that directory a mount point, or | |
323 | * 3. Is that directory the root of an exported file system? | |
324 | */ | |
d8c9584e | 325 | error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); |
17efa372 | 326 | |
a63bb996 | 327 | path_put(&path); |
17efa372 WC |
328 | return error; |
329 | } | |
330 | ||
f2453978 | 331 | /* |
262a0982 CL |
332 | * write_filehandle - Get a variable-length NFS file handle by path |
333 | * | |
334 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
335 | * three alphanumeric words separated by whitespace. The string may | |
336 | * contain escape sequences. | |
337 | * | |
338 | * Input: | |
339 | * buf: | |
340 | * domain: client domain name | |
341 | * path: export pathname | |
342 | * maxsize: numeric maximum size of | |
343 | * @buf | |
344 | * size: length of C string in @buf | |
345 | * Output: | |
346 | * On success: passed-in buffer filled with '\n'-terminated C | |
347 | * string containing a ASCII hex text version | |
348 | * of the NFS file handle; | |
349 | * return code is the size in bytes of the string | |
350 | * On error: return code is negative errno value | |
351 | */ | |
1da177e4 LT |
352 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
353 | { | |
1da177e4 | 354 | char *dname, *path; |
3f649ab7 | 355 | int maxsize; |
1da177e4 LT |
356 | char *mesg = buf; |
357 | int len; | |
358 | struct auth_domain *dom; | |
359 | struct knfsd_fh fh; | |
360 | ||
87d26ea7 BF |
361 | if (size == 0) |
362 | return -EINVAL; | |
363 | ||
1da177e4 LT |
364 | if (buf[size-1] != '\n') |
365 | return -EINVAL; | |
366 | buf[size-1] = 0; | |
367 | ||
368 | dname = mesg; | |
369 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
370 | if (len <= 0) |
371 | return -EINVAL; | |
1da177e4 LT |
372 | |
373 | path = dname+len+1; | |
374 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
375 | if (len <= 0) |
376 | return -EINVAL; | |
1da177e4 LT |
377 | |
378 | len = get_int(&mesg, &maxsize); | |
379 | if (len) | |
380 | return len; | |
381 | ||
382 | if (maxsize < NFS_FHSIZE) | |
383 | return -EINVAL; | |
3c7aa15d | 384 | maxsize = min(maxsize, NFS3_FHSIZE); |
1da177e4 LT |
385 | |
386 | if (qword_get(&mesg, mesg, size)>0) | |
387 | return -EINVAL; | |
388 | ||
389 | /* we have all the words, they are in buf.. */ | |
390 | dom = unix_domain_find(dname); | |
391 | if (!dom) | |
392 | return -ENOMEM; | |
393 | ||
244c7d44 | 394 | len = exp_rootfh(netns(file), dom, path, &fh, maxsize); |
1da177e4 LT |
395 | auth_domain_put(dom); |
396 | if (len) | |
397 | return len; | |
d8b26071 | 398 | |
54224f04 CL |
399 | mesg = buf; |
400 | len = SIMPLE_TRANSACTION_LIMIT; | |
d8b26071 | 401 | qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size); |
1da177e4 | 402 | mesg[-1] = '\n'; |
d8b26071 | 403 | return mesg - buf; |
1da177e4 LT |
404 | } |
405 | ||
f2453978 | 406 | /* |
262a0982 CL |
407 | * write_threads - Start NFSD, or report the current number of running threads |
408 | * | |
409 | * Input: | |
410 | * buf: ignored | |
411 | * size: zero | |
412 | * Output: | |
413 | * On success: passed-in buffer filled with '\n'-terminated C | |
414 | * string numeric value representing the number of | |
415 | * running NFSD threads; | |
416 | * return code is the size in bytes of the string | |
417 | * On error: return code is zero | |
418 | * | |
419 | * OR | |
420 | * | |
421 | * Input: | |
422 | * buf: C string containing an unsigned | |
423 | * integer value representing the | |
424 | * number of NFSD threads to start | |
425 | * size: non-zero length of C string in @buf | |
426 | * Output: | |
427 | * On success: NFS service is started; | |
428 | * passed-in buffer filled with '\n'-terminated C | |
429 | * string numeric value representing the number of | |
430 | * running NFSD threads; | |
431 | * return code is the size in bytes of the string | |
432 | * On error: return code is zero or a negative errno value | |
433 | */ | |
1da177e4 LT |
434 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
435 | { | |
1da177e4 LT |
436 | char *mesg = buf; |
437 | int rv; | |
244c7d44 | 438 | struct net *net = netns(file); |
d41a9417 | 439 | |
1da177e4 LT |
440 | if (size > 0) { |
441 | int newthreads; | |
442 | rv = get_int(&mesg, &newthreads); | |
443 | if (rv) | |
444 | return rv; | |
9e074856 | 445 | if (newthreads < 0) |
1da177e4 | 446 | return -EINVAL; |
4df493a2 | 447 | rv = nfsd_svc(newthreads, net, file->f_cred); |
82e12fe9 | 448 | if (rv < 0) |
1da177e4 | 449 | return rv; |
82e12fe9 | 450 | } else |
9dd9845f | 451 | rv = nfsd_nrthreads(net); |
e06b6405 | 452 | |
82e12fe9 | 453 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
454 | } |
455 | ||
f2453978 | 456 | /* |
262a0982 CL |
457 | * write_pool_threads - Set or report the current number of threads per pool |
458 | * | |
459 | * Input: | |
460 | * buf: ignored | |
461 | * size: zero | |
462 | * | |
463 | * OR | |
464 | * | |
465 | * Input: | |
466 | * buf: C string containing whitespace- | |
467 | * separated unsigned integer values | |
468 | * representing the number of NFSD | |
469 | * threads to start in each pool | |
470 | * size: non-zero length of C string in @buf | |
471 | * Output: | |
472 | * On success: passed-in buffer filled with '\n'-terminated C | |
473 | * string containing integer values representing the | |
474 | * number of NFSD threads in each pool; | |
475 | * return code is the size in bytes of the string | |
476 | * On error: return code is zero or a negative errno value | |
477 | */ | |
eed2965a GB |
478 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
479 | { | |
480 | /* if size > 0, look for an array of number of threads per node | |
481 | * and apply them then write out number of threads per node as reply | |
482 | */ | |
483 | char *mesg = buf; | |
484 | int i; | |
485 | int rv; | |
486 | int len; | |
bedbdd8b | 487 | int npools; |
eed2965a | 488 | int *nthreads; |
244c7d44 | 489 | struct net *net = netns(file); |
eed2965a | 490 | |
bedbdd8b | 491 | mutex_lock(&nfsd_mutex); |
9dd9845f | 492 | npools = nfsd_nrpools(net); |
eed2965a GB |
493 | if (npools == 0) { |
494 | /* | |
495 | * NFS is shut down. The admin can start it by | |
496 | * writing to the threads file but NOT the pool_threads | |
497 | * file, sorry. Report zero threads. | |
498 | */ | |
bedbdd8b | 499 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
500 | strcpy(buf, "0\n"); |
501 | return strlen(buf); | |
502 | } | |
503 | ||
504 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 505 | rv = -ENOMEM; |
eed2965a | 506 | if (nthreads == NULL) |
bedbdd8b | 507 | goto out_free; |
eed2965a GB |
508 | |
509 | if (size > 0) { | |
510 | for (i = 0; i < npools; i++) { | |
511 | rv = get_int(&mesg, &nthreads[i]); | |
512 | if (rv == -ENOENT) | |
513 | break; /* fewer numbers than pools */ | |
514 | if (rv) | |
515 | goto out_free; /* syntax error */ | |
516 | rv = -EINVAL; | |
517 | if (nthreads[i] < 0) | |
518 | goto out_free; | |
519 | } | |
3938a0d5 | 520 | rv = nfsd_set_nrthreads(i, nthreads, net); |
eed2965a GB |
521 | if (rv) |
522 | goto out_free; | |
523 | } | |
524 | ||
9dd9845f | 525 | rv = nfsd_get_nrthreads(npools, nthreads, net); |
eed2965a GB |
526 | if (rv) |
527 | goto out_free; | |
528 | ||
529 | mesg = buf; | |
530 | size = SIMPLE_TRANSACTION_LIMIT; | |
531 | for (i = 0; i < npools && size > 0; i++) { | |
532 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
533 | len = strlen(mesg); | |
534 | size -= len; | |
535 | mesg += len; | |
536 | } | |
413d63d7 | 537 | rv = mesg - buf; |
eed2965a GB |
538 | out_free: |
539 | kfree(nthreads); | |
bedbdd8b | 540 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
541 | return rv; |
542 | } | |
543 | ||
ff7d1179 | 544 | static ssize_t |
e333f3bb TM |
545 | nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, |
546 | const char *sep, unsigned vers, int minor) | |
ff7d1179 | 547 | { |
abcb4dac | 548 | const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; |
e333f3bb | 549 | bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); |
ff7d1179 | 550 | |
abcb4dac | 551 | if (vers == 4 && minor >= 0 && |
e333f3bb | 552 | !nfsd_minorversion(nn, minor, NFSD_TEST)) |
ff7d1179 | 553 | supported = false; |
abcb4dac N |
554 | if (minor == 0 && supported) |
555 | /* | |
556 | * special case for backward compatability. | |
557 | * +4.0 is never reported, it is implied by | |
558 | * +4, unless -4.0 is present. | |
559 | */ | |
560 | return 0; | |
ff7d1179 TM |
561 | return snprintf(buf, remaining, format, sep, |
562 | supported ? '+' : '-', vers, minor); | |
563 | } | |
564 | ||
3dd98a3b | 565 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 566 | { |
70c3b76c | 567 | char *mesg = buf; |
8daf220a | 568 | char *vers, *minorp, sign; |
261758b5 | 569 | int len, num, remaining; |
70c3b76c N |
570 | ssize_t tlen = 0; |
571 | char *sep; | |
244c7d44 | 572 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
70c3b76c N |
573 | |
574 | if (size>0) { | |
9dd9845f | 575 | if (nn->nfsd_serv) |
6658d3a7 | 576 | /* Cannot change versions without updating |
9dd9845f | 577 | * nn->nfsd_serv->sv_xdrsize, and reallocing |
6658d3a7 N |
578 | * rq_argp and rq_resp |
579 | */ | |
70c3b76c N |
580 | return -EBUSY; |
581 | if (buf[size-1] != '\n') | |
582 | return -EINVAL; | |
583 | buf[size-1] = 0; | |
584 | ||
585 | vers = mesg; | |
586 | len = qword_get(&mesg, vers, size); | |
587 | if (len <= 0) return -EINVAL; | |
588 | do { | |
d3635ff0 | 589 | enum vers_op cmd; |
abcb4dac | 590 | unsigned minor; |
70c3b76c N |
591 | sign = *vers; |
592 | if (sign == '+' || sign == '-') | |
8daf220a | 593 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 594 | else |
8daf220a BH |
595 | num = simple_strtol(vers, &minorp, 0); |
596 | if (*minorp == '.') { | |
ff89be87 | 597 | if (num != 4) |
8daf220a | 598 | return -EINVAL; |
e35659f1 | 599 | if (kstrtouint(minorp+1, 0, &minor) < 0) |
8daf220a | 600 | return -EINVAL; |
abcb4dac N |
601 | } |
602 | ||
d3635ff0 | 603 | cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; |
70c3b76c N |
604 | switch(num) { |
605 | case 2: | |
606 | case 3: | |
e333f3bb | 607 | nfsd_vers(nn, num, cmd); |
70c3b76c | 608 | break; |
d3635ff0 | 609 | case 4: |
abcb4dac | 610 | if (*minorp == '.') { |
e333f3bb | 611 | if (nfsd_minorversion(nn, minor, cmd) < 0) |
abcb4dac | 612 | return -EINVAL; |
e333f3bb | 613 | } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { |
abcb4dac N |
614 | /* |
615 | * Either we have +4 and no minors are enabled, | |
616 | * or we have -4 and at least one minor is enabled. | |
617 | * In either case, propagate 'cmd' to all minors. | |
618 | */ | |
619 | minor = 0; | |
e333f3bb | 620 | while (nfsd_minorversion(nn, minor, cmd) >= 0) |
abcb4dac N |
621 | minor++; |
622 | } | |
623 | break; | |
70c3b76c N |
624 | default: |
625 | return -EINVAL; | |
626 | } | |
627 | vers += len + 1; | |
70c3b76c N |
628 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
629 | /* If all get turned off, turn them back on, as | |
630 | * having no versions is BAD | |
631 | */ | |
e333f3bb | 632 | nfsd_reset_versions(nn); |
70c3b76c | 633 | } |
261758b5 | 634 | |
70c3b76c N |
635 | /* Now write current state into reply buffer */ |
636 | len = 0; | |
637 | sep = ""; | |
261758b5 | 638 | remaining = SIMPLE_TRANSACTION_LIMIT; |
ff7d1179 | 639 | for (num=2 ; num <= 4 ; num++) { |
abcb4dac | 640 | int minor; |
e333f3bb | 641 | if (!nfsd_vers(nn, num, NFSD_AVAIL)) |
ff7d1179 | 642 | continue; |
abcb4dac N |
643 | |
644 | minor = -1; | |
ff7d1179 | 645 | do { |
e333f3bb | 646 | len = nfsd_print_version_support(nn, buf, remaining, |
ff7d1179 | 647 | sep, num, minor); |
818f2f57 | 648 | if (len >= remaining) |
ff7d1179 | 649 | goto out; |
261758b5 CL |
650 | remaining -= len; |
651 | buf += len; | |
652 | tlen += len; | |
ff7d1179 | 653 | minor++; |
abcb4dac N |
654 | if (len) |
655 | sep = " "; | |
ff7d1179 TM |
656 | } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); |
657 | } | |
658 | out: | |
261758b5 | 659 | len = snprintf(buf, remaining, "\n"); |
818f2f57 | 660 | if (len >= remaining) |
261758b5 CL |
661 | return -EINVAL; |
662 | return tlen + len; | |
70c3b76c N |
663 | } |
664 | ||
f2453978 | 665 | /* |
262a0982 CL |
666 | * write_versions - Set or report the available NFS protocol versions |
667 | * | |
668 | * Input: | |
669 | * buf: ignored | |
670 | * size: zero | |
671 | * Output: | |
672 | * On success: passed-in buffer filled with '\n'-terminated C | |
673 | * string containing positive or negative integer | |
674 | * values representing the current status of each | |
675 | * protocol version; | |
676 | * return code is the size in bytes of the string | |
677 | * On error: return code is zero or a negative errno value | |
678 | * | |
679 | * OR | |
680 | * | |
681 | * Input: | |
682 | * buf: C string containing whitespace- | |
683 | * separated positive or negative | |
684 | * integer values representing NFS | |
685 | * protocol versions to enable ("+n") | |
686 | * or disable ("-n") | |
687 | * size: non-zero length of C string in @buf | |
688 | * Output: | |
689 | * On success: status of zero or more protocol versions has | |
690 | * been updated; passed-in buffer filled with | |
691 | * '\n'-terminated C string containing positive | |
692 | * or negative integer values representing the | |
693 | * current status of each protocol version; | |
694 | * return code is the size in bytes of the string | |
695 | * On error: return code is zero or a negative errno value | |
696 | */ | |
3dd98a3b JL |
697 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
698 | { | |
699 | ssize_t rv; | |
700 | ||
701 | mutex_lock(&nfsd_mutex); | |
702 | rv = __write_versions(file, buf, size); | |
703 | mutex_unlock(&nfsd_mutex); | |
704 | return rv; | |
705 | } | |
706 | ||
0a5372d8 CL |
707 | /* |
708 | * Zero-length write. Return a list of NFSD's current listener | |
709 | * transports. | |
710 | */ | |
9dd9845f | 711 | static ssize_t __write_ports_names(char *buf, struct net *net) |
0a5372d8 | 712 | { |
9dd9845f SK |
713 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
714 | ||
715 | if (nn->nfsd_serv == NULL) | |
0a5372d8 | 716 | return 0; |
9dd9845f | 717 | return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
718 | } |
719 | ||
0b7c2f6f CL |
720 | /* |
721 | * A single 'fd' number was written, in which case it must be for | |
722 | * a socket of a supported family/protocol, and we use it as an | |
723 | * nfsd listener. | |
724 | */ | |
4df493a2 | 725 | static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) |
0b7c2f6f CL |
726 | { |
727 | char *mesg = buf; | |
728 | int fd, err; | |
9dd9845f | 729 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
0b7c2f6f CL |
730 | |
731 | err = get_int(&mesg, &fd); | |
732 | if (err != 0 || fd < 0) | |
733 | return -EINVAL; | |
734 | ||
30646394 SK |
735 | if (svc_alien_sock(net, fd)) { |
736 | printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); | |
737 | return -EINVAL; | |
738 | } | |
739 | ||
6777436b | 740 | err = nfsd_create_serv(net); |
0b7c2f6f CL |
741 | if (err != 0) |
742 | return err; | |
743 | ||
4df493a2 | 744 | err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); |
0b7c2f6f | 745 | |
ec52361d N |
746 | if (err >= 0 && |
747 | !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) | |
748 | svc_get(nn->nfsd_serv); | |
749 | ||
750 | nfsd_put(net); | |
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 | 784 | |
ec52361d N |
785 | if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) |
786 | svc_get(nn->nfsd_serv); | |
787 | ||
788 | nfsd_put(net); | |
4eb68c26 | 789 | return 0; |
37498292 | 790 | out_close: |
9dd9845f | 791 | xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); |
37498292 CL |
792 | if (xprt != NULL) { |
793 | svc_close_xprt(xprt); | |
794 | svc_xprt_put(xprt); | |
795 | } | |
796 | out_err: | |
ec52361d | 797 | nfsd_put(net); |
37498292 | 798 | return err; |
4eb68c26 CL |
799 | } |
800 | ||
08160352 SK |
801 | static ssize_t __write_ports(struct file *file, char *buf, size_t size, |
802 | struct net *net) | |
80212d59 | 803 | { |
0a5372d8 | 804 | if (size == 0) |
9dd9845f | 805 | return __write_ports_names(buf, net); |
0b7c2f6f CL |
806 | |
807 | if (isdigit(buf[0])) | |
4df493a2 | 808 | return __write_ports_addfd(buf, net, file->f_cred); |
82d56591 | 809 | |
4eb68c26 | 810 | if (isalpha(buf[0])) |
4df493a2 | 811 | return __write_ports_addxprt(buf, net, file->f_cred); |
4cd5dc75 | 812 | |
b41b66d6 | 813 | return -EINVAL; |
80212d59 N |
814 | } |
815 | ||
f2453978 | 816 | /* |
262a0982 CL |
817 | * write_ports - Pass a socket file descriptor or transport name to listen on |
818 | * | |
819 | * Input: | |
820 | * buf: ignored | |
821 | * size: zero | |
822 | * Output: | |
823 | * On success: passed-in buffer filled with a '\n'-terminated C | |
824 | * string containing a whitespace-separated list of | |
825 | * named NFSD listeners; | |
826 | * return code is the size in bytes of the string | |
827 | * On error: return code is zero or a negative errno value | |
828 | * | |
829 | * OR | |
830 | * | |
831 | * Input: | |
832 | * buf: C string containing an unsigned | |
833 | * integer value representing a bound | |
834 | * but unconnected socket that is to be | |
c71206a7 CL |
835 | * used as an NFSD listener; listen(3) |
836 | * must be called for a SOCK_STREAM | |
837 | * socket, otherwise it is ignored | |
262a0982 CL |
838 | * size: non-zero length of C string in @buf |
839 | * Output: | |
840 | * On success: NFS service is started; | |
841 | * passed-in buffer filled with a '\n'-terminated C | |
842 | * string containing a unique alphanumeric name of | |
843 | * the listener; | |
844 | * return code is the size in bytes of the string | |
845 | * On error: return code is a negative errno value | |
846 | * | |
847 | * OR | |
848 | * | |
849 | * Input: | |
262a0982 CL |
850 | * buf: C string containing a transport |
851 | * name and an unsigned integer value | |
852 | * representing the port to listen on, | |
853 | * separated by whitespace | |
854 | * size: non-zero length of C string in @buf | |
855 | * Output: | |
856 | * On success: returns zero; NFS service is started | |
857 | * On error: return code is a negative errno value | |
262a0982 | 858 | */ |
bedbdd8b NB |
859 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
860 | { | |
861 | ssize_t rv; | |
3dd98a3b | 862 | |
bedbdd8b | 863 | mutex_lock(&nfsd_mutex); |
244c7d44 | 864 | rv = __write_ports(file, buf, size, netns(file)); |
bedbdd8b NB |
865 | mutex_unlock(&nfsd_mutex); |
866 | return rv; | |
867 | } | |
868 | ||
869 | ||
596bbe53 N |
870 | int nfsd_max_blksize; |
871 | ||
f2453978 | 872 | /* |
262a0982 CL |
873 | * write_maxblksize - Set or report the current NFS blksize |
874 | * | |
875 | * Input: | |
876 | * buf: ignored | |
877 | * size: zero | |
878 | * | |
879 | * OR | |
880 | * | |
881 | * Input: | |
882 | * buf: C string containing an unsigned | |
883 | * integer value representing the new | |
884 | * NFS blksize | |
885 | * size: non-zero length of C string in @buf | |
886 | * Output: | |
887 | * On success: passed-in buffer filled with '\n'-terminated C string | |
888 | * containing numeric value of the current NFS blksize | |
889 | * setting; | |
890 | * return code is the size in bytes of the string | |
891 | * On error: return code is zero or a negative errno value | |
892 | */ | |
596bbe53 N |
893 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
894 | { | |
895 | char *mesg = buf; | |
244c7d44 | 896 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 897 | |
596bbe53 N |
898 | if (size > 0) { |
899 | int bsize; | |
900 | int rv = get_int(&mesg, &bsize); | |
901 | if (rv) | |
902 | return rv; | |
903 | /* force bsize into allowed range and | |
904 | * required alignment. | |
905 | */ | |
3c7aa15d KM |
906 | bsize = max_t(int, bsize, 1024); |
907 | bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); | |
596bbe53 | 908 | bsize &= ~(1024-1); |
bedbdd8b | 909 | mutex_lock(&nfsd_mutex); |
9dd9845f | 910 | if (nn->nfsd_serv) { |
bedbdd8b | 911 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
912 | return -EBUSY; |
913 | } | |
914 | nfsd_max_blksize = bsize; | |
bedbdd8b | 915 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 916 | } |
e06b6405 CL |
917 | |
918 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
919 | nfsd_max_blksize); | |
596bbe53 N |
920 | } |
921 | ||
f2453978 | 922 | /* |
5b8db00b JL |
923 | * write_maxconn - Set or report the current max number of connections |
924 | * | |
925 | * Input: | |
926 | * buf: ignored | |
927 | * size: zero | |
928 | * OR | |
929 | * | |
930 | * Input: | |
931 | * buf: C string containing an unsigned | |
932 | * integer value representing the new | |
933 | * number of max connections | |
934 | * size: non-zero length of C string in @buf | |
935 | * Output: | |
936 | * On success: passed-in buffer filled with '\n'-terminated C string | |
937 | * containing numeric value of max_connections setting | |
938 | * for this net namespace; | |
939 | * return code is the size in bytes of the string | |
940 | * On error: return code is zero or a negative errno value | |
941 | */ | |
942 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size) | |
943 | { | |
944 | char *mesg = buf; | |
244c7d44 | 945 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
5b8db00b JL |
946 | unsigned int maxconn = nn->max_connections; |
947 | ||
948 | if (size > 0) { | |
949 | int rv = get_uint(&mesg, &maxconn); | |
950 | ||
951 | if (rv) | |
952 | return rv; | |
953 | nn->max_connections = maxconn; | |
954 | } | |
955 | ||
956 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); | |
957 | } | |
958 | ||
70c3b76c | 959 | #ifdef CONFIG_NFSD_V4 |
9dd9845f | 960 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, |
20b7d86f | 961 | time64_t *time, struct nfsd_net *nn) |
1da177e4 | 962 | { |
1da177e4 | 963 | char *mesg = buf; |
f0135740 | 964 | int rv, i; |
1da177e4 LT |
965 | |
966 | if (size > 0) { | |
9dd9845f | 967 | if (nn->nfsd_serv) |
3dd98a3b | 968 | return -EBUSY; |
f0135740 | 969 | rv = get_int(&mesg, &i); |
1da177e4 LT |
970 | if (rv) |
971 | return rv; | |
e7b184f1 BF |
972 | /* |
973 | * Some sanity checking. We don't have a reason for | |
974 | * these particular numbers, but problems with the | |
975 | * extremes are: | |
976 | * - Too short: the briefest network outage may | |
977 | * cause clients to lose all their locks. Also, | |
978 | * the frequent polling may be wasteful. | |
979 | * - Too long: do you really want reboot recovery | |
980 | * to take more than an hour? Or to make other | |
981 | * clients wait an hour before being able to | |
982 | * revoke a dead client's locks? | |
983 | */ | |
f0135740 | 984 | if (i < 10 || i > 3600) |
1da177e4 | 985 | return -EINVAL; |
f0135740 | 986 | *time = i; |
1da177e4 | 987 | } |
e06b6405 | 988 | |
20b7d86f | 989 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); |
f0135740 BF |
990 | } |
991 | ||
9dd9845f | 992 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, |
20b7d86f | 993 | time64_t *time, struct nfsd_net *nn) |
f0135740 BF |
994 | { |
995 | ssize_t rv; | |
996 | ||
997 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 998 | rv = __nfsd4_write_time(file, buf, size, time, nn); |
f0135740 BF |
999 | mutex_unlock(&nfsd_mutex); |
1000 | return rv; | |
1da177e4 LT |
1001 | } |
1002 | ||
f2453978 | 1003 | /* |
262a0982 CL |
1004 | * write_leasetime - Set or report the current NFSv4 lease time |
1005 | * | |
1006 | * Input: | |
1007 | * buf: ignored | |
1008 | * size: zero | |
1009 | * | |
1010 | * OR | |
1011 | * | |
1012 | * Input: | |
1013 | * buf: C string containing an unsigned | |
1014 | * integer value representing the new | |
1015 | * NFSv4 lease expiry time | |
1016 | * size: non-zero length of C string in @buf | |
1017 | * Output: | |
1018 | * On success: passed-in buffer filled with '\n'-terminated C | |
1019 | * string containing unsigned integer value of the | |
1020 | * current lease expiry time; | |
1021 | * return code is the size in bytes of the string | |
1022 | * On error: return code is zero or a negative errno value | |
1023 | */ | |
3dd98a3b JL |
1024 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1025 | { | |
244c7d44 | 1026 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 1027 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); |
3dd98a3b JL |
1028 | } |
1029 | ||
f2453978 | 1030 | /* |
efc4bb4f BF |
1031 | * write_gracetime - Set or report current NFSv4 grace period time |
1032 | * | |
1033 | * As above, but sets the time of the NFSv4 grace period. | |
1034 | * | |
1035 | * Note this should never be set to less than the *previous* | |
1036 | * lease-period time, but we don't try to enforce this. (In the common | |
1037 | * case (a new boot), we don't know what the previous lease time was | |
1038 | * anyway.) | |
1039 | */ | |
1040 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1041 | { | |
244c7d44 | 1042 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 1043 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); |
efc4bb4f BF |
1044 | } |
1045 | ||
9dd9845f SK |
1046 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, |
1047 | struct nfsd_net *nn) | |
0964a3d3 N |
1048 | { |
1049 | char *mesg = buf; | |
1050 | char *recdir; | |
1051 | int len, status; | |
1052 | ||
3dd98a3b | 1053 | if (size > 0) { |
9dd9845f | 1054 | if (nn->nfsd_serv) |
3dd98a3b JL |
1055 | return -EBUSY; |
1056 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1057 | return -EINVAL; | |
1058 | buf[size-1] = 0; | |
0964a3d3 | 1059 | |
3dd98a3b JL |
1060 | recdir = mesg; |
1061 | len = qword_get(&mesg, recdir, size); | |
1062 | if (len <= 0) | |
1063 | return -EINVAL; | |
0964a3d3 | 1064 | |
3dd98a3b | 1065 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1066 | if (status) |
1067 | return status; | |
3dd98a3b | 1068 | } |
3d72ab8f CL |
1069 | |
1070 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1071 | nfs4_recoverydir()); | |
0964a3d3 | 1072 | } |
3dd98a3b | 1073 | |
f2453978 | 1074 | /* |
262a0982 CL |
1075 | * write_recoverydir - Set or report the pathname of the recovery directory |
1076 | * | |
1077 | * Input: | |
1078 | * buf: ignored | |
1079 | * size: zero | |
1080 | * | |
1081 | * OR | |
1082 | * | |
1083 | * Input: | |
1084 | * buf: C string containing the pathname | |
1085 | * of the directory on a local file | |
1086 | * system containing permanent NFSv4 | |
1087 | * recovery data | |
1088 | * size: non-zero length of C string in @buf | |
1089 | * Output: | |
1090 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1091 | * containing the current recovery pathname setting; | |
1092 | * return code is the size in bytes of the string | |
1093 | * On error: return code is zero or a negative errno value | |
1094 | */ | |
3dd98a3b JL |
1095 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1096 | { | |
1097 | ssize_t rv; | |
244c7d44 | 1098 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
3dd98a3b JL |
1099 | |
1100 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 1101 | rv = __write_recoverydir(file, buf, size, nn); |
3dd98a3b JL |
1102 | mutex_unlock(&nfsd_mutex); |
1103 | return rv; | |
1104 | } | |
1105 | ||
f2453978 | 1106 | /* |
7f5ef2e9 JL |
1107 | * write_v4_end_grace - release grace period for nfsd's v4.x lock manager |
1108 | * | |
1109 | * Input: | |
1110 | * buf: ignored | |
1111 | * size: zero | |
1112 | * OR | |
1113 | * | |
1114 | * Input: | |
1115 | * buf: any value | |
1116 | * size: non-zero length of C string in @buf | |
1117 | * Output: | |
1118 | * passed-in buffer filled with "Y" or "N" with a newline | |
1119 | * and NULL-terminated C string. This indicates whether | |
1120 | * the grace period has ended in the current net | |
1121 | * namespace. Return code is the size in bytes of the | |
1122 | * string. Writing a string that starts with 'Y', 'y', or | |
1123 | * '1' to the file will end the grace period for nfsd's v4 | |
1124 | * lock manager. | |
1125 | */ | |
1126 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) | |
1127 | { | |
244c7d44 | 1128 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
7f5ef2e9 JL |
1129 | |
1130 | if (size > 0) { | |
1131 | switch(buf[0]) { | |
1132 | case 'Y': | |
1133 | case 'y': | |
1134 | case '1': | |
dd838821 | 1135 | if (!nn->nfsd_serv) |
62a063b8 | 1136 | return -EBUSY; |
7f5ef2e9 JL |
1137 | nfsd4_end_grace(nn); |
1138 | break; | |
1139 | default: | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", | |
1145 | nn->grace_ended ? 'Y' : 'N'); | |
1146 | } | |
1147 | ||
70c3b76c | 1148 | #endif |
0964a3d3 | 1149 | |
1da177e4 LT |
1150 | /*----------------------------------------------------------------------------*/ |
1151 | /* | |
1152 | * populating the filesystem. | |
1153 | */ | |
1154 | ||
e8a79fb1 BF |
1155 | /* Basically copying rpc_get_inode. */ |
1156 | static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) | |
1157 | { | |
1158 | struct inode *inode = new_inode(sb); | |
1159 | if (!inode) | |
1160 | return NULL; | |
1161 | /* Following advice from simple_fill_super documentation: */ | |
1162 | inode->i_ino = iunique(sb, NFSD_MaxReserved); | |
1163 | inode->i_mode = mode; | |
1164 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); | |
1165 | switch (mode & S_IFMT) { | |
1166 | case S_IFDIR: | |
1167 | inode->i_fop = &simple_dir_operations; | |
1168 | inode->i_op = &simple_dir_inode_operations; | |
1169 | inc_nlink(inode); | |
76c50eb7 | 1170 | break; |
e8a79fb1 BF |
1171 | default: |
1172 | break; | |
1173 | } | |
1174 | return inode; | |
1175 | } | |
1176 | ||
bebd6997 | 1177 | static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) |
e8a79fb1 BF |
1178 | { |
1179 | struct inode *inode; | |
1180 | ||
1181 | inode = nfsd_get_inode(dir->i_sb, mode); | |
1182 | if (!inode) | |
1183 | return -ENOMEM; | |
bebd6997 BF |
1184 | if (ncl) { |
1185 | inode->i_private = ncl; | |
1186 | kref_get(&ncl->cl_ref); | |
1187 | } | |
e8a79fb1 BF |
1188 | d_add(dentry, inode); |
1189 | inc_nlink(dir); | |
1190 | fsnotify_mkdir(dir, dentry); | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) | |
1195 | { | |
1196 | struct inode *dir = parent->d_inode; | |
1197 | struct dentry *dentry; | |
1198 | int ret = -ENOMEM; | |
1199 | ||
1200 | inode_lock(dir); | |
1201 | dentry = d_alloc_name(parent, name); | |
1202 | if (!dentry) | |
1203 | goto out_err; | |
bebd6997 | 1204 | ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); |
e8a79fb1 BF |
1205 | if (ret) |
1206 | goto out_err; | |
e8a79fb1 BF |
1207 | out: |
1208 | inode_unlock(dir); | |
1209 | return dentry; | |
1210 | out_err: | |
d6846bfb | 1211 | dput(dentry); |
e8a79fb1 BF |
1212 | dentry = ERR_PTR(ret); |
1213 | goto out; | |
1214 | } | |
1215 | ||
97ad4031 BF |
1216 | static void clear_ncl(struct inode *inode) |
1217 | { | |
1218 | struct nfsdfs_client *ncl = inode->i_private; | |
1219 | ||
1220 | inode->i_private = NULL; | |
97ad4031 BF |
1221 | kref_put(&ncl->cl_ref, ncl->cl_release); |
1222 | } | |
1223 | ||
b78fa45d | 1224 | static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) |
97ad4031 BF |
1225 | { |
1226 | struct nfsdfs_client *nc = inode->i_private; | |
1227 | ||
1228 | if (nc) | |
1229 | kref_get(&nc->cl_ref); | |
1230 | return nc; | |
1231 | } | |
1232 | ||
1233 | struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) | |
1234 | { | |
1235 | struct nfsdfs_client *nc; | |
1236 | ||
dc46bba7 | 1237 | inode_lock_shared(inode); |
97ad4031 | 1238 | nc = __get_nfsdfs_client(inode); |
dc46bba7 | 1239 | inode_unlock_shared(inode); |
97ad4031 BF |
1240 | return nc; |
1241 | } | |
1242 | /* from __rpc_unlink */ | |
1243 | static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) | |
1244 | { | |
1245 | int ret; | |
1246 | ||
1247 | clear_ncl(d_inode(dentry)); | |
1248 | dget(dentry); | |
1249 | ret = simple_unlink(dir, dentry); | |
29044dae AG |
1250 | d_drop(dentry); |
1251 | fsnotify_unlink(dir, dentry); | |
97ad4031 BF |
1252 | dput(dentry); |
1253 | WARN_ON_ONCE(ret); | |
1254 | } | |
1255 | ||
1256 | static void nfsdfs_remove_files(struct dentry *root) | |
1257 | { | |
1258 | struct dentry *dentry, *tmp; | |
1259 | ||
1260 | list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { | |
1261 | if (!simple_positive(dentry)) { | |
1262 | WARN_ON_ONCE(1); /* I think this can't happen? */ | |
1263 | continue; | |
1264 | } | |
1265 | nfsdfs_remove_file(d_inode(root), dentry); | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | /* XXX: cut'n'paste from simple_fill_super; figure out if we could share | |
1270 | * code instead. */ | |
1271 | static int nfsdfs_create_files(struct dentry *root, | |
472d155a N |
1272 | const struct tree_descr *files, |
1273 | struct dentry **fdentries) | |
97ad4031 BF |
1274 | { |
1275 | struct inode *dir = d_inode(root); | |
1276 | struct inode *inode; | |
1277 | struct dentry *dentry; | |
1278 | int i; | |
1279 | ||
1280 | inode_lock(dir); | |
1281 | for (i = 0; files->name && files->name[0]; i++, files++) { | |
97ad4031 BF |
1282 | dentry = d_alloc_name(root, files->name); |
1283 | if (!dentry) | |
1284 | goto out; | |
1285 | inode = nfsd_get_inode(d_inode(root)->i_sb, | |
1286 | S_IFREG | files->mode); | |
1287 | if (!inode) { | |
1288 | dput(dentry); | |
1289 | goto out; | |
1290 | } | |
1291 | inode->i_fop = files->ops; | |
1292 | inode->i_private = __get_nfsdfs_client(dir); | |
1293 | d_add(dentry, inode); | |
1294 | fsnotify_create(dir, dentry); | |
472d155a N |
1295 | if (fdentries) |
1296 | fdentries[i] = dentry; | |
97ad4031 BF |
1297 | } |
1298 | inode_unlock(dir); | |
1299 | return 0; | |
1300 | out: | |
1301 | nfsdfs_remove_files(root); | |
1302 | inode_unlock(dir); | |
1303 | return -ENOMEM; | |
1304 | } | |
1305 | ||
e8a79fb1 | 1306 | /* on success, returns positive number unique to that client. */ |
97ad4031 | 1307 | struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, |
472d155a N |
1308 | struct nfsdfs_client *ncl, u32 id, |
1309 | const struct tree_descr *files, | |
1310 | struct dentry **fdentries) | |
e8a79fb1 | 1311 | { |
97ad4031 | 1312 | struct dentry *dentry; |
e8a79fb1 | 1313 | char name[11]; |
97ad4031 | 1314 | int ret; |
e8a79fb1 | 1315 | |
bf5ed3e3 | 1316 | sprintf(name, "%u", id); |
e8a79fb1 | 1317 | |
97ad4031 BF |
1318 | dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); |
1319 | if (IS_ERR(dentry)) /* XXX: tossing errors? */ | |
1320 | return NULL; | |
472d155a | 1321 | ret = nfsdfs_create_files(dentry, files, fdentries); |
97ad4031 BF |
1322 | if (ret) { |
1323 | nfsd_client_rmdir(dentry); | |
1324 | return NULL; | |
1325 | } | |
1326 | return dentry; | |
e8a79fb1 BF |
1327 | } |
1328 | ||
1329 | /* Taken from __rpc_rmdir: */ | |
1330 | void nfsd_client_rmdir(struct dentry *dentry) | |
1331 | { | |
1332 | struct inode *dir = d_inode(dentry->d_parent); | |
1333 | struct inode *inode = d_inode(dentry); | |
e8a79fb1 BF |
1334 | int ret; |
1335 | ||
97ad4031 BF |
1336 | inode_lock(dir); |
1337 | nfsdfs_remove_files(dentry); | |
1338 | clear_ncl(inode); | |
e8a79fb1 BF |
1339 | dget(dentry); |
1340 | ret = simple_rmdir(dir, dentry); | |
1341 | WARN_ON_ONCE(ret); | |
29044dae | 1342 | d_drop(dentry); |
69afd267 | 1343 | fsnotify_rmdir(dir, dentry); |
bf265401 | 1344 | dput(dentry); |
97ad4031 | 1345 | inode_unlock(dir); |
e8a79fb1 BF |
1346 | } |
1347 | ||
96a374a3 | 1348 | static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) |
1da177e4 | 1349 | { |
e8a79fb1 BF |
1350 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
1351 | nfsd_net_id); | |
1352 | struct dentry *dentry; | |
1353 | int ret; | |
1354 | ||
cda37124 | 1355 | static const struct tree_descr nfsd_files[] = { |
96d851c4 | 1356 | [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, |
20ad856e AG |
1357 | /* Per-export io stats use same ops as exports file */ |
1358 | [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO}, | |
e8e8753f BF |
1359 | [NFSD_Export_features] = {"export_features", |
1360 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1361 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1362 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1363 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1364 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1365 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1366 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1367 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1368 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
a2f999a3 | 1369 | [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, |
70c3b76c | 1370 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1371 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1372 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
5b8db00b | 1373 | [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, |
b084f598 | 1374 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 | 1375 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
b084f598 | 1376 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
1da177e4 LT |
1377 | #ifdef CONFIG_NFSD_V4 |
1378 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1379 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1380 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
7f5ef2e9 | 1381 | [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1382 | #endif |
1383 | /* last one */ {""} | |
1384 | }; | |
96a374a3 | 1385 | |
e8a79fb1 BF |
1386 | ret = simple_fill_super(sb, 0x6e667364, nfsd_files); |
1387 | if (ret) | |
1388 | return ret; | |
1389 | dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); | |
1390 | if (IS_ERR(dentry)) | |
1391 | return PTR_ERR(dentry); | |
1392 | nn->nfsd_client_dir = dentry; | |
1393 | return 0; | |
1da177e4 | 1394 | } |
e8a79fb1 | 1395 | |
96a374a3 DH |
1396 | static int nfsd_fs_get_tree(struct fs_context *fc) |
1397 | { | |
533770cc | 1398 | return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); |
1da177e4 LT |
1399 | } |
1400 | ||
96a374a3 | 1401 | static void nfsd_fs_free_fc(struct fs_context *fc) |
1da177e4 | 1402 | { |
96a374a3 DH |
1403 | if (fc->s_fs_info) |
1404 | put_net(fc->s_fs_info); | |
1405 | } | |
1406 | ||
1407 | static const struct fs_context_operations nfsd_fs_context_ops = { | |
1408 | .free = nfsd_fs_free_fc, | |
1409 | .get_tree = nfsd_fs_get_tree, | |
1410 | }; | |
1411 | ||
1412 | static int nfsd_init_fs_context(struct fs_context *fc) | |
1da177e4 | 1413 | { |
96a374a3 DH |
1414 | put_user_ns(fc->user_ns); |
1415 | fc->user_ns = get_user_ns(fc->net_ns->user_ns); | |
1416 | fc->ops = &nfsd_fs_context_ops; | |
1417 | return 0; | |
11f77942 SK |
1418 | } |
1419 | ||
1420 | static void nfsd_umount(struct super_block *sb) | |
1421 | { | |
1422 | struct net *net = sb->s_fs_info; | |
1423 | ||
c6c7f2a8 TM |
1424 | nfsd_shutdown_threads(net); |
1425 | ||
11f77942 SK |
1426 | kill_litter_super(sb); |
1427 | put_net(net); | |
1da177e4 LT |
1428 | } |
1429 | ||
1430 | static struct file_system_type nfsd_fs_type = { | |
1431 | .owner = THIS_MODULE, | |
1432 | .name = "nfsd", | |
96a374a3 | 1433 | .init_fs_context = nfsd_init_fs_context, |
11f77942 | 1434 | .kill_sb = nfsd_umount, |
1da177e4 | 1435 | }; |
7f78e035 | 1436 | MODULE_ALIAS_FS("nfsd"); |
1da177e4 | 1437 | |
e331f606 BF |
1438 | #ifdef CONFIG_PROC_FS |
1439 | static int create_proc_exports_entry(void) | |
1440 | { | |
1441 | struct proc_dir_entry *entry; | |
1442 | ||
1443 | entry = proc_mkdir("fs/nfs", NULL); | |
1444 | if (!entry) | |
1445 | return -ENOMEM; | |
97a32539 | 1446 | entry = proc_create("exports", 0, entry, &exports_proc_ops); |
ff7c4b36 | 1447 | if (!entry) { |
1448 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1449 | return -ENOMEM; |
ff7c4b36 | 1450 | } |
e331f606 BF |
1451 | return 0; |
1452 | } | |
1453 | #else /* CONFIG_PROC_FS */ | |
1454 | static int create_proc_exports_entry(void) | |
1455 | { | |
1456 | return 0; | |
1457 | } | |
1458 | #endif | |
1459 | ||
c7d03a00 | 1460 | unsigned int nfsd_net_id; |
5717e012 SK |
1461 | |
1462 | static __net_init int nfsd_init_net(struct net *net) | |
1463 | { | |
1464 | int retval; | |
3d733711 | 1465 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5717e012 SK |
1466 | |
1467 | retval = nfsd_export_init(net); | |
1468 | if (retval) | |
1469 | goto out_export_error; | |
f69adb2f SK |
1470 | retval = nfsd_idmap_init(net); |
1471 | if (retval) | |
1472 | goto out_idmap_error; | |
e333f3bb TM |
1473 | nn->nfsd_versions = NULL; |
1474 | nn->nfsd4_minorversions = NULL; | |
3ba75830 BF |
1475 | retval = nfsd_reply_cache_init(nn); |
1476 | if (retval) | |
1477 | goto out_drc_error; | |
3bf6b57e BF |
1478 | nn->nfsd4_lease = 90; /* default lease time */ |
1479 | nn->nfsd4_grace = 90; | |
03f318ca | 1480 | nn->somebody_reclaimed = false; |
362063a5 | 1481 | nn->track_reclaim_completes = false; |
ebd7c72c | 1482 | nn->clverifier_counter = prandom_u32(); |
bf5ed3e3 BF |
1483 | nn->clientid_base = prandom_u32(); |
1484 | nn->clientid_counter = nn->clientid_base + 1; | |
e0639dc5 | 1485 | nn->s2s_cp_cl_id = nn->clientid_counter++; |
2317dc55 | 1486 | |
91d2e9b5 CL |
1487 | get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); |
1488 | seqlock_init(&nn->writeverf_lock); | |
2c830dd7 | 1489 | |
5717e012 SK |
1490 | return 0; |
1491 | ||
3ba75830 BF |
1492 | out_drc_error: |
1493 | nfsd_idmap_shutdown(net); | |
f69adb2f SK |
1494 | out_idmap_error: |
1495 | nfsd_export_shutdown(net); | |
5717e012 SK |
1496 | out_export_error: |
1497 | return retval; | |
1498 | } | |
1499 | ||
1500 | static __net_exit void nfsd_exit_net(struct net *net) | |
1501 | { | |
3ba75830 BF |
1502 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
1503 | ||
1504 | nfsd_reply_cache_shutdown(nn); | |
f69adb2f | 1505 | nfsd_idmap_shutdown(net); |
5717e012 | 1506 | nfsd_export_shutdown(net); |
e333f3bb | 1507 | nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); |
5717e012 SK |
1508 | } |
1509 | ||
7ea34ac1 | 1510 | static struct pernet_operations nfsd_net_ops = { |
5717e012 SK |
1511 | .init = nfsd_init_net, |
1512 | .exit = nfsd_exit_net, | |
7ea34ac1 JL |
1513 | .id = &nfsd_net_id, |
1514 | .size = sizeof(struct nfsd_net), | |
1515 | }; | |
1516 | ||
1da177e4 LT |
1517 | static int __init init_nfsd(void) |
1518 | { | |
1519 | int retval; | |
1520 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1521 | ||
bb7ffbf2 GC |
1522 | retval = nfsd4_init_slabs(); |
1523 | if (retval) | |
b10252c7 | 1524 | return retval; |
9cf514cc | 1525 | retval = nfsd4_init_pnfs(); |
65178db4 BS |
1526 | if (retval) |
1527 | goto out_free_slabs; | |
e567b98c AG |
1528 | retval = nfsd_stat_init(); /* Statistics */ |
1529 | if (retval) | |
1530 | goto out_free_pnfs; | |
027690c7 BF |
1531 | retval = nfsd_drc_slab_create(); |
1532 | if (retval) | |
1533 | goto out_free_stat; | |
1da177e4 | 1534 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
e331f606 BF |
1535 | retval = create_proc_exports_entry(); |
1536 | if (retval) | |
f69adb2f | 1537 | goto out_free_lockd; |
1da177e4 | 1538 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f | 1539 | if (retval) |
bd5ae928 BF |
1540 | goto out_free_exports; |
1541 | retval = register_pernet_subsys(&nfsd_net_ops); | |
1542 | if (retval < 0) | |
b10252c7 AS |
1543 | goto out_free_filesystem; |
1544 | retval = register_cld_notifier(); | |
1545 | if (retval) | |
26808d3f BF |
1546 | goto out_free_all; |
1547 | return 0; | |
1548 | out_free_all: | |
b10252c7 AS |
1549 | unregister_pernet_subsys(&nfsd_net_ops); |
1550 | out_free_filesystem: | |
1d625050 | 1551 | unregister_filesystem(&nfsd_fs_type); |
bd5ae928 | 1552 | out_free_exports: |
26808d3f BF |
1553 | remove_proc_entry("fs/nfs/exports", NULL); |
1554 | remove_proc_entry("fs/nfs", NULL); | |
dbf847ec | 1555 | out_free_lockd: |
26808d3f | 1556 | nfsd_lockd_shutdown(); |
027690c7 BF |
1557 | nfsd_drc_slab_free(); |
1558 | out_free_stat: | |
d5c3428b | 1559 | nfsd_stat_shutdown(); |
e567b98c | 1560 | out_free_pnfs: |
9cf514cc | 1561 | nfsd4_exit_pnfs(); |
65178db4 | 1562 | out_free_slabs: |
26808d3f | 1563 | nfsd4_free_slabs(); |
1da177e4 LT |
1564 | return retval; |
1565 | } | |
1566 | ||
1567 | static void __exit exit_nfsd(void) | |
1568 | { | |
b10252c7 | 1569 | unregister_cld_notifier(); |
bd5ae928 | 1570 | unregister_pernet_subsys(&nfsd_net_ops); |
027690c7 | 1571 | nfsd_drc_slab_free(); |
1da177e4 LT |
1572 | remove_proc_entry("fs/nfs/exports", NULL); |
1573 | remove_proc_entry("fs/nfs", NULL); | |
1574 | nfsd_stat_shutdown(); | |
1575 | nfsd_lockd_shutdown(); | |
e8ff2a84 | 1576 | nfsd4_free_slabs(); |
9cf514cc | 1577 | nfsd4_exit_pnfs(); |
1da177e4 LT |
1578 | unregister_filesystem(&nfsd_fs_type); |
1579 | } | |
1580 | ||
1581 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1582 | MODULE_LICENSE("GPL"); | |
1583 | module_init(init_nfsd) | |
1584 | module_exit(exit_nfsd) |