Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Syscall interface to knfsd. |
3 | * | |
4 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
5 | */ | |
6 | ||
5a0e3ad6 | 7 | #include <linux/slab.h> |
3f8206d4 | 8 | #include <linux/namei.h> |
b41b66d6 | 9 | #include <linux/ctype.h> |
1da177e4 | 10 | |
80212d59 | 11 | #include <linux/sunrpc/svcsock.h> |
4373ea84 | 12 | #include <linux/lockd/lockd.h> |
5976687a | 13 | #include <linux/sunrpc/addr.h> |
b0b0c0a2 | 14 | #include <linux/sunrpc/gss_api.h> |
b084f598 | 15 | #include <linux/sunrpc/gss_krb5_enctypes.h> |
813fd320 | 16 | #include <linux/sunrpc/rpc_pipe_fs.h> |
143cb494 | 17 | #include <linux/module.h> |
1da177e4 | 18 | |
2ca72e17 | 19 | #include "idmap.h" |
9a74af21 BH |
20 | #include "nfsd.h" |
21 | #include "cache.h" | |
f3c7521f | 22 | #include "state.h" |
7ea34ac1 | 23 | #include "netns.h" |
9a74af21 | 24 | |
1da177e4 | 25 | /* |
b0b0c0a2 | 26 | * We have a single directory with several nodes in it. |
1da177e4 LT |
27 | */ |
28 | enum { | |
29 | NFSD_Root = 1, | |
1da177e4 | 30 | NFSD_List, |
e8e8753f | 31 | NFSD_Export_features, |
1da177e4 | 32 | NFSD_Fh, |
4373ea84 | 33 | NFSD_FO_UnlockIP, |
17efa372 | 34 | NFSD_FO_UnlockFS, |
1da177e4 | 35 | NFSD_Threads, |
eed2965a | 36 | NFSD_Pool_Threads, |
03cf6c9f | 37 | NFSD_Pool_Stats, |
a2f999a3 | 38 | NFSD_Reply_Cache_Stats, |
70c3b76c | 39 | NFSD_Versions, |
80212d59 | 40 | NFSD_Ports, |
596bbe53 | 41 | NFSD_MaxBlkSize, |
5b8db00b | 42 | NFSD_MaxConnections, |
b0b0c0a2 | 43 | NFSD_SupportedEnctypes, |
70c3b76c N |
44 | /* |
45 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
46 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
47 | */ | |
48 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 49 | NFSD_Leasetime, |
efc4bb4f | 50 | NFSD_Gracetime, |
0964a3d3 | 51 | NFSD_RecoveryDir, |
70c3b76c | 52 | #endif |
1da177e4 LT |
53 | }; |
54 | ||
55 | /* | |
56 | * write() for these nodes. | |
57 | */ | |
1da177e4 | 58 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
59 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
60 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 61 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 62 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 63 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 64 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 65 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
5b8db00b | 66 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size); |
70c3b76c | 67 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 68 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 69 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 70 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 71 | #endif |
1da177e4 LT |
72 | |
73 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
1da177e4 | 74 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
75 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
76 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 77 | [NFSD_Threads] = write_threads, |
eed2965a | 78 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 79 | [NFSD_Versions] = write_versions, |
80212d59 | 80 | [NFSD_Ports] = write_ports, |
596bbe53 | 81 | [NFSD_MaxBlkSize] = write_maxblksize, |
5b8db00b | 82 | [NFSD_MaxConnections] = write_maxconn, |
70c3b76c | 83 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 84 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 85 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 86 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 87 | #endif |
1da177e4 LT |
88 | }; |
89 | ||
90 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
91 | { | |
496ad9aa | 92 | ino_t ino = file_inode(file)->i_ino; |
1da177e4 LT |
93 | char *data; |
94 | ssize_t rv; | |
95 | ||
e8c96f8c | 96 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
97 | return -EINVAL; |
98 | ||
99 | data = simple_transaction_get(file, buf, size); | |
100 | if (IS_ERR(data)) | |
101 | return PTR_ERR(data); | |
102 | ||
103 | rv = write_op[ino](file, data, size); | |
8971a101 | 104 | if (rv >= 0) { |
1da177e4 LT |
105 | simple_transaction_set(file, rv); |
106 | rv = size; | |
107 | } | |
108 | return rv; | |
109 | } | |
110 | ||
7390022d N |
111 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
112 | { | |
113 | if (! file->private_data) { | |
114 | /* An attempt to read a transaction file without writing | |
115 | * causes a 0-byte write so that the file can return | |
116 | * state information | |
117 | */ | |
118 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
119 | if (rv < 0) | |
120 | return rv; | |
121 | } | |
122 | return simple_transaction_read(file, buf, size, pos); | |
123 | } | |
124 | ||
4b6f5d20 | 125 | static const struct file_operations transaction_ops = { |
1da177e4 | 126 | .write = nfsctl_transaction_write, |
7390022d | 127 | .read = nfsctl_transaction_read, |
1da177e4 | 128 | .release = simple_transaction_release, |
6038f373 | 129 | .llseek = default_llseek, |
1da177e4 LT |
130 | }; |
131 | ||
96d851c4 | 132 | static int exports_net_open(struct net *net, struct file *file) |
1da177e4 | 133 | { |
f2c7ea10 SK |
134 | int err; |
135 | struct seq_file *seq; | |
96d851c4 | 136 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
f2c7ea10 SK |
137 | |
138 | err = seq_open(file, &nfs_exports_op); | |
139 | if (err) | |
140 | return err; | |
141 | ||
142 | seq = file->private_data; | |
e5f06f72 | 143 | seq->private = nn->svc_export_cache; |
f2c7ea10 | 144 | return 0; |
1da177e4 LT |
145 | } |
146 | ||
96d851c4 SK |
147 | static int exports_proc_open(struct inode *inode, struct file *file) |
148 | { | |
149 | return exports_net_open(current->nsproxy->net_ns, file); | |
150 | } | |
151 | ||
152 | static const struct file_operations exports_proc_operations = { | |
153 | .open = exports_proc_open, | |
154 | .read = seq_read, | |
155 | .llseek = seq_lseek, | |
156 | .release = seq_release, | |
157 | .owner = THIS_MODULE, | |
158 | }; | |
159 | ||
160 | static int exports_nfsd_open(struct inode *inode, struct file *file) | |
161 | { | |
162 | return exports_net_open(inode->i_sb->s_fs_info, file); | |
163 | } | |
164 | ||
165 | static const struct file_operations exports_nfsd_operations = { | |
166 | .open = exports_nfsd_open, | |
1da177e4 LT |
167 | .read = seq_read, |
168 | .llseek = seq_lseek, | |
169 | .release = seq_release, | |
9ef2db26 | 170 | .owner = THIS_MODULE, |
1da177e4 LT |
171 | }; |
172 | ||
e8e8753f BF |
173 | static int export_features_show(struct seq_file *m, void *v) |
174 | { | |
175 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
176 | return 0; | |
177 | } | |
178 | ||
179 | static int export_features_open(struct inode *inode, struct file *file) | |
180 | { | |
181 | return single_open(file, export_features_show, NULL); | |
182 | } | |
183 | ||
75ef9de1 | 184 | static const struct file_operations export_features_operations = { |
e8e8753f BF |
185 | .open = export_features_open, |
186 | .read = seq_read, | |
187 | .llseek = seq_lseek, | |
188 | .release = single_release, | |
189 | }; | |
190 | ||
b084f598 | 191 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 KC |
192 | static int supported_enctypes_show(struct seq_file *m, void *v) |
193 | { | |
b084f598 | 194 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); |
b0b0c0a2 KC |
195 | return 0; |
196 | } | |
197 | ||
198 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
199 | { | |
200 | return single_open(file, supported_enctypes_show, NULL); | |
201 | } | |
202 | ||
75ef9de1 | 203 | static const struct file_operations supported_enctypes_ops = { |
b0b0c0a2 KC |
204 | .open = supported_enctypes_open, |
205 | .read = seq_read, | |
206 | .llseek = seq_lseek, | |
207 | .release = single_release, | |
208 | }; | |
b084f598 | 209 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
b0b0c0a2 | 210 | |
828c0950 | 211 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
212 | .open = nfsd_pool_stats_open, |
213 | .read = seq_read, | |
214 | .llseek = seq_lseek, | |
ed2d8aed | 215 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
216 | .owner = THIS_MODULE, |
217 | }; | |
218 | ||
a2f999a3 JL |
219 | static struct file_operations reply_cache_stats_operations = { |
220 | .open = nfsd_reply_cache_stats_open, | |
221 | .read = seq_read, | |
222 | .llseek = seq_lseek, | |
223 | .release = single_release, | |
224 | }; | |
225 | ||
1da177e4 LT |
226 | /*----------------------------------------------------------------------------*/ |
227 | /* | |
228 | * payload - write methods | |
1da177e4 LT |
229 | */ |
230 | ||
1da177e4 | 231 | |
262a0982 CL |
232 | /** |
233 | * write_unlock_ip - Release all locks used by a client | |
234 | * | |
235 | * Experimental. | |
236 | * | |
237 | * Input: | |
238 | * buf: '\n'-terminated C string containing a | |
4116092b | 239 | * presentation format IP address |
262a0982 CL |
240 | * size: length of C string in @buf |
241 | * Output: | |
242 | * On success: returns zero if all specified locks were released; | |
243 | * returns one if one or more locks were not released | |
244 | * On error: return code is negative errno value | |
262a0982 | 245 | */ |
b046ccdc | 246 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 247 | { |
4116092b CL |
248 | struct sockaddr_storage address; |
249 | struct sockaddr *sap = (struct sockaddr *)&address; | |
250 | size_t salen = sizeof(address); | |
367c8c7b | 251 | char *fo_path; |
11f77942 | 252 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
4373ea84 WC |
253 | |
254 | /* sanity check */ | |
255 | if (size == 0) | |
256 | return -EINVAL; | |
257 | ||
258 | if (buf[size-1] != '\n') | |
259 | return -EINVAL; | |
260 | ||
261 | fo_path = buf; | |
262 | if (qword_get(&buf, fo_path, size) < 0) | |
263 | return -EINVAL; | |
264 | ||
11f77942 | 265 | if (rpc_pton(net, fo_path, size, sap, salen) == 0) |
4373ea84 | 266 | return -EINVAL; |
4373ea84 | 267 | |
4116092b | 268 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
269 | } |
270 | ||
262a0982 CL |
271 | /** |
272 | * write_unlock_fs - Release all locks on a local file system | |
273 | * | |
274 | * Experimental. | |
275 | * | |
276 | * Input: | |
277 | * buf: '\n'-terminated C string containing the | |
278 | * absolute pathname of a local file system | |
279 | * size: length of C string in @buf | |
280 | * Output: | |
281 | * On success: returns zero if all specified locks were released; | |
282 | * returns one if one or more locks were not released | |
283 | * On error: return code is negative errno value | |
284 | */ | |
b046ccdc | 285 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 286 | { |
a63bb996 | 287 | struct path path; |
17efa372 WC |
288 | char *fo_path; |
289 | int error; | |
290 | ||
291 | /* sanity check */ | |
292 | if (size == 0) | |
293 | return -EINVAL; | |
294 | ||
295 | if (buf[size-1] != '\n') | |
296 | return -EINVAL; | |
297 | ||
298 | fo_path = buf; | |
299 | if (qword_get(&buf, fo_path, size) < 0) | |
300 | return -EINVAL; | |
301 | ||
a63bb996 | 302 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
303 | if (error) |
304 | return error; | |
305 | ||
262a0982 CL |
306 | /* |
307 | * XXX: Needs better sanity checking. Otherwise we could end up | |
308 | * releasing locks on the wrong file system. | |
309 | * | |
310 | * For example: | |
311 | * 1. Does the path refer to a directory? | |
312 | * 2. Is that directory a mount point, or | |
313 | * 3. Is that directory the root of an exported file system? | |
314 | */ | |
d8c9584e | 315 | error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); |
17efa372 | 316 | |
a63bb996 | 317 | path_put(&path); |
17efa372 WC |
318 | return error; |
319 | } | |
320 | ||
262a0982 CL |
321 | /** |
322 | * write_filehandle - Get a variable-length NFS file handle by path | |
323 | * | |
324 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
325 | * three alphanumeric words separated by whitespace. The string may | |
326 | * contain escape sequences. | |
327 | * | |
328 | * Input: | |
329 | * buf: | |
330 | * domain: client domain name | |
331 | * path: export pathname | |
332 | * maxsize: numeric maximum size of | |
333 | * @buf | |
334 | * size: length of C string in @buf | |
335 | * Output: | |
336 | * On success: passed-in buffer filled with '\n'-terminated C | |
337 | * string containing a ASCII hex text version | |
338 | * of the NFS file handle; | |
339 | * return code is the size in bytes of the string | |
340 | * On error: return code is negative errno value | |
341 | */ | |
1da177e4 LT |
342 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
343 | { | |
1da177e4 | 344 | char *dname, *path; |
246d95ba | 345 | int uninitialized_var(maxsize); |
1da177e4 LT |
346 | char *mesg = buf; |
347 | int len; | |
348 | struct auth_domain *dom; | |
349 | struct knfsd_fh fh; | |
11f77942 | 350 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
1da177e4 | 351 | |
87d26ea7 BF |
352 | if (size == 0) |
353 | return -EINVAL; | |
354 | ||
1da177e4 LT |
355 | if (buf[size-1] != '\n') |
356 | return -EINVAL; | |
357 | buf[size-1] = 0; | |
358 | ||
359 | dname = mesg; | |
360 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
361 | if (len <= 0) |
362 | return -EINVAL; | |
1da177e4 LT |
363 | |
364 | path = dname+len+1; | |
365 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
366 | if (len <= 0) |
367 | return -EINVAL; | |
1da177e4 LT |
368 | |
369 | len = get_int(&mesg, &maxsize); | |
370 | if (len) | |
371 | return len; | |
372 | ||
373 | if (maxsize < NFS_FHSIZE) | |
374 | return -EINVAL; | |
3c7aa15d | 375 | maxsize = min(maxsize, NFS3_FHSIZE); |
1da177e4 LT |
376 | |
377 | if (qword_get(&mesg, mesg, size)>0) | |
378 | return -EINVAL; | |
379 | ||
380 | /* we have all the words, they are in buf.. */ | |
381 | dom = unix_domain_find(dname); | |
382 | if (!dom) | |
383 | return -ENOMEM; | |
384 | ||
11f77942 | 385 | len = exp_rootfh(net, dom, path, &fh, maxsize); |
1da177e4 LT |
386 | auth_domain_put(dom); |
387 | if (len) | |
388 | return len; | |
389 | ||
54224f04 CL |
390 | mesg = buf; |
391 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
392 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
393 | mesg[-1] = '\n'; | |
394 | return mesg - buf; | |
395 | } | |
396 | ||
262a0982 CL |
397 | /** |
398 | * write_threads - Start NFSD, or report the current number of running threads | |
399 | * | |
400 | * Input: | |
401 | * buf: ignored | |
402 | * size: zero | |
403 | * Output: | |
404 | * On success: passed-in buffer filled with '\n'-terminated C | |
405 | * string numeric value representing the number of | |
406 | * running NFSD threads; | |
407 | * return code is the size in bytes of the string | |
408 | * On error: return code is zero | |
409 | * | |
410 | * OR | |
411 | * | |
412 | * Input: | |
413 | * buf: C string containing an unsigned | |
414 | * integer value representing the | |
415 | * number of NFSD threads to start | |
416 | * size: non-zero length of C string in @buf | |
417 | * Output: | |
418 | * On success: NFS service is started; | |
419 | * passed-in buffer filled with '\n'-terminated C | |
420 | * string numeric value representing the number of | |
421 | * running NFSD threads; | |
422 | * return code is the size in bytes of the string | |
423 | * On error: return code is zero or a negative errno value | |
424 | */ | |
1da177e4 LT |
425 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
426 | { | |
1da177e4 LT |
427 | char *mesg = buf; |
428 | int rv; | |
11f77942 | 429 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
d41a9417 | 430 | |
1da177e4 LT |
431 | if (size > 0) { |
432 | int newthreads; | |
433 | rv = get_int(&mesg, &newthreads); | |
434 | if (rv) | |
435 | return rv; | |
9e074856 | 436 | if (newthreads < 0) |
1da177e4 | 437 | return -EINVAL; |
d41a9417 | 438 | rv = nfsd_svc(newthreads, net); |
82e12fe9 | 439 | if (rv < 0) |
1da177e4 | 440 | return rv; |
82e12fe9 | 441 | } else |
9dd9845f | 442 | rv = nfsd_nrthreads(net); |
e06b6405 | 443 | |
82e12fe9 | 444 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
445 | } |
446 | ||
262a0982 CL |
447 | /** |
448 | * write_pool_threads - Set or report the current number of threads per pool | |
449 | * | |
450 | * Input: | |
451 | * buf: ignored | |
452 | * size: zero | |
453 | * | |
454 | * OR | |
455 | * | |
456 | * Input: | |
457 | * buf: C string containing whitespace- | |
458 | * separated unsigned integer values | |
459 | * representing the number of NFSD | |
460 | * threads to start in each pool | |
461 | * size: non-zero length of C string in @buf | |
462 | * Output: | |
463 | * On success: passed-in buffer filled with '\n'-terminated C | |
464 | * string containing integer values representing the | |
465 | * number of NFSD threads in each pool; | |
466 | * return code is the size in bytes of the string | |
467 | * On error: return code is zero or a negative errno value | |
468 | */ | |
eed2965a GB |
469 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
470 | { | |
471 | /* if size > 0, look for an array of number of threads per node | |
472 | * and apply them then write out number of threads per node as reply | |
473 | */ | |
474 | char *mesg = buf; | |
475 | int i; | |
476 | int rv; | |
477 | int len; | |
bedbdd8b | 478 | int npools; |
eed2965a | 479 | int *nthreads; |
11f77942 | 480 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
eed2965a | 481 | |
bedbdd8b | 482 | mutex_lock(&nfsd_mutex); |
9dd9845f | 483 | npools = nfsd_nrpools(net); |
eed2965a GB |
484 | if (npools == 0) { |
485 | /* | |
486 | * NFS is shut down. The admin can start it by | |
487 | * writing to the threads file but NOT the pool_threads | |
488 | * file, sorry. Report zero threads. | |
489 | */ | |
bedbdd8b | 490 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
491 | strcpy(buf, "0\n"); |
492 | return strlen(buf); | |
493 | } | |
494 | ||
495 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 496 | rv = -ENOMEM; |
eed2965a | 497 | if (nthreads == NULL) |
bedbdd8b | 498 | goto out_free; |
eed2965a GB |
499 | |
500 | if (size > 0) { | |
501 | for (i = 0; i < npools; i++) { | |
502 | rv = get_int(&mesg, &nthreads[i]); | |
503 | if (rv == -ENOENT) | |
504 | break; /* fewer numbers than pools */ | |
505 | if (rv) | |
506 | goto out_free; /* syntax error */ | |
507 | rv = -EINVAL; | |
508 | if (nthreads[i] < 0) | |
509 | goto out_free; | |
510 | } | |
3938a0d5 | 511 | rv = nfsd_set_nrthreads(i, nthreads, net); |
eed2965a GB |
512 | if (rv) |
513 | goto out_free; | |
514 | } | |
515 | ||
9dd9845f | 516 | rv = nfsd_get_nrthreads(npools, nthreads, net); |
eed2965a GB |
517 | if (rv) |
518 | goto out_free; | |
519 | ||
520 | mesg = buf; | |
521 | size = SIMPLE_TRANSACTION_LIMIT; | |
522 | for (i = 0; i < npools && size > 0; i++) { | |
523 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
524 | len = strlen(mesg); | |
525 | size -= len; | |
526 | mesg += len; | |
527 | } | |
413d63d7 | 528 | rv = mesg - buf; |
eed2965a GB |
529 | out_free: |
530 | kfree(nthreads); | |
bedbdd8b | 531 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
532 | return rv; |
533 | } | |
534 | ||
3dd98a3b | 535 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 536 | { |
70c3b76c | 537 | char *mesg = buf; |
8daf220a | 538 | char *vers, *minorp, sign; |
261758b5 | 539 | int len, num, remaining; |
8daf220a | 540 | unsigned minor; |
70c3b76c N |
541 | ssize_t tlen = 0; |
542 | char *sep; | |
11f77942 | 543 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
9dd9845f | 544 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
70c3b76c N |
545 | |
546 | if (size>0) { | |
9dd9845f | 547 | if (nn->nfsd_serv) |
6658d3a7 | 548 | /* Cannot change versions without updating |
9dd9845f | 549 | * nn->nfsd_serv->sv_xdrsize, and reallocing |
6658d3a7 N |
550 | * rq_argp and rq_resp |
551 | */ | |
70c3b76c N |
552 | return -EBUSY; |
553 | if (buf[size-1] != '\n') | |
554 | return -EINVAL; | |
555 | buf[size-1] = 0; | |
556 | ||
557 | vers = mesg; | |
558 | len = qword_get(&mesg, vers, size); | |
559 | if (len <= 0) return -EINVAL; | |
560 | do { | |
561 | sign = *vers; | |
562 | if (sign == '+' || sign == '-') | |
8daf220a | 563 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 564 | else |
8daf220a BH |
565 | num = simple_strtol(vers, &minorp, 0); |
566 | if (*minorp == '.') { | |
ff89be87 | 567 | if (num != 4) |
8daf220a BH |
568 | return -EINVAL; |
569 | minor = simple_strtoul(minorp+1, NULL, 0); | |
570 | if (minor == 0) | |
571 | return -EINVAL; | |
572 | if (nfsd_minorversion(minor, sign == '-' ? | |
573 | NFSD_CLEAR : NFSD_SET) < 0) | |
574 | return -EINVAL; | |
575 | goto next; | |
576 | } | |
70c3b76c N |
577 | switch(num) { |
578 | case 2: | |
579 | case 3: | |
580 | case 4: | |
6658d3a7 | 581 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
582 | break; |
583 | default: | |
584 | return -EINVAL; | |
585 | } | |
8daf220a | 586 | next: |
70c3b76c | 587 | vers += len + 1; |
70c3b76c N |
588 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
589 | /* If all get turned off, turn them back on, as | |
590 | * having no versions is BAD | |
591 | */ | |
6658d3a7 | 592 | nfsd_reset_versions(); |
70c3b76c | 593 | } |
261758b5 | 594 | |
70c3b76c N |
595 | /* Now write current state into reply buffer */ |
596 | len = 0; | |
597 | sep = ""; | |
261758b5 | 598 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 599 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 600 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 601 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 602 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
603 | num); |
604 | sep = " "; | |
261758b5 CL |
605 | |
606 | if (len > remaining) | |
607 | break; | |
608 | remaining -= len; | |
609 | buf += len; | |
610 | tlen += len; | |
70c3b76c | 611 | } |
8daf220a | 612 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
613 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
614 | minor++) { | |
615 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
616 | (nfsd_vers(4, NFSD_TEST) && |
617 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
618 | '+' : '-', | |
619 | minor); | |
261758b5 CL |
620 | |
621 | if (len > remaining) | |
622 | break; | |
623 | remaining -= len; | |
624 | buf += len; | |
625 | tlen += len; | |
626 | } | |
627 | ||
628 | len = snprintf(buf, remaining, "\n"); | |
629 | if (len > remaining) | |
630 | return -EINVAL; | |
631 | return tlen + len; | |
70c3b76c N |
632 | } |
633 | ||
262a0982 CL |
634 | /** |
635 | * write_versions - Set or report the available NFS protocol versions | |
636 | * | |
637 | * Input: | |
638 | * buf: ignored | |
639 | * size: zero | |
640 | * Output: | |
641 | * On success: passed-in buffer filled with '\n'-terminated C | |
642 | * string containing positive or negative integer | |
643 | * values representing the current status of each | |
644 | * protocol version; | |
645 | * return code is the size in bytes of the string | |
646 | * On error: return code is zero or a negative errno value | |
647 | * | |
648 | * OR | |
649 | * | |
650 | * Input: | |
651 | * buf: C string containing whitespace- | |
652 | * separated positive or negative | |
653 | * integer values representing NFS | |
654 | * protocol versions to enable ("+n") | |
655 | * or disable ("-n") | |
656 | * size: non-zero length of C string in @buf | |
657 | * Output: | |
658 | * On success: status of zero or more protocol versions has | |
659 | * been updated; passed-in buffer filled with | |
660 | * '\n'-terminated C string containing positive | |
661 | * or negative integer values representing the | |
662 | * current status of each protocol version; | |
663 | * return code is the size in bytes of the string | |
664 | * On error: return code is zero or a negative errno value | |
665 | */ | |
3dd98a3b JL |
666 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
667 | { | |
668 | ssize_t rv; | |
669 | ||
670 | mutex_lock(&nfsd_mutex); | |
671 | rv = __write_versions(file, buf, size); | |
672 | mutex_unlock(&nfsd_mutex); | |
673 | return rv; | |
674 | } | |
675 | ||
0a5372d8 CL |
676 | /* |
677 | * Zero-length write. Return a list of NFSD's current listener | |
678 | * transports. | |
679 | */ | |
9dd9845f | 680 | static ssize_t __write_ports_names(char *buf, struct net *net) |
0a5372d8 | 681 | { |
9dd9845f SK |
682 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
683 | ||
684 | if (nn->nfsd_serv == NULL) | |
0a5372d8 | 685 | return 0; |
9dd9845f | 686 | return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
687 | } |
688 | ||
0b7c2f6f CL |
689 | /* |
690 | * A single 'fd' number was written, in which case it must be for | |
691 | * a socket of a supported family/protocol, and we use it as an | |
692 | * nfsd listener. | |
693 | */ | |
08160352 | 694 | static ssize_t __write_ports_addfd(char *buf, struct net *net) |
0b7c2f6f CL |
695 | { |
696 | char *mesg = buf; | |
697 | int fd, err; | |
9dd9845f | 698 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
0b7c2f6f CL |
699 | |
700 | err = get_int(&mesg, &fd); | |
701 | if (err != 0 || fd < 0) | |
702 | return -EINVAL; | |
703 | ||
30646394 SK |
704 | if (svc_alien_sock(net, fd)) { |
705 | printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); | |
706 | return -EINVAL; | |
707 | } | |
708 | ||
6777436b | 709 | err = nfsd_create_serv(net); |
0b7c2f6f CL |
710 | if (err != 0) |
711 | return err; | |
712 | ||
9dd9845f | 713 | err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
78a8d7c8 | 714 | if (err < 0) { |
19f7e2ca | 715 | nfsd_destroy(net); |
78a8d7c8 JL |
716 | return err; |
717 | } | |
0b7c2f6f | 718 | |
ea068bad | 719 | /* Decrease the count, but don't shut down the service */ |
9dd9845f | 720 | nn->nfsd_serv->sv_nrthreads--; |
ea068bad | 721 | return err; |
0b7c2f6f CL |
722 | } |
723 | ||
4eb68c26 CL |
724 | /* |
725 | * A transport listener is added by writing it's transport name and | |
726 | * a port number. | |
727 | */ | |
08160352 | 728 | static ssize_t __write_ports_addxprt(char *buf, struct net *net) |
4eb68c26 CL |
729 | { |
730 | char transport[16]; | |
37498292 | 731 | struct svc_xprt *xprt; |
4eb68c26 | 732 | int port, err; |
9dd9845f | 733 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
4eb68c26 | 734 | |
a10fded1 | 735 | if (sscanf(buf, "%15s %5u", transport, &port) != 2) |
4eb68c26 CL |
736 | return -EINVAL; |
737 | ||
4be929be | 738 | if (port < 1 || port > USHRT_MAX) |
4eb68c26 CL |
739 | return -EINVAL; |
740 | ||
6777436b | 741 | err = nfsd_create_serv(net); |
4eb68c26 CL |
742 | if (err != 0) |
743 | return err; | |
744 | ||
9dd9845f | 745 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
4eb68c26 | 746 | PF_INET, port, SVC_SOCK_ANONYMOUS); |
68717908 | 747 | if (err < 0) |
37498292 CL |
748 | goto out_err; |
749 | ||
9dd9845f | 750 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
37498292 CL |
751 | PF_INET6, port, SVC_SOCK_ANONYMOUS); |
752 | if (err < 0 && err != -EAFNOSUPPORT) | |
753 | goto out_close; | |
0cd14a06 JL |
754 | |
755 | /* Decrease the count, but don't shut down the service */ | |
9dd9845f | 756 | nn->nfsd_serv->sv_nrthreads--; |
4eb68c26 | 757 | return 0; |
37498292 | 758 | out_close: |
9dd9845f | 759 | xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); |
37498292 CL |
760 | if (xprt != NULL) { |
761 | svc_close_xprt(xprt); | |
762 | svc_xprt_put(xprt); | |
763 | } | |
764 | out_err: | |
19f7e2ca | 765 | nfsd_destroy(net); |
37498292 | 766 | return err; |
4eb68c26 CL |
767 | } |
768 | ||
08160352 SK |
769 | static ssize_t __write_ports(struct file *file, char *buf, size_t size, |
770 | struct net *net) | |
80212d59 | 771 | { |
0a5372d8 | 772 | if (size == 0) |
9dd9845f | 773 | return __write_ports_names(buf, net); |
0b7c2f6f CL |
774 | |
775 | if (isdigit(buf[0])) | |
08160352 | 776 | return __write_ports_addfd(buf, net); |
82d56591 | 777 | |
4eb68c26 | 778 | if (isalpha(buf[0])) |
08160352 | 779 | return __write_ports_addxprt(buf, net); |
4cd5dc75 | 780 | |
b41b66d6 | 781 | return -EINVAL; |
80212d59 N |
782 | } |
783 | ||
262a0982 CL |
784 | /** |
785 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
786 | * | |
787 | * Input: | |
788 | * buf: ignored | |
789 | * size: zero | |
790 | * Output: | |
791 | * On success: passed-in buffer filled with a '\n'-terminated C | |
792 | * string containing a whitespace-separated list of | |
793 | * named NFSD listeners; | |
794 | * return code is the size in bytes of the string | |
795 | * On error: return code is zero or a negative errno value | |
796 | * | |
797 | * OR | |
798 | * | |
799 | * Input: | |
800 | * buf: C string containing an unsigned | |
801 | * integer value representing a bound | |
802 | * but unconnected socket that is to be | |
c71206a7 CL |
803 | * used as an NFSD listener; listen(3) |
804 | * must be called for a SOCK_STREAM | |
805 | * socket, otherwise it is ignored | |
262a0982 CL |
806 | * size: non-zero length of C string in @buf |
807 | * Output: | |
808 | * On success: NFS service is started; | |
809 | * passed-in buffer filled with a '\n'-terminated C | |
810 | * string containing a unique alphanumeric name of | |
811 | * the listener; | |
812 | * return code is the size in bytes of the string | |
813 | * On error: return code is a negative errno value | |
814 | * | |
815 | * OR | |
816 | * | |
817 | * Input: | |
262a0982 CL |
818 | * buf: C string containing a transport |
819 | * name and an unsigned integer value | |
820 | * representing the port to listen on, | |
821 | * separated by whitespace | |
822 | * size: non-zero length of C string in @buf | |
823 | * Output: | |
824 | * On success: returns zero; NFS service is started | |
825 | * On error: return code is a negative errno value | |
262a0982 | 826 | */ |
bedbdd8b NB |
827 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
828 | { | |
829 | ssize_t rv; | |
11f77942 | 830 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
3dd98a3b | 831 | |
bedbdd8b | 832 | mutex_lock(&nfsd_mutex); |
08160352 | 833 | rv = __write_ports(file, buf, size, net); |
bedbdd8b NB |
834 | mutex_unlock(&nfsd_mutex); |
835 | return rv; | |
836 | } | |
837 | ||
838 | ||
596bbe53 N |
839 | int nfsd_max_blksize; |
840 | ||
262a0982 CL |
841 | /** |
842 | * write_maxblksize - Set or report the current NFS blksize | |
843 | * | |
844 | * Input: | |
845 | * buf: ignored | |
846 | * size: zero | |
847 | * | |
848 | * OR | |
849 | * | |
850 | * Input: | |
851 | * buf: C string containing an unsigned | |
852 | * integer value representing the new | |
853 | * NFS blksize | |
854 | * size: non-zero length of C string in @buf | |
855 | * Output: | |
856 | * On success: passed-in buffer filled with '\n'-terminated C string | |
857 | * containing numeric value of the current NFS blksize | |
858 | * setting; | |
859 | * return code is the size in bytes of the string | |
860 | * On error: return code is zero or a negative errno value | |
861 | */ | |
596bbe53 N |
862 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
863 | { | |
864 | char *mesg = buf; | |
11f77942 | 865 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
9dd9845f SK |
866 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
867 | ||
596bbe53 N |
868 | if (size > 0) { |
869 | int bsize; | |
870 | int rv = get_int(&mesg, &bsize); | |
871 | if (rv) | |
872 | return rv; | |
873 | /* force bsize into allowed range and | |
874 | * required alignment. | |
875 | */ | |
3c7aa15d KM |
876 | bsize = max_t(int, bsize, 1024); |
877 | bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); | |
596bbe53 | 878 | bsize &= ~(1024-1); |
bedbdd8b | 879 | mutex_lock(&nfsd_mutex); |
9dd9845f | 880 | if (nn->nfsd_serv) { |
bedbdd8b | 881 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
882 | return -EBUSY; |
883 | } | |
884 | nfsd_max_blksize = bsize; | |
bedbdd8b | 885 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 886 | } |
e06b6405 CL |
887 | |
888 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
889 | nfsd_max_blksize); | |
596bbe53 N |
890 | } |
891 | ||
5b8db00b JL |
892 | /** |
893 | * write_maxconn - Set or report the current max number of connections | |
894 | * | |
895 | * Input: | |
896 | * buf: ignored | |
897 | * size: zero | |
898 | * OR | |
899 | * | |
900 | * Input: | |
901 | * buf: C string containing an unsigned | |
902 | * integer value representing the new | |
903 | * number of max connections | |
904 | * size: non-zero length of C string in @buf | |
905 | * Output: | |
906 | * On success: passed-in buffer filled with '\n'-terminated C string | |
907 | * containing numeric value of max_connections setting | |
908 | * for this net namespace; | |
909 | * return code is the size in bytes of the string | |
910 | * On error: return code is zero or a negative errno value | |
911 | */ | |
912 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size) | |
913 | { | |
914 | char *mesg = buf; | |
915 | struct net *net = file->f_dentry->d_sb->s_fs_info; | |
916 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
917 | unsigned int maxconn = nn->max_connections; | |
918 | ||
919 | if (size > 0) { | |
920 | int rv = get_uint(&mesg, &maxconn); | |
921 | ||
922 | if (rv) | |
923 | return rv; | |
924 | nn->max_connections = maxconn; | |
925 | } | |
926 | ||
927 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); | |
928 | } | |
929 | ||
70c3b76c | 930 | #ifdef CONFIG_NFSD_V4 |
9dd9845f SK |
931 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, |
932 | time_t *time, struct nfsd_net *nn) | |
1da177e4 | 933 | { |
1da177e4 | 934 | char *mesg = buf; |
f0135740 | 935 | int rv, i; |
1da177e4 LT |
936 | |
937 | if (size > 0) { | |
9dd9845f | 938 | if (nn->nfsd_serv) |
3dd98a3b | 939 | return -EBUSY; |
f0135740 | 940 | rv = get_int(&mesg, &i); |
1da177e4 LT |
941 | if (rv) |
942 | return rv; | |
e7b184f1 BF |
943 | /* |
944 | * Some sanity checking. We don't have a reason for | |
945 | * these particular numbers, but problems with the | |
946 | * extremes are: | |
947 | * - Too short: the briefest network outage may | |
948 | * cause clients to lose all their locks. Also, | |
949 | * the frequent polling may be wasteful. | |
950 | * - Too long: do you really want reboot recovery | |
951 | * to take more than an hour? Or to make other | |
952 | * clients wait an hour before being able to | |
953 | * revoke a dead client's locks? | |
954 | */ | |
f0135740 | 955 | if (i < 10 || i > 3600) |
1da177e4 | 956 | return -EINVAL; |
f0135740 | 957 | *time = i; |
1da177e4 | 958 | } |
e06b6405 | 959 | |
f0135740 BF |
960 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); |
961 | } | |
962 | ||
9dd9845f SK |
963 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, |
964 | time_t *time, struct nfsd_net *nn) | |
f0135740 BF |
965 | { |
966 | ssize_t rv; | |
967 | ||
968 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 969 | rv = __nfsd4_write_time(file, buf, size, time, nn); |
f0135740 BF |
970 | mutex_unlock(&nfsd_mutex); |
971 | return rv; | |
1da177e4 LT |
972 | } |
973 | ||
262a0982 CL |
974 | /** |
975 | * write_leasetime - Set or report the current NFSv4 lease time | |
976 | * | |
977 | * Input: | |
978 | * buf: ignored | |
979 | * size: zero | |
980 | * | |
981 | * OR | |
982 | * | |
983 | * Input: | |
984 | * buf: C string containing an unsigned | |
985 | * integer value representing the new | |
986 | * NFSv4 lease expiry time | |
987 | * size: non-zero length of C string in @buf | |
988 | * Output: | |
989 | * On success: passed-in buffer filled with '\n'-terminated C | |
990 | * string containing unsigned integer value of the | |
991 | * current lease expiry time; | |
992 | * return code is the size in bytes of the string | |
993 | * On error: return code is zero or a negative errno value | |
994 | */ | |
3dd98a3b JL |
995 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
996 | { | |
11f77942 SK |
997 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
998 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
9dd9845f | 999 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); |
3dd98a3b JL |
1000 | } |
1001 | ||
efc4bb4f BF |
1002 | /** |
1003 | * write_gracetime - Set or report current NFSv4 grace period time | |
1004 | * | |
1005 | * As above, but sets the time of the NFSv4 grace period. | |
1006 | * | |
1007 | * Note this should never be set to less than the *previous* | |
1008 | * lease-period time, but we don't try to enforce this. (In the common | |
1009 | * case (a new boot), we don't know what the previous lease time was | |
1010 | * anyway.) | |
1011 | */ | |
1012 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1013 | { | |
11f77942 SK |
1014 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
1015 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
9dd9845f | 1016 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); |
efc4bb4f BF |
1017 | } |
1018 | ||
9dd9845f SK |
1019 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, |
1020 | struct nfsd_net *nn) | |
0964a3d3 N |
1021 | { |
1022 | char *mesg = buf; | |
1023 | char *recdir; | |
1024 | int len, status; | |
1025 | ||
3dd98a3b | 1026 | if (size > 0) { |
9dd9845f | 1027 | if (nn->nfsd_serv) |
3dd98a3b JL |
1028 | return -EBUSY; |
1029 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1030 | return -EINVAL; | |
1031 | buf[size-1] = 0; | |
0964a3d3 | 1032 | |
3dd98a3b JL |
1033 | recdir = mesg; |
1034 | len = qword_get(&mesg, recdir, size); | |
1035 | if (len <= 0) | |
1036 | return -EINVAL; | |
0964a3d3 | 1037 | |
3dd98a3b | 1038 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1039 | if (status) |
1040 | return status; | |
3dd98a3b | 1041 | } |
3d72ab8f CL |
1042 | |
1043 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1044 | nfs4_recoverydir()); | |
0964a3d3 | 1045 | } |
3dd98a3b | 1046 | |
262a0982 CL |
1047 | /** |
1048 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1049 | * | |
1050 | * Input: | |
1051 | * buf: ignored | |
1052 | * size: zero | |
1053 | * | |
1054 | * OR | |
1055 | * | |
1056 | * Input: | |
1057 | * buf: C string containing the pathname | |
1058 | * of the directory on a local file | |
1059 | * system containing permanent NFSv4 | |
1060 | * recovery data | |
1061 | * size: non-zero length of C string in @buf | |
1062 | * Output: | |
1063 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1064 | * containing the current recovery pathname setting; | |
1065 | * return code is the size in bytes of the string | |
1066 | * On error: return code is zero or a negative errno value | |
1067 | */ | |
3dd98a3b JL |
1068 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1069 | { | |
1070 | ssize_t rv; | |
11f77942 SK |
1071 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
1072 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
3dd98a3b JL |
1073 | |
1074 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 1075 | rv = __write_recoverydir(file, buf, size, nn); |
3dd98a3b JL |
1076 | mutex_unlock(&nfsd_mutex); |
1077 | return rv; | |
1078 | } | |
1079 | ||
70c3b76c | 1080 | #endif |
0964a3d3 | 1081 | |
1da177e4 LT |
1082 | /*----------------------------------------------------------------------------*/ |
1083 | /* | |
1084 | * populating the filesystem. | |
1085 | */ | |
1086 | ||
1087 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1088 | { | |
1089 | static struct tree_descr nfsd_files[] = { | |
96d851c4 | 1090 | [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, |
e8e8753f BF |
1091 | [NFSD_Export_features] = {"export_features", |
1092 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1093 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1094 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1095 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1096 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1097 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1098 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1099 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1100 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
a2f999a3 | 1101 | [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, |
70c3b76c | 1102 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1103 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1104 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
5b8db00b | 1105 | [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, |
b084f598 | 1106 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 | 1107 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
b084f598 | 1108 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
1da177e4 LT |
1109 | #ifdef CONFIG_NFSD_V4 |
1110 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1111 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1112 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1113 | #endif |
1114 | /* last one */ {""} | |
1115 | }; | |
11f77942 SK |
1116 | struct net *net = data; |
1117 | int ret; | |
1118 | ||
1119 | ret = simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1120 | if (ret) | |
1121 | return ret; | |
1122 | sb->s_fs_info = get_net(net); | |
1123 | return 0; | |
1da177e4 LT |
1124 | } |
1125 | ||
fc14f2fe AV |
1126 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, |
1127 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1128 | { |
11f77942 SK |
1129 | return mount_ns(fs_type, flags, current->nsproxy->net_ns, nfsd_fill_super); |
1130 | } | |
1131 | ||
1132 | static void nfsd_umount(struct super_block *sb) | |
1133 | { | |
1134 | struct net *net = sb->s_fs_info; | |
1135 | ||
1136 | kill_litter_super(sb); | |
1137 | put_net(net); | |
1da177e4 LT |
1138 | } |
1139 | ||
1140 | static struct file_system_type nfsd_fs_type = { | |
1141 | .owner = THIS_MODULE, | |
1142 | .name = "nfsd", | |
fc14f2fe | 1143 | .mount = nfsd_mount, |
11f77942 | 1144 | .kill_sb = nfsd_umount, |
1da177e4 | 1145 | }; |
7f78e035 | 1146 | MODULE_ALIAS_FS("nfsd"); |
1da177e4 | 1147 | |
e331f606 BF |
1148 | #ifdef CONFIG_PROC_FS |
1149 | static int create_proc_exports_entry(void) | |
1150 | { | |
1151 | struct proc_dir_entry *entry; | |
1152 | ||
1153 | entry = proc_mkdir("fs/nfs", NULL); | |
1154 | if (!entry) | |
1155 | return -ENOMEM; | |
96d851c4 SK |
1156 | entry = proc_create("exports", 0, entry, |
1157 | &exports_proc_operations); | |
ff7c4b36 | 1158 | if (!entry) { |
1159 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1160 | return -ENOMEM; |
ff7c4b36 | 1161 | } |
e331f606 BF |
1162 | return 0; |
1163 | } | |
1164 | #else /* CONFIG_PROC_FS */ | |
1165 | static int create_proc_exports_entry(void) | |
1166 | { | |
1167 | return 0; | |
1168 | } | |
1169 | #endif | |
1170 | ||
7ea34ac1 | 1171 | int nfsd_net_id; |
5717e012 SK |
1172 | |
1173 | static __net_init int nfsd_init_net(struct net *net) | |
1174 | { | |
1175 | int retval; | |
3d733711 | 1176 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5717e012 SK |
1177 | |
1178 | retval = nfsd_export_init(net); | |
1179 | if (retval) | |
1180 | goto out_export_error; | |
f69adb2f SK |
1181 | retval = nfsd_idmap_init(net); |
1182 | if (retval) | |
1183 | goto out_idmap_error; | |
3d733711 | 1184 | nn->nfsd4_lease = 90; /* default lease time */ |
5284b44e | 1185 | nn->nfsd4_grace = 90; |
5717e012 SK |
1186 | return 0; |
1187 | ||
f69adb2f SK |
1188 | out_idmap_error: |
1189 | nfsd_export_shutdown(net); | |
5717e012 SK |
1190 | out_export_error: |
1191 | return retval; | |
1192 | } | |
1193 | ||
1194 | static __net_exit void nfsd_exit_net(struct net *net) | |
1195 | { | |
f69adb2f | 1196 | nfsd_idmap_shutdown(net); |
5717e012 SK |
1197 | nfsd_export_shutdown(net); |
1198 | } | |
1199 | ||
7ea34ac1 | 1200 | static struct pernet_operations nfsd_net_ops = { |
5717e012 SK |
1201 | .init = nfsd_init_net, |
1202 | .exit = nfsd_exit_net, | |
7ea34ac1 JL |
1203 | .id = &nfsd_net_id, |
1204 | .size = sizeof(struct nfsd_net), | |
1205 | }; | |
1206 | ||
1da177e4 LT |
1207 | static int __init init_nfsd(void) |
1208 | { | |
1209 | int retval; | |
1210 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1211 | ||
797a9d79 | 1212 | retval = register_cld_notifier(); |
813fd320 JL |
1213 | if (retval) |
1214 | return retval; | |
7ea34ac1 JL |
1215 | retval = register_pernet_subsys(&nfsd_net_ops); |
1216 | if (retval < 0) | |
813fd320 | 1217 | goto out_unregister_notifier; |
72083396 | 1218 | retval = nfsd4_init_slabs(); |
e8ff2a84 | 1219 | if (retval) |
7ea34ac1 | 1220 | goto out_unregister_pernet; |
65178db4 BS |
1221 | retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ |
1222 | if (retval) | |
1223 | goto out_free_slabs; | |
1da177e4 | 1224 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1225 | retval = nfsd_reply_cache_init(); |
1226 | if (retval) | |
1227 | goto out_free_stat; | |
1da177e4 | 1228 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
e331f606 BF |
1229 | retval = create_proc_exports_entry(); |
1230 | if (retval) | |
f69adb2f | 1231 | goto out_free_lockd; |
1da177e4 | 1232 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1233 | if (retval) |
1234 | goto out_free_all; | |
1235 | return 0; | |
1236 | out_free_all: | |
26808d3f BF |
1237 | remove_proc_entry("fs/nfs/exports", NULL); |
1238 | remove_proc_entry("fs/nfs", NULL); | |
dbf847ec | 1239 | out_free_lockd: |
26808d3f | 1240 | nfsd_lockd_shutdown(); |
e331f606 | 1241 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1242 | out_free_stat: |
1243 | nfsd_stat_shutdown(); | |
65178db4 BS |
1244 | nfsd_fault_inject_cleanup(); |
1245 | out_free_slabs: | |
26808d3f | 1246 | nfsd4_free_slabs(); |
7ea34ac1 JL |
1247 | out_unregister_pernet: |
1248 | unregister_pernet_subsys(&nfsd_net_ops); | |
813fd320 | 1249 | out_unregister_notifier: |
797a9d79 | 1250 | unregister_cld_notifier(); |
1da177e4 LT |
1251 | return retval; |
1252 | } | |
1253 | ||
1254 | static void __exit exit_nfsd(void) | |
1255 | { | |
d5c3428b | 1256 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1257 | remove_proc_entry("fs/nfs/exports", NULL); |
1258 | remove_proc_entry("fs/nfs", NULL); | |
1259 | nfsd_stat_shutdown(); | |
1260 | nfsd_lockd_shutdown(); | |
e8ff2a84 | 1261 | nfsd4_free_slabs(); |
65178db4 | 1262 | nfsd_fault_inject_cleanup(); |
1da177e4 | 1263 | unregister_filesystem(&nfsd_fs_type); |
7ea34ac1 | 1264 | unregister_pernet_subsys(&nfsd_net_ops); |
797a9d79 | 1265 | unregister_cld_notifier(); |
1da177e4 LT |
1266 | } |
1267 | ||
1268 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1269 | MODULE_LICENSE("GPL"); | |
1270 | module_init(init_nfsd) | |
1271 | module_exit(exit_nfsd) |