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, |
7f5ef2e9 | 52 | NFSD_V4EndGrace, |
70c3b76c | 53 | #endif |
1da177e4 LT |
54 | }; |
55 | ||
56 | /* | |
57 | * write() for these nodes. | |
58 | */ | |
1da177e4 | 59 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
60 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
61 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 62 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 63 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 64 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 65 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 66 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
5b8db00b | 67 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size); |
70c3b76c | 68 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 69 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 70 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 71 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
7f5ef2e9 | 72 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); |
70c3b76c | 73 | #endif |
1da177e4 LT |
74 | |
75 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
1da177e4 | 76 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
77 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
78 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 79 | [NFSD_Threads] = write_threads, |
eed2965a | 80 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 81 | [NFSD_Versions] = write_versions, |
80212d59 | 82 | [NFSD_Ports] = write_ports, |
596bbe53 | 83 | [NFSD_MaxBlkSize] = write_maxblksize, |
5b8db00b | 84 | [NFSD_MaxConnections] = write_maxconn, |
70c3b76c | 85 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 86 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 87 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 88 | [NFSD_RecoveryDir] = write_recoverydir, |
7f5ef2e9 | 89 | [NFSD_V4EndGrace] = write_v4_end_grace, |
70c3b76c | 90 | #endif |
1da177e4 LT |
91 | }; |
92 | ||
93 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
94 | { | |
496ad9aa | 95 | ino_t ino = file_inode(file)->i_ino; |
1da177e4 LT |
96 | char *data; |
97 | ssize_t rv; | |
98 | ||
e8c96f8c | 99 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
100 | return -EINVAL; |
101 | ||
102 | data = simple_transaction_get(file, buf, size); | |
103 | if (IS_ERR(data)) | |
104 | return PTR_ERR(data); | |
105 | ||
106 | rv = write_op[ino](file, data, size); | |
8971a101 | 107 | if (rv >= 0) { |
1da177e4 LT |
108 | simple_transaction_set(file, rv); |
109 | rv = size; | |
110 | } | |
111 | return rv; | |
112 | } | |
113 | ||
7390022d N |
114 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
115 | { | |
116 | if (! file->private_data) { | |
117 | /* An attempt to read a transaction file without writing | |
118 | * causes a 0-byte write so that the file can return | |
119 | * state information | |
120 | */ | |
121 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
122 | if (rv < 0) | |
123 | return rv; | |
124 | } | |
125 | return simple_transaction_read(file, buf, size, pos); | |
126 | } | |
127 | ||
4b6f5d20 | 128 | static const struct file_operations transaction_ops = { |
1da177e4 | 129 | .write = nfsctl_transaction_write, |
7390022d | 130 | .read = nfsctl_transaction_read, |
1da177e4 | 131 | .release = simple_transaction_release, |
6038f373 | 132 | .llseek = default_llseek, |
1da177e4 LT |
133 | }; |
134 | ||
96d851c4 | 135 | static int exports_net_open(struct net *net, struct file *file) |
1da177e4 | 136 | { |
f2c7ea10 SK |
137 | int err; |
138 | struct seq_file *seq; | |
96d851c4 | 139 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
f2c7ea10 SK |
140 | |
141 | err = seq_open(file, &nfs_exports_op); | |
142 | if (err) | |
143 | return err; | |
144 | ||
145 | seq = file->private_data; | |
e5f06f72 | 146 | seq->private = nn->svc_export_cache; |
f2c7ea10 | 147 | return 0; |
1da177e4 LT |
148 | } |
149 | ||
96d851c4 SK |
150 | static int exports_proc_open(struct inode *inode, struct file *file) |
151 | { | |
152 | return exports_net_open(current->nsproxy->net_ns, file); | |
153 | } | |
154 | ||
155 | static const struct file_operations exports_proc_operations = { | |
156 | .open = exports_proc_open, | |
157 | .read = seq_read, | |
158 | .llseek = seq_lseek, | |
159 | .release = seq_release, | |
160 | .owner = THIS_MODULE, | |
161 | }; | |
162 | ||
163 | static int exports_nfsd_open(struct inode *inode, struct file *file) | |
164 | { | |
165 | return exports_net_open(inode->i_sb->s_fs_info, file); | |
166 | } | |
167 | ||
168 | static const struct file_operations exports_nfsd_operations = { | |
169 | .open = exports_nfsd_open, | |
1da177e4 LT |
170 | .read = seq_read, |
171 | .llseek = seq_lseek, | |
172 | .release = seq_release, | |
9ef2db26 | 173 | .owner = THIS_MODULE, |
1da177e4 LT |
174 | }; |
175 | ||
e8e8753f BF |
176 | static int export_features_show(struct seq_file *m, void *v) |
177 | { | |
178 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static int export_features_open(struct inode *inode, struct file *file) | |
183 | { | |
184 | return single_open(file, export_features_show, NULL); | |
185 | } | |
186 | ||
75ef9de1 | 187 | static const struct file_operations export_features_operations = { |
e8e8753f BF |
188 | .open = export_features_open, |
189 | .read = seq_read, | |
190 | .llseek = seq_lseek, | |
191 | .release = single_release, | |
192 | }; | |
193 | ||
b084f598 | 194 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 KC |
195 | static int supported_enctypes_show(struct seq_file *m, void *v) |
196 | { | |
b084f598 | 197 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); |
b0b0c0a2 KC |
198 | return 0; |
199 | } | |
200 | ||
201 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
202 | { | |
203 | return single_open(file, supported_enctypes_show, NULL); | |
204 | } | |
205 | ||
75ef9de1 | 206 | static const struct file_operations supported_enctypes_ops = { |
b0b0c0a2 KC |
207 | .open = supported_enctypes_open, |
208 | .read = seq_read, | |
209 | .llseek = seq_lseek, | |
210 | .release = single_release, | |
211 | }; | |
b084f598 | 212 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
b0b0c0a2 | 213 | |
828c0950 | 214 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
215 | .open = nfsd_pool_stats_open, |
216 | .read = seq_read, | |
217 | .llseek = seq_lseek, | |
ed2d8aed | 218 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
219 | .owner = THIS_MODULE, |
220 | }; | |
221 | ||
a2f999a3 JL |
222 | static struct file_operations reply_cache_stats_operations = { |
223 | .open = nfsd_reply_cache_stats_open, | |
224 | .read = seq_read, | |
225 | .llseek = seq_lseek, | |
226 | .release = single_release, | |
227 | }; | |
228 | ||
1da177e4 LT |
229 | /*----------------------------------------------------------------------------*/ |
230 | /* | |
231 | * payload - write methods | |
1da177e4 LT |
232 | */ |
233 | ||
1da177e4 | 234 | |
262a0982 CL |
235 | /** |
236 | * write_unlock_ip - Release all locks used by a client | |
237 | * | |
238 | * Experimental. | |
239 | * | |
240 | * Input: | |
241 | * buf: '\n'-terminated C string containing a | |
4116092b | 242 | * presentation format IP address |
262a0982 CL |
243 | * size: length of C string in @buf |
244 | * Output: | |
245 | * On success: returns zero if all specified locks were released; | |
246 | * returns one if one or more locks were not released | |
247 | * On error: return code is negative errno value | |
262a0982 | 248 | */ |
b046ccdc | 249 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 250 | { |
4116092b CL |
251 | struct sockaddr_storage address; |
252 | struct sockaddr *sap = (struct sockaddr *)&address; | |
253 | size_t salen = sizeof(address); | |
367c8c7b | 254 | char *fo_path; |
11f77942 | 255 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
4373ea84 WC |
256 | |
257 | /* sanity check */ | |
258 | if (size == 0) | |
259 | return -EINVAL; | |
260 | ||
261 | if (buf[size-1] != '\n') | |
262 | return -EINVAL; | |
263 | ||
264 | fo_path = buf; | |
265 | if (qword_get(&buf, fo_path, size) < 0) | |
266 | return -EINVAL; | |
267 | ||
11f77942 | 268 | if (rpc_pton(net, fo_path, size, sap, salen) == 0) |
4373ea84 | 269 | return -EINVAL; |
4373ea84 | 270 | |
4116092b | 271 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
272 | } |
273 | ||
262a0982 CL |
274 | /** |
275 | * write_unlock_fs - Release all locks on a local file system | |
276 | * | |
277 | * Experimental. | |
278 | * | |
279 | * Input: | |
280 | * buf: '\n'-terminated C string containing the | |
281 | * absolute pathname of a local file system | |
282 | * size: length of C string in @buf | |
283 | * Output: | |
284 | * On success: returns zero if all specified locks were released; | |
285 | * returns one if one or more locks were not released | |
286 | * On error: return code is negative errno value | |
287 | */ | |
b046ccdc | 288 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 289 | { |
a63bb996 | 290 | struct path path; |
17efa372 WC |
291 | char *fo_path; |
292 | int error; | |
293 | ||
294 | /* sanity check */ | |
295 | if (size == 0) | |
296 | return -EINVAL; | |
297 | ||
298 | if (buf[size-1] != '\n') | |
299 | return -EINVAL; | |
300 | ||
301 | fo_path = buf; | |
302 | if (qword_get(&buf, fo_path, size) < 0) | |
303 | return -EINVAL; | |
304 | ||
a63bb996 | 305 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
306 | if (error) |
307 | return error; | |
308 | ||
262a0982 CL |
309 | /* |
310 | * XXX: Needs better sanity checking. Otherwise we could end up | |
311 | * releasing locks on the wrong file system. | |
312 | * | |
313 | * For example: | |
314 | * 1. Does the path refer to a directory? | |
315 | * 2. Is that directory a mount point, or | |
316 | * 3. Is that directory the root of an exported file system? | |
317 | */ | |
d8c9584e | 318 | error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); |
17efa372 | 319 | |
a63bb996 | 320 | path_put(&path); |
17efa372 WC |
321 | return error; |
322 | } | |
323 | ||
262a0982 CL |
324 | /** |
325 | * write_filehandle - Get a variable-length NFS file handle by path | |
326 | * | |
327 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
328 | * three alphanumeric words separated by whitespace. The string may | |
329 | * contain escape sequences. | |
330 | * | |
331 | * Input: | |
332 | * buf: | |
333 | * domain: client domain name | |
334 | * path: export pathname | |
335 | * maxsize: numeric maximum size of | |
336 | * @buf | |
337 | * size: length of C string in @buf | |
338 | * Output: | |
339 | * On success: passed-in buffer filled with '\n'-terminated C | |
340 | * string containing a ASCII hex text version | |
341 | * of the NFS file handle; | |
342 | * return code is the size in bytes of the string | |
343 | * On error: return code is negative errno value | |
344 | */ | |
1da177e4 LT |
345 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
346 | { | |
1da177e4 | 347 | char *dname, *path; |
246d95ba | 348 | int uninitialized_var(maxsize); |
1da177e4 LT |
349 | char *mesg = buf; |
350 | int len; | |
351 | struct auth_domain *dom; | |
352 | struct knfsd_fh fh; | |
11f77942 | 353 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
1da177e4 | 354 | |
87d26ea7 BF |
355 | if (size == 0) |
356 | return -EINVAL; | |
357 | ||
1da177e4 LT |
358 | if (buf[size-1] != '\n') |
359 | return -EINVAL; | |
360 | buf[size-1] = 0; | |
361 | ||
362 | dname = mesg; | |
363 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
364 | if (len <= 0) |
365 | return -EINVAL; | |
1da177e4 LT |
366 | |
367 | path = dname+len+1; | |
368 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
369 | if (len <= 0) |
370 | return -EINVAL; | |
1da177e4 LT |
371 | |
372 | len = get_int(&mesg, &maxsize); | |
373 | if (len) | |
374 | return len; | |
375 | ||
376 | if (maxsize < NFS_FHSIZE) | |
377 | return -EINVAL; | |
3c7aa15d | 378 | maxsize = min(maxsize, NFS3_FHSIZE); |
1da177e4 LT |
379 | |
380 | if (qword_get(&mesg, mesg, size)>0) | |
381 | return -EINVAL; | |
382 | ||
383 | /* we have all the words, they are in buf.. */ | |
384 | dom = unix_domain_find(dname); | |
385 | if (!dom) | |
386 | return -ENOMEM; | |
387 | ||
11f77942 | 388 | len = exp_rootfh(net, dom, path, &fh, maxsize); |
1da177e4 LT |
389 | auth_domain_put(dom); |
390 | if (len) | |
391 | return len; | |
392 | ||
54224f04 CL |
393 | mesg = buf; |
394 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
395 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
396 | mesg[-1] = '\n'; | |
397 | return mesg - buf; | |
398 | } | |
399 | ||
262a0982 CL |
400 | /** |
401 | * write_threads - Start NFSD, or report the current number of running threads | |
402 | * | |
403 | * Input: | |
404 | * buf: ignored | |
405 | * size: zero | |
406 | * Output: | |
407 | * On success: passed-in buffer filled with '\n'-terminated C | |
408 | * string numeric value representing the number of | |
409 | * running NFSD threads; | |
410 | * return code is the size in bytes of the string | |
411 | * On error: return code is zero | |
412 | * | |
413 | * OR | |
414 | * | |
415 | * Input: | |
416 | * buf: C string containing an unsigned | |
417 | * integer value representing the | |
418 | * number of NFSD threads to start | |
419 | * size: non-zero length of C string in @buf | |
420 | * Output: | |
421 | * On success: NFS service is started; | |
422 | * passed-in buffer filled with '\n'-terminated C | |
423 | * string numeric value representing the number of | |
424 | * running NFSD threads; | |
425 | * return code is the size in bytes of the string | |
426 | * On error: return code is zero or a negative errno value | |
427 | */ | |
1da177e4 LT |
428 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
429 | { | |
1da177e4 LT |
430 | char *mesg = buf; |
431 | int rv; | |
11f77942 | 432 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
d41a9417 | 433 | |
1da177e4 LT |
434 | if (size > 0) { |
435 | int newthreads; | |
436 | rv = get_int(&mesg, &newthreads); | |
437 | if (rv) | |
438 | return rv; | |
9e074856 | 439 | if (newthreads < 0) |
1da177e4 | 440 | return -EINVAL; |
d41a9417 | 441 | rv = nfsd_svc(newthreads, net); |
82e12fe9 | 442 | if (rv < 0) |
1da177e4 | 443 | return rv; |
82e12fe9 | 444 | } else |
9dd9845f | 445 | rv = nfsd_nrthreads(net); |
e06b6405 | 446 | |
82e12fe9 | 447 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
448 | } |
449 | ||
262a0982 CL |
450 | /** |
451 | * write_pool_threads - Set or report the current number of threads per pool | |
452 | * | |
453 | * Input: | |
454 | * buf: ignored | |
455 | * size: zero | |
456 | * | |
457 | * OR | |
458 | * | |
459 | * Input: | |
460 | * buf: C string containing whitespace- | |
461 | * separated unsigned integer values | |
462 | * representing the number of NFSD | |
463 | * threads to start in each pool | |
464 | * size: non-zero length of C string in @buf | |
465 | * Output: | |
466 | * On success: passed-in buffer filled with '\n'-terminated C | |
467 | * string containing integer values representing the | |
468 | * number of NFSD threads in each pool; | |
469 | * return code is the size in bytes of the string | |
470 | * On error: return code is zero or a negative errno value | |
471 | */ | |
eed2965a GB |
472 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
473 | { | |
474 | /* if size > 0, look for an array of number of threads per node | |
475 | * and apply them then write out number of threads per node as reply | |
476 | */ | |
477 | char *mesg = buf; | |
478 | int i; | |
479 | int rv; | |
480 | int len; | |
bedbdd8b | 481 | int npools; |
eed2965a | 482 | int *nthreads; |
11f77942 | 483 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
eed2965a | 484 | |
bedbdd8b | 485 | mutex_lock(&nfsd_mutex); |
9dd9845f | 486 | npools = nfsd_nrpools(net); |
eed2965a GB |
487 | if (npools == 0) { |
488 | /* | |
489 | * NFS is shut down. The admin can start it by | |
490 | * writing to the threads file but NOT the pool_threads | |
491 | * file, sorry. Report zero threads. | |
492 | */ | |
bedbdd8b | 493 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
494 | strcpy(buf, "0\n"); |
495 | return strlen(buf); | |
496 | } | |
497 | ||
498 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 499 | rv = -ENOMEM; |
eed2965a | 500 | if (nthreads == NULL) |
bedbdd8b | 501 | goto out_free; |
eed2965a GB |
502 | |
503 | if (size > 0) { | |
504 | for (i = 0; i < npools; i++) { | |
505 | rv = get_int(&mesg, &nthreads[i]); | |
506 | if (rv == -ENOENT) | |
507 | break; /* fewer numbers than pools */ | |
508 | if (rv) | |
509 | goto out_free; /* syntax error */ | |
510 | rv = -EINVAL; | |
511 | if (nthreads[i] < 0) | |
512 | goto out_free; | |
513 | } | |
3938a0d5 | 514 | rv = nfsd_set_nrthreads(i, nthreads, net); |
eed2965a GB |
515 | if (rv) |
516 | goto out_free; | |
517 | } | |
518 | ||
9dd9845f | 519 | rv = nfsd_get_nrthreads(npools, nthreads, net); |
eed2965a GB |
520 | if (rv) |
521 | goto out_free; | |
522 | ||
523 | mesg = buf; | |
524 | size = SIMPLE_TRANSACTION_LIMIT; | |
525 | for (i = 0; i < npools && size > 0; i++) { | |
526 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
527 | len = strlen(mesg); | |
528 | size -= len; | |
529 | mesg += len; | |
530 | } | |
413d63d7 | 531 | rv = mesg - buf; |
eed2965a GB |
532 | out_free: |
533 | kfree(nthreads); | |
bedbdd8b | 534 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
535 | return rv; |
536 | } | |
537 | ||
3dd98a3b | 538 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 539 | { |
70c3b76c | 540 | char *mesg = buf; |
8daf220a | 541 | char *vers, *minorp, sign; |
261758b5 | 542 | int len, num, remaining; |
8daf220a | 543 | unsigned minor; |
70c3b76c N |
544 | ssize_t tlen = 0; |
545 | char *sep; | |
11f77942 | 546 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
9dd9845f | 547 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
70c3b76c N |
548 | |
549 | if (size>0) { | |
9dd9845f | 550 | if (nn->nfsd_serv) |
6658d3a7 | 551 | /* Cannot change versions without updating |
9dd9845f | 552 | * nn->nfsd_serv->sv_xdrsize, and reallocing |
6658d3a7 N |
553 | * rq_argp and rq_resp |
554 | */ | |
70c3b76c N |
555 | return -EBUSY; |
556 | if (buf[size-1] != '\n') | |
557 | return -EINVAL; | |
558 | buf[size-1] = 0; | |
559 | ||
560 | vers = mesg; | |
561 | len = qword_get(&mesg, vers, size); | |
562 | if (len <= 0) return -EINVAL; | |
563 | do { | |
564 | sign = *vers; | |
565 | if (sign == '+' || sign == '-') | |
8daf220a | 566 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 567 | else |
8daf220a BH |
568 | num = simple_strtol(vers, &minorp, 0); |
569 | if (*minorp == '.') { | |
ff89be87 | 570 | if (num != 4) |
8daf220a BH |
571 | return -EINVAL; |
572 | minor = simple_strtoul(minorp+1, NULL, 0); | |
573 | if (minor == 0) | |
574 | return -EINVAL; | |
575 | if (nfsd_minorversion(minor, sign == '-' ? | |
576 | NFSD_CLEAR : NFSD_SET) < 0) | |
577 | return -EINVAL; | |
578 | goto next; | |
579 | } | |
70c3b76c N |
580 | switch(num) { |
581 | case 2: | |
582 | case 3: | |
583 | case 4: | |
6658d3a7 | 584 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
585 | break; |
586 | default: | |
587 | return -EINVAL; | |
588 | } | |
8daf220a | 589 | next: |
70c3b76c | 590 | vers += len + 1; |
70c3b76c N |
591 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
592 | /* If all get turned off, turn them back on, as | |
593 | * having no versions is BAD | |
594 | */ | |
6658d3a7 | 595 | nfsd_reset_versions(); |
70c3b76c | 596 | } |
261758b5 | 597 | |
70c3b76c N |
598 | /* Now write current state into reply buffer */ |
599 | len = 0; | |
600 | sep = ""; | |
261758b5 | 601 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 602 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 603 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 604 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 605 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
606 | num); |
607 | sep = " "; | |
261758b5 CL |
608 | |
609 | if (len > remaining) | |
610 | break; | |
611 | remaining -= len; | |
612 | buf += len; | |
613 | tlen += len; | |
70c3b76c | 614 | } |
8daf220a | 615 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
616 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
617 | minor++) { | |
618 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
619 | (nfsd_vers(4, NFSD_TEST) && |
620 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
621 | '+' : '-', | |
622 | minor); | |
261758b5 CL |
623 | |
624 | if (len > remaining) | |
625 | break; | |
626 | remaining -= len; | |
627 | buf += len; | |
628 | tlen += len; | |
629 | } | |
630 | ||
631 | len = snprintf(buf, remaining, "\n"); | |
632 | if (len > remaining) | |
633 | return -EINVAL; | |
634 | return tlen + len; | |
70c3b76c N |
635 | } |
636 | ||
262a0982 CL |
637 | /** |
638 | * write_versions - Set or report the available NFS protocol versions | |
639 | * | |
640 | * Input: | |
641 | * buf: ignored | |
642 | * size: zero | |
643 | * Output: | |
644 | * On success: passed-in buffer filled with '\n'-terminated C | |
645 | * string containing positive or negative integer | |
646 | * values representing the current status of each | |
647 | * protocol version; | |
648 | * return code is the size in bytes of the string | |
649 | * On error: return code is zero or a negative errno value | |
650 | * | |
651 | * OR | |
652 | * | |
653 | * Input: | |
654 | * buf: C string containing whitespace- | |
655 | * separated positive or negative | |
656 | * integer values representing NFS | |
657 | * protocol versions to enable ("+n") | |
658 | * or disable ("-n") | |
659 | * size: non-zero length of C string in @buf | |
660 | * Output: | |
661 | * On success: status of zero or more protocol versions has | |
662 | * been updated; passed-in buffer filled with | |
663 | * '\n'-terminated C string containing positive | |
664 | * or negative integer values representing the | |
665 | * current status of each protocol version; | |
666 | * return code is the size in bytes of the string | |
667 | * On error: return code is zero or a negative errno value | |
668 | */ | |
3dd98a3b JL |
669 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
670 | { | |
671 | ssize_t rv; | |
672 | ||
673 | mutex_lock(&nfsd_mutex); | |
674 | rv = __write_versions(file, buf, size); | |
675 | mutex_unlock(&nfsd_mutex); | |
676 | return rv; | |
677 | } | |
678 | ||
0a5372d8 CL |
679 | /* |
680 | * Zero-length write. Return a list of NFSD's current listener | |
681 | * transports. | |
682 | */ | |
9dd9845f | 683 | static ssize_t __write_ports_names(char *buf, struct net *net) |
0a5372d8 | 684 | { |
9dd9845f SK |
685 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
686 | ||
687 | if (nn->nfsd_serv == NULL) | |
0a5372d8 | 688 | return 0; |
9dd9845f | 689 | return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
690 | } |
691 | ||
0b7c2f6f CL |
692 | /* |
693 | * A single 'fd' number was written, in which case it must be for | |
694 | * a socket of a supported family/protocol, and we use it as an | |
695 | * nfsd listener. | |
696 | */ | |
08160352 | 697 | static ssize_t __write_ports_addfd(char *buf, struct net *net) |
0b7c2f6f CL |
698 | { |
699 | char *mesg = buf; | |
700 | int fd, err; | |
9dd9845f | 701 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
0b7c2f6f CL |
702 | |
703 | err = get_int(&mesg, &fd); | |
704 | if (err != 0 || fd < 0) | |
705 | return -EINVAL; | |
706 | ||
30646394 SK |
707 | if (svc_alien_sock(net, fd)) { |
708 | printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); | |
709 | return -EINVAL; | |
710 | } | |
711 | ||
6777436b | 712 | err = nfsd_create_serv(net); |
0b7c2f6f CL |
713 | if (err != 0) |
714 | return err; | |
715 | ||
9dd9845f | 716 | err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
78a8d7c8 | 717 | if (err < 0) { |
19f7e2ca | 718 | nfsd_destroy(net); |
78a8d7c8 JL |
719 | return err; |
720 | } | |
0b7c2f6f | 721 | |
ea068bad | 722 | /* Decrease the count, but don't shut down the service */ |
9dd9845f | 723 | nn->nfsd_serv->sv_nrthreads--; |
ea068bad | 724 | return err; |
0b7c2f6f CL |
725 | } |
726 | ||
4eb68c26 CL |
727 | /* |
728 | * A transport listener is added by writing it's transport name and | |
729 | * a port number. | |
730 | */ | |
08160352 | 731 | static ssize_t __write_ports_addxprt(char *buf, struct net *net) |
4eb68c26 CL |
732 | { |
733 | char transport[16]; | |
37498292 | 734 | struct svc_xprt *xprt; |
4eb68c26 | 735 | int port, err; |
9dd9845f | 736 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
4eb68c26 | 737 | |
a10fded1 | 738 | if (sscanf(buf, "%15s %5u", transport, &port) != 2) |
4eb68c26 CL |
739 | return -EINVAL; |
740 | ||
4be929be | 741 | if (port < 1 || port > USHRT_MAX) |
4eb68c26 CL |
742 | return -EINVAL; |
743 | ||
6777436b | 744 | err = nfsd_create_serv(net); |
4eb68c26 CL |
745 | if (err != 0) |
746 | return err; | |
747 | ||
9dd9845f | 748 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
4eb68c26 | 749 | PF_INET, port, SVC_SOCK_ANONYMOUS); |
68717908 | 750 | if (err < 0) |
37498292 CL |
751 | goto out_err; |
752 | ||
9dd9845f | 753 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
37498292 CL |
754 | PF_INET6, port, SVC_SOCK_ANONYMOUS); |
755 | if (err < 0 && err != -EAFNOSUPPORT) | |
756 | goto out_close; | |
0cd14a06 JL |
757 | |
758 | /* Decrease the count, but don't shut down the service */ | |
9dd9845f | 759 | nn->nfsd_serv->sv_nrthreads--; |
4eb68c26 | 760 | return 0; |
37498292 | 761 | out_close: |
9dd9845f | 762 | xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); |
37498292 CL |
763 | if (xprt != NULL) { |
764 | svc_close_xprt(xprt); | |
765 | svc_xprt_put(xprt); | |
766 | } | |
767 | out_err: | |
19f7e2ca | 768 | nfsd_destroy(net); |
37498292 | 769 | return err; |
4eb68c26 CL |
770 | } |
771 | ||
08160352 SK |
772 | static ssize_t __write_ports(struct file *file, char *buf, size_t size, |
773 | struct net *net) | |
80212d59 | 774 | { |
0a5372d8 | 775 | if (size == 0) |
9dd9845f | 776 | return __write_ports_names(buf, net); |
0b7c2f6f CL |
777 | |
778 | if (isdigit(buf[0])) | |
08160352 | 779 | return __write_ports_addfd(buf, net); |
82d56591 | 780 | |
4eb68c26 | 781 | if (isalpha(buf[0])) |
08160352 | 782 | return __write_ports_addxprt(buf, net); |
4cd5dc75 | 783 | |
b41b66d6 | 784 | return -EINVAL; |
80212d59 N |
785 | } |
786 | ||
262a0982 CL |
787 | /** |
788 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
789 | * | |
790 | * Input: | |
791 | * buf: ignored | |
792 | * size: zero | |
793 | * Output: | |
794 | * On success: passed-in buffer filled with a '\n'-terminated C | |
795 | * string containing a whitespace-separated list of | |
796 | * named NFSD listeners; | |
797 | * return code is the size in bytes of the string | |
798 | * On error: return code is zero or a negative errno value | |
799 | * | |
800 | * OR | |
801 | * | |
802 | * Input: | |
803 | * buf: C string containing an unsigned | |
804 | * integer value representing a bound | |
805 | * but unconnected socket that is to be | |
c71206a7 CL |
806 | * used as an NFSD listener; listen(3) |
807 | * must be called for a SOCK_STREAM | |
808 | * socket, otherwise it is ignored | |
262a0982 CL |
809 | * size: non-zero length of C string in @buf |
810 | * Output: | |
811 | * On success: NFS service is started; | |
812 | * passed-in buffer filled with a '\n'-terminated C | |
813 | * string containing a unique alphanumeric name of | |
814 | * the listener; | |
815 | * return code is the size in bytes of the string | |
816 | * On error: return code is a negative errno value | |
817 | * | |
818 | * OR | |
819 | * | |
820 | * Input: | |
262a0982 CL |
821 | * buf: C string containing a transport |
822 | * name and an unsigned integer value | |
823 | * representing the port to listen on, | |
824 | * separated by whitespace | |
825 | * size: non-zero length of C string in @buf | |
826 | * Output: | |
827 | * On success: returns zero; NFS service is started | |
828 | * On error: return code is a negative errno value | |
262a0982 | 829 | */ |
bedbdd8b NB |
830 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
831 | { | |
832 | ssize_t rv; | |
11f77942 | 833 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
3dd98a3b | 834 | |
bedbdd8b | 835 | mutex_lock(&nfsd_mutex); |
08160352 | 836 | rv = __write_ports(file, buf, size, net); |
bedbdd8b NB |
837 | mutex_unlock(&nfsd_mutex); |
838 | return rv; | |
839 | } | |
840 | ||
841 | ||
596bbe53 N |
842 | int nfsd_max_blksize; |
843 | ||
262a0982 CL |
844 | /** |
845 | * write_maxblksize - Set or report the current NFS blksize | |
846 | * | |
847 | * Input: | |
848 | * buf: ignored | |
849 | * size: zero | |
850 | * | |
851 | * OR | |
852 | * | |
853 | * Input: | |
854 | * buf: C string containing an unsigned | |
855 | * integer value representing the new | |
856 | * NFS blksize | |
857 | * size: non-zero length of C string in @buf | |
858 | * Output: | |
859 | * On success: passed-in buffer filled with '\n'-terminated C string | |
860 | * containing numeric value of the current NFS blksize | |
861 | * setting; | |
862 | * return code is the size in bytes of the string | |
863 | * On error: return code is zero or a negative errno value | |
864 | */ | |
596bbe53 N |
865 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
866 | { | |
867 | char *mesg = buf; | |
11f77942 | 868 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
9dd9845f SK |
869 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
870 | ||
596bbe53 N |
871 | if (size > 0) { |
872 | int bsize; | |
873 | int rv = get_int(&mesg, &bsize); | |
874 | if (rv) | |
875 | return rv; | |
876 | /* force bsize into allowed range and | |
877 | * required alignment. | |
878 | */ | |
3c7aa15d KM |
879 | bsize = max_t(int, bsize, 1024); |
880 | bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); | |
596bbe53 | 881 | bsize &= ~(1024-1); |
bedbdd8b | 882 | mutex_lock(&nfsd_mutex); |
9dd9845f | 883 | if (nn->nfsd_serv) { |
bedbdd8b | 884 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
885 | return -EBUSY; |
886 | } | |
887 | nfsd_max_blksize = bsize; | |
bedbdd8b | 888 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 889 | } |
e06b6405 CL |
890 | |
891 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
892 | nfsd_max_blksize); | |
596bbe53 N |
893 | } |
894 | ||
5b8db00b JL |
895 | /** |
896 | * write_maxconn - Set or report the current max number of connections | |
897 | * | |
898 | * Input: | |
899 | * buf: ignored | |
900 | * size: zero | |
901 | * OR | |
902 | * | |
903 | * Input: | |
904 | * buf: C string containing an unsigned | |
905 | * integer value representing the new | |
906 | * number of max connections | |
907 | * size: non-zero length of C string in @buf | |
908 | * Output: | |
909 | * On success: passed-in buffer filled with '\n'-terminated C string | |
910 | * containing numeric value of max_connections setting | |
911 | * for this net namespace; | |
912 | * return code is the size in bytes of the string | |
913 | * On error: return code is zero or a negative errno value | |
914 | */ | |
915 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size) | |
916 | { | |
917 | char *mesg = buf; | |
918 | struct net *net = file->f_dentry->d_sb->s_fs_info; | |
919 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
920 | unsigned int maxconn = nn->max_connections; | |
921 | ||
922 | if (size > 0) { | |
923 | int rv = get_uint(&mesg, &maxconn); | |
924 | ||
925 | if (rv) | |
926 | return rv; | |
927 | nn->max_connections = maxconn; | |
928 | } | |
929 | ||
930 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); | |
931 | } | |
932 | ||
70c3b76c | 933 | #ifdef CONFIG_NFSD_V4 |
9dd9845f SK |
934 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, |
935 | time_t *time, struct nfsd_net *nn) | |
1da177e4 | 936 | { |
1da177e4 | 937 | char *mesg = buf; |
f0135740 | 938 | int rv, i; |
1da177e4 LT |
939 | |
940 | if (size > 0) { | |
9dd9845f | 941 | if (nn->nfsd_serv) |
3dd98a3b | 942 | return -EBUSY; |
f0135740 | 943 | rv = get_int(&mesg, &i); |
1da177e4 LT |
944 | if (rv) |
945 | return rv; | |
e7b184f1 BF |
946 | /* |
947 | * Some sanity checking. We don't have a reason for | |
948 | * these particular numbers, but problems with the | |
949 | * extremes are: | |
950 | * - Too short: the briefest network outage may | |
951 | * cause clients to lose all their locks. Also, | |
952 | * the frequent polling may be wasteful. | |
953 | * - Too long: do you really want reboot recovery | |
954 | * to take more than an hour? Or to make other | |
955 | * clients wait an hour before being able to | |
956 | * revoke a dead client's locks? | |
957 | */ | |
f0135740 | 958 | if (i < 10 || i > 3600) |
1da177e4 | 959 | return -EINVAL; |
f0135740 | 960 | *time = i; |
1da177e4 | 961 | } |
e06b6405 | 962 | |
f0135740 BF |
963 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); |
964 | } | |
965 | ||
9dd9845f SK |
966 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, |
967 | time_t *time, struct nfsd_net *nn) | |
f0135740 BF |
968 | { |
969 | ssize_t rv; | |
970 | ||
971 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 972 | rv = __nfsd4_write_time(file, buf, size, time, nn); |
f0135740 BF |
973 | mutex_unlock(&nfsd_mutex); |
974 | return rv; | |
1da177e4 LT |
975 | } |
976 | ||
262a0982 CL |
977 | /** |
978 | * write_leasetime - Set or report the current NFSv4 lease time | |
979 | * | |
980 | * Input: | |
981 | * buf: ignored | |
982 | * size: zero | |
983 | * | |
984 | * OR | |
985 | * | |
986 | * Input: | |
987 | * buf: C string containing an unsigned | |
988 | * integer value representing the new | |
989 | * NFSv4 lease expiry time | |
990 | * size: non-zero length of C string in @buf | |
991 | * Output: | |
992 | * On success: passed-in buffer filled with '\n'-terminated C | |
993 | * string containing unsigned integer value of the | |
994 | * current lease expiry time; | |
995 | * return code is the size in bytes of the string | |
996 | * On error: return code is zero or a negative errno value | |
997 | */ | |
3dd98a3b JL |
998 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
999 | { | |
11f77942 SK |
1000 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
1001 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
9dd9845f | 1002 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); |
3dd98a3b JL |
1003 | } |
1004 | ||
efc4bb4f BF |
1005 | /** |
1006 | * write_gracetime - Set or report current NFSv4 grace period time | |
1007 | * | |
1008 | * As above, but sets the time of the NFSv4 grace period. | |
1009 | * | |
1010 | * Note this should never be set to less than the *previous* | |
1011 | * lease-period time, but we don't try to enforce this. (In the common | |
1012 | * case (a new boot), we don't know what the previous lease time was | |
1013 | * anyway.) | |
1014 | */ | |
1015 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1016 | { | |
11f77942 SK |
1017 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
1018 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
9dd9845f | 1019 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); |
efc4bb4f BF |
1020 | } |
1021 | ||
9dd9845f SK |
1022 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, |
1023 | struct nfsd_net *nn) | |
0964a3d3 N |
1024 | { |
1025 | char *mesg = buf; | |
1026 | char *recdir; | |
1027 | int len, status; | |
1028 | ||
3dd98a3b | 1029 | if (size > 0) { |
9dd9845f | 1030 | if (nn->nfsd_serv) |
3dd98a3b JL |
1031 | return -EBUSY; |
1032 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1033 | return -EINVAL; | |
1034 | buf[size-1] = 0; | |
0964a3d3 | 1035 | |
3dd98a3b JL |
1036 | recdir = mesg; |
1037 | len = qword_get(&mesg, recdir, size); | |
1038 | if (len <= 0) | |
1039 | return -EINVAL; | |
0964a3d3 | 1040 | |
3dd98a3b | 1041 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1042 | if (status) |
1043 | return status; | |
3dd98a3b | 1044 | } |
3d72ab8f CL |
1045 | |
1046 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1047 | nfs4_recoverydir()); | |
0964a3d3 | 1048 | } |
3dd98a3b | 1049 | |
262a0982 CL |
1050 | /** |
1051 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1052 | * | |
1053 | * Input: | |
1054 | * buf: ignored | |
1055 | * size: zero | |
1056 | * | |
1057 | * OR | |
1058 | * | |
1059 | * Input: | |
1060 | * buf: C string containing the pathname | |
1061 | * of the directory on a local file | |
1062 | * system containing permanent NFSv4 | |
1063 | * recovery data | |
1064 | * size: non-zero length of C string in @buf | |
1065 | * Output: | |
1066 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1067 | * containing the current recovery pathname setting; | |
1068 | * return code is the size in bytes of the string | |
1069 | * On error: return code is zero or a negative errno value | |
1070 | */ | |
3dd98a3b JL |
1071 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1072 | { | |
1073 | ssize_t rv; | |
11f77942 SK |
1074 | struct net *net = file->f_dentry->d_sb->s_fs_info; |
1075 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
3dd98a3b JL |
1076 | |
1077 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 1078 | rv = __write_recoverydir(file, buf, size, nn); |
3dd98a3b JL |
1079 | mutex_unlock(&nfsd_mutex); |
1080 | return rv; | |
1081 | } | |
1082 | ||
7f5ef2e9 JL |
1083 | /** |
1084 | * write_v4_end_grace - release grace period for nfsd's v4.x lock manager | |
1085 | * | |
1086 | * Input: | |
1087 | * buf: ignored | |
1088 | * size: zero | |
1089 | * OR | |
1090 | * | |
1091 | * Input: | |
1092 | * buf: any value | |
1093 | * size: non-zero length of C string in @buf | |
1094 | * Output: | |
1095 | * passed-in buffer filled with "Y" or "N" with a newline | |
1096 | * and NULL-terminated C string. This indicates whether | |
1097 | * the grace period has ended in the current net | |
1098 | * namespace. Return code is the size in bytes of the | |
1099 | * string. Writing a string that starts with 'Y', 'y', or | |
1100 | * '1' to the file will end the grace period for nfsd's v4 | |
1101 | * lock manager. | |
1102 | */ | |
1103 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) | |
1104 | { | |
1105 | struct net *net = file->f_dentry->d_sb->s_fs_info; | |
1106 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); | |
1107 | ||
1108 | if (size > 0) { | |
1109 | switch(buf[0]) { | |
1110 | case 'Y': | |
1111 | case 'y': | |
1112 | case '1': | |
1113 | nfsd4_end_grace(nn); | |
1114 | break; | |
1115 | default: | |
1116 | return -EINVAL; | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", | |
1121 | nn->grace_ended ? 'Y' : 'N'); | |
1122 | } | |
1123 | ||
70c3b76c | 1124 | #endif |
0964a3d3 | 1125 | |
1da177e4 LT |
1126 | /*----------------------------------------------------------------------------*/ |
1127 | /* | |
1128 | * populating the filesystem. | |
1129 | */ | |
1130 | ||
1131 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1132 | { | |
1133 | static struct tree_descr nfsd_files[] = { | |
96d851c4 | 1134 | [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, |
e8e8753f BF |
1135 | [NFSD_Export_features] = {"export_features", |
1136 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1137 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1138 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1139 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1140 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1141 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1142 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1143 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1144 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
a2f999a3 | 1145 | [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, |
70c3b76c | 1146 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1147 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1148 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
5b8db00b | 1149 | [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, |
b084f598 | 1150 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 | 1151 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
b084f598 | 1152 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
1da177e4 LT |
1153 | #ifdef CONFIG_NFSD_V4 |
1154 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1155 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1156 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
7f5ef2e9 | 1157 | [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1158 | #endif |
1159 | /* last one */ {""} | |
1160 | }; | |
11f77942 SK |
1161 | struct net *net = data; |
1162 | int ret; | |
1163 | ||
1164 | ret = simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1165 | if (ret) | |
1166 | return ret; | |
1167 | sb->s_fs_info = get_net(net); | |
1168 | return 0; | |
1da177e4 LT |
1169 | } |
1170 | ||
fc14f2fe AV |
1171 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, |
1172 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1173 | { |
11f77942 SK |
1174 | return mount_ns(fs_type, flags, current->nsproxy->net_ns, nfsd_fill_super); |
1175 | } | |
1176 | ||
1177 | static void nfsd_umount(struct super_block *sb) | |
1178 | { | |
1179 | struct net *net = sb->s_fs_info; | |
1180 | ||
1181 | kill_litter_super(sb); | |
1182 | put_net(net); | |
1da177e4 LT |
1183 | } |
1184 | ||
1185 | static struct file_system_type nfsd_fs_type = { | |
1186 | .owner = THIS_MODULE, | |
1187 | .name = "nfsd", | |
fc14f2fe | 1188 | .mount = nfsd_mount, |
11f77942 | 1189 | .kill_sb = nfsd_umount, |
1da177e4 | 1190 | }; |
7f78e035 | 1191 | MODULE_ALIAS_FS("nfsd"); |
1da177e4 | 1192 | |
e331f606 BF |
1193 | #ifdef CONFIG_PROC_FS |
1194 | static int create_proc_exports_entry(void) | |
1195 | { | |
1196 | struct proc_dir_entry *entry; | |
1197 | ||
1198 | entry = proc_mkdir("fs/nfs", NULL); | |
1199 | if (!entry) | |
1200 | return -ENOMEM; | |
96d851c4 SK |
1201 | entry = proc_create("exports", 0, entry, |
1202 | &exports_proc_operations); | |
ff7c4b36 | 1203 | if (!entry) { |
1204 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1205 | return -ENOMEM; |
ff7c4b36 | 1206 | } |
e331f606 BF |
1207 | return 0; |
1208 | } | |
1209 | #else /* CONFIG_PROC_FS */ | |
1210 | static int create_proc_exports_entry(void) | |
1211 | { | |
1212 | return 0; | |
1213 | } | |
1214 | #endif | |
1215 | ||
7ea34ac1 | 1216 | int nfsd_net_id; |
5717e012 SK |
1217 | |
1218 | static __net_init int nfsd_init_net(struct net *net) | |
1219 | { | |
1220 | int retval; | |
3d733711 | 1221 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5717e012 SK |
1222 | |
1223 | retval = nfsd_export_init(net); | |
1224 | if (retval) | |
1225 | goto out_export_error; | |
f69adb2f SK |
1226 | retval = nfsd_idmap_init(net); |
1227 | if (retval) | |
1228 | goto out_idmap_error; | |
3d733711 | 1229 | nn->nfsd4_lease = 90; /* default lease time */ |
5284b44e | 1230 | nn->nfsd4_grace = 90; |
5717e012 SK |
1231 | return 0; |
1232 | ||
f69adb2f SK |
1233 | out_idmap_error: |
1234 | nfsd_export_shutdown(net); | |
5717e012 SK |
1235 | out_export_error: |
1236 | return retval; | |
1237 | } | |
1238 | ||
1239 | static __net_exit void nfsd_exit_net(struct net *net) | |
1240 | { | |
f69adb2f | 1241 | nfsd_idmap_shutdown(net); |
5717e012 SK |
1242 | nfsd_export_shutdown(net); |
1243 | } | |
1244 | ||
7ea34ac1 | 1245 | static struct pernet_operations nfsd_net_ops = { |
5717e012 SK |
1246 | .init = nfsd_init_net, |
1247 | .exit = nfsd_exit_net, | |
7ea34ac1 JL |
1248 | .id = &nfsd_net_id, |
1249 | .size = sizeof(struct nfsd_net), | |
1250 | }; | |
1251 | ||
1da177e4 LT |
1252 | static int __init init_nfsd(void) |
1253 | { | |
1254 | int retval; | |
1255 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1256 | ||
797a9d79 | 1257 | retval = register_cld_notifier(); |
813fd320 JL |
1258 | if (retval) |
1259 | return retval; | |
7ea34ac1 JL |
1260 | retval = register_pernet_subsys(&nfsd_net_ops); |
1261 | if (retval < 0) | |
813fd320 | 1262 | goto out_unregister_notifier; |
72083396 | 1263 | retval = nfsd4_init_slabs(); |
e8ff2a84 | 1264 | if (retval) |
7ea34ac1 | 1265 | goto out_unregister_pernet; |
65178db4 BS |
1266 | retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ |
1267 | if (retval) | |
1268 | goto out_free_slabs; | |
1da177e4 | 1269 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1270 | retval = nfsd_reply_cache_init(); |
1271 | if (retval) | |
1272 | goto out_free_stat; | |
1da177e4 | 1273 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
e331f606 BF |
1274 | retval = create_proc_exports_entry(); |
1275 | if (retval) | |
f69adb2f | 1276 | goto out_free_lockd; |
1da177e4 | 1277 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1278 | if (retval) |
1279 | goto out_free_all; | |
1280 | return 0; | |
1281 | out_free_all: | |
26808d3f BF |
1282 | remove_proc_entry("fs/nfs/exports", NULL); |
1283 | remove_proc_entry("fs/nfs", NULL); | |
dbf847ec | 1284 | out_free_lockd: |
26808d3f | 1285 | nfsd_lockd_shutdown(); |
e331f606 | 1286 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1287 | out_free_stat: |
1288 | nfsd_stat_shutdown(); | |
65178db4 BS |
1289 | nfsd_fault_inject_cleanup(); |
1290 | out_free_slabs: | |
26808d3f | 1291 | nfsd4_free_slabs(); |
7ea34ac1 JL |
1292 | out_unregister_pernet: |
1293 | unregister_pernet_subsys(&nfsd_net_ops); | |
813fd320 | 1294 | out_unregister_notifier: |
797a9d79 | 1295 | unregister_cld_notifier(); |
1da177e4 LT |
1296 | return retval; |
1297 | } | |
1298 | ||
1299 | static void __exit exit_nfsd(void) | |
1300 | { | |
d5c3428b | 1301 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1302 | remove_proc_entry("fs/nfs/exports", NULL); |
1303 | remove_proc_entry("fs/nfs", NULL); | |
1304 | nfsd_stat_shutdown(); | |
1305 | nfsd_lockd_shutdown(); | |
e8ff2a84 | 1306 | nfsd4_free_slabs(); |
65178db4 | 1307 | nfsd_fault_inject_cleanup(); |
1da177e4 | 1308 | unregister_filesystem(&nfsd_fs_type); |
7ea34ac1 | 1309 | unregister_pernet_subsys(&nfsd_net_ops); |
797a9d79 | 1310 | unregister_cld_notifier(); |
1da177e4 LT |
1311 | } |
1312 | ||
1313 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1314 | MODULE_LICENSE("GPL"); | |
1315 | module_init(init_nfsd) | |
1316 | module_exit(exit_nfsd) |