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Commit | Line | Data |
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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" |
9cf514cc | 24 | #include "pnfs.h" |
9a74af21 | 25 | |
1da177e4 | 26 | /* |
b0b0c0a2 | 27 | * We have a single directory with several nodes in it. |
1da177e4 LT |
28 | */ |
29 | enum { | |
30 | NFSD_Root = 1, | |
1da177e4 | 31 | NFSD_List, |
e8e8753f | 32 | NFSD_Export_features, |
1da177e4 | 33 | NFSD_Fh, |
4373ea84 | 34 | NFSD_FO_UnlockIP, |
17efa372 | 35 | NFSD_FO_UnlockFS, |
1da177e4 | 36 | NFSD_Threads, |
eed2965a | 37 | NFSD_Pool_Threads, |
03cf6c9f | 38 | NFSD_Pool_Stats, |
a2f999a3 | 39 | NFSD_Reply_Cache_Stats, |
70c3b76c | 40 | NFSD_Versions, |
80212d59 | 41 | NFSD_Ports, |
596bbe53 | 42 | NFSD_MaxBlkSize, |
5b8db00b | 43 | NFSD_MaxConnections, |
b0b0c0a2 | 44 | NFSD_SupportedEnctypes, |
70c3b76c N |
45 | /* |
46 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
47 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
48 | */ | |
49 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 50 | NFSD_Leasetime, |
efc4bb4f | 51 | NFSD_Gracetime, |
0964a3d3 | 52 | NFSD_RecoveryDir, |
7f5ef2e9 | 53 | NFSD_V4EndGrace, |
70c3b76c | 54 | #endif |
1da177e4 LT |
55 | }; |
56 | ||
57 | /* | |
58 | * write() for these nodes. | |
59 | */ | |
1da177e4 | 60 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
61 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
62 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 63 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 64 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 65 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 66 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 67 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
5b8db00b | 68 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size); |
70c3b76c | 69 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 70 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 71 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 72 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
7f5ef2e9 | 73 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); |
70c3b76c | 74 | #endif |
1da177e4 LT |
75 | |
76 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
1da177e4 | 77 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
78 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
79 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 80 | [NFSD_Threads] = write_threads, |
eed2965a | 81 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 82 | [NFSD_Versions] = write_versions, |
80212d59 | 83 | [NFSD_Ports] = write_ports, |
596bbe53 | 84 | [NFSD_MaxBlkSize] = write_maxblksize, |
5b8db00b | 85 | [NFSD_MaxConnections] = write_maxconn, |
70c3b76c | 86 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 87 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 88 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 89 | [NFSD_RecoveryDir] = write_recoverydir, |
7f5ef2e9 | 90 | [NFSD_V4EndGrace] = write_v4_end_grace, |
70c3b76c | 91 | #endif |
1da177e4 LT |
92 | }; |
93 | ||
94 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
95 | { | |
496ad9aa | 96 | ino_t ino = file_inode(file)->i_ino; |
1da177e4 LT |
97 | char *data; |
98 | ssize_t rv; | |
99 | ||
e8c96f8c | 100 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
101 | return -EINVAL; |
102 | ||
103 | data = simple_transaction_get(file, buf, size); | |
104 | if (IS_ERR(data)) | |
105 | return PTR_ERR(data); | |
106 | ||
107 | rv = write_op[ino](file, data, size); | |
8971a101 | 108 | if (rv >= 0) { |
1da177e4 LT |
109 | simple_transaction_set(file, rv); |
110 | rv = size; | |
111 | } | |
112 | return rv; | |
113 | } | |
114 | ||
7390022d N |
115 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
116 | { | |
117 | if (! file->private_data) { | |
118 | /* An attempt to read a transaction file without writing | |
119 | * causes a 0-byte write so that the file can return | |
120 | * state information | |
121 | */ | |
122 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
123 | if (rv < 0) | |
124 | return rv; | |
125 | } | |
126 | return simple_transaction_read(file, buf, size, pos); | |
127 | } | |
128 | ||
4b6f5d20 | 129 | static const struct file_operations transaction_ops = { |
1da177e4 | 130 | .write = nfsctl_transaction_write, |
7390022d | 131 | .read = nfsctl_transaction_read, |
1da177e4 | 132 | .release = simple_transaction_release, |
6038f373 | 133 | .llseek = default_llseek, |
1da177e4 LT |
134 | }; |
135 | ||
96d851c4 | 136 | static int exports_net_open(struct net *net, struct file *file) |
1da177e4 | 137 | { |
f2c7ea10 SK |
138 | int err; |
139 | struct seq_file *seq; | |
96d851c4 | 140 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
f2c7ea10 SK |
141 | |
142 | err = seq_open(file, &nfs_exports_op); | |
143 | if (err) | |
144 | return err; | |
145 | ||
146 | seq = file->private_data; | |
e5f06f72 | 147 | seq->private = nn->svc_export_cache; |
f2c7ea10 | 148 | return 0; |
1da177e4 LT |
149 | } |
150 | ||
96d851c4 SK |
151 | static int exports_proc_open(struct inode *inode, struct file *file) |
152 | { | |
153 | return exports_net_open(current->nsproxy->net_ns, file); | |
154 | } | |
155 | ||
156 | static const struct file_operations exports_proc_operations = { | |
157 | .open = exports_proc_open, | |
158 | .read = seq_read, | |
159 | .llseek = seq_lseek, | |
160 | .release = seq_release, | |
96d851c4 SK |
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, | |
173 | }; | |
174 | ||
e8e8753f BF |
175 | static int export_features_show(struct seq_file *m, void *v) |
176 | { | |
177 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
178 | return 0; | |
179 | } | |
180 | ||
181 | static int export_features_open(struct inode *inode, struct file *file) | |
182 | { | |
183 | return single_open(file, export_features_show, NULL); | |
184 | } | |
185 | ||
75ef9de1 | 186 | static const struct file_operations export_features_operations = { |
e8e8753f BF |
187 | .open = export_features_open, |
188 | .read = seq_read, | |
189 | .llseek = seq_lseek, | |
190 | .release = single_release, | |
191 | }; | |
192 | ||
b084f598 | 193 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 KC |
194 | static int supported_enctypes_show(struct seq_file *m, void *v) |
195 | { | |
b084f598 | 196 | seq_printf(m, KRB5_SUPPORTED_ENCTYPES); |
b0b0c0a2 KC |
197 | return 0; |
198 | } | |
199 | ||
200 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
201 | { | |
202 | return single_open(file, supported_enctypes_show, NULL); | |
203 | } | |
204 | ||
75ef9de1 | 205 | static const struct file_operations supported_enctypes_ops = { |
b0b0c0a2 KC |
206 | .open = supported_enctypes_open, |
207 | .read = seq_read, | |
208 | .llseek = seq_lseek, | |
209 | .release = single_release, | |
210 | }; | |
b084f598 | 211 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
b0b0c0a2 | 212 | |
828c0950 | 213 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
214 | .open = nfsd_pool_stats_open, |
215 | .read = seq_read, | |
216 | .llseek = seq_lseek, | |
ed2d8aed | 217 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
218 | }; |
219 | ||
7ba630f5 | 220 | static const struct file_operations reply_cache_stats_operations = { |
a2f999a3 JL |
221 | .open = nfsd_reply_cache_stats_open, |
222 | .read = seq_read, | |
223 | .llseek = seq_lseek, | |
224 | .release = single_release, | |
225 | }; | |
226 | ||
1da177e4 LT |
227 | /*----------------------------------------------------------------------------*/ |
228 | /* | |
229 | * payload - write methods | |
1da177e4 LT |
230 | */ |
231 | ||
244c7d44 AV |
232 | static inline struct net *netns(struct file *file) |
233 | { | |
234 | return file_inode(file)->i_sb->s_fs_info; | |
235 | } | |
1da177e4 | 236 | |
262a0982 CL |
237 | /** |
238 | * write_unlock_ip - Release all locks used by a client | |
239 | * | |
240 | * Experimental. | |
241 | * | |
242 | * Input: | |
243 | * buf: '\n'-terminated C string containing a | |
4116092b | 244 | * presentation format IP address |
262a0982 CL |
245 | * size: length of C string in @buf |
246 | * Output: | |
247 | * On success: returns zero if all specified locks were released; | |
248 | * returns one if one or more locks were not released | |
249 | * On error: return code is negative errno value | |
262a0982 | 250 | */ |
b046ccdc | 251 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 252 | { |
4116092b CL |
253 | struct sockaddr_storage address; |
254 | struct sockaddr *sap = (struct sockaddr *)&address; | |
255 | size_t salen = sizeof(address); | |
367c8c7b | 256 | char *fo_path; |
244c7d44 | 257 | struct net *net = netns(file); |
4373ea84 WC |
258 | |
259 | /* sanity check */ | |
260 | if (size == 0) | |
261 | return -EINVAL; | |
262 | ||
263 | if (buf[size-1] != '\n') | |
264 | return -EINVAL; | |
265 | ||
266 | fo_path = buf; | |
267 | if (qword_get(&buf, fo_path, size) < 0) | |
268 | return -EINVAL; | |
269 | ||
11f77942 | 270 | if (rpc_pton(net, fo_path, size, sap, salen) == 0) |
4373ea84 | 271 | return -EINVAL; |
4373ea84 | 272 | |
4116092b | 273 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
274 | } |
275 | ||
262a0982 CL |
276 | /** |
277 | * write_unlock_fs - Release all locks on a local file system | |
278 | * | |
279 | * Experimental. | |
280 | * | |
281 | * Input: | |
282 | * buf: '\n'-terminated C string containing the | |
283 | * absolute pathname of a local file system | |
284 | * size: length of C string in @buf | |
285 | * Output: | |
286 | * On success: returns zero if all specified locks were released; | |
287 | * returns one if one or more locks were not released | |
288 | * On error: return code is negative errno value | |
289 | */ | |
b046ccdc | 290 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 291 | { |
a63bb996 | 292 | struct path path; |
17efa372 WC |
293 | char *fo_path; |
294 | int error; | |
295 | ||
296 | /* sanity check */ | |
297 | if (size == 0) | |
298 | return -EINVAL; | |
299 | ||
300 | if (buf[size-1] != '\n') | |
301 | return -EINVAL; | |
302 | ||
303 | fo_path = buf; | |
304 | if (qword_get(&buf, fo_path, size) < 0) | |
305 | return -EINVAL; | |
306 | ||
a63bb996 | 307 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
308 | if (error) |
309 | return error; | |
310 | ||
262a0982 CL |
311 | /* |
312 | * XXX: Needs better sanity checking. Otherwise we could end up | |
313 | * releasing locks on the wrong file system. | |
314 | * | |
315 | * For example: | |
316 | * 1. Does the path refer to a directory? | |
317 | * 2. Is that directory a mount point, or | |
318 | * 3. Is that directory the root of an exported file system? | |
319 | */ | |
d8c9584e | 320 | error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); |
17efa372 | 321 | |
a63bb996 | 322 | path_put(&path); |
17efa372 WC |
323 | return error; |
324 | } | |
325 | ||
262a0982 CL |
326 | /** |
327 | * write_filehandle - Get a variable-length NFS file handle by path | |
328 | * | |
329 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
330 | * three alphanumeric words separated by whitespace. The string may | |
331 | * contain escape sequences. | |
332 | * | |
333 | * Input: | |
334 | * buf: | |
335 | * domain: client domain name | |
336 | * path: export pathname | |
337 | * maxsize: numeric maximum size of | |
338 | * @buf | |
339 | * size: length of C string in @buf | |
340 | * Output: | |
341 | * On success: passed-in buffer filled with '\n'-terminated C | |
342 | * string containing a ASCII hex text version | |
343 | * of the NFS file handle; | |
344 | * return code is the size in bytes of the string | |
345 | * On error: return code is negative errno value | |
346 | */ | |
1da177e4 LT |
347 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
348 | { | |
1da177e4 | 349 | char *dname, *path; |
246d95ba | 350 | int uninitialized_var(maxsize); |
1da177e4 LT |
351 | char *mesg = buf; |
352 | int len; | |
353 | struct auth_domain *dom; | |
354 | struct knfsd_fh fh; | |
355 | ||
87d26ea7 BF |
356 | if (size == 0) |
357 | return -EINVAL; | |
358 | ||
1da177e4 LT |
359 | if (buf[size-1] != '\n') |
360 | return -EINVAL; | |
361 | buf[size-1] = 0; | |
362 | ||
363 | dname = mesg; | |
364 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
365 | if (len <= 0) |
366 | return -EINVAL; | |
1da177e4 LT |
367 | |
368 | path = dname+len+1; | |
369 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
370 | if (len <= 0) |
371 | return -EINVAL; | |
1da177e4 LT |
372 | |
373 | len = get_int(&mesg, &maxsize); | |
374 | if (len) | |
375 | return len; | |
376 | ||
377 | if (maxsize < NFS_FHSIZE) | |
378 | return -EINVAL; | |
3c7aa15d | 379 | maxsize = min(maxsize, NFS3_FHSIZE); |
1da177e4 LT |
380 | |
381 | if (qword_get(&mesg, mesg, size)>0) | |
382 | return -EINVAL; | |
383 | ||
384 | /* we have all the words, they are in buf.. */ | |
385 | dom = unix_domain_find(dname); | |
386 | if (!dom) | |
387 | return -ENOMEM; | |
388 | ||
244c7d44 | 389 | len = exp_rootfh(netns(file), dom, path, &fh, maxsize); |
1da177e4 LT |
390 | auth_domain_put(dom); |
391 | if (len) | |
392 | return len; | |
393 | ||
54224f04 CL |
394 | mesg = buf; |
395 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
396 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
397 | mesg[-1] = '\n'; | |
398 | return mesg - buf; | |
399 | } | |
400 | ||
262a0982 CL |
401 | /** |
402 | * write_threads - Start NFSD, or report the current number of running threads | |
403 | * | |
404 | * Input: | |
405 | * buf: ignored | |
406 | * size: zero | |
407 | * Output: | |
408 | * On success: passed-in buffer filled with '\n'-terminated C | |
409 | * string numeric value representing the number of | |
410 | * running NFSD threads; | |
411 | * return code is the size in bytes of the string | |
412 | * On error: return code is zero | |
413 | * | |
414 | * OR | |
415 | * | |
416 | * Input: | |
417 | * buf: C string containing an unsigned | |
418 | * integer value representing the | |
419 | * number of NFSD threads to start | |
420 | * size: non-zero length of C string in @buf | |
421 | * Output: | |
422 | * On success: NFS service is started; | |
423 | * passed-in buffer filled with '\n'-terminated C | |
424 | * string numeric value representing the number of | |
425 | * running NFSD threads; | |
426 | * return code is the size in bytes of the string | |
427 | * On error: return code is zero or a negative errno value | |
428 | */ | |
1da177e4 LT |
429 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
430 | { | |
1da177e4 LT |
431 | char *mesg = buf; |
432 | int rv; | |
244c7d44 | 433 | struct net *net = netns(file); |
d41a9417 | 434 | |
1da177e4 LT |
435 | if (size > 0) { |
436 | int newthreads; | |
437 | rv = get_int(&mesg, &newthreads); | |
438 | if (rv) | |
439 | return rv; | |
9e074856 | 440 | if (newthreads < 0) |
1da177e4 | 441 | return -EINVAL; |
d41a9417 | 442 | rv = nfsd_svc(newthreads, net); |
82e12fe9 | 443 | if (rv < 0) |
1da177e4 | 444 | return rv; |
82e12fe9 | 445 | } else |
9dd9845f | 446 | rv = nfsd_nrthreads(net); |
e06b6405 | 447 | |
82e12fe9 | 448 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
449 | } |
450 | ||
262a0982 CL |
451 | /** |
452 | * write_pool_threads - Set or report the current number of threads per pool | |
453 | * | |
454 | * Input: | |
455 | * buf: ignored | |
456 | * size: zero | |
457 | * | |
458 | * OR | |
459 | * | |
460 | * Input: | |
461 | * buf: C string containing whitespace- | |
462 | * separated unsigned integer values | |
463 | * representing the number of NFSD | |
464 | * threads to start in each pool | |
465 | * size: non-zero length of C string in @buf | |
466 | * Output: | |
467 | * On success: passed-in buffer filled with '\n'-terminated C | |
468 | * string containing integer values representing the | |
469 | * number of NFSD threads in each pool; | |
470 | * return code is the size in bytes of the string | |
471 | * On error: return code is zero or a negative errno value | |
472 | */ | |
eed2965a GB |
473 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
474 | { | |
475 | /* if size > 0, look for an array of number of threads per node | |
476 | * and apply them then write out number of threads per node as reply | |
477 | */ | |
478 | char *mesg = buf; | |
479 | int i; | |
480 | int rv; | |
481 | int len; | |
bedbdd8b | 482 | int npools; |
eed2965a | 483 | int *nthreads; |
244c7d44 | 484 | struct net *net = netns(file); |
eed2965a | 485 | |
bedbdd8b | 486 | mutex_lock(&nfsd_mutex); |
9dd9845f | 487 | npools = nfsd_nrpools(net); |
eed2965a GB |
488 | if (npools == 0) { |
489 | /* | |
490 | * NFS is shut down. The admin can start it by | |
491 | * writing to the threads file but NOT the pool_threads | |
492 | * file, sorry. Report zero threads. | |
493 | */ | |
bedbdd8b | 494 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
495 | strcpy(buf, "0\n"); |
496 | return strlen(buf); | |
497 | } | |
498 | ||
499 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 500 | rv = -ENOMEM; |
eed2965a | 501 | if (nthreads == NULL) |
bedbdd8b | 502 | goto out_free; |
eed2965a GB |
503 | |
504 | if (size > 0) { | |
505 | for (i = 0; i < npools; i++) { | |
506 | rv = get_int(&mesg, &nthreads[i]); | |
507 | if (rv == -ENOENT) | |
508 | break; /* fewer numbers than pools */ | |
509 | if (rv) | |
510 | goto out_free; /* syntax error */ | |
511 | rv = -EINVAL; | |
512 | if (nthreads[i] < 0) | |
513 | goto out_free; | |
514 | } | |
3938a0d5 | 515 | rv = nfsd_set_nrthreads(i, nthreads, net); |
eed2965a GB |
516 | if (rv) |
517 | goto out_free; | |
518 | } | |
519 | ||
9dd9845f | 520 | rv = nfsd_get_nrthreads(npools, nthreads, net); |
eed2965a GB |
521 | if (rv) |
522 | goto out_free; | |
523 | ||
524 | mesg = buf; | |
525 | size = SIMPLE_TRANSACTION_LIMIT; | |
526 | for (i = 0; i < npools && size > 0; i++) { | |
527 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
528 | len = strlen(mesg); | |
529 | size -= len; | |
530 | mesg += len; | |
531 | } | |
413d63d7 | 532 | rv = mesg - buf; |
eed2965a GB |
533 | out_free: |
534 | kfree(nthreads); | |
bedbdd8b | 535 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
536 | return rv; |
537 | } | |
538 | ||
ff7d1179 TM |
539 | static ssize_t |
540 | nfsd_print_version_support(char *buf, int remaining, const char *sep, | |
abcb4dac | 541 | unsigned vers, int minor) |
ff7d1179 | 542 | { |
abcb4dac | 543 | const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; |
ff7d1179 TM |
544 | bool supported = !!nfsd_vers(vers, NFSD_TEST); |
545 | ||
abcb4dac N |
546 | if (vers == 4 && minor >= 0 && |
547 | !nfsd_minorversion(minor, NFSD_TEST)) | |
ff7d1179 | 548 | supported = false; |
abcb4dac N |
549 | if (minor == 0 && supported) |
550 | /* | |
551 | * special case for backward compatability. | |
552 | * +4.0 is never reported, it is implied by | |
553 | * +4, unless -4.0 is present. | |
554 | */ | |
555 | return 0; | |
ff7d1179 TM |
556 | return snprintf(buf, remaining, format, sep, |
557 | supported ? '+' : '-', vers, minor); | |
558 | } | |
559 | ||
3dd98a3b | 560 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 561 | { |
70c3b76c | 562 | char *mesg = buf; |
8daf220a | 563 | char *vers, *minorp, sign; |
261758b5 | 564 | int len, num, remaining; |
70c3b76c N |
565 | ssize_t tlen = 0; |
566 | char *sep; | |
244c7d44 | 567 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
70c3b76c N |
568 | |
569 | if (size>0) { | |
9dd9845f | 570 | if (nn->nfsd_serv) |
6658d3a7 | 571 | /* Cannot change versions without updating |
9dd9845f | 572 | * nn->nfsd_serv->sv_xdrsize, and reallocing |
6658d3a7 N |
573 | * rq_argp and rq_resp |
574 | */ | |
70c3b76c N |
575 | return -EBUSY; |
576 | if (buf[size-1] != '\n') | |
577 | return -EINVAL; | |
578 | buf[size-1] = 0; | |
579 | ||
580 | vers = mesg; | |
581 | len = qword_get(&mesg, vers, size); | |
582 | if (len <= 0) return -EINVAL; | |
583 | do { | |
d3635ff0 | 584 | enum vers_op cmd; |
abcb4dac | 585 | unsigned minor; |
70c3b76c N |
586 | sign = *vers; |
587 | if (sign == '+' || sign == '-') | |
8daf220a | 588 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 589 | else |
8daf220a BH |
590 | num = simple_strtol(vers, &minorp, 0); |
591 | if (*minorp == '.') { | |
ff89be87 | 592 | if (num != 4) |
8daf220a | 593 | return -EINVAL; |
e35659f1 | 594 | if (kstrtouint(minorp+1, 0, &minor) < 0) |
8daf220a | 595 | return -EINVAL; |
abcb4dac N |
596 | } |
597 | ||
d3635ff0 | 598 | cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; |
70c3b76c N |
599 | switch(num) { |
600 | case 2: | |
601 | case 3: | |
d3635ff0 | 602 | nfsd_vers(num, cmd); |
70c3b76c | 603 | break; |
d3635ff0 | 604 | case 4: |
abcb4dac N |
605 | if (*minorp == '.') { |
606 | if (nfsd_minorversion(minor, cmd) < 0) | |
607 | return -EINVAL; | |
608 | } else if ((cmd == NFSD_SET) != nfsd_vers(num, NFSD_TEST)) { | |
609 | /* | |
610 | * Either we have +4 and no minors are enabled, | |
611 | * or we have -4 and at least one minor is enabled. | |
612 | * In either case, propagate 'cmd' to all minors. | |
613 | */ | |
614 | minor = 0; | |
615 | while (nfsd_minorversion(minor, cmd) >= 0) | |
616 | minor++; | |
617 | } | |
618 | break; | |
70c3b76c N |
619 | default: |
620 | return -EINVAL; | |
621 | } | |
622 | vers += len + 1; | |
70c3b76c N |
623 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
624 | /* If all get turned off, turn them back on, as | |
625 | * having no versions is BAD | |
626 | */ | |
6658d3a7 | 627 | nfsd_reset_versions(); |
70c3b76c | 628 | } |
261758b5 | 629 | |
70c3b76c N |
630 | /* Now write current state into reply buffer */ |
631 | len = 0; | |
632 | sep = ""; | |
261758b5 | 633 | remaining = SIMPLE_TRANSACTION_LIMIT; |
ff7d1179 | 634 | for (num=2 ; num <= 4 ; num++) { |
abcb4dac | 635 | int minor; |
ff7d1179 TM |
636 | if (!nfsd_vers(num, NFSD_AVAIL)) |
637 | continue; | |
abcb4dac N |
638 | |
639 | minor = -1; | |
ff7d1179 TM |
640 | do { |
641 | len = nfsd_print_version_support(buf, remaining, | |
642 | sep, num, minor); | |
818f2f57 | 643 | if (len >= remaining) |
ff7d1179 | 644 | goto out; |
261758b5 CL |
645 | remaining -= len; |
646 | buf += len; | |
647 | tlen += len; | |
ff7d1179 | 648 | minor++; |
abcb4dac N |
649 | if (len) |
650 | sep = " "; | |
ff7d1179 TM |
651 | } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); |
652 | } | |
653 | out: | |
261758b5 | 654 | len = snprintf(buf, remaining, "\n"); |
818f2f57 | 655 | if (len >= remaining) |
261758b5 CL |
656 | return -EINVAL; |
657 | return tlen + len; | |
70c3b76c N |
658 | } |
659 | ||
262a0982 CL |
660 | /** |
661 | * write_versions - Set or report the available NFS protocol versions | |
662 | * | |
663 | * Input: | |
664 | * buf: ignored | |
665 | * size: zero | |
666 | * Output: | |
667 | * On success: passed-in buffer filled with '\n'-terminated C | |
668 | * string containing positive or negative integer | |
669 | * values representing the current status of each | |
670 | * protocol version; | |
671 | * return code is the size in bytes of the string | |
672 | * On error: return code is zero or a negative errno value | |
673 | * | |
674 | * OR | |
675 | * | |
676 | * Input: | |
677 | * buf: C string containing whitespace- | |
678 | * separated positive or negative | |
679 | * integer values representing NFS | |
680 | * protocol versions to enable ("+n") | |
681 | * or disable ("-n") | |
682 | * size: non-zero length of C string in @buf | |
683 | * Output: | |
684 | * On success: status of zero or more protocol versions has | |
685 | * been updated; passed-in buffer filled with | |
686 | * '\n'-terminated C string containing positive | |
687 | * or negative integer values representing the | |
688 | * current status of each protocol version; | |
689 | * return code is the size in bytes of the string | |
690 | * On error: return code is zero or a negative errno value | |
691 | */ | |
3dd98a3b JL |
692 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
693 | { | |
694 | ssize_t rv; | |
695 | ||
696 | mutex_lock(&nfsd_mutex); | |
697 | rv = __write_versions(file, buf, size); | |
698 | mutex_unlock(&nfsd_mutex); | |
699 | return rv; | |
700 | } | |
701 | ||
0a5372d8 CL |
702 | /* |
703 | * Zero-length write. Return a list of NFSD's current listener | |
704 | * transports. | |
705 | */ | |
9dd9845f | 706 | static ssize_t __write_ports_names(char *buf, struct net *net) |
0a5372d8 | 707 | { |
9dd9845f SK |
708 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
709 | ||
710 | if (nn->nfsd_serv == NULL) | |
0a5372d8 | 711 | return 0; |
9dd9845f | 712 | return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
713 | } |
714 | ||
0b7c2f6f CL |
715 | /* |
716 | * A single 'fd' number was written, in which case it must be for | |
717 | * a socket of a supported family/protocol, and we use it as an | |
718 | * nfsd listener. | |
719 | */ | |
08160352 | 720 | static ssize_t __write_ports_addfd(char *buf, struct net *net) |
0b7c2f6f CL |
721 | { |
722 | char *mesg = buf; | |
723 | int fd, err; | |
9dd9845f | 724 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
0b7c2f6f CL |
725 | |
726 | err = get_int(&mesg, &fd); | |
727 | if (err != 0 || fd < 0) | |
728 | return -EINVAL; | |
729 | ||
30646394 SK |
730 | if (svc_alien_sock(net, fd)) { |
731 | printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); | |
732 | return -EINVAL; | |
733 | } | |
734 | ||
6777436b | 735 | err = nfsd_create_serv(net); |
0b7c2f6f CL |
736 | if (err != 0) |
737 | return err; | |
738 | ||
9dd9845f | 739 | err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
78a8d7c8 | 740 | if (err < 0) { |
19f7e2ca | 741 | nfsd_destroy(net); |
78a8d7c8 JL |
742 | return err; |
743 | } | |
0b7c2f6f | 744 | |
ea068bad | 745 | /* Decrease the count, but don't shut down the service */ |
9dd9845f | 746 | nn->nfsd_serv->sv_nrthreads--; |
ea068bad | 747 | return err; |
0b7c2f6f CL |
748 | } |
749 | ||
4eb68c26 CL |
750 | /* |
751 | * A transport listener is added by writing it's transport name and | |
752 | * a port number. | |
753 | */ | |
08160352 | 754 | static ssize_t __write_ports_addxprt(char *buf, struct net *net) |
4eb68c26 CL |
755 | { |
756 | char transport[16]; | |
37498292 | 757 | struct svc_xprt *xprt; |
4eb68c26 | 758 | int port, err; |
9dd9845f | 759 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
4eb68c26 | 760 | |
a10fded1 | 761 | if (sscanf(buf, "%15s %5u", transport, &port) != 2) |
4eb68c26 CL |
762 | return -EINVAL; |
763 | ||
4be929be | 764 | if (port < 1 || port > USHRT_MAX) |
4eb68c26 CL |
765 | return -EINVAL; |
766 | ||
6777436b | 767 | err = nfsd_create_serv(net); |
4eb68c26 CL |
768 | if (err != 0) |
769 | return err; | |
770 | ||
9dd9845f | 771 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
4eb68c26 | 772 | PF_INET, port, SVC_SOCK_ANONYMOUS); |
68717908 | 773 | if (err < 0) |
37498292 CL |
774 | goto out_err; |
775 | ||
9dd9845f | 776 | err = svc_create_xprt(nn->nfsd_serv, transport, net, |
37498292 CL |
777 | PF_INET6, port, SVC_SOCK_ANONYMOUS); |
778 | if (err < 0 && err != -EAFNOSUPPORT) | |
779 | goto out_close; | |
0cd14a06 JL |
780 | |
781 | /* Decrease the count, but don't shut down the service */ | |
9dd9845f | 782 | nn->nfsd_serv->sv_nrthreads--; |
4eb68c26 | 783 | return 0; |
37498292 | 784 | out_close: |
9dd9845f | 785 | xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); |
37498292 CL |
786 | if (xprt != NULL) { |
787 | svc_close_xprt(xprt); | |
788 | svc_xprt_put(xprt); | |
789 | } | |
790 | out_err: | |
19f7e2ca | 791 | nfsd_destroy(net); |
37498292 | 792 | return err; |
4eb68c26 CL |
793 | } |
794 | ||
08160352 SK |
795 | static ssize_t __write_ports(struct file *file, char *buf, size_t size, |
796 | struct net *net) | |
80212d59 | 797 | { |
0a5372d8 | 798 | if (size == 0) |
9dd9845f | 799 | return __write_ports_names(buf, net); |
0b7c2f6f CL |
800 | |
801 | if (isdigit(buf[0])) | |
08160352 | 802 | return __write_ports_addfd(buf, net); |
82d56591 | 803 | |
4eb68c26 | 804 | if (isalpha(buf[0])) |
08160352 | 805 | return __write_ports_addxprt(buf, net); |
4cd5dc75 | 806 | |
b41b66d6 | 807 | return -EINVAL; |
80212d59 N |
808 | } |
809 | ||
262a0982 CL |
810 | /** |
811 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
812 | * | |
813 | * Input: | |
814 | * buf: ignored | |
815 | * size: zero | |
816 | * Output: | |
817 | * On success: passed-in buffer filled with a '\n'-terminated C | |
818 | * string containing a whitespace-separated list of | |
819 | * named NFSD listeners; | |
820 | * return code is the size in bytes of the string | |
821 | * On error: return code is zero or a negative errno value | |
822 | * | |
823 | * OR | |
824 | * | |
825 | * Input: | |
826 | * buf: C string containing an unsigned | |
827 | * integer value representing a bound | |
828 | * but unconnected socket that is to be | |
c71206a7 CL |
829 | * used as an NFSD listener; listen(3) |
830 | * must be called for a SOCK_STREAM | |
831 | * socket, otherwise it is ignored | |
262a0982 CL |
832 | * size: non-zero length of C string in @buf |
833 | * Output: | |
834 | * On success: NFS service is started; | |
835 | * passed-in buffer filled with a '\n'-terminated C | |
836 | * string containing a unique alphanumeric name of | |
837 | * the listener; | |
838 | * return code is the size in bytes of the string | |
839 | * On error: return code is a negative errno value | |
840 | * | |
841 | * OR | |
842 | * | |
843 | * Input: | |
262a0982 CL |
844 | * buf: C string containing a transport |
845 | * name and an unsigned integer value | |
846 | * representing the port to listen on, | |
847 | * separated by whitespace | |
848 | * size: non-zero length of C string in @buf | |
849 | * Output: | |
850 | * On success: returns zero; NFS service is started | |
851 | * On error: return code is a negative errno value | |
262a0982 | 852 | */ |
bedbdd8b NB |
853 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
854 | { | |
855 | ssize_t rv; | |
3dd98a3b | 856 | |
bedbdd8b | 857 | mutex_lock(&nfsd_mutex); |
244c7d44 | 858 | rv = __write_ports(file, buf, size, netns(file)); |
bedbdd8b NB |
859 | mutex_unlock(&nfsd_mutex); |
860 | return rv; | |
861 | } | |
862 | ||
863 | ||
596bbe53 N |
864 | int nfsd_max_blksize; |
865 | ||
262a0982 CL |
866 | /** |
867 | * write_maxblksize - Set or report the current NFS blksize | |
868 | * | |
869 | * Input: | |
870 | * buf: ignored | |
871 | * size: zero | |
872 | * | |
873 | * OR | |
874 | * | |
875 | * Input: | |
876 | * buf: C string containing an unsigned | |
877 | * integer value representing the new | |
878 | * NFS blksize | |
879 | * size: non-zero length of C string in @buf | |
880 | * Output: | |
881 | * On success: passed-in buffer filled with '\n'-terminated C string | |
882 | * containing numeric value of the current NFS blksize | |
883 | * setting; | |
884 | * return code is the size in bytes of the string | |
885 | * On error: return code is zero or a negative errno value | |
886 | */ | |
596bbe53 N |
887 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
888 | { | |
889 | char *mesg = buf; | |
244c7d44 | 890 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 891 | |
596bbe53 N |
892 | if (size > 0) { |
893 | int bsize; | |
894 | int rv = get_int(&mesg, &bsize); | |
895 | if (rv) | |
896 | return rv; | |
897 | /* force bsize into allowed range and | |
898 | * required alignment. | |
899 | */ | |
3c7aa15d KM |
900 | bsize = max_t(int, bsize, 1024); |
901 | bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); | |
596bbe53 | 902 | bsize &= ~(1024-1); |
bedbdd8b | 903 | mutex_lock(&nfsd_mutex); |
9dd9845f | 904 | if (nn->nfsd_serv) { |
bedbdd8b | 905 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
906 | return -EBUSY; |
907 | } | |
908 | nfsd_max_blksize = bsize; | |
bedbdd8b | 909 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 910 | } |
e06b6405 CL |
911 | |
912 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
913 | nfsd_max_blksize); | |
596bbe53 N |
914 | } |
915 | ||
5b8db00b JL |
916 | /** |
917 | * write_maxconn - Set or report the current max number of connections | |
918 | * | |
919 | * Input: | |
920 | * buf: ignored | |
921 | * size: zero | |
922 | * OR | |
923 | * | |
924 | * Input: | |
925 | * buf: C string containing an unsigned | |
926 | * integer value representing the new | |
927 | * number of max connections | |
928 | * size: non-zero length of C string in @buf | |
929 | * Output: | |
930 | * On success: passed-in buffer filled with '\n'-terminated C string | |
931 | * containing numeric value of max_connections setting | |
932 | * for this net namespace; | |
933 | * return code is the size in bytes of the string | |
934 | * On error: return code is zero or a negative errno value | |
935 | */ | |
936 | static ssize_t write_maxconn(struct file *file, char *buf, size_t size) | |
937 | { | |
938 | char *mesg = buf; | |
244c7d44 | 939 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
5b8db00b JL |
940 | unsigned int maxconn = nn->max_connections; |
941 | ||
942 | if (size > 0) { | |
943 | int rv = get_uint(&mesg, &maxconn); | |
944 | ||
945 | if (rv) | |
946 | return rv; | |
947 | nn->max_connections = maxconn; | |
948 | } | |
949 | ||
950 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); | |
951 | } | |
952 | ||
70c3b76c | 953 | #ifdef CONFIG_NFSD_V4 |
9dd9845f SK |
954 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, |
955 | time_t *time, struct nfsd_net *nn) | |
1da177e4 | 956 | { |
1da177e4 | 957 | char *mesg = buf; |
f0135740 | 958 | int rv, i; |
1da177e4 LT |
959 | |
960 | if (size > 0) { | |
9dd9845f | 961 | if (nn->nfsd_serv) |
3dd98a3b | 962 | return -EBUSY; |
f0135740 | 963 | rv = get_int(&mesg, &i); |
1da177e4 LT |
964 | if (rv) |
965 | return rv; | |
e7b184f1 BF |
966 | /* |
967 | * Some sanity checking. We don't have a reason for | |
968 | * these particular numbers, but problems with the | |
969 | * extremes are: | |
970 | * - Too short: the briefest network outage may | |
971 | * cause clients to lose all their locks. Also, | |
972 | * the frequent polling may be wasteful. | |
973 | * - Too long: do you really want reboot recovery | |
974 | * to take more than an hour? Or to make other | |
975 | * clients wait an hour before being able to | |
976 | * revoke a dead client's locks? | |
977 | */ | |
f0135740 | 978 | if (i < 10 || i > 3600) |
1da177e4 | 979 | return -EINVAL; |
f0135740 | 980 | *time = i; |
1da177e4 | 981 | } |
e06b6405 | 982 | |
f0135740 BF |
983 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); |
984 | } | |
985 | ||
9dd9845f SK |
986 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, |
987 | time_t *time, struct nfsd_net *nn) | |
f0135740 BF |
988 | { |
989 | ssize_t rv; | |
990 | ||
991 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 992 | rv = __nfsd4_write_time(file, buf, size, time, nn); |
f0135740 BF |
993 | mutex_unlock(&nfsd_mutex); |
994 | return rv; | |
1da177e4 LT |
995 | } |
996 | ||
262a0982 CL |
997 | /** |
998 | * write_leasetime - Set or report the current NFSv4 lease time | |
999 | * | |
1000 | * Input: | |
1001 | * buf: ignored | |
1002 | * size: zero | |
1003 | * | |
1004 | * OR | |
1005 | * | |
1006 | * Input: | |
1007 | * buf: C string containing an unsigned | |
1008 | * integer value representing the new | |
1009 | * NFSv4 lease expiry time | |
1010 | * size: non-zero length of C string in @buf | |
1011 | * Output: | |
1012 | * On success: passed-in buffer filled with '\n'-terminated C | |
1013 | * string containing unsigned integer value of the | |
1014 | * current lease expiry time; | |
1015 | * return code is the size in bytes of the string | |
1016 | * On error: return code is zero or a negative errno value | |
1017 | */ | |
3dd98a3b JL |
1018 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1019 | { | |
244c7d44 | 1020 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 1021 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); |
3dd98a3b JL |
1022 | } |
1023 | ||
efc4bb4f BF |
1024 | /** |
1025 | * write_gracetime - Set or report current NFSv4 grace period time | |
1026 | * | |
1027 | * As above, but sets the time of the NFSv4 grace period. | |
1028 | * | |
1029 | * Note this should never be set to less than the *previous* | |
1030 | * lease-period time, but we don't try to enforce this. (In the common | |
1031 | * case (a new boot), we don't know what the previous lease time was | |
1032 | * anyway.) | |
1033 | */ | |
1034 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1035 | { | |
244c7d44 | 1036 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
9dd9845f | 1037 | return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); |
efc4bb4f BF |
1038 | } |
1039 | ||
9dd9845f SK |
1040 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, |
1041 | struct nfsd_net *nn) | |
0964a3d3 N |
1042 | { |
1043 | char *mesg = buf; | |
1044 | char *recdir; | |
1045 | int len, status; | |
1046 | ||
3dd98a3b | 1047 | if (size > 0) { |
9dd9845f | 1048 | if (nn->nfsd_serv) |
3dd98a3b JL |
1049 | return -EBUSY; |
1050 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1051 | return -EINVAL; | |
1052 | buf[size-1] = 0; | |
0964a3d3 | 1053 | |
3dd98a3b JL |
1054 | recdir = mesg; |
1055 | len = qword_get(&mesg, recdir, size); | |
1056 | if (len <= 0) | |
1057 | return -EINVAL; | |
0964a3d3 | 1058 | |
3dd98a3b | 1059 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1060 | if (status) |
1061 | return status; | |
3dd98a3b | 1062 | } |
3d72ab8f CL |
1063 | |
1064 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1065 | nfs4_recoverydir()); | |
0964a3d3 | 1066 | } |
3dd98a3b | 1067 | |
262a0982 CL |
1068 | /** |
1069 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1070 | * | |
1071 | * Input: | |
1072 | * buf: ignored | |
1073 | * size: zero | |
1074 | * | |
1075 | * OR | |
1076 | * | |
1077 | * Input: | |
1078 | * buf: C string containing the pathname | |
1079 | * of the directory on a local file | |
1080 | * system containing permanent NFSv4 | |
1081 | * recovery data | |
1082 | * size: non-zero length of C string in @buf | |
1083 | * Output: | |
1084 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1085 | * containing the current recovery pathname setting; | |
1086 | * return code is the size in bytes of the string | |
1087 | * On error: return code is zero or a negative errno value | |
1088 | */ | |
3dd98a3b JL |
1089 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1090 | { | |
1091 | ssize_t rv; | |
244c7d44 | 1092 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
3dd98a3b JL |
1093 | |
1094 | mutex_lock(&nfsd_mutex); | |
9dd9845f | 1095 | rv = __write_recoverydir(file, buf, size, nn); |
3dd98a3b JL |
1096 | mutex_unlock(&nfsd_mutex); |
1097 | return rv; | |
1098 | } | |
1099 | ||
7f5ef2e9 JL |
1100 | /** |
1101 | * write_v4_end_grace - release grace period for nfsd's v4.x lock manager | |
1102 | * | |
1103 | * Input: | |
1104 | * buf: ignored | |
1105 | * size: zero | |
1106 | * OR | |
1107 | * | |
1108 | * Input: | |
1109 | * buf: any value | |
1110 | * size: non-zero length of C string in @buf | |
1111 | * Output: | |
1112 | * passed-in buffer filled with "Y" or "N" with a newline | |
1113 | * and NULL-terminated C string. This indicates whether | |
1114 | * the grace period has ended in the current net | |
1115 | * namespace. Return code is the size in bytes of the | |
1116 | * string. Writing a string that starts with 'Y', 'y', or | |
1117 | * '1' to the file will end the grace period for nfsd's v4 | |
1118 | * lock manager. | |
1119 | */ | |
1120 | static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) | |
1121 | { | |
244c7d44 | 1122 | struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); |
7f5ef2e9 JL |
1123 | |
1124 | if (size > 0) { | |
1125 | switch(buf[0]) { | |
1126 | case 'Y': | |
1127 | case 'y': | |
1128 | case '1': | |
1129 | nfsd4_end_grace(nn); | |
1130 | break; | |
1131 | default: | |
1132 | return -EINVAL; | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", | |
1137 | nn->grace_ended ? 'Y' : 'N'); | |
1138 | } | |
1139 | ||
70c3b76c | 1140 | #endif |
0964a3d3 | 1141 | |
1da177e4 LT |
1142 | /*----------------------------------------------------------------------------*/ |
1143 | /* | |
1144 | * populating the filesystem. | |
1145 | */ | |
1146 | ||
1147 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1148 | { | |
1149 | static struct tree_descr nfsd_files[] = { | |
96d851c4 | 1150 | [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, |
e8e8753f BF |
1151 | [NFSD_Export_features] = {"export_features", |
1152 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1153 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1154 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1155 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1156 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1157 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1158 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1159 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1160 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
a2f999a3 | 1161 | [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO}, |
70c3b76c | 1162 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1163 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1164 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
5b8db00b | 1165 | [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, |
b084f598 | 1166 | #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) |
b0b0c0a2 | 1167 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
b084f598 | 1168 | #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ |
1da177e4 LT |
1169 | #ifdef CONFIG_NFSD_V4 |
1170 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1171 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1172 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
7f5ef2e9 | 1173 | [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, |
1da177e4 LT |
1174 | #endif |
1175 | /* last one */ {""} | |
1176 | }; | |
d91ee87d EB |
1177 | get_net(sb->s_fs_info); |
1178 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1da177e4 LT |
1179 | } |
1180 | ||
fc14f2fe AV |
1181 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, |
1182 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1183 | { |
d91ee87d EB |
1184 | struct net *net = current->nsproxy->net_ns; |
1185 | return mount_ns(fs_type, flags, data, net, net->user_ns, nfsd_fill_super); | |
11f77942 SK |
1186 | } |
1187 | ||
1188 | static void nfsd_umount(struct super_block *sb) | |
1189 | { | |
1190 | struct net *net = sb->s_fs_info; | |
1191 | ||
1192 | kill_litter_super(sb); | |
1193 | put_net(net); | |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | static struct file_system_type nfsd_fs_type = { | |
1197 | .owner = THIS_MODULE, | |
1198 | .name = "nfsd", | |
fc14f2fe | 1199 | .mount = nfsd_mount, |
11f77942 | 1200 | .kill_sb = nfsd_umount, |
1da177e4 | 1201 | }; |
7f78e035 | 1202 | MODULE_ALIAS_FS("nfsd"); |
1da177e4 | 1203 | |
e331f606 BF |
1204 | #ifdef CONFIG_PROC_FS |
1205 | static int create_proc_exports_entry(void) | |
1206 | { | |
1207 | struct proc_dir_entry *entry; | |
1208 | ||
1209 | entry = proc_mkdir("fs/nfs", NULL); | |
1210 | if (!entry) | |
1211 | return -ENOMEM; | |
96d851c4 SK |
1212 | entry = proc_create("exports", 0, entry, |
1213 | &exports_proc_operations); | |
ff7c4b36 | 1214 | if (!entry) { |
1215 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1216 | return -ENOMEM; |
ff7c4b36 | 1217 | } |
e331f606 BF |
1218 | return 0; |
1219 | } | |
1220 | #else /* CONFIG_PROC_FS */ | |
1221 | static int create_proc_exports_entry(void) | |
1222 | { | |
1223 | return 0; | |
1224 | } | |
1225 | #endif | |
1226 | ||
c7d03a00 | 1227 | unsigned int nfsd_net_id; |
5717e012 SK |
1228 | |
1229 | static __net_init int nfsd_init_net(struct net *net) | |
1230 | { | |
1231 | int retval; | |
3d733711 | 1232 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
5717e012 SK |
1233 | |
1234 | retval = nfsd_export_init(net); | |
1235 | if (retval) | |
1236 | goto out_export_error; | |
f69adb2f SK |
1237 | retval = nfsd_idmap_init(net); |
1238 | if (retval) | |
1239 | goto out_idmap_error; | |
3d733711 | 1240 | nn->nfsd4_lease = 90; /* default lease time */ |
5284b44e | 1241 | nn->nfsd4_grace = 90; |
ebd7c72c BF |
1242 | nn->clverifier_counter = prandom_u32(); |
1243 | nn->clientid_counter = prandom_u32(); | |
5717e012 SK |
1244 | return 0; |
1245 | ||
f69adb2f SK |
1246 | out_idmap_error: |
1247 | nfsd_export_shutdown(net); | |
5717e012 SK |
1248 | out_export_error: |
1249 | return retval; | |
1250 | } | |
1251 | ||
1252 | static __net_exit void nfsd_exit_net(struct net *net) | |
1253 | { | |
f69adb2f | 1254 | nfsd_idmap_shutdown(net); |
5717e012 SK |
1255 | nfsd_export_shutdown(net); |
1256 | } | |
1257 | ||
7ea34ac1 | 1258 | static struct pernet_operations nfsd_net_ops = { |
5717e012 SK |
1259 | .init = nfsd_init_net, |
1260 | .exit = nfsd_exit_net, | |
7ea34ac1 JL |
1261 | .id = &nfsd_net_id, |
1262 | .size = sizeof(struct nfsd_net), | |
1263 | }; | |
1264 | ||
1da177e4 LT |
1265 | static int __init init_nfsd(void) |
1266 | { | |
1267 | int retval; | |
1268 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1269 | ||
7ea34ac1 JL |
1270 | retval = register_pernet_subsys(&nfsd_net_ops); |
1271 | if (retval < 0) | |
bb7ffbf2 GC |
1272 | return retval; |
1273 | retval = register_cld_notifier(); | |
e8ff2a84 | 1274 | if (retval) |
7ea34ac1 | 1275 | goto out_unregister_pernet; |
bb7ffbf2 GC |
1276 | retval = nfsd4_init_slabs(); |
1277 | if (retval) | |
1278 | goto out_unregister_notifier; | |
9cf514cc | 1279 | retval = nfsd4_init_pnfs(); |
65178db4 BS |
1280 | if (retval) |
1281 | goto out_free_slabs; | |
9cf514cc CH |
1282 | retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */ |
1283 | if (retval) | |
1284 | goto out_exit_pnfs; | |
1da177e4 | 1285 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1286 | retval = nfsd_reply_cache_init(); |
1287 | if (retval) | |
1288 | goto out_free_stat; | |
1da177e4 | 1289 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
e331f606 BF |
1290 | retval = create_proc_exports_entry(); |
1291 | if (retval) | |
f69adb2f | 1292 | goto out_free_lockd; |
1da177e4 | 1293 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1294 | if (retval) |
1295 | goto out_free_all; | |
1296 | return 0; | |
1297 | out_free_all: | |
26808d3f BF |
1298 | remove_proc_entry("fs/nfs/exports", NULL); |
1299 | remove_proc_entry("fs/nfs", NULL); | |
dbf847ec | 1300 | out_free_lockd: |
26808d3f | 1301 | nfsd_lockd_shutdown(); |
e331f606 | 1302 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1303 | out_free_stat: |
1304 | nfsd_stat_shutdown(); | |
65178db4 | 1305 | nfsd_fault_inject_cleanup(); |
9cf514cc CH |
1306 | out_exit_pnfs: |
1307 | nfsd4_exit_pnfs(); | |
65178db4 | 1308 | out_free_slabs: |
26808d3f | 1309 | nfsd4_free_slabs(); |
813fd320 | 1310 | out_unregister_notifier: |
797a9d79 | 1311 | unregister_cld_notifier(); |
bb7ffbf2 GC |
1312 | out_unregister_pernet: |
1313 | unregister_pernet_subsys(&nfsd_net_ops); | |
1da177e4 LT |
1314 | return retval; |
1315 | } | |
1316 | ||
1317 | static void __exit exit_nfsd(void) | |
1318 | { | |
d5c3428b | 1319 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1320 | remove_proc_entry("fs/nfs/exports", NULL); |
1321 | remove_proc_entry("fs/nfs", NULL); | |
1322 | nfsd_stat_shutdown(); | |
1323 | nfsd_lockd_shutdown(); | |
e8ff2a84 | 1324 | nfsd4_free_slabs(); |
9cf514cc | 1325 | nfsd4_exit_pnfs(); |
65178db4 | 1326 | nfsd_fault_inject_cleanup(); |
1da177e4 | 1327 | unregister_filesystem(&nfsd_fs_type); |
797a9d79 | 1328 | unregister_cld_notifier(); |
bb7ffbf2 | 1329 | unregister_pernet_subsys(&nfsd_net_ops); |
1da177e4 LT |
1330 | } |
1331 | ||
1332 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1333 | MODULE_LICENSE("GPL"); | |
1334 | module_init(init_nfsd) | |
1335 | module_exit(exit_nfsd) |