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> |
1da177e4 | 12 | #include <linux/nfsd/syscall.h> |
4373ea84 | 13 | #include <linux/lockd/lockd.h> |
4116092b | 14 | #include <linux/sunrpc/clnt.h> |
b0b0c0a2 | 15 | #include <linux/sunrpc/gss_api.h> |
1da177e4 | 16 | |
2ca72e17 | 17 | #include "idmap.h" |
9a74af21 BH |
18 | #include "nfsd.h" |
19 | #include "cache.h" | |
20 | ||
1da177e4 | 21 | /* |
b0b0c0a2 | 22 | * We have a single directory with several nodes in it. |
1da177e4 LT |
23 | */ |
24 | enum { | |
25 | NFSD_Root = 1, | |
1e140567 | 26 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
27 | NFSD_Svc, |
28 | NFSD_Add, | |
29 | NFSD_Del, | |
30 | NFSD_Export, | |
31 | NFSD_Unexport, | |
32 | NFSD_Getfd, | |
33 | NFSD_Getfs, | |
1e140567 | 34 | #endif |
1da177e4 | 35 | NFSD_List, |
e8e8753f | 36 | NFSD_Export_features, |
1da177e4 | 37 | NFSD_Fh, |
4373ea84 | 38 | NFSD_FO_UnlockIP, |
17efa372 | 39 | NFSD_FO_UnlockFS, |
1da177e4 | 40 | NFSD_Threads, |
eed2965a | 41 | NFSD_Pool_Threads, |
03cf6c9f | 42 | NFSD_Pool_Stats, |
70c3b76c | 43 | NFSD_Versions, |
80212d59 | 44 | NFSD_Ports, |
596bbe53 | 45 | NFSD_MaxBlkSize, |
b0b0c0a2 | 46 | NFSD_SupportedEnctypes, |
70c3b76c N |
47 | /* |
48 | * The below MUST come last. Otherwise we leave a hole in nfsd_files[] | |
49 | * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops | |
50 | */ | |
51 | #ifdef CONFIG_NFSD_V4 | |
1da177e4 | 52 | NFSD_Leasetime, |
efc4bb4f | 53 | NFSD_Gracetime, |
0964a3d3 | 54 | NFSD_RecoveryDir, |
70c3b76c | 55 | #endif |
1da177e4 LT |
56 | }; |
57 | ||
58 | /* | |
59 | * write() for these nodes. | |
60 | */ | |
1e140567 | 61 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
62 | static ssize_t write_svc(struct file *file, char *buf, size_t size); |
63 | static ssize_t write_add(struct file *file, char *buf, size_t size); | |
64 | static ssize_t write_del(struct file *file, char *buf, size_t size); | |
65 | static ssize_t write_export(struct file *file, char *buf, size_t size); | |
66 | static ssize_t write_unexport(struct file *file, char *buf, size_t size); | |
67 | static ssize_t write_getfd(struct file *file, char *buf, size_t size); | |
68 | static ssize_t write_getfs(struct file *file, char *buf, size_t size); | |
1e140567 | 69 | #endif |
1da177e4 | 70 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size); |
b046ccdc CL |
71 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); |
72 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); | |
1da177e4 | 73 | static ssize_t write_threads(struct file *file, char *buf, size_t size); |
eed2965a | 74 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); |
70c3b76c | 75 | static ssize_t write_versions(struct file *file, char *buf, size_t size); |
80212d59 | 76 | static ssize_t write_ports(struct file *file, char *buf, size_t size); |
596bbe53 | 77 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); |
70c3b76c | 78 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 79 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size); |
efc4bb4f | 80 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size); |
0964a3d3 | 81 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); |
70c3b76c | 82 | #endif |
1da177e4 LT |
83 | |
84 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
1e140567 | 85 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
86 | [NFSD_Svc] = write_svc, |
87 | [NFSD_Add] = write_add, | |
88 | [NFSD_Del] = write_del, | |
89 | [NFSD_Export] = write_export, | |
90 | [NFSD_Unexport] = write_unexport, | |
91 | [NFSD_Getfd] = write_getfd, | |
92 | [NFSD_Getfs] = write_getfs, | |
1e140567 | 93 | #endif |
1da177e4 | 94 | [NFSD_Fh] = write_filehandle, |
b046ccdc CL |
95 | [NFSD_FO_UnlockIP] = write_unlock_ip, |
96 | [NFSD_FO_UnlockFS] = write_unlock_fs, | |
1da177e4 | 97 | [NFSD_Threads] = write_threads, |
eed2965a | 98 | [NFSD_Pool_Threads] = write_pool_threads, |
70c3b76c | 99 | [NFSD_Versions] = write_versions, |
80212d59 | 100 | [NFSD_Ports] = write_ports, |
596bbe53 | 101 | [NFSD_MaxBlkSize] = write_maxblksize, |
70c3b76c | 102 | #ifdef CONFIG_NFSD_V4 |
1da177e4 | 103 | [NFSD_Leasetime] = write_leasetime, |
efc4bb4f | 104 | [NFSD_Gracetime] = write_gracetime, |
0964a3d3 | 105 | [NFSD_RecoveryDir] = write_recoverydir, |
70c3b76c | 106 | #endif |
1da177e4 LT |
107 | }; |
108 | ||
109 | static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
110 | { | |
7eaa36e2 | 111 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
112 | char *data; |
113 | ssize_t rv; | |
114 | ||
e8c96f8c | 115 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
116 | return -EINVAL; |
117 | ||
118 | data = simple_transaction_get(file, buf, size); | |
119 | if (IS_ERR(data)) | |
120 | return PTR_ERR(data); | |
121 | ||
122 | rv = write_op[ino](file, data, size); | |
8971a101 | 123 | if (rv >= 0) { |
1da177e4 LT |
124 | simple_transaction_set(file, rv); |
125 | rv = size; | |
126 | } | |
127 | return rv; | |
128 | } | |
129 | ||
7390022d N |
130 | static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) |
131 | { | |
5b6a599f | 132 | #ifdef CONFIG_NFSD_DEPRECATED |
c67874f9 N |
133 | static int warned; |
134 | if (file->f_dentry->d_name.name[0] == '.' && !warned) { | |
c67874f9 N |
135 | printk(KERN_INFO |
136 | "Warning: \"%s\" uses deprecated NFSD interface: %s." | |
137 | " This will be removed in 2.6.40\n", | |
049ef27b | 138 | current->comm, file->f_dentry->d_name.name); |
c67874f9 N |
139 | warned = 1; |
140 | } | |
5b6a599f | 141 | #endif |
7390022d N |
142 | if (! file->private_data) { |
143 | /* An attempt to read a transaction file without writing | |
144 | * causes a 0-byte write so that the file can return | |
145 | * state information | |
146 | */ | |
147 | ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); | |
148 | if (rv < 0) | |
149 | return rv; | |
150 | } | |
151 | return simple_transaction_read(file, buf, size, pos); | |
152 | } | |
153 | ||
4b6f5d20 | 154 | static const struct file_operations transaction_ops = { |
1da177e4 | 155 | .write = nfsctl_transaction_write, |
7390022d | 156 | .read = nfsctl_transaction_read, |
1da177e4 | 157 | .release = simple_transaction_release, |
6038f373 | 158 | .llseek = default_llseek, |
1da177e4 LT |
159 | }; |
160 | ||
1da177e4 LT |
161 | static int exports_open(struct inode *inode, struct file *file) |
162 | { | |
163 | return seq_open(file, &nfs_exports_op); | |
164 | } | |
165 | ||
4b6f5d20 | 166 | static const struct file_operations exports_operations = { |
1da177e4 LT |
167 | .open = exports_open, |
168 | .read = seq_read, | |
169 | .llseek = seq_lseek, | |
170 | .release = seq_release, | |
9ef2db26 | 171 | .owner = THIS_MODULE, |
1da177e4 LT |
172 | }; |
173 | ||
e8e8753f BF |
174 | static int export_features_show(struct seq_file *m, void *v) |
175 | { | |
176 | seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static int export_features_open(struct inode *inode, struct file *file) | |
181 | { | |
182 | return single_open(file, export_features_show, NULL); | |
183 | } | |
184 | ||
185 | static struct file_operations export_features_operations = { | |
186 | .open = export_features_open, | |
187 | .read = seq_read, | |
188 | .llseek = seq_lseek, | |
189 | .release = single_release, | |
190 | }; | |
191 | ||
0a5e5f12 | 192 | #ifdef CONFIG_SUNRPC_GSS |
b0b0c0a2 KC |
193 | static int supported_enctypes_show(struct seq_file *m, void *v) |
194 | { | |
195 | struct gss_api_mech *k5mech; | |
196 | ||
197 | k5mech = gss_mech_get_by_name("krb5"); | |
198 | if (k5mech == NULL) | |
199 | goto out; | |
200 | if (k5mech->gm_upcall_enctypes != NULL) | |
201 | seq_printf(m, k5mech->gm_upcall_enctypes); | |
202 | gss_mech_put(k5mech); | |
203 | out: | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static int supported_enctypes_open(struct inode *inode, struct file *file) | |
208 | { | |
209 | return single_open(file, supported_enctypes_show, NULL); | |
210 | } | |
211 | ||
212 | static struct file_operations supported_enctypes_ops = { | |
213 | .open = supported_enctypes_open, | |
214 | .read = seq_read, | |
215 | .llseek = seq_lseek, | |
216 | .release = single_release, | |
217 | }; | |
0a5e5f12 | 218 | #endif /* CONFIG_SUNRPC_GSS */ |
b0b0c0a2 | 219 | |
03cf6c9f | 220 | extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); |
ed2d8aed | 221 | extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); |
03cf6c9f | 222 | |
828c0950 | 223 | static const struct file_operations pool_stats_operations = { |
03cf6c9f GB |
224 | .open = nfsd_pool_stats_open, |
225 | .read = seq_read, | |
226 | .llseek = seq_lseek, | |
ed2d8aed | 227 | .release = nfsd_pool_stats_release, |
03cf6c9f GB |
228 | .owner = THIS_MODULE, |
229 | }; | |
230 | ||
1da177e4 LT |
231 | /*----------------------------------------------------------------------------*/ |
232 | /* | |
233 | * payload - write methods | |
1da177e4 LT |
234 | */ |
235 | ||
1e140567 | 236 | #ifdef CONFIG_NFSD_DEPRECATED |
262a0982 CL |
237 | /** |
238 | * write_svc - Start kernel's NFSD server | |
239 | * | |
240 | * Deprecated. /proc/fs/nfsd/threads is preferred. | |
241 | * Function remains to support old versions of nfs-utils. | |
242 | * | |
243 | * Input: | |
244 | * buf: struct nfsctl_svc | |
245 | * svc_port: port number of this | |
246 | * server's listener | |
247 | * svc_nthreads: number of threads to start | |
248 | * size: size in bytes of passed in nfsctl_svc | |
249 | * Output: | |
250 | * On success: returns zero | |
251 | * On error: return code is negative errno value | |
252 | */ | |
1da177e4 LT |
253 | static ssize_t write_svc(struct file *file, char *buf, size_t size) |
254 | { | |
255 | struct nfsctl_svc *data; | |
82e12fe9 | 256 | int err; |
1da177e4 LT |
257 | if (size < sizeof(*data)) |
258 | return -EINVAL; | |
259 | data = (struct nfsctl_svc*) buf; | |
82e12fe9 N |
260 | err = nfsd_svc(data->svc_port, data->svc_nthreads); |
261 | if (err < 0) | |
262 | return err; | |
263 | return 0; | |
1da177e4 LT |
264 | } |
265 | ||
262a0982 CL |
266 | /** |
267 | * write_add - Add or modify client entry in auth unix cache | |
268 | * | |
269 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
270 | * Function remains to support old versions of nfs-utils. | |
271 | * | |
272 | * Input: | |
273 | * buf: struct nfsctl_client | |
274 | * cl_ident: '\0'-terminated C string | |
275 | * containing domain name | |
276 | * of client | |
277 | * cl_naddr: no. of items in cl_addrlist | |
278 | * cl_addrlist: array of client addresses | |
279 | * cl_fhkeytype: ignored | |
280 | * cl_fhkeylen: ignored | |
281 | * cl_fhkey: ignored | |
282 | * size: size in bytes of passed in nfsctl_client | |
283 | * Output: | |
284 | * On success: returns zero | |
285 | * On error: return code is negative errno value | |
286 | * | |
287 | * Note: Only AF_INET client addresses are passed in, since | |
288 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
289 | */ | |
1da177e4 LT |
290 | static ssize_t write_add(struct file *file, char *buf, size_t size) |
291 | { | |
292 | struct nfsctl_client *data; | |
293 | if (size < sizeof(*data)) | |
294 | return -EINVAL; | |
295 | data = (struct nfsctl_client *)buf; | |
296 | return exp_addclient(data); | |
297 | } | |
298 | ||
262a0982 CL |
299 | /** |
300 | * write_del - Remove client from auth unix cache | |
301 | * | |
302 | * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. | |
303 | * Function remains to support old versions of nfs-utils. | |
304 | * | |
305 | * Input: | |
306 | * buf: struct nfsctl_client | |
307 | * cl_ident: '\0'-terminated C string | |
308 | * containing domain name | |
309 | * of client | |
310 | * cl_naddr: ignored | |
311 | * cl_addrlist: ignored | |
312 | * cl_fhkeytype: ignored | |
313 | * cl_fhkeylen: ignored | |
314 | * cl_fhkey: ignored | |
315 | * size: size in bytes of passed in nfsctl_client | |
316 | * Output: | |
317 | * On success: returns zero | |
318 | * On error: return code is negative errno value | |
319 | * | |
320 | * Note: Only AF_INET client addresses are passed in, since | |
321 | * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. | |
322 | */ | |
1da177e4 LT |
323 | static ssize_t write_del(struct file *file, char *buf, size_t size) |
324 | { | |
325 | struct nfsctl_client *data; | |
326 | if (size < sizeof(*data)) | |
327 | return -EINVAL; | |
328 | data = (struct nfsctl_client *)buf; | |
329 | return exp_delclient(data); | |
330 | } | |
331 | ||
262a0982 CL |
332 | /** |
333 | * write_export - Export part or all of a local file system | |
334 | * | |
335 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
336 | * Function remains to support old versions of nfs-utils. | |
337 | * | |
338 | * Input: | |
339 | * buf: struct nfsctl_export | |
340 | * ex_client: '\0'-terminated C string | |
341 | * containing domain name | |
342 | * of client allowed to access | |
343 | * this export | |
344 | * ex_path: '\0'-terminated C string | |
345 | * containing pathname of | |
346 | * directory in local file system | |
347 | * ex_dev: fsid to use for this export | |
348 | * ex_ino: ignored | |
349 | * ex_flags: export flags for this export | |
350 | * ex_anon_uid: UID to use for anonymous | |
351 | * requests | |
352 | * ex_anon_gid: GID to use for anonymous | |
353 | * requests | |
354 | * size: size in bytes of passed in nfsctl_export | |
355 | * Output: | |
356 | * On success: returns zero | |
357 | * On error: return code is negative errno value | |
358 | */ | |
1da177e4 LT |
359 | static ssize_t write_export(struct file *file, char *buf, size_t size) |
360 | { | |
361 | struct nfsctl_export *data; | |
362 | if (size < sizeof(*data)) | |
363 | return -EINVAL; | |
364 | data = (struct nfsctl_export*)buf; | |
365 | return exp_export(data); | |
366 | } | |
367 | ||
262a0982 CL |
368 | /** |
369 | * write_unexport - Unexport a previously exported file system | |
370 | * | |
371 | * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. | |
372 | * Function remains to support old versions of nfs-utils. | |
373 | * | |
374 | * Input: | |
375 | * buf: struct nfsctl_export | |
376 | * ex_client: '\0'-terminated C string | |
377 | * containing domain name | |
378 | * of client no longer allowed | |
379 | * to access this export | |
380 | * ex_path: '\0'-terminated C string | |
381 | * containing pathname of | |
382 | * directory in local file system | |
383 | * ex_dev: ignored | |
384 | * ex_ino: ignored | |
385 | * ex_flags: ignored | |
386 | * ex_anon_uid: ignored | |
387 | * ex_anon_gid: ignored | |
388 | * size: size in bytes of passed in nfsctl_export | |
389 | * Output: | |
390 | * On success: returns zero | |
391 | * On error: return code is negative errno value | |
392 | */ | |
1da177e4 LT |
393 | static ssize_t write_unexport(struct file *file, char *buf, size_t size) |
394 | { | |
395 | struct nfsctl_export *data; | |
396 | ||
397 | if (size < sizeof(*data)) | |
398 | return -EINVAL; | |
399 | data = (struct nfsctl_export*)buf; | |
400 | return exp_unexport(data); | |
401 | } | |
402 | ||
262a0982 CL |
403 | /** |
404 | * write_getfs - Get a variable-length NFS file handle by path | |
405 | * | |
406 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
407 | * Function remains to support old versions of nfs-utils. | |
408 | * | |
409 | * Input: | |
410 | * buf: struct nfsctl_fsparm | |
411 | * gd_addr: socket address of client | |
412 | * gd_path: '\0'-terminated C string | |
413 | * containing pathname of | |
414 | * directory in local file system | |
415 | * gd_maxlen: maximum size of returned file | |
416 | * handle | |
417 | * size: size in bytes of passed in nfsctl_fsparm | |
418 | * Output: | |
419 | * On success: passed-in buffer filled with a knfsd_fh structure | |
420 | * (a variable-length raw NFS file handle); | |
421 | * return code is the size in bytes of the file handle | |
422 | * On error: return code is negative errno value | |
423 | * | |
424 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
425 | * is the same size as a struct sockaddr_in. | |
426 | */ | |
1da177e4 LT |
427 | static ssize_t write_getfs(struct file *file, char *buf, size_t size) |
428 | { | |
429 | struct nfsctl_fsparm *data; | |
430 | struct sockaddr_in *sin; | |
431 | struct auth_domain *clp; | |
432 | int err = 0; | |
433 | struct knfsd_fh *res; | |
f15364bd | 434 | struct in6_addr in6; |
1da177e4 LT |
435 | |
436 | if (size < sizeof(*data)) | |
437 | return -EINVAL; | |
438 | data = (struct nfsctl_fsparm*)buf; | |
439 | err = -EPROTONOSUPPORT; | |
440 | if (data->gd_addr.sa_family != AF_INET) | |
441 | goto out; | |
442 | sin = (struct sockaddr_in *)&data->gd_addr; | |
443 | if (data->gd_maxlen > NFS3_FHSIZE) | |
444 | data->gd_maxlen = NFS3_FHSIZE; | |
445 | ||
446 | res = (struct knfsd_fh*)buf; | |
447 | ||
448 | exp_readlock(); | |
f15364bd AC |
449 | |
450 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
451 | ||
352114f3 | 452 | clp = auth_unix_lookup(&init_net, &in6); |
f15364bd | 453 | if (!clp) |
1da177e4 LT |
454 | err = -EPERM; |
455 | else { | |
456 | err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); | |
457 | auth_domain_put(clp); | |
458 | } | |
459 | exp_readunlock(); | |
460 | if (err == 0) | |
12127498 | 461 | err = res->fh_size + offsetof(struct knfsd_fh, fh_base); |
1da177e4 LT |
462 | out: |
463 | return err; | |
464 | } | |
465 | ||
262a0982 CL |
466 | /** |
467 | * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) | |
468 | * | |
469 | * Deprecated. /proc/fs/nfsd/filehandle is preferred. | |
470 | * Function remains to support old versions of nfs-utils. | |
471 | * | |
472 | * Input: | |
473 | * buf: struct nfsctl_fdparm | |
474 | * gd_addr: socket address of client | |
475 | * gd_path: '\0'-terminated C string | |
476 | * containing pathname of | |
477 | * directory in local file system | |
478 | * gd_version: fdparm structure version | |
479 | * size: size in bytes of passed in nfsctl_fdparm | |
480 | * Output: | |
481 | * On success: passed-in buffer filled with nfsctl_res | |
482 | * (a fixed-length raw NFS file handle); | |
483 | * return code is the size in bytes of the file handle | |
484 | * On error: return code is negative errno value | |
485 | * | |
486 | * Note: Only AF_INET client addresses are passed in, since gd_addr | |
487 | * is the same size as a struct sockaddr_in. | |
488 | */ | |
1da177e4 LT |
489 | static ssize_t write_getfd(struct file *file, char *buf, size_t size) |
490 | { | |
491 | struct nfsctl_fdparm *data; | |
492 | struct sockaddr_in *sin; | |
493 | struct auth_domain *clp; | |
494 | int err = 0; | |
495 | struct knfsd_fh fh; | |
496 | char *res; | |
f15364bd | 497 | struct in6_addr in6; |
1da177e4 LT |
498 | |
499 | if (size < sizeof(*data)) | |
500 | return -EINVAL; | |
501 | data = (struct nfsctl_fdparm*)buf; | |
502 | err = -EPROTONOSUPPORT; | |
503 | if (data->gd_addr.sa_family != AF_INET) | |
504 | goto out; | |
505 | err = -EINVAL; | |
506 | if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) | |
507 | goto out; | |
508 | ||
509 | res = buf; | |
510 | sin = (struct sockaddr_in *)&data->gd_addr; | |
511 | exp_readlock(); | |
f15364bd AC |
512 | |
513 | ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); | |
514 | ||
352114f3 | 515 | clp = auth_unix_lookup(&init_net, &in6); |
f15364bd | 516 | if (!clp) |
1da177e4 LT |
517 | err = -EPERM; |
518 | else { | |
519 | err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); | |
520 | auth_domain_put(clp); | |
521 | } | |
522 | exp_readunlock(); | |
523 | ||
524 | if (err == 0) { | |
525 | memset(res,0, NFS_FHSIZE); | |
526 | memcpy(res, &fh.fh_base, fh.fh_size); | |
527 | err = NFS_FHSIZE; | |
528 | } | |
529 | out: | |
530 | return err; | |
531 | } | |
1e140567 | 532 | #endif /* CONFIG_NFSD_DEPRECATED */ |
1da177e4 | 533 | |
262a0982 CL |
534 | /** |
535 | * write_unlock_ip - Release all locks used by a client | |
536 | * | |
537 | * Experimental. | |
538 | * | |
539 | * Input: | |
540 | * buf: '\n'-terminated C string containing a | |
4116092b | 541 | * presentation format IP address |
262a0982 CL |
542 | * size: length of C string in @buf |
543 | * Output: | |
544 | * On success: returns zero if all specified locks were released; | |
545 | * returns one if one or more locks were not released | |
546 | * On error: return code is negative errno value | |
262a0982 | 547 | */ |
b046ccdc | 548 | static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) |
4373ea84 | 549 | { |
4116092b CL |
550 | struct sockaddr_storage address; |
551 | struct sockaddr *sap = (struct sockaddr *)&address; | |
552 | size_t salen = sizeof(address); | |
367c8c7b | 553 | char *fo_path; |
4373ea84 WC |
554 | |
555 | /* sanity check */ | |
556 | if (size == 0) | |
557 | return -EINVAL; | |
558 | ||
559 | if (buf[size-1] != '\n') | |
560 | return -EINVAL; | |
561 | ||
562 | fo_path = buf; | |
563 | if (qword_get(&buf, fo_path, size) < 0) | |
564 | return -EINVAL; | |
565 | ||
4116092b | 566 | if (rpc_pton(fo_path, size, sap, salen) == 0) |
4373ea84 | 567 | return -EINVAL; |
4373ea84 | 568 | |
4116092b | 569 | return nlmsvc_unlock_all_by_ip(sap); |
4373ea84 WC |
570 | } |
571 | ||
262a0982 CL |
572 | /** |
573 | * write_unlock_fs - Release all locks on a local file system | |
574 | * | |
575 | * Experimental. | |
576 | * | |
577 | * Input: | |
578 | * buf: '\n'-terminated C string containing the | |
579 | * absolute pathname of a local file system | |
580 | * size: length of C string in @buf | |
581 | * Output: | |
582 | * On success: returns zero if all specified locks were released; | |
583 | * returns one if one or more locks were not released | |
584 | * On error: return code is negative errno value | |
585 | */ | |
b046ccdc | 586 | static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) |
17efa372 | 587 | { |
a63bb996 | 588 | struct path path; |
17efa372 WC |
589 | char *fo_path; |
590 | int error; | |
591 | ||
592 | /* sanity check */ | |
593 | if (size == 0) | |
594 | return -EINVAL; | |
595 | ||
596 | if (buf[size-1] != '\n') | |
597 | return -EINVAL; | |
598 | ||
599 | fo_path = buf; | |
600 | if (qword_get(&buf, fo_path, size) < 0) | |
601 | return -EINVAL; | |
602 | ||
a63bb996 | 603 | error = kern_path(fo_path, 0, &path); |
17efa372 WC |
604 | if (error) |
605 | return error; | |
606 | ||
262a0982 CL |
607 | /* |
608 | * XXX: Needs better sanity checking. Otherwise we could end up | |
609 | * releasing locks on the wrong file system. | |
610 | * | |
611 | * For example: | |
612 | * 1. Does the path refer to a directory? | |
613 | * 2. Is that directory a mount point, or | |
614 | * 3. Is that directory the root of an exported file system? | |
615 | */ | |
a63bb996 | 616 | error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); |
17efa372 | 617 | |
a63bb996 | 618 | path_put(&path); |
17efa372 WC |
619 | return error; |
620 | } | |
621 | ||
262a0982 CL |
622 | /** |
623 | * write_filehandle - Get a variable-length NFS file handle by path | |
624 | * | |
625 | * On input, the buffer contains a '\n'-terminated C string comprised of | |
626 | * three alphanumeric words separated by whitespace. The string may | |
627 | * contain escape sequences. | |
628 | * | |
629 | * Input: | |
630 | * buf: | |
631 | * domain: client domain name | |
632 | * path: export pathname | |
633 | * maxsize: numeric maximum size of | |
634 | * @buf | |
635 | * size: length of C string in @buf | |
636 | * Output: | |
637 | * On success: passed-in buffer filled with '\n'-terminated C | |
638 | * string containing a ASCII hex text version | |
639 | * of the NFS file handle; | |
640 | * return code is the size in bytes of the string | |
641 | * On error: return code is negative errno value | |
642 | */ | |
1da177e4 LT |
643 | static ssize_t write_filehandle(struct file *file, char *buf, size_t size) |
644 | { | |
1da177e4 | 645 | char *dname, *path; |
246d95ba | 646 | int uninitialized_var(maxsize); |
1da177e4 LT |
647 | char *mesg = buf; |
648 | int len; | |
649 | struct auth_domain *dom; | |
650 | struct knfsd_fh fh; | |
651 | ||
87d26ea7 BF |
652 | if (size == 0) |
653 | return -EINVAL; | |
654 | ||
1da177e4 LT |
655 | if (buf[size-1] != '\n') |
656 | return -EINVAL; | |
657 | buf[size-1] = 0; | |
658 | ||
659 | dname = mesg; | |
660 | len = qword_get(&mesg, dname, size); | |
54224f04 CL |
661 | if (len <= 0) |
662 | return -EINVAL; | |
1da177e4 LT |
663 | |
664 | path = dname+len+1; | |
665 | len = qword_get(&mesg, path, size); | |
54224f04 CL |
666 | if (len <= 0) |
667 | return -EINVAL; | |
1da177e4 LT |
668 | |
669 | len = get_int(&mesg, &maxsize); | |
670 | if (len) | |
671 | return len; | |
672 | ||
673 | if (maxsize < NFS_FHSIZE) | |
674 | return -EINVAL; | |
675 | if (maxsize > NFS3_FHSIZE) | |
676 | maxsize = NFS3_FHSIZE; | |
677 | ||
678 | if (qword_get(&mesg, mesg, size)>0) | |
679 | return -EINVAL; | |
680 | ||
681 | /* we have all the words, they are in buf.. */ | |
682 | dom = unix_domain_find(dname); | |
683 | if (!dom) | |
684 | return -ENOMEM; | |
685 | ||
686 | len = exp_rootfh(dom, path, &fh, maxsize); | |
687 | auth_domain_put(dom); | |
688 | if (len) | |
689 | return len; | |
690 | ||
54224f04 CL |
691 | mesg = buf; |
692 | len = SIMPLE_TRANSACTION_LIMIT; | |
1da177e4 LT |
693 | qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); |
694 | mesg[-1] = '\n'; | |
695 | return mesg - buf; | |
696 | } | |
697 | ||
262a0982 CL |
698 | /** |
699 | * write_threads - Start NFSD, or report the current number of running threads | |
700 | * | |
701 | * Input: | |
702 | * buf: ignored | |
703 | * size: zero | |
704 | * Output: | |
705 | * On success: passed-in buffer filled with '\n'-terminated C | |
706 | * string numeric value representing the number of | |
707 | * running NFSD threads; | |
708 | * return code is the size in bytes of the string | |
709 | * On error: return code is zero | |
710 | * | |
711 | * OR | |
712 | * | |
713 | * Input: | |
714 | * buf: C string containing an unsigned | |
715 | * integer value representing the | |
716 | * number of NFSD threads to start | |
717 | * size: non-zero length of C string in @buf | |
718 | * Output: | |
719 | * On success: NFS service is started; | |
720 | * passed-in buffer filled with '\n'-terminated C | |
721 | * string numeric value representing the number of | |
722 | * running NFSD threads; | |
723 | * return code is the size in bytes of the string | |
724 | * On error: return code is zero or a negative errno value | |
725 | */ | |
1da177e4 LT |
726 | static ssize_t write_threads(struct file *file, char *buf, size_t size) |
727 | { | |
1da177e4 LT |
728 | char *mesg = buf; |
729 | int rv; | |
730 | if (size > 0) { | |
731 | int newthreads; | |
732 | rv = get_int(&mesg, &newthreads); | |
733 | if (rv) | |
734 | return rv; | |
9e074856 | 735 | if (newthreads < 0) |
1da177e4 | 736 | return -EINVAL; |
9e074856 | 737 | rv = nfsd_svc(NFS_PORT, newthreads); |
82e12fe9 | 738 | if (rv < 0) |
1da177e4 | 739 | return rv; |
82e12fe9 N |
740 | } else |
741 | rv = nfsd_nrthreads(); | |
e06b6405 | 742 | |
82e12fe9 | 743 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); |
1da177e4 LT |
744 | } |
745 | ||
262a0982 CL |
746 | /** |
747 | * write_pool_threads - Set or report the current number of threads per pool | |
748 | * | |
749 | * Input: | |
750 | * buf: ignored | |
751 | * size: zero | |
752 | * | |
753 | * OR | |
754 | * | |
755 | * Input: | |
756 | * buf: C string containing whitespace- | |
757 | * separated unsigned integer values | |
758 | * representing the number of NFSD | |
759 | * threads to start in each pool | |
760 | * size: non-zero length of C string in @buf | |
761 | * Output: | |
762 | * On success: passed-in buffer filled with '\n'-terminated C | |
763 | * string containing integer values representing the | |
764 | * number of NFSD threads in each pool; | |
765 | * return code is the size in bytes of the string | |
766 | * On error: return code is zero or a negative errno value | |
767 | */ | |
eed2965a GB |
768 | static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) |
769 | { | |
770 | /* if size > 0, look for an array of number of threads per node | |
771 | * and apply them then write out number of threads per node as reply | |
772 | */ | |
773 | char *mesg = buf; | |
774 | int i; | |
775 | int rv; | |
776 | int len; | |
bedbdd8b | 777 | int npools; |
eed2965a GB |
778 | int *nthreads; |
779 | ||
bedbdd8b NB |
780 | mutex_lock(&nfsd_mutex); |
781 | npools = nfsd_nrpools(); | |
eed2965a GB |
782 | if (npools == 0) { |
783 | /* | |
784 | * NFS is shut down. The admin can start it by | |
785 | * writing to the threads file but NOT the pool_threads | |
786 | * file, sorry. Report zero threads. | |
787 | */ | |
bedbdd8b | 788 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
789 | strcpy(buf, "0\n"); |
790 | return strlen(buf); | |
791 | } | |
792 | ||
793 | nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); | |
bedbdd8b | 794 | rv = -ENOMEM; |
eed2965a | 795 | if (nthreads == NULL) |
bedbdd8b | 796 | goto out_free; |
eed2965a GB |
797 | |
798 | if (size > 0) { | |
799 | for (i = 0; i < npools; i++) { | |
800 | rv = get_int(&mesg, &nthreads[i]); | |
801 | if (rv == -ENOENT) | |
802 | break; /* fewer numbers than pools */ | |
803 | if (rv) | |
804 | goto out_free; /* syntax error */ | |
805 | rv = -EINVAL; | |
806 | if (nthreads[i] < 0) | |
807 | goto out_free; | |
808 | } | |
809 | rv = nfsd_set_nrthreads(i, nthreads); | |
810 | if (rv) | |
811 | goto out_free; | |
812 | } | |
813 | ||
814 | rv = nfsd_get_nrthreads(npools, nthreads); | |
815 | if (rv) | |
816 | goto out_free; | |
817 | ||
818 | mesg = buf; | |
819 | size = SIMPLE_TRANSACTION_LIMIT; | |
820 | for (i = 0; i < npools && size > 0; i++) { | |
821 | snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); | |
822 | len = strlen(mesg); | |
823 | size -= len; | |
824 | mesg += len; | |
825 | } | |
413d63d7 | 826 | rv = mesg - buf; |
eed2965a GB |
827 | out_free: |
828 | kfree(nthreads); | |
bedbdd8b | 829 | mutex_unlock(&nfsd_mutex); |
eed2965a GB |
830 | return rv; |
831 | } | |
832 | ||
3dd98a3b | 833 | static ssize_t __write_versions(struct file *file, char *buf, size_t size) |
70c3b76c | 834 | { |
70c3b76c | 835 | char *mesg = buf; |
8daf220a | 836 | char *vers, *minorp, sign; |
261758b5 | 837 | int len, num, remaining; |
8daf220a | 838 | unsigned minor; |
70c3b76c N |
839 | ssize_t tlen = 0; |
840 | char *sep; | |
841 | ||
842 | if (size>0) { | |
843 | if (nfsd_serv) | |
6658d3a7 N |
844 | /* Cannot change versions without updating |
845 | * nfsd_serv->sv_xdrsize, and reallocing | |
846 | * rq_argp and rq_resp | |
847 | */ | |
70c3b76c N |
848 | return -EBUSY; |
849 | if (buf[size-1] != '\n') | |
850 | return -EINVAL; | |
851 | buf[size-1] = 0; | |
852 | ||
853 | vers = mesg; | |
854 | len = qword_get(&mesg, vers, size); | |
855 | if (len <= 0) return -EINVAL; | |
856 | do { | |
857 | sign = *vers; | |
858 | if (sign == '+' || sign == '-') | |
8daf220a | 859 | num = simple_strtol((vers+1), &minorp, 0); |
70c3b76c | 860 | else |
8daf220a BH |
861 | num = simple_strtol(vers, &minorp, 0); |
862 | if (*minorp == '.') { | |
863 | if (num < 4) | |
864 | return -EINVAL; | |
865 | minor = simple_strtoul(minorp+1, NULL, 0); | |
866 | if (minor == 0) | |
867 | return -EINVAL; | |
868 | if (nfsd_minorversion(minor, sign == '-' ? | |
869 | NFSD_CLEAR : NFSD_SET) < 0) | |
870 | return -EINVAL; | |
871 | goto next; | |
872 | } | |
70c3b76c N |
873 | switch(num) { |
874 | case 2: | |
875 | case 3: | |
876 | case 4: | |
6658d3a7 | 877 | nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); |
70c3b76c N |
878 | break; |
879 | default: | |
880 | return -EINVAL; | |
881 | } | |
8daf220a | 882 | next: |
70c3b76c | 883 | vers += len + 1; |
70c3b76c N |
884 | } while ((len = qword_get(&mesg, vers, size)) > 0); |
885 | /* If all get turned off, turn them back on, as | |
886 | * having no versions is BAD | |
887 | */ | |
6658d3a7 | 888 | nfsd_reset_versions(); |
70c3b76c | 889 | } |
261758b5 | 890 | |
70c3b76c N |
891 | /* Now write current state into reply buffer */ |
892 | len = 0; | |
893 | sep = ""; | |
261758b5 | 894 | remaining = SIMPLE_TRANSACTION_LIMIT; |
70c3b76c | 895 | for (num=2 ; num <= 4 ; num++) |
6658d3a7 | 896 | if (nfsd_vers(num, NFSD_AVAIL)) { |
261758b5 | 897 | len = snprintf(buf, remaining, "%s%c%d", sep, |
6658d3a7 | 898 | nfsd_vers(num, NFSD_TEST)?'+':'-', |
70c3b76c N |
899 | num); |
900 | sep = " "; | |
261758b5 CL |
901 | |
902 | if (len > remaining) | |
903 | break; | |
904 | remaining -= len; | |
905 | buf += len; | |
906 | tlen += len; | |
70c3b76c | 907 | } |
8daf220a | 908 | if (nfsd_vers(4, NFSD_AVAIL)) |
261758b5 CL |
909 | for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; |
910 | minor++) { | |
911 | len = snprintf(buf, remaining, " %c4.%u", | |
8daf220a BH |
912 | (nfsd_vers(4, NFSD_TEST) && |
913 | nfsd_minorversion(minor, NFSD_TEST)) ? | |
914 | '+' : '-', | |
915 | minor); | |
261758b5 CL |
916 | |
917 | if (len > remaining) | |
918 | break; | |
919 | remaining -= len; | |
920 | buf += len; | |
921 | tlen += len; | |
922 | } | |
923 | ||
924 | len = snprintf(buf, remaining, "\n"); | |
925 | if (len > remaining) | |
926 | return -EINVAL; | |
927 | return tlen + len; | |
70c3b76c N |
928 | } |
929 | ||
262a0982 CL |
930 | /** |
931 | * write_versions - Set or report the available NFS protocol versions | |
932 | * | |
933 | * Input: | |
934 | * buf: ignored | |
935 | * size: zero | |
936 | * Output: | |
937 | * On success: passed-in buffer filled with '\n'-terminated C | |
938 | * string containing positive or negative integer | |
939 | * values representing the current status of each | |
940 | * protocol version; | |
941 | * return code is the size in bytes of the string | |
942 | * On error: return code is zero or a negative errno value | |
943 | * | |
944 | * OR | |
945 | * | |
946 | * Input: | |
947 | * buf: C string containing whitespace- | |
948 | * separated positive or negative | |
949 | * integer values representing NFS | |
950 | * protocol versions to enable ("+n") | |
951 | * or disable ("-n") | |
952 | * size: non-zero length of C string in @buf | |
953 | * Output: | |
954 | * On success: status of zero or more protocol versions has | |
955 | * been updated; passed-in buffer filled with | |
956 | * '\n'-terminated C string containing positive | |
957 | * or negative integer values representing the | |
958 | * current status of each protocol version; | |
959 | * return code is the size in bytes of the string | |
960 | * On error: return code is zero or a negative errno value | |
961 | */ | |
3dd98a3b JL |
962 | static ssize_t write_versions(struct file *file, char *buf, size_t size) |
963 | { | |
964 | ssize_t rv; | |
965 | ||
966 | mutex_lock(&nfsd_mutex); | |
967 | rv = __write_versions(file, buf, size); | |
968 | mutex_unlock(&nfsd_mutex); | |
969 | return rv; | |
970 | } | |
971 | ||
0a5372d8 CL |
972 | /* |
973 | * Zero-length write. Return a list of NFSD's current listener | |
974 | * transports. | |
975 | */ | |
976 | static ssize_t __write_ports_names(char *buf) | |
977 | { | |
978 | if (nfsd_serv == NULL) | |
979 | return 0; | |
335c54bd | 980 | return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); |
0a5372d8 CL |
981 | } |
982 | ||
0b7c2f6f CL |
983 | /* |
984 | * A single 'fd' number was written, in which case it must be for | |
985 | * a socket of a supported family/protocol, and we use it as an | |
986 | * nfsd listener. | |
987 | */ | |
988 | static ssize_t __write_ports_addfd(char *buf) | |
989 | { | |
990 | char *mesg = buf; | |
991 | int fd, err; | |
992 | ||
993 | err = get_int(&mesg, &fd); | |
994 | if (err != 0 || fd < 0) | |
995 | return -EINVAL; | |
996 | ||
997 | err = nfsd_create_serv(); | |
998 | if (err != 0) | |
999 | return err; | |
1000 | ||
bfba9ab4 | 1001 | err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); |
78a8d7c8 | 1002 | if (err < 0) { |
78a8d7c8 JL |
1003 | svc_destroy(nfsd_serv); |
1004 | return err; | |
1005 | } | |
0b7c2f6f | 1006 | |
ea068bad CL |
1007 | /* Decrease the count, but don't shut down the service */ |
1008 | nfsd_serv->sv_nrthreads--; | |
1009 | return err; | |
0b7c2f6f CL |
1010 | } |
1011 | ||
82d56591 CL |
1012 | /* |
1013 | * A '-' followed by the 'name' of a socket means we close the socket. | |
1014 | */ | |
1015 | static ssize_t __write_ports_delfd(char *buf) | |
1016 | { | |
1017 | char *toclose; | |
1018 | int len = 0; | |
1019 | ||
1020 | toclose = kstrdup(buf + 1, GFP_KERNEL); | |
1021 | if (toclose == NULL) | |
1022 | return -ENOMEM; | |
1023 | ||
1024 | if (nfsd_serv != NULL) | |
8435d34d CL |
1025 | len = svc_sock_names(nfsd_serv, buf, |
1026 | SIMPLE_TRANSACTION_LIMIT, toclose); | |
82d56591 CL |
1027 | kfree(toclose); |
1028 | return len; | |
1029 | } | |
1030 | ||
4eb68c26 CL |
1031 | /* |
1032 | * A transport listener is added by writing it's transport name and | |
1033 | * a port number. | |
1034 | */ | |
1035 | static ssize_t __write_ports_addxprt(char *buf) | |
1036 | { | |
1037 | char transport[16]; | |
37498292 | 1038 | struct svc_xprt *xprt; |
4eb68c26 CL |
1039 | int port, err; |
1040 | ||
1041 | if (sscanf(buf, "%15s %4u", transport, &port) != 2) | |
1042 | return -EINVAL; | |
1043 | ||
4be929be | 1044 | if (port < 1 || port > USHRT_MAX) |
4eb68c26 CL |
1045 | return -EINVAL; |
1046 | ||
1047 | err = nfsd_create_serv(); | |
1048 | if (err != 0) | |
1049 | return err; | |
1050 | ||
fc5d00b0 | 1051 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
4eb68c26 | 1052 | PF_INET, port, SVC_SOCK_ANONYMOUS); |
68717908 | 1053 | if (err < 0) |
37498292 CL |
1054 | goto out_err; |
1055 | ||
fc5d00b0 | 1056 | err = svc_create_xprt(nfsd_serv, transport, &init_net, |
37498292 CL |
1057 | PF_INET6, port, SVC_SOCK_ANONYMOUS); |
1058 | if (err < 0 && err != -EAFNOSUPPORT) | |
1059 | goto out_close; | |
0cd14a06 JL |
1060 | |
1061 | /* Decrease the count, but don't shut down the service */ | |
1062 | nfsd_serv->sv_nrthreads--; | |
4eb68c26 | 1063 | return 0; |
37498292 CL |
1064 | out_close: |
1065 | xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); | |
1066 | if (xprt != NULL) { | |
1067 | svc_close_xprt(xprt); | |
1068 | svc_xprt_put(xprt); | |
1069 | } | |
1070 | out_err: | |
0cd14a06 | 1071 | svc_destroy(nfsd_serv); |
37498292 | 1072 | return err; |
4eb68c26 CL |
1073 | } |
1074 | ||
4cd5dc75 CL |
1075 | /* |
1076 | * A transport listener is removed by writing a "-", it's transport | |
1077 | * name, and it's port number. | |
1078 | */ | |
1079 | static ssize_t __write_ports_delxprt(char *buf) | |
1080 | { | |
1081 | struct svc_xprt *xprt; | |
1082 | char transport[16]; | |
1083 | int port; | |
1084 | ||
1085 | if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) | |
1086 | return -EINVAL; | |
1087 | ||
4be929be | 1088 | if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) |
4cd5dc75 CL |
1089 | return -EINVAL; |
1090 | ||
1091 | xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); | |
1092 | if (xprt == NULL) | |
1093 | return -ENOTCONN; | |
1094 | ||
1095 | svc_close_xprt(xprt); | |
1096 | svc_xprt_put(xprt); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
bedbdd8b | 1100 | static ssize_t __write_ports(struct file *file, char *buf, size_t size) |
80212d59 | 1101 | { |
0a5372d8 CL |
1102 | if (size == 0) |
1103 | return __write_ports_names(buf); | |
0b7c2f6f CL |
1104 | |
1105 | if (isdigit(buf[0])) | |
1106 | return __write_ports_addfd(buf); | |
82d56591 CL |
1107 | |
1108 | if (buf[0] == '-' && isdigit(buf[1])) | |
1109 | return __write_ports_delfd(buf); | |
4eb68c26 CL |
1110 | |
1111 | if (isalpha(buf[0])) | |
1112 | return __write_ports_addxprt(buf); | |
4cd5dc75 CL |
1113 | |
1114 | if (buf[0] == '-' && isalpha(buf[1])) | |
1115 | return __write_ports_delxprt(buf); | |
1116 | ||
b41b66d6 | 1117 | return -EINVAL; |
80212d59 N |
1118 | } |
1119 | ||
262a0982 CL |
1120 | /** |
1121 | * write_ports - Pass a socket file descriptor or transport name to listen on | |
1122 | * | |
1123 | * Input: | |
1124 | * buf: ignored | |
1125 | * size: zero | |
1126 | * Output: | |
1127 | * On success: passed-in buffer filled with a '\n'-terminated C | |
1128 | * string containing a whitespace-separated list of | |
1129 | * named NFSD listeners; | |
1130 | * return code is the size in bytes of the string | |
1131 | * On error: return code is zero or a negative errno value | |
1132 | * | |
1133 | * OR | |
1134 | * | |
1135 | * Input: | |
1136 | * buf: C string containing an unsigned | |
1137 | * integer value representing a bound | |
1138 | * but unconnected socket that is to be | |
c71206a7 CL |
1139 | * used as an NFSD listener; listen(3) |
1140 | * must be called for a SOCK_STREAM | |
1141 | * socket, otherwise it is ignored | |
262a0982 CL |
1142 | * size: non-zero length of C string in @buf |
1143 | * Output: | |
1144 | * On success: NFS service is started; | |
1145 | * passed-in buffer filled with a '\n'-terminated C | |
1146 | * string containing a unique alphanumeric name of | |
1147 | * the listener; | |
1148 | * return code is the size in bytes of the string | |
1149 | * On error: return code is a negative errno value | |
1150 | * | |
1151 | * OR | |
1152 | * | |
1153 | * Input: | |
1154 | * buf: C string containing a "-" followed | |
1155 | * by an integer value representing a | |
1156 | * previously passed in socket file | |
1157 | * descriptor | |
1158 | * size: non-zero length of C string in @buf | |
1159 | * Output: | |
1160 | * On success: NFS service no longer listens on that socket; | |
1161 | * passed-in buffer filled with a '\n'-terminated C | |
1162 | * string containing a unique name of the listener; | |
1163 | * return code is the size in bytes of the string | |
1164 | * On error: return code is a negative errno value | |
1165 | * | |
1166 | * OR | |
1167 | * | |
1168 | * Input: | |
1169 | * buf: C string containing a transport | |
1170 | * name and an unsigned integer value | |
1171 | * representing the port to listen on, | |
1172 | * separated by whitespace | |
1173 | * size: non-zero length of C string in @buf | |
1174 | * Output: | |
1175 | * On success: returns zero; NFS service is started | |
1176 | * On error: return code is a negative errno value | |
1177 | * | |
1178 | * OR | |
1179 | * | |
1180 | * Input: | |
1181 | * buf: C string containing a "-" followed | |
1182 | * by a transport name and an unsigned | |
1183 | * integer value representing the port | |
1184 | * to listen on, separated by whitespace | |
1185 | * size: non-zero length of C string in @buf | |
1186 | * Output: | |
1187 | * On success: returns zero; NFS service no longer listens | |
1188 | * on that transport | |
1189 | * On error: return code is a negative errno value | |
1190 | */ | |
bedbdd8b NB |
1191 | static ssize_t write_ports(struct file *file, char *buf, size_t size) |
1192 | { | |
1193 | ssize_t rv; | |
3dd98a3b | 1194 | |
bedbdd8b NB |
1195 | mutex_lock(&nfsd_mutex); |
1196 | rv = __write_ports(file, buf, size); | |
1197 | mutex_unlock(&nfsd_mutex); | |
1198 | return rv; | |
1199 | } | |
1200 | ||
1201 | ||
596bbe53 N |
1202 | int nfsd_max_blksize; |
1203 | ||
262a0982 CL |
1204 | /** |
1205 | * write_maxblksize - Set or report the current NFS blksize | |
1206 | * | |
1207 | * Input: | |
1208 | * buf: ignored | |
1209 | * size: zero | |
1210 | * | |
1211 | * OR | |
1212 | * | |
1213 | * Input: | |
1214 | * buf: C string containing an unsigned | |
1215 | * integer value representing the new | |
1216 | * NFS blksize | |
1217 | * size: non-zero length of C string in @buf | |
1218 | * Output: | |
1219 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1220 | * containing numeric value of the current NFS blksize | |
1221 | * setting; | |
1222 | * return code is the size in bytes of the string | |
1223 | * On error: return code is zero or a negative errno value | |
1224 | */ | |
596bbe53 N |
1225 | static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) |
1226 | { | |
1227 | char *mesg = buf; | |
1228 | if (size > 0) { | |
1229 | int bsize; | |
1230 | int rv = get_int(&mesg, &bsize); | |
1231 | if (rv) | |
1232 | return rv; | |
1233 | /* force bsize into allowed range and | |
1234 | * required alignment. | |
1235 | */ | |
1236 | if (bsize < 1024) | |
1237 | bsize = 1024; | |
1238 | if (bsize > NFSSVC_MAXBLKSIZE) | |
1239 | bsize = NFSSVC_MAXBLKSIZE; | |
1240 | bsize &= ~(1024-1); | |
bedbdd8b | 1241 | mutex_lock(&nfsd_mutex); |
7fa53cc8 | 1242 | if (nfsd_serv) { |
bedbdd8b | 1243 | mutex_unlock(&nfsd_mutex); |
596bbe53 N |
1244 | return -EBUSY; |
1245 | } | |
1246 | nfsd_max_blksize = bsize; | |
bedbdd8b | 1247 | mutex_unlock(&nfsd_mutex); |
596bbe53 | 1248 | } |
e06b6405 CL |
1249 | |
1250 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", | |
1251 | nfsd_max_blksize); | |
596bbe53 N |
1252 | } |
1253 | ||
70c3b76c | 1254 | #ifdef CONFIG_NFSD_V4 |
f0135740 | 1255 | static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) |
1da177e4 | 1256 | { |
1da177e4 | 1257 | char *mesg = buf; |
f0135740 | 1258 | int rv, i; |
1da177e4 LT |
1259 | |
1260 | if (size > 0) { | |
3dd98a3b JL |
1261 | if (nfsd_serv) |
1262 | return -EBUSY; | |
f0135740 | 1263 | rv = get_int(&mesg, &i); |
1da177e4 LT |
1264 | if (rv) |
1265 | return rv; | |
e7b184f1 BF |
1266 | /* |
1267 | * Some sanity checking. We don't have a reason for | |
1268 | * these particular numbers, but problems with the | |
1269 | * extremes are: | |
1270 | * - Too short: the briefest network outage may | |
1271 | * cause clients to lose all their locks. Also, | |
1272 | * the frequent polling may be wasteful. | |
1273 | * - Too long: do you really want reboot recovery | |
1274 | * to take more than an hour? Or to make other | |
1275 | * clients wait an hour before being able to | |
1276 | * revoke a dead client's locks? | |
1277 | */ | |
f0135740 | 1278 | if (i < 10 || i > 3600) |
1da177e4 | 1279 | return -EINVAL; |
f0135740 | 1280 | *time = i; |
1da177e4 | 1281 | } |
e06b6405 | 1282 | |
f0135740 BF |
1283 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); |
1284 | } | |
1285 | ||
1286 | static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) | |
1287 | { | |
1288 | ssize_t rv; | |
1289 | ||
1290 | mutex_lock(&nfsd_mutex); | |
1291 | rv = __nfsd4_write_time(file, buf, size, time); | |
1292 | mutex_unlock(&nfsd_mutex); | |
1293 | return rv; | |
1da177e4 LT |
1294 | } |
1295 | ||
262a0982 CL |
1296 | /** |
1297 | * write_leasetime - Set or report the current NFSv4 lease time | |
1298 | * | |
1299 | * Input: | |
1300 | * buf: ignored | |
1301 | * size: zero | |
1302 | * | |
1303 | * OR | |
1304 | * | |
1305 | * Input: | |
1306 | * buf: C string containing an unsigned | |
1307 | * integer value representing the new | |
1308 | * NFSv4 lease expiry time | |
1309 | * size: non-zero length of C string in @buf | |
1310 | * Output: | |
1311 | * On success: passed-in buffer filled with '\n'-terminated C | |
1312 | * string containing unsigned integer value of the | |
1313 | * current lease expiry time; | |
1314 | * return code is the size in bytes of the string | |
1315 | * On error: return code is zero or a negative errno value | |
1316 | */ | |
3dd98a3b JL |
1317 | static ssize_t write_leasetime(struct file *file, char *buf, size_t size) |
1318 | { | |
f0135740 | 1319 | return nfsd4_write_time(file, buf, size, &nfsd4_lease); |
3dd98a3b JL |
1320 | } |
1321 | ||
efc4bb4f BF |
1322 | /** |
1323 | * write_gracetime - Set or report current NFSv4 grace period time | |
1324 | * | |
1325 | * As above, but sets the time of the NFSv4 grace period. | |
1326 | * | |
1327 | * Note this should never be set to less than the *previous* | |
1328 | * lease-period time, but we don't try to enforce this. (In the common | |
1329 | * case (a new boot), we don't know what the previous lease time was | |
1330 | * anyway.) | |
1331 | */ | |
1332 | static ssize_t write_gracetime(struct file *file, char *buf, size_t size) | |
1333 | { | |
1334 | return nfsd4_write_time(file, buf, size, &nfsd4_grace); | |
1335 | } | |
1336 | ||
3dd98a3b JL |
1337 | extern char *nfs4_recoverydir(void); |
1338 | ||
1339 | static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) | |
0964a3d3 N |
1340 | { |
1341 | char *mesg = buf; | |
1342 | char *recdir; | |
1343 | int len, status; | |
1344 | ||
3dd98a3b JL |
1345 | if (size > 0) { |
1346 | if (nfsd_serv) | |
1347 | return -EBUSY; | |
1348 | if (size > PATH_MAX || buf[size-1] != '\n') | |
1349 | return -EINVAL; | |
1350 | buf[size-1] = 0; | |
0964a3d3 | 1351 | |
3dd98a3b JL |
1352 | recdir = mesg; |
1353 | len = qword_get(&mesg, recdir, size); | |
1354 | if (len <= 0) | |
1355 | return -EINVAL; | |
0964a3d3 | 1356 | |
3dd98a3b | 1357 | status = nfs4_reset_recoverydir(recdir); |
69049961 AK |
1358 | if (status) |
1359 | return status; | |
3dd98a3b | 1360 | } |
3d72ab8f CL |
1361 | |
1362 | return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", | |
1363 | nfs4_recoverydir()); | |
0964a3d3 | 1364 | } |
3dd98a3b | 1365 | |
262a0982 CL |
1366 | /** |
1367 | * write_recoverydir - Set or report the pathname of the recovery directory | |
1368 | * | |
1369 | * Input: | |
1370 | * buf: ignored | |
1371 | * size: zero | |
1372 | * | |
1373 | * OR | |
1374 | * | |
1375 | * Input: | |
1376 | * buf: C string containing the pathname | |
1377 | * of the directory on a local file | |
1378 | * system containing permanent NFSv4 | |
1379 | * recovery data | |
1380 | * size: non-zero length of C string in @buf | |
1381 | * Output: | |
1382 | * On success: passed-in buffer filled with '\n'-terminated C string | |
1383 | * containing the current recovery pathname setting; | |
1384 | * return code is the size in bytes of the string | |
1385 | * On error: return code is zero or a negative errno value | |
1386 | */ | |
3dd98a3b JL |
1387 | static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) |
1388 | { | |
1389 | ssize_t rv; | |
1390 | ||
1391 | mutex_lock(&nfsd_mutex); | |
1392 | rv = __write_recoverydir(file, buf, size); | |
1393 | mutex_unlock(&nfsd_mutex); | |
1394 | return rv; | |
1395 | } | |
1396 | ||
70c3b76c | 1397 | #endif |
0964a3d3 | 1398 | |
1da177e4 LT |
1399 | /*----------------------------------------------------------------------------*/ |
1400 | /* | |
1401 | * populating the filesystem. | |
1402 | */ | |
1403 | ||
1404 | static int nfsd_fill_super(struct super_block * sb, void * data, int silent) | |
1405 | { | |
1406 | static struct tree_descr nfsd_files[] = { | |
1e140567 | 1407 | #ifdef CONFIG_NFSD_DEPRECATED |
1da177e4 LT |
1408 | [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, |
1409 | [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, | |
1410 | [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, | |
1411 | [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, | |
1412 | [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, | |
1413 | [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1414 | [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, | |
1e140567 | 1415 | #endif |
1da177e4 | 1416 | [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, |
e8e8753f BF |
1417 | [NFSD_Export_features] = {"export_features", |
1418 | &export_features_operations, S_IRUGO}, | |
4373ea84 WC |
1419 | [NFSD_FO_UnlockIP] = {"unlock_ip", |
1420 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
17efa372 WC |
1421 | [NFSD_FO_UnlockFS] = {"unlock_filesystem", |
1422 | &transaction_ops, S_IWUSR|S_IRUSR}, | |
1da177e4 LT |
1423 | [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, |
1424 | [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, | |
eed2965a | 1425 | [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, |
03cf6c9f | 1426 | [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, |
70c3b76c | 1427 | [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, |
80212d59 | 1428 | [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, |
596bbe53 | 1429 | [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, |
0a5e5f12 | 1430 | #ifdef CONFIG_SUNRPC_GSS |
b0b0c0a2 | 1431 | [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO}, |
0a5e5f12 | 1432 | #endif /* CONFIG_SUNRPC_GSS */ |
1da177e4 LT |
1433 | #ifdef CONFIG_NFSD_V4 |
1434 | [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, | |
efc4bb4f | 1435 | [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, |
0964a3d3 | 1436 | [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, |
1da177e4 LT |
1437 | #endif |
1438 | /* last one */ {""} | |
1439 | }; | |
1440 | return simple_fill_super(sb, 0x6e667364, nfsd_files); | |
1441 | } | |
1442 | ||
fc14f2fe AV |
1443 | static struct dentry *nfsd_mount(struct file_system_type *fs_type, |
1444 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1445 | { |
fc14f2fe | 1446 | return mount_single(fs_type, flags, data, nfsd_fill_super); |
1da177e4 LT |
1447 | } |
1448 | ||
1449 | static struct file_system_type nfsd_fs_type = { | |
1450 | .owner = THIS_MODULE, | |
1451 | .name = "nfsd", | |
fc14f2fe | 1452 | .mount = nfsd_mount, |
1da177e4 LT |
1453 | .kill_sb = kill_litter_super, |
1454 | }; | |
1455 | ||
e331f606 BF |
1456 | #ifdef CONFIG_PROC_FS |
1457 | static int create_proc_exports_entry(void) | |
1458 | { | |
1459 | struct proc_dir_entry *entry; | |
1460 | ||
1461 | entry = proc_mkdir("fs/nfs", NULL); | |
1462 | if (!entry) | |
1463 | return -ENOMEM; | |
9ef2db26 | 1464 | entry = proc_create("exports", 0, entry, &exports_operations); |
e331f606 BF |
1465 | if (!entry) |
1466 | return -ENOMEM; | |
e331f606 BF |
1467 | return 0; |
1468 | } | |
1469 | #else /* CONFIG_PROC_FS */ | |
1470 | static int create_proc_exports_entry(void) | |
1471 | { | |
1472 | return 0; | |
1473 | } | |
1474 | #endif | |
1475 | ||
1da177e4 LT |
1476 | static int __init init_nfsd(void) |
1477 | { | |
1478 | int retval; | |
1479 | printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); | |
1480 | ||
e8ff2a84 BF |
1481 | retval = nfs4_state_init(); /* nfs4 locking state */ |
1482 | if (retval) | |
1483 | return retval; | |
1da177e4 | 1484 | nfsd_stat_init(); /* Statistics */ |
d5c3428b BF |
1485 | retval = nfsd_reply_cache_init(); |
1486 | if (retval) | |
1487 | goto out_free_stat; | |
dbf847ec BF |
1488 | retval = nfsd_export_init(); |
1489 | if (retval) | |
1490 | goto out_free_cache; | |
1da177e4 | 1491 | nfsd_lockd_init(); /* lockd->nfsd callbacks */ |
dbf847ec BF |
1492 | retval = nfsd_idmap_init(); |
1493 | if (retval) | |
1494 | goto out_free_lockd; | |
e331f606 BF |
1495 | retval = create_proc_exports_entry(); |
1496 | if (retval) | |
1497 | goto out_free_idmap; | |
1da177e4 | 1498 | retval = register_filesystem(&nfsd_fs_type); |
26808d3f BF |
1499 | if (retval) |
1500 | goto out_free_all; | |
1501 | return 0; | |
1502 | out_free_all: | |
26808d3f BF |
1503 | remove_proc_entry("fs/nfs/exports", NULL); |
1504 | remove_proc_entry("fs/nfs", NULL); | |
e331f606 | 1505 | out_free_idmap: |
dbf847ec BF |
1506 | nfsd_idmap_shutdown(); |
1507 | out_free_lockd: | |
26808d3f | 1508 | nfsd_lockd_shutdown(); |
e331f606 | 1509 | nfsd_export_shutdown(); |
dbf847ec | 1510 | out_free_cache: |
e331f606 | 1511 | nfsd_reply_cache_shutdown(); |
d5c3428b BF |
1512 | out_free_stat: |
1513 | nfsd_stat_shutdown(); | |
26808d3f | 1514 | nfsd4_free_slabs(); |
1da177e4 LT |
1515 | return retval; |
1516 | } | |
1517 | ||
1518 | static void __exit exit_nfsd(void) | |
1519 | { | |
1520 | nfsd_export_shutdown(); | |
d5c3428b | 1521 | nfsd_reply_cache_shutdown(); |
1da177e4 LT |
1522 | remove_proc_entry("fs/nfs/exports", NULL); |
1523 | remove_proc_entry("fs/nfs", NULL); | |
1524 | nfsd_stat_shutdown(); | |
1525 | nfsd_lockd_shutdown(); | |
1da177e4 | 1526 | nfsd_idmap_shutdown(); |
e8ff2a84 | 1527 | nfsd4_free_slabs(); |
1da177e4 LT |
1528 | unregister_filesystem(&nfsd_fs_type); |
1529 | } | |
1530 | ||
1531 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1532 | MODULE_LICENSE("GPL"); | |
1533 | module_init(init_nfsd) | |
1534 | module_exit(exit_nfsd) |