blob: 0f0e77f2012f64951d9b8c1fc54f19156fab6f62 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Syscall interface to knfsd.
3 *
4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
5 */
6
Al Viro3f8206d2008-07-26 03:46:43 -04007#include <linux/namei.h>
NeilBrownb41b66d2006-10-02 02:17:48 -07008#include <linux/ctype.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/nfsd_idmap.h>
NeilBrown80212d52006-10-02 02:17:47 -070011#include <linux/sunrpc/svcsock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/nfsd/syscall.h>
Wendy Cheng4373ea82008-01-17 11:10:12 -050013#include <linux/lockd/lockd.h>
Chuck Lever41160922009-08-09 15:09:40 -040014#include <linux/sunrpc/clnt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
Boaz Harrosh9a74af22009-12-03 20:30:56 +020016#include "nfsd.h"
17#include "cache.h"
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019/*
20 * We have a single directory with 9 nodes in it.
21 */
22enum {
23 NFSD_Root = 1,
24 NFSD_Svc,
25 NFSD_Add,
26 NFSD_Del,
27 NFSD_Export,
28 NFSD_Unexport,
29 NFSD_Getfd,
30 NFSD_Getfs,
31 NFSD_List,
J. Bruce Fieldse8e87532009-12-14 12:53:32 -050032 NFSD_Export_features,
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 NFSD_Fh,
Wendy Cheng4373ea82008-01-17 11:10:12 -050034 NFSD_FO_UnlockIP,
Wendy Cheng17efa372008-01-17 11:10:12 -050035 NFSD_FO_UnlockFS,
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 NFSD_Threads,
Greg Bankseed29652006-10-02 02:18:02 -070037 NFSD_Pool_Threads,
Greg Banks03cf6c92009-01-13 21:26:36 +110038 NFSD_Pool_Stats,
NeilBrown70c3b762005-11-07 01:00:25 -080039 NFSD_Versions,
NeilBrown80212d52006-10-02 02:17:47 -070040 NFSD_Ports,
NeilBrown596bbe52006-10-04 02:15:48 -070041 NFSD_MaxBlkSize,
NeilBrown70c3b762005-11-07 01:00:25 -080042 /*
43 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
44 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
45 */
46#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 NFSD_Leasetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070048 NFSD_RecoveryDir,
NeilBrown70c3b762005-11-07 01:00:25 -080049#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070050};
51
52/*
53 * write() for these nodes.
54 */
55static ssize_t write_svc(struct file *file, char *buf, size_t size);
56static ssize_t write_add(struct file *file, char *buf, size_t size);
57static ssize_t write_del(struct file *file, char *buf, size_t size);
58static ssize_t write_export(struct file *file, char *buf, size_t size);
59static ssize_t write_unexport(struct file *file, char *buf, size_t size);
60static ssize_t write_getfd(struct file *file, char *buf, size_t size);
61static ssize_t write_getfs(struct file *file, char *buf, size_t size);
62static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
Chuck Leverb046ccd2008-12-12 16:57:13 -050063static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
64static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static ssize_t write_threads(struct file *file, char *buf, size_t size);
Greg Bankseed29652006-10-02 02:18:02 -070066static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080067static ssize_t write_versions(struct file *file, char *buf, size_t size);
NeilBrown80212d52006-10-02 02:17:47 -070068static ssize_t write_ports(struct file *file, char *buf, size_t size);
NeilBrown596bbe52006-10-04 02:15:48 -070069static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080070#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070071static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
NeilBrown0964a3d2005-06-23 22:04:32 -070072static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080073#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75static ssize_t (*write_op[])(struct file *, char *, size_t) = {
76 [NFSD_Svc] = write_svc,
77 [NFSD_Add] = write_add,
78 [NFSD_Del] = write_del,
79 [NFSD_Export] = write_export,
80 [NFSD_Unexport] = write_unexport,
81 [NFSD_Getfd] = write_getfd,
82 [NFSD_Getfs] = write_getfs,
83 [NFSD_Fh] = write_filehandle,
Chuck Leverb046ccd2008-12-12 16:57:13 -050084 [NFSD_FO_UnlockIP] = write_unlock_ip,
85 [NFSD_FO_UnlockFS] = write_unlock_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 [NFSD_Threads] = write_threads,
Greg Bankseed29652006-10-02 02:18:02 -070087 [NFSD_Pool_Threads] = write_pool_threads,
NeilBrown70c3b762005-11-07 01:00:25 -080088 [NFSD_Versions] = write_versions,
NeilBrown80212d52006-10-02 02:17:47 -070089 [NFSD_Ports] = write_ports,
NeilBrown596bbe52006-10-04 02:15:48 -070090 [NFSD_MaxBlkSize] = write_maxblksize,
NeilBrown70c3b762005-11-07 01:00:25 -080091#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 [NFSD_Leasetime] = write_leasetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070093 [NFSD_RecoveryDir] = write_recoverydir,
NeilBrown70c3b762005-11-07 01:00:25 -080094#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070095};
96
97static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
98{
Josef "Jeff" Sipek7eaa36e2006-12-08 02:36:41 -080099 ino_t ino = file->f_path.dentry->d_inode->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 char *data;
101 ssize_t rv;
102
Tobias Klausere8c96f82006-03-24 03:15:34 -0800103 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 return -EINVAL;
105
106 data = simple_transaction_get(file, buf, size);
107 if (IS_ERR(data))
108 return PTR_ERR(data);
109
110 rv = write_op[ino](file, data, size);
NeilBrown8971a102007-02-14 00:33:11 -0800111 if (rv >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 simple_transaction_set(file, rv);
113 rv = size;
114 }
115 return rv;
116}
117
NeilBrown73900222005-11-07 01:00:24 -0800118static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
119{
120 if (! file->private_data) {
121 /* An attempt to read a transaction file without writing
122 * causes a 0-byte write so that the file can return
123 * state information
124 */
125 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
126 if (rv < 0)
127 return rv;
128 }
129 return simple_transaction_read(file, buf, size, pos);
130}
131
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800132static const struct file_operations transaction_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 .write = nfsctl_transaction_write,
NeilBrown73900222005-11-07 01:00:24 -0800134 .read = nfsctl_transaction_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 .release = simple_transaction_release,
136};
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138static int exports_open(struct inode *inode, struct file *file)
139{
140 return seq_open(file, &nfs_exports_op);
141}
142
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800143static const struct file_operations exports_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 .open = exports_open,
145 .read = seq_read,
146 .llseek = seq_lseek,
147 .release = seq_release,
Denis V. Lunev9ef2db22008-04-29 01:02:04 -0700148 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149};
150
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500151static int export_features_show(struct seq_file *m, void *v)
152{
153 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
154 return 0;
155}
156
157static int export_features_open(struct inode *inode, struct file *file)
158{
159 return single_open(file, export_features_show, NULL);
160}
161
162static struct file_operations export_features_operations = {
163 .open = export_features_open,
164 .read = seq_read,
165 .llseek = seq_lseek,
166 .release = single_release,
167};
168
Greg Banks03cf6c92009-01-13 21:26:36 +1100169extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900170extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
Greg Banks03cf6c92009-01-13 21:26:36 +1100171
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700172static const struct file_operations pool_stats_operations = {
Greg Banks03cf6c92009-01-13 21:26:36 +1100173 .open = nfsd_pool_stats_open,
174 .read = seq_read,
175 .llseek = seq_lseek,
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900176 .release = nfsd_pool_stats_release,
Greg Banks03cf6c92009-01-13 21:26:36 +1100177 .owner = THIS_MODULE,
178};
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180/*----------------------------------------------------------------------------*/
181/*
182 * payload - write methods
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 */
184
Chuck Lever262a0982008-12-12 16:57:35 -0500185/**
186 * write_svc - Start kernel's NFSD server
187 *
188 * Deprecated. /proc/fs/nfsd/threads is preferred.
189 * Function remains to support old versions of nfs-utils.
190 *
191 * Input:
192 * buf: struct nfsctl_svc
193 * svc_port: port number of this
194 * server's listener
195 * svc_nthreads: number of threads to start
196 * size: size in bytes of passed in nfsctl_svc
197 * Output:
198 * On success: returns zero
199 * On error: return code is negative errno value
200 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201static ssize_t write_svc(struct file *file, char *buf, size_t size)
202{
203 struct nfsctl_svc *data;
NeilBrown82e12fe2009-06-16 11:03:07 +1000204 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 if (size < sizeof(*data))
206 return -EINVAL;
207 data = (struct nfsctl_svc*) buf;
NeilBrown82e12fe2009-06-16 11:03:07 +1000208 err = nfsd_svc(data->svc_port, data->svc_nthreads);
209 if (err < 0)
210 return err;
211 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
Chuck Lever262a0982008-12-12 16:57:35 -0500214/**
215 * write_add - Add or modify client entry in auth unix cache
216 *
217 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
218 * Function remains to support old versions of nfs-utils.
219 *
220 * Input:
221 * buf: struct nfsctl_client
222 * cl_ident: '\0'-terminated C string
223 * containing domain name
224 * of client
225 * cl_naddr: no. of items in cl_addrlist
226 * cl_addrlist: array of client addresses
227 * cl_fhkeytype: ignored
228 * cl_fhkeylen: ignored
229 * cl_fhkey: ignored
230 * size: size in bytes of passed in nfsctl_client
231 * Output:
232 * On success: returns zero
233 * On error: return code is negative errno value
234 *
235 * Note: Only AF_INET client addresses are passed in, since
236 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
237 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238static ssize_t write_add(struct file *file, char *buf, size_t size)
239{
240 struct nfsctl_client *data;
241 if (size < sizeof(*data))
242 return -EINVAL;
243 data = (struct nfsctl_client *)buf;
244 return exp_addclient(data);
245}
246
Chuck Lever262a0982008-12-12 16:57:35 -0500247/**
248 * write_del - Remove client from auth unix cache
249 *
250 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
251 * Function remains to support old versions of nfs-utils.
252 *
253 * Input:
254 * buf: struct nfsctl_client
255 * cl_ident: '\0'-terminated C string
256 * containing domain name
257 * of client
258 * cl_naddr: ignored
259 * cl_addrlist: ignored
260 * cl_fhkeytype: ignored
261 * cl_fhkeylen: ignored
262 * cl_fhkey: ignored
263 * size: size in bytes of passed in nfsctl_client
264 * Output:
265 * On success: returns zero
266 * On error: return code is negative errno value
267 *
268 * Note: Only AF_INET client addresses are passed in, since
269 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
270 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271static ssize_t write_del(struct file *file, char *buf, size_t size)
272{
273 struct nfsctl_client *data;
274 if (size < sizeof(*data))
275 return -EINVAL;
276 data = (struct nfsctl_client *)buf;
277 return exp_delclient(data);
278}
279
Chuck Lever262a0982008-12-12 16:57:35 -0500280/**
281 * write_export - Export part or all of a local file system
282 *
283 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
284 * Function remains to support old versions of nfs-utils.
285 *
286 * Input:
287 * buf: struct nfsctl_export
288 * ex_client: '\0'-terminated C string
289 * containing domain name
290 * of client allowed to access
291 * this export
292 * ex_path: '\0'-terminated C string
293 * containing pathname of
294 * directory in local file system
295 * ex_dev: fsid to use for this export
296 * ex_ino: ignored
297 * ex_flags: export flags for this export
298 * ex_anon_uid: UID to use for anonymous
299 * requests
300 * ex_anon_gid: GID to use for anonymous
301 * requests
302 * size: size in bytes of passed in nfsctl_export
303 * Output:
304 * On success: returns zero
305 * On error: return code is negative errno value
306 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307static ssize_t write_export(struct file *file, char *buf, size_t size)
308{
309 struct nfsctl_export *data;
310 if (size < sizeof(*data))
311 return -EINVAL;
312 data = (struct nfsctl_export*)buf;
313 return exp_export(data);
314}
315
Chuck Lever262a0982008-12-12 16:57:35 -0500316/**
317 * write_unexport - Unexport a previously exported file system
318 *
319 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
320 * Function remains to support old versions of nfs-utils.
321 *
322 * Input:
323 * buf: struct nfsctl_export
324 * ex_client: '\0'-terminated C string
325 * containing domain name
326 * of client no longer allowed
327 * to access this export
328 * ex_path: '\0'-terminated C string
329 * containing pathname of
330 * directory in local file system
331 * ex_dev: ignored
332 * ex_ino: ignored
333 * ex_flags: ignored
334 * ex_anon_uid: ignored
335 * ex_anon_gid: ignored
336 * size: size in bytes of passed in nfsctl_export
337 * Output:
338 * On success: returns zero
339 * On error: return code is negative errno value
340 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341static ssize_t write_unexport(struct file *file, char *buf, size_t size)
342{
343 struct nfsctl_export *data;
344
345 if (size < sizeof(*data))
346 return -EINVAL;
347 data = (struct nfsctl_export*)buf;
348 return exp_unexport(data);
349}
350
Chuck Lever262a0982008-12-12 16:57:35 -0500351/**
352 * write_getfs - Get a variable-length NFS file handle by path
353 *
354 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
355 * Function remains to support old versions of nfs-utils.
356 *
357 * Input:
358 * buf: struct nfsctl_fsparm
359 * gd_addr: socket address of client
360 * gd_path: '\0'-terminated C string
361 * containing pathname of
362 * directory in local file system
363 * gd_maxlen: maximum size of returned file
364 * handle
365 * size: size in bytes of passed in nfsctl_fsparm
366 * Output:
367 * On success: passed-in buffer filled with a knfsd_fh structure
368 * (a variable-length raw NFS file handle);
369 * return code is the size in bytes of the file handle
370 * On error: return code is negative errno value
371 *
372 * Note: Only AF_INET client addresses are passed in, since gd_addr
373 * is the same size as a struct sockaddr_in.
374 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375static ssize_t write_getfs(struct file *file, char *buf, size_t size)
376{
377 struct nfsctl_fsparm *data;
378 struct sockaddr_in *sin;
379 struct auth_domain *clp;
380 int err = 0;
381 struct knfsd_fh *res;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100382 struct in6_addr in6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
384 if (size < sizeof(*data))
385 return -EINVAL;
386 data = (struct nfsctl_fsparm*)buf;
387 err = -EPROTONOSUPPORT;
388 if (data->gd_addr.sa_family != AF_INET)
389 goto out;
390 sin = (struct sockaddr_in *)&data->gd_addr;
391 if (data->gd_maxlen > NFS3_FHSIZE)
392 data->gd_maxlen = NFS3_FHSIZE;
393
394 res = (struct knfsd_fh*)buf;
395
396 exp_readlock();
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100397
398 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
399
400 clp = auth_unix_lookup(&in6);
401 if (!clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 err = -EPERM;
403 else {
404 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
405 auth_domain_put(clp);
406 }
407 exp_readunlock();
408 if (err == 0)
Andrew Morton12127492007-07-17 04:04:34 -0700409 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 out:
411 return err;
412}
413
Chuck Lever262a0982008-12-12 16:57:35 -0500414/**
415 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
416 *
417 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
418 * Function remains to support old versions of nfs-utils.
419 *
420 * Input:
421 * buf: struct nfsctl_fdparm
422 * gd_addr: socket address of client
423 * gd_path: '\0'-terminated C string
424 * containing pathname of
425 * directory in local file system
426 * gd_version: fdparm structure version
427 * size: size in bytes of passed in nfsctl_fdparm
428 * Output:
429 * On success: passed-in buffer filled with nfsctl_res
430 * (a fixed-length raw NFS file handle);
431 * return code is the size in bytes of the file handle
432 * On error: return code is negative errno value
433 *
434 * Note: Only AF_INET client addresses are passed in, since gd_addr
435 * is the same size as a struct sockaddr_in.
436 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437static ssize_t write_getfd(struct file *file, char *buf, size_t size)
438{
439 struct nfsctl_fdparm *data;
440 struct sockaddr_in *sin;
441 struct auth_domain *clp;
442 int err = 0;
443 struct knfsd_fh fh;
444 char *res;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100445 struct in6_addr in6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
447 if (size < sizeof(*data))
448 return -EINVAL;
449 data = (struct nfsctl_fdparm*)buf;
450 err = -EPROTONOSUPPORT;
451 if (data->gd_addr.sa_family != AF_INET)
452 goto out;
453 err = -EINVAL;
454 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
455 goto out;
456
457 res = buf;
458 sin = (struct sockaddr_in *)&data->gd_addr;
459 exp_readlock();
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100460
461 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
462
463 clp = auth_unix_lookup(&in6);
464 if (!clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 err = -EPERM;
466 else {
467 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
468 auth_domain_put(clp);
469 }
470 exp_readunlock();
471
472 if (err == 0) {
473 memset(res,0, NFS_FHSIZE);
474 memcpy(res, &fh.fh_base, fh.fh_size);
475 err = NFS_FHSIZE;
476 }
477 out:
478 return err;
479}
480
Chuck Lever262a0982008-12-12 16:57:35 -0500481/**
482 * write_unlock_ip - Release all locks used by a client
483 *
484 * Experimental.
485 *
486 * Input:
487 * buf: '\n'-terminated C string containing a
Chuck Lever41160922009-08-09 15:09:40 -0400488 * presentation format IP address
Chuck Lever262a0982008-12-12 16:57:35 -0500489 * size: length of C string in @buf
490 * Output:
491 * On success: returns zero if all specified locks were released;
492 * returns one if one or more locks were not released
493 * On error: return code is negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500494 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500495static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500496{
Chuck Lever41160922009-08-09 15:09:40 -0400497 struct sockaddr_storage address;
498 struct sockaddr *sap = (struct sockaddr *)&address;
499 size_t salen = sizeof(address);
Chuck Lever367c8c72008-06-30 18:58:14 -0400500 char *fo_path;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500501
502 /* sanity check */
503 if (size == 0)
504 return -EINVAL;
505
506 if (buf[size-1] != '\n')
507 return -EINVAL;
508
509 fo_path = buf;
510 if (qword_get(&buf, fo_path, size) < 0)
511 return -EINVAL;
512
Chuck Lever41160922009-08-09 15:09:40 -0400513 if (rpc_pton(fo_path, size, sap, salen) == 0)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500514 return -EINVAL;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500515
Chuck Lever41160922009-08-09 15:09:40 -0400516 return nlmsvc_unlock_all_by_ip(sap);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500517}
518
Chuck Lever262a0982008-12-12 16:57:35 -0500519/**
520 * write_unlock_fs - Release all locks on a local file system
521 *
522 * Experimental.
523 *
524 * Input:
525 * buf: '\n'-terminated C string containing the
526 * absolute pathname of a local file system
527 * size: length of C string in @buf
528 * Output:
529 * On success: returns zero if all specified locks were released;
530 * returns one if one or more locks were not released
531 * On error: return code is negative errno value
532 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500533static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
Wendy Cheng17efa372008-01-17 11:10:12 -0500534{
Al Viroa63bb992008-08-02 01:03:36 -0400535 struct path path;
Wendy Cheng17efa372008-01-17 11:10:12 -0500536 char *fo_path;
537 int error;
538
539 /* sanity check */
540 if (size == 0)
541 return -EINVAL;
542
543 if (buf[size-1] != '\n')
544 return -EINVAL;
545
546 fo_path = buf;
547 if (qword_get(&buf, fo_path, size) < 0)
548 return -EINVAL;
549
Al Viroa63bb992008-08-02 01:03:36 -0400550 error = kern_path(fo_path, 0, &path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500551 if (error)
552 return error;
553
Chuck Lever262a0982008-12-12 16:57:35 -0500554 /*
555 * XXX: Needs better sanity checking. Otherwise we could end up
556 * releasing locks on the wrong file system.
557 *
558 * For example:
559 * 1. Does the path refer to a directory?
560 * 2. Is that directory a mount point, or
561 * 3. Is that directory the root of an exported file system?
562 */
Al Viroa63bb992008-08-02 01:03:36 -0400563 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
Wendy Cheng17efa372008-01-17 11:10:12 -0500564
Al Viroa63bb992008-08-02 01:03:36 -0400565 path_put(&path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500566 return error;
567}
568
Chuck Lever262a0982008-12-12 16:57:35 -0500569/**
570 * write_filehandle - Get a variable-length NFS file handle by path
571 *
572 * On input, the buffer contains a '\n'-terminated C string comprised of
573 * three alphanumeric words separated by whitespace. The string may
574 * contain escape sequences.
575 *
576 * Input:
577 * buf:
578 * domain: client domain name
579 * path: export pathname
580 * maxsize: numeric maximum size of
581 * @buf
582 * size: length of C string in @buf
583 * Output:
584 * On success: passed-in buffer filled with '\n'-terminated C
585 * string containing a ASCII hex text version
586 * of the NFS file handle;
587 * return code is the size in bytes of the string
588 * On error: return code is negative errno value
589 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
591{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700593 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 char *mesg = buf;
595 int len;
596 struct auth_domain *dom;
597 struct knfsd_fh fh;
598
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500599 if (size == 0)
600 return -EINVAL;
601
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 if (buf[size-1] != '\n')
603 return -EINVAL;
604 buf[size-1] = 0;
605
606 dname = mesg;
607 len = qword_get(&mesg, dname, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500608 if (len <= 0)
609 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
611 path = dname+len+1;
612 len = qword_get(&mesg, path, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500613 if (len <= 0)
614 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616 len = get_int(&mesg, &maxsize);
617 if (len)
618 return len;
619
620 if (maxsize < NFS_FHSIZE)
621 return -EINVAL;
622 if (maxsize > NFS3_FHSIZE)
623 maxsize = NFS3_FHSIZE;
624
625 if (qword_get(&mesg, mesg, size)>0)
626 return -EINVAL;
627
628 /* we have all the words, they are in buf.. */
629 dom = unix_domain_find(dname);
630 if (!dom)
631 return -ENOMEM;
632
633 len = exp_rootfh(dom, path, &fh, maxsize);
634 auth_domain_put(dom);
635 if (len)
636 return len;
637
Chuck Lever54224f02008-12-12 16:57:20 -0500638 mesg = buf;
639 len = SIMPLE_TRANSACTION_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
641 mesg[-1] = '\n';
642 return mesg - buf;
643}
644
Chuck Lever262a0982008-12-12 16:57:35 -0500645/**
646 * write_threads - Start NFSD, or report the current number of running threads
647 *
648 * Input:
649 * buf: ignored
650 * size: zero
651 * Output:
652 * On success: passed-in buffer filled with '\n'-terminated C
653 * string numeric value representing the number of
654 * running NFSD threads;
655 * return code is the size in bytes of the string
656 * On error: return code is zero
657 *
658 * OR
659 *
660 * Input:
661 * buf: C string containing an unsigned
662 * integer value representing the
663 * number of NFSD threads to start
664 * size: non-zero length of C string in @buf
665 * Output:
666 * On success: NFS service is started;
667 * passed-in buffer filled with '\n'-terminated C
668 * string numeric value representing the number of
669 * running NFSD threads;
670 * return code is the size in bytes of the string
671 * On error: return code is zero or a negative errno value
672 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673static ssize_t write_threads(struct file *file, char *buf, size_t size)
674{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 char *mesg = buf;
676 int rv;
677 if (size > 0) {
678 int newthreads;
679 rv = get_int(&mesg, &newthreads);
680 if (rv)
681 return rv;
Chuck Lever9e074852008-12-12 16:57:27 -0500682 if (newthreads < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 return -EINVAL;
Chuck Lever9e074852008-12-12 16:57:27 -0500684 rv = nfsd_svc(NFS_PORT, newthreads);
NeilBrown82e12fe2009-06-16 11:03:07 +1000685 if (rv < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 return rv;
NeilBrown82e12fe2009-06-16 11:03:07 +1000687 } else
688 rv = nfsd_nrthreads();
Chuck Levere06b6402009-04-23 19:33:25 -0400689
NeilBrown82e12fe2009-06-16 11:03:07 +1000690 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691}
692
Chuck Lever262a0982008-12-12 16:57:35 -0500693/**
694 * write_pool_threads - Set or report the current number of threads per pool
695 *
696 * Input:
697 * buf: ignored
698 * size: zero
699 *
700 * OR
701 *
702 * Input:
703 * buf: C string containing whitespace-
704 * separated unsigned integer values
705 * representing the number of NFSD
706 * threads to start in each pool
707 * size: non-zero length of C string in @buf
708 * Output:
709 * On success: passed-in buffer filled with '\n'-terminated C
710 * string containing integer values representing the
711 * number of NFSD threads in each pool;
712 * return code is the size in bytes of the string
713 * On error: return code is zero or a negative errno value
714 */
Greg Bankseed29652006-10-02 02:18:02 -0700715static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
716{
717 /* if size > 0, look for an array of number of threads per node
718 * and apply them then write out number of threads per node as reply
719 */
720 char *mesg = buf;
721 int i;
722 int rv;
723 int len;
Neil Brownbedbdd82008-06-10 08:40:35 -0400724 int npools;
Greg Bankseed29652006-10-02 02:18:02 -0700725 int *nthreads;
726
Neil Brownbedbdd82008-06-10 08:40:35 -0400727 mutex_lock(&nfsd_mutex);
728 npools = nfsd_nrpools();
Greg Bankseed29652006-10-02 02:18:02 -0700729 if (npools == 0) {
730 /*
731 * NFS is shut down. The admin can start it by
732 * writing to the threads file but NOT the pool_threads
733 * file, sorry. Report zero threads.
734 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400735 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700736 strcpy(buf, "0\n");
737 return strlen(buf);
738 }
739
740 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
Neil Brownbedbdd82008-06-10 08:40:35 -0400741 rv = -ENOMEM;
Greg Bankseed29652006-10-02 02:18:02 -0700742 if (nthreads == NULL)
Neil Brownbedbdd82008-06-10 08:40:35 -0400743 goto out_free;
Greg Bankseed29652006-10-02 02:18:02 -0700744
745 if (size > 0) {
746 for (i = 0; i < npools; i++) {
747 rv = get_int(&mesg, &nthreads[i]);
748 if (rv == -ENOENT)
749 break; /* fewer numbers than pools */
750 if (rv)
751 goto out_free; /* syntax error */
752 rv = -EINVAL;
753 if (nthreads[i] < 0)
754 goto out_free;
755 }
756 rv = nfsd_set_nrthreads(i, nthreads);
757 if (rv)
758 goto out_free;
759 }
760
761 rv = nfsd_get_nrthreads(npools, nthreads);
762 if (rv)
763 goto out_free;
764
765 mesg = buf;
766 size = SIMPLE_TRANSACTION_LIMIT;
767 for (i = 0; i < npools && size > 0; i++) {
768 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
769 len = strlen(mesg);
770 size -= len;
771 mesg += len;
772 }
J. Bruce Fields413d63d2009-07-28 11:37:25 -0400773 rv = mesg - buf;
Greg Bankseed29652006-10-02 02:18:02 -0700774out_free:
775 kfree(nthreads);
Neil Brownbedbdd82008-06-10 08:40:35 -0400776 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700777 return rv;
778}
779
Jeff Layton3dd98a32008-06-10 08:40:36 -0400780static ssize_t __write_versions(struct file *file, char *buf, size_t size)
NeilBrown70c3b762005-11-07 01:00:25 -0800781{
NeilBrown70c3b762005-11-07 01:00:25 -0800782 char *mesg = buf;
Benny Halevy8daf2202009-04-03 08:28:59 +0300783 char *vers, *minorp, sign;
Chuck Lever261758b2009-04-23 19:33:18 -0400784 int len, num, remaining;
Benny Halevy8daf2202009-04-03 08:28:59 +0300785 unsigned minor;
NeilBrown70c3b762005-11-07 01:00:25 -0800786 ssize_t tlen = 0;
787 char *sep;
788
789 if (size>0) {
790 if (nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700791 /* Cannot change versions without updating
792 * nfsd_serv->sv_xdrsize, and reallocing
793 * rq_argp and rq_resp
794 */
NeilBrown70c3b762005-11-07 01:00:25 -0800795 return -EBUSY;
796 if (buf[size-1] != '\n')
797 return -EINVAL;
798 buf[size-1] = 0;
799
800 vers = mesg;
801 len = qword_get(&mesg, vers, size);
802 if (len <= 0) return -EINVAL;
803 do {
804 sign = *vers;
805 if (sign == '+' || sign == '-')
Benny Halevy8daf2202009-04-03 08:28:59 +0300806 num = simple_strtol((vers+1), &minorp, 0);
NeilBrown70c3b762005-11-07 01:00:25 -0800807 else
Benny Halevy8daf2202009-04-03 08:28:59 +0300808 num = simple_strtol(vers, &minorp, 0);
809 if (*minorp == '.') {
810 if (num < 4)
811 return -EINVAL;
812 minor = simple_strtoul(minorp+1, NULL, 0);
813 if (minor == 0)
814 return -EINVAL;
815 if (nfsd_minorversion(minor, sign == '-' ?
816 NFSD_CLEAR : NFSD_SET) < 0)
817 return -EINVAL;
818 goto next;
819 }
NeilBrown70c3b762005-11-07 01:00:25 -0800820 switch(num) {
821 case 2:
822 case 3:
823 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700824 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800825 break;
826 default:
827 return -EINVAL;
828 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300829 next:
NeilBrown70c3b762005-11-07 01:00:25 -0800830 vers += len + 1;
NeilBrown70c3b762005-11-07 01:00:25 -0800831 } while ((len = qword_get(&mesg, vers, size)) > 0);
832 /* If all get turned off, turn them back on, as
833 * having no versions is BAD
834 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700835 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800836 }
Chuck Lever261758b2009-04-23 19:33:18 -0400837
NeilBrown70c3b762005-11-07 01:00:25 -0800838 /* Now write current state into reply buffer */
839 len = 0;
840 sep = "";
Chuck Lever261758b2009-04-23 19:33:18 -0400841 remaining = SIMPLE_TRANSACTION_LIMIT;
NeilBrown70c3b762005-11-07 01:00:25 -0800842 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700843 if (nfsd_vers(num, NFSD_AVAIL)) {
Chuck Lever261758b2009-04-23 19:33:18 -0400844 len = snprintf(buf, remaining, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700845 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800846 num);
847 sep = " ";
Chuck Lever261758b2009-04-23 19:33:18 -0400848
849 if (len > remaining)
850 break;
851 remaining -= len;
852 buf += len;
853 tlen += len;
NeilBrown70c3b762005-11-07 01:00:25 -0800854 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300855 if (nfsd_vers(4, NFSD_AVAIL))
Chuck Lever261758b2009-04-23 19:33:18 -0400856 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
857 minor++) {
858 len = snprintf(buf, remaining, " %c4.%u",
Benny Halevy8daf2202009-04-03 08:28:59 +0300859 (nfsd_vers(4, NFSD_TEST) &&
860 nfsd_minorversion(minor, NFSD_TEST)) ?
861 '+' : '-',
862 minor);
Chuck Lever261758b2009-04-23 19:33:18 -0400863
864 if (len > remaining)
865 break;
866 remaining -= len;
867 buf += len;
868 tlen += len;
869 }
870
871 len = snprintf(buf, remaining, "\n");
872 if (len > remaining)
873 return -EINVAL;
874 return tlen + len;
NeilBrown70c3b762005-11-07 01:00:25 -0800875}
876
Chuck Lever262a0982008-12-12 16:57:35 -0500877/**
878 * write_versions - Set or report the available NFS protocol versions
879 *
880 * Input:
881 * buf: ignored
882 * size: zero
883 * Output:
884 * On success: passed-in buffer filled with '\n'-terminated C
885 * string containing positive or negative integer
886 * values representing the current status of each
887 * protocol version;
888 * return code is the size in bytes of the string
889 * On error: return code is zero or a negative errno value
890 *
891 * OR
892 *
893 * Input:
894 * buf: C string containing whitespace-
895 * separated positive or negative
896 * integer values representing NFS
897 * protocol versions to enable ("+n")
898 * or disable ("-n")
899 * size: non-zero length of C string in @buf
900 * Output:
901 * On success: status of zero or more protocol versions has
902 * been updated; passed-in buffer filled with
903 * '\n'-terminated C string containing positive
904 * or negative integer values representing the
905 * current status of each protocol version;
906 * return code is the size in bytes of the string
907 * On error: return code is zero or a negative errno value
908 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400909static ssize_t write_versions(struct file *file, char *buf, size_t size)
910{
911 ssize_t rv;
912
913 mutex_lock(&nfsd_mutex);
914 rv = __write_versions(file, buf, size);
915 mutex_unlock(&nfsd_mutex);
916 return rv;
917}
918
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400919/*
Chuck Lever0a5372d2009-04-23 19:32:10 -0400920 * Zero-length write. Return a list of NFSD's current listener
921 * transports.
922 */
923static ssize_t __write_ports_names(char *buf)
924{
925 if (nfsd_serv == NULL)
926 return 0;
Chuck Lever335c54b2009-04-23 19:32:25 -0400927 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Lever0a5372d2009-04-23 19:32:10 -0400928}
929
930/*
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400931 * A single 'fd' number was written, in which case it must be for
932 * a socket of a supported family/protocol, and we use it as an
933 * nfsd listener.
934 */
935static ssize_t __write_ports_addfd(char *buf)
936{
937 char *mesg = buf;
938 int fd, err;
939
940 err = get_int(&mesg, &fd);
941 if (err != 0 || fd < 0)
942 return -EINVAL;
943
944 err = nfsd_create_serv();
945 if (err != 0)
946 return err;
947
Chuck Leverea068ba2009-04-23 19:32:18 -0400948 err = lockd_up();
949 if (err != 0)
950 goto out;
951
Chuck Leverbfba9ab2009-04-23 19:32:33 -0400952 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Leverea068ba2009-04-23 19:32:18 -0400953 if (err < 0)
954 lockd_down();
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400955
Chuck Leverea068ba2009-04-23 19:32:18 -0400956out:
957 /* Decrease the count, but don't shut down the service */
958 nfsd_serv->sv_nrthreads--;
959 return err;
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400960}
961
962/*
Chuck Lever82d56592009-04-23 19:31:48 -0400963 * A '-' followed by the 'name' of a socket means we close the socket.
964 */
965static ssize_t __write_ports_delfd(char *buf)
966{
967 char *toclose;
968 int len = 0;
969
970 toclose = kstrdup(buf + 1, GFP_KERNEL);
971 if (toclose == NULL)
972 return -ENOMEM;
973
974 if (nfsd_serv != NULL)
Chuck Lever8435d342009-04-23 19:32:40 -0400975 len = svc_sock_names(nfsd_serv, buf,
976 SIMPLE_TRANSACTION_LIMIT, toclose);
Chuck Lever82d56592009-04-23 19:31:48 -0400977 if (len >= 0)
978 lockd_down();
979
980 kfree(toclose);
981 return len;
982}
983
984/*
Chuck Lever4eb68c22009-04-23 19:31:40 -0400985 * A transport listener is added by writing it's transport name and
986 * a port number.
987 */
988static ssize_t __write_ports_addxprt(char *buf)
989{
990 char transport[16];
Chuck Lever37498292010-01-26 14:04:22 -0500991 struct svc_xprt *xprt;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400992 int port, err;
993
994 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
995 return -EINVAL;
996
997 if (port < 1 || port > USHORT_MAX)
998 return -EINVAL;
999
1000 err = nfsd_create_serv();
1001 if (err != 0)
1002 return err;
1003
1004 err = svc_create_xprt(nfsd_serv, transport,
1005 PF_INET, port, SVC_SOCK_ANONYMOUS);
Chuck Lever68717902010-01-26 14:04:13 -05001006 if (err < 0)
Chuck Lever37498292010-01-26 14:04:22 -05001007 goto out_err;
1008
1009 err = svc_create_xprt(nfsd_serv, transport,
1010 PF_INET6, port, SVC_SOCK_ANONYMOUS);
1011 if (err < 0 && err != -EAFNOSUPPORT)
1012 goto out_close;
Chuck Lever4eb68c22009-04-23 19:31:40 -04001013 return 0;
Chuck Lever37498292010-01-26 14:04:22 -05001014out_close:
1015 xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
1016 if (xprt != NULL) {
1017 svc_close_xprt(xprt);
1018 svc_xprt_put(xprt);
1019 }
1020out_err:
1021 /* Decrease the count, but don't shut down the service */
1022 nfsd_serv->sv_nrthreads--;
1023 return err;
Chuck Lever4eb68c22009-04-23 19:31:40 -04001024}
1025
1026/*
Chuck Lever4cd5dc72009-04-23 19:31:32 -04001027 * A transport listener is removed by writing a "-", it's transport
1028 * name, and it's port number.
1029 */
1030static ssize_t __write_ports_delxprt(char *buf)
1031{
1032 struct svc_xprt *xprt;
1033 char transport[16];
1034 int port;
1035
1036 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
1037 return -EINVAL;
1038
1039 if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL)
1040 return -EINVAL;
1041
1042 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
1043 if (xprt == NULL)
1044 return -ENOTCONN;
1045
1046 svc_close_xprt(xprt);
1047 svc_xprt_put(xprt);
1048 return 0;
1049}
1050
Neil Brownbedbdd82008-06-10 08:40:35 -04001051static ssize_t __write_ports(struct file *file, char *buf, size_t size)
NeilBrown80212d52006-10-02 02:17:47 -07001052{
Chuck Lever0a5372d2009-04-23 19:32:10 -04001053 if (size == 0)
1054 return __write_ports_names(buf);
Chuck Lever0b7c2f62009-04-23 19:31:55 -04001055
1056 if (isdigit(buf[0]))
1057 return __write_ports_addfd(buf);
Chuck Lever82d56592009-04-23 19:31:48 -04001058
1059 if (buf[0] == '-' && isdigit(buf[1]))
1060 return __write_ports_delfd(buf);
Chuck Lever4eb68c22009-04-23 19:31:40 -04001061
1062 if (isalpha(buf[0]))
1063 return __write_ports_addxprt(buf);
Chuck Lever4cd5dc72009-04-23 19:31:32 -04001064
1065 if (buf[0] == '-' && isalpha(buf[1]))
1066 return __write_ports_delxprt(buf);
1067
NeilBrownb41b66d2006-10-02 02:17:48 -07001068 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -07001069}
1070
Chuck Lever262a0982008-12-12 16:57:35 -05001071/**
1072 * write_ports - Pass a socket file descriptor or transport name to listen on
1073 *
1074 * Input:
1075 * buf: ignored
1076 * size: zero
1077 * Output:
1078 * On success: passed-in buffer filled with a '\n'-terminated C
1079 * string containing a whitespace-separated list of
1080 * named NFSD listeners;
1081 * return code is the size in bytes of the string
1082 * On error: return code is zero or a negative errno value
1083 *
1084 * OR
1085 *
1086 * Input:
1087 * buf: C string containing an unsigned
1088 * integer value representing a bound
1089 * but unconnected socket that is to be
Chuck Leverc71206a2009-04-23 19:32:03 -04001090 * used as an NFSD listener; listen(3)
1091 * must be called for a SOCK_STREAM
1092 * socket, otherwise it is ignored
Chuck Lever262a0982008-12-12 16:57:35 -05001093 * size: non-zero length of C string in @buf
1094 * Output:
1095 * On success: NFS service is started;
1096 * passed-in buffer filled with a '\n'-terminated C
1097 * string containing a unique alphanumeric name of
1098 * the listener;
1099 * return code is the size in bytes of the string
1100 * On error: return code is a negative errno value
1101 *
1102 * OR
1103 *
1104 * Input:
1105 * buf: C string containing a "-" followed
1106 * by an integer value representing a
1107 * previously passed in socket file
1108 * descriptor
1109 * size: non-zero length of C string in @buf
1110 * Output:
1111 * On success: NFS service no longer listens on that socket;
1112 * passed-in buffer filled with a '\n'-terminated C
1113 * string containing a unique name of the listener;
1114 * return code is the size in bytes of the string
1115 * On error: return code is a negative errno value
1116 *
1117 * OR
1118 *
1119 * Input:
1120 * buf: C string containing a transport
1121 * name and an unsigned integer value
1122 * representing the port to listen on,
1123 * separated by whitespace
1124 * size: non-zero length of C string in @buf
1125 * Output:
1126 * On success: returns zero; NFS service is started
1127 * On error: return code is a negative errno value
1128 *
1129 * OR
1130 *
1131 * Input:
1132 * buf: C string containing a "-" followed
1133 * by a transport name and an unsigned
1134 * integer value representing the port
1135 * to listen on, separated by whitespace
1136 * size: non-zero length of C string in @buf
1137 * Output:
1138 * On success: returns zero; NFS service no longer listens
1139 * on that transport
1140 * On error: return code is a negative errno value
1141 */
Neil Brownbedbdd82008-06-10 08:40:35 -04001142static ssize_t write_ports(struct file *file, char *buf, size_t size)
1143{
1144 ssize_t rv;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001145
Neil Brownbedbdd82008-06-10 08:40:35 -04001146 mutex_lock(&nfsd_mutex);
1147 rv = __write_ports(file, buf, size);
1148 mutex_unlock(&nfsd_mutex);
1149 return rv;
1150}
1151
1152
NeilBrown596bbe52006-10-04 02:15:48 -07001153int nfsd_max_blksize;
1154
Chuck Lever262a0982008-12-12 16:57:35 -05001155/**
1156 * write_maxblksize - Set or report the current NFS blksize
1157 *
1158 * Input:
1159 * buf: ignored
1160 * size: zero
1161 *
1162 * OR
1163 *
1164 * Input:
1165 * buf: C string containing an unsigned
1166 * integer value representing the new
1167 * NFS blksize
1168 * size: non-zero length of C string in @buf
1169 * Output:
1170 * On success: passed-in buffer filled with '\n'-terminated C string
1171 * containing numeric value of the current NFS blksize
1172 * setting;
1173 * return code is the size in bytes of the string
1174 * On error: return code is zero or a negative errno value
1175 */
NeilBrown596bbe52006-10-04 02:15:48 -07001176static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
1177{
1178 char *mesg = buf;
1179 if (size > 0) {
1180 int bsize;
1181 int rv = get_int(&mesg, &bsize);
1182 if (rv)
1183 return rv;
1184 /* force bsize into allowed range and
1185 * required alignment.
1186 */
1187 if (bsize < 1024)
1188 bsize = 1024;
1189 if (bsize > NFSSVC_MAXBLKSIZE)
1190 bsize = NFSSVC_MAXBLKSIZE;
1191 bsize &= ~(1024-1);
Neil Brownbedbdd82008-06-10 08:40:35 -04001192 mutex_lock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -07001193 if (nfsd_serv && nfsd_serv->sv_nrthreads) {
Neil Brownbedbdd82008-06-10 08:40:35 -04001194 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -07001195 return -EBUSY;
1196 }
1197 nfsd_max_blksize = bsize;
Neil Brownbedbdd82008-06-10 08:40:35 -04001198 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -07001199 }
Chuck Levere06b6402009-04-23 19:33:25 -04001200
1201 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
1202 nfsd_max_blksize);
NeilBrown596bbe52006-10-04 02:15:48 -07001203}
1204
NeilBrown70c3b762005-11-07 01:00:25 -08001205#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206extern time_t nfs4_leasetime(void);
1207
Jeff Layton3dd98a32008-06-10 08:40:36 -04001208static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209{
1210 /* if size > 10 seconds, call
1211 * nfs4_reset_lease() then write out the new lease (seconds) as reply
1212 */
1213 char *mesg = buf;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001214 int rv, lease;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
1216 if (size > 0) {
Jeff Layton3dd98a32008-06-10 08:40:36 -04001217 if (nfsd_serv)
1218 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 rv = get_int(&mesg, &lease);
1220 if (rv)
1221 return rv;
1222 if (lease < 10 || lease > 3600)
1223 return -EINVAL;
1224 nfs4_reset_lease(lease);
1225 }
Chuck Levere06b6402009-04-23 19:33:25 -04001226
1227 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n",
1228 nfs4_lease_time());
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229}
1230
Chuck Lever262a0982008-12-12 16:57:35 -05001231/**
1232 * write_leasetime - Set or report the current NFSv4 lease time
1233 *
1234 * Input:
1235 * buf: ignored
1236 * size: zero
1237 *
1238 * OR
1239 *
1240 * Input:
1241 * buf: C string containing an unsigned
1242 * integer value representing the new
1243 * NFSv4 lease expiry time
1244 * size: non-zero length of C string in @buf
1245 * Output:
1246 * On success: passed-in buffer filled with '\n'-terminated C
1247 * string containing unsigned integer value of the
1248 * current lease expiry time;
1249 * return code is the size in bytes of the string
1250 * On error: return code is zero or a negative errno value
1251 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001252static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
1253{
1254 ssize_t rv;
1255
1256 mutex_lock(&nfsd_mutex);
1257 rv = __write_leasetime(file, buf, size);
1258 mutex_unlock(&nfsd_mutex);
1259 return rv;
1260}
1261
1262extern char *nfs4_recoverydir(void);
1263
1264static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
NeilBrown0964a3d2005-06-23 22:04:32 -07001265{
1266 char *mesg = buf;
1267 char *recdir;
1268 int len, status;
1269
Jeff Layton3dd98a32008-06-10 08:40:36 -04001270 if (size > 0) {
1271 if (nfsd_serv)
1272 return -EBUSY;
1273 if (size > PATH_MAX || buf[size-1] != '\n')
1274 return -EINVAL;
1275 buf[size-1] = 0;
NeilBrown0964a3d2005-06-23 22:04:32 -07001276
Jeff Layton3dd98a32008-06-10 08:40:36 -04001277 recdir = mesg;
1278 len = qword_get(&mesg, recdir, size);
1279 if (len <= 0)
1280 return -EINVAL;
NeilBrown0964a3d2005-06-23 22:04:32 -07001281
Jeff Layton3dd98a32008-06-10 08:40:36 -04001282 status = nfs4_reset_recoverydir(recdir);
1283 }
Chuck Lever3d72ab82009-04-23 19:33:10 -04001284
1285 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1286 nfs4_recoverydir());
NeilBrown0964a3d2005-06-23 22:04:32 -07001287}
Jeff Layton3dd98a32008-06-10 08:40:36 -04001288
Chuck Lever262a0982008-12-12 16:57:35 -05001289/**
1290 * write_recoverydir - Set or report the pathname of the recovery directory
1291 *
1292 * Input:
1293 * buf: ignored
1294 * size: zero
1295 *
1296 * OR
1297 *
1298 * Input:
1299 * buf: C string containing the pathname
1300 * of the directory on a local file
1301 * system containing permanent NFSv4
1302 * recovery data
1303 * size: non-zero length of C string in @buf
1304 * Output:
1305 * On success: passed-in buffer filled with '\n'-terminated C string
1306 * containing the current recovery pathname setting;
1307 * return code is the size in bytes of the string
1308 * On error: return code is zero or a negative errno value
1309 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001310static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1311{
1312 ssize_t rv;
1313
1314 mutex_lock(&nfsd_mutex);
1315 rv = __write_recoverydir(file, buf, size);
1316 mutex_unlock(&nfsd_mutex);
1317 return rv;
1318}
1319
NeilBrown70c3b762005-11-07 01:00:25 -08001320#endif
NeilBrown0964a3d2005-06-23 22:04:32 -07001321
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322/*----------------------------------------------------------------------------*/
1323/*
1324 * populating the filesystem.
1325 */
1326
1327static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1328{
1329 static struct tree_descr nfsd_files[] = {
1330 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
1331 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
1332 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
1333 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
1334 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
1335 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
1336 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
1337 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
J. Bruce Fieldse8e87532009-12-14 12:53:32 -05001338 [NFSD_Export_features] = {"export_features",
1339 &export_features_operations, S_IRUGO},
Wendy Cheng4373ea82008-01-17 11:10:12 -05001340 [NFSD_FO_UnlockIP] = {"unlock_ip",
1341 &transaction_ops, S_IWUSR|S_IRUSR},
Wendy Cheng17efa372008-01-17 11:10:12 -05001342 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1343 &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1345 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -07001346 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Banks03cf6c92009-01-13 21:26:36 +11001347 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
NeilBrown70c3b762005-11-07 01:00:25 -08001348 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -07001349 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -07001350 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351#ifdef CONFIG_NFSD_V4
1352 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -07001353 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354#endif
1355 /* last one */ {""}
1356 };
1357 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1358}
1359
David Howells454e2392006-06-23 02:02:57 -07001360static int nfsd_get_sb(struct file_system_type *fs_type,
1361 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362{
David Howells454e2392006-06-23 02:02:57 -07001363 return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364}
1365
1366static struct file_system_type nfsd_fs_type = {
1367 .owner = THIS_MODULE,
1368 .name = "nfsd",
1369 .get_sb = nfsd_get_sb,
1370 .kill_sb = kill_litter_super,
1371};
1372
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001373#ifdef CONFIG_PROC_FS
1374static int create_proc_exports_entry(void)
1375{
1376 struct proc_dir_entry *entry;
1377
1378 entry = proc_mkdir("fs/nfs", NULL);
1379 if (!entry)
1380 return -ENOMEM;
Denis V. Lunev9ef2db22008-04-29 01:02:04 -07001381 entry = proc_create("exports", 0, entry, &exports_operations);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001382 if (!entry)
1383 return -ENOMEM;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001384 return 0;
1385}
1386#else /* CONFIG_PROC_FS */
1387static int create_proc_exports_entry(void)
1388{
1389 return 0;
1390}
1391#endif
1392
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393static int __init init_nfsd(void)
1394{
1395 int retval;
1396 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1397
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001398 retval = nfs4_state_init(); /* nfs4 locking state */
1399 if (retval)
1400 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001402 retval = nfsd_reply_cache_init();
1403 if (retval)
1404 goto out_free_stat;
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001405 retval = nfsd_export_init();
1406 if (retval)
1407 goto out_free_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001409 retval = nfsd_idmap_init();
1410 if (retval)
1411 goto out_free_lockd;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001412 retval = create_proc_exports_entry();
1413 if (retval)
1414 goto out_free_idmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -05001416 if (retval)
1417 goto out_free_all;
1418 return 0;
1419out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001420 remove_proc_entry("fs/nfs/exports", NULL);
1421 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001422out_free_idmap:
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001423 nfsd_idmap_shutdown();
1424out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001425 nfsd_lockd_shutdown();
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001426 nfsd_export_shutdown();
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001427out_free_cache:
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001428 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001429out_free_stat:
1430 nfsd_stat_shutdown();
J. Bruce Fields26808d32007-11-09 13:44:06 -05001431 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 return retval;
1433}
1434
1435static void __exit exit_nfsd(void)
1436{
1437 nfsd_export_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001438 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 remove_proc_entry("fs/nfs/exports", NULL);
1440 remove_proc_entry("fs/nfs", NULL);
1441 nfsd_stat_shutdown();
1442 nfsd_lockd_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 nfsd_idmap_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001444 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445 unregister_filesystem(&nfsd_fs_type);
1446}
1447
1448MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1449MODULE_LICENSE("GPL");
1450module_init(init_nfsd)
1451module_exit(exit_nfsd)