blob: c7716143cbd1df17c79aeedc184006d7672ccacc [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
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09007#include <linux/slab.h>
Al Viro3f8206d2008-07-26 03:46:43 -04008#include <linux/namei.h>
NeilBrownb41b66d2006-10-02 02:17:48 -07009#include <linux/ctype.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010
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>
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050015#include <linux/sunrpc/gss_api.h>
J. Bruce Fieldsb084f592011-05-31 12:24:58 -040016#include <linux/sunrpc/gss_krb5_enctypes.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050018#include "idmap.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020019#include "nfsd.h"
20#include "cache.h"
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022/*
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050023 * We have a single directory with several nodes in it.
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 */
25enum {
26 NFSD_Root = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 NFSD_List,
J. Bruce Fieldse8e87532009-12-14 12:53:32 -050028 NFSD_Export_features,
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 NFSD_Fh,
Wendy Cheng4373ea82008-01-17 11:10:12 -050030 NFSD_FO_UnlockIP,
Wendy Cheng17efa372008-01-17 11:10:12 -050031 NFSD_FO_UnlockFS,
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 NFSD_Threads,
Greg Bankseed29652006-10-02 02:18:02 -070033 NFSD_Pool_Threads,
Greg Banks03cf6c92009-01-13 21:26:36 +110034 NFSD_Pool_Stats,
NeilBrown70c3b762005-11-07 01:00:25 -080035 NFSD_Versions,
NeilBrown80212d52006-10-02 02:17:47 -070036 NFSD_Ports,
NeilBrown596bbe52006-10-04 02:15:48 -070037 NFSD_MaxBlkSize,
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050038 NFSD_SupportedEnctypes,
NeilBrown70c3b762005-11-07 01:00:25 -080039 /*
40 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
41 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
42 */
43#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 NFSD_Leasetime,
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -050045 NFSD_Gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070046 NFSD_RecoveryDir,
NeilBrown70c3b762005-11-07 01:00:25 -080047#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070048};
49
50/*
51 * write() for these nodes.
52 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070053static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
Chuck Leverb046ccd2008-12-12 16:57:13 -050054static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
55static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056static ssize_t write_threads(struct file *file, char *buf, size_t size);
Greg Bankseed29652006-10-02 02:18:02 -070057static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080058static ssize_t write_versions(struct file *file, char *buf, size_t size);
NeilBrown80212d52006-10-02 02:17:47 -070059static ssize_t write_ports(struct file *file, char *buf, size_t size);
NeilBrown596bbe52006-10-04 02:15:48 -070060static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080061#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070062static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -050063static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
NeilBrown0964a3d2005-06-23 22:04:32 -070064static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080065#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67static ssize_t (*write_op[])(struct file *, char *, size_t) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 [NFSD_Fh] = write_filehandle,
Chuck Leverb046ccd2008-12-12 16:57:13 -050069 [NFSD_FO_UnlockIP] = write_unlock_ip,
70 [NFSD_FO_UnlockFS] = write_unlock_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 [NFSD_Threads] = write_threads,
Greg Bankseed29652006-10-02 02:18:02 -070072 [NFSD_Pool_Threads] = write_pool_threads,
NeilBrown70c3b762005-11-07 01:00:25 -080073 [NFSD_Versions] = write_versions,
NeilBrown80212d52006-10-02 02:17:47 -070074 [NFSD_Ports] = write_ports,
NeilBrown596bbe52006-10-04 02:15:48 -070075 [NFSD_MaxBlkSize] = write_maxblksize,
NeilBrown70c3b762005-11-07 01:00:25 -080076#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 [NFSD_Leasetime] = write_leasetime,
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -050078 [NFSD_Gracetime] = write_gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070079 [NFSD_RecoveryDir] = write_recoverydir,
NeilBrown70c3b762005-11-07 01:00:25 -080080#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070081};
82
83static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
84{
Josef "Jeff" Sipek7eaa36e2006-12-08 02:36:41 -080085 ino_t ino = file->f_path.dentry->d_inode->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 char *data;
87 ssize_t rv;
88
Tobias Klausere8c96f82006-03-24 03:15:34 -080089 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 return -EINVAL;
91
92 data = simple_transaction_get(file, buf, size);
93 if (IS_ERR(data))
94 return PTR_ERR(data);
95
96 rv = write_op[ino](file, data, size);
NeilBrown8971a102007-02-14 00:33:11 -080097 if (rv >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 simple_transaction_set(file, rv);
99 rv = size;
100 }
101 return rv;
102}
103
NeilBrown73900222005-11-07 01:00:24 -0800104static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
105{
106 if (! file->private_data) {
107 /* An attempt to read a transaction file without writing
108 * causes a 0-byte write so that the file can return
109 * state information
110 */
111 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
112 if (rv < 0)
113 return rv;
114 }
115 return simple_transaction_read(file, buf, size, pos);
116}
117
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800118static const struct file_operations transaction_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 .write = nfsctl_transaction_write,
NeilBrown73900222005-11-07 01:00:24 -0800120 .read = nfsctl_transaction_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 .release = simple_transaction_release,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200122 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123};
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125static int exports_open(struct inode *inode, struct file *file)
126{
127 return seq_open(file, &nfs_exports_op);
128}
129
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800130static const struct file_operations exports_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 .open = exports_open,
132 .read = seq_read,
133 .llseek = seq_lseek,
134 .release = seq_release,
Denis V. Lunev9ef2db22008-04-29 01:02:04 -0700135 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136};
137
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500138static int export_features_show(struct seq_file *m, void *v)
139{
140 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
141 return 0;
142}
143
144static int export_features_open(struct inode *inode, struct file *file)
145{
146 return single_open(file, export_features_show, NULL);
147}
148
149static struct file_operations export_features_operations = {
150 .open = export_features_open,
151 .read = seq_read,
152 .llseek = seq_lseek,
153 .release = single_release,
154};
155
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400156#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500157static int supported_enctypes_show(struct seq_file *m, void *v)
158{
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400159 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500160 return 0;
161}
162
163static int supported_enctypes_open(struct inode *inode, struct file *file)
164{
165 return single_open(file, supported_enctypes_show, NULL);
166}
167
168static struct file_operations supported_enctypes_ops = {
169 .open = supported_enctypes_open,
170 .read = seq_read,
171 .llseek = seq_lseek,
172 .release = single_release,
173};
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400174#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500175
Greg Banks03cf6c92009-01-13 21:26:36 +1100176extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900177extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
Greg Banks03cf6c92009-01-13 21:26:36 +1100178
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700179static const struct file_operations pool_stats_operations = {
Greg Banks03cf6c92009-01-13 21:26:36 +1100180 .open = nfsd_pool_stats_open,
181 .read = seq_read,
182 .llseek = seq_lseek,
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900183 .release = nfsd_pool_stats_release,
Greg Banks03cf6c92009-01-13 21:26:36 +1100184 .owner = THIS_MODULE,
185};
186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187/*----------------------------------------------------------------------------*/
188/*
189 * payload - write methods
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 */
191
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Chuck Lever262a0982008-12-12 16:57:35 -0500193/**
194 * write_unlock_ip - Release all locks used by a client
195 *
196 * Experimental.
197 *
198 * Input:
199 * buf: '\n'-terminated C string containing a
Chuck Lever41160922009-08-09 15:09:40 -0400200 * presentation format IP address
Chuck Lever262a0982008-12-12 16:57:35 -0500201 * size: length of C string in @buf
202 * Output:
203 * On success: returns zero if all specified locks were released;
204 * returns one if one or more locks were not released
205 * On error: return code is negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500206 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500207static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500208{
Chuck Lever41160922009-08-09 15:09:40 -0400209 struct sockaddr_storage address;
210 struct sockaddr *sap = (struct sockaddr *)&address;
211 size_t salen = sizeof(address);
Chuck Lever367c8c72008-06-30 18:58:14 -0400212 char *fo_path;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500213
214 /* sanity check */
215 if (size == 0)
216 return -EINVAL;
217
218 if (buf[size-1] != '\n')
219 return -EINVAL;
220
221 fo_path = buf;
222 if (qword_get(&buf, fo_path, size) < 0)
223 return -EINVAL;
224
Chuck Lever41160922009-08-09 15:09:40 -0400225 if (rpc_pton(fo_path, size, sap, salen) == 0)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500226 return -EINVAL;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500227
Chuck Lever41160922009-08-09 15:09:40 -0400228 return nlmsvc_unlock_all_by_ip(sap);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500229}
230
Chuck Lever262a0982008-12-12 16:57:35 -0500231/**
232 * write_unlock_fs - Release all locks on a local file system
233 *
234 * Experimental.
235 *
236 * Input:
237 * buf: '\n'-terminated C string containing the
238 * absolute pathname of a local file system
239 * size: length of C string in @buf
240 * Output:
241 * On success: returns zero if all specified locks were released;
242 * returns one if one or more locks were not released
243 * On error: return code is negative errno value
244 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500245static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
Wendy Cheng17efa372008-01-17 11:10:12 -0500246{
Al Viroa63bb992008-08-02 01:03:36 -0400247 struct path path;
Wendy Cheng17efa372008-01-17 11:10:12 -0500248 char *fo_path;
249 int error;
250
251 /* sanity check */
252 if (size == 0)
253 return -EINVAL;
254
255 if (buf[size-1] != '\n')
256 return -EINVAL;
257
258 fo_path = buf;
259 if (qword_get(&buf, fo_path, size) < 0)
260 return -EINVAL;
261
Al Viroa63bb992008-08-02 01:03:36 -0400262 error = kern_path(fo_path, 0, &path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500263 if (error)
264 return error;
265
Chuck Lever262a0982008-12-12 16:57:35 -0500266 /*
267 * XXX: Needs better sanity checking. Otherwise we could end up
268 * releasing locks on the wrong file system.
269 *
270 * For example:
271 * 1. Does the path refer to a directory?
272 * 2. Is that directory a mount point, or
273 * 3. Is that directory the root of an exported file system?
274 */
Al Viroa63bb992008-08-02 01:03:36 -0400275 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
Wendy Cheng17efa372008-01-17 11:10:12 -0500276
Al Viroa63bb992008-08-02 01:03:36 -0400277 path_put(&path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500278 return error;
279}
280
Chuck Lever262a0982008-12-12 16:57:35 -0500281/**
282 * write_filehandle - Get a variable-length NFS file handle by path
283 *
284 * On input, the buffer contains a '\n'-terminated C string comprised of
285 * three alphanumeric words separated by whitespace. The string may
286 * contain escape sequences.
287 *
288 * Input:
289 * buf:
290 * domain: client domain name
291 * path: export pathname
292 * maxsize: numeric maximum size of
293 * @buf
294 * size: length of C string in @buf
295 * Output:
296 * On success: passed-in buffer filled with '\n'-terminated C
297 * string containing a ASCII hex text version
298 * of the NFS file handle;
299 * return code is the size in bytes of the string
300 * On error: return code is negative errno value
301 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
303{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700305 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 char *mesg = buf;
307 int len;
308 struct auth_domain *dom;
309 struct knfsd_fh fh;
310
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500311 if (size == 0)
312 return -EINVAL;
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 if (buf[size-1] != '\n')
315 return -EINVAL;
316 buf[size-1] = 0;
317
318 dname = mesg;
319 len = qword_get(&mesg, dname, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500320 if (len <= 0)
321 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323 path = dname+len+1;
324 len = qword_get(&mesg, path, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500325 if (len <= 0)
326 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328 len = get_int(&mesg, &maxsize);
329 if (len)
330 return len;
331
332 if (maxsize < NFS_FHSIZE)
333 return -EINVAL;
334 if (maxsize > NFS3_FHSIZE)
335 maxsize = NFS3_FHSIZE;
336
337 if (qword_get(&mesg, mesg, size)>0)
338 return -EINVAL;
339
340 /* we have all the words, they are in buf.. */
341 dom = unix_domain_find(dname);
342 if (!dom)
343 return -ENOMEM;
344
345 len = exp_rootfh(dom, path, &fh, maxsize);
346 auth_domain_put(dom);
347 if (len)
348 return len;
349
Chuck Lever54224f02008-12-12 16:57:20 -0500350 mesg = buf;
351 len = SIMPLE_TRANSACTION_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
353 mesg[-1] = '\n';
354 return mesg - buf;
355}
356
Chuck Lever262a0982008-12-12 16:57:35 -0500357/**
358 * write_threads - Start NFSD, or report the current number of running threads
359 *
360 * Input:
361 * buf: ignored
362 * size: zero
363 * Output:
364 * On success: passed-in buffer filled with '\n'-terminated C
365 * string numeric value representing the number of
366 * running NFSD threads;
367 * return code is the size in bytes of the string
368 * On error: return code is zero
369 *
370 * OR
371 *
372 * Input:
373 * buf: C string containing an unsigned
374 * integer value representing the
375 * number of NFSD threads to start
376 * size: non-zero length of C string in @buf
377 * Output:
378 * On success: NFS service is started;
379 * passed-in buffer filled with '\n'-terminated C
380 * string numeric value representing the number of
381 * running NFSD threads;
382 * return code is the size in bytes of the string
383 * On error: return code is zero or a negative errno value
384 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385static ssize_t write_threads(struct file *file, char *buf, size_t size)
386{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 char *mesg = buf;
388 int rv;
389 if (size > 0) {
390 int newthreads;
391 rv = get_int(&mesg, &newthreads);
392 if (rv)
393 return rv;
Chuck Lever9e074852008-12-12 16:57:27 -0500394 if (newthreads < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return -EINVAL;
Chuck Lever9e074852008-12-12 16:57:27 -0500396 rv = nfsd_svc(NFS_PORT, newthreads);
NeilBrown82e12fe2009-06-16 11:03:07 +1000397 if (rv < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 return rv;
NeilBrown82e12fe2009-06-16 11:03:07 +1000399 } else
400 rv = nfsd_nrthreads();
Chuck Levere06b6402009-04-23 19:33:25 -0400401
NeilBrown82e12fe2009-06-16 11:03:07 +1000402 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
404
Chuck Lever262a0982008-12-12 16:57:35 -0500405/**
406 * write_pool_threads - Set or report the current number of threads per pool
407 *
408 * Input:
409 * buf: ignored
410 * size: zero
411 *
412 * OR
413 *
414 * Input:
415 * buf: C string containing whitespace-
416 * separated unsigned integer values
417 * representing the number of NFSD
418 * threads to start in each pool
419 * size: non-zero length of C string in @buf
420 * Output:
421 * On success: passed-in buffer filled with '\n'-terminated C
422 * string containing integer values representing the
423 * number of NFSD threads in each pool;
424 * return code is the size in bytes of the string
425 * On error: return code is zero or a negative errno value
426 */
Greg Bankseed29652006-10-02 02:18:02 -0700427static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
428{
429 /* if size > 0, look for an array of number of threads per node
430 * and apply them then write out number of threads per node as reply
431 */
432 char *mesg = buf;
433 int i;
434 int rv;
435 int len;
Neil Brownbedbdd82008-06-10 08:40:35 -0400436 int npools;
Greg Bankseed29652006-10-02 02:18:02 -0700437 int *nthreads;
438
Neil Brownbedbdd82008-06-10 08:40:35 -0400439 mutex_lock(&nfsd_mutex);
440 npools = nfsd_nrpools();
Greg Bankseed29652006-10-02 02:18:02 -0700441 if (npools == 0) {
442 /*
443 * NFS is shut down. The admin can start it by
444 * writing to the threads file but NOT the pool_threads
445 * file, sorry. Report zero threads.
446 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400447 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700448 strcpy(buf, "0\n");
449 return strlen(buf);
450 }
451
452 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
Neil Brownbedbdd82008-06-10 08:40:35 -0400453 rv = -ENOMEM;
Greg Bankseed29652006-10-02 02:18:02 -0700454 if (nthreads == NULL)
Neil Brownbedbdd82008-06-10 08:40:35 -0400455 goto out_free;
Greg Bankseed29652006-10-02 02:18:02 -0700456
457 if (size > 0) {
458 for (i = 0; i < npools; i++) {
459 rv = get_int(&mesg, &nthreads[i]);
460 if (rv == -ENOENT)
461 break; /* fewer numbers than pools */
462 if (rv)
463 goto out_free; /* syntax error */
464 rv = -EINVAL;
465 if (nthreads[i] < 0)
466 goto out_free;
467 }
468 rv = nfsd_set_nrthreads(i, nthreads);
469 if (rv)
470 goto out_free;
471 }
472
473 rv = nfsd_get_nrthreads(npools, nthreads);
474 if (rv)
475 goto out_free;
476
477 mesg = buf;
478 size = SIMPLE_TRANSACTION_LIMIT;
479 for (i = 0; i < npools && size > 0; i++) {
480 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
481 len = strlen(mesg);
482 size -= len;
483 mesg += len;
484 }
J. Bruce Fields413d63d2009-07-28 11:37:25 -0400485 rv = mesg - buf;
Greg Bankseed29652006-10-02 02:18:02 -0700486out_free:
487 kfree(nthreads);
Neil Brownbedbdd82008-06-10 08:40:35 -0400488 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700489 return rv;
490}
491
Jeff Layton3dd98a32008-06-10 08:40:36 -0400492static ssize_t __write_versions(struct file *file, char *buf, size_t size)
NeilBrown70c3b762005-11-07 01:00:25 -0800493{
NeilBrown70c3b762005-11-07 01:00:25 -0800494 char *mesg = buf;
Benny Halevy8daf2202009-04-03 08:28:59 +0300495 char *vers, *minorp, sign;
Chuck Lever261758b2009-04-23 19:33:18 -0400496 int len, num, remaining;
Benny Halevy8daf2202009-04-03 08:28:59 +0300497 unsigned minor;
NeilBrown70c3b762005-11-07 01:00:25 -0800498 ssize_t tlen = 0;
499 char *sep;
500
501 if (size>0) {
502 if (nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700503 /* Cannot change versions without updating
504 * nfsd_serv->sv_xdrsize, and reallocing
505 * rq_argp and rq_resp
506 */
NeilBrown70c3b762005-11-07 01:00:25 -0800507 return -EBUSY;
508 if (buf[size-1] != '\n')
509 return -EINVAL;
510 buf[size-1] = 0;
511
512 vers = mesg;
513 len = qword_get(&mesg, vers, size);
514 if (len <= 0) return -EINVAL;
515 do {
516 sign = *vers;
517 if (sign == '+' || sign == '-')
Benny Halevy8daf2202009-04-03 08:28:59 +0300518 num = simple_strtol((vers+1), &minorp, 0);
NeilBrown70c3b762005-11-07 01:00:25 -0800519 else
Benny Halevy8daf2202009-04-03 08:28:59 +0300520 num = simple_strtol(vers, &minorp, 0);
521 if (*minorp == '.') {
522 if (num < 4)
523 return -EINVAL;
524 minor = simple_strtoul(minorp+1, NULL, 0);
525 if (minor == 0)
526 return -EINVAL;
527 if (nfsd_minorversion(minor, sign == '-' ?
528 NFSD_CLEAR : NFSD_SET) < 0)
529 return -EINVAL;
530 goto next;
531 }
NeilBrown70c3b762005-11-07 01:00:25 -0800532 switch(num) {
533 case 2:
534 case 3:
535 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700536 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800537 break;
538 default:
539 return -EINVAL;
540 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300541 next:
NeilBrown70c3b762005-11-07 01:00:25 -0800542 vers += len + 1;
NeilBrown70c3b762005-11-07 01:00:25 -0800543 } while ((len = qword_get(&mesg, vers, size)) > 0);
544 /* If all get turned off, turn them back on, as
545 * having no versions is BAD
546 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700547 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800548 }
Chuck Lever261758b2009-04-23 19:33:18 -0400549
NeilBrown70c3b762005-11-07 01:00:25 -0800550 /* Now write current state into reply buffer */
551 len = 0;
552 sep = "";
Chuck Lever261758b2009-04-23 19:33:18 -0400553 remaining = SIMPLE_TRANSACTION_LIMIT;
NeilBrown70c3b762005-11-07 01:00:25 -0800554 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700555 if (nfsd_vers(num, NFSD_AVAIL)) {
Chuck Lever261758b2009-04-23 19:33:18 -0400556 len = snprintf(buf, remaining, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700557 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800558 num);
559 sep = " ";
Chuck Lever261758b2009-04-23 19:33:18 -0400560
561 if (len > remaining)
562 break;
563 remaining -= len;
564 buf += len;
565 tlen += len;
NeilBrown70c3b762005-11-07 01:00:25 -0800566 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300567 if (nfsd_vers(4, NFSD_AVAIL))
Chuck Lever261758b2009-04-23 19:33:18 -0400568 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
569 minor++) {
570 len = snprintf(buf, remaining, " %c4.%u",
Benny Halevy8daf2202009-04-03 08:28:59 +0300571 (nfsd_vers(4, NFSD_TEST) &&
572 nfsd_minorversion(minor, NFSD_TEST)) ?
573 '+' : '-',
574 minor);
Chuck Lever261758b2009-04-23 19:33:18 -0400575
576 if (len > remaining)
577 break;
578 remaining -= len;
579 buf += len;
580 tlen += len;
581 }
582
583 len = snprintf(buf, remaining, "\n");
584 if (len > remaining)
585 return -EINVAL;
586 return tlen + len;
NeilBrown70c3b762005-11-07 01:00:25 -0800587}
588
Chuck Lever262a0982008-12-12 16:57:35 -0500589/**
590 * write_versions - Set or report the available NFS protocol versions
591 *
592 * Input:
593 * buf: ignored
594 * size: zero
595 * Output:
596 * On success: passed-in buffer filled with '\n'-terminated C
597 * string containing positive or negative integer
598 * values representing the current status of each
599 * protocol version;
600 * return code is the size in bytes of the string
601 * On error: return code is zero or a negative errno value
602 *
603 * OR
604 *
605 * Input:
606 * buf: C string containing whitespace-
607 * separated positive or negative
608 * integer values representing NFS
609 * protocol versions to enable ("+n")
610 * or disable ("-n")
611 * size: non-zero length of C string in @buf
612 * Output:
613 * On success: status of zero or more protocol versions has
614 * been updated; passed-in buffer filled with
615 * '\n'-terminated C string containing positive
616 * or negative integer values representing the
617 * current status of each protocol version;
618 * return code is the size in bytes of the string
619 * On error: return code is zero or a negative errno value
620 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400621static ssize_t write_versions(struct file *file, char *buf, size_t size)
622{
623 ssize_t rv;
624
625 mutex_lock(&nfsd_mutex);
626 rv = __write_versions(file, buf, size);
627 mutex_unlock(&nfsd_mutex);
628 return rv;
629}
630
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400631/*
Chuck Lever0a5372d2009-04-23 19:32:10 -0400632 * Zero-length write. Return a list of NFSD's current listener
633 * transports.
634 */
635static ssize_t __write_ports_names(char *buf)
636{
637 if (nfsd_serv == NULL)
638 return 0;
Chuck Lever335c54b2009-04-23 19:32:25 -0400639 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Lever0a5372d2009-04-23 19:32:10 -0400640}
641
642/*
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400643 * A single 'fd' number was written, in which case it must be for
644 * a socket of a supported family/protocol, and we use it as an
645 * nfsd listener.
646 */
647static ssize_t __write_ports_addfd(char *buf)
648{
649 char *mesg = buf;
650 int fd, err;
651
652 err = get_int(&mesg, &fd);
653 if (err != 0 || fd < 0)
654 return -EINVAL;
655
656 err = nfsd_create_serv();
657 if (err != 0)
658 return err;
659
Chuck Leverbfba9ab2009-04-23 19:32:33 -0400660 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400661 if (err < 0) {
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400662 svc_destroy(nfsd_serv);
663 return err;
664 }
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400665
Chuck Leverea068ba2009-04-23 19:32:18 -0400666 /* Decrease the count, but don't shut down the service */
667 nfsd_serv->sv_nrthreads--;
668 return err;
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400669}
670
671/*
Chuck Lever82d56592009-04-23 19:31:48 -0400672 * A '-' followed by the 'name' of a socket means we close the socket.
673 */
674static ssize_t __write_ports_delfd(char *buf)
675{
676 char *toclose;
677 int len = 0;
678
679 toclose = kstrdup(buf + 1, GFP_KERNEL);
680 if (toclose == NULL)
681 return -ENOMEM;
682
683 if (nfsd_serv != NULL)
Chuck Lever8435d342009-04-23 19:32:40 -0400684 len = svc_sock_names(nfsd_serv, buf,
685 SIMPLE_TRANSACTION_LIMIT, toclose);
Chuck Lever82d56592009-04-23 19:31:48 -0400686 kfree(toclose);
687 return len;
688}
689
690/*
Chuck Lever4eb68c22009-04-23 19:31:40 -0400691 * A transport listener is added by writing it's transport name and
692 * a port number.
693 */
694static ssize_t __write_ports_addxprt(char *buf)
695{
696 char transport[16];
Chuck Lever37498292010-01-26 14:04:22 -0500697 struct svc_xprt *xprt;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400698 int port, err;
699
700 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
701 return -EINVAL;
702
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700703 if (port < 1 || port > USHRT_MAX)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400704 return -EINVAL;
705
706 err = nfsd_create_serv();
707 if (err != 0)
708 return err;
709
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +0400710 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever4eb68c22009-04-23 19:31:40 -0400711 PF_INET, port, SVC_SOCK_ANONYMOUS);
Chuck Lever68717902010-01-26 14:04:13 -0500712 if (err < 0)
Chuck Lever37498292010-01-26 14:04:22 -0500713 goto out_err;
714
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +0400715 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever37498292010-01-26 14:04:22 -0500716 PF_INET6, port, SVC_SOCK_ANONYMOUS);
717 if (err < 0 && err != -EAFNOSUPPORT)
718 goto out_close;
Jeff Layton0cd14a02010-07-19 16:50:06 -0400719
720 /* Decrease the count, but don't shut down the service */
721 nfsd_serv->sv_nrthreads--;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400722 return 0;
Chuck Lever37498292010-01-26 14:04:22 -0500723out_close:
724 xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
725 if (xprt != NULL) {
726 svc_close_xprt(xprt);
727 svc_xprt_put(xprt);
728 }
729out_err:
Jeff Layton0cd14a02010-07-19 16:50:06 -0400730 svc_destroy(nfsd_serv);
Chuck Lever37498292010-01-26 14:04:22 -0500731 return err;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400732}
733
734/*
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400735 * A transport listener is removed by writing a "-", it's transport
736 * name, and it's port number.
737 */
738static ssize_t __write_ports_delxprt(char *buf)
739{
740 struct svc_xprt *xprt;
741 char transport[16];
742 int port;
743
744 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
745 return -EINVAL;
746
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700747 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400748 return -EINVAL;
749
750 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
751 if (xprt == NULL)
752 return -ENOTCONN;
753
754 svc_close_xprt(xprt);
755 svc_xprt_put(xprt);
756 return 0;
757}
758
Neil Brownbedbdd82008-06-10 08:40:35 -0400759static ssize_t __write_ports(struct file *file, char *buf, size_t size)
NeilBrown80212d52006-10-02 02:17:47 -0700760{
Chuck Lever0a5372d2009-04-23 19:32:10 -0400761 if (size == 0)
762 return __write_ports_names(buf);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400763
764 if (isdigit(buf[0]))
765 return __write_ports_addfd(buf);
Chuck Lever82d56592009-04-23 19:31:48 -0400766
767 if (buf[0] == '-' && isdigit(buf[1]))
768 return __write_ports_delfd(buf);
Chuck Lever4eb68c22009-04-23 19:31:40 -0400769
770 if (isalpha(buf[0]))
771 return __write_ports_addxprt(buf);
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400772
773 if (buf[0] == '-' && isalpha(buf[1]))
774 return __write_ports_delxprt(buf);
775
NeilBrownb41b66d2006-10-02 02:17:48 -0700776 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -0700777}
778
Chuck Lever262a0982008-12-12 16:57:35 -0500779/**
780 * write_ports - Pass a socket file descriptor or transport name to listen on
781 *
782 * Input:
783 * buf: ignored
784 * size: zero
785 * Output:
786 * On success: passed-in buffer filled with a '\n'-terminated C
787 * string containing a whitespace-separated list of
788 * named NFSD listeners;
789 * return code is the size in bytes of the string
790 * On error: return code is zero or a negative errno value
791 *
792 * OR
793 *
794 * Input:
795 * buf: C string containing an unsigned
796 * integer value representing a bound
797 * but unconnected socket that is to be
Chuck Leverc71206a2009-04-23 19:32:03 -0400798 * used as an NFSD listener; listen(3)
799 * must be called for a SOCK_STREAM
800 * socket, otherwise it is ignored
Chuck Lever262a0982008-12-12 16:57:35 -0500801 * size: non-zero length of C string in @buf
802 * Output:
803 * On success: NFS service is started;
804 * passed-in buffer filled with a '\n'-terminated C
805 * string containing a unique alphanumeric name of
806 * the listener;
807 * return code is the size in bytes of the string
808 * On error: return code is a negative errno value
809 *
810 * OR
811 *
812 * Input:
813 * buf: C string containing a "-" followed
814 * by an integer value representing a
815 * previously passed in socket file
816 * descriptor
817 * size: non-zero length of C string in @buf
818 * Output:
819 * On success: NFS service no longer listens on that socket;
820 * passed-in buffer filled with a '\n'-terminated C
821 * string containing a unique name of the listener;
822 * return code is the size in bytes of the string
823 * On error: return code is a negative errno value
824 *
825 * OR
826 *
827 * Input:
828 * buf: C string containing a transport
829 * name and an unsigned integer value
830 * representing the port to listen on,
831 * separated by whitespace
832 * size: non-zero length of C string in @buf
833 * Output:
834 * On success: returns zero; NFS service is started
835 * On error: return code is a negative errno value
836 *
837 * OR
838 *
839 * Input:
840 * buf: C string containing a "-" followed
841 * by a transport name and an unsigned
842 * integer value representing the port
843 * to listen on, separated by whitespace
844 * size: non-zero length of C string in @buf
845 * Output:
846 * On success: returns zero; NFS service no longer listens
847 * on that transport
848 * On error: return code is a negative errno value
849 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400850static ssize_t write_ports(struct file *file, char *buf, size_t size)
851{
852 ssize_t rv;
Jeff Layton3dd98a32008-06-10 08:40:36 -0400853
Neil Brownbedbdd82008-06-10 08:40:35 -0400854 mutex_lock(&nfsd_mutex);
855 rv = __write_ports(file, buf, size);
856 mutex_unlock(&nfsd_mutex);
857 return rv;
858}
859
860
NeilBrown596bbe52006-10-04 02:15:48 -0700861int nfsd_max_blksize;
862
Chuck Lever262a0982008-12-12 16:57:35 -0500863/**
864 * write_maxblksize - Set or report the current NFS blksize
865 *
866 * Input:
867 * buf: ignored
868 * size: zero
869 *
870 * OR
871 *
872 * Input:
873 * buf: C string containing an unsigned
874 * integer value representing the new
875 * NFS blksize
876 * size: non-zero length of C string in @buf
877 * Output:
878 * On success: passed-in buffer filled with '\n'-terminated C string
879 * containing numeric value of the current NFS blksize
880 * setting;
881 * return code is the size in bytes of the string
882 * On error: return code is zero or a negative errno value
883 */
NeilBrown596bbe52006-10-04 02:15:48 -0700884static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
885{
886 char *mesg = buf;
887 if (size > 0) {
888 int bsize;
889 int rv = get_int(&mesg, &bsize);
890 if (rv)
891 return rv;
892 /* force bsize into allowed range and
893 * required alignment.
894 */
895 if (bsize < 1024)
896 bsize = 1024;
897 if (bsize > NFSSVC_MAXBLKSIZE)
898 bsize = NFSSVC_MAXBLKSIZE;
899 bsize &= ~(1024-1);
Neil Brownbedbdd82008-06-10 08:40:35 -0400900 mutex_lock(&nfsd_mutex);
J. Bruce Fields7fa53cc2010-08-06 18:00:33 -0400901 if (nfsd_serv) {
Neil Brownbedbdd82008-06-10 08:40:35 -0400902 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700903 return -EBUSY;
904 }
905 nfsd_max_blksize = bsize;
Neil Brownbedbdd82008-06-10 08:40:35 -0400906 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700907 }
Chuck Levere06b6402009-04-23 19:33:25 -0400908
909 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
910 nfsd_max_blksize);
NeilBrown596bbe52006-10-04 02:15:48 -0700911}
912
NeilBrown70c3b762005-11-07 01:00:25 -0800913#ifdef CONFIG_NFSD_V4
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500914static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 char *mesg = buf;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500917 int rv, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
919 if (size > 0) {
Jeff Layton3dd98a32008-06-10 08:40:36 -0400920 if (nfsd_serv)
921 return -EBUSY;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500922 rv = get_int(&mesg, &i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 if (rv)
924 return rv;
J. Bruce Fieldse7b184f2010-03-02 11:18:40 -0500925 /*
926 * Some sanity checking. We don't have a reason for
927 * these particular numbers, but problems with the
928 * extremes are:
929 * - Too short: the briefest network outage may
930 * cause clients to lose all their locks. Also,
931 * the frequent polling may be wasteful.
932 * - Too long: do you really want reboot recovery
933 * to take more than an hour? Or to make other
934 * clients wait an hour before being able to
935 * revoke a dead client's locks?
936 */
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500937 if (i < 10 || i > 3600)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 return -EINVAL;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500939 *time = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 }
Chuck Levere06b6402009-04-23 19:33:25 -0400941
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500942 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
943}
944
945static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
946{
947 ssize_t rv;
948
949 mutex_lock(&nfsd_mutex);
950 rv = __nfsd4_write_time(file, buf, size, time);
951 mutex_unlock(&nfsd_mutex);
952 return rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953}
954
Chuck Lever262a0982008-12-12 16:57:35 -0500955/**
956 * write_leasetime - Set or report the current NFSv4 lease time
957 *
958 * Input:
959 * buf: ignored
960 * size: zero
961 *
962 * OR
963 *
964 * Input:
965 * buf: C string containing an unsigned
966 * integer value representing the new
967 * NFSv4 lease expiry time
968 * size: non-zero length of C string in @buf
969 * Output:
970 * On success: passed-in buffer filled with '\n'-terminated C
971 * string containing unsigned integer value of the
972 * current lease expiry time;
973 * return code is the size in bytes of the string
974 * On error: return code is zero or a negative errno value
975 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400976static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
977{
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500978 return nfsd4_write_time(file, buf, size, &nfsd4_lease);
Jeff Layton3dd98a32008-06-10 08:40:36 -0400979}
980
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -0500981/**
982 * write_gracetime - Set or report current NFSv4 grace period time
983 *
984 * As above, but sets the time of the NFSv4 grace period.
985 *
986 * Note this should never be set to less than the *previous*
987 * lease-period time, but we don't try to enforce this. (In the common
988 * case (a new boot), we don't know what the previous lease time was
989 * anyway.)
990 */
991static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
992{
993 return nfsd4_write_time(file, buf, size, &nfsd4_grace);
994}
995
Jeff Layton3dd98a32008-06-10 08:40:36 -0400996extern char *nfs4_recoverydir(void);
997
998static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
NeilBrown0964a3d2005-06-23 22:04:32 -0700999{
1000 char *mesg = buf;
1001 char *recdir;
1002 int len, status;
1003
Jeff Layton3dd98a32008-06-10 08:40:36 -04001004 if (size > 0) {
1005 if (nfsd_serv)
1006 return -EBUSY;
1007 if (size > PATH_MAX || buf[size-1] != '\n')
1008 return -EINVAL;
1009 buf[size-1] = 0;
NeilBrown0964a3d2005-06-23 22:04:32 -07001010
Jeff Layton3dd98a32008-06-10 08:40:36 -04001011 recdir = mesg;
1012 len = qword_get(&mesg, recdir, size);
1013 if (len <= 0)
1014 return -EINVAL;
NeilBrown0964a3d2005-06-23 22:04:32 -07001015
Jeff Layton3dd98a32008-06-10 08:40:36 -04001016 status = nfs4_reset_recoverydir(recdir);
Andi Kleen69049962010-07-20 15:24:27 -07001017 if (status)
1018 return status;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001019 }
Chuck Lever3d72ab82009-04-23 19:33:10 -04001020
1021 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1022 nfs4_recoverydir());
NeilBrown0964a3d2005-06-23 22:04:32 -07001023}
Jeff Layton3dd98a32008-06-10 08:40:36 -04001024
Chuck Lever262a0982008-12-12 16:57:35 -05001025/**
1026 * write_recoverydir - Set or report the pathname of the recovery directory
1027 *
1028 * Input:
1029 * buf: ignored
1030 * size: zero
1031 *
1032 * OR
1033 *
1034 * Input:
1035 * buf: C string containing the pathname
1036 * of the directory on a local file
1037 * system containing permanent NFSv4
1038 * recovery data
1039 * size: non-zero length of C string in @buf
1040 * Output:
1041 * On success: passed-in buffer filled with '\n'-terminated C string
1042 * containing the current recovery pathname setting;
1043 * return code is the size in bytes of the string
1044 * On error: return code is zero or a negative errno value
1045 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001046static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1047{
1048 ssize_t rv;
1049
1050 mutex_lock(&nfsd_mutex);
1051 rv = __write_recoverydir(file, buf, size);
1052 mutex_unlock(&nfsd_mutex);
1053 return rv;
1054}
1055
NeilBrown70c3b762005-11-07 01:00:25 -08001056#endif
NeilBrown0964a3d2005-06-23 22:04:32 -07001057
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058/*----------------------------------------------------------------------------*/
1059/*
1060 * populating the filesystem.
1061 */
1062
1063static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1064{
1065 static struct tree_descr nfsd_files[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
J. Bruce Fieldse8e87532009-12-14 12:53:32 -05001067 [NFSD_Export_features] = {"export_features",
1068 &export_features_operations, S_IRUGO},
Wendy Cheng4373ea82008-01-17 11:10:12 -05001069 [NFSD_FO_UnlockIP] = {"unlock_ip",
1070 &transaction_ops, S_IWUSR|S_IRUSR},
Wendy Cheng17efa372008-01-17 11:10:12 -05001071 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1072 &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1074 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -07001075 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Banks03cf6c92009-01-13 21:26:36 +11001076 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
NeilBrown70c3b762005-11-07 01:00:25 -08001077 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -07001078 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -07001079 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001080#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -05001081 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001082#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083#ifdef CONFIG_NFSD_V4
1084 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -05001085 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -07001086 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087#endif
1088 /* last one */ {""}
1089 };
1090 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1091}
1092
Al Virofc14f2f2010-07-25 01:48:30 +04001093static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1094 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095{
Al Virofc14f2f2010-07-25 01:48:30 +04001096 return mount_single(fs_type, flags, data, nfsd_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097}
1098
1099static struct file_system_type nfsd_fs_type = {
1100 .owner = THIS_MODULE,
1101 .name = "nfsd",
Al Virofc14f2f2010-07-25 01:48:30 +04001102 .mount = nfsd_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 .kill_sb = kill_litter_super,
1104};
1105
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001106#ifdef CONFIG_PROC_FS
1107static int create_proc_exports_entry(void)
1108{
1109 struct proc_dir_entry *entry;
1110
1111 entry = proc_mkdir("fs/nfs", NULL);
1112 if (!entry)
1113 return -ENOMEM;
Denis V. Lunev9ef2db22008-04-29 01:02:04 -07001114 entry = proc_create("exports", 0, entry, &exports_operations);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001115 if (!entry)
1116 return -ENOMEM;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001117 return 0;
1118}
1119#else /* CONFIG_PROC_FS */
1120static int create_proc_exports_entry(void)
1121{
1122 return 0;
1123}
1124#endif
1125
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126static int __init init_nfsd(void)
1127{
1128 int retval;
1129 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1130
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001131 retval = nfs4_state_init(); /* nfs4 locking state */
1132 if (retval)
1133 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001135 retval = nfsd_reply_cache_init();
1136 if (retval)
1137 goto out_free_stat;
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001138 retval = nfsd_export_init();
1139 if (retval)
1140 goto out_free_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001142 retval = nfsd_idmap_init();
1143 if (retval)
1144 goto out_free_lockd;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001145 retval = create_proc_exports_entry();
1146 if (retval)
1147 goto out_free_idmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -05001149 if (retval)
1150 goto out_free_all;
1151 return 0;
1152out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001153 remove_proc_entry("fs/nfs/exports", NULL);
1154 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001155out_free_idmap:
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001156 nfsd_idmap_shutdown();
1157out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001158 nfsd_lockd_shutdown();
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001159 nfsd_export_shutdown();
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001160out_free_cache:
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001161 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001162out_free_stat:
1163 nfsd_stat_shutdown();
J. Bruce Fields26808d32007-11-09 13:44:06 -05001164 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 return retval;
1166}
1167
1168static void __exit exit_nfsd(void)
1169{
1170 nfsd_export_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001171 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 remove_proc_entry("fs/nfs/exports", NULL);
1173 remove_proc_entry("fs/nfs", NULL);
1174 nfsd_stat_shutdown();
1175 nfsd_lockd_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 nfsd_idmap_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001177 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 unregister_filesystem(&nfsd_fs_type);
1179}
1180
1181MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1182MODULE_LICENSE("GPL");
1183module_init(init_nfsd)
1184module_exit(exit_nfsd)