blob: dee6c1bb9ba838f06425c3d699b58f11a6ba122f [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>
Wendy Cheng4373ea82008-01-17 11:10:12 -050012#include <linux/lockd/lockd.h>
Chuck Lever41160922009-08-09 15:09:40 -040013#include <linux/sunrpc/clnt.h>
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050014#include <linux/sunrpc/gss_api.h>
J. Bruce Fieldsb084f592011-05-31 12:24:58 -040015#include <linux/sunrpc/gss_krb5_enctypes.h>
Jeff Layton813fd322012-03-21 09:52:08 -040016#include <linux/sunrpc/rpc_pipe_fs.h>
Paul Gortmaker143cb492011-07-01 14:23:34 -040017#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050019#include "idmap.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020020#include "nfsd.h"
21#include "cache.h"
Bryan Schumaker65178db2011-11-01 13:35:21 -040022#include "fault_inject.h"
Jeff Layton7ea34ac2012-03-21 09:52:05 -040023#include "netns.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025/*
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050026 * We have a single directory with several nodes in it.
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 */
28enum {
29 NFSD_Root = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 NFSD_List,
J. Bruce Fieldse8e87532009-12-14 12:53:32 -050031 NFSD_Export_features,
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 NFSD_Fh,
Wendy Cheng4373ea82008-01-17 11:10:12 -050033 NFSD_FO_UnlockIP,
Wendy Cheng17efa372008-01-17 11:10:12 -050034 NFSD_FO_UnlockFS,
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 NFSD_Threads,
Greg Bankseed29652006-10-02 02:18:02 -070036 NFSD_Pool_Threads,
Greg Banks03cf6c92009-01-13 21:26:36 +110037 NFSD_Pool_Stats,
NeilBrown70c3b762005-11-07 01:00:25 -080038 NFSD_Versions,
NeilBrown80212d52006-10-02 02:17:47 -070039 NFSD_Ports,
NeilBrown596bbe52006-10-04 02:15:48 -070040 NFSD_MaxBlkSize,
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050041 NFSD_SupportedEnctypes,
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,
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050048 NFSD_Gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070049 NFSD_RecoveryDir,
NeilBrown70c3b762005-11-07 01:00:25 -080050#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070051};
52
53/*
54 * write() for these nodes.
55 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070056static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
Chuck Leverb046ccd2008-12-12 16:57:13 -050057static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
58static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059static ssize_t write_threads(struct file *file, char *buf, size_t size);
Greg Bankseed29652006-10-02 02:18:02 -070060static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080061static ssize_t write_versions(struct file *file, char *buf, size_t size);
NeilBrown80212d52006-10-02 02:17:47 -070062static ssize_t write_ports(struct file *file, char *buf, size_t size);
NeilBrown596bbe52006-10-04 02:15:48 -070063static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080064#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050066static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
NeilBrown0964a3d2005-06-23 22:04:32 -070067static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080068#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70static ssize_t (*write_op[])(struct file *, char *, size_t) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 [NFSD_Fh] = write_filehandle,
Chuck Leverb046ccd2008-12-12 16:57:13 -050072 [NFSD_FO_UnlockIP] = write_unlock_ip,
73 [NFSD_FO_UnlockFS] = write_unlock_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 [NFSD_Threads] = write_threads,
Greg Bankseed29652006-10-02 02:18:02 -070075 [NFSD_Pool_Threads] = write_pool_threads,
NeilBrown70c3b762005-11-07 01:00:25 -080076 [NFSD_Versions] = write_versions,
NeilBrown80212d52006-10-02 02:17:47 -070077 [NFSD_Ports] = write_ports,
NeilBrown596bbe52006-10-04 02:15:48 -070078 [NFSD_MaxBlkSize] = write_maxblksize,
NeilBrown70c3b762005-11-07 01:00:25 -080079#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 [NFSD_Leasetime] = write_leasetime,
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050081 [NFSD_Gracetime] = write_gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070082 [NFSD_RecoveryDir] = write_recoverydir,
NeilBrown70c3b762005-11-07 01:00:25 -080083#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070084};
85
86static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
87{
Josef "Jeff" Sipek7eaa36e2006-12-08 02:36:41 -080088 ino_t ino = file->f_path.dentry->d_inode->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 char *data;
90 ssize_t rv;
91
Tobias Klausere8c96f82006-03-24 03:15:34 -080092 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 return -EINVAL;
94
95 data = simple_transaction_get(file, buf, size);
96 if (IS_ERR(data))
97 return PTR_ERR(data);
98
99 rv = write_op[ino](file, data, size);
NeilBrown8971a102007-02-14 00:33:11 -0800100 if (rv >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 simple_transaction_set(file, rv);
102 rv = size;
103 }
104 return rv;
105}
106
NeilBrown73900222005-11-07 01:00:24 -0800107static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
108{
109 if (! file->private_data) {
110 /* An attempt to read a transaction file without writing
111 * causes a 0-byte write so that the file can return
112 * state information
113 */
114 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
115 if (rv < 0)
116 return rv;
117 }
118 return simple_transaction_read(file, buf, size, pos);
119}
120
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800121static const struct file_operations transaction_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 .write = nfsctl_transaction_write,
NeilBrown73900222005-11-07 01:00:24 -0800123 .read = nfsctl_transaction_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 .release = simple_transaction_release,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200125 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126};
127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128static int exports_open(struct inode *inode, struct file *file)
129{
130 return seq_open(file, &nfs_exports_op);
131}
132
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800133static const struct file_operations exports_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 .open = exports_open,
135 .read = seq_read,
136 .llseek = seq_lseek,
137 .release = seq_release,
Denis V. Lunev9ef2db22008-04-29 01:02:04 -0700138 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139};
140
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500141static int export_features_show(struct seq_file *m, void *v)
142{
143 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
144 return 0;
145}
146
147static int export_features_open(struct inode *inode, struct file *file)
148{
149 return single_open(file, export_features_show, NULL);
150}
151
152static struct file_operations export_features_operations = {
153 .open = export_features_open,
154 .read = seq_read,
155 .llseek = seq_lseek,
156 .release = single_release,
157};
158
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400159#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500160static int supported_enctypes_show(struct seq_file *m, void *v)
161{
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400162 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500163 return 0;
164}
165
166static int supported_enctypes_open(struct inode *inode, struct file *file)
167{
168 return single_open(file, supported_enctypes_show, NULL);
169}
170
171static struct file_operations supported_enctypes_ops = {
172 .open = supported_enctypes_open,
173 .read = seq_read,
174 .llseek = seq_lseek,
175 .release = single_release,
176};
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400177#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500178
Greg Banks03cf6c92009-01-13 21:26:36 +1100179extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900180extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
Greg Banks03cf6c92009-01-13 21:26:36 +1100181
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700182static const struct file_operations pool_stats_operations = {
Greg Banks03cf6c92009-01-13 21:26:36 +1100183 .open = nfsd_pool_stats_open,
184 .read = seq_read,
185 .llseek = seq_lseek,
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900186 .release = nfsd_pool_stats_release,
Greg Banks03cf6c92009-01-13 21:26:36 +1100187 .owner = THIS_MODULE,
188};
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190/*----------------------------------------------------------------------------*/
191/*
192 * payload - write methods
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 */
194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Chuck Lever262a0982008-12-12 16:57:35 -0500196/**
197 * write_unlock_ip - Release all locks used by a client
198 *
199 * Experimental.
200 *
201 * Input:
202 * buf: '\n'-terminated C string containing a
Chuck Lever41160922009-08-09 15:09:40 -0400203 * presentation format IP address
Chuck Lever262a0982008-12-12 16:57:35 -0500204 * size: length of C string in @buf
205 * Output:
206 * On success: returns zero if all specified locks were released;
207 * returns one if one or more locks were not released
208 * On error: return code is negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500209 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500210static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500211{
Chuck Lever41160922009-08-09 15:09:40 -0400212 struct sockaddr_storage address;
213 struct sockaddr *sap = (struct sockaddr *)&address;
214 size_t salen = sizeof(address);
Chuck Lever367c8c72008-06-30 18:58:14 -0400215 char *fo_path;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500216
217 /* sanity check */
218 if (size == 0)
219 return -EINVAL;
220
221 if (buf[size-1] != '\n')
222 return -EINVAL;
223
224 fo_path = buf;
225 if (qword_get(&buf, fo_path, size) < 0)
226 return -EINVAL;
227
Stanislav Kinsbursky90100b12012-01-13 13:09:19 +0400228 if (rpc_pton(&init_net, fo_path, size, sap, salen) == 0)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500229 return -EINVAL;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500230
Chuck Lever41160922009-08-09 15:09:40 -0400231 return nlmsvc_unlock_all_by_ip(sap);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500232}
233
Chuck Lever262a0982008-12-12 16:57:35 -0500234/**
235 * write_unlock_fs - Release all locks on a local file system
236 *
237 * Experimental.
238 *
239 * Input:
240 * buf: '\n'-terminated C string containing the
241 * absolute pathname of a local file system
242 * size: length of C string in @buf
243 * Output:
244 * On success: returns zero if all specified locks were released;
245 * returns one if one or more locks were not released
246 * On error: return code is negative errno value
247 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500248static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
Wendy Cheng17efa372008-01-17 11:10:12 -0500249{
Al Viroa63bb992008-08-02 01:03:36 -0400250 struct path path;
Wendy Cheng17efa372008-01-17 11:10:12 -0500251 char *fo_path;
252 int error;
253
254 /* sanity check */
255 if (size == 0)
256 return -EINVAL;
257
258 if (buf[size-1] != '\n')
259 return -EINVAL;
260
261 fo_path = buf;
262 if (qword_get(&buf, fo_path, size) < 0)
263 return -EINVAL;
264
Al Viroa63bb992008-08-02 01:03:36 -0400265 error = kern_path(fo_path, 0, &path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500266 if (error)
267 return error;
268
Chuck Lever262a0982008-12-12 16:57:35 -0500269 /*
270 * XXX: Needs better sanity checking. Otherwise we could end up
271 * releasing locks on the wrong file system.
272 *
273 * For example:
274 * 1. Does the path refer to a directory?
275 * 2. Is that directory a mount point, or
276 * 3. Is that directory the root of an exported file system?
277 */
Al Virod8c95842011-12-07 18:16:57 -0500278 error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);
Wendy Cheng17efa372008-01-17 11:10:12 -0500279
Al Viroa63bb992008-08-02 01:03:36 -0400280 path_put(&path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500281 return error;
282}
283
Chuck Lever262a0982008-12-12 16:57:35 -0500284/**
285 * write_filehandle - Get a variable-length NFS file handle by path
286 *
287 * On input, the buffer contains a '\n'-terminated C string comprised of
288 * three alphanumeric words separated by whitespace. The string may
289 * contain escape sequences.
290 *
291 * Input:
292 * buf:
293 * domain: client domain name
294 * path: export pathname
295 * maxsize: numeric maximum size of
296 * @buf
297 * size: length of C string in @buf
298 * Output:
299 * On success: passed-in buffer filled with '\n'-terminated C
300 * string containing a ASCII hex text version
301 * of the NFS file handle;
302 * return code is the size in bytes of the string
303 * On error: return code is negative errno value
304 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
306{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700308 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 char *mesg = buf;
310 int len;
311 struct auth_domain *dom;
312 struct knfsd_fh fh;
313
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500314 if (size == 0)
315 return -EINVAL;
316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 if (buf[size-1] != '\n')
318 return -EINVAL;
319 buf[size-1] = 0;
320
321 dname = mesg;
322 len = qword_get(&mesg, dname, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500323 if (len <= 0)
324 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326 path = dname+len+1;
327 len = qword_get(&mesg, path, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500328 if (len <= 0)
329 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
331 len = get_int(&mesg, &maxsize);
332 if (len)
333 return len;
334
335 if (maxsize < NFS_FHSIZE)
336 return -EINVAL;
337 if (maxsize > NFS3_FHSIZE)
338 maxsize = NFS3_FHSIZE;
339
340 if (qword_get(&mesg, mesg, size)>0)
341 return -EINVAL;
342
343 /* we have all the words, they are in buf.. */
344 dom = unix_domain_find(dname);
345 if (!dom)
346 return -ENOMEM;
347
348 len = exp_rootfh(dom, path, &fh, maxsize);
349 auth_domain_put(dom);
350 if (len)
351 return len;
352
Chuck Lever54224f02008-12-12 16:57:20 -0500353 mesg = buf;
354 len = SIMPLE_TRANSACTION_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
356 mesg[-1] = '\n';
357 return mesg - buf;
358}
359
Chuck Lever262a0982008-12-12 16:57:35 -0500360/**
361 * write_threads - Start NFSD, or report the current number of running threads
362 *
363 * Input:
364 * buf: ignored
365 * size: zero
366 * Output:
367 * On success: passed-in buffer filled with '\n'-terminated C
368 * string numeric value representing the number of
369 * running NFSD threads;
370 * return code is the size in bytes of the string
371 * On error: return code is zero
372 *
373 * OR
374 *
375 * Input:
376 * buf: C string containing an unsigned
377 * integer value representing the
378 * number of NFSD threads to start
379 * size: non-zero length of C string in @buf
380 * Output:
381 * On success: NFS service is started;
382 * passed-in buffer filled with '\n'-terminated C
383 * string numeric value representing the number of
384 * running NFSD threads;
385 * return code is the size in bytes of the string
386 * On error: return code is zero or a negative errno value
387 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388static ssize_t write_threads(struct file *file, char *buf, size_t size)
389{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 char *mesg = buf;
391 int rv;
392 if (size > 0) {
393 int newthreads;
394 rv = get_int(&mesg, &newthreads);
395 if (rv)
396 return rv;
Chuck Lever9e074852008-12-12 16:57:27 -0500397 if (newthreads < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 return -EINVAL;
Chuck Lever9e074852008-12-12 16:57:27 -0500399 rv = nfsd_svc(NFS_PORT, newthreads);
NeilBrown82e12fe2009-06-16 11:03:07 +1000400 if (rv < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return rv;
NeilBrown82e12fe2009-06-16 11:03:07 +1000402 } else
403 rv = nfsd_nrthreads();
Chuck Levere06b6402009-04-23 19:33:25 -0400404
NeilBrown82e12fe2009-06-16 11:03:07 +1000405 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406}
407
Chuck Lever262a0982008-12-12 16:57:35 -0500408/**
409 * write_pool_threads - Set or report the current number of threads per pool
410 *
411 * Input:
412 * buf: ignored
413 * size: zero
414 *
415 * OR
416 *
417 * Input:
418 * buf: C string containing whitespace-
419 * separated unsigned integer values
420 * representing the number of NFSD
421 * threads to start in each pool
422 * size: non-zero length of C string in @buf
423 * Output:
424 * On success: passed-in buffer filled with '\n'-terminated C
425 * string containing integer values representing the
426 * number of NFSD threads in each pool;
427 * return code is the size in bytes of the string
428 * On error: return code is zero or a negative errno value
429 */
Greg Bankseed29652006-10-02 02:18:02 -0700430static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
431{
432 /* if size > 0, look for an array of number of threads per node
433 * and apply them then write out number of threads per node as reply
434 */
435 char *mesg = buf;
436 int i;
437 int rv;
438 int len;
Neil Brownbedbdd82008-06-10 08:40:35 -0400439 int npools;
Greg Bankseed29652006-10-02 02:18:02 -0700440 int *nthreads;
441
Neil Brownbedbdd82008-06-10 08:40:35 -0400442 mutex_lock(&nfsd_mutex);
443 npools = nfsd_nrpools();
Greg Bankseed29652006-10-02 02:18:02 -0700444 if (npools == 0) {
445 /*
446 * NFS is shut down. The admin can start it by
447 * writing to the threads file but NOT the pool_threads
448 * file, sorry. Report zero threads.
449 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400450 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700451 strcpy(buf, "0\n");
452 return strlen(buf);
453 }
454
455 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
Neil Brownbedbdd82008-06-10 08:40:35 -0400456 rv = -ENOMEM;
Greg Bankseed29652006-10-02 02:18:02 -0700457 if (nthreads == NULL)
Neil Brownbedbdd82008-06-10 08:40:35 -0400458 goto out_free;
Greg Bankseed29652006-10-02 02:18:02 -0700459
460 if (size > 0) {
461 for (i = 0; i < npools; i++) {
462 rv = get_int(&mesg, &nthreads[i]);
463 if (rv == -ENOENT)
464 break; /* fewer numbers than pools */
465 if (rv)
466 goto out_free; /* syntax error */
467 rv = -EINVAL;
468 if (nthreads[i] < 0)
469 goto out_free;
470 }
471 rv = nfsd_set_nrthreads(i, nthreads);
472 if (rv)
473 goto out_free;
474 }
475
476 rv = nfsd_get_nrthreads(npools, nthreads);
477 if (rv)
478 goto out_free;
479
480 mesg = buf;
481 size = SIMPLE_TRANSACTION_LIMIT;
482 for (i = 0; i < npools && size > 0; i++) {
483 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
484 len = strlen(mesg);
485 size -= len;
486 mesg += len;
487 }
J. Bruce Fields413d63d7102009-07-28 11:37:25 -0400488 rv = mesg - buf;
Greg Bankseed29652006-10-02 02:18:02 -0700489out_free:
490 kfree(nthreads);
Neil Brownbedbdd82008-06-10 08:40:35 -0400491 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700492 return rv;
493}
494
Jeff Layton3dd98a32008-06-10 08:40:36 -0400495static ssize_t __write_versions(struct file *file, char *buf, size_t size)
NeilBrown70c3b762005-11-07 01:00:25 -0800496{
NeilBrown70c3b762005-11-07 01:00:25 -0800497 char *mesg = buf;
Benny Halevy8daf2202009-04-03 08:28:59 +0300498 char *vers, *minorp, sign;
Chuck Lever261758b2009-04-23 19:33:18 -0400499 int len, num, remaining;
Benny Halevy8daf2202009-04-03 08:28:59 +0300500 unsigned minor;
NeilBrown70c3b762005-11-07 01:00:25 -0800501 ssize_t tlen = 0;
502 char *sep;
503
504 if (size>0) {
505 if (nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700506 /* Cannot change versions without updating
507 * nfsd_serv->sv_xdrsize, and reallocing
508 * rq_argp and rq_resp
509 */
NeilBrown70c3b762005-11-07 01:00:25 -0800510 return -EBUSY;
511 if (buf[size-1] != '\n')
512 return -EINVAL;
513 buf[size-1] = 0;
514
515 vers = mesg;
516 len = qword_get(&mesg, vers, size);
517 if (len <= 0) return -EINVAL;
518 do {
519 sign = *vers;
520 if (sign == '+' || sign == '-')
Benny Halevy8daf2202009-04-03 08:28:59 +0300521 num = simple_strtol((vers+1), &minorp, 0);
NeilBrown70c3b762005-11-07 01:00:25 -0800522 else
Benny Halevy8daf2202009-04-03 08:28:59 +0300523 num = simple_strtol(vers, &minorp, 0);
524 if (*minorp == '.') {
525 if (num < 4)
526 return -EINVAL;
527 minor = simple_strtoul(minorp+1, NULL, 0);
528 if (minor == 0)
529 return -EINVAL;
530 if (nfsd_minorversion(minor, sign == '-' ?
531 NFSD_CLEAR : NFSD_SET) < 0)
532 return -EINVAL;
533 goto next;
534 }
NeilBrown70c3b762005-11-07 01:00:25 -0800535 switch(num) {
536 case 2:
537 case 3:
538 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700539 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800540 break;
541 default:
542 return -EINVAL;
543 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300544 next:
NeilBrown70c3b762005-11-07 01:00:25 -0800545 vers += len + 1;
NeilBrown70c3b762005-11-07 01:00:25 -0800546 } while ((len = qword_get(&mesg, vers, size)) > 0);
547 /* If all get turned off, turn them back on, as
548 * having no versions is BAD
549 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700550 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800551 }
Chuck Lever261758b2009-04-23 19:33:18 -0400552
NeilBrown70c3b762005-11-07 01:00:25 -0800553 /* Now write current state into reply buffer */
554 len = 0;
555 sep = "";
Chuck Lever261758b2009-04-23 19:33:18 -0400556 remaining = SIMPLE_TRANSACTION_LIMIT;
NeilBrown70c3b762005-11-07 01:00:25 -0800557 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700558 if (nfsd_vers(num, NFSD_AVAIL)) {
Chuck Lever261758b2009-04-23 19:33:18 -0400559 len = snprintf(buf, remaining, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700560 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800561 num);
562 sep = " ";
Chuck Lever261758b2009-04-23 19:33:18 -0400563
564 if (len > remaining)
565 break;
566 remaining -= len;
567 buf += len;
568 tlen += len;
NeilBrown70c3b762005-11-07 01:00:25 -0800569 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300570 if (nfsd_vers(4, NFSD_AVAIL))
Chuck Lever261758b2009-04-23 19:33:18 -0400571 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
572 minor++) {
573 len = snprintf(buf, remaining, " %c4.%u",
Benny Halevy8daf2202009-04-03 08:28:59 +0300574 (nfsd_vers(4, NFSD_TEST) &&
575 nfsd_minorversion(minor, NFSD_TEST)) ?
576 '+' : '-',
577 minor);
Chuck Lever261758b2009-04-23 19:33:18 -0400578
579 if (len > remaining)
580 break;
581 remaining -= len;
582 buf += len;
583 tlen += len;
584 }
585
586 len = snprintf(buf, remaining, "\n");
587 if (len > remaining)
588 return -EINVAL;
589 return tlen + len;
NeilBrown70c3b762005-11-07 01:00:25 -0800590}
591
Chuck Lever262a0982008-12-12 16:57:35 -0500592/**
593 * write_versions - Set or report the available NFS protocol versions
594 *
595 * Input:
596 * buf: ignored
597 * size: zero
598 * Output:
599 * On success: passed-in buffer filled with '\n'-terminated C
600 * string containing positive or negative integer
601 * values representing the current status of each
602 * protocol version;
603 * return code is the size in bytes of the string
604 * On error: return code is zero or a negative errno value
605 *
606 * OR
607 *
608 * Input:
609 * buf: C string containing whitespace-
610 * separated positive or negative
611 * integer values representing NFS
612 * protocol versions to enable ("+n")
613 * or disable ("-n")
614 * size: non-zero length of C string in @buf
615 * Output:
616 * On success: status of zero or more protocol versions has
617 * been updated; passed-in buffer filled with
618 * '\n'-terminated C string containing positive
619 * or negative integer values representing the
620 * current status of each protocol version;
621 * return code is the size in bytes of the string
622 * On error: return code is zero or a negative errno value
623 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400624static ssize_t write_versions(struct file *file, char *buf, size_t size)
625{
626 ssize_t rv;
627
628 mutex_lock(&nfsd_mutex);
629 rv = __write_versions(file, buf, size);
630 mutex_unlock(&nfsd_mutex);
631 return rv;
632}
633
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400634/*
Chuck Lever0a5372d2009-04-23 19:32:10 -0400635 * Zero-length write. Return a list of NFSD's current listener
636 * transports.
637 */
638static ssize_t __write_ports_names(char *buf)
639{
640 if (nfsd_serv == NULL)
641 return 0;
Chuck Lever335c54b2009-04-23 19:32:25 -0400642 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Lever0a5372d2009-04-23 19:32:10 -0400643}
644
645/*
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400646 * A single 'fd' number was written, in which case it must be for
647 * a socket of a supported family/protocol, and we use it as an
648 * nfsd listener.
649 */
650static ssize_t __write_ports_addfd(char *buf)
651{
652 char *mesg = buf;
653 int fd, err;
654
655 err = get_int(&mesg, &fd);
656 if (err != 0 || fd < 0)
657 return -EINVAL;
658
659 err = nfsd_create_serv();
660 if (err != 0)
661 return err;
662
Chuck Leverbfba9ab2009-04-23 19:32:33 -0400663 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400664 if (err < 0) {
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400665 svc_destroy(nfsd_serv);
666 return err;
667 }
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400668
Chuck Leverea068ba2009-04-23 19:32:18 -0400669 /* Decrease the count, but don't shut down the service */
670 nfsd_serv->sv_nrthreads--;
671 return err;
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400672}
673
674/*
Chuck Lever82d56592009-04-23 19:31:48 -0400675 * A '-' followed by the 'name' of a socket means we close the socket.
676 */
677static ssize_t __write_ports_delfd(char *buf)
678{
679 char *toclose;
680 int len = 0;
681
682 toclose = kstrdup(buf + 1, GFP_KERNEL);
683 if (toclose == NULL)
684 return -ENOMEM;
685
686 if (nfsd_serv != NULL)
Chuck Lever8435d342009-04-23 19:32:40 -0400687 len = svc_sock_names(nfsd_serv, buf,
688 SIMPLE_TRANSACTION_LIMIT, toclose);
Chuck Lever82d56592009-04-23 19:31:48 -0400689 kfree(toclose);
690 return len;
691}
692
693/*
Chuck Lever4eb68c22009-04-23 19:31:40 -0400694 * A transport listener is added by writing it's transport name and
695 * a port number.
696 */
697static ssize_t __write_ports_addxprt(char *buf)
698{
699 char transport[16];
Chuck Lever37498292010-01-26 14:04:22 -0500700 struct svc_xprt *xprt;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400701 int port, err;
702
703 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
704 return -EINVAL;
705
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700706 if (port < 1 || port > USHRT_MAX)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400707 return -EINVAL;
708
709 err = nfsd_create_serv();
710 if (err != 0)
711 return err;
712
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +0400713 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever4eb68c22009-04-23 19:31:40 -0400714 PF_INET, port, SVC_SOCK_ANONYMOUS);
Chuck Lever68717902010-01-26 14:04:13 -0500715 if (err < 0)
Chuck Lever37498292010-01-26 14:04:22 -0500716 goto out_err;
717
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +0400718 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever37498292010-01-26 14:04:22 -0500719 PF_INET6, port, SVC_SOCK_ANONYMOUS);
720 if (err < 0 && err != -EAFNOSUPPORT)
721 goto out_close;
Jeff Layton0cd14a02010-07-19 16:50:06 -0400722
723 /* Decrease the count, but don't shut down the service */
724 nfsd_serv->sv_nrthreads--;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400725 return 0;
Chuck Lever37498292010-01-26 14:04:22 -0500726out_close:
Stanislav Kinsbursky4cb54ca2012-01-20 16:50:53 +0400727 xprt = svc_find_xprt(nfsd_serv, transport, &init_net, PF_INET, port);
Chuck Lever37498292010-01-26 14:04:22 -0500728 if (xprt != NULL) {
729 svc_close_xprt(xprt);
730 svc_xprt_put(xprt);
731 }
732out_err:
Jeff Layton0cd14a02010-07-19 16:50:06 -0400733 svc_destroy(nfsd_serv);
Chuck Lever37498292010-01-26 14:04:22 -0500734 return err;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400735}
736
737/*
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400738 * A transport listener is removed by writing a "-", it's transport
739 * name, and it's port number.
740 */
741static ssize_t __write_ports_delxprt(char *buf)
742{
743 struct svc_xprt *xprt;
744 char transport[16];
745 int port;
746
747 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
748 return -EINVAL;
749
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700750 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400751 return -EINVAL;
752
Stanislav Kinsbursky4cb54ca2012-01-20 16:50:53 +0400753 xprt = svc_find_xprt(nfsd_serv, transport, &init_net, AF_UNSPEC, port);
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400754 if (xprt == NULL)
755 return -ENOTCONN;
756
757 svc_close_xprt(xprt);
758 svc_xprt_put(xprt);
759 return 0;
760}
761
Neil Brownbedbdd82008-06-10 08:40:35 -0400762static ssize_t __write_ports(struct file *file, char *buf, size_t size)
NeilBrown80212d52006-10-02 02:17:47 -0700763{
Chuck Lever0a5372d2009-04-23 19:32:10 -0400764 if (size == 0)
765 return __write_ports_names(buf);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400766
767 if (isdigit(buf[0]))
768 return __write_ports_addfd(buf);
Chuck Lever82d56592009-04-23 19:31:48 -0400769
770 if (buf[0] == '-' && isdigit(buf[1]))
771 return __write_ports_delfd(buf);
Chuck Lever4eb68c22009-04-23 19:31:40 -0400772
773 if (isalpha(buf[0]))
774 return __write_ports_addxprt(buf);
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400775
776 if (buf[0] == '-' && isalpha(buf[1]))
777 return __write_ports_delxprt(buf);
778
NeilBrownb41b66d2006-10-02 02:17:48 -0700779 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -0700780}
781
Chuck Lever262a0982008-12-12 16:57:35 -0500782/**
783 * write_ports - Pass a socket file descriptor or transport name to listen on
784 *
785 * Input:
786 * buf: ignored
787 * size: zero
788 * Output:
789 * On success: passed-in buffer filled with a '\n'-terminated C
790 * string containing a whitespace-separated list of
791 * named NFSD listeners;
792 * return code is the size in bytes of the string
793 * On error: return code is zero or a negative errno value
794 *
795 * OR
796 *
797 * Input:
798 * buf: C string containing an unsigned
799 * integer value representing a bound
800 * but unconnected socket that is to be
Chuck Leverc71206a2009-04-23 19:32:03 -0400801 * used as an NFSD listener; listen(3)
802 * must be called for a SOCK_STREAM
803 * socket, otherwise it is ignored
Chuck Lever262a0982008-12-12 16:57:35 -0500804 * size: non-zero length of C string in @buf
805 * Output:
806 * On success: NFS service is started;
807 * passed-in buffer filled with a '\n'-terminated C
808 * string containing a unique alphanumeric name of
809 * the listener;
810 * return code is the size in bytes of the string
811 * On error: return code is a negative errno value
812 *
813 * OR
814 *
815 * Input:
816 * buf: C string containing a "-" followed
817 * by an integer value representing a
818 * previously passed in socket file
819 * descriptor
820 * size: non-zero length of C string in @buf
821 * Output:
822 * On success: NFS service no longer listens on that socket;
823 * passed-in buffer filled with a '\n'-terminated C
824 * string containing a unique name of the listener;
825 * return code is the size in bytes of the string
826 * On error: return code is a negative errno value
827 *
828 * OR
829 *
830 * Input:
831 * buf: C string containing a transport
832 * name and an unsigned integer value
833 * representing the port to listen on,
834 * separated by whitespace
835 * size: non-zero length of C string in @buf
836 * Output:
837 * On success: returns zero; NFS service is started
838 * On error: return code is a negative errno value
839 *
840 * OR
841 *
842 * Input:
843 * buf: C string containing a "-" followed
844 * by a transport name and an unsigned
845 * integer value representing the port
846 * to listen on, separated by whitespace
847 * size: non-zero length of C string in @buf
848 * Output:
849 * On success: returns zero; NFS service no longer listens
850 * on that transport
851 * On error: return code is a negative errno value
852 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400853static ssize_t write_ports(struct file *file, char *buf, size_t size)
854{
855 ssize_t rv;
Jeff Layton3dd98a32008-06-10 08:40:36 -0400856
Neil Brownbedbdd82008-06-10 08:40:35 -0400857 mutex_lock(&nfsd_mutex);
858 rv = __write_ports(file, buf, size);
859 mutex_unlock(&nfsd_mutex);
860 return rv;
861}
862
863
NeilBrown596bbe52006-10-04 02:15:48 -0700864int nfsd_max_blksize;
865
Chuck Lever262a0982008-12-12 16:57:35 -0500866/**
867 * write_maxblksize - Set or report the current NFS blksize
868 *
869 * Input:
870 * buf: ignored
871 * size: zero
872 *
873 * OR
874 *
875 * Input:
876 * buf: C string containing an unsigned
877 * integer value representing the new
878 * NFS blksize
879 * size: non-zero length of C string in @buf
880 * Output:
881 * On success: passed-in buffer filled with '\n'-terminated C string
882 * containing numeric value of the current NFS blksize
883 * setting;
884 * return code is the size in bytes of the string
885 * On error: return code is zero or a negative errno value
886 */
NeilBrown596bbe52006-10-04 02:15:48 -0700887static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
888{
889 char *mesg = buf;
890 if (size > 0) {
891 int bsize;
892 int rv = get_int(&mesg, &bsize);
893 if (rv)
894 return rv;
895 /* force bsize into allowed range and
896 * required alignment.
897 */
898 if (bsize < 1024)
899 bsize = 1024;
900 if (bsize > NFSSVC_MAXBLKSIZE)
901 bsize = NFSSVC_MAXBLKSIZE;
902 bsize &= ~(1024-1);
Neil Brownbedbdd82008-06-10 08:40:35 -0400903 mutex_lock(&nfsd_mutex);
J. Bruce Fields7fa53cc2010-08-06 18:00:33 -0400904 if (nfsd_serv) {
Neil Brownbedbdd82008-06-10 08:40:35 -0400905 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700906 return -EBUSY;
907 }
908 nfsd_max_blksize = bsize;
Neil Brownbedbdd82008-06-10 08:40:35 -0400909 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700910 }
Chuck Levere06b6402009-04-23 19:33:25 -0400911
912 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
913 nfsd_max_blksize);
NeilBrown596bbe52006-10-04 02:15:48 -0700914}
915
NeilBrown70c3b762005-11-07 01:00:25 -0800916#ifdef CONFIG_NFSD_V4
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500917static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 char *mesg = buf;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500920 int rv, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
922 if (size > 0) {
Jeff Layton3dd98a32008-06-10 08:40:36 -0400923 if (nfsd_serv)
924 return -EBUSY;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500925 rv = get_int(&mesg, &i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 if (rv)
927 return rv;
J. Bruce Fieldse7b184f2010-03-02 11:18:40 -0500928 /*
929 * Some sanity checking. We don't have a reason for
930 * these particular numbers, but problems with the
931 * extremes are:
932 * - Too short: the briefest network outage may
933 * cause clients to lose all their locks. Also,
934 * the frequent polling may be wasteful.
935 * - Too long: do you really want reboot recovery
936 * to take more than an hour? Or to make other
937 * clients wait an hour before being able to
938 * revoke a dead client's locks?
939 */
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500940 if (i < 10 || i > 3600)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 return -EINVAL;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500942 *time = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 }
Chuck Levere06b6402009-04-23 19:33:25 -0400944
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500945 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
946}
947
948static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
949{
950 ssize_t rv;
951
952 mutex_lock(&nfsd_mutex);
953 rv = __nfsd4_write_time(file, buf, size, time);
954 mutex_unlock(&nfsd_mutex);
955 return rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956}
957
Chuck Lever262a0982008-12-12 16:57:35 -0500958/**
959 * write_leasetime - Set or report the current NFSv4 lease time
960 *
961 * Input:
962 * buf: ignored
963 * size: zero
964 *
965 * OR
966 *
967 * Input:
968 * buf: C string containing an unsigned
969 * integer value representing the new
970 * NFSv4 lease expiry time
971 * size: non-zero length of C string in @buf
972 * Output:
973 * On success: passed-in buffer filled with '\n'-terminated C
974 * string containing unsigned integer value of the
975 * current lease expiry time;
976 * return code is the size in bytes of the string
977 * On error: return code is zero or a negative errno value
978 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400979static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
980{
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500981 return nfsd4_write_time(file, buf, size, &nfsd4_lease);
Jeff Layton3dd98a32008-06-10 08:40:36 -0400982}
983
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -0500984/**
985 * write_gracetime - Set or report current NFSv4 grace period time
986 *
987 * As above, but sets the time of the NFSv4 grace period.
988 *
989 * Note this should never be set to less than the *previous*
990 * lease-period time, but we don't try to enforce this. (In the common
991 * case (a new boot), we don't know what the previous lease time was
992 * anyway.)
993 */
994static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
995{
996 return nfsd4_write_time(file, buf, size, &nfsd4_grace);
997}
998
Jeff Layton3dd98a32008-06-10 08:40:36 -0400999extern char *nfs4_recoverydir(void);
1000
1001static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
NeilBrown0964a3d2005-06-23 22:04:32 -07001002{
1003 char *mesg = buf;
1004 char *recdir;
1005 int len, status;
1006
Jeff Layton3dd98a32008-06-10 08:40:36 -04001007 if (size > 0) {
1008 if (nfsd_serv)
1009 return -EBUSY;
1010 if (size > PATH_MAX || buf[size-1] != '\n')
1011 return -EINVAL;
1012 buf[size-1] = 0;
NeilBrown0964a3d2005-06-23 22:04:32 -07001013
Jeff Layton3dd98a32008-06-10 08:40:36 -04001014 recdir = mesg;
1015 len = qword_get(&mesg, recdir, size);
1016 if (len <= 0)
1017 return -EINVAL;
NeilBrown0964a3d2005-06-23 22:04:32 -07001018
Jeff Layton3dd98a32008-06-10 08:40:36 -04001019 status = nfs4_reset_recoverydir(recdir);
Andi Kleen69049962010-07-20 15:24:27 -07001020 if (status)
1021 return status;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001022 }
Chuck Lever3d72ab82009-04-23 19:33:10 -04001023
1024 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1025 nfs4_recoverydir());
NeilBrown0964a3d2005-06-23 22:04:32 -07001026}
Jeff Layton3dd98a32008-06-10 08:40:36 -04001027
Chuck Lever262a0982008-12-12 16:57:35 -05001028/**
1029 * write_recoverydir - Set or report the pathname of the recovery directory
1030 *
1031 * Input:
1032 * buf: ignored
1033 * size: zero
1034 *
1035 * OR
1036 *
1037 * Input:
1038 * buf: C string containing the pathname
1039 * of the directory on a local file
1040 * system containing permanent NFSv4
1041 * recovery data
1042 * size: non-zero length of C string in @buf
1043 * Output:
1044 * On success: passed-in buffer filled with '\n'-terminated C string
1045 * containing the current recovery pathname setting;
1046 * return code is the size in bytes of the string
1047 * On error: return code is zero or a negative errno value
1048 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001049static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1050{
1051 ssize_t rv;
1052
1053 mutex_lock(&nfsd_mutex);
1054 rv = __write_recoverydir(file, buf, size);
1055 mutex_unlock(&nfsd_mutex);
1056 return rv;
1057}
1058
NeilBrown70c3b762005-11-07 01:00:25 -08001059#endif
NeilBrown0964a3d2005-06-23 22:04:32 -07001060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061/*----------------------------------------------------------------------------*/
1062/*
1063 * populating the filesystem.
1064 */
1065
1066static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1067{
1068 static struct tree_descr nfsd_files[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
J. Bruce Fieldse8e87532009-12-14 12:53:32 -05001070 [NFSD_Export_features] = {"export_features",
1071 &export_features_operations, S_IRUGO},
Wendy Cheng4373ea82008-01-17 11:10:12 -05001072 [NFSD_FO_UnlockIP] = {"unlock_ip",
1073 &transaction_ops, S_IWUSR|S_IRUSR},
Wendy Cheng17efa372008-01-17 11:10:12 -05001074 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1075 &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1077 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -07001078 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Banks03cf6c92009-01-13 21:26:36 +11001079 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
NeilBrown70c3b762005-11-07 01:00:25 -08001080 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -07001081 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -07001082 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001083#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -05001084 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001085#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086#ifdef CONFIG_NFSD_V4
1087 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -05001088 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -07001089 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090#endif
1091 /* last one */ {""}
1092 };
1093 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1094}
1095
Al Virofc14f2f2010-07-25 01:48:30 +04001096static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1097 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098{
Al Virofc14f2f2010-07-25 01:48:30 +04001099 return mount_single(fs_type, flags, data, nfsd_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100}
1101
1102static struct file_system_type nfsd_fs_type = {
1103 .owner = THIS_MODULE,
1104 .name = "nfsd",
Al Virofc14f2f2010-07-25 01:48:30 +04001105 .mount = nfsd_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 .kill_sb = kill_litter_super,
1107};
1108
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001109#ifdef CONFIG_PROC_FS
1110static int create_proc_exports_entry(void)
1111{
1112 struct proc_dir_entry *entry;
1113
1114 entry = proc_mkdir("fs/nfs", NULL);
1115 if (!entry)
1116 return -ENOMEM;
Denis V. Lunev9ef2db22008-04-29 01:02:04 -07001117 entry = proc_create("exports", 0, entry, &exports_operations);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001118 if (!entry)
1119 return -ENOMEM;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001120 return 0;
1121}
1122#else /* CONFIG_PROC_FS */
1123static int create_proc_exports_entry(void)
1124{
1125 return 0;
1126}
1127#endif
1128
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001129int nfsd_net_id;
1130static struct pernet_operations nfsd_net_ops = {
1131 .id = &nfsd_net_id,
1132 .size = sizeof(struct nfsd_net),
1133};
1134
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135static int __init init_nfsd(void)
1136{
1137 int retval;
1138 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1139
Jeff Layton813fd322012-03-21 09:52:08 -04001140 retval = rpc_pipefs_notifier_register(&nfsd4_cld_block);
1141 if (retval)
1142 return retval;
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001143 retval = register_pernet_subsys(&nfsd_net_ops);
1144 if (retval < 0)
Jeff Layton813fd322012-03-21 09:52:08 -04001145 goto out_unregister_notifier;
Bryan Schumaker72083392011-11-01 15:24:59 -04001146 retval = nfsd4_init_slabs();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001147 if (retval)
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001148 goto out_unregister_pernet;
Bryan Schumaker72083392011-11-01 15:24:59 -04001149 nfs4_state_init();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001150 retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */
1151 if (retval)
1152 goto out_free_slabs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001154 retval = nfsd_reply_cache_init();
1155 if (retval)
1156 goto out_free_stat;
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001157 retval = nfsd_export_init();
1158 if (retval)
1159 goto out_free_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001161 retval = nfsd_idmap_init();
1162 if (retval)
1163 goto out_free_lockd;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001164 retval = create_proc_exports_entry();
1165 if (retval)
1166 goto out_free_idmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -05001168 if (retval)
1169 goto out_free_all;
1170 return 0;
1171out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001172 remove_proc_entry("fs/nfs/exports", NULL);
1173 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001174out_free_idmap:
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001175 nfsd_idmap_shutdown();
1176out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001177 nfsd_lockd_shutdown();
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001178 nfsd_export_shutdown();
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001179out_free_cache:
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001180 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001181out_free_stat:
1182 nfsd_stat_shutdown();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001183 nfsd_fault_inject_cleanup();
1184out_free_slabs:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001185 nfsd4_free_slabs();
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001186out_unregister_pernet:
1187 unregister_pernet_subsys(&nfsd_net_ops);
Jeff Layton813fd322012-03-21 09:52:08 -04001188out_unregister_notifier:
1189 rpc_pipefs_notifier_unregister(&nfsd4_cld_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 return retval;
1191}
1192
1193static void __exit exit_nfsd(void)
1194{
1195 nfsd_export_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001196 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 remove_proc_entry("fs/nfs/exports", NULL);
1198 remove_proc_entry("fs/nfs", NULL);
1199 nfsd_stat_shutdown();
1200 nfsd_lockd_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 nfsd_idmap_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001202 nfsd4_free_slabs();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001203 nfsd_fault_inject_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 unregister_filesystem(&nfsd_fs_type);
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001205 unregister_pernet_subsys(&nfsd_net_ops);
Jeff Layton813fd322012-03-21 09:52:08 -04001206 rpc_pipefs_notifier_unregister(&nfsd4_cld_block);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207}
1208
1209MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1210MODULE_LICENSE("GPL");
1211module_init(init_nfsd)
1212module_exit(exit_nfsd)