blob: b14417740816de053d64df298f98ddce2dac1055 [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{
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400130 int err;
131 struct seq_file *seq;
Stanislav Kinsburskye5f06f72012-04-11 15:13:28 +0400132 struct nfsd_net *nn = net_generic(&init_net, nfsd_net_id);
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400133
134 err = seq_open(file, &nfs_exports_op);
135 if (err)
136 return err;
137
138 seq = file->private_data;
Stanislav Kinsburskye5f06f72012-04-11 15:13:28 +0400139 seq->private = nn->svc_export_cache;
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400140 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800143static const struct file_operations exports_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 .open = exports_open,
145 .read = seq_read,
146 .llseek = seq_lseek,
147 .release = seq_release,
Denis V. Lunev9ef2db22008-04-29 01:02:04 -0700148 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149};
150
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500151static int export_features_show(struct seq_file *m, void *v)
152{
153 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
154 return 0;
155}
156
157static int export_features_open(struct inode *inode, struct file *file)
158{
159 return single_open(file, export_features_show, NULL);
160}
161
162static struct file_operations export_features_operations = {
163 .open = export_features_open,
164 .read = seq_read,
165 .llseek = seq_lseek,
166 .release = single_release,
167};
168
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400169#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500170static int supported_enctypes_show(struct seq_file *m, void *v)
171{
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400172 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500173 return 0;
174}
175
176static int supported_enctypes_open(struct inode *inode, struct file *file)
177{
178 return single_open(file, supported_enctypes_show, NULL);
179}
180
181static struct file_operations supported_enctypes_ops = {
182 .open = supported_enctypes_open,
183 .read = seq_read,
184 .llseek = seq_lseek,
185 .release = single_release,
186};
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400187#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500188
Greg Banks03cf6c92009-01-13 21:26:36 +1100189extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900190extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
Greg Banks03cf6c92009-01-13 21:26:36 +1100191
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700192static const struct file_operations pool_stats_operations = {
Greg Banks03cf6c92009-01-13 21:26:36 +1100193 .open = nfsd_pool_stats_open,
194 .read = seq_read,
195 .llseek = seq_lseek,
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900196 .release = nfsd_pool_stats_release,
Greg Banks03cf6c92009-01-13 21:26:36 +1100197 .owner = THIS_MODULE,
198};
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200/*----------------------------------------------------------------------------*/
201/*
202 * payload - write methods
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 */
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
Chuck Lever262a0982008-12-12 16:57:35 -0500206/**
207 * write_unlock_ip - Release all locks used by a client
208 *
209 * Experimental.
210 *
211 * Input:
212 * buf: '\n'-terminated C string containing a
Chuck Lever41160922009-08-09 15:09:40 -0400213 * presentation format IP address
Chuck Lever262a0982008-12-12 16:57:35 -0500214 * size: length of C string in @buf
215 * Output:
216 * On success: returns zero if all specified locks were released;
217 * returns one if one or more locks were not released
218 * On error: return code is negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500219 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500220static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500221{
Chuck Lever41160922009-08-09 15:09:40 -0400222 struct sockaddr_storage address;
223 struct sockaddr *sap = (struct sockaddr *)&address;
224 size_t salen = sizeof(address);
Chuck Lever367c8c72008-06-30 18:58:14 -0400225 char *fo_path;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500226
227 /* sanity check */
228 if (size == 0)
229 return -EINVAL;
230
231 if (buf[size-1] != '\n')
232 return -EINVAL;
233
234 fo_path = buf;
235 if (qword_get(&buf, fo_path, size) < 0)
236 return -EINVAL;
237
Stanislav Kinsbursky90100b12012-01-13 13:09:19 +0400238 if (rpc_pton(&init_net, fo_path, size, sap, salen) == 0)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500239 return -EINVAL;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500240
Chuck Lever41160922009-08-09 15:09:40 -0400241 return nlmsvc_unlock_all_by_ip(sap);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500242}
243
Chuck Lever262a0982008-12-12 16:57:35 -0500244/**
245 * write_unlock_fs - Release all locks on a local file system
246 *
247 * Experimental.
248 *
249 * Input:
250 * buf: '\n'-terminated C string containing the
251 * absolute pathname of a local file system
252 * size: length of C string in @buf
253 * Output:
254 * On success: returns zero if all specified locks were released;
255 * returns one if one or more locks were not released
256 * On error: return code is negative errno value
257 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500258static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
Wendy Cheng17efa372008-01-17 11:10:12 -0500259{
Al Viroa63bb992008-08-02 01:03:36 -0400260 struct path path;
Wendy Cheng17efa372008-01-17 11:10:12 -0500261 char *fo_path;
262 int error;
263
264 /* sanity check */
265 if (size == 0)
266 return -EINVAL;
267
268 if (buf[size-1] != '\n')
269 return -EINVAL;
270
271 fo_path = buf;
272 if (qword_get(&buf, fo_path, size) < 0)
273 return -EINVAL;
274
Al Viroa63bb992008-08-02 01:03:36 -0400275 error = kern_path(fo_path, 0, &path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500276 if (error)
277 return error;
278
Chuck Lever262a0982008-12-12 16:57:35 -0500279 /*
280 * XXX: Needs better sanity checking. Otherwise we could end up
281 * releasing locks on the wrong file system.
282 *
283 * For example:
284 * 1. Does the path refer to a directory?
285 * 2. Is that directory a mount point, or
286 * 3. Is that directory the root of an exported file system?
287 */
Al Virod8c95842011-12-07 18:16:57 -0500288 error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);
Wendy Cheng17efa372008-01-17 11:10:12 -0500289
Al Viroa63bb992008-08-02 01:03:36 -0400290 path_put(&path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500291 return error;
292}
293
Chuck Lever262a0982008-12-12 16:57:35 -0500294/**
295 * write_filehandle - Get a variable-length NFS file handle by path
296 *
297 * On input, the buffer contains a '\n'-terminated C string comprised of
298 * three alphanumeric words separated by whitespace. The string may
299 * contain escape sequences.
300 *
301 * Input:
302 * buf:
303 * domain: client domain name
304 * path: export pathname
305 * maxsize: numeric maximum size of
306 * @buf
307 * size: length of C string in @buf
308 * Output:
309 * On success: passed-in buffer filled with '\n'-terminated C
310 * string containing a ASCII hex text version
311 * of the NFS file handle;
312 * return code is the size in bytes of the string
313 * On error: return code is negative errno value
314 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
316{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700318 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 char *mesg = buf;
320 int len;
321 struct auth_domain *dom;
322 struct knfsd_fh fh;
323
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500324 if (size == 0)
325 return -EINVAL;
326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 if (buf[size-1] != '\n')
328 return -EINVAL;
329 buf[size-1] = 0;
330
331 dname = mesg;
332 len = qword_get(&mesg, dname, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500333 if (len <= 0)
334 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336 path = dname+len+1;
337 len = qword_get(&mesg, path, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500338 if (len <= 0)
339 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341 len = get_int(&mesg, &maxsize);
342 if (len)
343 return len;
344
345 if (maxsize < NFS_FHSIZE)
346 return -EINVAL;
347 if (maxsize > NFS3_FHSIZE)
348 maxsize = NFS3_FHSIZE;
349
350 if (qword_get(&mesg, mesg, size)>0)
351 return -EINVAL;
352
353 /* we have all the words, they are in buf.. */
354 dom = unix_domain_find(dname);
355 if (!dom)
356 return -ENOMEM;
357
Stanislav Kinsburskyb3853e02012-04-11 15:13:21 +0400358 len = exp_rootfh(&init_net, dom, path, &fh, maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 auth_domain_put(dom);
360 if (len)
361 return len;
362
Chuck Lever54224f02008-12-12 16:57:20 -0500363 mesg = buf;
364 len = SIMPLE_TRANSACTION_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
366 mesg[-1] = '\n';
367 return mesg - buf;
368}
369
Chuck Lever262a0982008-12-12 16:57:35 -0500370/**
371 * write_threads - Start NFSD, or report the current number of running threads
372 *
373 * Input:
374 * buf: ignored
375 * size: zero
376 * Output:
377 * On success: passed-in buffer filled with '\n'-terminated C
378 * string numeric value representing the number of
379 * running NFSD threads;
380 * return code is the size in bytes of the string
381 * On error: return code is zero
382 *
383 * OR
384 *
385 * Input:
386 * buf: C string containing an unsigned
387 * integer value representing the
388 * number of NFSD threads to start
389 * size: non-zero length of C string in @buf
390 * Output:
391 * On success: NFS service is started;
392 * passed-in buffer filled with '\n'-terminated C
393 * string numeric value representing the number of
394 * running NFSD threads;
395 * return code is the size in bytes of the string
396 * On error: return code is zero or a negative errno value
397 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398static ssize_t write_threads(struct file *file, char *buf, size_t size)
399{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 char *mesg = buf;
401 int rv;
402 if (size > 0) {
403 int newthreads;
404 rv = get_int(&mesg, &newthreads);
405 if (rv)
406 return rv;
Chuck Lever9e074852008-12-12 16:57:27 -0500407 if (newthreads < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 return -EINVAL;
Chuck Lever9e074852008-12-12 16:57:27 -0500409 rv = nfsd_svc(NFS_PORT, newthreads);
NeilBrown82e12fe2009-06-16 11:03:07 +1000410 if (rv < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 return rv;
NeilBrown82e12fe2009-06-16 11:03:07 +1000412 } else
413 rv = nfsd_nrthreads();
Chuck Levere06b6402009-04-23 19:33:25 -0400414
NeilBrown82e12fe2009-06-16 11:03:07 +1000415 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416}
417
Chuck Lever262a0982008-12-12 16:57:35 -0500418/**
419 * write_pool_threads - Set or report the current number of threads per pool
420 *
421 * Input:
422 * buf: ignored
423 * size: zero
424 *
425 * OR
426 *
427 * Input:
428 * buf: C string containing whitespace-
429 * separated unsigned integer values
430 * representing the number of NFSD
431 * threads to start in each pool
432 * size: non-zero length of C string in @buf
433 * Output:
434 * On success: passed-in buffer filled with '\n'-terminated C
435 * string containing integer values representing the
436 * number of NFSD threads in each pool;
437 * return code is the size in bytes of the string
438 * On error: return code is zero or a negative errno value
439 */
Greg Bankseed29652006-10-02 02:18:02 -0700440static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
441{
442 /* if size > 0, look for an array of number of threads per node
443 * and apply them then write out number of threads per node as reply
444 */
445 char *mesg = buf;
446 int i;
447 int rv;
448 int len;
Neil Brownbedbdd82008-06-10 08:40:35 -0400449 int npools;
Greg Bankseed29652006-10-02 02:18:02 -0700450 int *nthreads;
451
Neil Brownbedbdd82008-06-10 08:40:35 -0400452 mutex_lock(&nfsd_mutex);
453 npools = nfsd_nrpools();
Greg Bankseed29652006-10-02 02:18:02 -0700454 if (npools == 0) {
455 /*
456 * NFS is shut down. The admin can start it by
457 * writing to the threads file but NOT the pool_threads
458 * file, sorry. Report zero threads.
459 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400460 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700461 strcpy(buf, "0\n");
462 return strlen(buf);
463 }
464
465 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
Neil Brownbedbdd82008-06-10 08:40:35 -0400466 rv = -ENOMEM;
Greg Bankseed29652006-10-02 02:18:02 -0700467 if (nthreads == NULL)
Neil Brownbedbdd82008-06-10 08:40:35 -0400468 goto out_free;
Greg Bankseed29652006-10-02 02:18:02 -0700469
470 if (size > 0) {
471 for (i = 0; i < npools; i++) {
472 rv = get_int(&mesg, &nthreads[i]);
473 if (rv == -ENOENT)
474 break; /* fewer numbers than pools */
475 if (rv)
476 goto out_free; /* syntax error */
477 rv = -EINVAL;
478 if (nthreads[i] < 0)
479 goto out_free;
480 }
481 rv = nfsd_set_nrthreads(i, nthreads);
482 if (rv)
483 goto out_free;
484 }
485
486 rv = nfsd_get_nrthreads(npools, nthreads);
487 if (rv)
488 goto out_free;
489
490 mesg = buf;
491 size = SIMPLE_TRANSACTION_LIMIT;
492 for (i = 0; i < npools && size > 0; i++) {
493 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
494 len = strlen(mesg);
495 size -= len;
496 mesg += len;
497 }
J. Bruce Fields413d63d7102009-07-28 11:37:25 -0400498 rv = mesg - buf;
Greg Bankseed29652006-10-02 02:18:02 -0700499out_free:
500 kfree(nthreads);
Neil Brownbedbdd82008-06-10 08:40:35 -0400501 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700502 return rv;
503}
504
Jeff Layton3dd98a32008-06-10 08:40:36 -0400505static ssize_t __write_versions(struct file *file, char *buf, size_t size)
NeilBrown70c3b762005-11-07 01:00:25 -0800506{
NeilBrown70c3b762005-11-07 01:00:25 -0800507 char *mesg = buf;
Benny Halevy8daf2202009-04-03 08:28:59 +0300508 char *vers, *minorp, sign;
Chuck Lever261758b2009-04-23 19:33:18 -0400509 int len, num, remaining;
Benny Halevy8daf2202009-04-03 08:28:59 +0300510 unsigned minor;
NeilBrown70c3b762005-11-07 01:00:25 -0800511 ssize_t tlen = 0;
512 char *sep;
513
514 if (size>0) {
515 if (nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700516 /* Cannot change versions without updating
517 * nfsd_serv->sv_xdrsize, and reallocing
518 * rq_argp and rq_resp
519 */
NeilBrown70c3b762005-11-07 01:00:25 -0800520 return -EBUSY;
521 if (buf[size-1] != '\n')
522 return -EINVAL;
523 buf[size-1] = 0;
524
525 vers = mesg;
526 len = qword_get(&mesg, vers, size);
527 if (len <= 0) return -EINVAL;
528 do {
529 sign = *vers;
530 if (sign == '+' || sign == '-')
Benny Halevy8daf2202009-04-03 08:28:59 +0300531 num = simple_strtol((vers+1), &minorp, 0);
NeilBrown70c3b762005-11-07 01:00:25 -0800532 else
Benny Halevy8daf2202009-04-03 08:28:59 +0300533 num = simple_strtol(vers, &minorp, 0);
534 if (*minorp == '.') {
535 if (num < 4)
536 return -EINVAL;
537 minor = simple_strtoul(minorp+1, NULL, 0);
538 if (minor == 0)
539 return -EINVAL;
540 if (nfsd_minorversion(minor, sign == '-' ?
541 NFSD_CLEAR : NFSD_SET) < 0)
542 return -EINVAL;
543 goto next;
544 }
NeilBrown70c3b762005-11-07 01:00:25 -0800545 switch(num) {
546 case 2:
547 case 3:
548 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700549 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800550 break;
551 default:
552 return -EINVAL;
553 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300554 next:
NeilBrown70c3b762005-11-07 01:00:25 -0800555 vers += len + 1;
NeilBrown70c3b762005-11-07 01:00:25 -0800556 } while ((len = qword_get(&mesg, vers, size)) > 0);
557 /* If all get turned off, turn them back on, as
558 * having no versions is BAD
559 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700560 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800561 }
Chuck Lever261758b2009-04-23 19:33:18 -0400562
NeilBrown70c3b762005-11-07 01:00:25 -0800563 /* Now write current state into reply buffer */
564 len = 0;
565 sep = "";
Chuck Lever261758b2009-04-23 19:33:18 -0400566 remaining = SIMPLE_TRANSACTION_LIMIT;
NeilBrown70c3b762005-11-07 01:00:25 -0800567 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700568 if (nfsd_vers(num, NFSD_AVAIL)) {
Chuck Lever261758b2009-04-23 19:33:18 -0400569 len = snprintf(buf, remaining, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700570 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800571 num);
572 sep = " ";
Chuck Lever261758b2009-04-23 19:33:18 -0400573
574 if (len > remaining)
575 break;
576 remaining -= len;
577 buf += len;
578 tlen += len;
NeilBrown70c3b762005-11-07 01:00:25 -0800579 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300580 if (nfsd_vers(4, NFSD_AVAIL))
Chuck Lever261758b2009-04-23 19:33:18 -0400581 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
582 minor++) {
583 len = snprintf(buf, remaining, " %c4.%u",
Benny Halevy8daf2202009-04-03 08:28:59 +0300584 (nfsd_vers(4, NFSD_TEST) &&
585 nfsd_minorversion(minor, NFSD_TEST)) ?
586 '+' : '-',
587 minor);
Chuck Lever261758b2009-04-23 19:33:18 -0400588
589 if (len > remaining)
590 break;
591 remaining -= len;
592 buf += len;
593 tlen += len;
594 }
595
596 len = snprintf(buf, remaining, "\n");
597 if (len > remaining)
598 return -EINVAL;
599 return tlen + len;
NeilBrown70c3b762005-11-07 01:00:25 -0800600}
601
Chuck Lever262a0982008-12-12 16:57:35 -0500602/**
603 * write_versions - Set or report the available NFS protocol versions
604 *
605 * Input:
606 * buf: ignored
607 * size: zero
608 * Output:
609 * On success: passed-in buffer filled with '\n'-terminated C
610 * string containing positive or negative integer
611 * values representing the current status of each
612 * protocol version;
613 * return code is the size in bytes of the string
614 * On error: return code is zero or a negative errno value
615 *
616 * OR
617 *
618 * Input:
619 * buf: C string containing whitespace-
620 * separated positive or negative
621 * integer values representing NFS
622 * protocol versions to enable ("+n")
623 * or disable ("-n")
624 * size: non-zero length of C string in @buf
625 * Output:
626 * On success: status of zero or more protocol versions has
627 * been updated; passed-in buffer filled with
628 * '\n'-terminated C string containing positive
629 * or negative integer values representing the
630 * current status of each protocol version;
631 * return code is the size in bytes of the string
632 * On error: return code is zero or a negative errno value
633 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400634static ssize_t write_versions(struct file *file, char *buf, size_t size)
635{
636 ssize_t rv;
637
638 mutex_lock(&nfsd_mutex);
639 rv = __write_versions(file, buf, size);
640 mutex_unlock(&nfsd_mutex);
641 return rv;
642}
643
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400644/*
Chuck Lever0a5372d2009-04-23 19:32:10 -0400645 * Zero-length write. Return a list of NFSD's current listener
646 * transports.
647 */
648static ssize_t __write_ports_names(char *buf)
649{
650 if (nfsd_serv == NULL)
651 return 0;
Chuck Lever335c54b2009-04-23 19:32:25 -0400652 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Lever0a5372d2009-04-23 19:32:10 -0400653}
654
655/*
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400656 * A single 'fd' number was written, in which case it must be for
657 * a socket of a supported family/protocol, and we use it as an
658 * nfsd listener.
659 */
660static ssize_t __write_ports_addfd(char *buf)
661{
662 char *mesg = buf;
663 int fd, err;
664
665 err = get_int(&mesg, &fd);
666 if (err != 0 || fd < 0)
667 return -EINVAL;
668
669 err = nfsd_create_serv();
670 if (err != 0)
671 return err;
672
Chuck Leverbfba9ab2009-04-23 19:32:33 -0400673 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400674 if (err < 0) {
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400675 svc_destroy(nfsd_serv);
676 return err;
677 }
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400678
Chuck Leverea068ba2009-04-23 19:32:18 -0400679 /* Decrease the count, but don't shut down the service */
680 nfsd_serv->sv_nrthreads--;
681 return err;
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400682}
683
684/*
Chuck Lever82d56592009-04-23 19:31:48 -0400685 * A '-' followed by the 'name' of a socket means we close the socket.
686 */
687static ssize_t __write_ports_delfd(char *buf)
688{
689 char *toclose;
690 int len = 0;
691
692 toclose = kstrdup(buf + 1, GFP_KERNEL);
693 if (toclose == NULL)
694 return -ENOMEM;
695
696 if (nfsd_serv != NULL)
Chuck Lever8435d342009-04-23 19:32:40 -0400697 len = svc_sock_names(nfsd_serv, buf,
698 SIMPLE_TRANSACTION_LIMIT, toclose);
Chuck Lever82d56592009-04-23 19:31:48 -0400699 kfree(toclose);
700 return len;
701}
702
703/*
Chuck Lever4eb68c22009-04-23 19:31:40 -0400704 * A transport listener is added by writing it's transport name and
705 * a port number.
706 */
707static ssize_t __write_ports_addxprt(char *buf)
708{
709 char transport[16];
Chuck Lever37498292010-01-26 14:04:22 -0500710 struct svc_xprt *xprt;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400711 int port, err;
712
713 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
714 return -EINVAL;
715
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700716 if (port < 1 || port > USHRT_MAX)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400717 return -EINVAL;
718
719 err = nfsd_create_serv();
720 if (err != 0)
721 return err;
722
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +0400723 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever4eb68c22009-04-23 19:31:40 -0400724 PF_INET, port, SVC_SOCK_ANONYMOUS);
Chuck Lever68717902010-01-26 14:04:13 -0500725 if (err < 0)
Chuck Lever37498292010-01-26 14:04:22 -0500726 goto out_err;
727
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +0400728 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever37498292010-01-26 14:04:22 -0500729 PF_INET6, port, SVC_SOCK_ANONYMOUS);
730 if (err < 0 && err != -EAFNOSUPPORT)
731 goto out_close;
Jeff Layton0cd14a02010-07-19 16:50:06 -0400732
733 /* Decrease the count, but don't shut down the service */
734 nfsd_serv->sv_nrthreads--;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400735 return 0;
Chuck Lever37498292010-01-26 14:04:22 -0500736out_close:
Stanislav Kinsbursky4cb54ca2012-01-20 16:50:53 +0400737 xprt = svc_find_xprt(nfsd_serv, transport, &init_net, PF_INET, port);
Chuck Lever37498292010-01-26 14:04:22 -0500738 if (xprt != NULL) {
739 svc_close_xprt(xprt);
740 svc_xprt_put(xprt);
741 }
742out_err:
Jeff Layton0cd14a02010-07-19 16:50:06 -0400743 svc_destroy(nfsd_serv);
Chuck Lever37498292010-01-26 14:04:22 -0500744 return err;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400745}
746
747/*
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400748 * A transport listener is removed by writing a "-", it's transport
749 * name, and it's port number.
750 */
751static ssize_t __write_ports_delxprt(char *buf)
752{
753 struct svc_xprt *xprt;
754 char transport[16];
755 int port;
756
757 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
758 return -EINVAL;
759
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700760 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400761 return -EINVAL;
762
Stanislav Kinsbursky4cb54ca2012-01-20 16:50:53 +0400763 xprt = svc_find_xprt(nfsd_serv, transport, &init_net, AF_UNSPEC, port);
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400764 if (xprt == NULL)
765 return -ENOTCONN;
766
767 svc_close_xprt(xprt);
768 svc_xprt_put(xprt);
769 return 0;
770}
771
Neil Brownbedbdd82008-06-10 08:40:35 -0400772static ssize_t __write_ports(struct file *file, char *buf, size_t size)
NeilBrown80212d52006-10-02 02:17:47 -0700773{
Chuck Lever0a5372d2009-04-23 19:32:10 -0400774 if (size == 0)
775 return __write_ports_names(buf);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400776
777 if (isdigit(buf[0]))
778 return __write_ports_addfd(buf);
Chuck Lever82d56592009-04-23 19:31:48 -0400779
780 if (buf[0] == '-' && isdigit(buf[1]))
781 return __write_ports_delfd(buf);
Chuck Lever4eb68c22009-04-23 19:31:40 -0400782
783 if (isalpha(buf[0]))
784 return __write_ports_addxprt(buf);
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400785
786 if (buf[0] == '-' && isalpha(buf[1]))
787 return __write_ports_delxprt(buf);
788
NeilBrownb41b66d2006-10-02 02:17:48 -0700789 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -0700790}
791
Chuck Lever262a0982008-12-12 16:57:35 -0500792/**
793 * write_ports - Pass a socket file descriptor or transport name to listen on
794 *
795 * Input:
796 * buf: ignored
797 * size: zero
798 * Output:
799 * On success: passed-in buffer filled with a '\n'-terminated C
800 * string containing a whitespace-separated list of
801 * named NFSD listeners;
802 * return code is the size in bytes of the string
803 * On error: return code is zero or a negative errno value
804 *
805 * OR
806 *
807 * Input:
808 * buf: C string containing an unsigned
809 * integer value representing a bound
810 * but unconnected socket that is to be
Chuck Leverc71206a2009-04-23 19:32:03 -0400811 * used as an NFSD listener; listen(3)
812 * must be called for a SOCK_STREAM
813 * socket, otherwise it is ignored
Chuck Lever262a0982008-12-12 16:57:35 -0500814 * size: non-zero length of C string in @buf
815 * Output:
816 * On success: NFS service is started;
817 * passed-in buffer filled with a '\n'-terminated C
818 * string containing a unique alphanumeric name of
819 * the listener;
820 * return code is the size in bytes of the string
821 * On error: return code is a negative errno value
822 *
823 * OR
824 *
825 * Input:
826 * buf: C string containing a "-" followed
827 * by an integer value representing a
828 * previously passed in socket file
829 * descriptor
830 * size: non-zero length of C string in @buf
831 * Output:
832 * On success: NFS service no longer listens on that socket;
833 * passed-in buffer filled with a '\n'-terminated C
834 * string containing a unique name of the listener;
835 * return code is the size in bytes of the string
836 * On error: return code is a negative errno value
837 *
838 * OR
839 *
840 * Input:
841 * buf: C string containing a transport
842 * name and an unsigned integer value
843 * representing the port to listen on,
844 * separated by whitespace
845 * size: non-zero length of C string in @buf
846 * Output:
847 * On success: returns zero; NFS service is started
848 * On error: return code is a negative errno value
849 *
850 * OR
851 *
852 * Input:
853 * buf: C string containing a "-" followed
854 * by a transport name and an unsigned
855 * integer value representing the port
856 * to listen on, separated by whitespace
857 * size: non-zero length of C string in @buf
858 * Output:
859 * On success: returns zero; NFS service no longer listens
860 * on that transport
861 * On error: return code is a negative errno value
862 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400863static ssize_t write_ports(struct file *file, char *buf, size_t size)
864{
865 ssize_t rv;
Jeff Layton3dd98a32008-06-10 08:40:36 -0400866
Neil Brownbedbdd82008-06-10 08:40:35 -0400867 mutex_lock(&nfsd_mutex);
868 rv = __write_ports(file, buf, size);
869 mutex_unlock(&nfsd_mutex);
870 return rv;
871}
872
873
NeilBrown596bbe52006-10-04 02:15:48 -0700874int nfsd_max_blksize;
875
Chuck Lever262a0982008-12-12 16:57:35 -0500876/**
877 * write_maxblksize - Set or report the current NFS blksize
878 *
879 * Input:
880 * buf: ignored
881 * size: zero
882 *
883 * OR
884 *
885 * Input:
886 * buf: C string containing an unsigned
887 * integer value representing the new
888 * NFS blksize
889 * size: non-zero length of C string in @buf
890 * Output:
891 * On success: passed-in buffer filled with '\n'-terminated C string
892 * containing numeric value of the current NFS blksize
893 * setting;
894 * return code is the size in bytes of the string
895 * On error: return code is zero or a negative errno value
896 */
NeilBrown596bbe52006-10-04 02:15:48 -0700897static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
898{
899 char *mesg = buf;
900 if (size > 0) {
901 int bsize;
902 int rv = get_int(&mesg, &bsize);
903 if (rv)
904 return rv;
905 /* force bsize into allowed range and
906 * required alignment.
907 */
908 if (bsize < 1024)
909 bsize = 1024;
910 if (bsize > NFSSVC_MAXBLKSIZE)
911 bsize = NFSSVC_MAXBLKSIZE;
912 bsize &= ~(1024-1);
Neil Brownbedbdd82008-06-10 08:40:35 -0400913 mutex_lock(&nfsd_mutex);
J. Bruce Fields7fa53cc2010-08-06 18:00:33 -0400914 if (nfsd_serv) {
Neil Brownbedbdd82008-06-10 08:40:35 -0400915 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700916 return -EBUSY;
917 }
918 nfsd_max_blksize = bsize;
Neil Brownbedbdd82008-06-10 08:40:35 -0400919 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700920 }
Chuck Levere06b6402009-04-23 19:33:25 -0400921
922 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
923 nfsd_max_blksize);
NeilBrown596bbe52006-10-04 02:15:48 -0700924}
925
NeilBrown70c3b762005-11-07 01:00:25 -0800926#ifdef CONFIG_NFSD_V4
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500927static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 char *mesg = buf;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500930 int rv, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
932 if (size > 0) {
Jeff Layton3dd98a32008-06-10 08:40:36 -0400933 if (nfsd_serv)
934 return -EBUSY;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500935 rv = get_int(&mesg, &i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 if (rv)
937 return rv;
J. Bruce Fieldse7b184f2010-03-02 11:18:40 -0500938 /*
939 * Some sanity checking. We don't have a reason for
940 * these particular numbers, but problems with the
941 * extremes are:
942 * - Too short: the briefest network outage may
943 * cause clients to lose all their locks. Also,
944 * the frequent polling may be wasteful.
945 * - Too long: do you really want reboot recovery
946 * to take more than an hour? Or to make other
947 * clients wait an hour before being able to
948 * revoke a dead client's locks?
949 */
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500950 if (i < 10 || i > 3600)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 return -EINVAL;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500952 *time = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 }
Chuck Levere06b6402009-04-23 19:33:25 -0400954
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500955 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
956}
957
958static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
959{
960 ssize_t rv;
961
962 mutex_lock(&nfsd_mutex);
963 rv = __nfsd4_write_time(file, buf, size, time);
964 mutex_unlock(&nfsd_mutex);
965 return rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966}
967
Chuck Lever262a0982008-12-12 16:57:35 -0500968/**
969 * write_leasetime - Set or report the current NFSv4 lease time
970 *
971 * Input:
972 * buf: ignored
973 * size: zero
974 *
975 * OR
976 *
977 * Input:
978 * buf: C string containing an unsigned
979 * integer value representing the new
980 * NFSv4 lease expiry time
981 * size: non-zero length of C string in @buf
982 * Output:
983 * On success: passed-in buffer filled with '\n'-terminated C
984 * string containing unsigned integer value of the
985 * current lease expiry time;
986 * return code is the size in bytes of the string
987 * On error: return code is zero or a negative errno value
988 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400989static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
990{
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500991 return nfsd4_write_time(file, buf, size, &nfsd4_lease);
Jeff Layton3dd98a32008-06-10 08:40:36 -0400992}
993
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -0500994/**
995 * write_gracetime - Set or report current NFSv4 grace period time
996 *
997 * As above, but sets the time of the NFSv4 grace period.
998 *
999 * Note this should never be set to less than the *previous*
1000 * lease-period time, but we don't try to enforce this. (In the common
1001 * case (a new boot), we don't know what the previous lease time was
1002 * anyway.)
1003 */
1004static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
1005{
1006 return nfsd4_write_time(file, buf, size, &nfsd4_grace);
1007}
1008
Jeff Layton3dd98a32008-06-10 08:40:36 -04001009extern char *nfs4_recoverydir(void);
1010
1011static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
NeilBrown0964a3d2005-06-23 22:04:32 -07001012{
1013 char *mesg = buf;
1014 char *recdir;
1015 int len, status;
1016
Jeff Layton3dd98a32008-06-10 08:40:36 -04001017 if (size > 0) {
1018 if (nfsd_serv)
1019 return -EBUSY;
1020 if (size > PATH_MAX || buf[size-1] != '\n')
1021 return -EINVAL;
1022 buf[size-1] = 0;
NeilBrown0964a3d2005-06-23 22:04:32 -07001023
Jeff Layton3dd98a32008-06-10 08:40:36 -04001024 recdir = mesg;
1025 len = qword_get(&mesg, recdir, size);
1026 if (len <= 0)
1027 return -EINVAL;
NeilBrown0964a3d2005-06-23 22:04:32 -07001028
Jeff Layton3dd98a32008-06-10 08:40:36 -04001029 status = nfs4_reset_recoverydir(recdir);
Andi Kleen69049962010-07-20 15:24:27 -07001030 if (status)
1031 return status;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001032 }
Chuck Lever3d72ab82009-04-23 19:33:10 -04001033
1034 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1035 nfs4_recoverydir());
NeilBrown0964a3d2005-06-23 22:04:32 -07001036}
Jeff Layton3dd98a32008-06-10 08:40:36 -04001037
Chuck Lever262a0982008-12-12 16:57:35 -05001038/**
1039 * write_recoverydir - Set or report the pathname of the recovery directory
1040 *
1041 * Input:
1042 * buf: ignored
1043 * size: zero
1044 *
1045 * OR
1046 *
1047 * Input:
1048 * buf: C string containing the pathname
1049 * of the directory on a local file
1050 * system containing permanent NFSv4
1051 * recovery data
1052 * size: non-zero length of C string in @buf
1053 * Output:
1054 * On success: passed-in buffer filled with '\n'-terminated C string
1055 * containing the current recovery pathname setting;
1056 * return code is the size in bytes of the string
1057 * On error: return code is zero or a negative errno value
1058 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001059static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1060{
1061 ssize_t rv;
1062
1063 mutex_lock(&nfsd_mutex);
1064 rv = __write_recoverydir(file, buf, size);
1065 mutex_unlock(&nfsd_mutex);
1066 return rv;
1067}
1068
NeilBrown70c3b762005-11-07 01:00:25 -08001069#endif
NeilBrown0964a3d2005-06-23 22:04:32 -07001070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071/*----------------------------------------------------------------------------*/
1072/*
1073 * populating the filesystem.
1074 */
1075
1076static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1077{
1078 static struct tree_descr nfsd_files[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
J. Bruce Fieldse8e87532009-12-14 12:53:32 -05001080 [NFSD_Export_features] = {"export_features",
1081 &export_features_operations, S_IRUGO},
Wendy Cheng4373ea82008-01-17 11:10:12 -05001082 [NFSD_FO_UnlockIP] = {"unlock_ip",
1083 &transaction_ops, S_IWUSR|S_IRUSR},
Wendy Cheng17efa372008-01-17 11:10:12 -05001084 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1085 &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1087 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -07001088 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Banks03cf6c92009-01-13 21:26:36 +11001089 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
NeilBrown70c3b762005-11-07 01:00:25 -08001090 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -07001091 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -07001092 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001093#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -05001094 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001095#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096#ifdef CONFIG_NFSD_V4
1097 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -05001098 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -07001099 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100#endif
1101 /* last one */ {""}
1102 };
1103 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1104}
1105
Al Virofc14f2f2010-07-25 01:48:30 +04001106static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1107 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108{
Al Virofc14f2f2010-07-25 01:48:30 +04001109 return mount_single(fs_type, flags, data, nfsd_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110}
1111
1112static struct file_system_type nfsd_fs_type = {
1113 .owner = THIS_MODULE,
1114 .name = "nfsd",
Al Virofc14f2f2010-07-25 01:48:30 +04001115 .mount = nfsd_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 .kill_sb = kill_litter_super,
1117};
1118
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001119#ifdef CONFIG_PROC_FS
1120static int create_proc_exports_entry(void)
1121{
1122 struct proc_dir_entry *entry;
1123
1124 entry = proc_mkdir("fs/nfs", NULL);
1125 if (!entry)
1126 return -ENOMEM;
Denis V. Lunev9ef2db22008-04-29 01:02:04 -07001127 entry = proc_create("exports", 0, entry, &exports_operations);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001128 if (!entry)
1129 return -ENOMEM;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001130 return 0;
1131}
1132#else /* CONFIG_PROC_FS */
1133static int create_proc_exports_entry(void)
1134{
1135 return 0;
1136}
1137#endif
1138
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001139int nfsd_net_id;
1140static struct pernet_operations nfsd_net_ops = {
1141 .id = &nfsd_net_id,
1142 .size = sizeof(struct nfsd_net),
1143};
1144
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145static int __init init_nfsd(void)
1146{
1147 int retval;
1148 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1149
Jeff Layton797a9d72012-03-29 07:52:49 -04001150 retval = register_cld_notifier();
Jeff Layton813fd322012-03-21 09:52:08 -04001151 if (retval)
1152 return retval;
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001153 retval = register_pernet_subsys(&nfsd_net_ops);
1154 if (retval < 0)
Jeff Layton813fd322012-03-21 09:52:08 -04001155 goto out_unregister_notifier;
Bryan Schumaker72083392011-11-01 15:24:59 -04001156 retval = nfsd4_init_slabs();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001157 if (retval)
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001158 goto out_unregister_pernet;
Bryan Schumaker72083392011-11-01 15:24:59 -04001159 nfs4_state_init();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001160 retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */
1161 if (retval)
1162 goto out_free_slabs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001164 retval = nfsd_reply_cache_init();
1165 if (retval)
1166 goto out_free_stat;
Stanislav Kinsburskyb89109b2012-04-11 15:13:14 +04001167 retval = nfsd_export_init(&init_net);
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001168 if (retval)
1169 goto out_free_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001171 retval = nfsd_idmap_init();
1172 if (retval)
1173 goto out_free_lockd;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001174 retval = create_proc_exports_entry();
1175 if (retval)
1176 goto out_free_idmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -05001178 if (retval)
1179 goto out_free_all;
1180 return 0;
1181out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001182 remove_proc_entry("fs/nfs/exports", NULL);
1183 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001184out_free_idmap:
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001185 nfsd_idmap_shutdown();
1186out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001187 nfsd_lockd_shutdown();
Stanislav Kinsburskyb89109b2012-04-11 15:13:14 +04001188 nfsd_export_shutdown(&init_net);
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001189out_free_cache:
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001190 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001191out_free_stat:
1192 nfsd_stat_shutdown();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001193 nfsd_fault_inject_cleanup();
1194out_free_slabs:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001195 nfsd4_free_slabs();
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001196out_unregister_pernet:
1197 unregister_pernet_subsys(&nfsd_net_ops);
Jeff Layton813fd322012-03-21 09:52:08 -04001198out_unregister_notifier:
Jeff Layton797a9d72012-03-29 07:52:49 -04001199 unregister_cld_notifier();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 return retval;
1201}
1202
1203static void __exit exit_nfsd(void)
1204{
Stanislav Kinsburskyb89109b2012-04-11 15:13:14 +04001205 nfsd_export_shutdown(&init_net);
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001206 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 remove_proc_entry("fs/nfs/exports", NULL);
1208 remove_proc_entry("fs/nfs", NULL);
1209 nfsd_stat_shutdown();
1210 nfsd_lockd_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 nfsd_idmap_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001212 nfsd4_free_slabs();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001213 nfsd_fault_inject_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 unregister_filesystem(&nfsd_fs_type);
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001215 unregister_pernet_subsys(&nfsd_net_ops);
Jeff Layton797a9d72012-03-29 07:52:49 -04001216 unregister_cld_notifier();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217}
1218
1219MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1220MODULE_LICENSE("GPL");
1221module_init(init_nfsd)
1222module_exit(exit_nfsd)