blob: 68a4d320cd14f577e6719f0761a136055dccdd4b [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>
Jeff Layton59766872013-02-04 12:50:00 -050013#include <linux/sunrpc/addr.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 Schumakerf3c75212012-11-27 09:35:10 -050022#include "state.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,
Jeff Laytona2f999a2013-03-27 10:15:38 -040038 NFSD_Reply_Cache_Stats,
NeilBrown70c3b762005-11-07 01:00:25 -080039 NFSD_Versions,
NeilBrown80212d52006-10-02 02:17:47 -070040 NFSD_Ports,
NeilBrown596bbe52006-10-04 02:15:48 -070041 NFSD_MaxBlkSize,
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050042 NFSD_SupportedEnctypes,
NeilBrown70c3b762005-11-07 01:00:25 -080043 /*
44 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
45 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
46 */
47#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 NFSD_Leasetime,
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050049 NFSD_Gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070050 NFSD_RecoveryDir,
NeilBrown70c3b762005-11-07 01:00:25 -080051#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070052};
53
54/*
55 * write() for these nodes.
56 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070057static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
Chuck Leverb046ccd2008-12-12 16:57:13 -050058static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
59static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static ssize_t write_threads(struct file *file, char *buf, size_t size);
Greg Bankseed29652006-10-02 02:18:02 -070061static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080062static ssize_t write_versions(struct file *file, char *buf, size_t size);
NeilBrown80212d52006-10-02 02:17:47 -070063static ssize_t write_ports(struct file *file, char *buf, size_t size);
NeilBrown596bbe52006-10-04 02:15:48 -070064static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080065#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070066static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050067static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
NeilBrown0964a3d2005-06-23 22:04:32 -070068static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080069#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71static ssize_t (*write_op[])(struct file *, char *, size_t) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 [NFSD_Fh] = write_filehandle,
Chuck Leverb046ccd2008-12-12 16:57:13 -050073 [NFSD_FO_UnlockIP] = write_unlock_ip,
74 [NFSD_FO_UnlockFS] = write_unlock_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 [NFSD_Threads] = write_threads,
Greg Bankseed29652006-10-02 02:18:02 -070076 [NFSD_Pool_Threads] = write_pool_threads,
NeilBrown70c3b762005-11-07 01:00:25 -080077 [NFSD_Versions] = write_versions,
NeilBrown80212d52006-10-02 02:17:47 -070078 [NFSD_Ports] = write_ports,
NeilBrown596bbe52006-10-04 02:15:48 -070079 [NFSD_MaxBlkSize] = write_maxblksize,
NeilBrown70c3b762005-11-07 01:00:25 -080080#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 [NFSD_Leasetime] = write_leasetime,
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050082 [NFSD_Gracetime] = write_gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070083 [NFSD_RecoveryDir] = write_recoverydir,
NeilBrown70c3b762005-11-07 01:00:25 -080084#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070085};
86
87static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
88{
Al Viro496ad9a2013-01-23 17:07:38 -050089 ino_t ino = file_inode(file)->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 char *data;
91 ssize_t rv;
92
Tobias Klausere8c96f82006-03-24 03:15:34 -080093 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 return -EINVAL;
95
96 data = simple_transaction_get(file, buf, size);
97 if (IS_ERR(data))
98 return PTR_ERR(data);
99
100 rv = write_op[ino](file, data, size);
NeilBrown8971a102007-02-14 00:33:11 -0800101 if (rv >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 simple_transaction_set(file, rv);
103 rv = size;
104 }
105 return rv;
106}
107
NeilBrown73900222005-11-07 01:00:24 -0800108static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
109{
110 if (! file->private_data) {
111 /* An attempt to read a transaction file without writing
112 * causes a 0-byte write so that the file can return
113 * state information
114 */
115 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
116 if (rv < 0)
117 return rv;
118 }
119 return simple_transaction_read(file, buf, size, pos);
120}
121
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800122static const struct file_operations transaction_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 .write = nfsctl_transaction_write,
NeilBrown73900222005-11-07 01:00:24 -0800124 .read = nfsctl_transaction_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 .release = simple_transaction_release,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200126 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127};
128
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +0300129static int exports_net_open(struct net *net, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400131 int err;
132 struct seq_file *seq;
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +0300133 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400134
135 err = seq_open(file, &nfs_exports_op);
136 if (err)
137 return err;
138
139 seq = file->private_data;
Stanislav Kinsburskye5f06f72012-04-11 15:13:28 +0400140 seq->private = nn->svc_export_cache;
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400141 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}
143
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +0300144static int exports_proc_open(struct inode *inode, struct file *file)
145{
146 return exports_net_open(current->nsproxy->net_ns, file);
147}
148
149static const struct file_operations exports_proc_operations = {
150 .open = exports_proc_open,
151 .read = seq_read,
152 .llseek = seq_lseek,
153 .release = seq_release,
154 .owner = THIS_MODULE,
155};
156
157static int exports_nfsd_open(struct inode *inode, struct file *file)
158{
159 return exports_net_open(inode->i_sb->s_fs_info, file);
160}
161
162static const struct file_operations exports_nfsd_operations = {
163 .open = exports_nfsd_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 .read = seq_read,
165 .llseek = seq_lseek,
166 .release = seq_release,
Denis V. Lunev9ef2db22008-04-29 01:02:04 -0700167 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168};
169
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500170static int export_features_show(struct seq_file *m, void *v)
171{
172 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
173 return 0;
174}
175
176static int export_features_open(struct inode *inode, struct file *file)
177{
178 return single_open(file, export_features_show, NULL);
179}
180
181static struct file_operations export_features_operations = {
182 .open = export_features_open,
183 .read = seq_read,
184 .llseek = seq_lseek,
185 .release = single_release,
186};
187
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400188#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500189static int supported_enctypes_show(struct seq_file *m, void *v)
190{
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400191 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500192 return 0;
193}
194
195static int supported_enctypes_open(struct inode *inode, struct file *file)
196{
197 return single_open(file, supported_enctypes_show, NULL);
198}
199
200static struct file_operations supported_enctypes_ops = {
201 .open = supported_enctypes_open,
202 .read = seq_read,
203 .llseek = seq_lseek,
204 .release = single_release,
205};
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400206#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500207
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700208static const struct file_operations pool_stats_operations = {
Greg Banks03cf6c92009-01-13 21:26:36 +1100209 .open = nfsd_pool_stats_open,
210 .read = seq_read,
211 .llseek = seq_lseek,
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900212 .release = nfsd_pool_stats_release,
Greg Banks03cf6c92009-01-13 21:26:36 +1100213 .owner = THIS_MODULE,
214};
215
Jeff Laytona2f999a2013-03-27 10:15:38 -0400216static struct file_operations reply_cache_stats_operations = {
217 .open = nfsd_reply_cache_stats_open,
218 .read = seq_read,
219 .llseek = seq_lseek,
220 .release = single_release,
221};
222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223/*----------------------------------------------------------------------------*/
224/*
225 * payload - write methods
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 */
227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Chuck Lever262a0982008-12-12 16:57:35 -0500229/**
230 * write_unlock_ip - Release all locks used by a client
231 *
232 * Experimental.
233 *
234 * Input:
235 * buf: '\n'-terminated C string containing a
Chuck Lever41160922009-08-09 15:09:40 -0400236 * presentation format IP address
Chuck Lever262a0982008-12-12 16:57:35 -0500237 * size: length of C string in @buf
238 * Output:
239 * On success: returns zero if all specified locks were released;
240 * returns one if one or more locks were not released
241 * On error: return code is negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500242 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500243static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500244{
Chuck Lever41160922009-08-09 15:09:40 -0400245 struct sockaddr_storage address;
246 struct sockaddr *sap = (struct sockaddr *)&address;
247 size_t salen = sizeof(address);
Chuck Lever367c8c72008-06-30 18:58:14 -0400248 char *fo_path;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300249 struct net *net = file->f_dentry->d_sb->s_fs_info;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500250
251 /* sanity check */
252 if (size == 0)
253 return -EINVAL;
254
255 if (buf[size-1] != '\n')
256 return -EINVAL;
257
258 fo_path = buf;
259 if (qword_get(&buf, fo_path, size) < 0)
260 return -EINVAL;
261
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300262 if (rpc_pton(net, fo_path, size, sap, salen) == 0)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500263 return -EINVAL;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500264
Chuck Lever41160922009-08-09 15:09:40 -0400265 return nlmsvc_unlock_all_by_ip(sap);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500266}
267
Chuck Lever262a0982008-12-12 16:57:35 -0500268/**
269 * write_unlock_fs - Release all locks on a local file system
270 *
271 * Experimental.
272 *
273 * Input:
274 * buf: '\n'-terminated C string containing the
275 * absolute pathname of a local file system
276 * size: length of C string in @buf
277 * Output:
278 * On success: returns zero if all specified locks were released;
279 * returns one if one or more locks were not released
280 * On error: return code is negative errno value
281 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500282static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
Wendy Cheng17efa372008-01-17 11:10:12 -0500283{
Al Viroa63bb992008-08-02 01:03:36 -0400284 struct path path;
Wendy Cheng17efa372008-01-17 11:10:12 -0500285 char *fo_path;
286 int error;
287
288 /* sanity check */
289 if (size == 0)
290 return -EINVAL;
291
292 if (buf[size-1] != '\n')
293 return -EINVAL;
294
295 fo_path = buf;
296 if (qword_get(&buf, fo_path, size) < 0)
297 return -EINVAL;
298
Al Viroa63bb992008-08-02 01:03:36 -0400299 error = kern_path(fo_path, 0, &path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500300 if (error)
301 return error;
302
Chuck Lever262a0982008-12-12 16:57:35 -0500303 /*
304 * XXX: Needs better sanity checking. Otherwise we could end up
305 * releasing locks on the wrong file system.
306 *
307 * For example:
308 * 1. Does the path refer to a directory?
309 * 2. Is that directory a mount point, or
310 * 3. Is that directory the root of an exported file system?
311 */
Al Virod8c95842011-12-07 18:16:57 -0500312 error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);
Wendy Cheng17efa372008-01-17 11:10:12 -0500313
Al Viroa63bb992008-08-02 01:03:36 -0400314 path_put(&path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500315 return error;
316}
317
Chuck Lever262a0982008-12-12 16:57:35 -0500318/**
319 * write_filehandle - Get a variable-length NFS file handle by path
320 *
321 * On input, the buffer contains a '\n'-terminated C string comprised of
322 * three alphanumeric words separated by whitespace. The string may
323 * contain escape sequences.
324 *
325 * Input:
326 * buf:
327 * domain: client domain name
328 * path: export pathname
329 * maxsize: numeric maximum size of
330 * @buf
331 * size: length of C string in @buf
332 * Output:
333 * On success: passed-in buffer filled with '\n'-terminated C
334 * string containing a ASCII hex text version
335 * of the NFS file handle;
336 * return code is the size in bytes of the string
337 * On error: return code is negative errno value
338 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
340{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700342 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 char *mesg = buf;
344 int len;
345 struct auth_domain *dom;
346 struct knfsd_fh fh;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300347 struct net *net = file->f_dentry->d_sb->s_fs_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500349 if (size == 0)
350 return -EINVAL;
351
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 if (buf[size-1] != '\n')
353 return -EINVAL;
354 buf[size-1] = 0;
355
356 dname = mesg;
357 len = qword_get(&mesg, dname, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500358 if (len <= 0)
359 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 path = dname+len+1;
362 len = qword_get(&mesg, path, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500363 if (len <= 0)
364 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366 len = get_int(&mesg, &maxsize);
367 if (len)
368 return len;
369
370 if (maxsize < NFS_FHSIZE)
371 return -EINVAL;
372 if (maxsize > NFS3_FHSIZE)
373 maxsize = NFS3_FHSIZE;
374
375 if (qword_get(&mesg, mesg, size)>0)
376 return -EINVAL;
377
378 /* we have all the words, they are in buf.. */
379 dom = unix_domain_find(dname);
380 if (!dom)
381 return -ENOMEM;
382
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300383 len = exp_rootfh(net, dom, path, &fh, maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 auth_domain_put(dom);
385 if (len)
386 return len;
387
Chuck Lever54224f02008-12-12 16:57:20 -0500388 mesg = buf;
389 len = SIMPLE_TRANSACTION_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
391 mesg[-1] = '\n';
392 return mesg - buf;
393}
394
Chuck Lever262a0982008-12-12 16:57:35 -0500395/**
396 * write_threads - Start NFSD, or report the current number of running threads
397 *
398 * Input:
399 * buf: ignored
400 * size: zero
401 * Output:
402 * On success: passed-in buffer filled with '\n'-terminated C
403 * string numeric value representing the number of
404 * running NFSD threads;
405 * return code is the size in bytes of the string
406 * On error: return code is zero
407 *
408 * OR
409 *
410 * Input:
411 * buf: C string containing an unsigned
412 * integer value representing the
413 * number of NFSD threads to start
414 * size: non-zero length of C string in @buf
415 * Output:
416 * On success: NFS service is started;
417 * passed-in buffer filled with '\n'-terminated C
418 * string numeric value representing the number of
419 * running NFSD threads;
420 * return code is the size in bytes of the string
421 * On error: return code is zero or a negative errno value
422 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423static ssize_t write_threads(struct file *file, char *buf, size_t size)
424{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 char *mesg = buf;
426 int rv;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300427 struct net *net = file->f_dentry->d_sb->s_fs_info;
Stanislav Kinsburskyd41a9412012-12-10 12:19:25 +0300428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 if (size > 0) {
430 int newthreads;
431 rv = get_int(&mesg, &newthreads);
432 if (rv)
433 return rv;
Chuck Lever9e074852008-12-12 16:57:27 -0500434 if (newthreads < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 return -EINVAL;
Stanislav Kinsburskyd41a9412012-12-10 12:19:25 +0300436 rv = nfsd_svc(newthreads, net);
NeilBrown82e12fe2009-06-16 11:03:07 +1000437 if (rv < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 return rv;
NeilBrown82e12fe2009-06-16 11:03:07 +1000439 } else
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300440 rv = nfsd_nrthreads(net);
Chuck Levere06b6402009-04-23 19:33:25 -0400441
NeilBrown82e12fe2009-06-16 11:03:07 +1000442 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443}
444
Chuck Lever262a0982008-12-12 16:57:35 -0500445/**
446 * write_pool_threads - Set or report the current number of threads per pool
447 *
448 * Input:
449 * buf: ignored
450 * size: zero
451 *
452 * OR
453 *
454 * Input:
455 * buf: C string containing whitespace-
456 * separated unsigned integer values
457 * representing the number of NFSD
458 * threads to start in each pool
459 * size: non-zero length of C string in @buf
460 * Output:
461 * On success: passed-in buffer filled with '\n'-terminated C
462 * string containing integer values representing the
463 * number of NFSD threads in each pool;
464 * return code is the size in bytes of the string
465 * On error: return code is zero or a negative errno value
466 */
Greg Bankseed29652006-10-02 02:18:02 -0700467static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
468{
469 /* if size > 0, look for an array of number of threads per node
470 * and apply them then write out number of threads per node as reply
471 */
472 char *mesg = buf;
473 int i;
474 int rv;
475 int len;
Neil Brownbedbdd82008-06-10 08:40:35 -0400476 int npools;
Greg Bankseed29652006-10-02 02:18:02 -0700477 int *nthreads;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300478 struct net *net = file->f_dentry->d_sb->s_fs_info;
Greg Bankseed29652006-10-02 02:18:02 -0700479
Neil Brownbedbdd82008-06-10 08:40:35 -0400480 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300481 npools = nfsd_nrpools(net);
Greg Bankseed29652006-10-02 02:18:02 -0700482 if (npools == 0) {
483 /*
484 * NFS is shut down. The admin can start it by
485 * writing to the threads file but NOT the pool_threads
486 * file, sorry. Report zero threads.
487 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400488 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700489 strcpy(buf, "0\n");
490 return strlen(buf);
491 }
492
493 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
Neil Brownbedbdd82008-06-10 08:40:35 -0400494 rv = -ENOMEM;
Greg Bankseed29652006-10-02 02:18:02 -0700495 if (nthreads == NULL)
Neil Brownbedbdd82008-06-10 08:40:35 -0400496 goto out_free;
Greg Bankseed29652006-10-02 02:18:02 -0700497
498 if (size > 0) {
499 for (i = 0; i < npools; i++) {
500 rv = get_int(&mesg, &nthreads[i]);
501 if (rv == -ENOENT)
502 break; /* fewer numbers than pools */
503 if (rv)
504 goto out_free; /* syntax error */
505 rv = -EINVAL;
506 if (nthreads[i] < 0)
507 goto out_free;
508 }
Stanislav Kinsbursky3938a0d2012-12-10 12:19:30 +0300509 rv = nfsd_set_nrthreads(i, nthreads, net);
Greg Bankseed29652006-10-02 02:18:02 -0700510 if (rv)
511 goto out_free;
512 }
513
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300514 rv = nfsd_get_nrthreads(npools, nthreads, net);
Greg Bankseed29652006-10-02 02:18:02 -0700515 if (rv)
516 goto out_free;
517
518 mesg = buf;
519 size = SIMPLE_TRANSACTION_LIMIT;
520 for (i = 0; i < npools && size > 0; i++) {
521 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
522 len = strlen(mesg);
523 size -= len;
524 mesg += len;
525 }
J. Bruce Fields413d63d7102009-07-28 11:37:25 -0400526 rv = mesg - buf;
Greg Bankseed29652006-10-02 02:18:02 -0700527out_free:
528 kfree(nthreads);
Neil Brownbedbdd82008-06-10 08:40:35 -0400529 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700530 return rv;
531}
532
Jeff Layton3dd98a32008-06-10 08:40:36 -0400533static ssize_t __write_versions(struct file *file, char *buf, size_t size)
NeilBrown70c3b762005-11-07 01:00:25 -0800534{
NeilBrown70c3b762005-11-07 01:00:25 -0800535 char *mesg = buf;
Benny Halevy8daf2202009-04-03 08:28:59 +0300536 char *vers, *minorp, sign;
Chuck Lever261758b2009-04-23 19:33:18 -0400537 int len, num, remaining;
Benny Halevy8daf2202009-04-03 08:28:59 +0300538 unsigned minor;
NeilBrown70c3b762005-11-07 01:00:25 -0800539 ssize_t tlen = 0;
540 char *sep;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300541 struct net *net = file->f_dentry->d_sb->s_fs_info;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300542 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
NeilBrown70c3b762005-11-07 01:00:25 -0800543
544 if (size>0) {
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300545 if (nn->nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700546 /* Cannot change versions without updating
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300547 * nn->nfsd_serv->sv_xdrsize, and reallocing
NeilBrown6658d3a2006-10-02 02:17:46 -0700548 * rq_argp and rq_resp
549 */
NeilBrown70c3b762005-11-07 01:00:25 -0800550 return -EBUSY;
551 if (buf[size-1] != '\n')
552 return -EINVAL;
553 buf[size-1] = 0;
554
555 vers = mesg;
556 len = qword_get(&mesg, vers, size);
557 if (len <= 0) return -EINVAL;
558 do {
559 sign = *vers;
560 if (sign == '+' || sign == '-')
Benny Halevy8daf2202009-04-03 08:28:59 +0300561 num = simple_strtol((vers+1), &minorp, 0);
NeilBrown70c3b762005-11-07 01:00:25 -0800562 else
Benny Halevy8daf2202009-04-03 08:28:59 +0300563 num = simple_strtol(vers, &minorp, 0);
564 if (*minorp == '.') {
J. Bruce Fieldsff89be82013-01-23 18:25:01 -0500565 if (num != 4)
Benny Halevy8daf2202009-04-03 08:28:59 +0300566 return -EINVAL;
567 minor = simple_strtoul(minorp+1, NULL, 0);
568 if (minor == 0)
569 return -EINVAL;
570 if (nfsd_minorversion(minor, sign == '-' ?
571 NFSD_CLEAR : NFSD_SET) < 0)
572 return -EINVAL;
573 goto next;
574 }
NeilBrown70c3b762005-11-07 01:00:25 -0800575 switch(num) {
576 case 2:
577 case 3:
578 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700579 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800580 break;
581 default:
582 return -EINVAL;
583 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300584 next:
NeilBrown70c3b762005-11-07 01:00:25 -0800585 vers += len + 1;
NeilBrown70c3b762005-11-07 01:00:25 -0800586 } while ((len = qword_get(&mesg, vers, size)) > 0);
587 /* If all get turned off, turn them back on, as
588 * having no versions is BAD
589 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700590 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800591 }
Chuck Lever261758b2009-04-23 19:33:18 -0400592
NeilBrown70c3b762005-11-07 01:00:25 -0800593 /* Now write current state into reply buffer */
594 len = 0;
595 sep = "";
Chuck Lever261758b2009-04-23 19:33:18 -0400596 remaining = SIMPLE_TRANSACTION_LIMIT;
NeilBrown70c3b762005-11-07 01:00:25 -0800597 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700598 if (nfsd_vers(num, NFSD_AVAIL)) {
Chuck Lever261758b2009-04-23 19:33:18 -0400599 len = snprintf(buf, remaining, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700600 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800601 num);
602 sep = " ";
Chuck Lever261758b2009-04-23 19:33:18 -0400603
604 if (len > remaining)
605 break;
606 remaining -= len;
607 buf += len;
608 tlen += len;
NeilBrown70c3b762005-11-07 01:00:25 -0800609 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300610 if (nfsd_vers(4, NFSD_AVAIL))
Chuck Lever261758b2009-04-23 19:33:18 -0400611 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
612 minor++) {
613 len = snprintf(buf, remaining, " %c4.%u",
Benny Halevy8daf2202009-04-03 08:28:59 +0300614 (nfsd_vers(4, NFSD_TEST) &&
615 nfsd_minorversion(minor, NFSD_TEST)) ?
616 '+' : '-',
617 minor);
Chuck Lever261758b2009-04-23 19:33:18 -0400618
619 if (len > remaining)
620 break;
621 remaining -= len;
622 buf += len;
623 tlen += len;
624 }
625
626 len = snprintf(buf, remaining, "\n");
627 if (len > remaining)
628 return -EINVAL;
629 return tlen + len;
NeilBrown70c3b762005-11-07 01:00:25 -0800630}
631
Chuck Lever262a0982008-12-12 16:57:35 -0500632/**
633 * write_versions - Set or report the available NFS protocol versions
634 *
635 * Input:
636 * buf: ignored
637 * size: zero
638 * Output:
639 * On success: passed-in buffer filled with '\n'-terminated C
640 * string containing positive or negative integer
641 * values representing the current status of each
642 * protocol version;
643 * return code is the size in bytes of the string
644 * On error: return code is zero or a negative errno value
645 *
646 * OR
647 *
648 * Input:
649 * buf: C string containing whitespace-
650 * separated positive or negative
651 * integer values representing NFS
652 * protocol versions to enable ("+n")
653 * or disable ("-n")
654 * size: non-zero length of C string in @buf
655 * Output:
656 * On success: status of zero or more protocol versions has
657 * been updated; passed-in buffer filled with
658 * '\n'-terminated C string containing positive
659 * or negative integer values representing the
660 * current status of each protocol version;
661 * return code is the size in bytes of the string
662 * On error: return code is zero or a negative errno value
663 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400664static ssize_t write_versions(struct file *file, char *buf, size_t size)
665{
666 ssize_t rv;
667
668 mutex_lock(&nfsd_mutex);
669 rv = __write_versions(file, buf, size);
670 mutex_unlock(&nfsd_mutex);
671 return rv;
672}
673
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400674/*
Chuck Lever0a5372d2009-04-23 19:32:10 -0400675 * Zero-length write. Return a list of NFSD's current listener
676 * transports.
677 */
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300678static ssize_t __write_ports_names(char *buf, struct net *net)
Chuck Lever0a5372d2009-04-23 19:32:10 -0400679{
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300680 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
681
682 if (nn->nfsd_serv == NULL)
Chuck Lever0a5372d2009-04-23 19:32:10 -0400683 return 0;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300684 return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Lever0a5372d2009-04-23 19:32:10 -0400685}
686
687/*
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400688 * A single 'fd' number was written, in which case it must be for
689 * a socket of a supported family/protocol, and we use it as an
690 * nfsd listener.
691 */
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300692static ssize_t __write_ports_addfd(char *buf, struct net *net)
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400693{
694 char *mesg = buf;
695 int fd, err;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300696 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400697
698 err = get_int(&mesg, &fd);
699 if (err != 0 || fd < 0)
700 return -EINVAL;
701
Stanislav Kinsbursky67774362012-12-10 12:19:20 +0300702 err = nfsd_create_serv(net);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400703 if (err != 0)
704 return err;
705
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300706 err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400707 if (err < 0) {
Stanislav Kinsbursky19f7e2c2012-07-03 16:46:41 +0400708 nfsd_destroy(net);
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400709 return err;
710 }
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400711
Chuck Leverea068ba2009-04-23 19:32:18 -0400712 /* Decrease the count, but don't shut down the service */
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300713 nn->nfsd_serv->sv_nrthreads--;
Chuck Leverea068ba2009-04-23 19:32:18 -0400714 return err;
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400715}
716
717/*
Chuck Lever4eb68c22009-04-23 19:31:40 -0400718 * A transport listener is added by writing it's transport name and
719 * a port number.
720 */
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300721static ssize_t __write_ports_addxprt(char *buf, struct net *net)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400722{
723 char transport[16];
Chuck Lever37498292010-01-26 14:04:22 -0500724 struct svc_xprt *xprt;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400725 int port, err;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300726 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Chuck Lever4eb68c22009-04-23 19:31:40 -0400727
J. Bruce Fieldsa10fded2012-08-14 17:48:39 -0400728 if (sscanf(buf, "%15s %5u", transport, &port) != 2)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400729 return -EINVAL;
730
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700731 if (port < 1 || port > USHRT_MAX)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400732 return -EINVAL;
733
Stanislav Kinsbursky67774362012-12-10 12:19:20 +0300734 err = nfsd_create_serv(net);
Chuck Lever4eb68c22009-04-23 19:31:40 -0400735 if (err != 0)
736 return err;
737
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300738 err = svc_create_xprt(nn->nfsd_serv, transport, net,
Chuck Lever4eb68c22009-04-23 19:31:40 -0400739 PF_INET, port, SVC_SOCK_ANONYMOUS);
Chuck Lever68717902010-01-26 14:04:13 -0500740 if (err < 0)
Chuck Lever37498292010-01-26 14:04:22 -0500741 goto out_err;
742
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300743 err = svc_create_xprt(nn->nfsd_serv, transport, net,
Chuck Lever37498292010-01-26 14:04:22 -0500744 PF_INET6, port, SVC_SOCK_ANONYMOUS);
745 if (err < 0 && err != -EAFNOSUPPORT)
746 goto out_close;
Jeff Layton0cd14a02010-07-19 16:50:06 -0400747
748 /* Decrease the count, but don't shut down the service */
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300749 nn->nfsd_serv->sv_nrthreads--;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400750 return 0;
Chuck Lever37498292010-01-26 14:04:22 -0500751out_close:
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300752 xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port);
Chuck Lever37498292010-01-26 14:04:22 -0500753 if (xprt != NULL) {
754 svc_close_xprt(xprt);
755 svc_xprt_put(xprt);
756 }
757out_err:
Stanislav Kinsbursky19f7e2c2012-07-03 16:46:41 +0400758 nfsd_destroy(net);
Chuck Lever37498292010-01-26 14:04:22 -0500759 return err;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400760}
761
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300762static ssize_t __write_ports(struct file *file, char *buf, size_t size,
763 struct net *net)
NeilBrown80212d52006-10-02 02:17:47 -0700764{
Chuck Lever0a5372d2009-04-23 19:32:10 -0400765 if (size == 0)
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300766 return __write_ports_names(buf, net);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400767
768 if (isdigit(buf[0]))
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300769 return __write_ports_addfd(buf, net);
Chuck Lever82d56592009-04-23 19:31:48 -0400770
Chuck Lever4eb68c22009-04-23 19:31:40 -0400771 if (isalpha(buf[0]))
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300772 return __write_ports_addxprt(buf, net);
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400773
NeilBrownb41b66d2006-10-02 02:17:48 -0700774 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -0700775}
776
Chuck Lever262a0982008-12-12 16:57:35 -0500777/**
778 * write_ports - Pass a socket file descriptor or transport name to listen on
779 *
780 * Input:
781 * buf: ignored
782 * size: zero
783 * Output:
784 * On success: passed-in buffer filled with a '\n'-terminated C
785 * string containing a whitespace-separated list of
786 * named NFSD listeners;
787 * return code is the size in bytes of the string
788 * On error: return code is zero or a negative errno value
789 *
790 * OR
791 *
792 * Input:
793 * buf: C string containing an unsigned
794 * integer value representing a bound
795 * but unconnected socket that is to be
Chuck Leverc71206a2009-04-23 19:32:03 -0400796 * used as an NFSD listener; listen(3)
797 * must be called for a SOCK_STREAM
798 * socket, otherwise it is ignored
Chuck Lever262a0982008-12-12 16:57:35 -0500799 * size: non-zero length of C string in @buf
800 * Output:
801 * On success: NFS service is started;
802 * passed-in buffer filled with a '\n'-terminated C
803 * string containing a unique alphanumeric name of
804 * the listener;
805 * return code is the size in bytes of the string
806 * On error: return code is a negative errno value
807 *
808 * OR
809 *
810 * Input:
Chuck Lever262a0982008-12-12 16:57:35 -0500811 * buf: C string containing a transport
812 * name and an unsigned integer value
813 * representing the port to listen on,
814 * separated by whitespace
815 * size: non-zero length of C string in @buf
816 * Output:
817 * On success: returns zero; NFS service is started
818 * On error: return code is a negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500819 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400820static ssize_t write_ports(struct file *file, char *buf, size_t size)
821{
822 ssize_t rv;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300823 struct net *net = file->f_dentry->d_sb->s_fs_info;
Jeff Layton3dd98a32008-06-10 08:40:36 -0400824
Neil Brownbedbdd82008-06-10 08:40:35 -0400825 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300826 rv = __write_ports(file, buf, size, net);
Neil Brownbedbdd82008-06-10 08:40:35 -0400827 mutex_unlock(&nfsd_mutex);
828 return rv;
829}
830
831
NeilBrown596bbe52006-10-04 02:15:48 -0700832int nfsd_max_blksize;
833
Chuck Lever262a0982008-12-12 16:57:35 -0500834/**
835 * write_maxblksize - Set or report the current NFS blksize
836 *
837 * Input:
838 * buf: ignored
839 * size: zero
840 *
841 * OR
842 *
843 * Input:
844 * buf: C string containing an unsigned
845 * integer value representing the new
846 * NFS blksize
847 * size: non-zero length of C string in @buf
848 * Output:
849 * On success: passed-in buffer filled with '\n'-terminated C string
850 * containing numeric value of the current NFS blksize
851 * setting;
852 * return code is the size in bytes of the string
853 * On error: return code is zero or a negative errno value
854 */
NeilBrown596bbe52006-10-04 02:15:48 -0700855static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
856{
857 char *mesg = buf;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300858 struct net *net = file->f_dentry->d_sb->s_fs_info;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300859 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
860
NeilBrown596bbe52006-10-04 02:15:48 -0700861 if (size > 0) {
862 int bsize;
863 int rv = get_int(&mesg, &bsize);
864 if (rv)
865 return rv;
866 /* force bsize into allowed range and
867 * required alignment.
868 */
869 if (bsize < 1024)
870 bsize = 1024;
871 if (bsize > NFSSVC_MAXBLKSIZE)
872 bsize = NFSSVC_MAXBLKSIZE;
873 bsize &= ~(1024-1);
Neil Brownbedbdd82008-06-10 08:40:35 -0400874 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300875 if (nn->nfsd_serv) {
Neil Brownbedbdd82008-06-10 08:40:35 -0400876 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700877 return -EBUSY;
878 }
879 nfsd_max_blksize = bsize;
Neil Brownbedbdd82008-06-10 08:40:35 -0400880 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700881 }
Chuck Levere06b6402009-04-23 19:33:25 -0400882
883 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
884 nfsd_max_blksize);
NeilBrown596bbe52006-10-04 02:15:48 -0700885}
886
NeilBrown70c3b762005-11-07 01:00:25 -0800887#ifdef CONFIG_NFSD_V4
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300888static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size,
889 time_t *time, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 char *mesg = buf;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500892 int rv, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
894 if (size > 0) {
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300895 if (nn->nfsd_serv)
Jeff Layton3dd98a32008-06-10 08:40:36 -0400896 return -EBUSY;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500897 rv = get_int(&mesg, &i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 if (rv)
899 return rv;
J. Bruce Fieldse7b184f2010-03-02 11:18:40 -0500900 /*
901 * Some sanity checking. We don't have a reason for
902 * these particular numbers, but problems with the
903 * extremes are:
904 * - Too short: the briefest network outage may
905 * cause clients to lose all their locks. Also,
906 * the frequent polling may be wasteful.
907 * - Too long: do you really want reboot recovery
908 * to take more than an hour? Or to make other
909 * clients wait an hour before being able to
910 * revoke a dead client's locks?
911 */
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500912 if (i < 10 || i > 3600)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 return -EINVAL;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500914 *time = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 }
Chuck Levere06b6402009-04-23 19:33:25 -0400916
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500917 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
918}
919
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300920static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size,
921 time_t *time, struct nfsd_net *nn)
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500922{
923 ssize_t rv;
924
925 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300926 rv = __nfsd4_write_time(file, buf, size, time, nn);
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500927 mutex_unlock(&nfsd_mutex);
928 return rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929}
930
Chuck Lever262a0982008-12-12 16:57:35 -0500931/**
932 * write_leasetime - Set or report the current NFSv4 lease time
933 *
934 * Input:
935 * buf: ignored
936 * size: zero
937 *
938 * OR
939 *
940 * Input:
941 * buf: C string containing an unsigned
942 * integer value representing the new
943 * NFSv4 lease expiry time
944 * size: non-zero length of C string in @buf
945 * Output:
946 * On success: passed-in buffer filled with '\n'-terminated C
947 * string containing unsigned integer value of the
948 * current lease expiry time;
949 * return code is the size in bytes of the string
950 * On error: return code is zero or a negative errno value
951 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400952static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
953{
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300954 struct net *net = file->f_dentry->d_sb->s_fs_info;
955 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300956 return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);
Jeff Layton3dd98a32008-06-10 08:40:36 -0400957}
958
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -0500959/**
960 * write_gracetime - Set or report current NFSv4 grace period time
961 *
962 * As above, but sets the time of the NFSv4 grace period.
963 *
964 * Note this should never be set to less than the *previous*
965 * lease-period time, but we don't try to enforce this. (In the common
966 * case (a new boot), we don't know what the previous lease time was
967 * anyway.)
968 */
969static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
970{
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300971 struct net *net = file->f_dentry->d_sb->s_fs_info;
972 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300973 return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -0500974}
975
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300976static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size,
977 struct nfsd_net *nn)
NeilBrown0964a3d2005-06-23 22:04:32 -0700978{
979 char *mesg = buf;
980 char *recdir;
981 int len, status;
982
Jeff Layton3dd98a32008-06-10 08:40:36 -0400983 if (size > 0) {
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300984 if (nn->nfsd_serv)
Jeff Layton3dd98a32008-06-10 08:40:36 -0400985 return -EBUSY;
986 if (size > PATH_MAX || buf[size-1] != '\n')
987 return -EINVAL;
988 buf[size-1] = 0;
NeilBrown0964a3d2005-06-23 22:04:32 -0700989
Jeff Layton3dd98a32008-06-10 08:40:36 -0400990 recdir = mesg;
991 len = qword_get(&mesg, recdir, size);
992 if (len <= 0)
993 return -EINVAL;
NeilBrown0964a3d2005-06-23 22:04:32 -0700994
Jeff Layton3dd98a32008-06-10 08:40:36 -0400995 status = nfs4_reset_recoverydir(recdir);
Andi Kleen69049962010-07-20 15:24:27 -0700996 if (status)
997 return status;
Jeff Layton3dd98a32008-06-10 08:40:36 -0400998 }
Chuck Lever3d72ab82009-04-23 19:33:10 -0400999
1000 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1001 nfs4_recoverydir());
NeilBrown0964a3d2005-06-23 22:04:32 -07001002}
Jeff Layton3dd98a32008-06-10 08:40:36 -04001003
Chuck Lever262a0982008-12-12 16:57:35 -05001004/**
1005 * write_recoverydir - Set or report the pathname of the recovery directory
1006 *
1007 * Input:
1008 * buf: ignored
1009 * size: zero
1010 *
1011 * OR
1012 *
1013 * Input:
1014 * buf: C string containing the pathname
1015 * of the directory on a local file
1016 * system containing permanent NFSv4
1017 * recovery data
1018 * size: non-zero length of C string in @buf
1019 * Output:
1020 * On success: passed-in buffer filled with '\n'-terminated C string
1021 * containing the current recovery pathname setting;
1022 * return code is the size in bytes of the string
1023 * On error: return code is zero or a negative errno value
1024 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001025static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1026{
1027 ssize_t rv;
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +03001028 struct net *net = file->f_dentry->d_sb->s_fs_info;
1029 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Jeff Layton3dd98a32008-06-10 08:40:36 -04001030
1031 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +03001032 rv = __write_recoverydir(file, buf, size, nn);
Jeff Layton3dd98a32008-06-10 08:40:36 -04001033 mutex_unlock(&nfsd_mutex);
1034 return rv;
1035}
1036
NeilBrown70c3b762005-11-07 01:00:25 -08001037#endif
NeilBrown0964a3d2005-06-23 22:04:32 -07001038
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039/*----------------------------------------------------------------------------*/
1040/*
1041 * populating the filesystem.
1042 */
1043
1044static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1045{
1046 static struct tree_descr nfsd_files[] = {
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +03001047 [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO},
J. Bruce Fieldse8e87532009-12-14 12:53:32 -05001048 [NFSD_Export_features] = {"export_features",
1049 &export_features_operations, S_IRUGO},
Wendy Cheng4373ea82008-01-17 11:10:12 -05001050 [NFSD_FO_UnlockIP] = {"unlock_ip",
1051 &transaction_ops, S_IWUSR|S_IRUSR},
Wendy Cheng17efa372008-01-17 11:10:12 -05001052 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1053 &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1055 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -07001056 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Banks03cf6c92009-01-13 21:26:36 +11001057 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
Jeff Laytona2f999a2013-03-27 10:15:38 -04001058 [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO},
NeilBrown70c3b762005-11-07 01:00:25 -08001059 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -07001060 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -07001061 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001062#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -05001063 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001064#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065#ifdef CONFIG_NFSD_V4
1066 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -05001067 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -07001068 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069#endif
1070 /* last one */ {""}
1071 };
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +03001072 struct net *net = data;
1073 int ret;
1074
1075 ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
1076 if (ret)
1077 return ret;
1078 sb->s_fs_info = get_net(net);
1079 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080}
1081
Al Virofc14f2f2010-07-25 01:48:30 +04001082static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1083 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084{
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +03001085 return mount_ns(fs_type, flags, current->nsproxy->net_ns, nfsd_fill_super);
1086}
1087
1088static void nfsd_umount(struct super_block *sb)
1089{
1090 struct net *net = sb->s_fs_info;
1091
1092 kill_litter_super(sb);
1093 put_net(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094}
1095
1096static struct file_system_type nfsd_fs_type = {
1097 .owner = THIS_MODULE,
1098 .name = "nfsd",
Al Virofc14f2f2010-07-25 01:48:30 +04001099 .mount = nfsd_mount,
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +03001100 .kill_sb = nfsd_umount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001102MODULE_ALIAS_FS("nfsd");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001104#ifdef CONFIG_PROC_FS
1105static int create_proc_exports_entry(void)
1106{
1107 struct proc_dir_entry *entry;
1108
1109 entry = proc_mkdir("fs/nfs", NULL);
1110 if (!entry)
1111 return -ENOMEM;
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +03001112 entry = proc_create("exports", 0, entry,
1113 &exports_proc_operations);
fanchaotingff7c4b32013-03-27 16:31:18 +08001114 if (!entry) {
1115 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001116 return -ENOMEM;
fanchaotingff7c4b32013-03-27 16:31:18 +08001117 }
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001118 return 0;
1119}
1120#else /* CONFIG_PROC_FS */
1121static int create_proc_exports_entry(void)
1122{
1123 return 0;
1124}
1125#endif
1126
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001127int nfsd_net_id;
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001128
1129static __net_init int nfsd_init_net(struct net *net)
1130{
1131 int retval;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03001132 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001133
1134 retval = nfsd_export_init(net);
1135 if (retval)
1136 goto out_export_error;
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001137 retval = nfsd_idmap_init(net);
1138 if (retval)
1139 goto out_idmap_error;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03001140 nn->nfsd4_lease = 90; /* default lease time */
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03001141 nn->nfsd4_grace = 90;
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001142 return 0;
1143
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001144out_idmap_error:
1145 nfsd_export_shutdown(net);
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001146out_export_error:
1147 return retval;
1148}
1149
1150static __net_exit void nfsd_exit_net(struct net *net)
1151{
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001152 nfsd_idmap_shutdown(net);
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001153 nfsd_export_shutdown(net);
1154}
1155
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001156static struct pernet_operations nfsd_net_ops = {
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001157 .init = nfsd_init_net,
1158 .exit = nfsd_exit_net,
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001159 .id = &nfsd_net_id,
1160 .size = sizeof(struct nfsd_net),
1161};
1162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163static int __init init_nfsd(void)
1164{
1165 int retval;
1166 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1167
Jeff Layton797a9d72012-03-29 07:52:49 -04001168 retval = register_cld_notifier();
Jeff Layton813fd322012-03-21 09:52:08 -04001169 if (retval)
1170 return retval;
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001171 retval = register_pernet_subsys(&nfsd_net_ops);
1172 if (retval < 0)
Jeff Layton813fd322012-03-21 09:52:08 -04001173 goto out_unregister_notifier;
Bryan Schumaker72083392011-11-01 15:24:59 -04001174 retval = nfsd4_init_slabs();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001175 if (retval)
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001176 goto out_unregister_pernet;
Bryan Schumaker72083392011-11-01 15:24:59 -04001177 nfs4_state_init();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001178 retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */
1179 if (retval)
1180 goto out_free_slabs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001182 retval = nfsd_reply_cache_init();
1183 if (retval)
1184 goto out_free_stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001186 retval = create_proc_exports_entry();
1187 if (retval)
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001188 goto out_free_lockd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -05001190 if (retval)
1191 goto out_free_all;
1192 return 0;
1193out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001194 remove_proc_entry("fs/nfs/exports", NULL);
1195 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001196out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001197 nfsd_lockd_shutdown();
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001198 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001199out_free_stat:
1200 nfsd_stat_shutdown();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001201 nfsd_fault_inject_cleanup();
1202out_free_slabs:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001203 nfsd4_free_slabs();
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001204out_unregister_pernet:
1205 unregister_pernet_subsys(&nfsd_net_ops);
Jeff Layton813fd322012-03-21 09:52:08 -04001206out_unregister_notifier:
Jeff Layton797a9d72012-03-29 07:52:49 -04001207 unregister_cld_notifier();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 return retval;
1209}
1210
1211static void __exit exit_nfsd(void)
1212{
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001213 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 remove_proc_entry("fs/nfs/exports", NULL);
1215 remove_proc_entry("fs/nfs", NULL);
1216 nfsd_stat_shutdown();
1217 nfsd_lockd_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001218 nfsd4_free_slabs();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001219 nfsd_fault_inject_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 unregister_filesystem(&nfsd_fs_type);
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001221 unregister_pernet_subsys(&nfsd_net_ops);
Jeff Layton797a9d72012-03-29 07:52:49 -04001222 unregister_cld_notifier();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223}
1224
1225MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1226MODULE_LICENSE("GPL");
1227module_init(init_nfsd)
1228module_exit(exit_nfsd)