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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"
Christoph Hellwig9cf514c2014-05-05 13:11:59 +020024#include "pnfs.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020025
Linus Torvalds1da177e2005-04-16 15:20:36 -070026/*
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050027 * We have a single directory with several nodes in it.
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 */
29enum {
30 NFSD_Root = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 NFSD_List,
J. Bruce Fieldse8e87532009-12-14 12:53:32 -050032 NFSD_Export_features,
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 NFSD_Fh,
Wendy Cheng4373ea82008-01-17 11:10:12 -050034 NFSD_FO_UnlockIP,
Wendy Cheng17efa372008-01-17 11:10:12 -050035 NFSD_FO_UnlockFS,
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 NFSD_Threads,
Greg Bankseed29652006-10-02 02:18:02 -070037 NFSD_Pool_Threads,
Greg Banks03cf6c92009-01-13 21:26:36 +110038 NFSD_Pool_Stats,
Jeff Laytona2f999a2013-03-27 10:15:38 -040039 NFSD_Reply_Cache_Stats,
NeilBrown70c3b762005-11-07 01:00:25 -080040 NFSD_Versions,
NeilBrown80212d52006-10-02 02:17:47 -070041 NFSD_Ports,
NeilBrown596bbe52006-10-04 02:15:48 -070042 NFSD_MaxBlkSize,
Jeff Layton5b8db002014-07-02 16:11:22 -040043 NFSD_MaxConnections,
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050044 NFSD_SupportedEnctypes,
NeilBrown70c3b762005-11-07 01:00:25 -080045 /*
46 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
47 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
48 */
49#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 NFSD_Leasetime,
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050051 NFSD_Gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070052 NFSD_RecoveryDir,
Jeff Layton7f5ef2e2014-09-12 16:40:21 -040053 NFSD_V4EndGrace,
NeilBrown70c3b762005-11-07 01:00:25 -080054#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070055};
56
57/*
58 * write() for these nodes.
59 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
Chuck Leverb046ccd2008-12-12 16:57:13 -050061static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
62static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static ssize_t write_threads(struct file *file, char *buf, size_t size);
Greg Bankseed29652006-10-02 02:18:02 -070064static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080065static ssize_t write_versions(struct file *file, char *buf, size_t size);
NeilBrown80212d52006-10-02 02:17:47 -070066static ssize_t write_ports(struct file *file, char *buf, size_t size);
NeilBrown596bbe52006-10-04 02:15:48 -070067static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
Jeff Layton5b8db002014-07-02 16:11:22 -040068static ssize_t write_maxconn(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080069#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070070static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050071static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
NeilBrown0964a3d2005-06-23 22:04:32 -070072static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
Jeff Layton7f5ef2e2014-09-12 16:40:21 -040073static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080074#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
76static ssize_t (*write_op[])(struct file *, char *, size_t) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 [NFSD_Fh] = write_filehandle,
Chuck Leverb046ccd2008-12-12 16:57:13 -050078 [NFSD_FO_UnlockIP] = write_unlock_ip,
79 [NFSD_FO_UnlockFS] = write_unlock_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 [NFSD_Threads] = write_threads,
Greg Bankseed29652006-10-02 02:18:02 -070081 [NFSD_Pool_Threads] = write_pool_threads,
NeilBrown70c3b762005-11-07 01:00:25 -080082 [NFSD_Versions] = write_versions,
NeilBrown80212d52006-10-02 02:17:47 -070083 [NFSD_Ports] = write_ports,
NeilBrown596bbe52006-10-04 02:15:48 -070084 [NFSD_MaxBlkSize] = write_maxblksize,
Jeff Layton5b8db002014-07-02 16:11:22 -040085 [NFSD_MaxConnections] = write_maxconn,
NeilBrown70c3b762005-11-07 01:00:25 -080086#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 [NFSD_Leasetime] = write_leasetime,
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -050088 [NFSD_Gracetime] = write_gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070089 [NFSD_RecoveryDir] = write_recoverydir,
Jeff Layton7f5ef2e2014-09-12 16:40:21 -040090 [NFSD_V4EndGrace] = write_v4_end_grace,
NeilBrown70c3b762005-11-07 01:00:25 -080091#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070092};
93
94static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
95{
Al Viro496ad9a2013-01-23 17:07:38 -050096 ino_t ino = file_inode(file)->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 char *data;
98 ssize_t rv;
99
Tobias Klausere8c96f82006-03-24 03:15:34 -0800100 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 return -EINVAL;
102
103 data = simple_transaction_get(file, buf, size);
104 if (IS_ERR(data))
105 return PTR_ERR(data);
106
107 rv = write_op[ino](file, data, size);
NeilBrown8971a102007-02-14 00:33:11 -0800108 if (rv >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 simple_transaction_set(file, rv);
110 rv = size;
111 }
112 return rv;
113}
114
NeilBrown73900222005-11-07 01:00:24 -0800115static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
116{
117 if (! file->private_data) {
118 /* An attempt to read a transaction file without writing
119 * causes a 0-byte write so that the file can return
120 * state information
121 */
122 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
123 if (rv < 0)
124 return rv;
125 }
126 return simple_transaction_read(file, buf, size, pos);
127}
128
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800129static const struct file_operations transaction_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 .write = nfsctl_transaction_write,
NeilBrown73900222005-11-07 01:00:24 -0800131 .read = nfsctl_transaction_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 .release = simple_transaction_release,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200133 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134};
135
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +0300136static int exports_net_open(struct net *net, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400138 int err;
139 struct seq_file *seq;
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +0300140 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400141
142 err = seq_open(file, &nfs_exports_op);
143 if (err)
144 return err;
145
146 seq = file->private_data;
Stanislav Kinsburskye5f06f72012-04-11 15:13:28 +0400147 seq->private = nn->svc_export_cache;
Stanislav Kinsburskyf2c7ea12012-03-28 19:09:29 +0400148 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149}
150
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +0300151static int exports_proc_open(struct inode *inode, struct file *file)
152{
153 return exports_net_open(current->nsproxy->net_ns, file);
154}
155
156static const struct file_operations exports_proc_operations = {
157 .open = exports_proc_open,
158 .read = seq_read,
159 .llseek = seq_lseek,
160 .release = seq_release,
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +0300161};
162
163static int exports_nfsd_open(struct inode *inode, struct file *file)
164{
165 return exports_net_open(inode->i_sb->s_fs_info, file);
166}
167
168static const struct file_operations exports_nfsd_operations = {
169 .open = exports_nfsd_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 .read = seq_read,
171 .llseek = seq_lseek,
172 .release = seq_release,
173};
174
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500175static int export_features_show(struct seq_file *m, void *v)
176{
177 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
178 return 0;
179}
180
181static int export_features_open(struct inode *inode, struct file *file)
182{
183 return single_open(file, export_features_show, NULL);
184}
185
Al Viro75ef9de2013-04-04 19:09:41 -0400186static const struct file_operations export_features_operations = {
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500187 .open = export_features_open,
188 .read = seq_read,
189 .llseek = seq_lseek,
190 .release = single_release,
191};
192
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400193#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500194static int supported_enctypes_show(struct seq_file *m, void *v)
195{
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400196 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500197 return 0;
198}
199
200static int supported_enctypes_open(struct inode *inode, struct file *file)
201{
202 return single_open(file, supported_enctypes_show, NULL);
203}
204
Al Viro75ef9de2013-04-04 19:09:41 -0400205static const struct file_operations supported_enctypes_ops = {
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500206 .open = supported_enctypes_open,
207 .read = seq_read,
208 .llseek = seq_lseek,
209 .release = single_release,
210};
J. Bruce Fieldsb084f592011-05-31 12:24:58 -0400211#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500212
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700213static const struct file_operations pool_stats_operations = {
Greg Banks03cf6c92009-01-13 21:26:36 +1100214 .open = nfsd_pool_stats_open,
215 .read = seq_read,
216 .llseek = seq_lseek,
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900217 .release = nfsd_pool_stats_release,
Greg Banks03cf6c92009-01-13 21:26:36 +1100218};
219
Jeff Laytona2f999a2013-03-27 10:15:38 -0400220static struct file_operations reply_cache_stats_operations = {
221 .open = nfsd_reply_cache_stats_open,
222 .read = seq_read,
223 .llseek = seq_lseek,
224 .release = single_release,
225};
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227/*----------------------------------------------------------------------------*/
228/*
229 * payload - write methods
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 */
231
Al Viro244c7d42014-10-21 20:19:11 -0400232static inline struct net *netns(struct file *file)
233{
234 return file_inode(file)->i_sb->s_fs_info;
235}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Chuck Lever262a0982008-12-12 16:57:35 -0500237/**
238 * write_unlock_ip - Release all locks used by a client
239 *
240 * Experimental.
241 *
242 * Input:
243 * buf: '\n'-terminated C string containing a
Chuck Lever41160922009-08-09 15:09:40 -0400244 * presentation format IP address
Chuck Lever262a0982008-12-12 16:57:35 -0500245 * size: length of C string in @buf
246 * Output:
247 * On success: returns zero if all specified locks were released;
248 * returns one if one or more locks were not released
249 * On error: return code is negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500250 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500251static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500252{
Chuck Lever41160922009-08-09 15:09:40 -0400253 struct sockaddr_storage address;
254 struct sockaddr *sap = (struct sockaddr *)&address;
255 size_t salen = sizeof(address);
Chuck Lever367c8c72008-06-30 18:58:14 -0400256 char *fo_path;
Al Viro244c7d42014-10-21 20:19:11 -0400257 struct net *net = netns(file);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500258
259 /* sanity check */
260 if (size == 0)
261 return -EINVAL;
262
263 if (buf[size-1] != '\n')
264 return -EINVAL;
265
266 fo_path = buf;
267 if (qword_get(&buf, fo_path, size) < 0)
268 return -EINVAL;
269
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +0300270 if (rpc_pton(net, fo_path, size, sap, salen) == 0)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500271 return -EINVAL;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500272
Chuck Lever41160922009-08-09 15:09:40 -0400273 return nlmsvc_unlock_all_by_ip(sap);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500274}
275
Chuck Lever262a0982008-12-12 16:57:35 -0500276/**
277 * write_unlock_fs - Release all locks on a local file system
278 *
279 * Experimental.
280 *
281 * Input:
282 * buf: '\n'-terminated C string containing the
283 * absolute pathname of a local file system
284 * size: length of C string in @buf
285 * Output:
286 * On success: returns zero if all specified locks were released;
287 * returns one if one or more locks were not released
288 * On error: return code is negative errno value
289 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500290static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
Wendy Cheng17efa372008-01-17 11:10:12 -0500291{
Al Viroa63bb992008-08-02 01:03:36 -0400292 struct path path;
Wendy Cheng17efa372008-01-17 11:10:12 -0500293 char *fo_path;
294 int error;
295
296 /* sanity check */
297 if (size == 0)
298 return -EINVAL;
299
300 if (buf[size-1] != '\n')
301 return -EINVAL;
302
303 fo_path = buf;
304 if (qword_get(&buf, fo_path, size) < 0)
305 return -EINVAL;
306
Al Viroa63bb992008-08-02 01:03:36 -0400307 error = kern_path(fo_path, 0, &path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500308 if (error)
309 return error;
310
Chuck Lever262a0982008-12-12 16:57:35 -0500311 /*
312 * XXX: Needs better sanity checking. Otherwise we could end up
313 * releasing locks on the wrong file system.
314 *
315 * For example:
316 * 1. Does the path refer to a directory?
317 * 2. Is that directory a mount point, or
318 * 3. Is that directory the root of an exported file system?
319 */
Al Virod8c95842011-12-07 18:16:57 -0500320 error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb);
Wendy Cheng17efa372008-01-17 11:10:12 -0500321
Al Viroa63bb992008-08-02 01:03:36 -0400322 path_put(&path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500323 return error;
324}
325
Chuck Lever262a0982008-12-12 16:57:35 -0500326/**
327 * write_filehandle - Get a variable-length NFS file handle by path
328 *
329 * On input, the buffer contains a '\n'-terminated C string comprised of
330 * three alphanumeric words separated by whitespace. The string may
331 * contain escape sequences.
332 *
333 * Input:
334 * buf:
335 * domain: client domain name
336 * path: export pathname
337 * maxsize: numeric maximum size of
338 * @buf
339 * size: length of C string in @buf
340 * Output:
341 * On success: passed-in buffer filled with '\n'-terminated C
342 * string containing a ASCII hex text version
343 * of the NFS file handle;
344 * return code is the size in bytes of the string
345 * On error: return code is negative errno value
346 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
348{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700350 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 char *mesg = buf;
352 int len;
353 struct auth_domain *dom;
354 struct knfsd_fh fh;
355
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500356 if (size == 0)
357 return -EINVAL;
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 if (buf[size-1] != '\n')
360 return -EINVAL;
361 buf[size-1] = 0;
362
363 dname = mesg;
364 len = qword_get(&mesg, dname, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500365 if (len <= 0)
366 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368 path = dname+len+1;
369 len = qword_get(&mesg, path, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500370 if (len <= 0)
371 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373 len = get_int(&mesg, &maxsize);
374 if (len)
375 return len;
376
377 if (maxsize < NFS_FHSIZE)
378 return -EINVAL;
Kinglong Mee3c7aa152014-06-10 18:08:19 +0800379 maxsize = min(maxsize, NFS3_FHSIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 if (qword_get(&mesg, mesg, size)>0)
382 return -EINVAL;
383
384 /* we have all the words, they are in buf.. */
385 dom = unix_domain_find(dname);
386 if (!dom)
387 return -ENOMEM;
388
Al Viro244c7d42014-10-21 20:19:11 -0400389 len = exp_rootfh(netns(file), dom, path, &fh, maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 auth_domain_put(dom);
391 if (len)
392 return len;
393
Chuck Lever54224f02008-12-12 16:57:20 -0500394 mesg = buf;
395 len = SIMPLE_TRANSACTION_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
397 mesg[-1] = '\n';
398 return mesg - buf;
399}
400
Chuck Lever262a0982008-12-12 16:57:35 -0500401/**
402 * write_threads - Start NFSD, or report the current number of running threads
403 *
404 * Input:
405 * buf: ignored
406 * size: zero
407 * Output:
408 * On success: passed-in buffer filled with '\n'-terminated C
409 * string numeric value representing the number of
410 * running NFSD threads;
411 * return code is the size in bytes of the string
412 * On error: return code is zero
413 *
414 * OR
415 *
416 * Input:
417 * buf: C string containing an unsigned
418 * integer value representing the
419 * number of NFSD threads to start
420 * size: non-zero length of C string in @buf
421 * Output:
422 * On success: NFS service is started;
423 * passed-in buffer filled with '\n'-terminated C
424 * string numeric value representing the number of
425 * running NFSD threads;
426 * return code is the size in bytes of the string
427 * On error: return code is zero or a negative errno value
428 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429static ssize_t write_threads(struct file *file, char *buf, size_t size)
430{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 char *mesg = buf;
432 int rv;
Al Viro244c7d42014-10-21 20:19:11 -0400433 struct net *net = netns(file);
Stanislav Kinsburskyd41a9412012-12-10 12:19:25 +0300434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 if (size > 0) {
436 int newthreads;
437 rv = get_int(&mesg, &newthreads);
438 if (rv)
439 return rv;
Chuck Lever9e074852008-12-12 16:57:27 -0500440 if (newthreads < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 return -EINVAL;
Stanislav Kinsburskyd41a9412012-12-10 12:19:25 +0300442 rv = nfsd_svc(newthreads, net);
NeilBrown82e12fe2009-06-16 11:03:07 +1000443 if (rv < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 return rv;
NeilBrown82e12fe2009-06-16 11:03:07 +1000445 } else
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300446 rv = nfsd_nrthreads(net);
Chuck Levere06b6402009-04-23 19:33:25 -0400447
NeilBrown82e12fe2009-06-16 11:03:07 +1000448 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449}
450
Chuck Lever262a0982008-12-12 16:57:35 -0500451/**
452 * write_pool_threads - Set or report the current number of threads per pool
453 *
454 * Input:
455 * buf: ignored
456 * size: zero
457 *
458 * OR
459 *
460 * Input:
461 * buf: C string containing whitespace-
462 * separated unsigned integer values
463 * representing the number of NFSD
464 * threads to start in each pool
465 * size: non-zero length of C string in @buf
466 * Output:
467 * On success: passed-in buffer filled with '\n'-terminated C
468 * string containing integer values representing the
469 * number of NFSD threads in each pool;
470 * return code is the size in bytes of the string
471 * On error: return code is zero or a negative errno value
472 */
Greg Bankseed29652006-10-02 02:18:02 -0700473static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
474{
475 /* if size > 0, look for an array of number of threads per node
476 * and apply them then write out number of threads per node as reply
477 */
478 char *mesg = buf;
479 int i;
480 int rv;
481 int len;
Neil Brownbedbdd82008-06-10 08:40:35 -0400482 int npools;
Greg Bankseed29652006-10-02 02:18:02 -0700483 int *nthreads;
Al Viro244c7d42014-10-21 20:19:11 -0400484 struct net *net = netns(file);
Greg Bankseed29652006-10-02 02:18:02 -0700485
Neil Brownbedbdd82008-06-10 08:40:35 -0400486 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300487 npools = nfsd_nrpools(net);
Greg Bankseed29652006-10-02 02:18:02 -0700488 if (npools == 0) {
489 /*
490 * NFS is shut down. The admin can start it by
491 * writing to the threads file but NOT the pool_threads
492 * file, sorry. Report zero threads.
493 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400494 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700495 strcpy(buf, "0\n");
496 return strlen(buf);
497 }
498
499 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
Neil Brownbedbdd82008-06-10 08:40:35 -0400500 rv = -ENOMEM;
Greg Bankseed29652006-10-02 02:18:02 -0700501 if (nthreads == NULL)
Neil Brownbedbdd82008-06-10 08:40:35 -0400502 goto out_free;
Greg Bankseed29652006-10-02 02:18:02 -0700503
504 if (size > 0) {
505 for (i = 0; i < npools; i++) {
506 rv = get_int(&mesg, &nthreads[i]);
507 if (rv == -ENOENT)
508 break; /* fewer numbers than pools */
509 if (rv)
510 goto out_free; /* syntax error */
511 rv = -EINVAL;
512 if (nthreads[i] < 0)
513 goto out_free;
514 }
Stanislav Kinsbursky3938a0d2012-12-10 12:19:30 +0300515 rv = nfsd_set_nrthreads(i, nthreads, net);
Greg Bankseed29652006-10-02 02:18:02 -0700516 if (rv)
517 goto out_free;
518 }
519
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300520 rv = nfsd_get_nrthreads(npools, nthreads, net);
Greg Bankseed29652006-10-02 02:18:02 -0700521 if (rv)
522 goto out_free;
523
524 mesg = buf;
525 size = SIMPLE_TRANSACTION_LIMIT;
526 for (i = 0; i < npools && size > 0; i++) {
527 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
528 len = strlen(mesg);
529 size -= len;
530 mesg += len;
531 }
J. Bruce Fields413d63d7102009-07-28 11:37:25 -0400532 rv = mesg - buf;
Greg Bankseed29652006-10-02 02:18:02 -0700533out_free:
534 kfree(nthreads);
Neil Brownbedbdd82008-06-10 08:40:35 -0400535 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700536 return rv;
537}
538
Jeff Layton3dd98a32008-06-10 08:40:36 -0400539static ssize_t __write_versions(struct file *file, char *buf, size_t size)
NeilBrown70c3b762005-11-07 01:00:25 -0800540{
NeilBrown70c3b762005-11-07 01:00:25 -0800541 char *mesg = buf;
Benny Halevy8daf2202009-04-03 08:28:59 +0300542 char *vers, *minorp, sign;
Chuck Lever261758b2009-04-23 19:33:18 -0400543 int len, num, remaining;
Benny Halevy8daf2202009-04-03 08:28:59 +0300544 unsigned minor;
NeilBrown70c3b762005-11-07 01:00:25 -0800545 ssize_t tlen = 0;
546 char *sep;
Al Viro244c7d42014-10-21 20:19:11 -0400547 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
NeilBrown70c3b762005-11-07 01:00:25 -0800548
549 if (size>0) {
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300550 if (nn->nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700551 /* Cannot change versions without updating
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300552 * nn->nfsd_serv->sv_xdrsize, and reallocing
NeilBrown6658d3a2006-10-02 02:17:46 -0700553 * rq_argp and rq_resp
554 */
NeilBrown70c3b762005-11-07 01:00:25 -0800555 return -EBUSY;
556 if (buf[size-1] != '\n')
557 return -EINVAL;
558 buf[size-1] = 0;
559
560 vers = mesg;
561 len = qword_get(&mesg, vers, size);
562 if (len <= 0) return -EINVAL;
563 do {
564 sign = *vers;
565 if (sign == '+' || sign == '-')
Benny Halevy8daf2202009-04-03 08:28:59 +0300566 num = simple_strtol((vers+1), &minorp, 0);
NeilBrown70c3b762005-11-07 01:00:25 -0800567 else
Benny Halevy8daf2202009-04-03 08:28:59 +0300568 num = simple_strtol(vers, &minorp, 0);
569 if (*minorp == '.') {
J. Bruce Fieldsff89be82013-01-23 18:25:01 -0500570 if (num != 4)
Benny Halevy8daf2202009-04-03 08:28:59 +0300571 return -EINVAL;
572 minor = simple_strtoul(minorp+1, NULL, 0);
573 if (minor == 0)
574 return -EINVAL;
575 if (nfsd_minorversion(minor, sign == '-' ?
576 NFSD_CLEAR : NFSD_SET) < 0)
577 return -EINVAL;
578 goto next;
579 }
NeilBrown70c3b762005-11-07 01:00:25 -0800580 switch(num) {
581 case 2:
582 case 3:
583 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700584 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800585 break;
586 default:
587 return -EINVAL;
588 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300589 next:
NeilBrown70c3b762005-11-07 01:00:25 -0800590 vers += len + 1;
NeilBrown70c3b762005-11-07 01:00:25 -0800591 } while ((len = qword_get(&mesg, vers, size)) > 0);
592 /* If all get turned off, turn them back on, as
593 * having no versions is BAD
594 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700595 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800596 }
Chuck Lever261758b2009-04-23 19:33:18 -0400597
NeilBrown70c3b762005-11-07 01:00:25 -0800598 /* Now write current state into reply buffer */
599 len = 0;
600 sep = "";
Chuck Lever261758b2009-04-23 19:33:18 -0400601 remaining = SIMPLE_TRANSACTION_LIMIT;
NeilBrown70c3b762005-11-07 01:00:25 -0800602 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700603 if (nfsd_vers(num, NFSD_AVAIL)) {
Chuck Lever261758b2009-04-23 19:33:18 -0400604 len = snprintf(buf, remaining, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700605 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800606 num);
607 sep = " ";
Chuck Lever261758b2009-04-23 19:33:18 -0400608
Dan Carpenter818f2f52014-11-27 18:58:54 +0300609 if (len >= remaining)
Chuck Lever261758b2009-04-23 19:33:18 -0400610 break;
611 remaining -= len;
612 buf += len;
613 tlen += len;
NeilBrown70c3b762005-11-07 01:00:25 -0800614 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300615 if (nfsd_vers(4, NFSD_AVAIL))
Chuck Lever261758b2009-04-23 19:33:18 -0400616 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
617 minor++) {
618 len = snprintf(buf, remaining, " %c4.%u",
Benny Halevy8daf2202009-04-03 08:28:59 +0300619 (nfsd_vers(4, NFSD_TEST) &&
620 nfsd_minorversion(minor, NFSD_TEST)) ?
621 '+' : '-',
622 minor);
Chuck Lever261758b2009-04-23 19:33:18 -0400623
Dan Carpenter818f2f52014-11-27 18:58:54 +0300624 if (len >= remaining)
Chuck Lever261758b2009-04-23 19:33:18 -0400625 break;
626 remaining -= len;
627 buf += len;
628 tlen += len;
629 }
630
631 len = snprintf(buf, remaining, "\n");
Dan Carpenter818f2f52014-11-27 18:58:54 +0300632 if (len >= remaining)
Chuck Lever261758b2009-04-23 19:33:18 -0400633 return -EINVAL;
634 return tlen + len;
NeilBrown70c3b762005-11-07 01:00:25 -0800635}
636
Chuck Lever262a0982008-12-12 16:57:35 -0500637/**
638 * write_versions - Set or report the available NFS protocol versions
639 *
640 * Input:
641 * buf: ignored
642 * size: zero
643 * Output:
644 * On success: passed-in buffer filled with '\n'-terminated C
645 * string containing positive or negative integer
646 * values representing the current status of each
647 * protocol version;
648 * return code is the size in bytes of the string
649 * On error: return code is zero or a negative errno value
650 *
651 * OR
652 *
653 * Input:
654 * buf: C string containing whitespace-
655 * separated positive or negative
656 * integer values representing NFS
657 * protocol versions to enable ("+n")
658 * or disable ("-n")
659 * size: non-zero length of C string in @buf
660 * Output:
661 * On success: status of zero or more protocol versions has
662 * been updated; passed-in buffer filled with
663 * '\n'-terminated C string containing positive
664 * or negative integer values representing the
665 * current status of each protocol version;
666 * return code is the size in bytes of the string
667 * On error: return code is zero or a negative errno value
668 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400669static ssize_t write_versions(struct file *file, char *buf, size_t size)
670{
671 ssize_t rv;
672
673 mutex_lock(&nfsd_mutex);
674 rv = __write_versions(file, buf, size);
675 mutex_unlock(&nfsd_mutex);
676 return rv;
677}
678
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400679/*
Chuck Lever0a5372d2009-04-23 19:32:10 -0400680 * Zero-length write. Return a list of NFSD's current listener
681 * transports.
682 */
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300683static ssize_t __write_ports_names(char *buf, struct net *net)
Chuck Lever0a5372d2009-04-23 19:32:10 -0400684{
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300685 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
686
687 if (nn->nfsd_serv == NULL)
Chuck Lever0a5372d2009-04-23 19:32:10 -0400688 return 0;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300689 return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Lever0a5372d2009-04-23 19:32:10 -0400690}
691
692/*
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400693 * A single 'fd' number was written, in which case it must be for
694 * a socket of a supported family/protocol, and we use it as an
695 * nfsd listener.
696 */
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300697static ssize_t __write_ports_addfd(char *buf, struct net *net)
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400698{
699 char *mesg = buf;
700 int fd, err;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300701 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400702
703 err = get_int(&mesg, &fd);
704 if (err != 0 || fd < 0)
705 return -EINVAL;
706
Stanislav Kinsbursky30646392014-02-26 16:50:01 +0300707 if (svc_alien_sock(net, fd)) {
708 printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__);
709 return -EINVAL;
710 }
711
Stanislav Kinsbursky67774362012-12-10 12:19:20 +0300712 err = nfsd_create_serv(net);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400713 if (err != 0)
714 return err;
715
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300716 err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400717 if (err < 0) {
Stanislav Kinsbursky19f7e2c2012-07-03 16:46:41 +0400718 nfsd_destroy(net);
Jeff Layton78a8d7c2010-07-19 16:50:05 -0400719 return err;
720 }
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400721
Chuck Leverea068ba2009-04-23 19:32:18 -0400722 /* Decrease the count, but don't shut down the service */
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300723 nn->nfsd_serv->sv_nrthreads--;
Chuck Leverea068ba2009-04-23 19:32:18 -0400724 return err;
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400725}
726
727/*
Chuck Lever4eb68c22009-04-23 19:31:40 -0400728 * A transport listener is added by writing it's transport name and
729 * a port number.
730 */
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300731static ssize_t __write_ports_addxprt(char *buf, struct net *net)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400732{
733 char transport[16];
Chuck Lever37498292010-01-26 14:04:22 -0500734 struct svc_xprt *xprt;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400735 int port, err;
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300736 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Chuck Lever4eb68c22009-04-23 19:31:40 -0400737
J. Bruce Fieldsa10fded2012-08-14 17:48:39 -0400738 if (sscanf(buf, "%15s %5u", transport, &port) != 2)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400739 return -EINVAL;
740
Alexey Dobriyan4be929b2010-05-24 14:33:03 -0700741 if (port < 1 || port > USHRT_MAX)
Chuck Lever4eb68c22009-04-23 19:31:40 -0400742 return -EINVAL;
743
Stanislav Kinsbursky67774362012-12-10 12:19:20 +0300744 err = nfsd_create_serv(net);
Chuck Lever4eb68c22009-04-23 19:31:40 -0400745 if (err != 0)
746 return err;
747
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300748 err = svc_create_xprt(nn->nfsd_serv, transport, net,
Chuck Lever4eb68c22009-04-23 19:31:40 -0400749 PF_INET, port, SVC_SOCK_ANONYMOUS);
Chuck Lever68717902010-01-26 14:04:13 -0500750 if (err < 0)
Chuck Lever37498292010-01-26 14:04:22 -0500751 goto out_err;
752
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300753 err = svc_create_xprt(nn->nfsd_serv, transport, net,
Chuck Lever37498292010-01-26 14:04:22 -0500754 PF_INET6, port, SVC_SOCK_ANONYMOUS);
755 if (err < 0 && err != -EAFNOSUPPORT)
756 goto out_close;
Jeff Layton0cd14a02010-07-19 16:50:06 -0400757
758 /* Decrease the count, but don't shut down the service */
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300759 nn->nfsd_serv->sv_nrthreads--;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400760 return 0;
Chuck Lever37498292010-01-26 14:04:22 -0500761out_close:
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300762 xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port);
Chuck Lever37498292010-01-26 14:04:22 -0500763 if (xprt != NULL) {
764 svc_close_xprt(xprt);
765 svc_xprt_put(xprt);
766 }
767out_err:
Stanislav Kinsbursky19f7e2c2012-07-03 16:46:41 +0400768 nfsd_destroy(net);
Chuck Lever37498292010-01-26 14:04:22 -0500769 return err;
Chuck Lever4eb68c22009-04-23 19:31:40 -0400770}
771
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300772static ssize_t __write_ports(struct file *file, char *buf, size_t size,
773 struct net *net)
NeilBrown80212d52006-10-02 02:17:47 -0700774{
Chuck Lever0a5372d2009-04-23 19:32:10 -0400775 if (size == 0)
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300776 return __write_ports_names(buf, net);
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400777
778 if (isdigit(buf[0]))
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300779 return __write_ports_addfd(buf, net);
Chuck Lever82d56592009-04-23 19:31:48 -0400780
Chuck Lever4eb68c22009-04-23 19:31:40 -0400781 if (isalpha(buf[0]))
Stanislav Kinsbursky08160352012-12-10 12:19:35 +0300782 return __write_ports_addxprt(buf, net);
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400783
NeilBrownb41b66d2006-10-02 02:17:48 -0700784 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -0700785}
786
Chuck Lever262a0982008-12-12 16:57:35 -0500787/**
788 * write_ports - Pass a socket file descriptor or transport name to listen on
789 *
790 * Input:
791 * buf: ignored
792 * size: zero
793 * Output:
794 * On success: passed-in buffer filled with a '\n'-terminated C
795 * string containing a whitespace-separated list of
796 * named NFSD listeners;
797 * return code is the size in bytes of the string
798 * On error: return code is zero or a negative errno value
799 *
800 * OR
801 *
802 * Input:
803 * buf: C string containing an unsigned
804 * integer value representing a bound
805 * but unconnected socket that is to be
Chuck Leverc71206a2009-04-23 19:32:03 -0400806 * used as an NFSD listener; listen(3)
807 * must be called for a SOCK_STREAM
808 * socket, otherwise it is ignored
Chuck Lever262a0982008-12-12 16:57:35 -0500809 * size: non-zero length of C string in @buf
810 * Output:
811 * On success: NFS service is started;
812 * passed-in buffer filled with a '\n'-terminated C
813 * string containing a unique alphanumeric name of
814 * the listener;
815 * return code is the size in bytes of the string
816 * On error: return code is a negative errno value
817 *
818 * OR
819 *
820 * Input:
Chuck Lever262a0982008-12-12 16:57:35 -0500821 * buf: C string containing a transport
822 * name and an unsigned integer value
823 * representing the port to listen on,
824 * separated by whitespace
825 * size: non-zero length of C string in @buf
826 * Output:
827 * On success: returns zero; NFS service is started
828 * On error: return code is a negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500829 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400830static ssize_t write_ports(struct file *file, char *buf, size_t size)
831{
832 ssize_t rv;
Jeff Layton3dd98a32008-06-10 08:40:36 -0400833
Neil Brownbedbdd82008-06-10 08:40:35 -0400834 mutex_lock(&nfsd_mutex);
Al Viro244c7d42014-10-21 20:19:11 -0400835 rv = __write_ports(file, buf, size, netns(file));
Neil Brownbedbdd82008-06-10 08:40:35 -0400836 mutex_unlock(&nfsd_mutex);
837 return rv;
838}
839
840
NeilBrown596bbe52006-10-04 02:15:48 -0700841int nfsd_max_blksize;
842
Chuck Lever262a0982008-12-12 16:57:35 -0500843/**
844 * write_maxblksize - Set or report the current NFS blksize
845 *
846 * Input:
847 * buf: ignored
848 * size: zero
849 *
850 * OR
851 *
852 * Input:
853 * buf: C string containing an unsigned
854 * integer value representing the new
855 * NFS blksize
856 * size: non-zero length of C string in @buf
857 * Output:
858 * On success: passed-in buffer filled with '\n'-terminated C string
859 * containing numeric value of the current NFS blksize
860 * setting;
861 * return code is the size in bytes of the string
862 * On error: return code is zero or a negative errno value
863 */
NeilBrown596bbe52006-10-04 02:15:48 -0700864static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
865{
866 char *mesg = buf;
Al Viro244c7d42014-10-21 20:19:11 -0400867 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300868
NeilBrown596bbe52006-10-04 02:15:48 -0700869 if (size > 0) {
870 int bsize;
871 int rv = get_int(&mesg, &bsize);
872 if (rv)
873 return rv;
874 /* force bsize into allowed range and
875 * required alignment.
876 */
Kinglong Mee3c7aa152014-06-10 18:08:19 +0800877 bsize = max_t(int, bsize, 1024);
878 bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE);
NeilBrown596bbe52006-10-04 02:15:48 -0700879 bsize &= ~(1024-1);
Neil Brownbedbdd82008-06-10 08:40:35 -0400880 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300881 if (nn->nfsd_serv) {
Neil Brownbedbdd82008-06-10 08:40:35 -0400882 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700883 return -EBUSY;
884 }
885 nfsd_max_blksize = bsize;
Neil Brownbedbdd82008-06-10 08:40:35 -0400886 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -0700887 }
Chuck Levere06b6402009-04-23 19:33:25 -0400888
889 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
890 nfsd_max_blksize);
NeilBrown596bbe52006-10-04 02:15:48 -0700891}
892
Jeff Layton5b8db002014-07-02 16:11:22 -0400893/**
894 * write_maxconn - Set or report the current max number of connections
895 *
896 * Input:
897 * buf: ignored
898 * size: zero
899 * OR
900 *
901 * Input:
902 * buf: C string containing an unsigned
903 * integer value representing the new
904 * number of max connections
905 * size: non-zero length of C string in @buf
906 * Output:
907 * On success: passed-in buffer filled with '\n'-terminated C string
908 * containing numeric value of max_connections setting
909 * for this net namespace;
910 * return code is the size in bytes of the string
911 * On error: return code is zero or a negative errno value
912 */
913static ssize_t write_maxconn(struct file *file, char *buf, size_t size)
914{
915 char *mesg = buf;
Al Viro244c7d42014-10-21 20:19:11 -0400916 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
Jeff Layton5b8db002014-07-02 16:11:22 -0400917 unsigned int maxconn = nn->max_connections;
918
919 if (size > 0) {
920 int rv = get_uint(&mesg, &maxconn);
921
922 if (rv)
923 return rv;
924 nn->max_connections = maxconn;
925 }
926
927 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn);
928}
929
NeilBrown70c3b762005-11-07 01:00:25 -0800930#ifdef CONFIG_NFSD_V4
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300931static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size,
932 time_t *time, struct nfsd_net *nn)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 char *mesg = buf;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500935 int rv, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
937 if (size > 0) {
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300938 if (nn->nfsd_serv)
Jeff Layton3dd98a32008-06-10 08:40:36 -0400939 return -EBUSY;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500940 rv = get_int(&mesg, &i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 if (rv)
942 return rv;
J. Bruce Fieldse7b184f2010-03-02 11:18:40 -0500943 /*
944 * Some sanity checking. We don't have a reason for
945 * these particular numbers, but problems with the
946 * extremes are:
947 * - Too short: the briefest network outage may
948 * cause clients to lose all their locks. Also,
949 * the frequent polling may be wasteful.
950 * - Too long: do you really want reboot recovery
951 * to take more than an hour? Or to make other
952 * clients wait an hour before being able to
953 * revoke a dead client's locks?
954 */
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500955 if (i < 10 || i > 3600)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 return -EINVAL;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500957 *time = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 }
Chuck Levere06b6402009-04-23 19:33:25 -0400959
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500960 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
961}
962
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300963static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size,
964 time_t *time, struct nfsd_net *nn)
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500965{
966 ssize_t rv;
967
968 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300969 rv = __nfsd4_write_time(file, buf, size, time, nn);
J. Bruce Fieldsf0135742010-03-01 19:32:36 -0500970 mutex_unlock(&nfsd_mutex);
971 return rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972}
973
Chuck Lever262a0982008-12-12 16:57:35 -0500974/**
975 * write_leasetime - Set or report the current NFSv4 lease time
976 *
977 * Input:
978 * buf: ignored
979 * size: zero
980 *
981 * OR
982 *
983 * Input:
984 * buf: C string containing an unsigned
985 * integer value representing the new
986 * NFSv4 lease expiry time
987 * size: non-zero length of C string in @buf
988 * Output:
989 * On success: passed-in buffer filled with '\n'-terminated C
990 * string containing unsigned integer value of the
991 * current lease expiry time;
992 * return code is the size in bytes of the string
993 * On error: return code is zero or a negative errno value
994 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400995static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
996{
Al Viro244c7d42014-10-21 20:19:11 -0400997 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +0300998 return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn);
Jeff Layton3dd98a32008-06-10 08:40:36 -0400999}
1000
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -05001001/**
1002 * write_gracetime - Set or report current NFSv4 grace period time
1003 *
1004 * As above, but sets the time of the NFSv4 grace period.
1005 *
1006 * Note this should never be set to less than the *previous*
1007 * lease-period time, but we don't try to enforce this. (In the common
1008 * case (a new boot), we don't know what the previous lease time was
1009 * anyway.)
1010 */
1011static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
1012{
Al Viro244c7d42014-10-21 20:19:11 -04001013 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +03001014 return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn);
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -05001015}
1016
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +03001017static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size,
1018 struct nfsd_net *nn)
NeilBrown0964a3d2005-06-23 22:04:32 -07001019{
1020 char *mesg = buf;
1021 char *recdir;
1022 int len, status;
1023
Jeff Layton3dd98a32008-06-10 08:40:36 -04001024 if (size > 0) {
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +03001025 if (nn->nfsd_serv)
Jeff Layton3dd98a32008-06-10 08:40:36 -04001026 return -EBUSY;
1027 if (size > PATH_MAX || buf[size-1] != '\n')
1028 return -EINVAL;
1029 buf[size-1] = 0;
NeilBrown0964a3d2005-06-23 22:04:32 -07001030
Jeff Layton3dd98a32008-06-10 08:40:36 -04001031 recdir = mesg;
1032 len = qword_get(&mesg, recdir, size);
1033 if (len <= 0)
1034 return -EINVAL;
NeilBrown0964a3d2005-06-23 22:04:32 -07001035
Jeff Layton3dd98a32008-06-10 08:40:36 -04001036 status = nfs4_reset_recoverydir(recdir);
Andi Kleen69049962010-07-20 15:24:27 -07001037 if (status)
1038 return status;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001039 }
Chuck Lever3d72ab82009-04-23 19:33:10 -04001040
1041 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1042 nfs4_recoverydir());
NeilBrown0964a3d2005-06-23 22:04:32 -07001043}
Jeff Layton3dd98a32008-06-10 08:40:36 -04001044
Chuck Lever262a0982008-12-12 16:57:35 -05001045/**
1046 * write_recoverydir - Set or report the pathname of the recovery directory
1047 *
1048 * Input:
1049 * buf: ignored
1050 * size: zero
1051 *
1052 * OR
1053 *
1054 * Input:
1055 * buf: C string containing the pathname
1056 * of the directory on a local file
1057 * system containing permanent NFSv4
1058 * recovery data
1059 * size: non-zero length of C string in @buf
1060 * Output:
1061 * On success: passed-in buffer filled with '\n'-terminated C string
1062 * containing the current recovery pathname setting;
1063 * return code is the size in bytes of the string
1064 * On error: return code is zero or a negative errno value
1065 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001066static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1067{
1068 ssize_t rv;
Al Viro244c7d42014-10-21 20:19:11 -04001069 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
Jeff Layton3dd98a32008-06-10 08:40:36 -04001070
1071 mutex_lock(&nfsd_mutex);
Stanislav Kinsbursky9dd98452012-12-06 14:23:24 +03001072 rv = __write_recoverydir(file, buf, size, nn);
Jeff Layton3dd98a32008-06-10 08:40:36 -04001073 mutex_unlock(&nfsd_mutex);
1074 return rv;
1075}
1076
Jeff Layton7f5ef2e2014-09-12 16:40:21 -04001077/**
1078 * write_v4_end_grace - release grace period for nfsd's v4.x lock manager
1079 *
1080 * Input:
1081 * buf: ignored
1082 * size: zero
1083 * OR
1084 *
1085 * Input:
1086 * buf: any value
1087 * size: non-zero length of C string in @buf
1088 * Output:
1089 * passed-in buffer filled with "Y" or "N" with a newline
1090 * and NULL-terminated C string. This indicates whether
1091 * the grace period has ended in the current net
1092 * namespace. Return code is the size in bytes of the
1093 * string. Writing a string that starts with 'Y', 'y', or
1094 * '1' to the file will end the grace period for nfsd's v4
1095 * lock manager.
1096 */
1097static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size)
1098{
Al Viro244c7d42014-10-21 20:19:11 -04001099 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id);
Jeff Layton7f5ef2e2014-09-12 16:40:21 -04001100
1101 if (size > 0) {
1102 switch(buf[0]) {
1103 case 'Y':
1104 case 'y':
1105 case '1':
1106 nfsd4_end_grace(nn);
1107 break;
1108 default:
1109 return -EINVAL;
1110 }
1111 }
1112
1113 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n",
1114 nn->grace_ended ? 'Y' : 'N');
1115}
1116
NeilBrown70c3b762005-11-07 01:00:25 -08001117#endif
NeilBrown0964a3d2005-06-23 22:04:32 -07001118
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119/*----------------------------------------------------------------------------*/
1120/*
1121 * populating the filesystem.
1122 */
1123
1124static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1125{
1126 static struct tree_descr nfsd_files[] = {
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +03001127 [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO},
J. Bruce Fieldse8e87532009-12-14 12:53:32 -05001128 [NFSD_Export_features] = {"export_features",
1129 &export_features_operations, S_IRUGO},
Wendy Cheng4373ea82008-01-17 11:10:12 -05001130 [NFSD_FO_UnlockIP] = {"unlock_ip",
1131 &transaction_ops, S_IWUSR|S_IRUSR},
Wendy Cheng17efa372008-01-17 11:10:12 -05001132 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1133 &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1135 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -07001136 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Banks03cf6c92009-01-13 21:26:36 +11001137 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
Jeff Laytona2f999a2013-03-27 10:15:38 -04001138 [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", &reply_cache_stats_operations, S_IRUGO},
NeilBrown70c3b762005-11-07 01:00:25 -08001139 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -07001140 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -07001141 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
Jeff Layton5b8db002014-07-02 16:11:22 -04001142 [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001143#if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -05001144 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
J. Bruce Fieldsb084f592011-05-31 12:24:58 -04001145#endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146#ifdef CONFIG_NFSD_V4
1147 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
J. Bruce Fieldsefc4bb4f2010-03-02 11:04:06 -05001148 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -07001149 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Jeff Layton7f5ef2e2014-09-12 16:40:21 -04001150 [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151#endif
1152 /* last one */ {""}
1153 };
Eric W. Biedermand91ee872016-05-23 14:51:59 -05001154 get_net(sb->s_fs_info);
1155 return simple_fill_super(sb, 0x6e667364, nfsd_files);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156}
1157
Al Virofc14f2f2010-07-25 01:48:30 +04001158static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1159 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160{
Eric W. Biedermand91ee872016-05-23 14:51:59 -05001161 struct net *net = current->nsproxy->net_ns;
1162 return mount_ns(fs_type, flags, data, net, net->user_ns, nfsd_fill_super);
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +03001163}
1164
1165static void nfsd_umount(struct super_block *sb)
1166{
1167 struct net *net = sb->s_fs_info;
1168
1169 kill_litter_super(sb);
1170 put_net(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171}
1172
1173static struct file_system_type nfsd_fs_type = {
1174 .owner = THIS_MODULE,
1175 .name = "nfsd",
Al Virofc14f2f2010-07-25 01:48:30 +04001176 .mount = nfsd_mount,
Stanislav Kinsbursky11f77942013-02-01 15:56:12 +03001177 .kill_sb = nfsd_umount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001179MODULE_ALIAS_FS("nfsd");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001181#ifdef CONFIG_PROC_FS
1182static int create_proc_exports_entry(void)
1183{
1184 struct proc_dir_entry *entry;
1185
1186 entry = proc_mkdir("fs/nfs", NULL);
1187 if (!entry)
1188 return -ENOMEM;
Stanislav Kinsbursky96d851c2013-02-01 15:56:17 +03001189 entry = proc_create("exports", 0, entry,
1190 &exports_proc_operations);
fanchaotingff7c4b32013-03-27 16:31:18 +08001191 if (!entry) {
1192 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001193 return -ENOMEM;
fanchaotingff7c4b32013-03-27 16:31:18 +08001194 }
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001195 return 0;
1196}
1197#else /* CONFIG_PROC_FS */
1198static int create_proc_exports_entry(void)
1199{
1200 return 0;
1201}
1202#endif
1203
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001204int nfsd_net_id;
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001205
1206static __net_init int nfsd_init_net(struct net *net)
1207{
1208 int retval;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03001209 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001210
1211 retval = nfsd_export_init(net);
1212 if (retval)
1213 goto out_export_error;
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001214 retval = nfsd_idmap_init(net);
1215 if (retval)
1216 goto out_idmap_error;
Stanislav Kinsbursky3d733712012-11-27 14:11:44 +03001217 nn->nfsd4_lease = 90; /* default lease time */
Stanislav Kinsbursky5284b442012-11-27 14:11:49 +03001218 nn->nfsd4_grace = 90;
J. Bruce Fieldsebd7c722016-09-12 16:00:47 -04001219 nn->clverifier_counter = prandom_u32();
1220 nn->clientid_counter = prandom_u32();
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001221 return 0;
1222
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001223out_idmap_error:
1224 nfsd_export_shutdown(net);
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001225out_export_error:
1226 return retval;
1227}
1228
1229static __net_exit void nfsd_exit_net(struct net *net)
1230{
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001231 nfsd_idmap_shutdown(net);
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001232 nfsd_export_shutdown(net);
1233}
1234
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001235static struct pernet_operations nfsd_net_ops = {
Stanislav Kinsbursky5717e012012-04-11 15:13:35 +04001236 .init = nfsd_init_net,
1237 .exit = nfsd_exit_net,
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001238 .id = &nfsd_net_id,
1239 .size = sizeof(struct nfsd_net),
1240};
1241
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242static int __init init_nfsd(void)
1243{
1244 int retval;
1245 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1246
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001247 retval = register_pernet_subsys(&nfsd_net_ops);
1248 if (retval < 0)
Giuseppe Cantavenerabb7ffbf2015-04-20 18:00:08 +02001249 return retval;
1250 retval = register_cld_notifier();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001251 if (retval)
Jeff Layton7ea34ac2012-03-21 09:52:05 -04001252 goto out_unregister_pernet;
Giuseppe Cantavenerabb7ffbf2015-04-20 18:00:08 +02001253 retval = nfsd4_init_slabs();
1254 if (retval)
1255 goto out_unregister_notifier;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001256 retval = nfsd4_init_pnfs();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001257 if (retval)
1258 goto out_free_slabs;
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001259 retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */
1260 if (retval)
1261 goto out_exit_pnfs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001263 retval = nfsd_reply_cache_init();
1264 if (retval)
1265 goto out_free_stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001267 retval = create_proc_exports_entry();
1268 if (retval)
Stanislav Kinsburskyf69adb22012-04-11 17:33:05 +04001269 goto out_free_lockd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -05001271 if (retval)
1272 goto out_free_all;
1273 return 0;
1274out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001275 remove_proc_entry("fs/nfs/exports", NULL);
1276 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001277out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001278 nfsd_lockd_shutdown();
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001279 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001280out_free_stat:
1281 nfsd_stat_shutdown();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001282 nfsd_fault_inject_cleanup();
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001283out_exit_pnfs:
1284 nfsd4_exit_pnfs();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001285out_free_slabs:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001286 nfsd4_free_slabs();
Jeff Layton813fd322012-03-21 09:52:08 -04001287out_unregister_notifier:
Jeff Layton797a9d72012-03-29 07:52:49 -04001288 unregister_cld_notifier();
Giuseppe Cantavenerabb7ffbf2015-04-20 18:00:08 +02001289out_unregister_pernet:
1290 unregister_pernet_subsys(&nfsd_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 return retval;
1292}
1293
1294static void __exit exit_nfsd(void)
1295{
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001296 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 remove_proc_entry("fs/nfs/exports", NULL);
1298 remove_proc_entry("fs/nfs", NULL);
1299 nfsd_stat_shutdown();
1300 nfsd_lockd_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001301 nfsd4_free_slabs();
Christoph Hellwig9cf514c2014-05-05 13:11:59 +02001302 nfsd4_exit_pnfs();
Bryan Schumaker65178db2011-11-01 13:35:21 -04001303 nfsd_fault_inject_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 unregister_filesystem(&nfsd_fs_type);
Jeff Layton797a9d72012-03-29 07:52:49 -04001305 unregister_cld_notifier();
Giuseppe Cantavenerabb7ffbf2015-04-20 18:00:08 +02001306 unregister_pernet_subsys(&nfsd_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307}
1308
1309MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1310MODULE_LICENSE("GPL");
1311module_init(init_nfsd)
1312module_exit(exit_nfsd)