blob: 1f5eae40f34ef4aa57174be24445a39854906e71 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Syscall interface to knfsd.
3 *
4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
5 */
6
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09007#include <linux/slab.h>
Al Viro3f8206d2008-07-26 03:46:43 -04008#include <linux/namei.h>
NeilBrownb41b66d2006-10-02 02:17:48 -07009#include <linux/ctype.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010
NeilBrown80212d52006-10-02 02:17:47 -070011#include <linux/sunrpc/svcsock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/nfsd/syscall.h>
Wendy Cheng4373ea82008-01-17 11:10:12 -050013#include <linux/lockd/lockd.h>
Chuck Lever41160922009-08-09 15:09:40 -040014#include <linux/sunrpc/clnt.h>
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050015#include <linux/sunrpc/gss_api.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
J. Bruce Fields2ca72e12011-01-04 17:37:15 -050017#include "idmap.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +020018#include "nfsd.h"
19#include "cache.h"
20
Linus Torvalds1da177e2005-04-16 15:20:36 -070021/*
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050022 * We have a single directory with several nodes in it.
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 */
24enum {
25 NFSD_Root = 1,
NeilBrown1e140562010-09-22 12:55:07 +100026#ifdef CONFIG_NFSD_DEPRECATED
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 NFSD_Svc,
28 NFSD_Add,
29 NFSD_Del,
30 NFSD_Export,
31 NFSD_Unexport,
32 NFSD_Getfd,
33 NFSD_Getfs,
NeilBrown1e140562010-09-22 12:55:07 +100034#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 NFSD_List,
J. Bruce Fieldse8e87532009-12-14 12:53:32 -050036 NFSD_Export_features,
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 NFSD_Fh,
Wendy Cheng4373ea82008-01-17 11:10:12 -050038 NFSD_FO_UnlockIP,
Wendy Cheng17efa372008-01-17 11:10:12 -050039 NFSD_FO_UnlockFS,
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 NFSD_Threads,
Greg Bankseed29652006-10-02 02:18:02 -070041 NFSD_Pool_Threads,
Greg Banks03cf6c92009-01-13 21:26:36 +110042 NFSD_Pool_Stats,
NeilBrown70c3b762005-11-07 01:00:25 -080043 NFSD_Versions,
NeilBrown80212d52006-10-02 02:17:47 -070044 NFSD_Ports,
NeilBrown596bbe52006-10-04 02:15:48 -070045 NFSD_MaxBlkSize,
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -050046 NFSD_SupportedEnctypes,
NeilBrown70c3b762005-11-07 01:00:25 -080047 /*
48 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
49 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
50 */
51#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 NFSD_Leasetime,
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -050053 NFSD_Gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -070054 NFSD_RecoveryDir,
NeilBrown70c3b762005-11-07 01:00:25 -080055#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070056};
57
58/*
59 * write() for these nodes.
60 */
NeilBrown1e140562010-09-22 12:55:07 +100061#ifdef CONFIG_NFSD_DEPRECATED
Linus Torvalds1da177e2005-04-16 15:20:36 -070062static ssize_t write_svc(struct file *file, char *buf, size_t size);
63static ssize_t write_add(struct file *file, char *buf, size_t size);
64static ssize_t write_del(struct file *file, char *buf, size_t size);
65static ssize_t write_export(struct file *file, char *buf, size_t size);
66static ssize_t write_unexport(struct file *file, char *buf, size_t size);
67static ssize_t write_getfd(struct file *file, char *buf, size_t size);
68static ssize_t write_getfs(struct file *file, char *buf, size_t size);
NeilBrown1e140562010-09-22 12:55:07 +100069#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070070static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
Chuck Leverb046ccd2008-12-12 16:57:13 -050071static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
72static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073static ssize_t write_threads(struct file *file, char *buf, size_t size);
Greg Bankseed29652006-10-02 02:18:02 -070074static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080075static ssize_t write_versions(struct file *file, char *buf, size_t size);
NeilBrown80212d52006-10-02 02:17:47 -070076static ssize_t write_ports(struct file *file, char *buf, size_t size);
NeilBrown596bbe52006-10-04 02:15:48 -070077static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080078#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070079static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -050080static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
NeilBrown0964a3d2005-06-23 22:04:32 -070081static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
NeilBrown70c3b762005-11-07 01:00:25 -080082#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84static ssize_t (*write_op[])(struct file *, char *, size_t) = {
NeilBrown1e140562010-09-22 12:55:07 +100085#ifdef CONFIG_NFSD_DEPRECATED
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 [NFSD_Svc] = write_svc,
87 [NFSD_Add] = write_add,
88 [NFSD_Del] = write_del,
89 [NFSD_Export] = write_export,
90 [NFSD_Unexport] = write_unexport,
91 [NFSD_Getfd] = write_getfd,
92 [NFSD_Getfs] = write_getfs,
NeilBrown1e140562010-09-22 12:55:07 +100093#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 [NFSD_Fh] = write_filehandle,
Chuck Leverb046ccd2008-12-12 16:57:13 -050095 [NFSD_FO_UnlockIP] = write_unlock_ip,
96 [NFSD_FO_UnlockFS] = write_unlock_fs,
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 [NFSD_Threads] = write_threads,
Greg Bankseed29652006-10-02 02:18:02 -070098 [NFSD_Pool_Threads] = write_pool_threads,
NeilBrown70c3b762005-11-07 01:00:25 -080099 [NFSD_Versions] = write_versions,
NeilBrown80212d52006-10-02 02:17:47 -0700100 [NFSD_Ports] = write_ports,
NeilBrown596bbe52006-10-04 02:15:48 -0700101 [NFSD_MaxBlkSize] = write_maxblksize,
NeilBrown70c3b762005-11-07 01:00:25 -0800102#ifdef CONFIG_NFSD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 [NFSD_Leasetime] = write_leasetime,
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -0500104 [NFSD_Gracetime] = write_gracetime,
NeilBrown0964a3d2005-06-23 22:04:32 -0700105 [NFSD_RecoveryDir] = write_recoverydir,
NeilBrown70c3b762005-11-07 01:00:25 -0800106#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107};
108
109static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
110{
Josef "Jeff" Sipek7eaa36e2006-12-08 02:36:41 -0800111 ino_t ino = file->f_path.dentry->d_inode->i_ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 char *data;
113 ssize_t rv;
114
Tobias Klausere8c96f82006-03-24 03:15:34 -0800115 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 return -EINVAL;
117
118 data = simple_transaction_get(file, buf, size);
119 if (IS_ERR(data))
120 return PTR_ERR(data);
121
122 rv = write_op[ino](file, data, size);
NeilBrown8971a102007-02-14 00:33:11 -0800123 if (rv >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 simple_transaction_set(file, rv);
125 rv = size;
126 }
127 return rv;
128}
129
NeilBrown73900222005-11-07 01:00:24 -0800130static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
131{
bookjovi@gmail.com5b6a5992010-12-11 00:21:17 -0500132#ifdef CONFIG_NFSD_DEPRECATED
NeilBrownc67874f2010-09-22 12:55:07 +1000133 static int warned;
134 if (file->f_dentry->d_name.name[0] == '.' && !warned) {
NeilBrownc67874f2010-09-22 12:55:07 +1000135 printk(KERN_INFO
136 "Warning: \"%s\" uses deprecated NFSD interface: %s."
137 " This will be removed in 2.6.40\n",
Pavel Emelyanov049ef272010-09-23 18:26:58 +0400138 current->comm, file->f_dentry->d_name.name);
NeilBrownc67874f2010-09-22 12:55:07 +1000139 warned = 1;
140 }
bookjovi@gmail.com5b6a5992010-12-11 00:21:17 -0500141#endif
NeilBrown73900222005-11-07 01:00:24 -0800142 if (! file->private_data) {
143 /* An attempt to read a transaction file without writing
144 * causes a 0-byte write so that the file can return
145 * state information
146 */
147 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
148 if (rv < 0)
149 return rv;
150 }
151 return simple_transaction_read(file, buf, size, pos);
152}
153
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800154static const struct file_operations transaction_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 .write = nfsctl_transaction_write,
NeilBrown73900222005-11-07 01:00:24 -0800156 .read = nfsctl_transaction_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 .release = simple_transaction_release,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200158 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159};
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161static int exports_open(struct inode *inode, struct file *file)
162{
163 return seq_open(file, &nfs_exports_op);
164}
165
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800166static const struct file_operations exports_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 .open = exports_open,
168 .read = seq_read,
169 .llseek = seq_lseek,
170 .release = seq_release,
Denis V. Lunev9ef2db22008-04-29 01:02:04 -0700171 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172};
173
J. Bruce Fieldse8e87532009-12-14 12:53:32 -0500174static int export_features_show(struct seq_file *m, void *v)
175{
176 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
177 return 0;
178}
179
180static int export_features_open(struct inode *inode, struct file *file)
181{
182 return single_open(file, export_features_show, NULL);
183}
184
185static struct file_operations export_features_operations = {
186 .open = export_features_open,
187 .read = seq_read,
188 .llseek = seq_lseek,
189 .release = single_release,
190};
191
J. Bruce Fields0a5e5f12011-03-14 20:57:44 -0400192#ifdef CONFIG_SUNRPC_GSS
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500193static int supported_enctypes_show(struct seq_file *m, void *v)
194{
195 struct gss_api_mech *k5mech;
196
197 k5mech = gss_mech_get_by_name("krb5");
198 if (k5mech == NULL)
199 goto out;
200 if (k5mech->gm_upcall_enctypes != NULL)
201 seq_printf(m, k5mech->gm_upcall_enctypes);
202 gss_mech_put(k5mech);
203out:
204 return 0;
205}
206
207static int supported_enctypes_open(struct inode *inode, struct file *file)
208{
209 return single_open(file, supported_enctypes_show, NULL);
210}
211
212static struct file_operations supported_enctypes_ops = {
213 .open = supported_enctypes_open,
214 .read = seq_read,
215 .llseek = seq_lseek,
216 .release = single_release,
217};
J. Bruce Fields0a5e5f12011-03-14 20:57:44 -0400218#endif /* CONFIG_SUNRPC_GSS */
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -0500219
Greg Banks03cf6c92009-01-13 21:26:36 +1100220extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900221extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
Greg Banks03cf6c92009-01-13 21:26:36 +1100222
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700223static const struct file_operations pool_stats_operations = {
Greg Banks03cf6c92009-01-13 21:26:36 +1100224 .open = nfsd_pool_stats_open,
225 .read = seq_read,
226 .llseek = seq_lseek,
Ryusei Yamaguchied2d8ae2009-08-16 00:54:41 +0900227 .release = nfsd_pool_stats_release,
Greg Banks03cf6c92009-01-13 21:26:36 +1100228 .owner = THIS_MODULE,
229};
230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231/*----------------------------------------------------------------------------*/
232/*
233 * payload - write methods
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 */
235
NeilBrown1e140562010-09-22 12:55:07 +1000236#ifdef CONFIG_NFSD_DEPRECATED
Chuck Lever262a0982008-12-12 16:57:35 -0500237/**
238 * write_svc - Start kernel's NFSD server
239 *
240 * Deprecated. /proc/fs/nfsd/threads is preferred.
241 * Function remains to support old versions of nfs-utils.
242 *
243 * Input:
244 * buf: struct nfsctl_svc
245 * svc_port: port number of this
246 * server's listener
247 * svc_nthreads: number of threads to start
248 * size: size in bytes of passed in nfsctl_svc
249 * Output:
250 * On success: returns zero
251 * On error: return code is negative errno value
252 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253static ssize_t write_svc(struct file *file, char *buf, size_t size)
254{
255 struct nfsctl_svc *data;
NeilBrown82e12fe2009-06-16 11:03:07 +1000256 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 if (size < sizeof(*data))
258 return -EINVAL;
259 data = (struct nfsctl_svc*) buf;
NeilBrown82e12fe2009-06-16 11:03:07 +1000260 err = nfsd_svc(data->svc_port, data->svc_nthreads);
261 if (err < 0)
262 return err;
263 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264}
265
Chuck Lever262a0982008-12-12 16:57:35 -0500266/**
267 * write_add - Add or modify client entry in auth unix cache
268 *
269 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
270 * Function remains to support old versions of nfs-utils.
271 *
272 * Input:
273 * buf: struct nfsctl_client
274 * cl_ident: '\0'-terminated C string
275 * containing domain name
276 * of client
277 * cl_naddr: no. of items in cl_addrlist
278 * cl_addrlist: array of client addresses
279 * cl_fhkeytype: ignored
280 * cl_fhkeylen: ignored
281 * cl_fhkey: ignored
282 * size: size in bytes of passed in nfsctl_client
283 * Output:
284 * On success: returns zero
285 * On error: return code is negative errno value
286 *
287 * Note: Only AF_INET client addresses are passed in, since
288 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
289 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290static ssize_t write_add(struct file *file, char *buf, size_t size)
291{
292 struct nfsctl_client *data;
293 if (size < sizeof(*data))
294 return -EINVAL;
295 data = (struct nfsctl_client *)buf;
296 return exp_addclient(data);
297}
298
Chuck Lever262a0982008-12-12 16:57:35 -0500299/**
300 * write_del - Remove client from auth unix cache
301 *
302 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
303 * Function remains to support old versions of nfs-utils.
304 *
305 * Input:
306 * buf: struct nfsctl_client
307 * cl_ident: '\0'-terminated C string
308 * containing domain name
309 * of client
310 * cl_naddr: ignored
311 * cl_addrlist: ignored
312 * cl_fhkeytype: ignored
313 * cl_fhkeylen: ignored
314 * cl_fhkey: ignored
315 * size: size in bytes of passed in nfsctl_client
316 * Output:
317 * On success: returns zero
318 * On error: return code is negative errno value
319 *
320 * Note: Only AF_INET client addresses are passed in, since
321 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
322 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323static ssize_t write_del(struct file *file, char *buf, size_t size)
324{
325 struct nfsctl_client *data;
326 if (size < sizeof(*data))
327 return -EINVAL;
328 data = (struct nfsctl_client *)buf;
329 return exp_delclient(data);
330}
331
Chuck Lever262a0982008-12-12 16:57:35 -0500332/**
333 * write_export - Export part or all of a local file system
334 *
335 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
336 * Function remains to support old versions of nfs-utils.
337 *
338 * Input:
339 * buf: struct nfsctl_export
340 * ex_client: '\0'-terminated C string
341 * containing domain name
342 * of client allowed to access
343 * this export
344 * ex_path: '\0'-terminated C string
345 * containing pathname of
346 * directory in local file system
347 * ex_dev: fsid to use for this export
348 * ex_ino: ignored
349 * ex_flags: export flags for this export
350 * ex_anon_uid: UID to use for anonymous
351 * requests
352 * ex_anon_gid: GID to use for anonymous
353 * requests
354 * size: size in bytes of passed in nfsctl_export
355 * Output:
356 * On success: returns zero
357 * On error: return code is negative errno value
358 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359static ssize_t write_export(struct file *file, char *buf, size_t size)
360{
361 struct nfsctl_export *data;
362 if (size < sizeof(*data))
363 return -EINVAL;
364 data = (struct nfsctl_export*)buf;
365 return exp_export(data);
366}
367
Chuck Lever262a0982008-12-12 16:57:35 -0500368/**
369 * write_unexport - Unexport a previously exported file system
370 *
371 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
372 * Function remains to support old versions of nfs-utils.
373 *
374 * Input:
375 * buf: struct nfsctl_export
376 * ex_client: '\0'-terminated C string
377 * containing domain name
378 * of client no longer allowed
379 * to access this export
380 * ex_path: '\0'-terminated C string
381 * containing pathname of
382 * directory in local file system
383 * ex_dev: ignored
384 * ex_ino: ignored
385 * ex_flags: ignored
386 * ex_anon_uid: ignored
387 * ex_anon_gid: ignored
388 * size: size in bytes of passed in nfsctl_export
389 * Output:
390 * On success: returns zero
391 * On error: return code is negative errno value
392 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393static ssize_t write_unexport(struct file *file, char *buf, size_t size)
394{
395 struct nfsctl_export *data;
396
397 if (size < sizeof(*data))
398 return -EINVAL;
399 data = (struct nfsctl_export*)buf;
400 return exp_unexport(data);
401}
402
Chuck Lever262a0982008-12-12 16:57:35 -0500403/**
404 * write_getfs - Get a variable-length NFS file handle by path
405 *
406 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
407 * Function remains to support old versions of nfs-utils.
408 *
409 * Input:
410 * buf: struct nfsctl_fsparm
411 * gd_addr: socket address of client
412 * gd_path: '\0'-terminated C string
413 * containing pathname of
414 * directory in local file system
415 * gd_maxlen: maximum size of returned file
416 * handle
417 * size: size in bytes of passed in nfsctl_fsparm
418 * Output:
419 * On success: passed-in buffer filled with a knfsd_fh structure
420 * (a variable-length raw NFS file handle);
421 * return code is the size in bytes of the file handle
422 * On error: return code is negative errno value
423 *
424 * Note: Only AF_INET client addresses are passed in, since gd_addr
425 * is the same size as a struct sockaddr_in.
426 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427static ssize_t write_getfs(struct file *file, char *buf, size_t size)
428{
429 struct nfsctl_fsparm *data;
430 struct sockaddr_in *sin;
431 struct auth_domain *clp;
432 int err = 0;
433 struct knfsd_fh *res;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100434 struct in6_addr in6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
436 if (size < sizeof(*data))
437 return -EINVAL;
438 data = (struct nfsctl_fsparm*)buf;
439 err = -EPROTONOSUPPORT;
440 if (data->gd_addr.sa_family != AF_INET)
441 goto out;
442 sin = (struct sockaddr_in *)&data->gd_addr;
443 if (data->gd_maxlen > NFS3_FHSIZE)
444 data->gd_maxlen = NFS3_FHSIZE;
445
446 res = (struct knfsd_fh*)buf;
447
448 exp_readlock();
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100449
450 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
451
Pavel Emelyanov352114f2010-09-27 13:59:48 +0400452 clp = auth_unix_lookup(&init_net, &in6);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100453 if (!clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 err = -EPERM;
455 else {
456 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
457 auth_domain_put(clp);
458 }
459 exp_readunlock();
460 if (err == 0)
Andrew Morton12127492007-07-17 04:04:34 -0700461 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 out:
463 return err;
464}
465
Chuck Lever262a0982008-12-12 16:57:35 -0500466/**
467 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
468 *
469 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
470 * Function remains to support old versions of nfs-utils.
471 *
472 * Input:
473 * buf: struct nfsctl_fdparm
474 * gd_addr: socket address of client
475 * gd_path: '\0'-terminated C string
476 * containing pathname of
477 * directory in local file system
478 * gd_version: fdparm structure version
479 * size: size in bytes of passed in nfsctl_fdparm
480 * Output:
481 * On success: passed-in buffer filled with nfsctl_res
482 * (a fixed-length raw NFS file handle);
483 * return code is the size in bytes of the file handle
484 * On error: return code is negative errno value
485 *
486 * Note: Only AF_INET client addresses are passed in, since gd_addr
487 * is the same size as a struct sockaddr_in.
488 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489static ssize_t write_getfd(struct file *file, char *buf, size_t size)
490{
491 struct nfsctl_fdparm *data;
492 struct sockaddr_in *sin;
493 struct auth_domain *clp;
494 int err = 0;
495 struct knfsd_fh fh;
496 char *res;
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100497 struct in6_addr in6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499 if (size < sizeof(*data))
500 return -EINVAL;
501 data = (struct nfsctl_fdparm*)buf;
502 err = -EPROTONOSUPPORT;
503 if (data->gd_addr.sa_family != AF_INET)
504 goto out;
505 err = -EINVAL;
506 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
507 goto out;
508
509 res = buf;
510 sin = (struct sockaddr_in *)&data->gd_addr;
511 exp_readlock();
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100512
513 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
514
Pavel Emelyanov352114f2010-09-27 13:59:48 +0400515 clp = auth_unix_lookup(&init_net, &in6);
Aurélien Charbonf15364b2008-01-18 15:50:56 +0100516 if (!clp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 err = -EPERM;
518 else {
519 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
520 auth_domain_put(clp);
521 }
522 exp_readunlock();
523
524 if (err == 0) {
525 memset(res,0, NFS_FHSIZE);
526 memcpy(res, &fh.fh_base, fh.fh_size);
527 err = NFS_FHSIZE;
528 }
529 out:
530 return err;
531}
NeilBrown1e140562010-09-22 12:55:07 +1000532#endif /* CONFIG_NFSD_DEPRECATED */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
Chuck Lever262a0982008-12-12 16:57:35 -0500534/**
535 * write_unlock_ip - Release all locks used by a client
536 *
537 * Experimental.
538 *
539 * Input:
540 * buf: '\n'-terminated C string containing a
Chuck Lever41160922009-08-09 15:09:40 -0400541 * presentation format IP address
Chuck Lever262a0982008-12-12 16:57:35 -0500542 * size: length of C string in @buf
543 * Output:
544 * On success: returns zero if all specified locks were released;
545 * returns one if one or more locks were not released
546 * On error: return code is negative errno value
Chuck Lever262a0982008-12-12 16:57:35 -0500547 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500548static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500549{
Chuck Lever41160922009-08-09 15:09:40 -0400550 struct sockaddr_storage address;
551 struct sockaddr *sap = (struct sockaddr *)&address;
552 size_t salen = sizeof(address);
Chuck Lever367c8c72008-06-30 18:58:14 -0400553 char *fo_path;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500554
555 /* sanity check */
556 if (size == 0)
557 return -EINVAL;
558
559 if (buf[size-1] != '\n')
560 return -EINVAL;
561
562 fo_path = buf;
563 if (qword_get(&buf, fo_path, size) < 0)
564 return -EINVAL;
565
Chuck Lever41160922009-08-09 15:09:40 -0400566 if (rpc_pton(fo_path, size, sap, salen) == 0)
Wendy Cheng4373ea82008-01-17 11:10:12 -0500567 return -EINVAL;
Wendy Cheng4373ea82008-01-17 11:10:12 -0500568
Chuck Lever41160922009-08-09 15:09:40 -0400569 return nlmsvc_unlock_all_by_ip(sap);
Wendy Cheng4373ea82008-01-17 11:10:12 -0500570}
571
Chuck Lever262a0982008-12-12 16:57:35 -0500572/**
573 * write_unlock_fs - Release all locks on a local file system
574 *
575 * Experimental.
576 *
577 * Input:
578 * buf: '\n'-terminated C string containing the
579 * absolute pathname of a local file system
580 * size: length of C string in @buf
581 * Output:
582 * On success: returns zero if all specified locks were released;
583 * returns one if one or more locks were not released
584 * On error: return code is negative errno value
585 */
Chuck Leverb046ccd2008-12-12 16:57:13 -0500586static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
Wendy Cheng17efa372008-01-17 11:10:12 -0500587{
Al Viroa63bb992008-08-02 01:03:36 -0400588 struct path path;
Wendy Cheng17efa372008-01-17 11:10:12 -0500589 char *fo_path;
590 int error;
591
592 /* sanity check */
593 if (size == 0)
594 return -EINVAL;
595
596 if (buf[size-1] != '\n')
597 return -EINVAL;
598
599 fo_path = buf;
600 if (qword_get(&buf, fo_path, size) < 0)
601 return -EINVAL;
602
Al Viroa63bb992008-08-02 01:03:36 -0400603 error = kern_path(fo_path, 0, &path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500604 if (error)
605 return error;
606
Chuck Lever262a0982008-12-12 16:57:35 -0500607 /*
608 * XXX: Needs better sanity checking. Otherwise we could end up
609 * releasing locks on the wrong file system.
610 *
611 * For example:
612 * 1. Does the path refer to a directory?
613 * 2. Is that directory a mount point, or
614 * 3. Is that directory the root of an exported file system?
615 */
Al Viroa63bb992008-08-02 01:03:36 -0400616 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
Wendy Cheng17efa372008-01-17 11:10:12 -0500617
Al Viroa63bb992008-08-02 01:03:36 -0400618 path_put(&path);
Wendy Cheng17efa372008-01-17 11:10:12 -0500619 return error;
620}
621
Chuck Lever262a0982008-12-12 16:57:35 -0500622/**
623 * write_filehandle - Get a variable-length NFS file handle by path
624 *
625 * On input, the buffer contains a '\n'-terminated C string comprised of
626 * three alphanumeric words separated by whitespace. The string may
627 * contain escape sequences.
628 *
629 * Input:
630 * buf:
631 * domain: client domain name
632 * path: export pathname
633 * maxsize: numeric maximum size of
634 * @buf
635 * size: length of C string in @buf
636 * Output:
637 * On success: passed-in buffer filled with '\n'-terminated C
638 * string containing a ASCII hex text version
639 * of the NFS file handle;
640 * return code is the size in bytes of the string
641 * On error: return code is negative errno value
642 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
644{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 char *dname, *path;
Andrew Morton246d95b2007-08-09 00:53:50 -0700646 int uninitialized_var(maxsize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 char *mesg = buf;
648 int len;
649 struct auth_domain *dom;
650 struct knfsd_fh fh;
651
J. Bruce Fields87d26ea2008-01-22 17:40:42 -0500652 if (size == 0)
653 return -EINVAL;
654
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 if (buf[size-1] != '\n')
656 return -EINVAL;
657 buf[size-1] = 0;
658
659 dname = mesg;
660 len = qword_get(&mesg, dname, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500661 if (len <= 0)
662 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
664 path = dname+len+1;
665 len = qword_get(&mesg, path, size);
Chuck Lever54224f02008-12-12 16:57:20 -0500666 if (len <= 0)
667 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
669 len = get_int(&mesg, &maxsize);
670 if (len)
671 return len;
672
673 if (maxsize < NFS_FHSIZE)
674 return -EINVAL;
675 if (maxsize > NFS3_FHSIZE)
676 maxsize = NFS3_FHSIZE;
677
678 if (qword_get(&mesg, mesg, size)>0)
679 return -EINVAL;
680
681 /* we have all the words, they are in buf.. */
682 dom = unix_domain_find(dname);
683 if (!dom)
684 return -ENOMEM;
685
686 len = exp_rootfh(dom, path, &fh, maxsize);
687 auth_domain_put(dom);
688 if (len)
689 return len;
690
Chuck Lever54224f02008-12-12 16:57:20 -0500691 mesg = buf;
692 len = SIMPLE_TRANSACTION_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
694 mesg[-1] = '\n';
695 return mesg - buf;
696}
697
Chuck Lever262a0982008-12-12 16:57:35 -0500698/**
699 * write_threads - Start NFSD, or report the current number of running threads
700 *
701 * Input:
702 * buf: ignored
703 * size: zero
704 * Output:
705 * On success: passed-in buffer filled with '\n'-terminated C
706 * string numeric value representing the number of
707 * running NFSD threads;
708 * return code is the size in bytes of the string
709 * On error: return code is zero
710 *
711 * OR
712 *
713 * Input:
714 * buf: C string containing an unsigned
715 * integer value representing the
716 * number of NFSD threads to start
717 * size: non-zero length of C string in @buf
718 * Output:
719 * On success: NFS service is started;
720 * passed-in buffer filled with '\n'-terminated C
721 * string numeric value representing the number of
722 * running NFSD threads;
723 * return code is the size in bytes of the string
724 * On error: return code is zero or a negative errno value
725 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726static ssize_t write_threads(struct file *file, char *buf, size_t size)
727{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 char *mesg = buf;
729 int rv;
730 if (size > 0) {
731 int newthreads;
732 rv = get_int(&mesg, &newthreads);
733 if (rv)
734 return rv;
Chuck Lever9e074852008-12-12 16:57:27 -0500735 if (newthreads < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 return -EINVAL;
Chuck Lever9e074852008-12-12 16:57:27 -0500737 rv = nfsd_svc(NFS_PORT, newthreads);
NeilBrown82e12fe2009-06-16 11:03:07 +1000738 if (rv < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 return rv;
NeilBrown82e12fe2009-06-16 11:03:07 +1000740 } else
741 rv = nfsd_nrthreads();
Chuck Levere06b6402009-04-23 19:33:25 -0400742
NeilBrown82e12fe2009-06-16 11:03:07 +1000743 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744}
745
Chuck Lever262a0982008-12-12 16:57:35 -0500746/**
747 * write_pool_threads - Set or report the current number of threads per pool
748 *
749 * Input:
750 * buf: ignored
751 * size: zero
752 *
753 * OR
754 *
755 * Input:
756 * buf: C string containing whitespace-
757 * separated unsigned integer values
758 * representing the number of NFSD
759 * threads to start in each pool
760 * size: non-zero length of C string in @buf
761 * Output:
762 * On success: passed-in buffer filled with '\n'-terminated C
763 * string containing integer values representing the
764 * number of NFSD threads in each pool;
765 * return code is the size in bytes of the string
766 * On error: return code is zero or a negative errno value
767 */
Greg Bankseed29652006-10-02 02:18:02 -0700768static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
769{
770 /* if size > 0, look for an array of number of threads per node
771 * and apply them then write out number of threads per node as reply
772 */
773 char *mesg = buf;
774 int i;
775 int rv;
776 int len;
Neil Brownbedbdd82008-06-10 08:40:35 -0400777 int npools;
Greg Bankseed29652006-10-02 02:18:02 -0700778 int *nthreads;
779
Neil Brownbedbdd82008-06-10 08:40:35 -0400780 mutex_lock(&nfsd_mutex);
781 npools = nfsd_nrpools();
Greg Bankseed29652006-10-02 02:18:02 -0700782 if (npools == 0) {
783 /*
784 * NFS is shut down. The admin can start it by
785 * writing to the threads file but NOT the pool_threads
786 * file, sorry. Report zero threads.
787 */
Neil Brownbedbdd82008-06-10 08:40:35 -0400788 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700789 strcpy(buf, "0\n");
790 return strlen(buf);
791 }
792
793 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
Neil Brownbedbdd82008-06-10 08:40:35 -0400794 rv = -ENOMEM;
Greg Bankseed29652006-10-02 02:18:02 -0700795 if (nthreads == NULL)
Neil Brownbedbdd82008-06-10 08:40:35 -0400796 goto out_free;
Greg Bankseed29652006-10-02 02:18:02 -0700797
798 if (size > 0) {
799 for (i = 0; i < npools; i++) {
800 rv = get_int(&mesg, &nthreads[i]);
801 if (rv == -ENOENT)
802 break; /* fewer numbers than pools */
803 if (rv)
804 goto out_free; /* syntax error */
805 rv = -EINVAL;
806 if (nthreads[i] < 0)
807 goto out_free;
808 }
809 rv = nfsd_set_nrthreads(i, nthreads);
810 if (rv)
811 goto out_free;
812 }
813
814 rv = nfsd_get_nrthreads(npools, nthreads);
815 if (rv)
816 goto out_free;
817
818 mesg = buf;
819 size = SIMPLE_TRANSACTION_LIMIT;
820 for (i = 0; i < npools && size > 0; i++) {
821 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
822 len = strlen(mesg);
823 size -= len;
824 mesg += len;
825 }
J. Bruce Fields413d63d2009-07-28 11:37:25 -0400826 rv = mesg - buf;
Greg Bankseed29652006-10-02 02:18:02 -0700827out_free:
828 kfree(nthreads);
Neil Brownbedbdd82008-06-10 08:40:35 -0400829 mutex_unlock(&nfsd_mutex);
Greg Bankseed29652006-10-02 02:18:02 -0700830 return rv;
831}
832
Jeff Layton3dd98a32008-06-10 08:40:36 -0400833static ssize_t __write_versions(struct file *file, char *buf, size_t size)
NeilBrown70c3b762005-11-07 01:00:25 -0800834{
NeilBrown70c3b762005-11-07 01:00:25 -0800835 char *mesg = buf;
Benny Halevy8daf2202009-04-03 08:28:59 +0300836 char *vers, *minorp, sign;
Chuck Lever261758b2009-04-23 19:33:18 -0400837 int len, num, remaining;
Benny Halevy8daf2202009-04-03 08:28:59 +0300838 unsigned minor;
NeilBrown70c3b762005-11-07 01:00:25 -0800839 ssize_t tlen = 0;
840 char *sep;
841
842 if (size>0) {
843 if (nfsd_serv)
NeilBrown6658d3a2006-10-02 02:17:46 -0700844 /* Cannot change versions without updating
845 * nfsd_serv->sv_xdrsize, and reallocing
846 * rq_argp and rq_resp
847 */
NeilBrown70c3b762005-11-07 01:00:25 -0800848 return -EBUSY;
849 if (buf[size-1] != '\n')
850 return -EINVAL;
851 buf[size-1] = 0;
852
853 vers = mesg;
854 len = qword_get(&mesg, vers, size);
855 if (len <= 0) return -EINVAL;
856 do {
857 sign = *vers;
858 if (sign == '+' || sign == '-')
Benny Halevy8daf2202009-04-03 08:28:59 +0300859 num = simple_strtol((vers+1), &minorp, 0);
NeilBrown70c3b762005-11-07 01:00:25 -0800860 else
Benny Halevy8daf2202009-04-03 08:28:59 +0300861 num = simple_strtol(vers, &minorp, 0);
862 if (*minorp == '.') {
863 if (num < 4)
864 return -EINVAL;
865 minor = simple_strtoul(minorp+1, NULL, 0);
866 if (minor == 0)
867 return -EINVAL;
868 if (nfsd_minorversion(minor, sign == '-' ?
869 NFSD_CLEAR : NFSD_SET) < 0)
870 return -EINVAL;
871 goto next;
872 }
NeilBrown70c3b762005-11-07 01:00:25 -0800873 switch(num) {
874 case 2:
875 case 3:
876 case 4:
NeilBrown6658d3a2006-10-02 02:17:46 -0700877 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
NeilBrown70c3b762005-11-07 01:00:25 -0800878 break;
879 default:
880 return -EINVAL;
881 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300882 next:
NeilBrown70c3b762005-11-07 01:00:25 -0800883 vers += len + 1;
NeilBrown70c3b762005-11-07 01:00:25 -0800884 } while ((len = qword_get(&mesg, vers, size)) > 0);
885 /* If all get turned off, turn them back on, as
886 * having no versions is BAD
887 */
NeilBrown6658d3a2006-10-02 02:17:46 -0700888 nfsd_reset_versions();
NeilBrown70c3b762005-11-07 01:00:25 -0800889 }
Chuck Lever261758b2009-04-23 19:33:18 -0400890
NeilBrown70c3b762005-11-07 01:00:25 -0800891 /* Now write current state into reply buffer */
892 len = 0;
893 sep = "";
Chuck Lever261758b2009-04-23 19:33:18 -0400894 remaining = SIMPLE_TRANSACTION_LIMIT;
NeilBrown70c3b762005-11-07 01:00:25 -0800895 for (num=2 ; num <= 4 ; num++)
NeilBrown6658d3a2006-10-02 02:17:46 -0700896 if (nfsd_vers(num, NFSD_AVAIL)) {
Chuck Lever261758b2009-04-23 19:33:18 -0400897 len = snprintf(buf, remaining, "%s%c%d", sep,
NeilBrown6658d3a2006-10-02 02:17:46 -0700898 nfsd_vers(num, NFSD_TEST)?'+':'-',
NeilBrown70c3b762005-11-07 01:00:25 -0800899 num);
900 sep = " ";
Chuck Lever261758b2009-04-23 19:33:18 -0400901
902 if (len > remaining)
903 break;
904 remaining -= len;
905 buf += len;
906 tlen += len;
NeilBrown70c3b762005-11-07 01:00:25 -0800907 }
Benny Halevy8daf2202009-04-03 08:28:59 +0300908 if (nfsd_vers(4, NFSD_AVAIL))
Chuck Lever261758b2009-04-23 19:33:18 -0400909 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
910 minor++) {
911 len = snprintf(buf, remaining, " %c4.%u",
Benny Halevy8daf2202009-04-03 08:28:59 +0300912 (nfsd_vers(4, NFSD_TEST) &&
913 nfsd_minorversion(minor, NFSD_TEST)) ?
914 '+' : '-',
915 minor);
Chuck Lever261758b2009-04-23 19:33:18 -0400916
917 if (len > remaining)
918 break;
919 remaining -= len;
920 buf += len;
921 tlen += len;
922 }
923
924 len = snprintf(buf, remaining, "\n");
925 if (len > remaining)
926 return -EINVAL;
927 return tlen + len;
NeilBrown70c3b762005-11-07 01:00:25 -0800928}
929
Chuck Lever262a0982008-12-12 16:57:35 -0500930/**
931 * write_versions - Set or report the available NFS protocol versions
932 *
933 * Input:
934 * buf: ignored
935 * size: zero
936 * Output:
937 * On success: passed-in buffer filled with '\n'-terminated C
938 * string containing positive or negative integer
939 * values representing the current status of each
940 * protocol version;
941 * return code is the size in bytes of the string
942 * On error: return code is zero or a negative errno value
943 *
944 * OR
945 *
946 * Input:
947 * buf: C string containing whitespace-
948 * separated positive or negative
949 * integer values representing NFS
950 * protocol versions to enable ("+n")
951 * or disable ("-n")
952 * size: non-zero length of C string in @buf
953 * Output:
954 * On success: status of zero or more protocol versions has
955 * been updated; passed-in buffer filled with
956 * '\n'-terminated C string containing positive
957 * or negative integer values representing the
958 * current status of each protocol version;
959 * return code is the size in bytes of the string
960 * On error: return code is zero or a negative errno value
961 */
Jeff Layton3dd98a32008-06-10 08:40:36 -0400962static ssize_t write_versions(struct file *file, char *buf, size_t size)
963{
964 ssize_t rv;
965
966 mutex_lock(&nfsd_mutex);
967 rv = __write_versions(file, buf, size);
968 mutex_unlock(&nfsd_mutex);
969 return rv;
970}
971
Chuck Lever4cd5dc72009-04-23 19:31:32 -0400972/*
Chuck Lever0a5372d2009-04-23 19:32:10 -0400973 * Zero-length write. Return a list of NFSD's current listener
974 * transports.
975 */
976static ssize_t __write_ports_names(char *buf)
977{
978 if (nfsd_serv == NULL)
979 return 0;
Chuck Lever335c54b2009-04-23 19:32:25 -0400980 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
Chuck Lever0a5372d2009-04-23 19:32:10 -0400981}
982
983/*
Chuck Lever0b7c2f62009-04-23 19:31:55 -0400984 * A single 'fd' number was written, in which case it must be for
985 * a socket of a supported family/protocol, and we use it as an
986 * nfsd listener.
987 */
988static ssize_t __write_ports_addfd(char *buf)
989{
990 char *mesg = buf;
991 int fd, err;
992
993 err = get_int(&mesg, &fd);
994 if (err != 0 || fd < 0)
995 return -EINVAL;
996
997 err = nfsd_create_serv();
998 if (err != 0)
999 return err;
1000
Chuck Leverbfba9ab2009-04-23 19:32:33 -04001001 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
Jeff Layton78a8d7c2010-07-19 16:50:05 -04001002 if (err < 0) {
Jeff Layton78a8d7c2010-07-19 16:50:05 -04001003 svc_destroy(nfsd_serv);
1004 return err;
1005 }
Chuck Lever0b7c2f62009-04-23 19:31:55 -04001006
Chuck Leverea068ba2009-04-23 19:32:18 -04001007 /* Decrease the count, but don't shut down the service */
1008 nfsd_serv->sv_nrthreads--;
1009 return err;
Chuck Lever0b7c2f62009-04-23 19:31:55 -04001010}
1011
1012/*
Chuck Lever82d56592009-04-23 19:31:48 -04001013 * A '-' followed by the 'name' of a socket means we close the socket.
1014 */
1015static ssize_t __write_ports_delfd(char *buf)
1016{
1017 char *toclose;
1018 int len = 0;
1019
1020 toclose = kstrdup(buf + 1, GFP_KERNEL);
1021 if (toclose == NULL)
1022 return -ENOMEM;
1023
1024 if (nfsd_serv != NULL)
Chuck Lever8435d342009-04-23 19:32:40 -04001025 len = svc_sock_names(nfsd_serv, buf,
1026 SIMPLE_TRANSACTION_LIMIT, toclose);
Chuck Lever82d56592009-04-23 19:31:48 -04001027 kfree(toclose);
1028 return len;
1029}
1030
1031/*
Chuck Lever4eb68c22009-04-23 19:31:40 -04001032 * A transport listener is added by writing it's transport name and
1033 * a port number.
1034 */
1035static ssize_t __write_ports_addxprt(char *buf)
1036{
1037 char transport[16];
Chuck Lever37498292010-01-26 14:04:22 -05001038 struct svc_xprt *xprt;
Chuck Lever4eb68c22009-04-23 19:31:40 -04001039 int port, err;
1040
1041 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
1042 return -EINVAL;
1043
Alexey Dobriyan4be929b2010-05-24 14:33:03 -07001044 if (port < 1 || port > USHRT_MAX)
Chuck Lever4eb68c22009-04-23 19:31:40 -04001045 return -EINVAL;
1046
1047 err = nfsd_create_serv();
1048 if (err != 0)
1049 return err;
1050
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +04001051 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever4eb68c22009-04-23 19:31:40 -04001052 PF_INET, port, SVC_SOCK_ANONYMOUS);
Chuck Lever68717902010-01-26 14:04:13 -05001053 if (err < 0)
Chuck Lever37498292010-01-26 14:04:22 -05001054 goto out_err;
1055
Pavel Emelyanovfc5d00b2010-09-29 16:03:50 +04001056 err = svc_create_xprt(nfsd_serv, transport, &init_net,
Chuck Lever37498292010-01-26 14:04:22 -05001057 PF_INET6, port, SVC_SOCK_ANONYMOUS);
1058 if (err < 0 && err != -EAFNOSUPPORT)
1059 goto out_close;
Jeff Layton0cd14a02010-07-19 16:50:06 -04001060
1061 /* Decrease the count, but don't shut down the service */
1062 nfsd_serv->sv_nrthreads--;
Chuck Lever4eb68c22009-04-23 19:31:40 -04001063 return 0;
Chuck Lever37498292010-01-26 14:04:22 -05001064out_close:
1065 xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
1066 if (xprt != NULL) {
1067 svc_close_xprt(xprt);
1068 svc_xprt_put(xprt);
1069 }
1070out_err:
Jeff Layton0cd14a02010-07-19 16:50:06 -04001071 svc_destroy(nfsd_serv);
Chuck Lever37498292010-01-26 14:04:22 -05001072 return err;
Chuck Lever4eb68c22009-04-23 19:31:40 -04001073}
1074
1075/*
Chuck Lever4cd5dc72009-04-23 19:31:32 -04001076 * A transport listener is removed by writing a "-", it's transport
1077 * name, and it's port number.
1078 */
1079static ssize_t __write_ports_delxprt(char *buf)
1080{
1081 struct svc_xprt *xprt;
1082 char transport[16];
1083 int port;
1084
1085 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
1086 return -EINVAL;
1087
Alexey Dobriyan4be929b2010-05-24 14:33:03 -07001088 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
Chuck Lever4cd5dc72009-04-23 19:31:32 -04001089 return -EINVAL;
1090
1091 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
1092 if (xprt == NULL)
1093 return -ENOTCONN;
1094
1095 svc_close_xprt(xprt);
1096 svc_xprt_put(xprt);
1097 return 0;
1098}
1099
Neil Brownbedbdd82008-06-10 08:40:35 -04001100static ssize_t __write_ports(struct file *file, char *buf, size_t size)
NeilBrown80212d52006-10-02 02:17:47 -07001101{
Chuck Lever0a5372d2009-04-23 19:32:10 -04001102 if (size == 0)
1103 return __write_ports_names(buf);
Chuck Lever0b7c2f62009-04-23 19:31:55 -04001104
1105 if (isdigit(buf[0]))
1106 return __write_ports_addfd(buf);
Chuck Lever82d56592009-04-23 19:31:48 -04001107
1108 if (buf[0] == '-' && isdigit(buf[1]))
1109 return __write_ports_delfd(buf);
Chuck Lever4eb68c22009-04-23 19:31:40 -04001110
1111 if (isalpha(buf[0]))
1112 return __write_ports_addxprt(buf);
Chuck Lever4cd5dc72009-04-23 19:31:32 -04001113
1114 if (buf[0] == '-' && isalpha(buf[1]))
1115 return __write_ports_delxprt(buf);
1116
NeilBrownb41b66d2006-10-02 02:17:48 -07001117 return -EINVAL;
NeilBrown80212d52006-10-02 02:17:47 -07001118}
1119
Chuck Lever262a0982008-12-12 16:57:35 -05001120/**
1121 * write_ports - Pass a socket file descriptor or transport name to listen on
1122 *
1123 * Input:
1124 * buf: ignored
1125 * size: zero
1126 * Output:
1127 * On success: passed-in buffer filled with a '\n'-terminated C
1128 * string containing a whitespace-separated list of
1129 * named NFSD listeners;
1130 * return code is the size in bytes of the string
1131 * On error: return code is zero or a negative errno value
1132 *
1133 * OR
1134 *
1135 * Input:
1136 * buf: C string containing an unsigned
1137 * integer value representing a bound
1138 * but unconnected socket that is to be
Chuck Leverc71206a2009-04-23 19:32:03 -04001139 * used as an NFSD listener; listen(3)
1140 * must be called for a SOCK_STREAM
1141 * socket, otherwise it is ignored
Chuck Lever262a0982008-12-12 16:57:35 -05001142 * size: non-zero length of C string in @buf
1143 * Output:
1144 * On success: NFS service is started;
1145 * passed-in buffer filled with a '\n'-terminated C
1146 * string containing a unique alphanumeric name of
1147 * the listener;
1148 * return code is the size in bytes of the string
1149 * On error: return code is a negative errno value
1150 *
1151 * OR
1152 *
1153 * Input:
1154 * buf: C string containing a "-" followed
1155 * by an integer value representing a
1156 * previously passed in socket file
1157 * descriptor
1158 * size: non-zero length of C string in @buf
1159 * Output:
1160 * On success: NFS service no longer listens on that socket;
1161 * passed-in buffer filled with a '\n'-terminated C
1162 * string containing a unique name of the listener;
1163 * return code is the size in bytes of the string
1164 * On error: return code is a negative errno value
1165 *
1166 * OR
1167 *
1168 * Input:
1169 * buf: C string containing a transport
1170 * name and an unsigned integer value
1171 * representing the port to listen on,
1172 * separated by whitespace
1173 * size: non-zero length of C string in @buf
1174 * Output:
1175 * On success: returns zero; NFS service is started
1176 * On error: return code is a negative errno value
1177 *
1178 * OR
1179 *
1180 * Input:
1181 * buf: C string containing a "-" followed
1182 * by a transport name and an unsigned
1183 * integer value representing the port
1184 * to listen on, separated by whitespace
1185 * size: non-zero length of C string in @buf
1186 * Output:
1187 * On success: returns zero; NFS service no longer listens
1188 * on that transport
1189 * On error: return code is a negative errno value
1190 */
Neil Brownbedbdd82008-06-10 08:40:35 -04001191static ssize_t write_ports(struct file *file, char *buf, size_t size)
1192{
1193 ssize_t rv;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001194
Neil Brownbedbdd82008-06-10 08:40:35 -04001195 mutex_lock(&nfsd_mutex);
1196 rv = __write_ports(file, buf, size);
1197 mutex_unlock(&nfsd_mutex);
1198 return rv;
1199}
1200
1201
NeilBrown596bbe52006-10-04 02:15:48 -07001202int nfsd_max_blksize;
1203
Chuck Lever262a0982008-12-12 16:57:35 -05001204/**
1205 * write_maxblksize - Set or report the current NFS blksize
1206 *
1207 * Input:
1208 * buf: ignored
1209 * size: zero
1210 *
1211 * OR
1212 *
1213 * Input:
1214 * buf: C string containing an unsigned
1215 * integer value representing the new
1216 * NFS blksize
1217 * size: non-zero length of C string in @buf
1218 * Output:
1219 * On success: passed-in buffer filled with '\n'-terminated C string
1220 * containing numeric value of the current NFS blksize
1221 * setting;
1222 * return code is the size in bytes of the string
1223 * On error: return code is zero or a negative errno value
1224 */
NeilBrown596bbe52006-10-04 02:15:48 -07001225static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
1226{
1227 char *mesg = buf;
1228 if (size > 0) {
1229 int bsize;
1230 int rv = get_int(&mesg, &bsize);
1231 if (rv)
1232 return rv;
1233 /* force bsize into allowed range and
1234 * required alignment.
1235 */
1236 if (bsize < 1024)
1237 bsize = 1024;
1238 if (bsize > NFSSVC_MAXBLKSIZE)
1239 bsize = NFSSVC_MAXBLKSIZE;
1240 bsize &= ~(1024-1);
Neil Brownbedbdd82008-06-10 08:40:35 -04001241 mutex_lock(&nfsd_mutex);
J. Bruce Fields7fa53cc2010-08-06 18:00:33 -04001242 if (nfsd_serv) {
Neil Brownbedbdd82008-06-10 08:40:35 -04001243 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -07001244 return -EBUSY;
1245 }
1246 nfsd_max_blksize = bsize;
Neil Brownbedbdd82008-06-10 08:40:35 -04001247 mutex_unlock(&nfsd_mutex);
NeilBrown596bbe52006-10-04 02:15:48 -07001248 }
Chuck Levere06b6402009-04-23 19:33:25 -04001249
1250 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
1251 nfsd_max_blksize);
NeilBrown596bbe52006-10-04 02:15:48 -07001252}
1253
NeilBrown70c3b762005-11-07 01:00:25 -08001254#ifdef CONFIG_NFSD_V4
J. Bruce Fieldsf0135742010-03-01 19:32:36 -05001255static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 char *mesg = buf;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -05001258 int rv, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
1260 if (size > 0) {
Jeff Layton3dd98a32008-06-10 08:40:36 -04001261 if (nfsd_serv)
1262 return -EBUSY;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -05001263 rv = get_int(&mesg, &i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 if (rv)
1265 return rv;
J. Bruce Fieldse7b184f2010-03-02 11:18:40 -05001266 /*
1267 * Some sanity checking. We don't have a reason for
1268 * these particular numbers, but problems with the
1269 * extremes are:
1270 * - Too short: the briefest network outage may
1271 * cause clients to lose all their locks. Also,
1272 * the frequent polling may be wasteful.
1273 * - Too long: do you really want reboot recovery
1274 * to take more than an hour? Or to make other
1275 * clients wait an hour before being able to
1276 * revoke a dead client's locks?
1277 */
J. Bruce Fieldsf0135742010-03-01 19:32:36 -05001278 if (i < 10 || i > 3600)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 return -EINVAL;
J. Bruce Fieldsf0135742010-03-01 19:32:36 -05001280 *time = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 }
Chuck Levere06b6402009-04-23 19:33:25 -04001282
J. Bruce Fieldsf0135742010-03-01 19:32:36 -05001283 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
1284}
1285
1286static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
1287{
1288 ssize_t rv;
1289
1290 mutex_lock(&nfsd_mutex);
1291 rv = __nfsd4_write_time(file, buf, size, time);
1292 mutex_unlock(&nfsd_mutex);
1293 return rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294}
1295
Chuck Lever262a0982008-12-12 16:57:35 -05001296/**
1297 * write_leasetime - Set or report the current NFSv4 lease time
1298 *
1299 * Input:
1300 * buf: ignored
1301 * size: zero
1302 *
1303 * OR
1304 *
1305 * Input:
1306 * buf: C string containing an unsigned
1307 * integer value representing the new
1308 * NFSv4 lease expiry time
1309 * size: non-zero length of C string in @buf
1310 * Output:
1311 * On success: passed-in buffer filled with '\n'-terminated C
1312 * string containing unsigned integer value of the
1313 * current lease expiry time;
1314 * return code is the size in bytes of the string
1315 * On error: return code is zero or a negative errno value
1316 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001317static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
1318{
J. Bruce Fieldsf0135742010-03-01 19:32:36 -05001319 return nfsd4_write_time(file, buf, size, &nfsd4_lease);
Jeff Layton3dd98a32008-06-10 08:40:36 -04001320}
1321
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -05001322/**
1323 * write_gracetime - Set or report current NFSv4 grace period time
1324 *
1325 * As above, but sets the time of the NFSv4 grace period.
1326 *
1327 * Note this should never be set to less than the *previous*
1328 * lease-period time, but we don't try to enforce this. (In the common
1329 * case (a new boot), we don't know what the previous lease time was
1330 * anyway.)
1331 */
1332static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
1333{
1334 return nfsd4_write_time(file, buf, size, &nfsd4_grace);
1335}
1336
Jeff Layton3dd98a32008-06-10 08:40:36 -04001337extern char *nfs4_recoverydir(void);
1338
1339static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
NeilBrown0964a3d2005-06-23 22:04:32 -07001340{
1341 char *mesg = buf;
1342 char *recdir;
1343 int len, status;
1344
Jeff Layton3dd98a32008-06-10 08:40:36 -04001345 if (size > 0) {
1346 if (nfsd_serv)
1347 return -EBUSY;
1348 if (size > PATH_MAX || buf[size-1] != '\n')
1349 return -EINVAL;
1350 buf[size-1] = 0;
NeilBrown0964a3d2005-06-23 22:04:32 -07001351
Jeff Layton3dd98a32008-06-10 08:40:36 -04001352 recdir = mesg;
1353 len = qword_get(&mesg, recdir, size);
1354 if (len <= 0)
1355 return -EINVAL;
NeilBrown0964a3d2005-06-23 22:04:32 -07001356
Jeff Layton3dd98a32008-06-10 08:40:36 -04001357 status = nfs4_reset_recoverydir(recdir);
Andi Kleen69049962010-07-20 15:24:27 -07001358 if (status)
1359 return status;
Jeff Layton3dd98a32008-06-10 08:40:36 -04001360 }
Chuck Lever3d72ab82009-04-23 19:33:10 -04001361
1362 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1363 nfs4_recoverydir());
NeilBrown0964a3d2005-06-23 22:04:32 -07001364}
Jeff Layton3dd98a32008-06-10 08:40:36 -04001365
Chuck Lever262a0982008-12-12 16:57:35 -05001366/**
1367 * write_recoverydir - Set or report the pathname of the recovery directory
1368 *
1369 * Input:
1370 * buf: ignored
1371 * size: zero
1372 *
1373 * OR
1374 *
1375 * Input:
1376 * buf: C string containing the pathname
1377 * of the directory on a local file
1378 * system containing permanent NFSv4
1379 * recovery data
1380 * size: non-zero length of C string in @buf
1381 * Output:
1382 * On success: passed-in buffer filled with '\n'-terminated C string
1383 * containing the current recovery pathname setting;
1384 * return code is the size in bytes of the string
1385 * On error: return code is zero or a negative errno value
1386 */
Jeff Layton3dd98a32008-06-10 08:40:36 -04001387static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1388{
1389 ssize_t rv;
1390
1391 mutex_lock(&nfsd_mutex);
1392 rv = __write_recoverydir(file, buf, size);
1393 mutex_unlock(&nfsd_mutex);
1394 return rv;
1395}
1396
NeilBrown70c3b762005-11-07 01:00:25 -08001397#endif
NeilBrown0964a3d2005-06-23 22:04:32 -07001398
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399/*----------------------------------------------------------------------------*/
1400/*
1401 * populating the filesystem.
1402 */
1403
1404static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1405{
1406 static struct tree_descr nfsd_files[] = {
NeilBrown1e140562010-09-22 12:55:07 +10001407#ifdef CONFIG_NFSD_DEPRECATED
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
1409 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
1410 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
1411 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
1412 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
1413 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
1414 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown1e140562010-09-22 12:55:07 +10001415#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
J. Bruce Fieldse8e87532009-12-14 12:53:32 -05001417 [NFSD_Export_features] = {"export_features",
1418 &export_features_operations, S_IRUGO},
Wendy Cheng4373ea82008-01-17 11:10:12 -05001419 [NFSD_FO_UnlockIP] = {"unlock_ip",
1420 &transaction_ops, S_IWUSR|S_IRUSR},
Wendy Cheng17efa372008-01-17 11:10:12 -05001421 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1422 &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1424 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Bankseed29652006-10-02 02:18:02 -07001425 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
Greg Banks03cf6c92009-01-13 21:26:36 +11001426 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
NeilBrown70c3b762005-11-07 01:00:25 -08001427 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown80212d52006-10-02 02:17:47 -07001428 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
NeilBrown596bbe52006-10-04 02:15:48 -07001429 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
J. Bruce Fields0a5e5f12011-03-14 20:57:44 -04001430#ifdef CONFIG_SUNRPC_GSS
Kevin Coffmanb0b0c0a2011-03-02 19:51:42 -05001431 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
J. Bruce Fields0a5e5f12011-03-14 20:57:44 -04001432#endif /* CONFIG_SUNRPC_GSS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433#ifdef CONFIG_NFSD_V4
1434 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
J. Bruce Fieldsefc4bb42010-03-02 11:04:06 -05001435 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
NeilBrown0964a3d2005-06-23 22:04:32 -07001436 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437#endif
1438 /* last one */ {""}
1439 };
1440 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1441}
1442
Al Virofc14f2f2010-07-25 01:48:30 +04001443static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1444 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445{
Al Virofc14f2f2010-07-25 01:48:30 +04001446 return mount_single(fs_type, flags, data, nfsd_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447}
1448
1449static struct file_system_type nfsd_fs_type = {
1450 .owner = THIS_MODULE,
1451 .name = "nfsd",
Al Virofc14f2f2010-07-25 01:48:30 +04001452 .mount = nfsd_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 .kill_sb = kill_litter_super,
1454};
1455
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001456#ifdef CONFIG_PROC_FS
1457static int create_proc_exports_entry(void)
1458{
1459 struct proc_dir_entry *entry;
1460
1461 entry = proc_mkdir("fs/nfs", NULL);
1462 if (!entry)
1463 return -ENOMEM;
Denis V. Lunev9ef2db22008-04-29 01:02:04 -07001464 entry = proc_create("exports", 0, entry, &exports_operations);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001465 if (!entry)
1466 return -ENOMEM;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001467 return 0;
1468}
1469#else /* CONFIG_PROC_FS */
1470static int create_proc_exports_entry(void)
1471{
1472 return 0;
1473}
1474#endif
1475
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476static int __init init_nfsd(void)
1477{
1478 int retval;
1479 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1480
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001481 retval = nfs4_state_init(); /* nfs4 locking state */
1482 if (retval)
1483 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 nfsd_stat_init(); /* Statistics */
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001485 retval = nfsd_reply_cache_init();
1486 if (retval)
1487 goto out_free_stat;
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001488 retval = nfsd_export_init();
1489 if (retval)
1490 goto out_free_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 nfsd_lockd_init(); /* lockd->nfsd callbacks */
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001492 retval = nfsd_idmap_init();
1493 if (retval)
1494 goto out_free_lockd;
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001495 retval = create_proc_exports_entry();
1496 if (retval)
1497 goto out_free_idmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 retval = register_filesystem(&nfsd_fs_type);
J. Bruce Fields26808d32007-11-09 13:44:06 -05001499 if (retval)
1500 goto out_free_all;
1501 return 0;
1502out_free_all:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001503 remove_proc_entry("fs/nfs/exports", NULL);
1504 remove_proc_entry("fs/nfs", NULL);
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001505out_free_idmap:
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001506 nfsd_idmap_shutdown();
1507out_free_lockd:
J. Bruce Fields26808d32007-11-09 13:44:06 -05001508 nfsd_lockd_shutdown();
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001509 nfsd_export_shutdown();
J. Bruce Fieldsdbf847e2007-11-08 17:20:34 -05001510out_free_cache:
J. Bruce Fieldse331f602007-11-12 17:32:21 -05001511 nfsd_reply_cache_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001512out_free_stat:
1513 nfsd_stat_shutdown();
J. Bruce Fields26808d32007-11-09 13:44:06 -05001514 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 return retval;
1516}
1517
1518static void __exit exit_nfsd(void)
1519{
1520 nfsd_export_shutdown();
J. Bruce Fieldsd5c34282007-11-09 14:10:56 -05001521 nfsd_reply_cache_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 remove_proc_entry("fs/nfs/exports", NULL);
1523 remove_proc_entry("fs/nfs", NULL);
1524 nfsd_stat_shutdown();
1525 nfsd_lockd_shutdown();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 nfsd_idmap_shutdown();
J. Bruce Fieldse8ff2a82007-08-01 15:30:59 -04001527 nfsd4_free_slabs();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 unregister_filesystem(&nfsd_fs_type);
1529}
1530
1531MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1532MODULE_LICENSE("GPL");
1533module_init(init_nfsd)
1534module_exit(exit_nfsd)