2 * linux/fs/nfsd/nfsctl.c
4 * Syscall interface to knfsd.
6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
9 #include <linux/module.h>
11 #include <linux/linkage.h>
12 #include <linux/time.h>
13 #include <linux/errno.h>
15 #include <linux/namei.h>
16 #include <linux/fcntl.h>
17 #include <linux/net.h>
19 #include <linux/syscalls.h>
20 #include <linux/unistd.h>
21 #include <linux/slab.h>
22 #include <linux/proc_fs.h>
23 #include <linux/seq_file.h>
24 #include <linux/pagemap.h>
25 #include <linux/init.h>
26 #include <linux/inet.h>
27 #include <linux/string.h>
28 #include <linux/smp_lock.h>
29 #include <linux/ctype.h>
31 #include <linux/nfs.h>
32 #include <linux/nfsd_idmap.h>
33 #include <linux/lockd/bind.h>
34 #include <linux/sunrpc/svc.h>
35 #include <linux/sunrpc/svcsock.h>
36 #include <linux/nfsd/nfsd.h>
37 #include <linux/nfsd/cache.h>
38 #include <linux/nfsd/xdr.h>
39 #include <linux/nfsd/syscall.h>
40 #include <linux/lockd/lockd.h>
42 #include <asm/uaccess.h>
46 * We have a single directory with 9 nodes in it.
68 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
69 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
78 * write() for these nodes.
80 static ssize_t
write_svc(struct file
*file
, char *buf
, size_t size
);
81 static ssize_t
write_add(struct file
*file
, char *buf
, size_t size
);
82 static ssize_t
write_del(struct file
*file
, char *buf
, size_t size
);
83 static ssize_t
write_export(struct file
*file
, char *buf
, size_t size
);
84 static ssize_t
write_unexport(struct file
*file
, char *buf
, size_t size
);
85 static ssize_t
write_getfd(struct file
*file
, char *buf
, size_t size
);
86 static ssize_t
write_getfs(struct file
*file
, char *buf
, size_t size
);
87 static ssize_t
write_filehandle(struct file
*file
, char *buf
, size_t size
);
88 static ssize_t
write_unlock_ip(struct file
*file
, char *buf
, size_t size
);
89 static ssize_t
write_unlock_fs(struct file
*file
, char *buf
, size_t size
);
90 static ssize_t
write_threads(struct file
*file
, char *buf
, size_t size
);
91 static ssize_t
write_pool_threads(struct file
*file
, char *buf
, size_t size
);
92 static ssize_t
write_versions(struct file
*file
, char *buf
, size_t size
);
93 static ssize_t
write_ports(struct file
*file
, char *buf
, size_t size
);
94 static ssize_t
write_maxblksize(struct file
*file
, char *buf
, size_t size
);
96 static ssize_t
write_leasetime(struct file
*file
, char *buf
, size_t size
);
97 static ssize_t
write_recoverydir(struct file
*file
, char *buf
, size_t size
);
100 static ssize_t (*write_op
[])(struct file
*, char *, size_t) = {
101 [NFSD_Svc
] = write_svc
,
102 [NFSD_Add
] = write_add
,
103 [NFSD_Del
] = write_del
,
104 [NFSD_Export
] = write_export
,
105 [NFSD_Unexport
] = write_unexport
,
106 [NFSD_Getfd
] = write_getfd
,
107 [NFSD_Getfs
] = write_getfs
,
108 [NFSD_Fh
] = write_filehandle
,
109 [NFSD_FO_UnlockIP
] = write_unlock_ip
,
110 [NFSD_FO_UnlockFS
] = write_unlock_fs
,
111 [NFSD_Threads
] = write_threads
,
112 [NFSD_Pool_Threads
] = write_pool_threads
,
113 [NFSD_Versions
] = write_versions
,
114 [NFSD_Ports
] = write_ports
,
115 [NFSD_MaxBlkSize
] = write_maxblksize
,
116 #ifdef CONFIG_NFSD_V4
117 [NFSD_Leasetime
] = write_leasetime
,
118 [NFSD_RecoveryDir
] = write_recoverydir
,
122 static ssize_t
nfsctl_transaction_write(struct file
*file
, const char __user
*buf
, size_t size
, loff_t
*pos
)
124 ino_t ino
= file
->f_path
.dentry
->d_inode
->i_ino
;
128 if (ino
>= ARRAY_SIZE(write_op
) || !write_op
[ino
])
131 data
= simple_transaction_get(file
, buf
, size
);
133 return PTR_ERR(data
);
135 rv
= write_op
[ino
](file
, data
, size
);
137 simple_transaction_set(file
, rv
);
143 static ssize_t
nfsctl_transaction_read(struct file
*file
, char __user
*buf
, size_t size
, loff_t
*pos
)
145 if (! file
->private_data
) {
146 /* An attempt to read a transaction file without writing
147 * causes a 0-byte write so that the file can return
150 ssize_t rv
= nfsctl_transaction_write(file
, buf
, 0, pos
);
154 return simple_transaction_read(file
, buf
, size
, pos
);
157 static const struct file_operations transaction_ops
= {
158 .write
= nfsctl_transaction_write
,
159 .read
= nfsctl_transaction_read
,
160 .release
= simple_transaction_release
,
163 static int exports_open(struct inode
*inode
, struct file
*file
)
165 return seq_open(file
, &nfs_exports_op
);
168 static const struct file_operations exports_operations
= {
169 .open
= exports_open
,
172 .release
= seq_release
,
173 .owner
= THIS_MODULE
,
176 extern int nfsd_pool_stats_open(struct inode
*inode
, struct file
*file
);
178 static struct file_operations pool_stats_operations
= {
179 .open
= nfsd_pool_stats_open
,
182 .release
= seq_release
,
183 .owner
= THIS_MODULE
,
186 /*----------------------------------------------------------------------------*/
188 * payload - write methods
192 * write_svc - Start kernel's NFSD server
194 * Deprecated. /proc/fs/nfsd/threads is preferred.
195 * Function remains to support old versions of nfs-utils.
198 * buf: struct nfsctl_svc
199 * svc_port: port number of this
201 * svc_nthreads: number of threads to start
202 * size: size in bytes of passed in nfsctl_svc
204 * On success: returns zero
205 * On error: return code is negative errno value
207 static ssize_t
write_svc(struct file
*file
, char *buf
, size_t size
)
209 struct nfsctl_svc
*data
;
210 if (size
< sizeof(*data
))
212 data
= (struct nfsctl_svc
*) buf
;
213 return nfsd_svc(data
->svc_port
, data
->svc_nthreads
);
217 * write_add - Add or modify client entry in auth unix cache
219 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
220 * Function remains to support old versions of nfs-utils.
223 * buf: struct nfsctl_client
224 * cl_ident: '\0'-terminated C string
225 * containing domain name
227 * cl_naddr: no. of items in cl_addrlist
228 * cl_addrlist: array of client addresses
229 * cl_fhkeytype: ignored
230 * cl_fhkeylen: ignored
232 * size: size in bytes of passed in nfsctl_client
234 * On success: returns zero
235 * On error: return code is negative errno value
237 * Note: Only AF_INET client addresses are passed in, since
238 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
240 static ssize_t
write_add(struct file
*file
, char *buf
, size_t size
)
242 struct nfsctl_client
*data
;
243 if (size
< sizeof(*data
))
245 data
= (struct nfsctl_client
*)buf
;
246 return exp_addclient(data
);
250 * write_del - Remove client from auth unix cache
252 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
253 * Function remains to support old versions of nfs-utils.
256 * buf: struct nfsctl_client
257 * cl_ident: '\0'-terminated C string
258 * containing domain name
261 * cl_addrlist: ignored
262 * cl_fhkeytype: ignored
263 * cl_fhkeylen: ignored
265 * size: size in bytes of passed in nfsctl_client
267 * On success: returns zero
268 * On error: return code is negative errno value
270 * Note: Only AF_INET client addresses are passed in, since
271 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
273 static ssize_t
write_del(struct file
*file
, char *buf
, size_t size
)
275 struct nfsctl_client
*data
;
276 if (size
< sizeof(*data
))
278 data
= (struct nfsctl_client
*)buf
;
279 return exp_delclient(data
);
283 * write_export - Export part or all of a local file system
285 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
286 * Function remains to support old versions of nfs-utils.
289 * buf: struct nfsctl_export
290 * ex_client: '\0'-terminated C string
291 * containing domain name
292 * of client allowed to access
294 * ex_path: '\0'-terminated C string
295 * containing pathname of
296 * directory in local file system
297 * ex_dev: fsid to use for this export
299 * ex_flags: export flags for this export
300 * ex_anon_uid: UID to use for anonymous
302 * ex_anon_gid: GID to use for anonymous
304 * size: size in bytes of passed in nfsctl_export
306 * On success: returns zero
307 * On error: return code is negative errno value
309 static ssize_t
write_export(struct file
*file
, char *buf
, size_t size
)
311 struct nfsctl_export
*data
;
312 if (size
< sizeof(*data
))
314 data
= (struct nfsctl_export
*)buf
;
315 return exp_export(data
);
319 * write_unexport - Unexport a previously exported file system
321 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
322 * Function remains to support old versions of nfs-utils.
325 * buf: struct nfsctl_export
326 * ex_client: '\0'-terminated C string
327 * containing domain name
328 * of client no longer allowed
329 * to access this export
330 * ex_path: '\0'-terminated C string
331 * containing pathname of
332 * directory in local file system
336 * ex_anon_uid: ignored
337 * ex_anon_gid: ignored
338 * size: size in bytes of passed in nfsctl_export
340 * On success: returns zero
341 * On error: return code is negative errno value
343 static ssize_t
write_unexport(struct file
*file
, char *buf
, size_t size
)
345 struct nfsctl_export
*data
;
347 if (size
< sizeof(*data
))
349 data
= (struct nfsctl_export
*)buf
;
350 return exp_unexport(data
);
354 * write_getfs - Get a variable-length NFS file handle by path
356 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
357 * Function remains to support old versions of nfs-utils.
360 * buf: struct nfsctl_fsparm
361 * gd_addr: socket address of client
362 * gd_path: '\0'-terminated C string
363 * containing pathname of
364 * directory in local file system
365 * gd_maxlen: maximum size of returned file
367 * size: size in bytes of passed in nfsctl_fsparm
369 * On success: passed-in buffer filled with a knfsd_fh structure
370 * (a variable-length raw NFS file handle);
371 * return code is the size in bytes of the file handle
372 * On error: return code is negative errno value
374 * Note: Only AF_INET client addresses are passed in, since gd_addr
375 * is the same size as a struct sockaddr_in.
377 static ssize_t
write_getfs(struct file
*file
, char *buf
, size_t size
)
379 struct nfsctl_fsparm
*data
;
380 struct sockaddr_in
*sin
;
381 struct auth_domain
*clp
;
383 struct knfsd_fh
*res
;
386 if (size
< sizeof(*data
))
388 data
= (struct nfsctl_fsparm
*)buf
;
389 err
= -EPROTONOSUPPORT
;
390 if (data
->gd_addr
.sa_family
!= AF_INET
)
392 sin
= (struct sockaddr_in
*)&data
->gd_addr
;
393 if (data
->gd_maxlen
> NFS3_FHSIZE
)
394 data
->gd_maxlen
= NFS3_FHSIZE
;
396 res
= (struct knfsd_fh
*)buf
;
400 ipv6_addr_set_v4mapped(sin
->sin_addr
.s_addr
, &in6
);
402 clp
= auth_unix_lookup(&in6
);
406 err
= exp_rootfh(clp
, data
->gd_path
, res
, data
->gd_maxlen
);
407 auth_domain_put(clp
);
411 err
= res
->fh_size
+ offsetof(struct knfsd_fh
, fh_base
);
417 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
419 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
420 * Function remains to support old versions of nfs-utils.
423 * buf: struct nfsctl_fdparm
424 * gd_addr: socket address of client
425 * gd_path: '\0'-terminated C string
426 * containing pathname of
427 * directory in local file system
428 * gd_version: fdparm structure version
429 * size: size in bytes of passed in nfsctl_fdparm
431 * On success: passed-in buffer filled with nfsctl_res
432 * (a fixed-length raw NFS file handle);
433 * return code is the size in bytes of the file handle
434 * On error: return code is negative errno value
436 * Note: Only AF_INET client addresses are passed in, since gd_addr
437 * is the same size as a struct sockaddr_in.
439 static ssize_t
write_getfd(struct file
*file
, char *buf
, size_t size
)
441 struct nfsctl_fdparm
*data
;
442 struct sockaddr_in
*sin
;
443 struct auth_domain
*clp
;
449 if (size
< sizeof(*data
))
451 data
= (struct nfsctl_fdparm
*)buf
;
452 err
= -EPROTONOSUPPORT
;
453 if (data
->gd_addr
.sa_family
!= AF_INET
)
456 if (data
->gd_version
< 2 || data
->gd_version
> NFSSVC_MAXVERS
)
460 sin
= (struct sockaddr_in
*)&data
->gd_addr
;
463 ipv6_addr_set_v4mapped(sin
->sin_addr
.s_addr
, &in6
);
465 clp
= auth_unix_lookup(&in6
);
469 err
= exp_rootfh(clp
, data
->gd_path
, &fh
, NFS_FHSIZE
);
470 auth_domain_put(clp
);
475 memset(res
,0, NFS_FHSIZE
);
476 memcpy(res
, &fh
.fh_base
, fh
.fh_size
);
484 * write_unlock_ip - Release all locks used by a client
489 * buf: '\n'-terminated C string containing a
490 * presentation format IPv4 address
491 * size: length of C string in @buf
493 * On success: returns zero if all specified locks were released;
494 * returns one if one or more locks were not released
495 * On error: return code is negative errno value
497 * Note: Only AF_INET client addresses are passed in
499 static ssize_t
write_unlock_ip(struct file
*file
, char *buf
, size_t size
)
501 struct sockaddr_in sin
= {
502 .sin_family
= AF_INET
,
512 if (buf
[size
-1] != '\n')
516 if (qword_get(&buf
, fo_path
, size
) < 0)
519 /* get ipv4 address */
520 if (sscanf(fo_path
, "%u.%u.%u.%u%c", &b1
, &b2
, &b3
, &b4
, &c
) != 4)
522 if (b1
> 255 || b2
> 255 || b3
> 255 || b4
> 255)
524 sin
.sin_addr
.s_addr
= htonl((b1
<< 24) | (b2
<< 16) | (b3
<< 8) | b4
);
526 return nlmsvc_unlock_all_by_ip((struct sockaddr
*)&sin
);
530 * write_unlock_fs - Release all locks on a local file system
535 * buf: '\n'-terminated C string containing the
536 * absolute pathname of a local file system
537 * size: length of C string in @buf
539 * On success: returns zero if all specified locks were released;
540 * returns one if one or more locks were not released
541 * On error: return code is negative errno value
543 static ssize_t
write_unlock_fs(struct file
*file
, char *buf
, size_t size
)
553 if (buf
[size
-1] != '\n')
557 if (qword_get(&buf
, fo_path
, size
) < 0)
560 error
= kern_path(fo_path
, 0, &path
);
565 * XXX: Needs better sanity checking. Otherwise we could end up
566 * releasing locks on the wrong file system.
569 * 1. Does the path refer to a directory?
570 * 2. Is that directory a mount point, or
571 * 3. Is that directory the root of an exported file system?
573 error
= nlmsvc_unlock_all_by_sb(path
.mnt
->mnt_sb
);
580 * write_filehandle - Get a variable-length NFS file handle by path
582 * On input, the buffer contains a '\n'-terminated C string comprised of
583 * three alphanumeric words separated by whitespace. The string may
584 * contain escape sequences.
588 * domain: client domain name
589 * path: export pathname
590 * maxsize: numeric maximum size of
592 * size: length of C string in @buf
594 * On success: passed-in buffer filled with '\n'-terminated C
595 * string containing a ASCII hex text version
596 * of the NFS file handle;
597 * return code is the size in bytes of the string
598 * On error: return code is negative errno value
600 static ssize_t
write_filehandle(struct file
*file
, char *buf
, size_t size
)
603 int uninitialized_var(maxsize
);
606 struct auth_domain
*dom
;
612 if (buf
[size
-1] != '\n')
617 len
= qword_get(&mesg
, dname
, size
);
622 len
= qword_get(&mesg
, path
, size
);
626 len
= get_int(&mesg
, &maxsize
);
630 if (maxsize
< NFS_FHSIZE
)
632 if (maxsize
> NFS3_FHSIZE
)
633 maxsize
= NFS3_FHSIZE
;
635 if (qword_get(&mesg
, mesg
, size
)>0)
638 /* we have all the words, they are in buf.. */
639 dom
= unix_domain_find(dname
);
643 len
= exp_rootfh(dom
, path
, &fh
, maxsize
);
644 auth_domain_put(dom
);
649 len
= SIMPLE_TRANSACTION_LIMIT
;
650 qword_addhex(&mesg
, &len
, (char*)&fh
.fh_base
, fh
.fh_size
);
656 * write_threads - Start NFSD, or report the current number of running threads
662 * On success: passed-in buffer filled with '\n'-terminated C
663 * string numeric value representing the number of
664 * running NFSD threads;
665 * return code is the size in bytes of the string
666 * On error: return code is zero
671 * buf: C string containing an unsigned
672 * integer value representing the
673 * number of NFSD threads to start
674 * size: non-zero length of C string in @buf
676 * On success: NFS service is started;
677 * passed-in buffer filled with '\n'-terminated C
678 * string numeric value representing the number of
679 * running NFSD threads;
680 * return code is the size in bytes of the string
681 * On error: return code is zero or a negative errno value
683 static ssize_t
write_threads(struct file
*file
, char *buf
, size_t size
)
689 rv
= get_int(&mesg
, &newthreads
);
694 rv
= nfsd_svc(NFS_PORT
, newthreads
);
698 sprintf(buf
, "%d\n", nfsd_nrthreads());
703 * write_pool_threads - Set or report the current number of threads per pool
712 * buf: C string containing whitespace-
713 * separated unsigned integer values
714 * representing the number of NFSD
715 * threads to start in each pool
716 * size: non-zero length of C string in @buf
718 * On success: passed-in buffer filled with '\n'-terminated C
719 * string containing integer values representing the
720 * number of NFSD threads in each pool;
721 * return code is the size in bytes of the string
722 * On error: return code is zero or a negative errno value
724 static ssize_t
write_pool_threads(struct file
*file
, char *buf
, size_t size
)
726 /* if size > 0, look for an array of number of threads per node
727 * and apply them then write out number of threads per node as reply
736 mutex_lock(&nfsd_mutex
);
737 npools
= nfsd_nrpools();
740 * NFS is shut down. The admin can start it by
741 * writing to the threads file but NOT the pool_threads
742 * file, sorry. Report zero threads.
744 mutex_unlock(&nfsd_mutex
);
749 nthreads
= kcalloc(npools
, sizeof(int), GFP_KERNEL
);
751 if (nthreads
== NULL
)
755 for (i
= 0; i
< npools
; i
++) {
756 rv
= get_int(&mesg
, &nthreads
[i
]);
758 break; /* fewer numbers than pools */
760 goto out_free
; /* syntax error */
765 rv
= nfsd_set_nrthreads(i
, nthreads
);
770 rv
= nfsd_get_nrthreads(npools
, nthreads
);
775 size
= SIMPLE_TRANSACTION_LIMIT
;
776 for (i
= 0; i
< npools
&& size
> 0; i
++) {
777 snprintf(mesg
, size
, "%d%c", nthreads
[i
], (i
== npools
-1 ? '\n' : ' '));
783 mutex_unlock(&nfsd_mutex
);
788 mutex_unlock(&nfsd_mutex
);
792 static ssize_t
__write_versions(struct file
*file
, char *buf
, size_t size
)
802 /* Cannot change versions without updating
803 * nfsd_serv->sv_xdrsize, and reallocing
804 * rq_argp and rq_resp
807 if (buf
[size
-1] != '\n')
812 len
= qword_get(&mesg
, vers
, size
);
813 if (len
<= 0) return -EINVAL
;
816 if (sign
== '+' || sign
== '-')
817 num
= simple_strtol((vers
+1), NULL
, 0);
819 num
= simple_strtol(vers
, NULL
, 0);
824 nfsd_vers(num
, sign
== '-' ? NFSD_CLEAR
: NFSD_SET
);
831 } while ((len
= qword_get(&mesg
, vers
, size
)) > 0);
832 /* If all get turned off, turn them back on, as
833 * having no versions is BAD
835 nfsd_reset_versions();
837 /* Now write current state into reply buffer */
840 for (num
=2 ; num
<= 4 ; num
++)
841 if (nfsd_vers(num
, NFSD_AVAIL
)) {
842 len
+= sprintf(buf
+len
, "%s%c%d", sep
,
843 nfsd_vers(num
, NFSD_TEST
)?'+':'-',
847 len
+= sprintf(buf
+len
, "\n");
852 * write_versions - Set or report the available NFS protocol versions
858 * On success: passed-in buffer filled with '\n'-terminated C
859 * string containing positive or negative integer
860 * values representing the current status of each
862 * return code is the size in bytes of the string
863 * On error: return code is zero or a negative errno value
868 * buf: C string containing whitespace-
869 * separated positive or negative
870 * integer values representing NFS
871 * protocol versions to enable ("+n")
873 * size: non-zero length of C string in @buf
875 * On success: status of zero or more protocol versions has
876 * been updated; passed-in buffer filled with
877 * '\n'-terminated C string containing positive
878 * or negative integer values representing the
879 * current status of each protocol version;
880 * return code is the size in bytes of the string
881 * On error: return code is zero or a negative errno value
883 static ssize_t
write_versions(struct file
*file
, char *buf
, size_t size
)
887 mutex_lock(&nfsd_mutex
);
888 rv
= __write_versions(file
, buf
, size
);
889 mutex_unlock(&nfsd_mutex
);
893 static ssize_t
__write_ports(struct file
*file
, char *buf
, size_t size
)
899 len
= svc_xprt_names(nfsd_serv
, buf
, 0);
902 /* Either a single 'fd' number is written, in which
903 * case it must be for a socket of a supported family/protocol,
904 * and we use it as an nfsd socket, or
905 * A '-' followed by the 'name' of a socket in which case
906 * we close the socket.
908 if (isdigit(buf
[0])) {
912 err
= get_int(&mesg
, &fd
);
917 err
= nfsd_create_serv();
919 err
= svc_addsock(nfsd_serv
, fd
, buf
);
923 svc_sock_names(buf
+strlen(buf
)+1, nfsd_serv
, buf
);
925 /* Decrease the count, but don't shutdown the
928 nfsd_serv
->sv_nrthreads
--;
930 return err
< 0 ? err
: 0;
932 if (buf
[0] == '-' && isdigit(buf
[1])) {
933 char *toclose
= kstrdup(buf
+1, GFP_KERNEL
);
938 len
= svc_sock_names(buf
, nfsd_serv
, toclose
);
945 * Add a transport listener by writing it's transport name
947 if (isalpha(buf
[0])) {
951 if (sscanf(buf
, "%15s %4d", transport
, &port
) == 2) {
952 err
= nfsd_create_serv();
954 err
= svc_create_xprt(nfsd_serv
,
958 /* Give a reasonable perror msg for
959 * bad transport string */
960 err
= -EPROTONOSUPPORT
;
962 return err
< 0 ? err
: 0;
966 * Remove a transport by writing it's transport name and port number
968 if (buf
[0] == '-' && isalpha(buf
[1])) {
969 struct svc_xprt
*xprt
;
973 if (sscanf(&buf
[1], "%15s %4d", transport
, &port
) == 2) {
977 xprt
= svc_find_xprt(nfsd_serv
, transport
,
980 svc_close_xprt(xprt
);
986 return err
< 0 ? err
: 0;
993 * write_ports - Pass a socket file descriptor or transport name to listen on
999 * On success: passed-in buffer filled with a '\n'-terminated C
1000 * string containing a whitespace-separated list of
1001 * named NFSD listeners;
1002 * return code is the size in bytes of the string
1003 * On error: return code is zero or a negative errno value
1008 * buf: C string containing an unsigned
1009 * integer value representing a bound
1010 * but unconnected socket that is to be
1011 * used as an NFSD listener
1012 * size: non-zero length of C string in @buf
1014 * On success: NFS service is started;
1015 * passed-in buffer filled with a '\n'-terminated C
1016 * string containing a unique alphanumeric name of
1018 * return code is the size in bytes of the string
1019 * On error: return code is a negative errno value
1024 * buf: C string containing a "-" followed
1025 * by an integer value representing a
1026 * previously passed in socket file
1028 * size: non-zero length of C string in @buf
1030 * On success: NFS service no longer listens on that socket;
1031 * passed-in buffer filled with a '\n'-terminated C
1032 * string containing a unique name of the listener;
1033 * return code is the size in bytes of the string
1034 * On error: return code is a negative errno value
1039 * buf: C string containing a transport
1040 * name and an unsigned integer value
1041 * representing the port to listen on,
1042 * separated by whitespace
1043 * size: non-zero length of C string in @buf
1045 * On success: returns zero; NFS service is started
1046 * On error: return code is a negative errno value
1051 * buf: C string containing a "-" followed
1052 * by a transport name and an unsigned
1053 * integer value representing the port
1054 * to listen on, separated by whitespace
1055 * size: non-zero length of C string in @buf
1057 * On success: returns zero; NFS service no longer listens
1059 * On error: return code is a negative errno value
1061 static ssize_t
write_ports(struct file
*file
, char *buf
, size_t size
)
1065 mutex_lock(&nfsd_mutex
);
1066 rv
= __write_ports(file
, buf
, size
);
1067 mutex_unlock(&nfsd_mutex
);
1072 int nfsd_max_blksize
;
1075 * write_maxblksize - Set or report the current NFS blksize
1084 * buf: C string containing an unsigned
1085 * integer value representing the new
1087 * size: non-zero length of C string in @buf
1089 * On success: passed-in buffer filled with '\n'-terminated C string
1090 * containing numeric value of the current NFS blksize
1092 * return code is the size in bytes of the string
1093 * On error: return code is zero or a negative errno value
1095 static ssize_t
write_maxblksize(struct file
*file
, char *buf
, size_t size
)
1100 int rv
= get_int(&mesg
, &bsize
);
1103 /* force bsize into allowed range and
1104 * required alignment.
1108 if (bsize
> NFSSVC_MAXBLKSIZE
)
1109 bsize
= NFSSVC_MAXBLKSIZE
;
1111 mutex_lock(&nfsd_mutex
);
1112 if (nfsd_serv
&& nfsd_serv
->sv_nrthreads
) {
1113 mutex_unlock(&nfsd_mutex
);
1116 nfsd_max_blksize
= bsize
;
1117 mutex_unlock(&nfsd_mutex
);
1119 return sprintf(buf
, "%d\n", nfsd_max_blksize
);
1122 #ifdef CONFIG_NFSD_V4
1123 extern time_t nfs4_leasetime(void);
1125 static ssize_t
__write_leasetime(struct file
*file
, char *buf
, size_t size
)
1127 /* if size > 10 seconds, call
1128 * nfs4_reset_lease() then write out the new lease (seconds) as reply
1136 rv
= get_int(&mesg
, &lease
);
1139 if (lease
< 10 || lease
> 3600)
1141 nfs4_reset_lease(lease
);
1143 sprintf(buf
, "%ld\n", nfs4_lease_time());
1148 * write_leasetime - Set or report the current NFSv4 lease time
1157 * buf: C string containing an unsigned
1158 * integer value representing the new
1159 * NFSv4 lease expiry time
1160 * size: non-zero length of C string in @buf
1162 * On success: passed-in buffer filled with '\n'-terminated C
1163 * string containing unsigned integer value of the
1164 * current lease expiry time;
1165 * return code is the size in bytes of the string
1166 * On error: return code is zero or a negative errno value
1168 static ssize_t
write_leasetime(struct file
*file
, char *buf
, size_t size
)
1172 mutex_lock(&nfsd_mutex
);
1173 rv
= __write_leasetime(file
, buf
, size
);
1174 mutex_unlock(&nfsd_mutex
);
1178 extern char *nfs4_recoverydir(void);
1180 static ssize_t
__write_recoverydir(struct file
*file
, char *buf
, size_t size
)
1189 if (size
> PATH_MAX
|| buf
[size
-1] != '\n')
1194 len
= qword_get(&mesg
, recdir
, size
);
1198 status
= nfs4_reset_recoverydir(recdir
);
1200 sprintf(buf
, "%s\n", nfs4_recoverydir());
1205 * write_recoverydir - Set or report the pathname of the recovery directory
1214 * buf: C string containing the pathname
1215 * of the directory on a local file
1216 * system containing permanent NFSv4
1218 * size: non-zero length of C string in @buf
1220 * On success: passed-in buffer filled with '\n'-terminated C string
1221 * containing the current recovery pathname setting;
1222 * return code is the size in bytes of the string
1223 * On error: return code is zero or a negative errno value
1225 static ssize_t
write_recoverydir(struct file
*file
, char *buf
, size_t size
)
1229 mutex_lock(&nfsd_mutex
);
1230 rv
= __write_recoverydir(file
, buf
, size
);
1231 mutex_unlock(&nfsd_mutex
);
1237 /*----------------------------------------------------------------------------*/
1239 * populating the filesystem.
1242 static int nfsd_fill_super(struct super_block
* sb
, void * data
, int silent
)
1244 static struct tree_descr nfsd_files
[] = {
1245 [NFSD_Svc
] = {".svc", &transaction_ops
, S_IWUSR
},
1246 [NFSD_Add
] = {".add", &transaction_ops
, S_IWUSR
},
1247 [NFSD_Del
] = {".del", &transaction_ops
, S_IWUSR
},
1248 [NFSD_Export
] = {".export", &transaction_ops
, S_IWUSR
},
1249 [NFSD_Unexport
] = {".unexport", &transaction_ops
, S_IWUSR
},
1250 [NFSD_Getfd
] = {".getfd", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1251 [NFSD_Getfs
] = {".getfs", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1252 [NFSD_List
] = {"exports", &exports_operations
, S_IRUGO
},
1253 [NFSD_FO_UnlockIP
] = {"unlock_ip",
1254 &transaction_ops
, S_IWUSR
|S_IRUSR
},
1255 [NFSD_FO_UnlockFS
] = {"unlock_filesystem",
1256 &transaction_ops
, S_IWUSR
|S_IRUSR
},
1257 [NFSD_Fh
] = {"filehandle", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1258 [NFSD_Threads
] = {"threads", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1259 [NFSD_Pool_Threads
] = {"pool_threads", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1260 [NFSD_Pool_Stats
] = {"pool_stats", &pool_stats_operations
, S_IRUGO
},
1261 [NFSD_Versions
] = {"versions", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1262 [NFSD_Ports
] = {"portlist", &transaction_ops
, S_IWUSR
|S_IRUGO
},
1263 [NFSD_MaxBlkSize
] = {"max_block_size", &transaction_ops
, S_IWUSR
|S_IRUGO
},
1264 #ifdef CONFIG_NFSD_V4
1265 [NFSD_Leasetime
] = {"nfsv4leasetime", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1266 [NFSD_RecoveryDir
] = {"nfsv4recoverydir", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1270 return simple_fill_super(sb
, 0x6e667364, nfsd_files
);
1273 static int nfsd_get_sb(struct file_system_type
*fs_type
,
1274 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
1276 return get_sb_single(fs_type
, flags
, data
, nfsd_fill_super
, mnt
);
1279 static struct file_system_type nfsd_fs_type
= {
1280 .owner
= THIS_MODULE
,
1282 .get_sb
= nfsd_get_sb
,
1283 .kill_sb
= kill_litter_super
,
1286 #ifdef CONFIG_PROC_FS
1287 static int create_proc_exports_entry(void)
1289 struct proc_dir_entry
*entry
;
1291 entry
= proc_mkdir("fs/nfs", NULL
);
1294 entry
= proc_create("exports", 0, entry
, &exports_operations
);
1299 #else /* CONFIG_PROC_FS */
1300 static int create_proc_exports_entry(void)
1306 static int __init
init_nfsd(void)
1309 printk(KERN_INFO
"Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1311 retval
= nfs4_state_init(); /* nfs4 locking state */
1314 nfsd_stat_init(); /* Statistics */
1315 retval
= nfsd_reply_cache_init();
1318 retval
= nfsd_export_init();
1320 goto out_free_cache
;
1321 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1322 retval
= nfsd_idmap_init();
1324 goto out_free_lockd
;
1325 retval
= create_proc_exports_entry();
1327 goto out_free_idmap
;
1328 retval
= register_filesystem(&nfsd_fs_type
);
1333 remove_proc_entry("fs/nfs/exports", NULL
);
1334 remove_proc_entry("fs/nfs", NULL
);
1336 nfsd_idmap_shutdown();
1338 nfsd_lockd_shutdown();
1339 nfsd_export_shutdown();
1341 nfsd_reply_cache_shutdown();
1343 nfsd_stat_shutdown();
1348 static void __exit
exit_nfsd(void)
1350 nfsd_export_shutdown();
1351 nfsd_reply_cache_shutdown();
1352 remove_proc_entry("fs/nfs/exports", NULL
);
1353 remove_proc_entry("fs/nfs", NULL
);
1354 nfsd_stat_shutdown();
1355 nfsd_lockd_shutdown();
1356 nfsd_idmap_shutdown();
1358 unregister_filesystem(&nfsd_fs_type
);
1361 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1362 MODULE_LICENSE("GPL");
1363 module_init(init_nfsd
)
1364 module_exit(exit_nfsd
)