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.
67 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
68 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
77 * write() for these nodes.
79 static ssize_t
write_svc(struct file
*file
, char *buf
, size_t size
);
80 static ssize_t
write_add(struct file
*file
, char *buf
, size_t size
);
81 static ssize_t
write_del(struct file
*file
, char *buf
, size_t size
);
82 static ssize_t
write_export(struct file
*file
, char *buf
, size_t size
);
83 static ssize_t
write_unexport(struct file
*file
, char *buf
, size_t size
);
84 static ssize_t
write_getfd(struct file
*file
, char *buf
, size_t size
);
85 static ssize_t
write_getfs(struct file
*file
, char *buf
, size_t size
);
86 static ssize_t
write_filehandle(struct file
*file
, char *buf
, size_t size
);
87 static ssize_t
write_unlock_ip(struct file
*file
, char *buf
, size_t size
);
88 static ssize_t
write_unlock_fs(struct file
*file
, char *buf
, size_t size
);
89 static ssize_t
write_threads(struct file
*file
, char *buf
, size_t size
);
90 static ssize_t
write_pool_threads(struct file
*file
, char *buf
, size_t size
);
91 static ssize_t
write_versions(struct file
*file
, char *buf
, size_t size
);
92 static ssize_t
write_ports(struct file
*file
, char *buf
, size_t size
);
93 static ssize_t
write_maxblksize(struct file
*file
, char *buf
, size_t size
);
95 static ssize_t
write_leasetime(struct file
*file
, char *buf
, size_t size
);
96 static ssize_t
write_recoverydir(struct file
*file
, char *buf
, size_t size
);
99 static ssize_t (*write_op
[])(struct file
*, char *, size_t) = {
100 [NFSD_Svc
] = write_svc
,
101 [NFSD_Add
] = write_add
,
102 [NFSD_Del
] = write_del
,
103 [NFSD_Export
] = write_export
,
104 [NFSD_Unexport
] = write_unexport
,
105 [NFSD_Getfd
] = write_getfd
,
106 [NFSD_Getfs
] = write_getfs
,
107 [NFSD_Fh
] = write_filehandle
,
108 [NFSD_FO_UnlockIP
] = write_unlock_ip
,
109 [NFSD_FO_UnlockFS
] = write_unlock_fs
,
110 [NFSD_Threads
] = write_threads
,
111 [NFSD_Pool_Threads
] = write_pool_threads
,
112 [NFSD_Versions
] = write_versions
,
113 [NFSD_Ports
] = write_ports
,
114 [NFSD_MaxBlkSize
] = write_maxblksize
,
115 #ifdef CONFIG_NFSD_V4
116 [NFSD_Leasetime
] = write_leasetime
,
117 [NFSD_RecoveryDir
] = write_recoverydir
,
121 static ssize_t
nfsctl_transaction_write(struct file
*file
, const char __user
*buf
, size_t size
, loff_t
*pos
)
123 ino_t ino
= file
->f_path
.dentry
->d_inode
->i_ino
;
127 if (ino
>= ARRAY_SIZE(write_op
) || !write_op
[ino
])
130 data
= simple_transaction_get(file
, buf
, size
);
132 return PTR_ERR(data
);
134 rv
= write_op
[ino
](file
, data
, size
);
136 simple_transaction_set(file
, rv
);
142 static ssize_t
nfsctl_transaction_read(struct file
*file
, char __user
*buf
, size_t size
, loff_t
*pos
)
144 if (! file
->private_data
) {
145 /* An attempt to read a transaction file without writing
146 * causes a 0-byte write so that the file can return
149 ssize_t rv
= nfsctl_transaction_write(file
, buf
, 0, pos
);
153 return simple_transaction_read(file
, buf
, size
, pos
);
156 static const struct file_operations transaction_ops
= {
157 .write
= nfsctl_transaction_write
,
158 .read
= nfsctl_transaction_read
,
159 .release
= simple_transaction_release
,
162 static int exports_open(struct inode
*inode
, struct file
*file
)
164 return seq_open(file
, &nfs_exports_op
);
167 static const struct file_operations exports_operations
= {
168 .open
= exports_open
,
171 .release
= seq_release
,
172 .owner
= THIS_MODULE
,
175 /*----------------------------------------------------------------------------*/
177 * payload - write methods
181 * write_svc - Start kernel's NFSD server
183 * Deprecated. /proc/fs/nfsd/threads is preferred.
184 * Function remains to support old versions of nfs-utils.
187 * buf: struct nfsctl_svc
188 * svc_port: port number of this
190 * svc_nthreads: number of threads to start
191 * size: size in bytes of passed in nfsctl_svc
193 * On success: returns zero
194 * On error: return code is negative errno value
196 static ssize_t
write_svc(struct file
*file
, char *buf
, size_t size
)
198 struct nfsctl_svc
*data
;
199 if (size
< sizeof(*data
))
201 data
= (struct nfsctl_svc
*) buf
;
202 return nfsd_svc(data
->svc_port
, data
->svc_nthreads
);
206 * write_add - Add or modify client entry in auth unix cache
208 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
209 * Function remains to support old versions of nfs-utils.
212 * buf: struct nfsctl_client
213 * cl_ident: '\0'-terminated C string
214 * containing domain name
216 * cl_naddr: no. of items in cl_addrlist
217 * cl_addrlist: array of client addresses
218 * cl_fhkeytype: ignored
219 * cl_fhkeylen: ignored
221 * size: size in bytes of passed in nfsctl_client
223 * On success: returns zero
224 * On error: return code is negative errno value
226 * Note: Only AF_INET client addresses are passed in, since
227 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
229 static ssize_t
write_add(struct file
*file
, char *buf
, size_t size
)
231 struct nfsctl_client
*data
;
232 if (size
< sizeof(*data
))
234 data
= (struct nfsctl_client
*)buf
;
235 return exp_addclient(data
);
239 * write_del - Remove client from auth unix cache
241 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
242 * Function remains to support old versions of nfs-utils.
245 * buf: struct nfsctl_client
246 * cl_ident: '\0'-terminated C string
247 * containing domain name
250 * cl_addrlist: ignored
251 * cl_fhkeytype: ignored
252 * cl_fhkeylen: ignored
254 * size: size in bytes of passed in nfsctl_client
256 * On success: returns zero
257 * On error: return code is negative errno value
259 * Note: Only AF_INET client addresses are passed in, since
260 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
262 static ssize_t
write_del(struct file
*file
, char *buf
, size_t size
)
264 struct nfsctl_client
*data
;
265 if (size
< sizeof(*data
))
267 data
= (struct nfsctl_client
*)buf
;
268 return exp_delclient(data
);
272 * write_export - Export part or all of a local file system
274 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
275 * Function remains to support old versions of nfs-utils.
278 * buf: struct nfsctl_export
279 * ex_client: '\0'-terminated C string
280 * containing domain name
281 * of client allowed to access
283 * ex_path: '\0'-terminated C string
284 * containing pathname of
285 * directory in local file system
286 * ex_dev: fsid to use for this export
288 * ex_flags: export flags for this export
289 * ex_anon_uid: UID to use for anonymous
291 * ex_anon_gid: GID to use for anonymous
293 * size: size in bytes of passed in nfsctl_export
295 * On success: returns zero
296 * On error: return code is negative errno value
298 static ssize_t
write_export(struct file
*file
, char *buf
, size_t size
)
300 struct nfsctl_export
*data
;
301 if (size
< sizeof(*data
))
303 data
= (struct nfsctl_export
*)buf
;
304 return exp_export(data
);
308 * write_unexport - Unexport a previously exported file system
310 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
311 * Function remains to support old versions of nfs-utils.
314 * buf: struct nfsctl_export
315 * ex_client: '\0'-terminated C string
316 * containing domain name
317 * of client no longer allowed
318 * to access this export
319 * ex_path: '\0'-terminated C string
320 * containing pathname of
321 * directory in local file system
325 * ex_anon_uid: ignored
326 * ex_anon_gid: ignored
327 * size: size in bytes of passed in nfsctl_export
329 * On success: returns zero
330 * On error: return code is negative errno value
332 static ssize_t
write_unexport(struct file
*file
, char *buf
, size_t size
)
334 struct nfsctl_export
*data
;
336 if (size
< sizeof(*data
))
338 data
= (struct nfsctl_export
*)buf
;
339 return exp_unexport(data
);
343 * write_getfs - Get a variable-length NFS file handle by path
345 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
346 * Function remains to support old versions of nfs-utils.
349 * buf: struct nfsctl_fsparm
350 * gd_addr: socket address of client
351 * gd_path: '\0'-terminated C string
352 * containing pathname of
353 * directory in local file system
354 * gd_maxlen: maximum size of returned file
356 * size: size in bytes of passed in nfsctl_fsparm
358 * On success: passed-in buffer filled with a knfsd_fh structure
359 * (a variable-length raw NFS file handle);
360 * return code is the size in bytes of the file handle
361 * On error: return code is negative errno value
363 * Note: Only AF_INET client addresses are passed in, since gd_addr
364 * is the same size as a struct sockaddr_in.
366 static ssize_t
write_getfs(struct file
*file
, char *buf
, size_t size
)
368 struct nfsctl_fsparm
*data
;
369 struct sockaddr_in
*sin
;
370 struct auth_domain
*clp
;
372 struct knfsd_fh
*res
;
375 if (size
< sizeof(*data
))
377 data
= (struct nfsctl_fsparm
*)buf
;
378 err
= -EPROTONOSUPPORT
;
379 if (data
->gd_addr
.sa_family
!= AF_INET
)
381 sin
= (struct sockaddr_in
*)&data
->gd_addr
;
382 if (data
->gd_maxlen
> NFS3_FHSIZE
)
383 data
->gd_maxlen
= NFS3_FHSIZE
;
385 res
= (struct knfsd_fh
*)buf
;
389 ipv6_addr_set_v4mapped(sin
->sin_addr
.s_addr
, &in6
);
391 clp
= auth_unix_lookup(&in6
);
395 err
= exp_rootfh(clp
, data
->gd_path
, res
, data
->gd_maxlen
);
396 auth_domain_put(clp
);
400 err
= res
->fh_size
+ offsetof(struct knfsd_fh
, fh_base
);
406 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
408 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
409 * Function remains to support old versions of nfs-utils.
412 * buf: struct nfsctl_fdparm
413 * gd_addr: socket address of client
414 * gd_path: '\0'-terminated C string
415 * containing pathname of
416 * directory in local file system
417 * gd_version: fdparm structure version
418 * size: size in bytes of passed in nfsctl_fdparm
420 * On success: passed-in buffer filled with nfsctl_res
421 * (a fixed-length raw NFS file handle);
422 * return code is the size in bytes of the file handle
423 * On error: return code is negative errno value
425 * Note: Only AF_INET client addresses are passed in, since gd_addr
426 * is the same size as a struct sockaddr_in.
428 static ssize_t
write_getfd(struct file
*file
, char *buf
, size_t size
)
430 struct nfsctl_fdparm
*data
;
431 struct sockaddr_in
*sin
;
432 struct auth_domain
*clp
;
438 if (size
< sizeof(*data
))
440 data
= (struct nfsctl_fdparm
*)buf
;
441 err
= -EPROTONOSUPPORT
;
442 if (data
->gd_addr
.sa_family
!= AF_INET
)
445 if (data
->gd_version
< 2 || data
->gd_version
> NFSSVC_MAXVERS
)
449 sin
= (struct sockaddr_in
*)&data
->gd_addr
;
452 ipv6_addr_set_v4mapped(sin
->sin_addr
.s_addr
, &in6
);
454 clp
= auth_unix_lookup(&in6
);
458 err
= exp_rootfh(clp
, data
->gd_path
, &fh
, NFS_FHSIZE
);
459 auth_domain_put(clp
);
464 memset(res
,0, NFS_FHSIZE
);
465 memcpy(res
, &fh
.fh_base
, fh
.fh_size
);
473 * write_unlock_ip - Release all locks used by a client
478 * buf: '\n'-terminated C string containing a
479 * presentation format IPv4 address
480 * size: length of C string in @buf
482 * On success: returns zero if all specified locks were released;
483 * returns one if one or more locks were not released
484 * On error: return code is negative errno value
486 * Note: Only AF_INET client addresses are passed in
488 static ssize_t
write_unlock_ip(struct file
*file
, char *buf
, size_t size
)
490 struct sockaddr_in sin
= {
491 .sin_family
= AF_INET
,
501 if (buf
[size
-1] != '\n')
505 if (qword_get(&buf
, fo_path
, size
) < 0)
508 /* get ipv4 address */
509 if (sscanf(fo_path
, "%u.%u.%u.%u%c", &b1
, &b2
, &b3
, &b4
, &c
) != 4)
511 if (b1
> 255 || b2
> 255 || b3
> 255 || b4
> 255)
513 sin
.sin_addr
.s_addr
= htonl((b1
<< 24) | (b2
<< 16) | (b3
<< 8) | b4
);
515 return nlmsvc_unlock_all_by_ip((struct sockaddr
*)&sin
);
519 * write_unlock_fs - Release all locks on a local file system
524 * buf: '\n'-terminated C string containing the
525 * absolute pathname of a local file system
526 * size: length of C string in @buf
528 * On success: returns zero if all specified locks were released;
529 * returns one if one or more locks were not released
530 * On error: return code is negative errno value
532 static ssize_t
write_unlock_fs(struct file
*file
, char *buf
, size_t size
)
542 if (buf
[size
-1] != '\n')
546 if (qword_get(&buf
, fo_path
, size
) < 0)
549 error
= kern_path(fo_path
, 0, &path
);
554 * XXX: Needs better sanity checking. Otherwise we could end up
555 * releasing locks on the wrong file system.
558 * 1. Does the path refer to a directory?
559 * 2. Is that directory a mount point, or
560 * 3. Is that directory the root of an exported file system?
562 error
= nlmsvc_unlock_all_by_sb(path
.mnt
->mnt_sb
);
569 * write_filehandle - Get a variable-length NFS file handle by path
571 * On input, the buffer contains a '\n'-terminated C string comprised of
572 * three alphanumeric words separated by whitespace. The string may
573 * contain escape sequences.
577 * domain: client domain name
578 * path: export pathname
579 * maxsize: numeric maximum size of
581 * size: length of C string in @buf
583 * On success: passed-in buffer filled with '\n'-terminated C
584 * string containing a ASCII hex text version
585 * of the NFS file handle;
586 * return code is the size in bytes of the string
587 * On error: return code is negative errno value
589 static ssize_t
write_filehandle(struct file
*file
, char *buf
, size_t size
)
592 int uninitialized_var(maxsize
);
595 struct auth_domain
*dom
;
601 if (buf
[size
-1] != '\n')
606 len
= qword_get(&mesg
, dname
, size
);
611 len
= qword_get(&mesg
, path
, size
);
615 len
= get_int(&mesg
, &maxsize
);
619 if (maxsize
< NFS_FHSIZE
)
621 if (maxsize
> NFS3_FHSIZE
)
622 maxsize
= NFS3_FHSIZE
;
624 if (qword_get(&mesg
, mesg
, size
)>0)
627 /* we have all the words, they are in buf.. */
628 dom
= unix_domain_find(dname
);
632 len
= exp_rootfh(dom
, path
, &fh
, maxsize
);
633 auth_domain_put(dom
);
638 len
= SIMPLE_TRANSACTION_LIMIT
;
639 qword_addhex(&mesg
, &len
, (char*)&fh
.fh_base
, fh
.fh_size
);
645 * write_threads - Start NFSD, or report the current number of running threads
651 * On success: passed-in buffer filled with '\n'-terminated C
652 * string numeric value representing the number of
653 * running NFSD threads;
654 * return code is the size in bytes of the string
655 * On error: return code is zero
660 * buf: C string containing an unsigned
661 * integer value representing the
662 * number of NFSD threads to start
663 * size: non-zero length of C string in @buf
665 * On success: NFS service is started;
666 * passed-in buffer filled with '\n'-terminated C
667 * string numeric value representing the number of
668 * running NFSD threads;
669 * return code is the size in bytes of the string
670 * On error: return code is zero or a negative errno value
672 static ssize_t
write_threads(struct file
*file
, char *buf
, size_t size
)
678 rv
= get_int(&mesg
, &newthreads
);
683 rv
= nfsd_svc(NFS_PORT
, newthreads
);
687 sprintf(buf
, "%d\n", nfsd_nrthreads());
692 * write_pool_threads - Set or report the current number of threads per pool
701 * buf: C string containing whitespace-
702 * separated unsigned integer values
703 * representing the number of NFSD
704 * threads to start in each pool
705 * size: non-zero length of C string in @buf
707 * On success: passed-in buffer filled with '\n'-terminated C
708 * string containing integer values representing the
709 * number of NFSD threads in each pool;
710 * return code is the size in bytes of the string
711 * On error: return code is zero or a negative errno value
713 static ssize_t
write_pool_threads(struct file
*file
, char *buf
, size_t size
)
715 /* if size > 0, look for an array of number of threads per node
716 * and apply them then write out number of threads per node as reply
725 mutex_lock(&nfsd_mutex
);
726 npools
= nfsd_nrpools();
729 * NFS is shut down. The admin can start it by
730 * writing to the threads file but NOT the pool_threads
731 * file, sorry. Report zero threads.
733 mutex_unlock(&nfsd_mutex
);
738 nthreads
= kcalloc(npools
, sizeof(int), GFP_KERNEL
);
740 if (nthreads
== NULL
)
744 for (i
= 0; i
< npools
; i
++) {
745 rv
= get_int(&mesg
, &nthreads
[i
]);
747 break; /* fewer numbers than pools */
749 goto out_free
; /* syntax error */
754 rv
= nfsd_set_nrthreads(i
, nthreads
);
759 rv
= nfsd_get_nrthreads(npools
, nthreads
);
764 size
= SIMPLE_TRANSACTION_LIMIT
;
765 for (i
= 0; i
< npools
&& size
> 0; i
++) {
766 snprintf(mesg
, size
, "%d%c", nthreads
[i
], (i
== npools
-1 ? '\n' : ' '));
772 mutex_unlock(&nfsd_mutex
);
777 mutex_unlock(&nfsd_mutex
);
781 static ssize_t
__write_versions(struct file
*file
, char *buf
, size_t size
)
791 /* Cannot change versions without updating
792 * nfsd_serv->sv_xdrsize, and reallocing
793 * rq_argp and rq_resp
796 if (buf
[size
-1] != '\n')
801 len
= qword_get(&mesg
, vers
, size
);
802 if (len
<= 0) return -EINVAL
;
805 if (sign
== '+' || sign
== '-')
806 num
= simple_strtol((vers
+1), NULL
, 0);
808 num
= simple_strtol(vers
, NULL
, 0);
813 nfsd_vers(num
, sign
== '-' ? NFSD_CLEAR
: NFSD_SET
);
820 } while ((len
= qword_get(&mesg
, vers
, size
)) > 0);
821 /* If all get turned off, turn them back on, as
822 * having no versions is BAD
824 nfsd_reset_versions();
826 /* Now write current state into reply buffer */
829 for (num
=2 ; num
<= 4 ; num
++)
830 if (nfsd_vers(num
, NFSD_AVAIL
)) {
831 len
+= sprintf(buf
+len
, "%s%c%d", sep
,
832 nfsd_vers(num
, NFSD_TEST
)?'+':'-',
836 len
+= sprintf(buf
+len
, "\n");
841 * write_versions - Set or report the available NFS protocol versions
847 * On success: passed-in buffer filled with '\n'-terminated C
848 * string containing positive or negative integer
849 * values representing the current status of each
851 * return code is the size in bytes of the string
852 * On error: return code is zero or a negative errno value
857 * buf: C string containing whitespace-
858 * separated positive or negative
859 * integer values representing NFS
860 * protocol versions to enable ("+n")
862 * size: non-zero length of C string in @buf
864 * On success: status of zero or more protocol versions has
865 * been updated; passed-in buffer filled with
866 * '\n'-terminated C string containing positive
867 * or negative integer values representing the
868 * current status of each protocol version;
869 * return code is the size in bytes of the string
870 * On error: return code is zero or a negative errno value
872 static ssize_t
write_versions(struct file
*file
, char *buf
, size_t size
)
876 mutex_lock(&nfsd_mutex
);
877 rv
= __write_versions(file
, buf
, size
);
878 mutex_unlock(&nfsd_mutex
);
882 static ssize_t
__write_ports(struct file
*file
, char *buf
, size_t size
)
888 len
= svc_xprt_names(nfsd_serv
, buf
, 0);
891 /* Either a single 'fd' number is written, in which
892 * case it must be for a socket of a supported family/protocol,
893 * and we use it as an nfsd socket, or
894 * A '-' followed by the 'name' of a socket in which case
895 * we close the socket.
897 if (isdigit(buf
[0])) {
901 err
= get_int(&mesg
, &fd
);
906 err
= nfsd_create_serv();
908 err
= svc_addsock(nfsd_serv
, fd
, buf
);
912 svc_sock_names(buf
+strlen(buf
)+1, nfsd_serv
, buf
);
914 /* Decrease the count, but don't shutdown the
917 nfsd_serv
->sv_nrthreads
--;
919 return err
< 0 ? err
: 0;
921 if (buf
[0] == '-' && isdigit(buf
[1])) {
922 char *toclose
= kstrdup(buf
+1, GFP_KERNEL
);
927 len
= svc_sock_names(buf
, nfsd_serv
, toclose
);
934 * Add a transport listener by writing it's transport name
936 if (isalpha(buf
[0])) {
940 if (sscanf(buf
, "%15s %4d", transport
, &port
) == 2) {
941 err
= nfsd_create_serv();
943 err
= svc_create_xprt(nfsd_serv
,
947 /* Give a reasonable perror msg for
948 * bad transport string */
949 err
= -EPROTONOSUPPORT
;
951 return err
< 0 ? err
: 0;
955 * Remove a transport by writing it's transport name and port number
957 if (buf
[0] == '-' && isalpha(buf
[1])) {
958 struct svc_xprt
*xprt
;
962 if (sscanf(&buf
[1], "%15s %4d", transport
, &port
) == 2) {
966 xprt
= svc_find_xprt(nfsd_serv
, transport
,
969 svc_close_xprt(xprt
);
975 return err
< 0 ? err
: 0;
982 * write_ports - Pass a socket file descriptor or transport name to listen on
988 * On success: passed-in buffer filled with a '\n'-terminated C
989 * string containing a whitespace-separated list of
990 * named NFSD listeners;
991 * return code is the size in bytes of the string
992 * On error: return code is zero or a negative errno value
997 * buf: C string containing an unsigned
998 * integer value representing a bound
999 * but unconnected socket that is to be
1000 * used as an NFSD listener
1001 * size: non-zero length of C string in @buf
1003 * On success: NFS service is started;
1004 * passed-in buffer filled with a '\n'-terminated C
1005 * string containing a unique alphanumeric name of
1007 * return code is the size in bytes of the string
1008 * On error: return code is a negative errno value
1013 * buf: C string containing a "-" followed
1014 * by an integer value representing a
1015 * previously passed in socket file
1017 * size: non-zero length of C string in @buf
1019 * On success: NFS service no longer listens on that socket;
1020 * passed-in buffer filled with a '\n'-terminated C
1021 * string containing a unique name of the listener;
1022 * return code is the size in bytes of the string
1023 * On error: return code is a negative errno value
1028 * buf: C string containing a transport
1029 * name and an unsigned integer value
1030 * representing the port to listen on,
1031 * separated by whitespace
1032 * size: non-zero length of C string in @buf
1034 * On success: returns zero; NFS service is started
1035 * On error: return code is a negative errno value
1040 * buf: C string containing a "-" followed
1041 * by a transport name and an unsigned
1042 * integer value representing the port
1043 * to listen on, separated by whitespace
1044 * size: non-zero length of C string in @buf
1046 * On success: returns zero; NFS service no longer listens
1048 * On error: return code is a negative errno value
1050 static ssize_t
write_ports(struct file
*file
, char *buf
, size_t size
)
1054 mutex_lock(&nfsd_mutex
);
1055 rv
= __write_ports(file
, buf
, size
);
1056 mutex_unlock(&nfsd_mutex
);
1061 int nfsd_max_blksize
;
1064 * write_maxblksize - Set or report the current NFS blksize
1073 * buf: C string containing an unsigned
1074 * integer value representing the new
1076 * size: non-zero length of C string in @buf
1078 * On success: passed-in buffer filled with '\n'-terminated C string
1079 * containing numeric value of the current NFS blksize
1081 * return code is the size in bytes of the string
1082 * On error: return code is zero or a negative errno value
1084 static ssize_t
write_maxblksize(struct file
*file
, char *buf
, size_t size
)
1089 int rv
= get_int(&mesg
, &bsize
);
1092 /* force bsize into allowed range and
1093 * required alignment.
1097 if (bsize
> NFSSVC_MAXBLKSIZE
)
1098 bsize
= NFSSVC_MAXBLKSIZE
;
1100 mutex_lock(&nfsd_mutex
);
1101 if (nfsd_serv
&& nfsd_serv
->sv_nrthreads
) {
1102 mutex_unlock(&nfsd_mutex
);
1105 nfsd_max_blksize
= bsize
;
1106 mutex_unlock(&nfsd_mutex
);
1108 return sprintf(buf
, "%d\n", nfsd_max_blksize
);
1111 #ifdef CONFIG_NFSD_V4
1112 extern time_t nfs4_leasetime(void);
1114 static ssize_t
__write_leasetime(struct file
*file
, char *buf
, size_t size
)
1116 /* if size > 10 seconds, call
1117 * nfs4_reset_lease() then write out the new lease (seconds) as reply
1125 rv
= get_int(&mesg
, &lease
);
1128 if (lease
< 10 || lease
> 3600)
1130 nfs4_reset_lease(lease
);
1132 sprintf(buf
, "%ld\n", nfs4_lease_time());
1137 * write_leasetime - Set or report the current NFSv4 lease time
1146 * buf: C string containing an unsigned
1147 * integer value representing the new
1148 * NFSv4 lease expiry time
1149 * size: non-zero length of C string in @buf
1151 * On success: passed-in buffer filled with '\n'-terminated C
1152 * string containing unsigned integer value of the
1153 * current lease expiry time;
1154 * return code is the size in bytes of the string
1155 * On error: return code is zero or a negative errno value
1157 static ssize_t
write_leasetime(struct file
*file
, char *buf
, size_t size
)
1161 mutex_lock(&nfsd_mutex
);
1162 rv
= __write_leasetime(file
, buf
, size
);
1163 mutex_unlock(&nfsd_mutex
);
1167 extern char *nfs4_recoverydir(void);
1169 static ssize_t
__write_recoverydir(struct file
*file
, char *buf
, size_t size
)
1178 if (size
> PATH_MAX
|| buf
[size
-1] != '\n')
1183 len
= qword_get(&mesg
, recdir
, size
);
1187 status
= nfs4_reset_recoverydir(recdir
);
1189 sprintf(buf
, "%s\n", nfs4_recoverydir());
1194 * write_recoverydir - Set or report the pathname of the recovery directory
1203 * buf: C string containing the pathname
1204 * of the directory on a local file
1205 * system containing permanent NFSv4
1207 * size: non-zero length of C string in @buf
1209 * On success: passed-in buffer filled with '\n'-terminated C string
1210 * containing the current recovery pathname setting;
1211 * return code is the size in bytes of the string
1212 * On error: return code is zero or a negative errno value
1214 static ssize_t
write_recoverydir(struct file
*file
, char *buf
, size_t size
)
1218 mutex_lock(&nfsd_mutex
);
1219 rv
= __write_recoverydir(file
, buf
, size
);
1220 mutex_unlock(&nfsd_mutex
);
1226 /*----------------------------------------------------------------------------*/
1228 * populating the filesystem.
1231 static int nfsd_fill_super(struct super_block
* sb
, void * data
, int silent
)
1233 static struct tree_descr nfsd_files
[] = {
1234 [NFSD_Svc
] = {".svc", &transaction_ops
, S_IWUSR
},
1235 [NFSD_Add
] = {".add", &transaction_ops
, S_IWUSR
},
1236 [NFSD_Del
] = {".del", &transaction_ops
, S_IWUSR
},
1237 [NFSD_Export
] = {".export", &transaction_ops
, S_IWUSR
},
1238 [NFSD_Unexport
] = {".unexport", &transaction_ops
, S_IWUSR
},
1239 [NFSD_Getfd
] = {".getfd", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1240 [NFSD_Getfs
] = {".getfs", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1241 [NFSD_List
] = {"exports", &exports_operations
, S_IRUGO
},
1242 [NFSD_FO_UnlockIP
] = {"unlock_ip",
1243 &transaction_ops
, S_IWUSR
|S_IRUSR
},
1244 [NFSD_FO_UnlockFS
] = {"unlock_filesystem",
1245 &transaction_ops
, S_IWUSR
|S_IRUSR
},
1246 [NFSD_Fh
] = {"filehandle", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1247 [NFSD_Threads
] = {"threads", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1248 [NFSD_Pool_Threads
] = {"pool_threads", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1249 [NFSD_Versions
] = {"versions", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1250 [NFSD_Ports
] = {"portlist", &transaction_ops
, S_IWUSR
|S_IRUGO
},
1251 [NFSD_MaxBlkSize
] = {"max_block_size", &transaction_ops
, S_IWUSR
|S_IRUGO
},
1252 #ifdef CONFIG_NFSD_V4
1253 [NFSD_Leasetime
] = {"nfsv4leasetime", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1254 [NFSD_RecoveryDir
] = {"nfsv4recoverydir", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1258 return simple_fill_super(sb
, 0x6e667364, nfsd_files
);
1261 static int nfsd_get_sb(struct file_system_type
*fs_type
,
1262 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
1264 return get_sb_single(fs_type
, flags
, data
, nfsd_fill_super
, mnt
);
1267 static struct file_system_type nfsd_fs_type
= {
1268 .owner
= THIS_MODULE
,
1270 .get_sb
= nfsd_get_sb
,
1271 .kill_sb
= kill_litter_super
,
1274 #ifdef CONFIG_PROC_FS
1275 static int create_proc_exports_entry(void)
1277 struct proc_dir_entry
*entry
;
1279 entry
= proc_mkdir("fs/nfs", NULL
);
1282 entry
= proc_create("exports", 0, entry
, &exports_operations
);
1287 #else /* CONFIG_PROC_FS */
1288 static int create_proc_exports_entry(void)
1294 static int __init
init_nfsd(void)
1297 printk(KERN_INFO
"Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1299 retval
= nfs4_state_init(); /* nfs4 locking state */
1302 nfsd_stat_init(); /* Statistics */
1303 retval
= nfsd_reply_cache_init();
1306 retval
= nfsd_export_init();
1308 goto out_free_cache
;
1309 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1310 retval
= nfsd_idmap_init();
1312 goto out_free_lockd
;
1313 retval
= create_proc_exports_entry();
1315 goto out_free_idmap
;
1316 retval
= register_filesystem(&nfsd_fs_type
);
1321 remove_proc_entry("fs/nfs/exports", NULL
);
1322 remove_proc_entry("fs/nfs", NULL
);
1324 nfsd_idmap_shutdown();
1326 nfsd_lockd_shutdown();
1327 nfsd_export_shutdown();
1329 nfsd_reply_cache_shutdown();
1331 nfsd_stat_shutdown();
1336 static void __exit
exit_nfsd(void)
1338 nfsd_export_shutdown();
1339 nfsd_reply_cache_shutdown();
1340 remove_proc_entry("fs/nfs/exports", NULL
);
1341 remove_proc_entry("fs/nfs", NULL
);
1342 nfsd_stat_shutdown();
1343 nfsd_lockd_shutdown();
1344 nfsd_idmap_shutdown();
1346 unregister_filesystem(&nfsd_fs_type
);
1349 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1350 MODULE_LICENSE("GPL");
1351 module_init(init_nfsd
)
1352 module_exit(exit_nfsd
)