2 * Syscall interface to knfsd.
4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
7 #include <linux/slab.h>
8 #include <linux/namei.h>
9 #include <linux/ctype.h>
11 #include <linux/sunrpc/svcsock.h>
12 #include <linux/lockd/lockd.h>
13 #include <linux/sunrpc/addr.h>
14 #include <linux/sunrpc/gss_api.h>
15 #include <linux/sunrpc/gss_krb5_enctypes.h>
16 #include <linux/sunrpc/rpc_pipe_fs.h>
17 #include <linux/module.h>
26 * We have a single directory with several nodes in it.
38 NFSD_Reply_Cache_Stats
,
43 NFSD_SupportedEnctypes
,
45 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
46 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
56 * write() for these nodes.
58 static ssize_t
write_filehandle(struct file
*file
, char *buf
, size_t size
);
59 static ssize_t
write_unlock_ip(struct file
*file
, char *buf
, size_t size
);
60 static ssize_t
write_unlock_fs(struct file
*file
, char *buf
, size_t size
);
61 static ssize_t
write_threads(struct file
*file
, char *buf
, size_t size
);
62 static ssize_t
write_pool_threads(struct file
*file
, char *buf
, size_t size
);
63 static ssize_t
write_versions(struct file
*file
, char *buf
, size_t size
);
64 static ssize_t
write_ports(struct file
*file
, char *buf
, size_t size
);
65 static ssize_t
write_maxblksize(struct file
*file
, char *buf
, size_t size
);
66 static ssize_t
write_maxconn(struct file
*file
, char *buf
, size_t size
);
68 static ssize_t
write_leasetime(struct file
*file
, char *buf
, size_t size
);
69 static ssize_t
write_gracetime(struct file
*file
, char *buf
, size_t size
);
70 static ssize_t
write_recoverydir(struct file
*file
, char *buf
, size_t size
);
73 static ssize_t (*write_op
[])(struct file
*, char *, size_t) = {
74 [NFSD_Fh
] = write_filehandle
,
75 [NFSD_FO_UnlockIP
] = write_unlock_ip
,
76 [NFSD_FO_UnlockFS
] = write_unlock_fs
,
77 [NFSD_Threads
] = write_threads
,
78 [NFSD_Pool_Threads
] = write_pool_threads
,
79 [NFSD_Versions
] = write_versions
,
80 [NFSD_Ports
] = write_ports
,
81 [NFSD_MaxBlkSize
] = write_maxblksize
,
82 [NFSD_MaxConnections
] = write_maxconn
,
84 [NFSD_Leasetime
] = write_leasetime
,
85 [NFSD_Gracetime
] = write_gracetime
,
86 [NFSD_RecoveryDir
] = write_recoverydir
,
90 static ssize_t
nfsctl_transaction_write(struct file
*file
, const char __user
*buf
, size_t size
, loff_t
*pos
)
92 ino_t ino
= file_inode(file
)->i_ino
;
96 if (ino
>= ARRAY_SIZE(write_op
) || !write_op
[ino
])
99 data
= simple_transaction_get(file
, buf
, size
);
101 return PTR_ERR(data
);
103 rv
= write_op
[ino
](file
, data
, size
);
105 simple_transaction_set(file
, rv
);
111 static ssize_t
nfsctl_transaction_read(struct file
*file
, char __user
*buf
, size_t size
, loff_t
*pos
)
113 if (! file
->private_data
) {
114 /* An attempt to read a transaction file without writing
115 * causes a 0-byte write so that the file can return
118 ssize_t rv
= nfsctl_transaction_write(file
, buf
, 0, pos
);
122 return simple_transaction_read(file
, buf
, size
, pos
);
125 static const struct file_operations transaction_ops
= {
126 .write
= nfsctl_transaction_write
,
127 .read
= nfsctl_transaction_read
,
128 .release
= simple_transaction_release
,
129 .llseek
= default_llseek
,
132 static int exports_net_open(struct net
*net
, struct file
*file
)
135 struct seq_file
*seq
;
136 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
138 err
= seq_open(file
, &nfs_exports_op
);
142 seq
= file
->private_data
;
143 seq
->private = nn
->svc_export_cache
;
147 static int exports_proc_open(struct inode
*inode
, struct file
*file
)
149 return exports_net_open(current
->nsproxy
->net_ns
, file
);
152 static const struct file_operations exports_proc_operations
= {
153 .open
= exports_proc_open
,
156 .release
= seq_release
,
157 .owner
= THIS_MODULE
,
160 static int exports_nfsd_open(struct inode
*inode
, struct file
*file
)
162 return exports_net_open(inode
->i_sb
->s_fs_info
, file
);
165 static const struct file_operations exports_nfsd_operations
= {
166 .open
= exports_nfsd_open
,
169 .release
= seq_release
,
170 .owner
= THIS_MODULE
,
173 static int export_features_show(struct seq_file
*m
, void *v
)
175 seq_printf(m
, "0x%x 0x%x\n", NFSEXP_ALLFLAGS
, NFSEXP_SECINFO_FLAGS
);
179 static int export_features_open(struct inode
*inode
, struct file
*file
)
181 return single_open(file
, export_features_show
, NULL
);
184 static const struct file_operations export_features_operations
= {
185 .open
= export_features_open
,
188 .release
= single_release
,
191 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
192 static int supported_enctypes_show(struct seq_file
*m
, void *v
)
194 seq_printf(m
, KRB5_SUPPORTED_ENCTYPES
);
198 static int supported_enctypes_open(struct inode
*inode
, struct file
*file
)
200 return single_open(file
, supported_enctypes_show
, NULL
);
203 static const struct file_operations supported_enctypes_ops
= {
204 .open
= supported_enctypes_open
,
207 .release
= single_release
,
209 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
211 static const struct file_operations pool_stats_operations
= {
212 .open
= nfsd_pool_stats_open
,
215 .release
= nfsd_pool_stats_release
,
216 .owner
= THIS_MODULE
,
219 static struct file_operations reply_cache_stats_operations
= {
220 .open
= nfsd_reply_cache_stats_open
,
223 .release
= single_release
,
226 /*----------------------------------------------------------------------------*/
228 * payload - write methods
233 * write_unlock_ip - Release all locks used by a client
238 * buf: '\n'-terminated C string containing a
239 * presentation format IP address
240 * size: length of C string in @buf
242 * On success: returns zero if all specified locks were released;
243 * returns one if one or more locks were not released
244 * On error: return code is negative errno value
246 static ssize_t
write_unlock_ip(struct file
*file
, char *buf
, size_t size
)
248 struct sockaddr_storage address
;
249 struct sockaddr
*sap
= (struct sockaddr
*)&address
;
250 size_t salen
= sizeof(address
);
252 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
258 if (buf
[size
-1] != '\n')
262 if (qword_get(&buf
, fo_path
, size
) < 0)
265 if (rpc_pton(net
, fo_path
, size
, sap
, salen
) == 0)
268 return nlmsvc_unlock_all_by_ip(sap
);
272 * write_unlock_fs - Release all locks on a local file system
277 * buf: '\n'-terminated C string containing the
278 * absolute pathname of a local file system
279 * size: length of C string in @buf
281 * On success: returns zero if all specified locks were released;
282 * returns one if one or more locks were not released
283 * On error: return code is negative errno value
285 static ssize_t
write_unlock_fs(struct file
*file
, char *buf
, size_t size
)
295 if (buf
[size
-1] != '\n')
299 if (qword_get(&buf
, fo_path
, size
) < 0)
302 error
= kern_path(fo_path
, 0, &path
);
307 * XXX: Needs better sanity checking. Otherwise we could end up
308 * releasing locks on the wrong file system.
311 * 1. Does the path refer to a directory?
312 * 2. Is that directory a mount point, or
313 * 3. Is that directory the root of an exported file system?
315 error
= nlmsvc_unlock_all_by_sb(path
.dentry
->d_sb
);
322 * write_filehandle - Get a variable-length NFS file handle by path
324 * On input, the buffer contains a '\n'-terminated C string comprised of
325 * three alphanumeric words separated by whitespace. The string may
326 * contain escape sequences.
330 * domain: client domain name
331 * path: export pathname
332 * maxsize: numeric maximum size of
334 * size: length of C string in @buf
336 * On success: passed-in buffer filled with '\n'-terminated C
337 * string containing a ASCII hex text version
338 * of the NFS file handle;
339 * return code is the size in bytes of the string
340 * On error: return code is negative errno value
342 static ssize_t
write_filehandle(struct file
*file
, char *buf
, size_t size
)
345 int uninitialized_var(maxsize
);
348 struct auth_domain
*dom
;
350 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
355 if (buf
[size
-1] != '\n')
360 len
= qword_get(&mesg
, dname
, size
);
365 len
= qword_get(&mesg
, path
, size
);
369 len
= get_int(&mesg
, &maxsize
);
373 if (maxsize
< NFS_FHSIZE
)
375 maxsize
= min(maxsize
, NFS3_FHSIZE
);
377 if (qword_get(&mesg
, mesg
, size
)>0)
380 /* we have all the words, they are in buf.. */
381 dom
= unix_domain_find(dname
);
385 len
= exp_rootfh(net
, dom
, path
, &fh
, maxsize
);
386 auth_domain_put(dom
);
391 len
= SIMPLE_TRANSACTION_LIMIT
;
392 qword_addhex(&mesg
, &len
, (char*)&fh
.fh_base
, fh
.fh_size
);
398 * write_threads - Start NFSD, or report the current number of running threads
404 * On success: passed-in buffer filled with '\n'-terminated C
405 * string numeric value representing the number of
406 * running NFSD threads;
407 * return code is the size in bytes of the string
408 * On error: return code is zero
413 * buf: C string containing an unsigned
414 * integer value representing the
415 * number of NFSD threads to start
416 * size: non-zero length of C string in @buf
418 * On success: NFS service is started;
419 * passed-in buffer filled with '\n'-terminated C
420 * string numeric value representing the number of
421 * running NFSD threads;
422 * return code is the size in bytes of the string
423 * On error: return code is zero or a negative errno value
425 static ssize_t
write_threads(struct file
*file
, char *buf
, size_t size
)
429 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
433 rv
= get_int(&mesg
, &newthreads
);
438 rv
= nfsd_svc(newthreads
, net
);
442 rv
= nfsd_nrthreads(net
);
444 return scnprintf(buf
, SIMPLE_TRANSACTION_LIMIT
, "%d\n", rv
);
448 * write_pool_threads - Set or report the current number of threads per pool
457 * buf: C string containing whitespace-
458 * separated unsigned integer values
459 * representing the number of NFSD
460 * threads to start in each pool
461 * size: non-zero length of C string in @buf
463 * On success: passed-in buffer filled with '\n'-terminated C
464 * string containing integer values representing the
465 * number of NFSD threads in each pool;
466 * return code is the size in bytes of the string
467 * On error: return code is zero or a negative errno value
469 static ssize_t
write_pool_threads(struct file
*file
, char *buf
, size_t size
)
471 /* if size > 0, look for an array of number of threads per node
472 * and apply them then write out number of threads per node as reply
480 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
482 mutex_lock(&nfsd_mutex
);
483 npools
= nfsd_nrpools(net
);
486 * NFS is shut down. The admin can start it by
487 * writing to the threads file but NOT the pool_threads
488 * file, sorry. Report zero threads.
490 mutex_unlock(&nfsd_mutex
);
495 nthreads
= kcalloc(npools
, sizeof(int), GFP_KERNEL
);
497 if (nthreads
== NULL
)
501 for (i
= 0; i
< npools
; i
++) {
502 rv
= get_int(&mesg
, &nthreads
[i
]);
504 break; /* fewer numbers than pools */
506 goto out_free
; /* syntax error */
511 rv
= nfsd_set_nrthreads(i
, nthreads
, net
);
516 rv
= nfsd_get_nrthreads(npools
, nthreads
, net
);
521 size
= SIMPLE_TRANSACTION_LIMIT
;
522 for (i
= 0; i
< npools
&& size
> 0; i
++) {
523 snprintf(mesg
, size
, "%d%c", nthreads
[i
], (i
== npools
-1 ? '\n' : ' '));
531 mutex_unlock(&nfsd_mutex
);
535 static ssize_t
__write_versions(struct file
*file
, char *buf
, size_t size
)
538 char *vers
, *minorp
, sign
;
539 int len
, num
, remaining
;
543 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
544 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
548 /* Cannot change versions without updating
549 * nn->nfsd_serv->sv_xdrsize, and reallocing
550 * rq_argp and rq_resp
553 if (buf
[size
-1] != '\n')
558 len
= qword_get(&mesg
, vers
, size
);
559 if (len
<= 0) return -EINVAL
;
562 if (sign
== '+' || sign
== '-')
563 num
= simple_strtol((vers
+1), &minorp
, 0);
565 num
= simple_strtol(vers
, &minorp
, 0);
566 if (*minorp
== '.') {
569 minor
= simple_strtoul(minorp
+1, NULL
, 0);
572 if (nfsd_minorversion(minor
, sign
== '-' ?
573 NFSD_CLEAR
: NFSD_SET
) < 0)
581 nfsd_vers(num
, sign
== '-' ? NFSD_CLEAR
: NFSD_SET
);
588 } while ((len
= qword_get(&mesg
, vers
, size
)) > 0);
589 /* If all get turned off, turn them back on, as
590 * having no versions is BAD
592 nfsd_reset_versions();
595 /* Now write current state into reply buffer */
598 remaining
= SIMPLE_TRANSACTION_LIMIT
;
599 for (num
=2 ; num
<= 4 ; num
++)
600 if (nfsd_vers(num
, NFSD_AVAIL
)) {
601 len
= snprintf(buf
, remaining
, "%s%c%d", sep
,
602 nfsd_vers(num
, NFSD_TEST
)?'+':'-',
612 if (nfsd_vers(4, NFSD_AVAIL
))
613 for (minor
= 1; minor
<= NFSD_SUPPORTED_MINOR_VERSION
;
615 len
= snprintf(buf
, remaining
, " %c4.%u",
616 (nfsd_vers(4, NFSD_TEST
) &&
617 nfsd_minorversion(minor
, NFSD_TEST
)) ?
628 len
= snprintf(buf
, remaining
, "\n");
635 * write_versions - Set or report the available NFS protocol versions
641 * On success: passed-in buffer filled with '\n'-terminated C
642 * string containing positive or negative integer
643 * values representing the current status of each
645 * return code is the size in bytes of the string
646 * On error: return code is zero or a negative errno value
651 * buf: C string containing whitespace-
652 * separated positive or negative
653 * integer values representing NFS
654 * protocol versions to enable ("+n")
656 * size: non-zero length of C string in @buf
658 * On success: status of zero or more protocol versions has
659 * been updated; passed-in buffer filled with
660 * '\n'-terminated C string containing positive
661 * or negative integer values representing the
662 * current status of each protocol version;
663 * return code is the size in bytes of the string
664 * On error: return code is zero or a negative errno value
666 static ssize_t
write_versions(struct file
*file
, char *buf
, size_t size
)
670 mutex_lock(&nfsd_mutex
);
671 rv
= __write_versions(file
, buf
, size
);
672 mutex_unlock(&nfsd_mutex
);
677 * Zero-length write. Return a list of NFSD's current listener
680 static ssize_t
__write_ports_names(char *buf
, struct net
*net
)
682 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
684 if (nn
->nfsd_serv
== NULL
)
686 return svc_xprt_names(nn
->nfsd_serv
, buf
, SIMPLE_TRANSACTION_LIMIT
);
690 * A single 'fd' number was written, in which case it must be for
691 * a socket of a supported family/protocol, and we use it as an
694 static ssize_t
__write_ports_addfd(char *buf
, struct net
*net
)
698 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
700 err
= get_int(&mesg
, &fd
);
701 if (err
!= 0 || fd
< 0)
704 if (svc_alien_sock(net
, fd
)) {
705 printk(KERN_ERR
"%s: socket net is different to NFSd's one\n", __func__
);
709 err
= nfsd_create_serv(net
);
713 err
= svc_addsock(nn
->nfsd_serv
, fd
, buf
, SIMPLE_TRANSACTION_LIMIT
);
719 /* Decrease the count, but don't shut down the service */
720 nn
->nfsd_serv
->sv_nrthreads
--;
725 * A transport listener is added by writing it's transport name and
728 static ssize_t
__write_ports_addxprt(char *buf
, struct net
*net
)
731 struct svc_xprt
*xprt
;
733 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
735 if (sscanf(buf
, "%15s %5u", transport
, &port
) != 2)
738 if (port
< 1 || port
> USHRT_MAX
)
741 err
= nfsd_create_serv(net
);
745 err
= svc_create_xprt(nn
->nfsd_serv
, transport
, net
,
746 PF_INET
, port
, SVC_SOCK_ANONYMOUS
);
750 err
= svc_create_xprt(nn
->nfsd_serv
, transport
, net
,
751 PF_INET6
, port
, SVC_SOCK_ANONYMOUS
);
752 if (err
< 0 && err
!= -EAFNOSUPPORT
)
755 /* Decrease the count, but don't shut down the service */
756 nn
->nfsd_serv
->sv_nrthreads
--;
759 xprt
= svc_find_xprt(nn
->nfsd_serv
, transport
, net
, PF_INET
, port
);
761 svc_close_xprt(xprt
);
769 static ssize_t
__write_ports(struct file
*file
, char *buf
, size_t size
,
773 return __write_ports_names(buf
, net
);
776 return __write_ports_addfd(buf
, net
);
779 return __write_ports_addxprt(buf
, net
);
785 * write_ports - Pass a socket file descriptor or transport name to listen on
791 * On success: passed-in buffer filled with a '\n'-terminated C
792 * string containing a whitespace-separated list of
793 * named NFSD listeners;
794 * return code is the size in bytes of the string
795 * On error: return code is zero or a negative errno value
800 * buf: C string containing an unsigned
801 * integer value representing a bound
802 * but unconnected socket that is to be
803 * used as an NFSD listener; listen(3)
804 * must be called for a SOCK_STREAM
805 * socket, otherwise it is ignored
806 * size: non-zero length of C string in @buf
808 * On success: NFS service is started;
809 * passed-in buffer filled with a '\n'-terminated C
810 * string containing a unique alphanumeric name of
812 * return code is the size in bytes of the string
813 * On error: return code is a negative errno value
818 * buf: C string containing a transport
819 * name and an unsigned integer value
820 * representing the port to listen on,
821 * separated by whitespace
822 * size: non-zero length of C string in @buf
824 * On success: returns zero; NFS service is started
825 * On error: return code is a negative errno value
827 static ssize_t
write_ports(struct file
*file
, char *buf
, size_t size
)
830 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
832 mutex_lock(&nfsd_mutex
);
833 rv
= __write_ports(file
, buf
, size
, net
);
834 mutex_unlock(&nfsd_mutex
);
839 int nfsd_max_blksize
;
842 * write_maxblksize - Set or report the current NFS blksize
851 * buf: C string containing an unsigned
852 * integer value representing the new
854 * size: non-zero length of C string in @buf
856 * On success: passed-in buffer filled with '\n'-terminated C string
857 * containing numeric value of the current NFS blksize
859 * return code is the size in bytes of the string
860 * On error: return code is zero or a negative errno value
862 static ssize_t
write_maxblksize(struct file
*file
, char *buf
, size_t size
)
865 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
866 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
870 int rv
= get_int(&mesg
, &bsize
);
873 /* force bsize into allowed range and
874 * required alignment.
876 bsize
= max_t(int, bsize
, 1024);
877 bsize
= min_t(int, bsize
, NFSSVC_MAXBLKSIZE
);
879 mutex_lock(&nfsd_mutex
);
881 mutex_unlock(&nfsd_mutex
);
884 nfsd_max_blksize
= bsize
;
885 mutex_unlock(&nfsd_mutex
);
888 return scnprintf(buf
, SIMPLE_TRANSACTION_LIMIT
, "%d\n",
893 * write_maxconn - Set or report the current max number of connections
901 * buf: C string containing an unsigned
902 * integer value representing the new
903 * number of max connections
904 * size: non-zero length of C string in @buf
906 * On success: passed-in buffer filled with '\n'-terminated C string
907 * containing numeric value of max_connections setting
908 * for this net namespace;
909 * return code is the size in bytes of the string
910 * On error: return code is zero or a negative errno value
912 static ssize_t
write_maxconn(struct file
*file
, char *buf
, size_t size
)
915 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
916 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
917 unsigned int maxconn
= nn
->max_connections
;
920 int rv
= get_uint(&mesg
, &maxconn
);
924 nn
->max_connections
= maxconn
;
927 return scnprintf(buf
, SIMPLE_TRANSACTION_LIMIT
, "%u\n", maxconn
);
930 #ifdef CONFIG_NFSD_V4
931 static ssize_t
__nfsd4_write_time(struct file
*file
, char *buf
, size_t size
,
932 time_t *time
, struct nfsd_net
*nn
)
940 rv
= get_int(&mesg
, &i
);
944 * Some sanity checking. We don't have a reason for
945 * these particular numbers, but problems with the
947 * - Too short: the briefest network outage may
948 * cause clients to lose all their locks. Also,
949 * the frequent polling may be wasteful.
950 * - Too long: do you really want reboot recovery
951 * to take more than an hour? Or to make other
952 * clients wait an hour before being able to
953 * revoke a dead client's locks?
955 if (i
< 10 || i
> 3600)
960 return scnprintf(buf
, SIMPLE_TRANSACTION_LIMIT
, "%ld\n", *time
);
963 static ssize_t
nfsd4_write_time(struct file
*file
, char *buf
, size_t size
,
964 time_t *time
, struct nfsd_net
*nn
)
968 mutex_lock(&nfsd_mutex
);
969 rv
= __nfsd4_write_time(file
, buf
, size
, time
, nn
);
970 mutex_unlock(&nfsd_mutex
);
975 * write_leasetime - Set or report the current NFSv4 lease time
984 * buf: C string containing an unsigned
985 * integer value representing the new
986 * NFSv4 lease expiry time
987 * size: non-zero length of C string in @buf
989 * On success: passed-in buffer filled with '\n'-terminated C
990 * string containing unsigned integer value of the
991 * current lease expiry time;
992 * return code is the size in bytes of the string
993 * On error: return code is zero or a negative errno value
995 static ssize_t
write_leasetime(struct file
*file
, char *buf
, size_t size
)
997 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
998 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
999 return nfsd4_write_time(file
, buf
, size
, &nn
->nfsd4_lease
, nn
);
1003 * write_gracetime - Set or report current NFSv4 grace period time
1005 * As above, but sets the time of the NFSv4 grace period.
1007 * Note this should never be set to less than the *previous*
1008 * lease-period time, but we don't try to enforce this. (In the common
1009 * case (a new boot), we don't know what the previous lease time was
1012 static ssize_t
write_gracetime(struct file
*file
, char *buf
, size_t size
)
1014 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
1015 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1016 return nfsd4_write_time(file
, buf
, size
, &nn
->nfsd4_grace
, nn
);
1019 static ssize_t
__write_recoverydir(struct file
*file
, char *buf
, size_t size
,
1020 struct nfsd_net
*nn
)
1029 if (size
> PATH_MAX
|| buf
[size
-1] != '\n')
1034 len
= qword_get(&mesg
, recdir
, size
);
1038 status
= nfs4_reset_recoverydir(recdir
);
1043 return scnprintf(buf
, SIMPLE_TRANSACTION_LIMIT
, "%s\n",
1044 nfs4_recoverydir());
1048 * write_recoverydir - Set or report the pathname of the recovery directory
1057 * buf: C string containing the pathname
1058 * of the directory on a local file
1059 * system containing permanent NFSv4
1061 * size: non-zero length of C string in @buf
1063 * On success: passed-in buffer filled with '\n'-terminated C string
1064 * containing the current recovery pathname setting;
1065 * return code is the size in bytes of the string
1066 * On error: return code is zero or a negative errno value
1068 static ssize_t
write_recoverydir(struct file
*file
, char *buf
, size_t size
)
1071 struct net
*net
= file
->f_dentry
->d_sb
->s_fs_info
;
1072 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1074 mutex_lock(&nfsd_mutex
);
1075 rv
= __write_recoverydir(file
, buf
, size
, nn
);
1076 mutex_unlock(&nfsd_mutex
);
1082 /*----------------------------------------------------------------------------*/
1084 * populating the filesystem.
1087 static int nfsd_fill_super(struct super_block
* sb
, void * data
, int silent
)
1089 static struct tree_descr nfsd_files
[] = {
1090 [NFSD_List
] = {"exports", &exports_nfsd_operations
, S_IRUGO
},
1091 [NFSD_Export_features
] = {"export_features",
1092 &export_features_operations
, S_IRUGO
},
1093 [NFSD_FO_UnlockIP
] = {"unlock_ip",
1094 &transaction_ops
, S_IWUSR
|S_IRUSR
},
1095 [NFSD_FO_UnlockFS
] = {"unlock_filesystem",
1096 &transaction_ops
, S_IWUSR
|S_IRUSR
},
1097 [NFSD_Fh
] = {"filehandle", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1098 [NFSD_Threads
] = {"threads", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1099 [NFSD_Pool_Threads
] = {"pool_threads", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1100 [NFSD_Pool_Stats
] = {"pool_stats", &pool_stats_operations
, S_IRUGO
},
1101 [NFSD_Reply_Cache_Stats
] = {"reply_cache_stats", &reply_cache_stats_operations
, S_IRUGO
},
1102 [NFSD_Versions
] = {"versions", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1103 [NFSD_Ports
] = {"portlist", &transaction_ops
, S_IWUSR
|S_IRUGO
},
1104 [NFSD_MaxBlkSize
] = {"max_block_size", &transaction_ops
, S_IWUSR
|S_IRUGO
},
1105 [NFSD_MaxConnections
] = {"max_connections", &transaction_ops
, S_IWUSR
|S_IRUGO
},
1106 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
1107 [NFSD_SupportedEnctypes
] = {"supported_krb5_enctypes", &supported_enctypes_ops
, S_IRUGO
},
1108 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
1109 #ifdef CONFIG_NFSD_V4
1110 [NFSD_Leasetime
] = {"nfsv4leasetime", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1111 [NFSD_Gracetime
] = {"nfsv4gracetime", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1112 [NFSD_RecoveryDir
] = {"nfsv4recoverydir", &transaction_ops
, S_IWUSR
|S_IRUSR
},
1116 struct net
*net
= data
;
1119 ret
= simple_fill_super(sb
, 0x6e667364, nfsd_files
);
1122 sb
->s_fs_info
= get_net(net
);
1126 static struct dentry
*nfsd_mount(struct file_system_type
*fs_type
,
1127 int flags
, const char *dev_name
, void *data
)
1129 return mount_ns(fs_type
, flags
, current
->nsproxy
->net_ns
, nfsd_fill_super
);
1132 static void nfsd_umount(struct super_block
*sb
)
1134 struct net
*net
= sb
->s_fs_info
;
1136 kill_litter_super(sb
);
1140 static struct file_system_type nfsd_fs_type
= {
1141 .owner
= THIS_MODULE
,
1143 .mount
= nfsd_mount
,
1144 .kill_sb
= nfsd_umount
,
1146 MODULE_ALIAS_FS("nfsd");
1148 #ifdef CONFIG_PROC_FS
1149 static int create_proc_exports_entry(void)
1151 struct proc_dir_entry
*entry
;
1153 entry
= proc_mkdir("fs/nfs", NULL
);
1156 entry
= proc_create("exports", 0, entry
,
1157 &exports_proc_operations
);
1159 remove_proc_entry("fs/nfs", NULL
);
1164 #else /* CONFIG_PROC_FS */
1165 static int create_proc_exports_entry(void)
1173 static __net_init
int nfsd_init_net(struct net
*net
)
1176 struct nfsd_net
*nn
= net_generic(net
, nfsd_net_id
);
1178 retval
= nfsd_export_init(net
);
1180 goto out_export_error
;
1181 retval
= nfsd_idmap_init(net
);
1183 goto out_idmap_error
;
1184 nn
->nfsd4_lease
= 90; /* default lease time */
1185 nn
->nfsd4_grace
= 90;
1189 nfsd_export_shutdown(net
);
1194 static __net_exit
void nfsd_exit_net(struct net
*net
)
1196 nfsd_idmap_shutdown(net
);
1197 nfsd_export_shutdown(net
);
1200 static struct pernet_operations nfsd_net_ops
= {
1201 .init
= nfsd_init_net
,
1202 .exit
= nfsd_exit_net
,
1204 .size
= sizeof(struct nfsd_net
),
1207 static int __init
init_nfsd(void)
1210 printk(KERN_INFO
"Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1212 retval
= register_cld_notifier();
1215 retval
= register_pernet_subsys(&nfsd_net_ops
);
1217 goto out_unregister_notifier
;
1218 retval
= nfsd4_init_slabs();
1220 goto out_unregister_pernet
;
1221 retval
= nfsd_fault_inject_init(); /* nfsd fault injection controls */
1223 goto out_free_slabs
;
1224 nfsd_stat_init(); /* Statistics */
1225 retval
= nfsd_reply_cache_init();
1228 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1229 retval
= create_proc_exports_entry();
1231 goto out_free_lockd
;
1232 retval
= register_filesystem(&nfsd_fs_type
);
1237 remove_proc_entry("fs/nfs/exports", NULL
);
1238 remove_proc_entry("fs/nfs", NULL
);
1240 nfsd_lockd_shutdown();
1241 nfsd_reply_cache_shutdown();
1243 nfsd_stat_shutdown();
1244 nfsd_fault_inject_cleanup();
1247 out_unregister_pernet
:
1248 unregister_pernet_subsys(&nfsd_net_ops
);
1249 out_unregister_notifier
:
1250 unregister_cld_notifier();
1254 static void __exit
exit_nfsd(void)
1256 nfsd_reply_cache_shutdown();
1257 remove_proc_entry("fs/nfs/exports", NULL
);
1258 remove_proc_entry("fs/nfs", NULL
);
1259 nfsd_stat_shutdown();
1260 nfsd_lockd_shutdown();
1262 nfsd_fault_inject_cleanup();
1263 unregister_filesystem(&nfsd_fs_type
);
1264 unregister_pernet_subsys(&nfsd_net_ops
);
1265 unregister_cld_notifier();
1268 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1269 MODULE_LICENSE("GPL");
1270 module_init(init_nfsd
)
1271 module_exit(exit_nfsd
)