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/namei.h>
10 #include <linux/ctype.h>
12 #include <linux/nfsd_idmap.h>
13 #include <linux/sunrpc/svcsock.h>
14 #include <linux/nfsd/nfsd.h>
15 #include <linux/nfsd/cache.h>
16 #include <linux/nfsd/syscall.h>
17 #include <linux/lockd/lockd.h>
18 #include <linux/sunrpc/clnt.h>
21 * We have a single directory with 9 nodes in it.
43 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
44 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
53 * write() for these nodes.
55 static ssize_t write_svc(struct file *file, char *buf, size_t size);
56 static ssize_t write_add(struct file *file, char *buf, size_t size);
57 static ssize_t write_del(struct file *file, char *buf, size_t size);
58 static ssize_t write_export(struct file *file, char *buf, size_t size);
59 static ssize_t write_unexport(struct file *file, char *buf, size_t size);
60 static ssize_t write_getfd(struct file *file, char *buf, size_t size);
61 static ssize_t write_getfs(struct file *file, char *buf, size_t size);
62 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
63 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
64 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
65 static ssize_t write_threads(struct file *file, char *buf, size_t size);
66 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
67 static ssize_t write_versions(struct file *file, char *buf, size_t size);
68 static ssize_t write_ports(struct file *file, char *buf, size_t size);
69 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
71 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
72 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
75 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
76 [NFSD_Svc] = write_svc,
77 [NFSD_Add] = write_add,
78 [NFSD_Del] = write_del,
79 [NFSD_Export] = write_export,
80 [NFSD_Unexport] = write_unexport,
81 [NFSD_Getfd] = write_getfd,
82 [NFSD_Getfs] = write_getfs,
83 [NFSD_Fh] = write_filehandle,
84 [NFSD_FO_UnlockIP] = write_unlock_ip,
85 [NFSD_FO_UnlockFS] = write_unlock_fs,
86 [NFSD_Threads] = write_threads,
87 [NFSD_Pool_Threads] = write_pool_threads,
88 [NFSD_Versions] = write_versions,
89 [NFSD_Ports] = write_ports,
90 [NFSD_MaxBlkSize] = write_maxblksize,
92 [NFSD_Leasetime] = write_leasetime,
93 [NFSD_RecoveryDir] = write_recoverydir,
97 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
99 ino_t ino = file->f_path.dentry->d_inode->i_ino;
103 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
106 data = simple_transaction_get(file, buf, size);
108 return PTR_ERR(data);
110 rv = write_op[ino](file, data, size);
112 simple_transaction_set(file, rv);
118 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
120 if (! file->private_data) {
121 /* An attempt to read a transaction file without writing
122 * causes a 0-byte write so that the file can return
125 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
129 return simple_transaction_read(file, buf, size, pos);
132 static const struct file_operations transaction_ops = {
133 .write = nfsctl_transaction_write,
134 .read = nfsctl_transaction_read,
135 .release = simple_transaction_release,
138 static int exports_open(struct inode *inode, struct file *file)
140 return seq_open(file, &nfs_exports_op);
143 static const struct file_operations exports_operations = {
144 .open = exports_open,
147 .release = seq_release,
148 .owner = THIS_MODULE,
151 extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
152 extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
154 static const struct file_operations pool_stats_operations = {
155 .open = nfsd_pool_stats_open,
158 .release = nfsd_pool_stats_release,
159 .owner = THIS_MODULE,
162 /*----------------------------------------------------------------------------*/
164 * payload - write methods
168 * write_svc - Start kernel's NFSD server
170 * Deprecated. /proc/fs/nfsd/threads is preferred.
171 * Function remains to support old versions of nfs-utils.
174 * buf: struct nfsctl_svc
175 * svc_port: port number of this
177 * svc_nthreads: number of threads to start
178 * size: size in bytes of passed in nfsctl_svc
180 * On success: returns zero
181 * On error: return code is negative errno value
183 static ssize_t write_svc(struct file *file, char *buf, size_t size)
185 struct nfsctl_svc *data;
187 if (size < sizeof(*data))
189 data = (struct nfsctl_svc*) buf;
190 err = nfsd_svc(data->svc_port, data->svc_nthreads);
197 * write_add - Add or modify client entry in auth unix cache
199 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
200 * Function remains to support old versions of nfs-utils.
203 * buf: struct nfsctl_client
204 * cl_ident: '\0'-terminated C string
205 * containing domain name
207 * cl_naddr: no. of items in cl_addrlist
208 * cl_addrlist: array of client addresses
209 * cl_fhkeytype: ignored
210 * cl_fhkeylen: ignored
212 * size: size in bytes of passed in nfsctl_client
214 * On success: returns zero
215 * On error: return code is negative errno value
217 * Note: Only AF_INET client addresses are passed in, since
218 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
220 static ssize_t write_add(struct file *file, char *buf, size_t size)
222 struct nfsctl_client *data;
223 if (size < sizeof(*data))
225 data = (struct nfsctl_client *)buf;
226 return exp_addclient(data);
230 * write_del - Remove client from auth unix cache
232 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
233 * Function remains to support old versions of nfs-utils.
236 * buf: struct nfsctl_client
237 * cl_ident: '\0'-terminated C string
238 * containing domain name
241 * cl_addrlist: ignored
242 * cl_fhkeytype: ignored
243 * cl_fhkeylen: ignored
245 * size: size in bytes of passed in nfsctl_client
247 * On success: returns zero
248 * On error: return code is negative errno value
250 * Note: Only AF_INET client addresses are passed in, since
251 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
253 static ssize_t write_del(struct file *file, char *buf, size_t size)
255 struct nfsctl_client *data;
256 if (size < sizeof(*data))
258 data = (struct nfsctl_client *)buf;
259 return exp_delclient(data);
263 * write_export - Export part or all of a local file system
265 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
266 * Function remains to support old versions of nfs-utils.
269 * buf: struct nfsctl_export
270 * ex_client: '\0'-terminated C string
271 * containing domain name
272 * of client allowed to access
274 * ex_path: '\0'-terminated C string
275 * containing pathname of
276 * directory in local file system
277 * ex_dev: fsid to use for this export
279 * ex_flags: export flags for this export
280 * ex_anon_uid: UID to use for anonymous
282 * ex_anon_gid: GID to use for anonymous
284 * size: size in bytes of passed in nfsctl_export
286 * On success: returns zero
287 * On error: return code is negative errno value
289 static ssize_t write_export(struct file *file, char *buf, size_t size)
291 struct nfsctl_export *data;
292 if (size < sizeof(*data))
294 data = (struct nfsctl_export*)buf;
295 return exp_export(data);
299 * write_unexport - Unexport a previously exported file system
301 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
302 * Function remains to support old versions of nfs-utils.
305 * buf: struct nfsctl_export
306 * ex_client: '\0'-terminated C string
307 * containing domain name
308 * of client no longer allowed
309 * to access this export
310 * ex_path: '\0'-terminated C string
311 * containing pathname of
312 * directory in local file system
316 * ex_anon_uid: ignored
317 * ex_anon_gid: ignored
318 * size: size in bytes of passed in nfsctl_export
320 * On success: returns zero
321 * On error: return code is negative errno value
323 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
325 struct nfsctl_export *data;
327 if (size < sizeof(*data))
329 data = (struct nfsctl_export*)buf;
330 return exp_unexport(data);
334 * write_getfs - Get a variable-length NFS file handle by path
336 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
337 * Function remains to support old versions of nfs-utils.
340 * buf: struct nfsctl_fsparm
341 * gd_addr: socket address of client
342 * gd_path: '\0'-terminated C string
343 * containing pathname of
344 * directory in local file system
345 * gd_maxlen: maximum size of returned file
347 * size: size in bytes of passed in nfsctl_fsparm
349 * On success: passed-in buffer filled with a knfsd_fh structure
350 * (a variable-length raw NFS file handle);
351 * return code is the size in bytes of the file handle
352 * On error: return code is negative errno value
354 * Note: Only AF_INET client addresses are passed in, since gd_addr
355 * is the same size as a struct sockaddr_in.
357 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
359 struct nfsctl_fsparm *data;
360 struct sockaddr_in *sin;
361 struct auth_domain *clp;
363 struct knfsd_fh *res;
366 if (size < sizeof(*data))
368 data = (struct nfsctl_fsparm*)buf;
369 err = -EPROTONOSUPPORT;
370 if (data->gd_addr.sa_family != AF_INET)
372 sin = (struct sockaddr_in *)&data->gd_addr;
373 if (data->gd_maxlen > NFS3_FHSIZE)
374 data->gd_maxlen = NFS3_FHSIZE;
376 res = (struct knfsd_fh*)buf;
380 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
382 clp = auth_unix_lookup(&in6);
386 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
387 auth_domain_put(clp);
391 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
397 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
399 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
400 * Function remains to support old versions of nfs-utils.
403 * buf: struct nfsctl_fdparm
404 * gd_addr: socket address of client
405 * gd_path: '\0'-terminated C string
406 * containing pathname of
407 * directory in local file system
408 * gd_version: fdparm structure version
409 * size: size in bytes of passed in nfsctl_fdparm
411 * On success: passed-in buffer filled with nfsctl_res
412 * (a fixed-length raw NFS file handle);
413 * return code is the size in bytes of the file handle
414 * On error: return code is negative errno value
416 * Note: Only AF_INET client addresses are passed in, since gd_addr
417 * is the same size as a struct sockaddr_in.
419 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
421 struct nfsctl_fdparm *data;
422 struct sockaddr_in *sin;
423 struct auth_domain *clp;
429 if (size < sizeof(*data))
431 data = (struct nfsctl_fdparm*)buf;
432 err = -EPROTONOSUPPORT;
433 if (data->gd_addr.sa_family != AF_INET)
436 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
440 sin = (struct sockaddr_in *)&data->gd_addr;
443 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
445 clp = auth_unix_lookup(&in6);
449 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
450 auth_domain_put(clp);
455 memset(res,0, NFS_FHSIZE);
456 memcpy(res, &fh.fh_base, fh.fh_size);
464 * write_unlock_ip - Release all locks used by a client
469 * buf: '\n'-terminated C string containing a
470 * presentation format IP address
471 * size: length of C string in @buf
473 * On success: returns zero if all specified locks were released;
474 * returns one if one or more locks were not released
475 * On error: return code is negative errno value
477 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
479 struct sockaddr_storage address;
480 struct sockaddr *sap = (struct sockaddr *)&address;
481 size_t salen = sizeof(address);
488 if (buf[size-1] != '\n')
492 if (qword_get(&buf, fo_path, size) < 0)
495 if (rpc_pton(fo_path, size, sap, salen) == 0)
498 return nlmsvc_unlock_all_by_ip(sap);
502 * write_unlock_fs - Release all locks on a local file system
507 * buf: '\n'-terminated C string containing the
508 * absolute pathname of a local file system
509 * size: length of C string in @buf
511 * On success: returns zero if all specified locks were released;
512 * returns one if one or more locks were not released
513 * On error: return code is negative errno value
515 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
525 if (buf[size-1] != '\n')
529 if (qword_get(&buf, fo_path, size) < 0)
532 error = kern_path(fo_path, 0, &path);
537 * XXX: Needs better sanity checking. Otherwise we could end up
538 * releasing locks on the wrong file system.
541 * 1. Does the path refer to a directory?
542 * 2. Is that directory a mount point, or
543 * 3. Is that directory the root of an exported file system?
545 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
552 * write_filehandle - Get a variable-length NFS file handle by path
554 * On input, the buffer contains a '\n'-terminated C string comprised of
555 * three alphanumeric words separated by whitespace. The string may
556 * contain escape sequences.
560 * domain: client domain name
561 * path: export pathname
562 * maxsize: numeric maximum size of
564 * size: length of C string in @buf
566 * On success: passed-in buffer filled with '\n'-terminated C
567 * string containing a ASCII hex text version
568 * of the NFS file handle;
569 * return code is the size in bytes of the string
570 * On error: return code is negative errno value
572 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
575 int uninitialized_var(maxsize);
578 struct auth_domain *dom;
584 if (buf[size-1] != '\n')
589 len = qword_get(&mesg, dname, size);
594 len = qword_get(&mesg, path, size);
598 len = get_int(&mesg, &maxsize);
602 if (maxsize < NFS_FHSIZE)
604 if (maxsize > NFS3_FHSIZE)
605 maxsize = NFS3_FHSIZE;
607 if (qword_get(&mesg, mesg, size)>0)
610 /* we have all the words, they are in buf.. */
611 dom = unix_domain_find(dname);
615 len = exp_rootfh(dom, path, &fh, maxsize);
616 auth_domain_put(dom);
621 len = SIMPLE_TRANSACTION_LIMIT;
622 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
628 * write_threads - Start NFSD, or report the current number of running threads
634 * On success: passed-in buffer filled with '\n'-terminated C
635 * string numeric value representing the number of
636 * running NFSD threads;
637 * return code is the size in bytes of the string
638 * On error: return code is zero
643 * buf: C string containing an unsigned
644 * integer value representing the
645 * number of NFSD threads to start
646 * size: non-zero length of C string in @buf
648 * On success: NFS service is started;
649 * passed-in buffer filled with '\n'-terminated C
650 * string numeric value representing the number of
651 * running NFSD threads;
652 * return code is the size in bytes of the string
653 * On error: return code is zero or a negative errno value
655 static ssize_t write_threads(struct file *file, char *buf, size_t size)
661 rv = get_int(&mesg, &newthreads);
666 rv = nfsd_svc(NFS_PORT, newthreads);
670 rv = nfsd_nrthreads();
672 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
676 * write_pool_threads - Set or report the current number of threads per pool
685 * buf: C string containing whitespace-
686 * separated unsigned integer values
687 * representing the number of NFSD
688 * threads to start in each pool
689 * size: non-zero length of C string in @buf
691 * On success: passed-in buffer filled with '\n'-terminated C
692 * string containing integer values representing the
693 * number of NFSD threads in each pool;
694 * return code is the size in bytes of the string
695 * On error: return code is zero or a negative errno value
697 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
699 /* if size > 0, look for an array of number of threads per node
700 * and apply them then write out number of threads per node as reply
709 mutex_lock(&nfsd_mutex);
710 npools = nfsd_nrpools();
713 * NFS is shut down. The admin can start it by
714 * writing to the threads file but NOT the pool_threads
715 * file, sorry. Report zero threads.
717 mutex_unlock(&nfsd_mutex);
722 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
724 if (nthreads == NULL)
728 for (i = 0; i < npools; i++) {
729 rv = get_int(&mesg, &nthreads[i]);
731 break; /* fewer numbers than pools */
733 goto out_free; /* syntax error */
738 rv = nfsd_set_nrthreads(i, nthreads);
743 rv = nfsd_get_nrthreads(npools, nthreads);
748 size = SIMPLE_TRANSACTION_LIMIT;
749 for (i = 0; i < npools && size > 0; i++) {
750 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
758 mutex_unlock(&nfsd_mutex);
762 static ssize_t __write_versions(struct file *file, char *buf, size_t size)
765 char *vers, *minorp, sign;
766 int len, num, remaining;
773 /* Cannot change versions without updating
774 * nfsd_serv->sv_xdrsize, and reallocing
775 * rq_argp and rq_resp
778 if (buf[size-1] != '\n')
783 len = qword_get(&mesg, vers, size);
784 if (len <= 0) return -EINVAL;
787 if (sign == '+' || sign == '-')
788 num = simple_strtol((vers+1), &minorp, 0);
790 num = simple_strtol(vers, &minorp, 0);
791 if (*minorp == '.') {
794 minor = simple_strtoul(minorp+1, NULL, 0);
797 if (nfsd_minorversion(minor, sign == '-' ?
798 NFSD_CLEAR : NFSD_SET) < 0)
806 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
813 } while ((len = qword_get(&mesg, vers, size)) > 0);
814 /* If all get turned off, turn them back on, as
815 * having no versions is BAD
817 nfsd_reset_versions();
820 /* Now write current state into reply buffer */
823 remaining = SIMPLE_TRANSACTION_LIMIT;
824 for (num=2 ; num <= 4 ; num++)
825 if (nfsd_vers(num, NFSD_AVAIL)) {
826 len = snprintf(buf, remaining, "%s%c%d", sep,
827 nfsd_vers(num, NFSD_TEST)?'+':'-',
837 if (nfsd_vers(4, NFSD_AVAIL))
838 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
840 len = snprintf(buf, remaining, " %c4.%u",
841 (nfsd_vers(4, NFSD_TEST) &&
842 nfsd_minorversion(minor, NFSD_TEST)) ?
853 len = snprintf(buf, remaining, "\n");
860 * write_versions - Set or report the available NFS protocol versions
866 * On success: passed-in buffer filled with '\n'-terminated C
867 * string containing positive or negative integer
868 * values representing the current status of each
870 * return code is the size in bytes of the string
871 * On error: return code is zero or a negative errno value
876 * buf: C string containing whitespace-
877 * separated positive or negative
878 * integer values representing NFS
879 * protocol versions to enable ("+n")
881 * size: non-zero length of C string in @buf
883 * On success: status of zero or more protocol versions has
884 * been updated; passed-in buffer filled with
885 * '\n'-terminated C string containing positive
886 * or negative integer values representing the
887 * current status of each protocol version;
888 * return code is the size in bytes of the string
889 * On error: return code is zero or a negative errno value
891 static ssize_t write_versions(struct file *file, char *buf, size_t size)
895 mutex_lock(&nfsd_mutex);
896 rv = __write_versions(file, buf, size);
897 mutex_unlock(&nfsd_mutex);
902 * Zero-length write. Return a list of NFSD's current listener
905 static ssize_t __write_ports_names(char *buf)
907 if (nfsd_serv == NULL)
909 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
913 * A single 'fd' number was written, in which case it must be for
914 * a socket of a supported family/protocol, and we use it as an
917 static ssize_t __write_ports_addfd(char *buf)
922 err = get_int(&mesg, &fd);
923 if (err != 0 || fd < 0)
926 err = nfsd_create_serv();
934 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
939 /* Decrease the count, but don't shut down the service */
940 nfsd_serv->sv_nrthreads--;
945 * A '-' followed by the 'name' of a socket means we close the socket.
947 static ssize_t __write_ports_delfd(char *buf)
952 toclose = kstrdup(buf + 1, GFP_KERNEL);
956 if (nfsd_serv != NULL)
957 len = svc_sock_names(nfsd_serv, buf,
958 SIMPLE_TRANSACTION_LIMIT, toclose);
967 * A transport listener is added by writing it's transport name and
970 static ssize_t __write_ports_addxprt(char *buf)
975 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
978 if (port < 1 || port > USHORT_MAX)
981 err = nfsd_create_serv();
985 err = svc_create_xprt(nfsd_serv, transport,
986 PF_INET, port, SVC_SOCK_ANONYMOUS);
988 /* Give a reasonable perror msg for bad transport string */
990 err = -EPROTONOSUPPORT;
997 * A transport listener is removed by writing a "-", it's transport
998 * name, and it's port number.
1000 static ssize_t __write_ports_delxprt(char *buf)
1002 struct svc_xprt *xprt;
1006 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
1009 if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL)
1012 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
1016 svc_close_xprt(xprt);
1021 static ssize_t __write_ports(struct file *file, char *buf, size_t size)
1024 return __write_ports_names(buf);
1026 if (isdigit(buf[0]))
1027 return __write_ports_addfd(buf);
1029 if (buf[0] == '-' && isdigit(buf[1]))
1030 return __write_ports_delfd(buf);
1032 if (isalpha(buf[0]))
1033 return __write_ports_addxprt(buf);
1035 if (buf[0] == '-' && isalpha(buf[1]))
1036 return __write_ports_delxprt(buf);
1042 * write_ports - Pass a socket file descriptor or transport name to listen on
1048 * On success: passed-in buffer filled with a '\n'-terminated C
1049 * string containing a whitespace-separated list of
1050 * named NFSD listeners;
1051 * return code is the size in bytes of the string
1052 * On error: return code is zero or a negative errno value
1057 * buf: C string containing an unsigned
1058 * integer value representing a bound
1059 * but unconnected socket that is to be
1060 * used as an NFSD listener; listen(3)
1061 * must be called for a SOCK_STREAM
1062 * socket, otherwise it is ignored
1063 * size: non-zero length of C string in @buf
1065 * On success: NFS service is started;
1066 * passed-in buffer filled with a '\n'-terminated C
1067 * string containing a unique alphanumeric name of
1069 * return code is the size in bytes of the string
1070 * On error: return code is a negative errno value
1075 * buf: C string containing a "-" followed
1076 * by an integer value representing a
1077 * previously passed in socket file
1079 * size: non-zero length of C string in @buf
1081 * On success: NFS service no longer listens on that socket;
1082 * passed-in buffer filled with a '\n'-terminated C
1083 * string containing a unique name of the listener;
1084 * return code is the size in bytes of the string
1085 * On error: return code is a negative errno value
1090 * buf: C string containing a transport
1091 * name and an unsigned integer value
1092 * representing the port to listen on,
1093 * separated by whitespace
1094 * size: non-zero length of C string in @buf
1096 * On success: returns zero; NFS service is started
1097 * On error: return code is a negative errno value
1102 * buf: C string containing a "-" followed
1103 * by a transport name and an unsigned
1104 * integer value representing the port
1105 * to listen on, separated by whitespace
1106 * size: non-zero length of C string in @buf
1108 * On success: returns zero; NFS service no longer listens
1110 * On error: return code is a negative errno value
1112 static ssize_t write_ports(struct file *file, char *buf, size_t size)
1116 mutex_lock(&nfsd_mutex);
1117 rv = __write_ports(file, buf, size);
1118 mutex_unlock(&nfsd_mutex);
1123 int nfsd_max_blksize;
1126 * write_maxblksize - Set or report the current NFS blksize
1135 * buf: C string containing an unsigned
1136 * integer value representing the new
1138 * size: non-zero length of C string in @buf
1140 * On success: passed-in buffer filled with '\n'-terminated C string
1141 * containing numeric value of the current NFS blksize
1143 * return code is the size in bytes of the string
1144 * On error: return code is zero or a negative errno value
1146 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
1151 int rv = get_int(&mesg, &bsize);
1154 /* force bsize into allowed range and
1155 * required alignment.
1159 if (bsize > NFSSVC_MAXBLKSIZE)
1160 bsize = NFSSVC_MAXBLKSIZE;
1162 mutex_lock(&nfsd_mutex);
1163 if (nfsd_serv && nfsd_serv->sv_nrthreads) {
1164 mutex_unlock(&nfsd_mutex);
1167 nfsd_max_blksize = bsize;
1168 mutex_unlock(&nfsd_mutex);
1171 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
1175 #ifdef CONFIG_NFSD_V4
1176 extern time_t nfs4_leasetime(void);
1178 static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
1180 /* if size > 10 seconds, call
1181 * nfs4_reset_lease() then write out the new lease (seconds) as reply
1189 rv = get_int(&mesg, &lease);
1192 if (lease < 10 || lease > 3600)
1194 nfs4_reset_lease(lease);
1197 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n",
1202 * write_leasetime - Set or report the current NFSv4 lease time
1211 * buf: C string containing an unsigned
1212 * integer value representing the new
1213 * NFSv4 lease expiry time
1214 * size: non-zero length of C string in @buf
1216 * On success: passed-in buffer filled with '\n'-terminated C
1217 * string containing unsigned integer value of the
1218 * current lease expiry time;
1219 * return code is the size in bytes of the string
1220 * On error: return code is zero or a negative errno value
1222 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
1226 mutex_lock(&nfsd_mutex);
1227 rv = __write_leasetime(file, buf, size);
1228 mutex_unlock(&nfsd_mutex);
1232 extern char *nfs4_recoverydir(void);
1234 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
1243 if (size > PATH_MAX || buf[size-1] != '\n')
1248 len = qword_get(&mesg, recdir, size);
1252 status = nfs4_reset_recoverydir(recdir);
1255 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1256 nfs4_recoverydir());
1260 * write_recoverydir - Set or report the pathname of the recovery directory
1269 * buf: C string containing the pathname
1270 * of the directory on a local file
1271 * system containing permanent NFSv4
1273 * size: non-zero length of C string in @buf
1275 * On success: passed-in buffer filled with '\n'-terminated C string
1276 * containing the current recovery pathname setting;
1277 * return code is the size in bytes of the string
1278 * On error: return code is zero or a negative errno value
1280 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1284 mutex_lock(&nfsd_mutex);
1285 rv = __write_recoverydir(file, buf, size);
1286 mutex_unlock(&nfsd_mutex);
1292 /*----------------------------------------------------------------------------*/
1294 * populating the filesystem.
1297 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1299 static struct tree_descr nfsd_files[] = {
1300 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
1301 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
1302 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
1303 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
1304 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
1305 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
1306 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
1307 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
1308 [NFSD_FO_UnlockIP] = {"unlock_ip",
1309 &transaction_ops, S_IWUSR|S_IRUSR},
1310 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1311 &transaction_ops, S_IWUSR|S_IRUSR},
1312 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1313 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
1314 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
1315 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
1316 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
1317 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
1318 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
1319 #ifdef CONFIG_NFSD_V4
1320 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
1321 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
1325 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1328 static int nfsd_get_sb(struct file_system_type *fs_type,
1329 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1331 return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
1334 static struct file_system_type nfsd_fs_type = {
1335 .owner = THIS_MODULE,
1337 .get_sb = nfsd_get_sb,
1338 .kill_sb = kill_litter_super,
1341 #ifdef CONFIG_PROC_FS
1342 static int create_proc_exports_entry(void)
1344 struct proc_dir_entry *entry;
1346 entry = proc_mkdir("fs/nfs", NULL);
1349 entry = proc_create("exports", 0, entry, &exports_operations);
1354 #else /* CONFIG_PROC_FS */
1355 static int create_proc_exports_entry(void)
1361 static int __init init_nfsd(void)
1364 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1366 retval = nfs4_state_init(); /* nfs4 locking state */
1369 nfsd_stat_init(); /* Statistics */
1370 retval = nfsd_reply_cache_init();
1373 retval = nfsd_export_init();
1375 goto out_free_cache;
1376 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1377 retval = nfsd_idmap_init();
1379 goto out_free_lockd;
1380 retval = create_proc_exports_entry();
1382 goto out_free_idmap;
1383 retval = register_filesystem(&nfsd_fs_type);
1388 remove_proc_entry("fs/nfs/exports", NULL);
1389 remove_proc_entry("fs/nfs", NULL);
1391 nfsd_idmap_shutdown();
1393 nfsd_lockd_shutdown();
1394 nfsd_export_shutdown();
1396 nfsd_reply_cache_shutdown();
1398 nfsd_stat_shutdown();
1403 static void __exit exit_nfsd(void)
1405 nfsd_export_shutdown();
1406 nfsd_reply_cache_shutdown();
1407 remove_proc_entry("fs/nfs/exports", NULL);
1408 remove_proc_entry("fs/nfs", NULL);
1409 nfsd_stat_shutdown();
1410 nfsd_lockd_shutdown();
1411 nfsd_idmap_shutdown();
1413 unregister_filesystem(&nfsd_fs_type);
1416 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1417 MODULE_LICENSE("GPL");
1418 module_init(init_nfsd)
1419 module_exit(exit_nfsd)