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/ctype.h>
30 #include <linux/nfs.h>
31 #include <linux/nfsd_idmap.h>
32 #include <linux/lockd/bind.h>
33 #include <linux/sunrpc/svc.h>
34 #include <linux/sunrpc/svcsock.h>
35 #include <linux/nfsd/nfsd.h>
36 #include <linux/nfsd/cache.h>
37 #include <linux/nfsd/xdr.h>
38 #include <linux/nfsd/syscall.h>
39 #include <linux/lockd/lockd.h>
40 #include <linux/sunrpc/clnt.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);
177 extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
179 static struct file_operations pool_stats_operations = {
180 .open = nfsd_pool_stats_open,
183 .release = nfsd_pool_stats_release,
184 .owner = THIS_MODULE,
187 /*----------------------------------------------------------------------------*/
189 * payload - write methods
193 * write_svc - Start kernel's NFSD server
195 * Deprecated. /proc/fs/nfsd/threads is preferred.
196 * Function remains to support old versions of nfs-utils.
199 * buf: struct nfsctl_svc
200 * svc_port: port number of this
202 * svc_nthreads: number of threads to start
203 * size: size in bytes of passed in nfsctl_svc
205 * On success: returns zero
206 * On error: return code is negative errno value
208 static ssize_t write_svc(struct file *file, char *buf, size_t size)
210 struct nfsctl_svc *data;
212 if (size < sizeof(*data))
214 data = (struct nfsctl_svc*) buf;
215 err = nfsd_svc(data->svc_port, data->svc_nthreads);
222 * write_add - Add or modify client entry in auth unix cache
224 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
225 * Function remains to support old versions of nfs-utils.
228 * buf: struct nfsctl_client
229 * cl_ident: '\0'-terminated C string
230 * containing domain name
232 * cl_naddr: no. of items in cl_addrlist
233 * cl_addrlist: array of client addresses
234 * cl_fhkeytype: ignored
235 * cl_fhkeylen: ignored
237 * size: size in bytes of passed in nfsctl_client
239 * On success: returns zero
240 * On error: return code is negative errno value
242 * Note: Only AF_INET client addresses are passed in, since
243 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
245 static ssize_t write_add(struct file *file, char *buf, size_t size)
247 struct nfsctl_client *data;
248 if (size < sizeof(*data))
250 data = (struct nfsctl_client *)buf;
251 return exp_addclient(data);
255 * write_del - Remove client from auth unix cache
257 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
258 * Function remains to support old versions of nfs-utils.
261 * buf: struct nfsctl_client
262 * cl_ident: '\0'-terminated C string
263 * containing domain name
266 * cl_addrlist: ignored
267 * cl_fhkeytype: ignored
268 * cl_fhkeylen: ignored
270 * size: size in bytes of passed in nfsctl_client
272 * On success: returns zero
273 * On error: return code is negative errno value
275 * Note: Only AF_INET client addresses are passed in, since
276 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
278 static ssize_t write_del(struct file *file, char *buf, size_t size)
280 struct nfsctl_client *data;
281 if (size < sizeof(*data))
283 data = (struct nfsctl_client *)buf;
284 return exp_delclient(data);
288 * write_export - Export part or all of a local file system
290 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
291 * Function remains to support old versions of nfs-utils.
294 * buf: struct nfsctl_export
295 * ex_client: '\0'-terminated C string
296 * containing domain name
297 * of client allowed to access
299 * ex_path: '\0'-terminated C string
300 * containing pathname of
301 * directory in local file system
302 * ex_dev: fsid to use for this export
304 * ex_flags: export flags for this export
305 * ex_anon_uid: UID to use for anonymous
307 * ex_anon_gid: GID to use for anonymous
309 * size: size in bytes of passed in nfsctl_export
311 * On success: returns zero
312 * On error: return code is negative errno value
314 static ssize_t write_export(struct file *file, char *buf, size_t size)
316 struct nfsctl_export *data;
317 if (size < sizeof(*data))
319 data = (struct nfsctl_export*)buf;
320 return exp_export(data);
324 * write_unexport - Unexport a previously exported file system
326 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
327 * Function remains to support old versions of nfs-utils.
330 * buf: struct nfsctl_export
331 * ex_client: '\0'-terminated C string
332 * containing domain name
333 * of client no longer allowed
334 * to access this export
335 * ex_path: '\0'-terminated C string
336 * containing pathname of
337 * directory in local file system
341 * ex_anon_uid: ignored
342 * ex_anon_gid: ignored
343 * size: size in bytes of passed in nfsctl_export
345 * On success: returns zero
346 * On error: return code is negative errno value
348 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
350 struct nfsctl_export *data;
352 if (size < sizeof(*data))
354 data = (struct nfsctl_export*)buf;
355 return exp_unexport(data);
359 * write_getfs - Get a variable-length NFS file handle by path
361 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
362 * Function remains to support old versions of nfs-utils.
365 * buf: struct nfsctl_fsparm
366 * gd_addr: socket address of client
367 * gd_path: '\0'-terminated C string
368 * containing pathname of
369 * directory in local file system
370 * gd_maxlen: maximum size of returned file
372 * size: size in bytes of passed in nfsctl_fsparm
374 * On success: passed-in buffer filled with a knfsd_fh structure
375 * (a variable-length raw NFS file handle);
376 * return code is the size in bytes of the file handle
377 * On error: return code is negative errno value
379 * Note: Only AF_INET client addresses are passed in, since gd_addr
380 * is the same size as a struct sockaddr_in.
382 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
384 struct nfsctl_fsparm *data;
385 struct sockaddr_in *sin;
386 struct auth_domain *clp;
388 struct knfsd_fh *res;
391 if (size < sizeof(*data))
393 data = (struct nfsctl_fsparm*)buf;
394 err = -EPROTONOSUPPORT;
395 if (data->gd_addr.sa_family != AF_INET)
397 sin = (struct sockaddr_in *)&data->gd_addr;
398 if (data->gd_maxlen > NFS3_FHSIZE)
399 data->gd_maxlen = NFS3_FHSIZE;
401 res = (struct knfsd_fh*)buf;
405 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
407 clp = auth_unix_lookup(&in6);
411 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
412 auth_domain_put(clp);
416 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
422 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
424 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
425 * Function remains to support old versions of nfs-utils.
428 * buf: struct nfsctl_fdparm
429 * gd_addr: socket address of client
430 * gd_path: '\0'-terminated C string
431 * containing pathname of
432 * directory in local file system
433 * gd_version: fdparm structure version
434 * size: size in bytes of passed in nfsctl_fdparm
436 * On success: passed-in buffer filled with nfsctl_res
437 * (a fixed-length raw NFS file handle);
438 * return code is the size in bytes of the file handle
439 * On error: return code is negative errno value
441 * Note: Only AF_INET client addresses are passed in, since gd_addr
442 * is the same size as a struct sockaddr_in.
444 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
446 struct nfsctl_fdparm *data;
447 struct sockaddr_in *sin;
448 struct auth_domain *clp;
454 if (size < sizeof(*data))
456 data = (struct nfsctl_fdparm*)buf;
457 err = -EPROTONOSUPPORT;
458 if (data->gd_addr.sa_family != AF_INET)
461 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
465 sin = (struct sockaddr_in *)&data->gd_addr;
468 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
470 clp = auth_unix_lookup(&in6);
474 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
475 auth_domain_put(clp);
480 memset(res,0, NFS_FHSIZE);
481 memcpy(res, &fh.fh_base, fh.fh_size);
489 * write_unlock_ip - Release all locks used by a client
494 * buf: '\n'-terminated C string containing a
495 * presentation format IP address
496 * size: length of C string in @buf
498 * On success: returns zero if all specified locks were released;
499 * returns one if one or more locks were not released
500 * On error: return code is negative errno value
502 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
504 struct sockaddr_storage address;
505 struct sockaddr *sap = (struct sockaddr *)&address;
506 size_t salen = sizeof(address);
513 if (buf[size-1] != '\n')
517 if (qword_get(&buf, fo_path, size) < 0)
520 if (rpc_pton(fo_path, size, sap, salen) == 0)
523 return nlmsvc_unlock_all_by_ip(sap);
527 * write_unlock_fs - Release all locks on a local file system
532 * buf: '\n'-terminated C string containing the
533 * absolute pathname of a local file system
534 * size: length of C string in @buf
536 * On success: returns zero if all specified locks were released;
537 * returns one if one or more locks were not released
538 * On error: return code is negative errno value
540 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
550 if (buf[size-1] != '\n')
554 if (qword_get(&buf, fo_path, size) < 0)
557 error = kern_path(fo_path, 0, &path);
562 * XXX: Needs better sanity checking. Otherwise we could end up
563 * releasing locks on the wrong file system.
566 * 1. Does the path refer to a directory?
567 * 2. Is that directory a mount point, or
568 * 3. Is that directory the root of an exported file system?
570 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
577 * write_filehandle - Get a variable-length NFS file handle by path
579 * On input, the buffer contains a '\n'-terminated C string comprised of
580 * three alphanumeric words separated by whitespace. The string may
581 * contain escape sequences.
585 * domain: client domain name
586 * path: export pathname
587 * maxsize: numeric maximum size of
589 * size: length of C string in @buf
591 * On success: passed-in buffer filled with '\n'-terminated C
592 * string containing a ASCII hex text version
593 * of the NFS file handle;
594 * return code is the size in bytes of the string
595 * On error: return code is negative errno value
597 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
600 int uninitialized_var(maxsize);
603 struct auth_domain *dom;
609 if (buf[size-1] != '\n')
614 len = qword_get(&mesg, dname, size);
619 len = qword_get(&mesg, path, size);
623 len = get_int(&mesg, &maxsize);
627 if (maxsize < NFS_FHSIZE)
629 if (maxsize > NFS3_FHSIZE)
630 maxsize = NFS3_FHSIZE;
632 if (qword_get(&mesg, mesg, size)>0)
635 /* we have all the words, they are in buf.. */
636 dom = unix_domain_find(dname);
640 len = exp_rootfh(dom, path, &fh, maxsize);
641 auth_domain_put(dom);
646 len = SIMPLE_TRANSACTION_LIMIT;
647 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
653 * write_threads - Start NFSD, or report the current number of running threads
659 * On success: passed-in buffer filled with '\n'-terminated C
660 * string numeric value representing the number of
661 * running NFSD threads;
662 * return code is the size in bytes of the string
663 * On error: return code is zero
668 * buf: C string containing an unsigned
669 * integer value representing the
670 * number of NFSD threads to start
671 * size: non-zero length of C string in @buf
673 * On success: NFS service is started;
674 * passed-in buffer filled with '\n'-terminated C
675 * string numeric value representing the number of
676 * running NFSD threads;
677 * return code is the size in bytes of the string
678 * On error: return code is zero or a negative errno value
680 static ssize_t write_threads(struct file *file, char *buf, size_t size)
686 rv = get_int(&mesg, &newthreads);
691 rv = nfsd_svc(NFS_PORT, newthreads);
695 rv = nfsd_nrthreads();
697 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
701 * write_pool_threads - Set or report the current number of threads per pool
710 * buf: C string containing whitespace-
711 * separated unsigned integer values
712 * representing the number of NFSD
713 * threads to start in each pool
714 * size: non-zero length of C string in @buf
716 * On success: passed-in buffer filled with '\n'-terminated C
717 * string containing integer values representing the
718 * number of NFSD threads in each pool;
719 * return code is the size in bytes of the string
720 * On error: return code is zero or a negative errno value
722 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
724 /* if size > 0, look for an array of number of threads per node
725 * and apply them then write out number of threads per node as reply
734 mutex_lock(&nfsd_mutex);
735 npools = nfsd_nrpools();
738 * NFS is shut down. The admin can start it by
739 * writing to the threads file but NOT the pool_threads
740 * file, sorry. Report zero threads.
742 mutex_unlock(&nfsd_mutex);
747 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
749 if (nthreads == NULL)
753 for (i = 0; i < npools; i++) {
754 rv = get_int(&mesg, &nthreads[i]);
756 break; /* fewer numbers than pools */
758 goto out_free; /* syntax error */
763 rv = nfsd_set_nrthreads(i, nthreads);
768 rv = nfsd_get_nrthreads(npools, nthreads);
773 size = SIMPLE_TRANSACTION_LIMIT;
774 for (i = 0; i < npools && size > 0; i++) {
775 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
783 mutex_unlock(&nfsd_mutex);
787 static ssize_t __write_versions(struct file *file, char *buf, size_t size)
790 char *vers, *minorp, sign;
791 int len, num, remaining;
798 /* Cannot change versions without updating
799 * nfsd_serv->sv_xdrsize, and reallocing
800 * rq_argp and rq_resp
803 if (buf[size-1] != '\n')
808 len = qword_get(&mesg, vers, size);
809 if (len <= 0) return -EINVAL;
812 if (sign == '+' || sign == '-')
813 num = simple_strtol((vers+1), &minorp, 0);
815 num = simple_strtol(vers, &minorp, 0);
816 if (*minorp == '.') {
819 minor = simple_strtoul(minorp+1, NULL, 0);
822 if (nfsd_minorversion(minor, sign == '-' ?
823 NFSD_CLEAR : NFSD_SET) < 0)
831 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
838 } while ((len = qword_get(&mesg, vers, size)) > 0);
839 /* If all get turned off, turn them back on, as
840 * having no versions is BAD
842 nfsd_reset_versions();
845 /* Now write current state into reply buffer */
848 remaining = SIMPLE_TRANSACTION_LIMIT;
849 for (num=2 ; num <= 4 ; num++)
850 if (nfsd_vers(num, NFSD_AVAIL)) {
851 len = snprintf(buf, remaining, "%s%c%d", sep,
852 nfsd_vers(num, NFSD_TEST)?'+':'-',
862 if (nfsd_vers(4, NFSD_AVAIL))
863 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
865 len = snprintf(buf, remaining, " %c4.%u",
866 (nfsd_vers(4, NFSD_TEST) &&
867 nfsd_minorversion(minor, NFSD_TEST)) ?
878 len = snprintf(buf, remaining, "\n");
885 * write_versions - Set or report the available NFS protocol versions
891 * On success: passed-in buffer filled with '\n'-terminated C
892 * string containing positive or negative integer
893 * values representing the current status of each
895 * return code is the size in bytes of the string
896 * On error: return code is zero or a negative errno value
901 * buf: C string containing whitespace-
902 * separated positive or negative
903 * integer values representing NFS
904 * protocol versions to enable ("+n")
906 * size: non-zero length of C string in @buf
908 * On success: status of zero or more protocol versions has
909 * been updated; passed-in buffer filled with
910 * '\n'-terminated C string containing positive
911 * or negative integer values representing the
912 * current status of each protocol version;
913 * return code is the size in bytes of the string
914 * On error: return code is zero or a negative errno value
916 static ssize_t write_versions(struct file *file, char *buf, size_t size)
920 mutex_lock(&nfsd_mutex);
921 rv = __write_versions(file, buf, size);
922 mutex_unlock(&nfsd_mutex);
927 * Zero-length write. Return a list of NFSD's current listener
930 static ssize_t __write_ports_names(char *buf)
932 if (nfsd_serv == NULL)
934 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
938 * A single 'fd' number was written, in which case it must be for
939 * a socket of a supported family/protocol, and we use it as an
942 static ssize_t __write_ports_addfd(char *buf)
947 err = get_int(&mesg, &fd);
948 if (err != 0 || fd < 0)
951 err = nfsd_create_serv();
959 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
964 /* Decrease the count, but don't shut down the service */
965 nfsd_serv->sv_nrthreads--;
970 * A '-' followed by the 'name' of a socket means we close the socket.
972 static ssize_t __write_ports_delfd(char *buf)
977 toclose = kstrdup(buf + 1, GFP_KERNEL);
981 if (nfsd_serv != NULL)
982 len = svc_sock_names(nfsd_serv, buf,
983 SIMPLE_TRANSACTION_LIMIT, toclose);
992 * A transport listener is added by writing it's transport name and
995 static ssize_t __write_ports_addxprt(char *buf)
1000 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
1003 if (port < 1 || port > USHORT_MAX)
1006 err = nfsd_create_serv();
1010 err = svc_create_xprt(nfsd_serv, transport,
1011 PF_INET, port, SVC_SOCK_ANONYMOUS);
1013 /* Give a reasonable perror msg for bad transport string */
1015 err = -EPROTONOSUPPORT;
1022 * A transport listener is removed by writing a "-", it's transport
1023 * name, and it's port number.
1025 static ssize_t __write_ports_delxprt(char *buf)
1027 struct svc_xprt *xprt;
1031 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
1034 if (port < 1 || port > USHORT_MAX || nfsd_serv == NULL)
1037 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
1041 svc_close_xprt(xprt);
1046 static ssize_t __write_ports(struct file *file, char *buf, size_t size)
1049 return __write_ports_names(buf);
1051 if (isdigit(buf[0]))
1052 return __write_ports_addfd(buf);
1054 if (buf[0] == '-' && isdigit(buf[1]))
1055 return __write_ports_delfd(buf);
1057 if (isalpha(buf[0]))
1058 return __write_ports_addxprt(buf);
1060 if (buf[0] == '-' && isalpha(buf[1]))
1061 return __write_ports_delxprt(buf);
1067 * write_ports - Pass a socket file descriptor or transport name to listen on
1073 * On success: passed-in buffer filled with a '\n'-terminated C
1074 * string containing a whitespace-separated list of
1075 * named NFSD listeners;
1076 * return code is the size in bytes of the string
1077 * On error: return code is zero or a negative errno value
1082 * buf: C string containing an unsigned
1083 * integer value representing a bound
1084 * but unconnected socket that is to be
1085 * used as an NFSD listener; listen(3)
1086 * must be called for a SOCK_STREAM
1087 * socket, otherwise it is ignored
1088 * size: non-zero length of C string in @buf
1090 * On success: NFS service is started;
1091 * passed-in buffer filled with a '\n'-terminated C
1092 * string containing a unique alphanumeric name of
1094 * return code is the size in bytes of the string
1095 * On error: return code is a negative errno value
1100 * buf: C string containing a "-" followed
1101 * by an integer value representing a
1102 * previously passed in socket file
1104 * size: non-zero length of C string in @buf
1106 * On success: NFS service no longer listens on that socket;
1107 * passed-in buffer filled with a '\n'-terminated C
1108 * string containing a unique name of the listener;
1109 * return code is the size in bytes of the string
1110 * On error: return code is a negative errno value
1115 * buf: C string containing a transport
1116 * name and an unsigned integer value
1117 * representing the port to listen on,
1118 * separated by whitespace
1119 * size: non-zero length of C string in @buf
1121 * On success: returns zero; NFS service is started
1122 * On error: return code is a negative errno value
1127 * buf: C string containing a "-" followed
1128 * by a transport name and an unsigned
1129 * integer value representing the port
1130 * to listen on, separated by whitespace
1131 * size: non-zero length of C string in @buf
1133 * On success: returns zero; NFS service no longer listens
1135 * On error: return code is a negative errno value
1137 static ssize_t write_ports(struct file *file, char *buf, size_t size)
1141 mutex_lock(&nfsd_mutex);
1142 rv = __write_ports(file, buf, size);
1143 mutex_unlock(&nfsd_mutex);
1148 int nfsd_max_blksize;
1151 * write_maxblksize - Set or report the current NFS blksize
1160 * buf: C string containing an unsigned
1161 * integer value representing the new
1163 * size: non-zero length of C string in @buf
1165 * On success: passed-in buffer filled with '\n'-terminated C string
1166 * containing numeric value of the current NFS blksize
1168 * return code is the size in bytes of the string
1169 * On error: return code is zero or a negative errno value
1171 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
1176 int rv = get_int(&mesg, &bsize);
1179 /* force bsize into allowed range and
1180 * required alignment.
1184 if (bsize > NFSSVC_MAXBLKSIZE)
1185 bsize = NFSSVC_MAXBLKSIZE;
1187 mutex_lock(&nfsd_mutex);
1188 if (nfsd_serv && nfsd_serv->sv_nrthreads) {
1189 mutex_unlock(&nfsd_mutex);
1192 nfsd_max_blksize = bsize;
1193 mutex_unlock(&nfsd_mutex);
1196 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
1200 #ifdef CONFIG_NFSD_V4
1201 extern time_t nfs4_leasetime(void);
1203 static ssize_t __write_leasetime(struct file *file, char *buf, size_t size)
1205 /* if size > 10 seconds, call
1206 * nfs4_reset_lease() then write out the new lease (seconds) as reply
1214 rv = get_int(&mesg, &lease);
1217 if (lease < 10 || lease > 3600)
1219 nfs4_reset_lease(lease);
1222 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n",
1227 * write_leasetime - Set or report the current NFSv4 lease time
1236 * buf: C string containing an unsigned
1237 * integer value representing the new
1238 * NFSv4 lease expiry time
1239 * size: non-zero length of C string in @buf
1241 * On success: passed-in buffer filled with '\n'-terminated C
1242 * string containing unsigned integer value of the
1243 * current lease expiry time;
1244 * return code is the size in bytes of the string
1245 * On error: return code is zero or a negative errno value
1247 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
1251 mutex_lock(&nfsd_mutex);
1252 rv = __write_leasetime(file, buf, size);
1253 mutex_unlock(&nfsd_mutex);
1257 extern char *nfs4_recoverydir(void);
1259 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
1268 if (size > PATH_MAX || buf[size-1] != '\n')
1273 len = qword_get(&mesg, recdir, size);
1277 status = nfs4_reset_recoverydir(recdir);
1280 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1281 nfs4_recoverydir());
1285 * write_recoverydir - Set or report the pathname of the recovery directory
1294 * buf: C string containing the pathname
1295 * of the directory on a local file
1296 * system containing permanent NFSv4
1298 * size: non-zero length of C string in @buf
1300 * On success: passed-in buffer filled with '\n'-terminated C string
1301 * containing the current recovery pathname setting;
1302 * return code is the size in bytes of the string
1303 * On error: return code is zero or a negative errno value
1305 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1309 mutex_lock(&nfsd_mutex);
1310 rv = __write_recoverydir(file, buf, size);
1311 mutex_unlock(&nfsd_mutex);
1317 /*----------------------------------------------------------------------------*/
1319 * populating the filesystem.
1322 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1324 static struct tree_descr nfsd_files[] = {
1325 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
1326 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
1327 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
1328 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
1329 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
1330 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
1331 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
1332 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
1333 [NFSD_FO_UnlockIP] = {"unlock_ip",
1334 &transaction_ops, S_IWUSR|S_IRUSR},
1335 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1336 &transaction_ops, S_IWUSR|S_IRUSR},
1337 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1338 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
1339 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
1340 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
1341 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
1342 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
1343 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
1344 #ifdef CONFIG_NFSD_V4
1345 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
1346 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
1350 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1353 static int nfsd_get_sb(struct file_system_type *fs_type,
1354 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
1356 return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt);
1359 static struct file_system_type nfsd_fs_type = {
1360 .owner = THIS_MODULE,
1362 .get_sb = nfsd_get_sb,
1363 .kill_sb = kill_litter_super,
1366 #ifdef CONFIG_PROC_FS
1367 static int create_proc_exports_entry(void)
1369 struct proc_dir_entry *entry;
1371 entry = proc_mkdir("fs/nfs", NULL);
1374 entry = proc_create("exports", 0, entry, &exports_operations);
1379 #else /* CONFIG_PROC_FS */
1380 static int create_proc_exports_entry(void)
1386 static int __init init_nfsd(void)
1389 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1391 retval = nfs4_state_init(); /* nfs4 locking state */
1394 nfsd_stat_init(); /* Statistics */
1395 retval = nfsd_reply_cache_init();
1398 retval = nfsd_export_init();
1400 goto out_free_cache;
1401 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1402 retval = nfsd_idmap_init();
1404 goto out_free_lockd;
1405 retval = create_proc_exports_entry();
1407 goto out_free_idmap;
1408 retval = register_filesystem(&nfsd_fs_type);
1413 remove_proc_entry("fs/nfs/exports", NULL);
1414 remove_proc_entry("fs/nfs", NULL);
1416 nfsd_idmap_shutdown();
1418 nfsd_lockd_shutdown();
1419 nfsd_export_shutdown();
1421 nfsd_reply_cache_shutdown();
1423 nfsd_stat_shutdown();
1428 static void __exit exit_nfsd(void)
1430 nfsd_export_shutdown();
1431 nfsd_reply_cache_shutdown();
1432 remove_proc_entry("fs/nfs/exports", NULL);
1433 remove_proc_entry("fs/nfs", NULL);
1434 nfsd_stat_shutdown();
1435 nfsd_lockd_shutdown();
1436 nfsd_idmap_shutdown();
1438 unregister_filesystem(&nfsd_fs_type);
1441 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1442 MODULE_LICENSE("GPL");
1443 module_init(init_nfsd)
1444 module_exit(exit_nfsd)