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/nfsd/syscall.h>
13 #include <linux/lockd/lockd.h>
14 #include <linux/sunrpc/clnt.h>
15 #include <linux/sunrpc/gss_api.h>
22 * We have a single directory with several nodes in it.
26 #ifdef CONFIG_NFSD_DEPRECATED
46 NFSD_SupportedEnctypes,
48 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
49 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
59 * write() for these nodes.
61 #ifdef CONFIG_NFSD_DEPRECATED
62 static ssize_t write_svc(struct file *file, char *buf, size_t size);
63 static ssize_t write_add(struct file *file, char *buf, size_t size);
64 static ssize_t write_del(struct file *file, char *buf, size_t size);
65 static ssize_t write_export(struct file *file, char *buf, size_t size);
66 static ssize_t write_unexport(struct file *file, char *buf, size_t size);
67 static ssize_t write_getfd(struct file *file, char *buf, size_t size);
68 static ssize_t write_getfs(struct file *file, char *buf, size_t size);
70 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
71 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
72 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
73 static ssize_t write_threads(struct file *file, char *buf, size_t size);
74 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
75 static ssize_t write_versions(struct file *file, char *buf, size_t size);
76 static ssize_t write_ports(struct file *file, char *buf, size_t size);
77 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
79 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
80 static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
81 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
84 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
85 #ifdef CONFIG_NFSD_DEPRECATED
86 [NFSD_Svc] = write_svc,
87 [NFSD_Add] = write_add,
88 [NFSD_Del] = write_del,
89 [NFSD_Export] = write_export,
90 [NFSD_Unexport] = write_unexport,
91 [NFSD_Getfd] = write_getfd,
92 [NFSD_Getfs] = write_getfs,
94 [NFSD_Fh] = write_filehandle,
95 [NFSD_FO_UnlockIP] = write_unlock_ip,
96 [NFSD_FO_UnlockFS] = write_unlock_fs,
97 [NFSD_Threads] = write_threads,
98 [NFSD_Pool_Threads] = write_pool_threads,
99 [NFSD_Versions] = write_versions,
100 [NFSD_Ports] = write_ports,
101 [NFSD_MaxBlkSize] = write_maxblksize,
102 #ifdef CONFIG_NFSD_V4
103 [NFSD_Leasetime] = write_leasetime,
104 [NFSD_Gracetime] = write_gracetime,
105 [NFSD_RecoveryDir] = write_recoverydir,
109 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
111 ino_t ino = file->f_path.dentry->d_inode->i_ino;
115 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
118 data = simple_transaction_get(file, buf, size);
120 return PTR_ERR(data);
122 rv = write_op[ino](file, data, size);
124 simple_transaction_set(file, rv);
130 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
132 #ifdef CONFIG_NFSD_DEPRECATED
134 if (file->f_dentry->d_name.name[0] == '.' && !warned) {
136 "Warning: \"%s\" uses deprecated NFSD interface: %s."
137 " This will be removed in 2.6.40\n",
138 current->comm, file->f_dentry->d_name.name);
142 if (! file->private_data) {
143 /* An attempt to read a transaction file without writing
144 * causes a 0-byte write so that the file can return
147 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
151 return simple_transaction_read(file, buf, size, pos);
154 static const struct file_operations transaction_ops = {
155 .write = nfsctl_transaction_write,
156 .read = nfsctl_transaction_read,
157 .release = simple_transaction_release,
158 .llseek = default_llseek,
161 static int exports_open(struct inode *inode, struct file *file)
163 return seq_open(file, &nfs_exports_op);
166 static const struct file_operations exports_operations = {
167 .open = exports_open,
170 .release = seq_release,
171 .owner = THIS_MODULE,
174 static int export_features_show(struct seq_file *m, void *v)
176 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
180 static int export_features_open(struct inode *inode, struct file *file)
182 return single_open(file, export_features_show, NULL);
185 static struct file_operations export_features_operations = {
186 .open = export_features_open,
189 .release = single_release,
192 #ifdef CONFIG_SUNRPC_GSS
193 static int supported_enctypes_show(struct seq_file *m, void *v)
195 struct gss_api_mech *k5mech;
197 k5mech = gss_mech_get_by_name("krb5");
200 if (k5mech->gm_upcall_enctypes != NULL)
201 seq_printf(m, k5mech->gm_upcall_enctypes);
202 gss_mech_put(k5mech);
207 static int supported_enctypes_open(struct inode *inode, struct file *file)
209 return single_open(file, supported_enctypes_show, NULL);
212 static struct file_operations supported_enctypes_ops = {
213 .open = supported_enctypes_open,
216 .release = single_release,
218 #endif /* CONFIG_SUNRPC_GSS */
220 extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
221 extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
223 static const struct file_operations pool_stats_operations = {
224 .open = nfsd_pool_stats_open,
227 .release = nfsd_pool_stats_release,
228 .owner = THIS_MODULE,
231 /*----------------------------------------------------------------------------*/
233 * payload - write methods
236 #ifdef CONFIG_NFSD_DEPRECATED
238 * write_svc - Start kernel's NFSD server
240 * Deprecated. /proc/fs/nfsd/threads is preferred.
241 * Function remains to support old versions of nfs-utils.
244 * buf: struct nfsctl_svc
245 * svc_port: port number of this
247 * svc_nthreads: number of threads to start
248 * size: size in bytes of passed in nfsctl_svc
250 * On success: returns zero
251 * On error: return code is negative errno value
253 static ssize_t write_svc(struct file *file, char *buf, size_t size)
255 struct nfsctl_svc *data;
257 if (size < sizeof(*data))
259 data = (struct nfsctl_svc*) buf;
260 err = nfsd_svc(data->svc_port, data->svc_nthreads);
267 * write_add - Add or modify client entry in auth unix cache
269 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
270 * Function remains to support old versions of nfs-utils.
273 * buf: struct nfsctl_client
274 * cl_ident: '\0'-terminated C string
275 * containing domain name
277 * cl_naddr: no. of items in cl_addrlist
278 * cl_addrlist: array of client addresses
279 * cl_fhkeytype: ignored
280 * cl_fhkeylen: ignored
282 * size: size in bytes of passed in nfsctl_client
284 * On success: returns zero
285 * On error: return code is negative errno value
287 * Note: Only AF_INET client addresses are passed in, since
288 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
290 static ssize_t write_add(struct file *file, char *buf, size_t size)
292 struct nfsctl_client *data;
293 if (size < sizeof(*data))
295 data = (struct nfsctl_client *)buf;
296 return exp_addclient(data);
300 * write_del - Remove client from auth unix cache
302 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred.
303 * Function remains to support old versions of nfs-utils.
306 * buf: struct nfsctl_client
307 * cl_ident: '\0'-terminated C string
308 * containing domain name
311 * cl_addrlist: ignored
312 * cl_fhkeytype: ignored
313 * cl_fhkeylen: ignored
315 * size: size in bytes of passed in nfsctl_client
317 * On success: returns zero
318 * On error: return code is negative errno value
320 * Note: Only AF_INET client addresses are passed in, since
321 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
323 static ssize_t write_del(struct file *file, char *buf, size_t size)
325 struct nfsctl_client *data;
326 if (size < sizeof(*data))
328 data = (struct nfsctl_client *)buf;
329 return exp_delclient(data);
333 * write_export - Export part or all of a local file system
335 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
336 * Function remains to support old versions of nfs-utils.
339 * buf: struct nfsctl_export
340 * ex_client: '\0'-terminated C string
341 * containing domain name
342 * of client allowed to access
344 * ex_path: '\0'-terminated C string
345 * containing pathname of
346 * directory in local file system
347 * ex_dev: fsid to use for this export
349 * ex_flags: export flags for this export
350 * ex_anon_uid: UID to use for anonymous
352 * ex_anon_gid: GID to use for anonymous
354 * size: size in bytes of passed in nfsctl_export
356 * On success: returns zero
357 * On error: return code is negative errno value
359 static ssize_t write_export(struct file *file, char *buf, size_t size)
361 struct nfsctl_export *data;
362 if (size < sizeof(*data))
364 data = (struct nfsctl_export*)buf;
365 return exp_export(data);
369 * write_unexport - Unexport a previously exported file system
371 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
372 * Function remains to support old versions of nfs-utils.
375 * buf: struct nfsctl_export
376 * ex_client: '\0'-terminated C string
377 * containing domain name
378 * of client no longer allowed
379 * to access this export
380 * ex_path: '\0'-terminated C string
381 * containing pathname of
382 * directory in local file system
386 * ex_anon_uid: ignored
387 * ex_anon_gid: ignored
388 * size: size in bytes of passed in nfsctl_export
390 * On success: returns zero
391 * On error: return code is negative errno value
393 static ssize_t write_unexport(struct file *file, char *buf, size_t size)
395 struct nfsctl_export *data;
397 if (size < sizeof(*data))
399 data = (struct nfsctl_export*)buf;
400 return exp_unexport(data);
404 * write_getfs - Get a variable-length NFS file handle by path
406 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
407 * Function remains to support old versions of nfs-utils.
410 * buf: struct nfsctl_fsparm
411 * gd_addr: socket address of client
412 * gd_path: '\0'-terminated C string
413 * containing pathname of
414 * directory in local file system
415 * gd_maxlen: maximum size of returned file
417 * size: size in bytes of passed in nfsctl_fsparm
419 * On success: passed-in buffer filled with a knfsd_fh structure
420 * (a variable-length raw NFS file handle);
421 * return code is the size in bytes of the file handle
422 * On error: return code is negative errno value
424 * Note: Only AF_INET client addresses are passed in, since gd_addr
425 * is the same size as a struct sockaddr_in.
427 static ssize_t write_getfs(struct file *file, char *buf, size_t size)
429 struct nfsctl_fsparm *data;
430 struct sockaddr_in *sin;
431 struct auth_domain *clp;
433 struct knfsd_fh *res;
436 if (size < sizeof(*data))
438 data = (struct nfsctl_fsparm*)buf;
439 err = -EPROTONOSUPPORT;
440 if (data->gd_addr.sa_family != AF_INET)
442 sin = (struct sockaddr_in *)&data->gd_addr;
443 if (data->gd_maxlen > NFS3_FHSIZE)
444 data->gd_maxlen = NFS3_FHSIZE;
446 res = (struct knfsd_fh*)buf;
450 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
452 clp = auth_unix_lookup(&init_net, &in6);
456 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
457 auth_domain_put(clp);
461 err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
467 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
469 * Deprecated. /proc/fs/nfsd/filehandle is preferred.
470 * Function remains to support old versions of nfs-utils.
473 * buf: struct nfsctl_fdparm
474 * gd_addr: socket address of client
475 * gd_path: '\0'-terminated C string
476 * containing pathname of
477 * directory in local file system
478 * gd_version: fdparm structure version
479 * size: size in bytes of passed in nfsctl_fdparm
481 * On success: passed-in buffer filled with nfsctl_res
482 * (a fixed-length raw NFS file handle);
483 * return code is the size in bytes of the file handle
484 * On error: return code is negative errno value
486 * Note: Only AF_INET client addresses are passed in, since gd_addr
487 * is the same size as a struct sockaddr_in.
489 static ssize_t write_getfd(struct file *file, char *buf, size_t size)
491 struct nfsctl_fdparm *data;
492 struct sockaddr_in *sin;
493 struct auth_domain *clp;
499 if (size < sizeof(*data))
501 data = (struct nfsctl_fdparm*)buf;
502 err = -EPROTONOSUPPORT;
503 if (data->gd_addr.sa_family != AF_INET)
506 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
510 sin = (struct sockaddr_in *)&data->gd_addr;
513 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
515 clp = auth_unix_lookup(&init_net, &in6);
519 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
520 auth_domain_put(clp);
525 memset(res,0, NFS_FHSIZE);
526 memcpy(res, &fh.fh_base, fh.fh_size);
532 #endif /* CONFIG_NFSD_DEPRECATED */
535 * write_unlock_ip - Release all locks used by a client
540 * buf: '\n'-terminated C string containing a
541 * presentation format IP address
542 * size: length of C string in @buf
544 * On success: returns zero if all specified locks were released;
545 * returns one if one or more locks were not released
546 * On error: return code is negative errno value
548 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
550 struct sockaddr_storage address;
551 struct sockaddr *sap = (struct sockaddr *)&address;
552 size_t salen = sizeof(address);
559 if (buf[size-1] != '\n')
563 if (qword_get(&buf, fo_path, size) < 0)
566 if (rpc_pton(fo_path, size, sap, salen) == 0)
569 return nlmsvc_unlock_all_by_ip(sap);
573 * write_unlock_fs - Release all locks on a local file system
578 * buf: '\n'-terminated C string containing the
579 * absolute pathname of a local file system
580 * size: length of C string in @buf
582 * On success: returns zero if all specified locks were released;
583 * returns one if one or more locks were not released
584 * On error: return code is negative errno value
586 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
596 if (buf[size-1] != '\n')
600 if (qword_get(&buf, fo_path, size) < 0)
603 error = kern_path(fo_path, 0, &path);
608 * XXX: Needs better sanity checking. Otherwise we could end up
609 * releasing locks on the wrong file system.
612 * 1. Does the path refer to a directory?
613 * 2. Is that directory a mount point, or
614 * 3. Is that directory the root of an exported file system?
616 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
623 * write_filehandle - Get a variable-length NFS file handle by path
625 * On input, the buffer contains a '\n'-terminated C string comprised of
626 * three alphanumeric words separated by whitespace. The string may
627 * contain escape sequences.
631 * domain: client domain name
632 * path: export pathname
633 * maxsize: numeric maximum size of
635 * size: length of C string in @buf
637 * On success: passed-in buffer filled with '\n'-terminated C
638 * string containing a ASCII hex text version
639 * of the NFS file handle;
640 * return code is the size in bytes of the string
641 * On error: return code is negative errno value
643 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
646 int uninitialized_var(maxsize);
649 struct auth_domain *dom;
655 if (buf[size-1] != '\n')
660 len = qword_get(&mesg, dname, size);
665 len = qword_get(&mesg, path, size);
669 len = get_int(&mesg, &maxsize);
673 if (maxsize < NFS_FHSIZE)
675 if (maxsize > NFS3_FHSIZE)
676 maxsize = NFS3_FHSIZE;
678 if (qword_get(&mesg, mesg, size)>0)
681 /* we have all the words, they are in buf.. */
682 dom = unix_domain_find(dname);
686 len = exp_rootfh(dom, path, &fh, maxsize);
687 auth_domain_put(dom);
692 len = SIMPLE_TRANSACTION_LIMIT;
693 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
699 * write_threads - Start NFSD, or report the current number of running threads
705 * On success: passed-in buffer filled with '\n'-terminated C
706 * string numeric value representing the number of
707 * running NFSD threads;
708 * return code is the size in bytes of the string
709 * On error: return code is zero
714 * buf: C string containing an unsigned
715 * integer value representing the
716 * number of NFSD threads to start
717 * size: non-zero length of C string in @buf
719 * On success: NFS service is started;
720 * passed-in buffer filled with '\n'-terminated C
721 * string numeric value representing the number of
722 * running NFSD threads;
723 * return code is the size in bytes of the string
724 * On error: return code is zero or a negative errno value
726 static ssize_t write_threads(struct file *file, char *buf, size_t size)
732 rv = get_int(&mesg, &newthreads);
737 rv = nfsd_svc(NFS_PORT, newthreads);
741 rv = nfsd_nrthreads();
743 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
747 * write_pool_threads - Set or report the current number of threads per pool
756 * buf: C string containing whitespace-
757 * separated unsigned integer values
758 * representing the number of NFSD
759 * threads to start in each pool
760 * size: non-zero length of C string in @buf
762 * On success: passed-in buffer filled with '\n'-terminated C
763 * string containing integer values representing the
764 * number of NFSD threads in each pool;
765 * return code is the size in bytes of the string
766 * On error: return code is zero or a negative errno value
768 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
770 /* if size > 0, look for an array of number of threads per node
771 * and apply them then write out number of threads per node as reply
780 mutex_lock(&nfsd_mutex);
781 npools = nfsd_nrpools();
784 * NFS is shut down. The admin can start it by
785 * writing to the threads file but NOT the pool_threads
786 * file, sorry. Report zero threads.
788 mutex_unlock(&nfsd_mutex);
793 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
795 if (nthreads == NULL)
799 for (i = 0; i < npools; i++) {
800 rv = get_int(&mesg, &nthreads[i]);
802 break; /* fewer numbers than pools */
804 goto out_free; /* syntax error */
809 rv = nfsd_set_nrthreads(i, nthreads);
814 rv = nfsd_get_nrthreads(npools, nthreads);
819 size = SIMPLE_TRANSACTION_LIMIT;
820 for (i = 0; i < npools && size > 0; i++) {
821 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
829 mutex_unlock(&nfsd_mutex);
833 static ssize_t __write_versions(struct file *file, char *buf, size_t size)
836 char *vers, *minorp, sign;
837 int len, num, remaining;
844 /* Cannot change versions without updating
845 * nfsd_serv->sv_xdrsize, and reallocing
846 * rq_argp and rq_resp
849 if (buf[size-1] != '\n')
854 len = qword_get(&mesg, vers, size);
855 if (len <= 0) return -EINVAL;
858 if (sign == '+' || sign == '-')
859 num = simple_strtol((vers+1), &minorp, 0);
861 num = simple_strtol(vers, &minorp, 0);
862 if (*minorp == '.') {
865 minor = simple_strtoul(minorp+1, NULL, 0);
868 if (nfsd_minorversion(minor, sign == '-' ?
869 NFSD_CLEAR : NFSD_SET) < 0)
877 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
884 } while ((len = qword_get(&mesg, vers, size)) > 0);
885 /* If all get turned off, turn them back on, as
886 * having no versions is BAD
888 nfsd_reset_versions();
891 /* Now write current state into reply buffer */
894 remaining = SIMPLE_TRANSACTION_LIMIT;
895 for (num=2 ; num <= 4 ; num++)
896 if (nfsd_vers(num, NFSD_AVAIL)) {
897 len = snprintf(buf, remaining, "%s%c%d", sep,
898 nfsd_vers(num, NFSD_TEST)?'+':'-',
908 if (nfsd_vers(4, NFSD_AVAIL))
909 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
911 len = snprintf(buf, remaining, " %c4.%u",
912 (nfsd_vers(4, NFSD_TEST) &&
913 nfsd_minorversion(minor, NFSD_TEST)) ?
924 len = snprintf(buf, remaining, "\n");
931 * write_versions - Set or report the available NFS protocol versions
937 * On success: passed-in buffer filled with '\n'-terminated C
938 * string containing positive or negative integer
939 * values representing the current status of each
941 * return code is the size in bytes of the string
942 * On error: return code is zero or a negative errno value
947 * buf: C string containing whitespace-
948 * separated positive or negative
949 * integer values representing NFS
950 * protocol versions to enable ("+n")
952 * size: non-zero length of C string in @buf
954 * On success: status of zero or more protocol versions has
955 * been updated; passed-in buffer filled with
956 * '\n'-terminated C string containing positive
957 * or negative integer values representing the
958 * current status of each protocol version;
959 * return code is the size in bytes of the string
960 * On error: return code is zero or a negative errno value
962 static ssize_t write_versions(struct file *file, char *buf, size_t size)
966 mutex_lock(&nfsd_mutex);
967 rv = __write_versions(file, buf, size);
968 mutex_unlock(&nfsd_mutex);
973 * Zero-length write. Return a list of NFSD's current listener
976 static ssize_t __write_ports_names(char *buf)
978 if (nfsd_serv == NULL)
980 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
984 * A single 'fd' number was written, in which case it must be for
985 * a socket of a supported family/protocol, and we use it as an
988 static ssize_t __write_ports_addfd(char *buf)
993 err = get_int(&mesg, &fd);
994 if (err != 0 || fd < 0)
997 err = nfsd_create_serv();
1001 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
1003 svc_destroy(nfsd_serv);
1007 /* Decrease the count, but don't shut down the service */
1008 nfsd_serv->sv_nrthreads--;
1013 * A '-' followed by the 'name' of a socket means we close the socket.
1015 static ssize_t __write_ports_delfd(char *buf)
1020 toclose = kstrdup(buf + 1, GFP_KERNEL);
1021 if (toclose == NULL)
1024 if (nfsd_serv != NULL)
1025 len = svc_sock_names(nfsd_serv, buf,
1026 SIMPLE_TRANSACTION_LIMIT, toclose);
1032 * A transport listener is added by writing it's transport name and
1035 static ssize_t __write_ports_addxprt(char *buf)
1038 struct svc_xprt *xprt;
1041 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
1044 if (port < 1 || port > USHRT_MAX)
1047 err = nfsd_create_serv();
1051 err = svc_create_xprt(nfsd_serv, transport, &init_net,
1052 PF_INET, port, SVC_SOCK_ANONYMOUS);
1056 err = svc_create_xprt(nfsd_serv, transport, &init_net,
1057 PF_INET6, port, SVC_SOCK_ANONYMOUS);
1058 if (err < 0 && err != -EAFNOSUPPORT)
1061 /* Decrease the count, but don't shut down the service */
1062 nfsd_serv->sv_nrthreads--;
1065 xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
1067 svc_close_xprt(xprt);
1071 svc_destroy(nfsd_serv);
1076 * A transport listener is removed by writing a "-", it's transport
1077 * name, and it's port number.
1079 static ssize_t __write_ports_delxprt(char *buf)
1081 struct svc_xprt *xprt;
1085 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
1088 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
1091 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
1095 svc_close_xprt(xprt);
1100 static ssize_t __write_ports(struct file *file, char *buf, size_t size)
1103 return __write_ports_names(buf);
1105 if (isdigit(buf[0]))
1106 return __write_ports_addfd(buf);
1108 if (buf[0] == '-' && isdigit(buf[1]))
1109 return __write_ports_delfd(buf);
1111 if (isalpha(buf[0]))
1112 return __write_ports_addxprt(buf);
1114 if (buf[0] == '-' && isalpha(buf[1]))
1115 return __write_ports_delxprt(buf);
1121 * write_ports - Pass a socket file descriptor or transport name to listen on
1127 * On success: passed-in buffer filled with a '\n'-terminated C
1128 * string containing a whitespace-separated list of
1129 * named NFSD listeners;
1130 * return code is the size in bytes of the string
1131 * On error: return code is zero or a negative errno value
1136 * buf: C string containing an unsigned
1137 * integer value representing a bound
1138 * but unconnected socket that is to be
1139 * used as an NFSD listener; listen(3)
1140 * must be called for a SOCK_STREAM
1141 * socket, otherwise it is ignored
1142 * size: non-zero length of C string in @buf
1144 * On success: NFS service is started;
1145 * passed-in buffer filled with a '\n'-terminated C
1146 * string containing a unique alphanumeric name of
1148 * return code is the size in bytes of the string
1149 * On error: return code is a negative errno value
1154 * buf: C string containing a "-" followed
1155 * by an integer value representing a
1156 * previously passed in socket file
1158 * size: non-zero length of C string in @buf
1160 * On success: NFS service no longer listens on that socket;
1161 * passed-in buffer filled with a '\n'-terminated C
1162 * string containing a unique name of the listener;
1163 * return code is the size in bytes of the string
1164 * On error: return code is a negative errno value
1169 * buf: C string containing a transport
1170 * name and an unsigned integer value
1171 * representing the port to listen on,
1172 * separated by whitespace
1173 * size: non-zero length of C string in @buf
1175 * On success: returns zero; NFS service is started
1176 * On error: return code is a negative errno value
1181 * buf: C string containing a "-" followed
1182 * by a transport name and an unsigned
1183 * integer value representing the port
1184 * to listen on, separated by whitespace
1185 * size: non-zero length of C string in @buf
1187 * On success: returns zero; NFS service no longer listens
1189 * On error: return code is a negative errno value
1191 static ssize_t write_ports(struct file *file, char *buf, size_t size)
1195 mutex_lock(&nfsd_mutex);
1196 rv = __write_ports(file, buf, size);
1197 mutex_unlock(&nfsd_mutex);
1202 int nfsd_max_blksize;
1205 * write_maxblksize - Set or report the current NFS blksize
1214 * buf: C string containing an unsigned
1215 * integer value representing the new
1217 * size: non-zero length of C string in @buf
1219 * On success: passed-in buffer filled with '\n'-terminated C string
1220 * containing numeric value of the current NFS blksize
1222 * return code is the size in bytes of the string
1223 * On error: return code is zero or a negative errno value
1225 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
1230 int rv = get_int(&mesg, &bsize);
1233 /* force bsize into allowed range and
1234 * required alignment.
1238 if (bsize > NFSSVC_MAXBLKSIZE)
1239 bsize = NFSSVC_MAXBLKSIZE;
1241 mutex_lock(&nfsd_mutex);
1243 mutex_unlock(&nfsd_mutex);
1246 nfsd_max_blksize = bsize;
1247 mutex_unlock(&nfsd_mutex);
1250 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
1254 #ifdef CONFIG_NFSD_V4
1255 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
1263 rv = get_int(&mesg, &i);
1267 * Some sanity checking. We don't have a reason for
1268 * these particular numbers, but problems with the
1270 * - Too short: the briefest network outage may
1271 * cause clients to lose all their locks. Also,
1272 * the frequent polling may be wasteful.
1273 * - Too long: do you really want reboot recovery
1274 * to take more than an hour? Or to make other
1275 * clients wait an hour before being able to
1276 * revoke a dead client's locks?
1278 if (i < 10 || i > 3600)
1283 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
1286 static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
1290 mutex_lock(&nfsd_mutex);
1291 rv = __nfsd4_write_time(file, buf, size, time);
1292 mutex_unlock(&nfsd_mutex);
1297 * write_leasetime - Set or report the current NFSv4 lease time
1306 * buf: C string containing an unsigned
1307 * integer value representing the new
1308 * NFSv4 lease expiry time
1309 * size: non-zero length of C string in @buf
1311 * On success: passed-in buffer filled with '\n'-terminated C
1312 * string containing unsigned integer value of the
1313 * current lease expiry time;
1314 * return code is the size in bytes of the string
1315 * On error: return code is zero or a negative errno value
1317 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
1319 return nfsd4_write_time(file, buf, size, &nfsd4_lease);
1323 * write_gracetime - Set or report current NFSv4 grace period time
1325 * As above, but sets the time of the NFSv4 grace period.
1327 * Note this should never be set to less than the *previous*
1328 * lease-period time, but we don't try to enforce this. (In the common
1329 * case (a new boot), we don't know what the previous lease time was
1332 static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
1334 return nfsd4_write_time(file, buf, size, &nfsd4_grace);
1337 extern char *nfs4_recoverydir(void);
1339 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
1348 if (size > PATH_MAX || buf[size-1] != '\n')
1353 len = qword_get(&mesg, recdir, size);
1357 status = nfs4_reset_recoverydir(recdir);
1362 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1363 nfs4_recoverydir());
1367 * write_recoverydir - Set or report the pathname of the recovery directory
1376 * buf: C string containing the pathname
1377 * of the directory on a local file
1378 * system containing permanent NFSv4
1380 * size: non-zero length of C string in @buf
1382 * On success: passed-in buffer filled with '\n'-terminated C string
1383 * containing the current recovery pathname setting;
1384 * return code is the size in bytes of the string
1385 * On error: return code is zero or a negative errno value
1387 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1391 mutex_lock(&nfsd_mutex);
1392 rv = __write_recoverydir(file, buf, size);
1393 mutex_unlock(&nfsd_mutex);
1399 /*----------------------------------------------------------------------------*/
1401 * populating the filesystem.
1404 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1406 static struct tree_descr nfsd_files[] = {
1407 #ifdef CONFIG_NFSD_DEPRECATED
1408 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
1409 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
1410 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
1411 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
1412 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
1413 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
1414 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
1416 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
1417 [NFSD_Export_features] = {"export_features",
1418 &export_features_operations, S_IRUGO},
1419 [NFSD_FO_UnlockIP] = {"unlock_ip",
1420 &transaction_ops, S_IWUSR|S_IRUSR},
1421 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1422 &transaction_ops, S_IWUSR|S_IRUSR},
1423 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1424 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
1425 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
1426 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
1427 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
1428 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
1429 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
1430 #ifdef CONFIG_SUNRPC_GSS
1431 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
1432 #endif /* CONFIG_SUNRPC_GSS */
1433 #ifdef CONFIG_NFSD_V4
1434 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
1435 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
1436 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
1440 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1443 static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1444 int flags, const char *dev_name, void *data)
1446 return mount_single(fs_type, flags, data, nfsd_fill_super);
1449 static struct file_system_type nfsd_fs_type = {
1450 .owner = THIS_MODULE,
1452 .mount = nfsd_mount,
1453 .kill_sb = kill_litter_super,
1456 #ifdef CONFIG_PROC_FS
1457 static int create_proc_exports_entry(void)
1459 struct proc_dir_entry *entry;
1461 entry = proc_mkdir("fs/nfs", NULL);
1464 entry = proc_create("exports", 0, entry, &exports_operations);
1469 #else /* CONFIG_PROC_FS */
1470 static int create_proc_exports_entry(void)
1476 static int __init init_nfsd(void)
1479 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1481 retval = nfs4_state_init(); /* nfs4 locking state */
1484 nfsd_stat_init(); /* Statistics */
1485 retval = nfsd_reply_cache_init();
1488 retval = nfsd_export_init();
1490 goto out_free_cache;
1491 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1492 retval = nfsd_idmap_init();
1494 goto out_free_lockd;
1495 retval = create_proc_exports_entry();
1497 goto out_free_idmap;
1498 retval = register_filesystem(&nfsd_fs_type);
1503 remove_proc_entry("fs/nfs/exports", NULL);
1504 remove_proc_entry("fs/nfs", NULL);
1506 nfsd_idmap_shutdown();
1508 nfsd_lockd_shutdown();
1509 nfsd_export_shutdown();
1511 nfsd_reply_cache_shutdown();
1513 nfsd_stat_shutdown();
1518 static void __exit exit_nfsd(void)
1520 nfsd_export_shutdown();
1521 nfsd_reply_cache_shutdown();
1522 remove_proc_entry("fs/nfs/exports", NULL);
1523 remove_proc_entry("fs/nfs", NULL);
1524 nfsd_stat_shutdown();
1525 nfsd_lockd_shutdown();
1526 nfsd_idmap_shutdown();
1528 unregister_filesystem(&nfsd_fs_type);
1531 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1532 MODULE_LICENSE("GPL");
1533 module_init(init_nfsd)
1534 module_exit(exit_nfsd)