2 * Syscall interface to knfsd.
4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
7 #include <linux/slab.h>
8 #include <linux/namei.h>
9 #include <linux/ctype.h>
11 #include <linux/sunrpc/svcsock.h>
12 #include <linux/lockd/lockd.h>
13 #include <linux/sunrpc/clnt.h>
14 #include <linux/sunrpc/gss_api.h>
15 #include <linux/sunrpc/gss_krb5_enctypes.h>
22 * We have a single directory with several nodes in it.
37 NFSD_SupportedEnctypes,
39 * The below MUST come last. Otherwise we leave a hole in nfsd_files[]
40 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops
50 * write() for these nodes.
52 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
53 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
54 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
55 static ssize_t write_threads(struct file *file, char *buf, size_t size);
56 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size);
57 static ssize_t write_versions(struct file *file, char *buf, size_t size);
58 static ssize_t write_ports(struct file *file, char *buf, size_t size);
59 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size);
61 static ssize_t write_leasetime(struct file *file, char *buf, size_t size);
62 static ssize_t write_gracetime(struct file *file, char *buf, size_t size);
63 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size);
66 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
67 [NFSD_Fh] = write_filehandle,
68 [NFSD_FO_UnlockIP] = write_unlock_ip,
69 [NFSD_FO_UnlockFS] = write_unlock_fs,
70 [NFSD_Threads] = write_threads,
71 [NFSD_Pool_Threads] = write_pool_threads,
72 [NFSD_Versions] = write_versions,
73 [NFSD_Ports] = write_ports,
74 [NFSD_MaxBlkSize] = write_maxblksize,
76 [NFSD_Leasetime] = write_leasetime,
77 [NFSD_Gracetime] = write_gracetime,
78 [NFSD_RecoveryDir] = write_recoverydir,
82 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos)
84 ino_t ino = file->f_path.dentry->d_inode->i_ino;
88 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino])
91 data = simple_transaction_get(file, buf, size);
95 rv = write_op[ino](file, data, size);
97 simple_transaction_set(file, rv);
103 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
105 if (! file->private_data) {
106 /* An attempt to read a transaction file without writing
107 * causes a 0-byte write so that the file can return
110 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos);
114 return simple_transaction_read(file, buf, size, pos);
117 static const struct file_operations transaction_ops = {
118 .write = nfsctl_transaction_write,
119 .read = nfsctl_transaction_read,
120 .release = simple_transaction_release,
121 .llseek = default_llseek,
124 static int exports_open(struct inode *inode, struct file *file)
126 return seq_open(file, &nfs_exports_op);
129 static const struct file_operations exports_operations = {
130 .open = exports_open,
133 .release = seq_release,
134 .owner = THIS_MODULE,
137 static int export_features_show(struct seq_file *m, void *v)
139 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS);
143 static int export_features_open(struct inode *inode, struct file *file)
145 return single_open(file, export_features_show, NULL);
148 static struct file_operations export_features_operations = {
149 .open = export_features_open,
152 .release = single_release,
155 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
156 static int supported_enctypes_show(struct seq_file *m, void *v)
158 seq_printf(m, KRB5_SUPPORTED_ENCTYPES);
162 static int supported_enctypes_open(struct inode *inode, struct file *file)
164 return single_open(file, supported_enctypes_show, NULL);
167 static struct file_operations supported_enctypes_ops = {
168 .open = supported_enctypes_open,
171 .release = single_release,
173 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
175 extern int nfsd_pool_stats_open(struct inode *inode, struct file *file);
176 extern int nfsd_pool_stats_release(struct inode *inode, struct file *file);
178 static const struct file_operations pool_stats_operations = {
179 .open = nfsd_pool_stats_open,
182 .release = nfsd_pool_stats_release,
183 .owner = THIS_MODULE,
186 /*----------------------------------------------------------------------------*/
188 * payload - write methods
193 * write_unlock_ip - Release all locks used by a client
198 * buf: '\n'-terminated C string containing a
199 * presentation format IP address
200 * size: length of C string in @buf
202 * On success: returns zero if all specified locks were released;
203 * returns one if one or more locks were not released
204 * On error: return code is negative errno value
206 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size)
208 struct sockaddr_storage address;
209 struct sockaddr *sap = (struct sockaddr *)&address;
210 size_t salen = sizeof(address);
217 if (buf[size-1] != '\n')
221 if (qword_get(&buf, fo_path, size) < 0)
224 if (rpc_pton(fo_path, size, sap, salen) == 0)
227 return nlmsvc_unlock_all_by_ip(sap);
231 * write_unlock_fs - Release all locks on a local file system
236 * buf: '\n'-terminated C string containing the
237 * absolute pathname of a local file system
238 * size: length of C string in @buf
240 * On success: returns zero if all specified locks were released;
241 * returns one if one or more locks were not released
242 * On error: return code is negative errno value
244 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size)
254 if (buf[size-1] != '\n')
258 if (qword_get(&buf, fo_path, size) < 0)
261 error = kern_path(fo_path, 0, &path);
266 * XXX: Needs better sanity checking. Otherwise we could end up
267 * releasing locks on the wrong file system.
270 * 1. Does the path refer to a directory?
271 * 2. Is that directory a mount point, or
272 * 3. Is that directory the root of an exported file system?
274 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb);
281 * write_filehandle - Get a variable-length NFS file handle by path
283 * On input, the buffer contains a '\n'-terminated C string comprised of
284 * three alphanumeric words separated by whitespace. The string may
285 * contain escape sequences.
289 * domain: client domain name
290 * path: export pathname
291 * maxsize: numeric maximum size of
293 * size: length of C string in @buf
295 * On success: passed-in buffer filled with '\n'-terminated C
296 * string containing a ASCII hex text version
297 * of the NFS file handle;
298 * return code is the size in bytes of the string
299 * On error: return code is negative errno value
301 static ssize_t write_filehandle(struct file *file, char *buf, size_t size)
304 int uninitialized_var(maxsize);
307 struct auth_domain *dom;
313 if (buf[size-1] != '\n')
318 len = qword_get(&mesg, dname, size);
323 len = qword_get(&mesg, path, size);
327 len = get_int(&mesg, &maxsize);
331 if (maxsize < NFS_FHSIZE)
333 if (maxsize > NFS3_FHSIZE)
334 maxsize = NFS3_FHSIZE;
336 if (qword_get(&mesg, mesg, size)>0)
339 /* we have all the words, they are in buf.. */
340 dom = unix_domain_find(dname);
344 len = exp_rootfh(dom, path, &fh, maxsize);
345 auth_domain_put(dom);
350 len = SIMPLE_TRANSACTION_LIMIT;
351 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size);
357 * write_threads - Start NFSD, or report the current number of running threads
363 * On success: passed-in buffer filled with '\n'-terminated C
364 * string numeric value representing the number of
365 * running NFSD threads;
366 * return code is the size in bytes of the string
367 * On error: return code is zero
372 * buf: C string containing an unsigned
373 * integer value representing the
374 * number of NFSD threads to start
375 * size: non-zero length of C string in @buf
377 * On success: NFS service is started;
378 * passed-in buffer filled with '\n'-terminated C
379 * string numeric value representing the number of
380 * running NFSD threads;
381 * return code is the size in bytes of the string
382 * On error: return code is zero or a negative errno value
384 static ssize_t write_threads(struct file *file, char *buf, size_t size)
390 rv = get_int(&mesg, &newthreads);
395 rv = nfsd_svc(NFS_PORT, newthreads);
399 rv = nfsd_nrthreads();
401 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv);
405 * write_pool_threads - Set or report the current number of threads per pool
414 * buf: C string containing whitespace-
415 * separated unsigned integer values
416 * representing the number of NFSD
417 * threads to start in each pool
418 * size: non-zero length of C string in @buf
420 * On success: passed-in buffer filled with '\n'-terminated C
421 * string containing integer values representing the
422 * number of NFSD threads in each pool;
423 * return code is the size in bytes of the string
424 * On error: return code is zero or a negative errno value
426 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
428 /* if size > 0, look for an array of number of threads per node
429 * and apply them then write out number of threads per node as reply
438 mutex_lock(&nfsd_mutex);
439 npools = nfsd_nrpools();
442 * NFS is shut down. The admin can start it by
443 * writing to the threads file but NOT the pool_threads
444 * file, sorry. Report zero threads.
446 mutex_unlock(&nfsd_mutex);
451 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL);
453 if (nthreads == NULL)
457 for (i = 0; i < npools; i++) {
458 rv = get_int(&mesg, &nthreads[i]);
460 break; /* fewer numbers than pools */
462 goto out_free; /* syntax error */
467 rv = nfsd_set_nrthreads(i, nthreads);
472 rv = nfsd_get_nrthreads(npools, nthreads);
477 size = SIMPLE_TRANSACTION_LIMIT;
478 for (i = 0; i < npools && size > 0; i++) {
479 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' '));
487 mutex_unlock(&nfsd_mutex);
491 static ssize_t __write_versions(struct file *file, char *buf, size_t size)
494 char *vers, *minorp, sign;
495 int len, num, remaining;
502 /* Cannot change versions without updating
503 * nfsd_serv->sv_xdrsize, and reallocing
504 * rq_argp and rq_resp
507 if (buf[size-1] != '\n')
512 len = qword_get(&mesg, vers, size);
513 if (len <= 0) return -EINVAL;
516 if (sign == '+' || sign == '-')
517 num = simple_strtol((vers+1), &minorp, 0);
519 num = simple_strtol(vers, &minorp, 0);
520 if (*minorp == '.') {
523 minor = simple_strtoul(minorp+1, NULL, 0);
526 if (nfsd_minorversion(minor, sign == '-' ?
527 NFSD_CLEAR : NFSD_SET) < 0)
535 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET);
542 } while ((len = qword_get(&mesg, vers, size)) > 0);
543 /* If all get turned off, turn them back on, as
544 * having no versions is BAD
546 nfsd_reset_versions();
549 /* Now write current state into reply buffer */
552 remaining = SIMPLE_TRANSACTION_LIMIT;
553 for (num=2 ; num <= 4 ; num++)
554 if (nfsd_vers(num, NFSD_AVAIL)) {
555 len = snprintf(buf, remaining, "%s%c%d", sep,
556 nfsd_vers(num, NFSD_TEST)?'+':'-',
566 if (nfsd_vers(4, NFSD_AVAIL))
567 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
569 len = snprintf(buf, remaining, " %c4.%u",
570 (nfsd_vers(4, NFSD_TEST) &&
571 nfsd_minorversion(minor, NFSD_TEST)) ?
582 len = snprintf(buf, remaining, "\n");
589 * write_versions - Set or report the available NFS protocol versions
595 * On success: passed-in buffer filled with '\n'-terminated C
596 * string containing positive or negative integer
597 * values representing the current status of each
599 * return code is the size in bytes of the string
600 * On error: return code is zero or a negative errno value
605 * buf: C string containing whitespace-
606 * separated positive or negative
607 * integer values representing NFS
608 * protocol versions to enable ("+n")
610 * size: non-zero length of C string in @buf
612 * On success: status of zero or more protocol versions has
613 * been updated; passed-in buffer filled with
614 * '\n'-terminated C string containing positive
615 * or negative integer values representing the
616 * current status of each protocol version;
617 * return code is the size in bytes of the string
618 * On error: return code is zero or a negative errno value
620 static ssize_t write_versions(struct file *file, char *buf, size_t size)
624 mutex_lock(&nfsd_mutex);
625 rv = __write_versions(file, buf, size);
626 mutex_unlock(&nfsd_mutex);
631 * Zero-length write. Return a list of NFSD's current listener
634 static ssize_t __write_ports_names(char *buf)
636 if (nfsd_serv == NULL)
638 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT);
642 * A single 'fd' number was written, in which case it must be for
643 * a socket of a supported family/protocol, and we use it as an
646 static ssize_t __write_ports_addfd(char *buf)
651 err = get_int(&mesg, &fd);
652 if (err != 0 || fd < 0)
655 err = nfsd_create_serv();
659 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
661 svc_destroy(nfsd_serv);
665 /* Decrease the count, but don't shut down the service */
666 nfsd_serv->sv_nrthreads--;
671 * A '-' followed by the 'name' of a socket means we close the socket.
673 static ssize_t __write_ports_delfd(char *buf)
678 toclose = kstrdup(buf + 1, GFP_KERNEL);
682 if (nfsd_serv != NULL)
683 len = svc_sock_names(nfsd_serv, buf,
684 SIMPLE_TRANSACTION_LIMIT, toclose);
690 * A transport listener is added by writing it's transport name and
693 static ssize_t __write_ports_addxprt(char *buf)
696 struct svc_xprt *xprt;
699 if (sscanf(buf, "%15s %4u", transport, &port) != 2)
702 if (port < 1 || port > USHRT_MAX)
705 err = nfsd_create_serv();
709 err = svc_create_xprt(nfsd_serv, transport, &init_net,
710 PF_INET, port, SVC_SOCK_ANONYMOUS);
714 err = svc_create_xprt(nfsd_serv, transport, &init_net,
715 PF_INET6, port, SVC_SOCK_ANONYMOUS);
716 if (err < 0 && err != -EAFNOSUPPORT)
719 /* Decrease the count, but don't shut down the service */
720 nfsd_serv->sv_nrthreads--;
723 xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
725 svc_close_xprt(xprt);
729 svc_destroy(nfsd_serv);
734 * A transport listener is removed by writing a "-", it's transport
735 * name, and it's port number.
737 static ssize_t __write_ports_delxprt(char *buf)
739 struct svc_xprt *xprt;
743 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2)
746 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL)
749 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port);
753 svc_close_xprt(xprt);
758 static ssize_t __write_ports(struct file *file, char *buf, size_t size)
761 return __write_ports_names(buf);
764 return __write_ports_addfd(buf);
766 if (buf[0] == '-' && isdigit(buf[1]))
767 return __write_ports_delfd(buf);
770 return __write_ports_addxprt(buf);
772 if (buf[0] == '-' && isalpha(buf[1]))
773 return __write_ports_delxprt(buf);
779 * write_ports - Pass a socket file descriptor or transport name to listen on
785 * On success: passed-in buffer filled with a '\n'-terminated C
786 * string containing a whitespace-separated list of
787 * named NFSD listeners;
788 * return code is the size in bytes of the string
789 * On error: return code is zero or a negative errno value
794 * buf: C string containing an unsigned
795 * integer value representing a bound
796 * but unconnected socket that is to be
797 * used as an NFSD listener; listen(3)
798 * must be called for a SOCK_STREAM
799 * socket, otherwise it is ignored
800 * size: non-zero length of C string in @buf
802 * On success: NFS service is started;
803 * passed-in buffer filled with a '\n'-terminated C
804 * string containing a unique alphanumeric name of
806 * return code is the size in bytes of the string
807 * On error: return code is a negative errno value
812 * buf: C string containing a "-" followed
813 * by an integer value representing a
814 * previously passed in socket file
816 * size: non-zero length of C string in @buf
818 * On success: NFS service no longer listens on that socket;
819 * passed-in buffer filled with a '\n'-terminated C
820 * string containing a unique name of the listener;
821 * return code is the size in bytes of the string
822 * On error: return code is a negative errno value
827 * buf: C string containing a transport
828 * name and an unsigned integer value
829 * representing the port to listen on,
830 * separated by whitespace
831 * size: non-zero length of C string in @buf
833 * On success: returns zero; NFS service is started
834 * On error: return code is a negative errno value
839 * buf: C string containing a "-" followed
840 * by a transport name and an unsigned
841 * integer value representing the port
842 * to listen on, separated by whitespace
843 * size: non-zero length of C string in @buf
845 * On success: returns zero; NFS service no longer listens
847 * On error: return code is a negative errno value
849 static ssize_t write_ports(struct file *file, char *buf, size_t size)
853 mutex_lock(&nfsd_mutex);
854 rv = __write_ports(file, buf, size);
855 mutex_unlock(&nfsd_mutex);
860 int nfsd_max_blksize;
863 * write_maxblksize - Set or report the current NFS blksize
872 * buf: C string containing an unsigned
873 * integer value representing the new
875 * size: non-zero length of C string in @buf
877 * On success: passed-in buffer filled with '\n'-terminated C string
878 * containing numeric value of the current NFS blksize
880 * return code is the size in bytes of the string
881 * On error: return code is zero or a negative errno value
883 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size)
888 int rv = get_int(&mesg, &bsize);
891 /* force bsize into allowed range and
892 * required alignment.
896 if (bsize > NFSSVC_MAXBLKSIZE)
897 bsize = NFSSVC_MAXBLKSIZE;
899 mutex_lock(&nfsd_mutex);
901 mutex_unlock(&nfsd_mutex);
904 nfsd_max_blksize = bsize;
905 mutex_unlock(&nfsd_mutex);
908 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n",
912 #ifdef CONFIG_NFSD_V4
913 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
921 rv = get_int(&mesg, &i);
925 * Some sanity checking. We don't have a reason for
926 * these particular numbers, but problems with the
928 * - Too short: the briefest network outage may
929 * cause clients to lose all their locks. Also,
930 * the frequent polling may be wasteful.
931 * - Too long: do you really want reboot recovery
932 * to take more than an hour? Or to make other
933 * clients wait an hour before being able to
934 * revoke a dead client's locks?
936 if (i < 10 || i > 3600)
941 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time);
944 static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time)
948 mutex_lock(&nfsd_mutex);
949 rv = __nfsd4_write_time(file, buf, size, time);
950 mutex_unlock(&nfsd_mutex);
955 * write_leasetime - Set or report the current NFSv4 lease time
964 * buf: C string containing an unsigned
965 * integer value representing the new
966 * NFSv4 lease expiry time
967 * size: non-zero length of C string in @buf
969 * On success: passed-in buffer filled with '\n'-terminated C
970 * string containing unsigned integer value of the
971 * current lease expiry time;
972 * return code is the size in bytes of the string
973 * On error: return code is zero or a negative errno value
975 static ssize_t write_leasetime(struct file *file, char *buf, size_t size)
977 return nfsd4_write_time(file, buf, size, &nfsd4_lease);
981 * write_gracetime - Set or report current NFSv4 grace period time
983 * As above, but sets the time of the NFSv4 grace period.
985 * Note this should never be set to less than the *previous*
986 * lease-period time, but we don't try to enforce this. (In the common
987 * case (a new boot), we don't know what the previous lease time was
990 static ssize_t write_gracetime(struct file *file, char *buf, size_t size)
992 return nfsd4_write_time(file, buf, size, &nfsd4_grace);
995 extern char *nfs4_recoverydir(void);
997 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size)
1006 if (size > PATH_MAX || buf[size-1] != '\n')
1011 len = qword_get(&mesg, recdir, size);
1015 status = nfs4_reset_recoverydir(recdir);
1020 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n",
1021 nfs4_recoverydir());
1025 * write_recoverydir - Set or report the pathname of the recovery directory
1034 * buf: C string containing the pathname
1035 * of the directory on a local file
1036 * system containing permanent NFSv4
1038 * size: non-zero length of C string in @buf
1040 * On success: passed-in buffer filled with '\n'-terminated C string
1041 * containing the current recovery pathname setting;
1042 * return code is the size in bytes of the string
1043 * On error: return code is zero or a negative errno value
1045 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size)
1049 mutex_lock(&nfsd_mutex);
1050 rv = __write_recoverydir(file, buf, size);
1051 mutex_unlock(&nfsd_mutex);
1057 /*----------------------------------------------------------------------------*/
1059 * populating the filesystem.
1062 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
1064 static struct tree_descr nfsd_files[] = {
1065 [NFSD_List] = {"exports", &exports_operations, S_IRUGO},
1066 [NFSD_Export_features] = {"export_features",
1067 &export_features_operations, S_IRUGO},
1068 [NFSD_FO_UnlockIP] = {"unlock_ip",
1069 &transaction_ops, S_IWUSR|S_IRUSR},
1070 [NFSD_FO_UnlockFS] = {"unlock_filesystem",
1071 &transaction_ops, S_IWUSR|S_IRUSR},
1072 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR},
1073 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR},
1074 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR},
1075 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO},
1076 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR},
1077 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO},
1078 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO},
1079 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE)
1080 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", &supported_enctypes_ops, S_IRUGO},
1081 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */
1082 #ifdef CONFIG_NFSD_V4
1083 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR},
1084 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR},
1085 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR},
1089 return simple_fill_super(sb, 0x6e667364, nfsd_files);
1092 static struct dentry *nfsd_mount(struct file_system_type *fs_type,
1093 int flags, const char *dev_name, void *data)
1095 return mount_single(fs_type, flags, data, nfsd_fill_super);
1098 static struct file_system_type nfsd_fs_type = {
1099 .owner = THIS_MODULE,
1101 .mount = nfsd_mount,
1102 .kill_sb = kill_litter_super,
1105 #ifdef CONFIG_PROC_FS
1106 static int create_proc_exports_entry(void)
1108 struct proc_dir_entry *entry;
1110 entry = proc_mkdir("fs/nfs", NULL);
1113 entry = proc_create("exports", 0, entry, &exports_operations);
1118 #else /* CONFIG_PROC_FS */
1119 static int create_proc_exports_entry(void)
1125 static int __init init_nfsd(void)
1128 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
1130 retval = nfs4_state_init(); /* nfs4 locking state */
1133 nfsd_stat_init(); /* Statistics */
1134 retval = nfsd_reply_cache_init();
1137 retval = nfsd_export_init();
1139 goto out_free_cache;
1140 nfsd_lockd_init(); /* lockd->nfsd callbacks */
1141 retval = nfsd_idmap_init();
1143 goto out_free_lockd;
1144 retval = create_proc_exports_entry();
1146 goto out_free_idmap;
1147 retval = register_filesystem(&nfsd_fs_type);
1152 remove_proc_entry("fs/nfs/exports", NULL);
1153 remove_proc_entry("fs/nfs", NULL);
1155 nfsd_idmap_shutdown();
1157 nfsd_lockd_shutdown();
1158 nfsd_export_shutdown();
1160 nfsd_reply_cache_shutdown();
1162 nfsd_stat_shutdown();
1167 static void __exit exit_nfsd(void)
1169 nfsd_export_shutdown();
1170 nfsd_reply_cache_shutdown();
1171 remove_proc_entry("fs/nfs/exports", NULL);
1172 remove_proc_entry("fs/nfs", NULL);
1173 nfsd_stat_shutdown();
1174 nfsd_lockd_shutdown();
1175 nfsd_idmap_shutdown();
1177 unregister_filesystem(&nfsd_fs_type);
1180 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1181 MODULE_LICENSE("GPL");
1182 module_init(init_nfsd)
1183 module_exit(exit_nfsd)