1/*-
2 * Copyright (c) 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD$");
36
37/*
38 * Functions that need to be different for different versions of BSD
39 * kernel should be kept here, along with any global storage specific
40 * to this BSD variant.
41 */
42#include <fs/nfs/nfsport.h>
43#include <sys/sysctl.h>
44#include <vm/vm.h>
45#include <vm/vm_object.h>
46#include <vm/vm_page.h>
47#include <vm/vm_param.h>
48#include <vm/vm_map.h>
49#include <vm/vm_kern.h>
50#include <vm/vm_extern.h>
51#include <vm/uma.h>
52
53extern int nfscl_ticks;
54extern int nfsrv_nfsuserd;
55extern struct nfssockreq nfsrv_nfsuserdsock;
56extern void (*nfsd_call_recall)(struct vnode *, int, struct ucred *,
57    struct thread *);
58extern int nfsrv_useacl;
59struct mount nfsv4root_mnt;
60int newnfs_numnfsd = 0;
61struct nfsstats newnfsstats;
62int nfs_numnfscbd = 0;
63int nfscl_debuglevel = 0;
64char nfsv4_callbackaddr[INET6_ADDRSTRLEN];
65struct callout newnfsd_callout;
66void (*nfsd_call_servertimer)(void) = NULL;
67void (*ncl_call_invalcaches)(struct vnode *) = NULL;
68
69static int nfs_realign_test;
70static int nfs_realign_count;
71
72SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "New NFS filesystem");
73SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test,
74    0, "Number of realign tests done");
75SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count,
76    0, "Number of mbuf realignments done");
77SYSCTL_STRING(_vfs_nfs, OID_AUTO, callback_addr, CTLFLAG_RW,
78    nfsv4_callbackaddr, sizeof(nfsv4_callbackaddr),
79    "NFSv4 callback addr for server to use");
80SYSCTL_INT(_vfs_nfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nfscl_debuglevel,
81    0, "Debug level for new nfs client");
82
83/*
84 * Defines for malloc
85 * (Here for FreeBSD, since they allocate storage.)
86 */
87MALLOC_DEFINE(M_NEWNFSRVCACHE, "NFSD srvcache", "NFSD Server Request Cache");
88MALLOC_DEFINE(M_NEWNFSDCLIENT, "NFSD V4client", "NFSD V4 Client Id");
89MALLOC_DEFINE(M_NEWNFSDSTATE, "NFSD V4state",
90    "NFSD V4 State (Openowner, Open, Lockowner, Delegation");
91MALLOC_DEFINE(M_NEWNFSDLOCK, "NFSD V4lock", "NFSD V4 byte range lock");
92MALLOC_DEFINE(M_NEWNFSDLOCKFILE, "NFSD lckfile", "NFSD Open/Lock file");
93MALLOC_DEFINE(M_NEWNFSSTRING, "NFSD string", "NFSD V4 long string");
94MALLOC_DEFINE(M_NEWNFSUSERGROUP, "NFSD usrgroup", "NFSD V4 User/group map");
95MALLOC_DEFINE(M_NEWNFSDREQ, "NFS req", "NFS request header");
96MALLOC_DEFINE(M_NEWNFSFH, "NFS fh", "NFS file handle");
97MALLOC_DEFINE(M_NEWNFSCLOWNER, "NFSCL owner", "NFSCL Open Owner");
98MALLOC_DEFINE(M_NEWNFSCLOPEN, "NFSCL open", "NFSCL Open");
99MALLOC_DEFINE(M_NEWNFSCLDELEG, "NFSCL deleg", "NFSCL Delegation");
100MALLOC_DEFINE(M_NEWNFSCLCLIENT, "NFSCL client", "NFSCL Client");
101MALLOC_DEFINE(M_NEWNFSCLLOCKOWNER, "NFSCL lckown", "NFSCL Lock Owner");
102MALLOC_DEFINE(M_NEWNFSCLLOCK, "NFSCL lck", "NFSCL Lock");
103MALLOC_DEFINE(M_NEWNFSV4NODE, "NEWNFSnode", "New nfs vnode");
104MALLOC_DEFINE(M_NEWNFSDIRECTIO, "NEWdirectio", "New nfs Direct IO buffer");
105MALLOC_DEFINE(M_NEWNFSDIROFF, "NFSCL diroffdiroff",
106    "New NFS directory offset data");
107MALLOC_DEFINE(M_NEWNFSDROLLBACK, "NFSD rollback",
108    "New NFS local lock rollback");
109MALLOC_DEFINE(M_NEWNFSLAYOUT, "NFSCL layout", "NFSv4.1 Layout");
110MALLOC_DEFINE(M_NEWNFSFLAYOUT, "NFSCL flayout", "NFSv4.1 File Layout");
111MALLOC_DEFINE(M_NEWNFSDEVINFO, "NFSCL devinfo", "NFSv4.1 Device Info");
112MALLOC_DEFINE(M_NEWNFSSOCKREQ, "NFSCL sockreq", "NFS Sock Req");
113MALLOC_DEFINE(M_NEWNFSCLDS, "NFSCL session", "NFSv4.1 Session");
114MALLOC_DEFINE(M_NEWNFSLAYRECALL, "NFSCL layrecall", "NFSv4.1 Layout Recall");
115
116/*
117 * Definition of mutex locks.
118 * newnfsd_mtx is used in nfsrvd_nfsd() to protect the nfs socket list
119 * and assorted other nfsd structures.
120 */
121struct mtx newnfsd_mtx;
122struct mtx nfs_sockl_mutex;
123struct mtx nfs_state_mutex;
124struct mtx nfs_nameid_mutex;
125struct mtx nfs_req_mutex;
126struct mtx nfs_slock_mutex;
127
128/* local functions */
129static int nfssvc_call(struct thread *, struct nfssvc_args *, struct ucred *);
130
131#ifdef __NO_STRICT_ALIGNMENT
132/*
133 * These architectures don't need re-alignment, so just return.
134 */
135int
136newnfs_realign(struct mbuf **pm, int how)
137{
138
139	return (0);
140}
141#else	/* !__NO_STRICT_ALIGNMENT */
142/*
143 *	newnfs_realign:
144 *
145 *	Check for badly aligned mbuf data and realign by copying the unaligned
146 *	portion of the data into a new mbuf chain and freeing the portions
147 *	of the old chain that were replaced.
148 *
149 *	We cannot simply realign the data within the existing mbuf chain
150 *	because the underlying buffers may contain other rpc commands and
151 *	we cannot afford to overwrite them.
152 *
153 *	We would prefer to avoid this situation entirely.  The situation does
154 *	not occur with NFS/UDP and is supposed to only occassionally occur
155 *	with TCP.  Use vfs.nfs.realign_count and realign_test to check this.
156 *
157 */
158int
159newnfs_realign(struct mbuf **pm, int how)
160{
161	struct mbuf *m, *n;
162	int off, space;
163
164	++nfs_realign_test;
165	while ((m = *pm) != NULL) {
166		if ((m->m_len & 0x3) || (mtod(m, intptr_t) & 0x3)) {
167			/*
168			 * NB: we can't depend on m_pkthdr.len to help us
169			 * decide what to do here.  May not be worth doing
170			 * the m_length calculation as m_copyback will
171			 * expand the mbuf chain below as needed.
172			 */
173			space = m_length(m, NULL);
174			if (space >= MINCLSIZE) {
175				/* NB: m_copyback handles space > MCLBYTES */
176				n = m_getcl(how, MT_DATA, 0);
177			} else
178				n = m_get(how, MT_DATA);
179			if (n == NULL)
180				return (ENOMEM);
181			/*
182			 * Align the remainder of the mbuf chain.
183			 */
184			n->m_len = 0;
185			off = 0;
186			while (m != NULL) {
187				m_copyback(n, off, m->m_len, mtod(m, caddr_t));
188				off += m->m_len;
189				m = m->m_next;
190			}
191			m_freem(*pm);
192			*pm = n;
193			++nfs_realign_count;
194			break;
195		}
196		pm = &m->m_next;
197	}
198
199	return (0);
200}
201#endif	/* __NO_STRICT_ALIGNMENT */
202
203#ifdef notdef
204static void
205nfsrv_object_create(struct vnode *vp, struct thread *td)
206{
207
208	if (vp == NULL || vp->v_type != VREG)
209		return;
210	(void) vfs_object_create(vp, td, td->td_ucred);
211}
212#endif
213
214/*
215 * Look up a file name. Basically just initialize stuff and call namei().
216 */
217int
218nfsrv_lookupfilename(struct nameidata *ndp, char *fname, NFSPROC_T *p)
219{
220	int error;
221
222	NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fname,
223	    p);
224	error = namei(ndp);
225	if (!error) {
226		NDFREE(ndp, NDF_ONLY_PNBUF);
227	}
228	return (error);
229}
230
231/*
232 * Copy NFS uid, gids to the cred structure.
233 */
234void
235newnfs_copycred(struct nfscred *nfscr, struct ucred *cr)
236{
237
238	KASSERT(nfscr->nfsc_ngroups >= 0,
239	    ("newnfs_copycred: negative nfsc_ngroups"));
240	cr->cr_uid = nfscr->nfsc_uid;
241	crsetgroups(cr, nfscr->nfsc_ngroups, nfscr->nfsc_groups);
242}
243
244/*
245 * Map args from nfsmsleep() to msleep().
246 */
247int
248nfsmsleep(void *chan, void *mutex, int prio, const char *wmesg,
249    struct timespec *ts)
250{
251	u_int64_t nsecval;
252	int error, timeo;
253
254	if (ts) {
255		timeo = hz * ts->tv_sec;
256		nsecval = (u_int64_t)ts->tv_nsec;
257		nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) /
258		    1000000000;
259		timeo += (int)nsecval;
260	} else {
261		timeo = 0;
262	}
263	error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo);
264	return (error);
265}
266
267/*
268 * Get the file system info for the server. For now, just assume FFS.
269 */
270void
271nfsvno_getfs(struct nfsfsinfo *sip, int isdgram)
272{
273	int pref;
274
275	/*
276	 * XXX
277	 * There should be file system VFS OP(s) to get this information.
278	 * For now, assume ufs.
279	 */
280	if (isdgram)
281		pref = NFS_MAXDGRAMDATA;
282	else
283		pref = NFS_MAXDATA;
284	sip->fs_rtmax = NFS_MAXDATA;
285	sip->fs_rtpref = pref;
286	sip->fs_rtmult = NFS_FABLKSIZE;
287	sip->fs_wtmax = NFS_MAXDATA;
288	sip->fs_wtpref = pref;
289	sip->fs_wtmult = NFS_FABLKSIZE;
290	sip->fs_dtpref = pref;
291	sip->fs_maxfilesize = 0xffffffffffffffffull;
292	sip->fs_timedelta.tv_sec = 0;
293	sip->fs_timedelta.tv_nsec = 1;
294	sip->fs_properties = (NFSV3FSINFO_LINK |
295	    NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
296	    NFSV3FSINFO_CANSETTIME);
297}
298
299/*
300 * Do the pathconf vnode op.
301 */
302int
303nfsvno_pathconf(struct vnode *vp, int flag, register_t *retf,
304    struct ucred *cred, struct thread *p)
305{
306	int error;
307
308	error = VOP_PATHCONF(vp, flag, retf);
309	if (error == EOPNOTSUPP || error == EINVAL) {
310		/*
311		 * Some file systems return EINVAL for name arguments not
312		 * supported and some return EOPNOTSUPP for this case.
313		 * So the NFSv3 Pathconf RPC doesn't fail for these cases,
314		 * just fake them.
315		 */
316		switch (flag) {
317		case _PC_LINK_MAX:
318			*retf = LINK_MAX;
319			break;
320		case _PC_NAME_MAX:
321			*retf = NAME_MAX;
322			break;
323		case _PC_CHOWN_RESTRICTED:
324			*retf = 1;
325			break;
326		case _PC_NO_TRUNC:
327			*retf = 1;
328			break;
329		default:
330			/*
331			 * Only happens if a _PC_xxx is added to the server,
332			 * but this isn't updated.
333			 */
334			*retf = 0;
335			printf("nfsrvd pathconf flag=%d not supp\n", flag);
336		};
337		error = 0;
338	}
339	NFSEXITCODE(error);
340	return (error);
341}
342
343/* Fake nfsrv_atroot. Just return 0 */
344int
345nfsrv_atroot(struct vnode *vp, long *retp)
346{
347
348	return (0);
349}
350
351/*
352 * Set the credentials to refer to root.
353 * If only the various BSDen could agree on whether cr_gid is a separate
354 * field or cr_groups[0]...
355 */
356void
357newnfs_setroot(struct ucred *cred)
358{
359
360	cred->cr_uid = 0;
361	cred->cr_groups[0] = 0;
362	cred->cr_ngroups = 1;
363}
364
365/*
366 * Get the client credential. Used for Renew and recovery.
367 */
368struct ucred *
369newnfs_getcred(void)
370{
371	struct ucred *cred;
372	struct thread *td = curthread;
373
374	cred = crdup(td->td_ucred);
375	newnfs_setroot(cred);
376	return (cred);
377}
378
379/*
380 * Nfs timer routine
381 * Call the nfsd's timer function once/sec.
382 */
383void
384newnfs_timer(void *arg)
385{
386	static time_t lasttime = 0;
387	/*
388	 * Call the server timer, if set up.
389	 * The argument indicates if it is the next second and therefore
390	 * leases should be checked.
391	 */
392	if (lasttime != NFSD_MONOSEC) {
393		lasttime = NFSD_MONOSEC;
394		if (nfsd_call_servertimer != NULL)
395			(*nfsd_call_servertimer)();
396	}
397	callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL);
398}
399
400
401/*
402 * Sleep for a short period of time unless errval == NFSERR_GRACE, where
403 * the sleep should be for 5 seconds.
404 * Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on
405 * an event that never gets a wakeup. Only return EINTR or 0.
406 */
407int
408nfs_catnap(int prio, int errval, const char *wmesg)
409{
410	static int non_event;
411	int ret;
412
413	if (errval == NFSERR_GRACE)
414		ret = tsleep(&non_event, prio, wmesg, 5 * hz);
415	else
416		ret = tsleep(&non_event, prio, wmesg, 1);
417	if (ret != EINTR)
418		ret = 0;
419	return (ret);
420}
421
422/*
423 * Get referral. For now, just fail.
424 */
425struct nfsreferral *
426nfsv4root_getreferral(struct vnode *vp, struct vnode *dvp, u_int32_t fileno)
427{
428
429	return (NULL);
430}
431
432static int
433nfssvc_nfscommon(struct thread *td, struct nfssvc_args *uap)
434{
435	int error;
436
437	error = nfssvc_call(td, uap, td->td_ucred);
438	NFSEXITCODE(error);
439	return (error);
440}
441
442static int
443nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
444{
445	int error = EINVAL;
446	struct nfsd_idargs nid;
447
448	if (uap->flag & NFSSVC_IDNAME) {
449		error = copyin(uap->argp, (caddr_t)&nid, sizeof (nid));
450		if (error)
451			goto out;
452		error = nfssvc_idname(&nid);
453		goto out;
454	} else if (uap->flag & NFSSVC_GETSTATS) {
455		error = copyout(&newnfsstats,
456		    CAST_USER_ADDR_T(uap->argp), sizeof (newnfsstats));
457		if (error == 0) {
458			if ((uap->flag & NFSSVC_ZEROCLTSTATS) != 0) {
459				newnfsstats.attrcache_hits = 0;
460				newnfsstats.attrcache_misses = 0;
461				newnfsstats.lookupcache_hits = 0;
462				newnfsstats.lookupcache_misses = 0;
463				newnfsstats.direofcache_hits = 0;
464				newnfsstats.direofcache_misses = 0;
465				newnfsstats.accesscache_hits = 0;
466				newnfsstats.accesscache_misses = 0;
467				newnfsstats.biocache_reads = 0;
468				newnfsstats.read_bios = 0;
469				newnfsstats.read_physios = 0;
470				newnfsstats.biocache_writes = 0;
471				newnfsstats.write_bios = 0;
472				newnfsstats.write_physios = 0;
473				newnfsstats.biocache_readlinks = 0;
474				newnfsstats.readlink_bios = 0;
475				newnfsstats.biocache_readdirs = 0;
476				newnfsstats.readdir_bios = 0;
477				newnfsstats.rpcretries = 0;
478				newnfsstats.rpcrequests = 0;
479				newnfsstats.rpctimeouts = 0;
480				newnfsstats.rpcunexpected = 0;
481				newnfsstats.rpcinvalid = 0;
482				bzero(newnfsstats.rpccnt,
483				    sizeof(newnfsstats.rpccnt));
484			}
485			if ((uap->flag & NFSSVC_ZEROSRVSTATS) != 0) {
486				newnfsstats.srvrpc_errs = 0;
487				newnfsstats.srv_errs = 0;
488				newnfsstats.srvcache_inproghits = 0;
489				newnfsstats.srvcache_idemdonehits = 0;
490				newnfsstats.srvcache_nonidemdonehits = 0;
491				newnfsstats.srvcache_misses = 0;
492				newnfsstats.srvcache_tcppeak = 0;
493				newnfsstats.srvclients = 0;
494				newnfsstats.srvopenowners = 0;
495				newnfsstats.srvopens = 0;
496				newnfsstats.srvlockowners = 0;
497				newnfsstats.srvlocks = 0;
498				newnfsstats.srvdelegates = 0;
499				newnfsstats.clopenowners = 0;
500				newnfsstats.clopens = 0;
501				newnfsstats.cllockowners = 0;
502				newnfsstats.cllocks = 0;
503				newnfsstats.cldelegates = 0;
504				newnfsstats.cllocalopenowners = 0;
505				newnfsstats.cllocalopens = 0;
506				newnfsstats.cllocallockowners = 0;
507				newnfsstats.cllocallocks = 0;
508				bzero(newnfsstats.srvrpccnt,
509				    sizeof(newnfsstats.srvrpccnt));
510				bzero(newnfsstats.cbrpccnt,
511				    sizeof(newnfsstats.cbrpccnt));
512			}
513		}
514		goto out;
515	} else if (uap->flag & NFSSVC_NFSUSERDPORT) {
516		u_short sockport;
517
518		error = copyin(uap->argp, (caddr_t)&sockport,
519		    sizeof (u_short));
520		if (!error)
521			error = nfsrv_nfsuserdport(sockport, p);
522	} else if (uap->flag & NFSSVC_NFSUSERDDELPORT) {
523		nfsrv_nfsuserddelport();
524		error = 0;
525	}
526
527out:
528	NFSEXITCODE(error);
529	return (error);
530}
531
532/*
533 * called by all three modevent routines, so that it gets things
534 * initialized soon enough.
535 */
536void
537newnfs_portinit(void)
538{
539	static int inited = 0;
540
541	if (inited)
542		return;
543	inited = 1;
544	/* Initialize SMP locks used by both client and server. */
545	mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF);
546	mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF);
547}
548
549/*
550 * Determine if the file system supports NFSv4 ACLs.
551 * Return 1 if it does, 0 otherwise.
552 */
553int
554nfs_supportsnfsv4acls(struct vnode *vp)
555{
556	int error;
557	register_t retval;
558
559	ASSERT_VOP_LOCKED(vp, "nfs supports nfsv4acls");
560
561	if (nfsrv_useacl == 0)
562		return (0);
563	error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
564	if (error == 0 && retval != 0)
565		return (1);
566	return (0);
567}
568
569extern int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *);
570
571/*
572 * Called once to initialize data structures...
573 */
574static int
575nfscommon_modevent(module_t mod, int type, void *data)
576{
577	int error = 0;
578	static int loaded = 0;
579
580	switch (type) {
581	case MOD_LOAD:
582		if (loaded)
583			goto out;
584		newnfs_portinit();
585		mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF);
586		mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF);
587		mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF);
588		mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF);
589		mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL,
590		    MTX_DEF);
591		callout_init(&newnfsd_callout, CALLOUT_MPSAFE);
592		newnfs_init();
593		nfsd_call_nfscommon = nfssvc_nfscommon;
594		loaded = 1;
595		break;
596
597	case MOD_UNLOAD:
598		if (newnfs_numnfsd != 0 || nfsrv_nfsuserd != 0 ||
599		    nfs_numnfscbd != 0) {
600			error = EBUSY;
601			break;
602		}
603
604		nfsd_call_nfscommon = NULL;
605		callout_drain(&newnfsd_callout);
606		/* and get rid of the mutexes */
607		mtx_destroy(&nfs_nameid_mutex);
608		mtx_destroy(&newnfsd_mtx);
609		mtx_destroy(&nfs_state_mutex);
610		mtx_destroy(&nfs_sockl_mutex);
611		mtx_destroy(&nfs_slock_mutex);
612		mtx_destroy(&nfs_req_mutex);
613		mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx);
614		loaded = 0;
615		break;
616	default:
617		error = EOPNOTSUPP;
618		break;
619	}
620
621out:
622	NFSEXITCODE(error);
623	return error;
624}
625static moduledata_t nfscommon_mod = {
626	"nfscommon",
627	nfscommon_modevent,
628	NULL,
629};
630DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY);
631
632/* So that loader and kldload(2) can find us, wherever we are.. */
633MODULE_VERSION(nfscommon, 1);
634MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1);
635MODULE_DEPEND(nfscommon, krpc, 1, 1, 1);
636
637