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");
115MALLOC_DEFINE(M_NEWNFSDSESSION, "NFSD session", "NFSD Session for a client");
116
117/*
118 * Definition of mutex locks.
119 * newnfsd_mtx is used in nfsrvd_nfsd() to protect the nfs socket list
120 * and assorted other nfsd structures.
121 */
122struct mtx newnfsd_mtx;
123struct mtx nfs_sockl_mutex;
124struct mtx nfs_state_mutex;
125struct mtx nfs_nameid_mutex;
126struct mtx nfs_req_mutex;
127struct mtx nfs_slock_mutex;
128
129/* local functions */
130static int nfssvc_call(struct thread *, struct nfssvc_args *, struct ucred *);
131
132#ifdef __NO_STRICT_ALIGNMENT
133/*
134 * These architectures don't need re-alignment, so just return.
135 */
136int
137newnfs_realign(struct mbuf **pm, int how)
138{
139
140	return (0);
141}
142#else	/* !__NO_STRICT_ALIGNMENT */
143/*
144 *	newnfs_realign:
145 *
146 *	Check for badly aligned mbuf data and realign by copying the unaligned
147 *	portion of the data into a new mbuf chain and freeing the portions
148 *	of the old chain that were replaced.
149 *
150 *	We cannot simply realign the data within the existing mbuf chain
151 *	because the underlying buffers may contain other rpc commands and
152 *	we cannot afford to overwrite them.
153 *
154 *	We would prefer to avoid this situation entirely.  The situation does
155 *	not occur with NFS/UDP and is supposed to only occassionally occur
156 *	with TCP.  Use vfs.nfs.realign_count and realign_test to check this.
157 *
158 */
159int
160newnfs_realign(struct mbuf **pm, int how)
161{
162	struct mbuf *m, *n;
163	int off, space;
164
165	++nfs_realign_test;
166	while ((m = *pm) != NULL) {
167		if ((m->m_len & 0x3) || (mtod(m, intptr_t) & 0x3)) {
168			/*
169			 * NB: we can't depend on m_pkthdr.len to help us
170			 * decide what to do here.  May not be worth doing
171			 * the m_length calculation as m_copyback will
172			 * expand the mbuf chain below as needed.
173			 */
174			space = m_length(m, NULL);
175			if (space >= MINCLSIZE) {
176				/* NB: m_copyback handles space > MCLBYTES */
177				n = m_getcl(how, MT_DATA, 0);
178			} else
179				n = m_get(how, MT_DATA);
180			if (n == NULL)
181				return (ENOMEM);
182			/*
183			 * Align the remainder of the mbuf chain.
184			 */
185			n->m_len = 0;
186			off = 0;
187			while (m != NULL) {
188				m_copyback(n, off, m->m_len, mtod(m, caddr_t));
189				off += m->m_len;
190				m = m->m_next;
191			}
192			m_freem(*pm);
193			*pm = n;
194			++nfs_realign_count;
195			break;
196		}
197		pm = &m->m_next;
198	}
199
200	return (0);
201}
202#endif	/* __NO_STRICT_ALIGNMENT */
203
204#ifdef notdef
205static void
206nfsrv_object_create(struct vnode *vp, struct thread *td)
207{
208
209	if (vp == NULL || vp->v_type != VREG)
210		return;
211	(void) vfs_object_create(vp, td, td->td_ucred);
212}
213#endif
214
215/*
216 * Look up a file name. Basically just initialize stuff and call namei().
217 */
218int
219nfsrv_lookupfilename(struct nameidata *ndp, char *fname, NFSPROC_T *p)
220{
221	int error;
222
223	NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fname,
224	    p);
225	error = namei(ndp);
226	if (!error) {
227		NDFREE(ndp, NDF_ONLY_PNBUF);
228	}
229	return (error);
230}
231
232/*
233 * Copy NFS uid, gids to the cred structure.
234 */
235void
236newnfs_copycred(struct nfscred *nfscr, struct ucred *cr)
237{
238
239	KASSERT(nfscr->nfsc_ngroups >= 0,
240	    ("newnfs_copycred: negative nfsc_ngroups"));
241	cr->cr_uid = nfscr->nfsc_uid;
242	crsetgroups(cr, nfscr->nfsc_ngroups, nfscr->nfsc_groups);
243}
244
245/*
246 * Map args from nfsmsleep() to msleep().
247 */
248int
249nfsmsleep(void *chan, void *mutex, int prio, const char *wmesg,
250    struct timespec *ts)
251{
252	u_int64_t nsecval;
253	int error, timeo;
254
255	if (ts) {
256		timeo = hz * ts->tv_sec;
257		nsecval = (u_int64_t)ts->tv_nsec;
258		nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) /
259		    1000000000;
260		timeo += (int)nsecval;
261	} else {
262		timeo = 0;
263	}
264	error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo);
265	return (error);
266}
267
268/*
269 * Get the file system info for the server. For now, just assume FFS.
270 */
271void
272nfsvno_getfs(struct nfsfsinfo *sip, int isdgram)
273{
274	int pref;
275
276	/*
277	 * XXX
278	 * There should be file system VFS OP(s) to get this information.
279	 * For now, assume ufs.
280	 */
281	if (isdgram)
282		pref = NFS_MAXDGRAMDATA;
283	else
284		pref = NFS_MAXDATA;
285	sip->fs_rtmax = NFS_MAXDATA;
286	sip->fs_rtpref = pref;
287	sip->fs_rtmult = NFS_FABLKSIZE;
288	sip->fs_wtmax = NFS_MAXDATA;
289	sip->fs_wtpref = pref;
290	sip->fs_wtmult = NFS_FABLKSIZE;
291	sip->fs_dtpref = pref;
292	sip->fs_maxfilesize = 0xffffffffffffffffull;
293	sip->fs_timedelta.tv_sec = 0;
294	sip->fs_timedelta.tv_nsec = 1;
295	sip->fs_properties = (NFSV3FSINFO_LINK |
296	    NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
297	    NFSV3FSINFO_CANSETTIME);
298}
299
300/*
301 * Do the pathconf vnode op.
302 */
303int
304nfsvno_pathconf(struct vnode *vp, int flag, register_t *retf,
305    struct ucred *cred, struct thread *p)
306{
307	int error;
308
309	error = VOP_PATHCONF(vp, flag, retf);
310	if (error == EOPNOTSUPP || error == EINVAL) {
311		/*
312		 * Some file systems return EINVAL for name arguments not
313		 * supported and some return EOPNOTSUPP for this case.
314		 * So the NFSv3 Pathconf RPC doesn't fail for these cases,
315		 * just fake them.
316		 */
317		switch (flag) {
318		case _PC_LINK_MAX:
319			*retf = LINK_MAX;
320			break;
321		case _PC_NAME_MAX:
322			*retf = NAME_MAX;
323			break;
324		case _PC_CHOWN_RESTRICTED:
325			*retf = 1;
326			break;
327		case _PC_NO_TRUNC:
328			*retf = 1;
329			break;
330		default:
331			/*
332			 * Only happens if a _PC_xxx is added to the server,
333			 * but this isn't updated.
334			 */
335			*retf = 0;
336			printf("nfsrvd pathconf flag=%d not supp\n", flag);
337		};
338		error = 0;
339	}
340	NFSEXITCODE(error);
341	return (error);
342}
343
344/* Fake nfsrv_atroot. Just return 0 */
345int
346nfsrv_atroot(struct vnode *vp, long *retp)
347{
348
349	return (0);
350}
351
352/*
353 * Set the credentials to refer to root.
354 * If only the various BSDen could agree on whether cr_gid is a separate
355 * field or cr_groups[0]...
356 */
357void
358newnfs_setroot(struct ucred *cred)
359{
360
361	cred->cr_uid = 0;
362	cred->cr_groups[0] = 0;
363	cred->cr_ngroups = 1;
364}
365
366/*
367 * Get the client credential. Used for Renew and recovery.
368 */
369struct ucred *
370newnfs_getcred(void)
371{
372	struct ucred *cred;
373	struct thread *td = curthread;
374
375	cred = crdup(td->td_ucred);
376	newnfs_setroot(cred);
377	return (cred);
378}
379
380/*
381 * Nfs timer routine
382 * Call the nfsd's timer function once/sec.
383 */
384void
385newnfs_timer(void *arg)
386{
387	static time_t lasttime = 0;
388	/*
389	 * Call the server timer, if set up.
390	 * The argument indicates if it is the next second and therefore
391	 * leases should be checked.
392	 */
393	if (lasttime != NFSD_MONOSEC) {
394		lasttime = NFSD_MONOSEC;
395		if (nfsd_call_servertimer != NULL)
396			(*nfsd_call_servertimer)();
397	}
398	callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL);
399}
400
401
402/*
403 * Sleep for a short period of time unless errval == NFSERR_GRACE, where
404 * the sleep should be for 5 seconds.
405 * Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on
406 * an event that never gets a wakeup. Only return EINTR or 0.
407 */
408int
409nfs_catnap(int prio, int errval, const char *wmesg)
410{
411	static int non_event;
412	int ret;
413
414	if (errval == NFSERR_GRACE)
415		ret = tsleep(&non_event, prio, wmesg, 5 * hz);
416	else
417		ret = tsleep(&non_event, prio, wmesg, 1);
418	if (ret != EINTR)
419		ret = 0;
420	return (ret);
421}
422
423/*
424 * Get referral. For now, just fail.
425 */
426struct nfsreferral *
427nfsv4root_getreferral(struct vnode *vp, struct vnode *dvp, u_int32_t fileno)
428{
429
430	return (NULL);
431}
432
433static int
434nfssvc_nfscommon(struct thread *td, struct nfssvc_args *uap)
435{
436	int error;
437
438	error = nfssvc_call(td, uap, td->td_ucred);
439	NFSEXITCODE(error);
440	return (error);
441}
442
443static int
444nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
445{
446	int error = EINVAL;
447	struct nfsd_idargs nid;
448
449	if (uap->flag & NFSSVC_IDNAME) {
450		error = copyin(uap->argp, (caddr_t)&nid, sizeof (nid));
451		if (error)
452			goto out;
453		error = nfssvc_idname(&nid);
454		goto out;
455	} else if (uap->flag & NFSSVC_GETSTATS) {
456		error = copyout(&newnfsstats,
457		    CAST_USER_ADDR_T(uap->argp), sizeof (newnfsstats));
458		if (error == 0) {
459			if ((uap->flag & NFSSVC_ZEROCLTSTATS) != 0) {
460				newnfsstats.attrcache_hits = 0;
461				newnfsstats.attrcache_misses = 0;
462				newnfsstats.lookupcache_hits = 0;
463				newnfsstats.lookupcache_misses = 0;
464				newnfsstats.direofcache_hits = 0;
465				newnfsstats.direofcache_misses = 0;
466				newnfsstats.accesscache_hits = 0;
467				newnfsstats.accesscache_misses = 0;
468				newnfsstats.biocache_reads = 0;
469				newnfsstats.read_bios = 0;
470				newnfsstats.read_physios = 0;
471				newnfsstats.biocache_writes = 0;
472				newnfsstats.write_bios = 0;
473				newnfsstats.write_physios = 0;
474				newnfsstats.biocache_readlinks = 0;
475				newnfsstats.readlink_bios = 0;
476				newnfsstats.biocache_readdirs = 0;
477				newnfsstats.readdir_bios = 0;
478				newnfsstats.rpcretries = 0;
479				newnfsstats.rpcrequests = 0;
480				newnfsstats.rpctimeouts = 0;
481				newnfsstats.rpcunexpected = 0;
482				newnfsstats.rpcinvalid = 0;
483				bzero(newnfsstats.rpccnt,
484				    sizeof(newnfsstats.rpccnt));
485			}
486			if ((uap->flag & NFSSVC_ZEROSRVSTATS) != 0) {
487				newnfsstats.srvrpc_errs = 0;
488				newnfsstats.srv_errs = 0;
489				newnfsstats.srvcache_inproghits = 0;
490				newnfsstats.srvcache_idemdonehits = 0;
491				newnfsstats.srvcache_nonidemdonehits = 0;
492				newnfsstats.srvcache_misses = 0;
493				newnfsstats.srvcache_tcppeak = 0;
494				newnfsstats.srvclients = 0;
495				newnfsstats.srvopenowners = 0;
496				newnfsstats.srvopens = 0;
497				newnfsstats.srvlockowners = 0;
498				newnfsstats.srvlocks = 0;
499				newnfsstats.srvdelegates = 0;
500				newnfsstats.clopenowners = 0;
501				newnfsstats.clopens = 0;
502				newnfsstats.cllockowners = 0;
503				newnfsstats.cllocks = 0;
504				newnfsstats.cldelegates = 0;
505				newnfsstats.cllocalopenowners = 0;
506				newnfsstats.cllocalopens = 0;
507				newnfsstats.cllocallockowners = 0;
508				newnfsstats.cllocallocks = 0;
509				bzero(newnfsstats.srvrpccnt,
510				    sizeof(newnfsstats.srvrpccnt));
511				bzero(newnfsstats.cbrpccnt,
512				    sizeof(newnfsstats.cbrpccnt));
513			}
514		}
515		goto out;
516	} else if (uap->flag & NFSSVC_NFSUSERDPORT) {
517		u_short sockport;
518
519		error = copyin(uap->argp, (caddr_t)&sockport,
520		    sizeof (u_short));
521		if (!error)
522			error = nfsrv_nfsuserdport(sockport, p);
523	} else if (uap->flag & NFSSVC_NFSUSERDDELPORT) {
524		nfsrv_nfsuserddelport();
525		error = 0;
526	}
527
528out:
529	NFSEXITCODE(error);
530	return (error);
531}
532
533/*
534 * called by all three modevent routines, so that it gets things
535 * initialized soon enough.
536 */
537void
538newnfs_portinit(void)
539{
540	static int inited = 0;
541
542	if (inited)
543		return;
544	inited = 1;
545	/* Initialize SMP locks used by both client and server. */
546	mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF);
547	mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF);
548}
549
550/*
551 * Determine if the file system supports NFSv4 ACLs.
552 * Return 1 if it does, 0 otherwise.
553 */
554int
555nfs_supportsnfsv4acls(struct vnode *vp)
556{
557	int error;
558	register_t retval;
559
560	ASSERT_VOP_LOCKED(vp, "nfs supports nfsv4acls");
561
562	if (nfsrv_useacl == 0)
563		return (0);
564	error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
565	if (error == 0 && retval != 0)
566		return (1);
567	return (0);
568}
569
570extern int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *);
571
572/*
573 * Called once to initialize data structures...
574 */
575static int
576nfscommon_modevent(module_t mod, int type, void *data)
577{
578	int error = 0;
579	static int loaded = 0;
580
581	switch (type) {
582	case MOD_LOAD:
583		if (loaded)
584			goto out;
585		newnfs_portinit();
586		mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF);
587		mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF);
588		mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF);
589		mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF);
590		mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL,
591		    MTX_DEF);
592		callout_init(&newnfsd_callout, CALLOUT_MPSAFE);
593		newnfs_init();
594		nfsd_call_nfscommon = nfssvc_nfscommon;
595		loaded = 1;
596		break;
597
598	case MOD_UNLOAD:
599		if (newnfs_numnfsd != 0 || nfsrv_nfsuserd != 0 ||
600		    nfs_numnfscbd != 0) {
601			error = EBUSY;
602			break;
603		}
604
605		nfsd_call_nfscommon = NULL;
606		callout_drain(&newnfsd_callout);
607		/* and get rid of the mutexes */
608		mtx_destroy(&nfs_nameid_mutex);
609		mtx_destroy(&newnfsd_mtx);
610		mtx_destroy(&nfs_state_mutex);
611		mtx_destroy(&nfs_sockl_mutex);
612		mtx_destroy(&nfs_slock_mutex);
613		mtx_destroy(&nfs_req_mutex);
614		mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx);
615		loaded = 0;
616		break;
617	default:
618		error = EOPNOTSUPP;
619		break;
620	}
621
622out:
623	NFSEXITCODE(error);
624	return error;
625}
626static moduledata_t nfscommon_mod = {
627	"nfscommon",
628	nfscommon_modevent,
629	NULL,
630};
631DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY);
632
633/* So that loader and kldload(2) can find us, wherever we are.. */
634MODULE_VERSION(nfscommon, 1);
635MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1);
636MODULE_DEPEND(nfscommon, krpc, 1, 1, 1);
637
638