nfs_commonport.c revision 244042
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: head/sys/fs/nfs/nfs_commonport.c 244042 2012-12-08 22:52:39Z rmacklem $");
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 */
135void
136newnfs_realign(struct mbuf **pm)
137{
138
139	return;
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 */
158void
159newnfs_realign(struct mbuf **pm)
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(M_WAITOK, MT_DATA, 0);
177			} else
178				n = m_get(M_WAITOK, MT_DATA);
179			if (n == NULL)
180				return;
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#endif	/* __NO_STRICT_ALIGNMENT */
200
201#ifdef notdef
202static void
203nfsrv_object_create(struct vnode *vp, struct thread *td)
204{
205
206	if (vp == NULL || vp->v_type != VREG)
207		return;
208	(void) vfs_object_create(vp, td, td->td_ucred);
209}
210#endif
211
212/*
213 * Look up a file name. Basically just initialize stuff and call namei().
214 */
215int
216nfsrv_lookupfilename(struct nameidata *ndp, char *fname, NFSPROC_T *p)
217{
218	int error;
219
220	NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fname,
221	    p);
222	error = namei(ndp);
223	if (!error) {
224		NDFREE(ndp, NDF_ONLY_PNBUF);
225	}
226	return (error);
227}
228
229/*
230 * Copy NFS uid, gids to the cred structure.
231 */
232void
233newnfs_copycred(struct nfscred *nfscr, struct ucred *cr)
234{
235
236	KASSERT(nfscr->nfsc_ngroups >= 0,
237	    ("newnfs_copycred: negative nfsc_ngroups"));
238	cr->cr_uid = nfscr->nfsc_uid;
239	crsetgroups(cr, nfscr->nfsc_ngroups, nfscr->nfsc_groups);
240}
241
242/*
243 * Map args from nfsmsleep() to msleep().
244 */
245int
246nfsmsleep(void *chan, void *mutex, int prio, const char *wmesg,
247    struct timespec *ts)
248{
249	u_int64_t nsecval;
250	int error, timeo;
251
252	if (ts) {
253		timeo = hz * ts->tv_sec;
254		nsecval = (u_int64_t)ts->tv_nsec;
255		nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) /
256		    1000000000;
257		timeo += (int)nsecval;
258	} else {
259		timeo = 0;
260	}
261	error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo);
262	return (error);
263}
264
265/*
266 * Get the file system info for the server. For now, just assume FFS.
267 */
268void
269nfsvno_getfs(struct nfsfsinfo *sip, int isdgram)
270{
271	int pref;
272
273	/*
274	 * XXX
275	 * There should be file system VFS OP(s) to get this information.
276	 * For now, assume ufs.
277	 */
278	if (isdgram)
279		pref = NFS_MAXDGRAMDATA;
280	else
281		pref = NFS_MAXDATA;
282	sip->fs_rtmax = NFS_MAXDATA;
283	sip->fs_rtpref = pref;
284	sip->fs_rtmult = NFS_FABLKSIZE;
285	sip->fs_wtmax = NFS_MAXDATA;
286	sip->fs_wtpref = pref;
287	sip->fs_wtmult = NFS_FABLKSIZE;
288	sip->fs_dtpref = pref;
289	sip->fs_maxfilesize = 0xffffffffffffffffull;
290	sip->fs_timedelta.tv_sec = 0;
291	sip->fs_timedelta.tv_nsec = 1;
292	sip->fs_properties = (NFSV3FSINFO_LINK |
293	    NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
294	    NFSV3FSINFO_CANSETTIME);
295}
296
297/*
298 * Do the pathconf vnode op.
299 */
300int
301nfsvno_pathconf(struct vnode *vp, int flag, register_t *retf,
302    struct ucred *cred, struct thread *p)
303{
304	int error;
305
306	error = VOP_PATHCONF(vp, flag, retf);
307	if (error == EOPNOTSUPP || error == EINVAL) {
308		/*
309		 * Some file systems return EINVAL for name arguments not
310		 * supported and some return EOPNOTSUPP for this case.
311		 * So the NFSv3 Pathconf RPC doesn't fail for these cases,
312		 * just fake them.
313		 */
314		switch (flag) {
315		case _PC_LINK_MAX:
316			*retf = LINK_MAX;
317			break;
318		case _PC_NAME_MAX:
319			*retf = NAME_MAX;
320			break;
321		case _PC_CHOWN_RESTRICTED:
322			*retf = 1;
323			break;
324		case _PC_NO_TRUNC:
325			*retf = 1;
326			break;
327		default:
328			/*
329			 * Only happens if a _PC_xxx is added to the server,
330			 * but this isn't updated.
331			 */
332			*retf = 0;
333			printf("nfsrvd pathconf flag=%d not supp\n", flag);
334		};
335		error = 0;
336	}
337	NFSEXITCODE(error);
338	return (error);
339}
340
341/* Fake nfsrv_atroot. Just return 0 */
342int
343nfsrv_atroot(struct vnode *vp, long *retp)
344{
345
346	return (0);
347}
348
349/*
350 * Set the credentials to refer to root.
351 * If only the various BSDen could agree on whether cr_gid is a separate
352 * field or cr_groups[0]...
353 */
354void
355newnfs_setroot(struct ucred *cred)
356{
357
358	cred->cr_uid = 0;
359	cred->cr_groups[0] = 0;
360	cred->cr_ngroups = 1;
361}
362
363/*
364 * Get the client credential. Used for Renew and recovery.
365 */
366struct ucred *
367newnfs_getcred(void)
368{
369	struct ucred *cred;
370	struct thread *td = curthread;
371
372	cred = crdup(td->td_ucred);
373	newnfs_setroot(cred);
374	return (cred);
375}
376
377/*
378 * Nfs timer routine
379 * Call the nfsd's timer function once/sec.
380 */
381void
382newnfs_timer(void *arg)
383{
384	static time_t lasttime = 0;
385	/*
386	 * Call the server timer, if set up.
387	 * The argument indicates if it is the next second and therefore
388	 * leases should be checked.
389	 */
390	if (lasttime != NFSD_MONOSEC) {
391		lasttime = NFSD_MONOSEC;
392		if (nfsd_call_servertimer != NULL)
393			(*nfsd_call_servertimer)();
394	}
395	callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL);
396}
397
398
399/*
400 * Sleep for a short period of time unless errval == NFSERR_GRACE, where
401 * the sleep should be for 5 seconds.
402 * Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on
403 * an event that never gets a wakeup. Only return EINTR or 0.
404 */
405int
406nfs_catnap(int prio, int errval, const char *wmesg)
407{
408	static int non_event;
409	int ret;
410
411	if (errval == NFSERR_GRACE)
412		ret = tsleep(&non_event, prio, wmesg, 5 * hz);
413	else
414		ret = tsleep(&non_event, prio, wmesg, 1);
415	if (ret != EINTR)
416		ret = 0;
417	return (ret);
418}
419
420/*
421 * Get referral. For now, just fail.
422 */
423struct nfsreferral *
424nfsv4root_getreferral(struct vnode *vp, struct vnode *dvp, u_int32_t fileno)
425{
426
427	return (NULL);
428}
429
430static int
431nfssvc_nfscommon(struct thread *td, struct nfssvc_args *uap)
432{
433	int error;
434
435	error = nfssvc_call(td, uap, td->td_ucred);
436	NFSEXITCODE(error);
437	return (error);
438}
439
440static int
441nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
442{
443	int error = EINVAL;
444	struct nfsd_idargs nid;
445
446	if (uap->flag & NFSSVC_IDNAME) {
447		error = copyin(uap->argp, (caddr_t)&nid, sizeof (nid));
448		if (error)
449			goto out;
450		error = nfssvc_idname(&nid);
451		goto out;
452	} else if (uap->flag & NFSSVC_GETSTATS) {
453		error = copyout(&newnfsstats,
454		    CAST_USER_ADDR_T(uap->argp), sizeof (newnfsstats));
455		if (error == 0) {
456			if ((uap->flag & NFSSVC_ZEROCLTSTATS) != 0) {
457				newnfsstats.attrcache_hits = 0;
458				newnfsstats.attrcache_misses = 0;
459				newnfsstats.lookupcache_hits = 0;
460				newnfsstats.lookupcache_misses = 0;
461				newnfsstats.direofcache_hits = 0;
462				newnfsstats.direofcache_misses = 0;
463				newnfsstats.accesscache_hits = 0;
464				newnfsstats.accesscache_misses = 0;
465				newnfsstats.biocache_reads = 0;
466				newnfsstats.read_bios = 0;
467				newnfsstats.read_physios = 0;
468				newnfsstats.biocache_writes = 0;
469				newnfsstats.write_bios = 0;
470				newnfsstats.write_physios = 0;
471				newnfsstats.biocache_readlinks = 0;
472				newnfsstats.readlink_bios = 0;
473				newnfsstats.biocache_readdirs = 0;
474				newnfsstats.readdir_bios = 0;
475				newnfsstats.rpcretries = 0;
476				newnfsstats.rpcrequests = 0;
477				newnfsstats.rpctimeouts = 0;
478				newnfsstats.rpcunexpected = 0;
479				newnfsstats.rpcinvalid = 0;
480				bzero(newnfsstats.rpccnt,
481				    sizeof(newnfsstats.rpccnt));
482			}
483			if ((uap->flag & NFSSVC_ZEROSRVSTATS) != 0) {
484				newnfsstats.srvrpc_errs = 0;
485				newnfsstats.srv_errs = 0;
486				newnfsstats.srvcache_inproghits = 0;
487				newnfsstats.srvcache_idemdonehits = 0;
488				newnfsstats.srvcache_nonidemdonehits = 0;
489				newnfsstats.srvcache_misses = 0;
490				newnfsstats.srvcache_tcppeak = 0;
491				newnfsstats.srvclients = 0;
492				newnfsstats.srvopenowners = 0;
493				newnfsstats.srvopens = 0;
494				newnfsstats.srvlockowners = 0;
495				newnfsstats.srvlocks = 0;
496				newnfsstats.srvdelegates = 0;
497				newnfsstats.clopenowners = 0;
498				newnfsstats.clopens = 0;
499				newnfsstats.cllockowners = 0;
500				newnfsstats.cllocks = 0;
501				newnfsstats.cldelegates = 0;
502				newnfsstats.cllocalopenowners = 0;
503				newnfsstats.cllocalopens = 0;
504				newnfsstats.cllocallockowners = 0;
505				newnfsstats.cllocallocks = 0;
506				bzero(newnfsstats.srvrpccnt,
507				    sizeof(newnfsstats.srvrpccnt));
508				bzero(newnfsstats.cbrpccnt,
509				    sizeof(newnfsstats.cbrpccnt));
510			}
511		}
512		goto out;
513	} else if (uap->flag & NFSSVC_NFSUSERDPORT) {
514		u_short sockport;
515
516		error = copyin(uap->argp, (caddr_t)&sockport,
517		    sizeof (u_short));
518		if (!error)
519			error = nfsrv_nfsuserdport(sockport, p);
520	} else if (uap->flag & NFSSVC_NFSUSERDDELPORT) {
521		nfsrv_nfsuserddelport();
522		error = 0;
523	}
524
525out:
526	NFSEXITCODE(error);
527	return (error);
528}
529
530/*
531 * called by all three modevent routines, so that it gets things
532 * initialized soon enough.
533 */
534void
535newnfs_portinit(void)
536{
537	static int inited = 0;
538
539	if (inited)
540		return;
541	inited = 1;
542	/* Initialize SMP locks used by both client and server. */
543	mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF);
544	mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF);
545}
546
547/*
548 * Determine if the file system supports NFSv4 ACLs.
549 * Return 1 if it does, 0 otherwise.
550 */
551int
552nfs_supportsnfsv4acls(struct vnode *vp)
553{
554	int error;
555	register_t retval;
556
557	ASSERT_VOP_LOCKED(vp, "nfs supports nfsv4acls");
558
559	if (nfsrv_useacl == 0)
560		return (0);
561	error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
562	if (error == 0 && retval != 0)
563		return (1);
564	return (0);
565}
566
567extern int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *);
568
569/*
570 * Called once to initialize data structures...
571 */
572static int
573nfscommon_modevent(module_t mod, int type, void *data)
574{
575	int error = 0;
576	static int loaded = 0;
577
578	switch (type) {
579	case MOD_LOAD:
580		if (loaded)
581			goto out;
582		newnfs_portinit();
583		mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF);
584		mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF);
585		mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF);
586		mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF);
587		mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL,
588		    MTX_DEF);
589		callout_init(&newnfsd_callout, CALLOUT_MPSAFE);
590		newnfs_init();
591		nfsd_call_nfscommon = nfssvc_nfscommon;
592		loaded = 1;
593		break;
594
595	case MOD_UNLOAD:
596		if (newnfs_numnfsd != 0 || nfsrv_nfsuserd != 0 ||
597		    nfs_numnfscbd != 0) {
598			error = EBUSY;
599			break;
600		}
601
602		nfsd_call_nfscommon = NULL;
603		callout_drain(&newnfsd_callout);
604		/* and get rid of the mutexes */
605		mtx_destroy(&nfs_nameid_mutex);
606		mtx_destroy(&newnfsd_mtx);
607		mtx_destroy(&nfs_state_mutex);
608		mtx_destroy(&nfs_sockl_mutex);
609		mtx_destroy(&nfs_slock_mutex);
610		mtx_destroy(&nfs_req_mutex);
611		mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx);
612		loaded = 0;
613		break;
614	default:
615		error = EOPNOTSUPP;
616		break;
617	}
618
619out:
620	NFSEXITCODE(error);
621	return error;
622}
623static moduledata_t nfscommon_mod = {
624	"nfscommon",
625	nfscommon_modevent,
626	NULL,
627};
628DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY);
629
630/* So that loader and kldload(2) can find us, wherever we are.. */
631MODULE_VERSION(nfscommon, 1);
632MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1);
633MODULE_DEPEND(nfscommon, krpc, 1, 1, 1);
634
635