1/*	$NetBSD: nfs_commonport.c,v 1.2 2016/12/13 22:31:51 pgoyette Exp $	*/
2/*-
3 * Copyright (c) 1989, 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Rick Macklem at The University of Guelph.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 */
34
35#include <sys/cdefs.h>
36/* __FBSDID("FreeBSD: head/sys/fs/nfs/nfs_commonport.c 304026 2016-08-12 22:44:59Z rmacklem "); */
37__RCSID("$NetBSD: nfs_commonport.c,v 1.2 2016/12/13 22:31:51 pgoyette Exp $");
38
39/*
40 * Functions that need to be different for different versions of BSD
41 * kernel should be kept here, along with any global storage specific
42 * to this BSD variant.
43 */
44#include <fs/nfs/common/nfsport.h>
45#include <sys/sysctl.h>
46#include <vm/vm.h>
47#include <vm/vm_object.h>
48#include <vm/vm_page.h>
49#include <vm/vm_param.h>
50#include <vm/vm_map.h>
51#include <vm/vm_kern.h>
52#include <vm/vm_extern.h>
53#include <vm/uma.h>
54
55extern int nfscl_ticks;
56extern int nfsrv_nfsuserd;
57extern struct nfssockreq nfsrv_nfsuserdsock;
58extern void (*nfsd_call_recall)(struct vnode *, int, struct ucred *,
59    struct thread *);
60extern int nfsrv_useacl;
61struct mount nfsv4root_mnt;
62int newnfs_numnfsd = 0;
63struct nfsstatsv1 nfsstatsv1;
64int nfs_numnfscbd = 0;
65int nfscl_debuglevel = 0;
66char nfsv4_callbackaddr[INET6_ADDRSTRLEN];
67struct callout newnfsd_callout;
68int nfsrv_lughashsize = 100;
69void (*nfsd_call_servertimer)(void) = NULL;
70void (*ncl_call_invalcaches)(struct vnode *) = NULL;
71
72static int nfs_realign_test;
73static int nfs_realign_count;
74static struct ext_nfsstats oldnfsstats;
75
76SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem");
77SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test,
78    0, "Number of realign tests done");
79SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count,
80    0, "Number of mbuf realignments done");
81SYSCTL_STRING(_vfs_nfs, OID_AUTO, callback_addr, CTLFLAG_RW,
82    nfsv4_callbackaddr, sizeof(nfsv4_callbackaddr),
83    "NFSv4 callback addr for server to use");
84SYSCTL_INT(_vfs_nfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nfscl_debuglevel,
85    0, "Debug level for NFS client");
86SYSCTL_INT(_vfs_nfs, OID_AUTO, userhashsize, CTLFLAG_RDTUN, &nfsrv_lughashsize,
87    0, "Size of hash tables for uid/name mapping");
88
89/*
90 * Defines for malloc
91 * (Here for FreeBSD, since they allocate storage.)
92 */
93MALLOC_DEFINE(M_NEWNFSRVCACHE, "NFSD srvcache", "NFSD Server Request Cache");
94MALLOC_DEFINE(M_NEWNFSDCLIENT, "NFSD V4client", "NFSD V4 Client Id");
95MALLOC_DEFINE(M_NEWNFSDSTATE, "NFSD V4state",
96    "NFSD V4 State (Openowner, Open, Lockowner, Delegation");
97MALLOC_DEFINE(M_NEWNFSDLOCK, "NFSD V4lock", "NFSD V4 byte range lock");
98MALLOC_DEFINE(M_NEWNFSDLOCKFILE, "NFSD lckfile", "NFSD Open/Lock file");
99MALLOC_DEFINE(M_NEWNFSSTRING, "NFSD string", "NFSD V4 long string");
100MALLOC_DEFINE(M_NEWNFSUSERGROUP, "NFSD usrgroup", "NFSD V4 User/group map");
101MALLOC_DEFINE(M_NEWNFSDREQ, "NFS req", "NFS request header");
102MALLOC_DEFINE(M_NEWNFSFH, "NFS fh", "NFS file handle");
103MALLOC_DEFINE(M_NEWNFSCLOWNER, "NFSCL owner", "NFSCL Open Owner");
104MALLOC_DEFINE(M_NEWNFSCLOPEN, "NFSCL open", "NFSCL Open");
105MALLOC_DEFINE(M_NEWNFSCLDELEG, "NFSCL deleg", "NFSCL Delegation");
106MALLOC_DEFINE(M_NEWNFSCLCLIENT, "NFSCL client", "NFSCL Client");
107MALLOC_DEFINE(M_NEWNFSCLLOCKOWNER, "NFSCL lckown", "NFSCL Lock Owner");
108MALLOC_DEFINE(M_NEWNFSCLLOCK, "NFSCL lck", "NFSCL Lock");
109MALLOC_DEFINE(M_NEWNFSV4NODE, "NEWNFSnode", "NFS vnode");
110MALLOC_DEFINE(M_NEWNFSDIRECTIO, "NEWdirectio", "NFS Direct IO buffer");
111MALLOC_DEFINE(M_NEWNFSDIROFF, "NFSCL diroffdiroff",
112    "NFS directory offset data");
113MALLOC_DEFINE(M_NEWNFSDROLLBACK, "NFSD rollback",
114    "NFS local lock rollback");
115MALLOC_DEFINE(M_NEWNFSLAYOUT, "NFSCL layout", "NFSv4.1 Layout");
116MALLOC_DEFINE(M_NEWNFSFLAYOUT, "NFSCL flayout", "NFSv4.1 File Layout");
117MALLOC_DEFINE(M_NEWNFSDEVINFO, "NFSCL devinfo", "NFSv4.1 Device Info");
118MALLOC_DEFINE(M_NEWNFSSOCKREQ, "NFSCL sockreq", "NFS Sock Req");
119MALLOC_DEFINE(M_NEWNFSCLDS, "NFSCL session", "NFSv4.1 Session");
120MALLOC_DEFINE(M_NEWNFSLAYRECALL, "NFSCL layrecall", "NFSv4.1 Layout Recall");
121MALLOC_DEFINE(M_NEWNFSDSESSION, "NFSD session", "NFSD Session for a client");
122
123/*
124 * Definition of mutex locks.
125 * newnfsd_mtx is used in nfsrvd_nfsd() to protect the nfs socket list
126 * and assorted other nfsd structures.
127 */
128struct mtx newnfsd_mtx;
129struct mtx nfs_sockl_mutex;
130struct mtx nfs_state_mutex;
131struct mtx nfs_nameid_mutex;
132struct mtx nfs_req_mutex;
133struct mtx nfs_slock_mutex;
134
135/* local functions */
136static int nfssvc_call(struct thread *, struct nfssvc_args *, struct ucred *);
137
138#ifdef __NO_STRICT_ALIGNMENT
139/*
140 * These architectures don't need re-alignment, so just return.
141 */
142int
143newnfs_realign(struct mbuf **pm, int how)
144{
145
146	return (0);
147}
148#else	/* !__NO_STRICT_ALIGNMENT */
149/*
150 *	newnfs_realign:
151 *
152 *	Check for badly aligned mbuf data and realign by copying the unaligned
153 *	portion of the data into a new mbuf chain and freeing the portions
154 *	of the old chain that were replaced.
155 *
156 *	We cannot simply realign the data within the existing mbuf chain
157 *	because the underlying buffers may contain other rpc commands and
158 *	we cannot afford to overwrite them.
159 *
160 *	We would prefer to avoid this situation entirely.  The situation does
161 *	not occur with NFS/UDP and is supposed to only occasionally occur
162 *	with TCP.  Use vfs.nfs.realign_count and realign_test to check this.
163 *
164 */
165int
166newnfs_realign(struct mbuf **pm, int how)
167{
168	struct mbuf *m, *n;
169	int off, space;
170
171	++nfs_realign_test;
172	while ((m = *pm) != NULL) {
173		if ((m->m_len & 0x3) || (mtod(m, intptr_t) & 0x3)) {
174			/*
175			 * NB: we can't depend on m_pkthdr.len to help us
176			 * decide what to do here.  May not be worth doing
177			 * the m_length calculation as m_copyback will
178			 * expand the mbuf chain below as needed.
179			 */
180			space = m_length(m, NULL);
181			if (space >= MINCLSIZE) {
182				/* NB: m_copyback handles space > MCLBYTES */
183				n = m_getcl(how, MT_DATA, 0);
184			} else
185				n = m_get(how, MT_DATA);
186			if (n == NULL)
187				return (ENOMEM);
188			/*
189			 * Align the remainder of the mbuf chain.
190			 */
191			n->m_len = 0;
192			off = 0;
193			while (m != NULL) {
194				m_copyback(n, off, m->m_len, mtod(m, caddr_t));
195				off += m->m_len;
196				m = m->m_next;
197			}
198			m_freem(*pm);
199			*pm = n;
200			++nfs_realign_count;
201			break;
202		}
203		pm = &m->m_next;
204	}
205
206	return (0);
207}
208#endif	/* __NO_STRICT_ALIGNMENT */
209
210#ifdef notdef
211static void
212nfsrv_object_create(struct vnode *vp, struct thread *td)
213{
214
215	if (vp == NULL || vp->v_type != VREG)
216		return;
217	(void) vfs_object_create(vp, td, td->td_ucred);
218}
219#endif
220
221/*
222 * Look up a file name. Basically just initialize stuff and call namei().
223 */
224int
225nfsrv_lookupfilename(struct nameidata *ndp, char *fname, NFSPROC_T *p)
226{
227	int error;
228
229	NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fname,
230	    p);
231	error = namei(ndp);
232	if (!error) {
233		NDFREE(ndp, NDF_ONLY_PNBUF);
234	}
235	return (error);
236}
237
238/*
239 * Copy NFS uid, gids to the cred structure.
240 */
241void
242newnfs_copycred(struct nfscred *nfscr, struct ucred *cr)
243{
244
245	KASSERT(nfscr->nfsc_ngroups >= 0,
246	    ("newnfs_copycred: negative nfsc_ngroups"));
247	cr->cr_uid = nfscr->nfsc_uid;
248	crsetgroups(cr, nfscr->nfsc_ngroups, nfscr->nfsc_groups);
249}
250
251/*
252 * Map args from nfsmsleep() to msleep().
253 */
254int
255nfsmsleep(void *chan, void *mutex, int prio, const char *wmesg,
256    struct timespec *ts)
257{
258	u_int64_t nsecval;
259	int error, timeo;
260
261	if (ts) {
262		timeo = hz * ts->tv_sec;
263		nsecval = (u_int64_t)ts->tv_nsec;
264		nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) /
265		    1000000000;
266		timeo += (int)nsecval;
267	} else {
268		timeo = 0;
269	}
270	error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo);
271	return (error);
272}
273
274/*
275 * Get the file system info for the server. For now, just assume FFS.
276 */
277void
278nfsvno_getfs(struct nfsfsinfo *sip, int isdgram)
279{
280	int pref;
281
282	/*
283	 * XXX
284	 * There should be file system VFS OP(s) to get this information.
285	 * For now, assume ufs.
286	 */
287	if (isdgram)
288		pref = NFS_MAXDGRAMDATA;
289	else
290		pref = NFS_SRVMAXIO;
291	sip->fs_rtmax = NFS_SRVMAXIO;
292	sip->fs_rtpref = pref;
293	sip->fs_rtmult = NFS_FABLKSIZE;
294	sip->fs_wtmax = NFS_SRVMAXIO;
295	sip->fs_wtpref = pref;
296	sip->fs_wtmult = NFS_FABLKSIZE;
297	sip->fs_dtpref = pref;
298	sip->fs_maxfilesize = 0xffffffffffffffffull;
299	sip->fs_timedelta.tv_sec = 0;
300	sip->fs_timedelta.tv_nsec = 1;
301	sip->fs_properties = (NFSV3FSINFO_LINK |
302	    NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
303	    NFSV3FSINFO_CANSETTIME);
304}
305
306/*
307 * Do the pathconf vnode op.
308 */
309int
310nfsvno_pathconf(struct vnode *vp, int flag, register_t *retf,
311    struct ucred *cred, struct thread *p)
312{
313	int error;
314
315	error = VOP_PATHCONF(vp, flag, retf);
316	if (error == EOPNOTSUPP || error == EINVAL) {
317		/*
318		 * Some file systems return EINVAL for name arguments not
319		 * supported and some return EOPNOTSUPP for this case.
320		 * So the NFSv3 Pathconf RPC doesn't fail for these cases,
321		 * just fake them.
322		 */
323		switch (flag) {
324		case _PC_LINK_MAX:
325			*retf = LINK_MAX;
326			break;
327		case _PC_NAME_MAX:
328			*retf = NAME_MAX;
329			break;
330		case _PC_CHOWN_RESTRICTED:
331			*retf = 1;
332			break;
333		case _PC_NO_TRUNC:
334			*retf = 1;
335			break;
336		default:
337			/*
338			 * Only happens if a _PC_xxx is added to the server,
339			 * but this isn't updated.
340			 */
341			*retf = 0;
342			printf("nfsrvd pathconf flag=%d not supp\n", flag);
343		}
344		error = 0;
345	}
346	NFSEXITCODE(error);
347	return (error);
348}
349
350/* Fake nfsrv_atroot. Just return 0 */
351int
352nfsrv_atroot(struct vnode *vp, long *retp)
353{
354
355	return (0);
356}
357
358/*
359 * Set the credentials to refer to root.
360 * If only the various BSDen could agree on whether cr_gid is a separate
361 * field or cr_groups[0]...
362 */
363void
364newnfs_setroot(struct ucred *cred)
365{
366
367	cred->cr_uid = 0;
368	cred->cr_groups[0] = 0;
369	cred->cr_ngroups = 1;
370}
371
372/*
373 * Get the client credential. Used for Renew and recovery.
374 */
375struct ucred *
376newnfs_getcred(void)
377{
378	struct ucred *cred;
379	struct thread *td = curthread;
380
381	cred = crdup(td->td_ucred);
382	newnfs_setroot(cred);
383	return (cred);
384}
385
386/*
387 * Nfs timer routine
388 * Call the nfsd's timer function once/sec.
389 */
390void
391newnfs_timer(void *arg)
392{
393	static time_t lasttime = 0;
394	/*
395	 * Call the server timer, if set up.
396	 * The argument indicates if it is the next second and therefore
397	 * leases should be checked.
398	 */
399	if (lasttime != NFSD_MONOSEC) {
400		lasttime = NFSD_MONOSEC;
401		if (nfsd_call_servertimer != NULL)
402			(*nfsd_call_servertimer)();
403	}
404	callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL);
405}
406
407
408/*
409 * Sleep for a short period of time unless errval == NFSERR_GRACE, where
410 * the sleep should be for 5 seconds.
411 * Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on
412 * an event that never gets a wakeup. Only return EINTR or 0.
413 */
414int
415nfs_catnap(int prio, int errval, const char *wmesg)
416{
417	static int non_event;
418	int ret;
419
420	if (errval == NFSERR_GRACE)
421		ret = tsleep(&non_event, prio, wmesg, 5 * hz);
422	else
423		ret = tsleep(&non_event, prio, wmesg, 1);
424	if (ret != EINTR)
425		ret = 0;
426	return (ret);
427}
428
429/*
430 * Get referral. For now, just fail.
431 */
432struct nfsreferral *
433nfsv4root_getreferral(struct vnode *vp, struct vnode *dvp, u_int32_t fileno)
434{
435
436	return (NULL);
437}
438
439static int
440nfssvc_nfscommon(struct thread *td, struct nfssvc_args *uap)
441{
442	int error;
443
444	error = nfssvc_call(td, uap, td->td_ucred);
445	NFSEXITCODE(error);
446	return (error);
447}
448
449static int
450nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
451{
452	int error = EINVAL, i, j;
453	struct nfsd_idargs nid;
454	struct nfsd_oidargs onid;
455	struct {
456		int vers;	/* Just the first field of nfsstats. */
457	} nfsstatver;
458
459	if (uap->flag & NFSSVC_IDNAME) {
460		if ((uap->flag & NFSSVC_NEWSTRUCT) != 0)
461			error = copyin(uap->argp, &nid, sizeof(nid));
462		else {
463			error = copyin(uap->argp, &onid, sizeof(onid));
464			if (error == 0) {
465				nid.nid_flag = onid.nid_flag;
466				nid.nid_uid = onid.nid_uid;
467				nid.nid_gid = onid.nid_gid;
468				nid.nid_usermax = onid.nid_usermax;
469				nid.nid_usertimeout = onid.nid_usertimeout;
470				nid.nid_name = onid.nid_name;
471				nid.nid_namelen = onid.nid_namelen;
472				nid.nid_ngroup = 0;
473				nid.nid_grps = NULL;
474			}
475		}
476		if (error)
477			goto out;
478		error = nfssvc_idname(&nid);
479		goto out;
480	} else if (uap->flag & NFSSVC_GETSTATS) {
481		if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) {
482			/* Copy fields to the old ext_nfsstat structure. */
483			oldnfsstats.attrcache_hits =
484			    nfsstatsv1.attrcache_hits;
485			oldnfsstats.attrcache_misses =
486			    nfsstatsv1.attrcache_misses;
487			oldnfsstats.lookupcache_hits =
488			    nfsstatsv1.lookupcache_hits;
489			oldnfsstats.lookupcache_misses =
490			    nfsstatsv1.lookupcache_misses;
491			oldnfsstats.direofcache_hits =
492			    nfsstatsv1.direofcache_hits;
493			oldnfsstats.direofcache_misses =
494			    nfsstatsv1.direofcache_misses;
495			oldnfsstats.accesscache_hits =
496			    nfsstatsv1.accesscache_hits;
497			oldnfsstats.accesscache_misses =
498			    nfsstatsv1.accesscache_misses;
499			oldnfsstats.biocache_reads =
500			    nfsstatsv1.biocache_reads;
501			oldnfsstats.read_bios =
502			    nfsstatsv1.read_bios;
503			oldnfsstats.read_physios =
504			    nfsstatsv1.read_physios;
505			oldnfsstats.biocache_writes =
506			    nfsstatsv1.biocache_writes;
507			oldnfsstats.write_bios =
508			    nfsstatsv1.write_bios;
509			oldnfsstats.write_physios =
510			    nfsstatsv1.write_physios;
511			oldnfsstats.biocache_readlinks =
512			    nfsstatsv1.biocache_readlinks;
513			oldnfsstats.readlink_bios =
514			    nfsstatsv1.readlink_bios;
515			oldnfsstats.biocache_readdirs =
516			    nfsstatsv1.biocache_readdirs;
517			oldnfsstats.readdir_bios =
518			    nfsstatsv1.readdir_bios;
519			for (i = 0; i < NFSV4_NPROCS; i++)
520				oldnfsstats.rpccnt[i] = nfsstatsv1.rpccnt[i];
521			oldnfsstats.rpcretries = nfsstatsv1.rpcretries;
522			for (i = 0; i < NFSV4OP_NOPS; i++)
523				oldnfsstats.srvrpccnt[i] =
524				    nfsstatsv1.srvrpccnt[i];
525			for (i = NFSV42_NOPS, j = NFSV4OP_NOPS;
526			    i < NFSV42_NOPS + NFSV4OP_FAKENOPS; i++, j++)
527				oldnfsstats.srvrpccnt[j] =
528				    nfsstatsv1.srvrpccnt[i];
529			oldnfsstats.srvrpc_errs = nfsstatsv1.srvrpc_errs;
530			oldnfsstats.srv_errs = nfsstatsv1.srv_errs;
531			oldnfsstats.rpcrequests = nfsstatsv1.rpcrequests;
532			oldnfsstats.rpctimeouts = nfsstatsv1.rpctimeouts;
533			oldnfsstats.rpcunexpected = nfsstatsv1.rpcunexpected;
534			oldnfsstats.rpcinvalid = nfsstatsv1.rpcinvalid;
535			oldnfsstats.srvcache_inproghits =
536			    nfsstatsv1.srvcache_inproghits;
537			oldnfsstats.srvcache_idemdonehits =
538			    nfsstatsv1.srvcache_idemdonehits;
539			oldnfsstats.srvcache_nonidemdonehits =
540			    nfsstatsv1.srvcache_nonidemdonehits;
541			oldnfsstats.srvcache_misses =
542			    nfsstatsv1.srvcache_misses;
543			oldnfsstats.srvcache_tcppeak =
544			    nfsstatsv1.srvcache_tcppeak;
545			oldnfsstats.srvcache_size = nfsstatsv1.srvcache_size;
546			oldnfsstats.srvclients = nfsstatsv1.srvclients;
547			oldnfsstats.srvopenowners = nfsstatsv1.srvopenowners;
548			oldnfsstats.srvopens = nfsstatsv1.srvopens;
549			oldnfsstats.srvlockowners = nfsstatsv1.srvlockowners;
550			oldnfsstats.srvlocks = nfsstatsv1.srvlocks;
551			oldnfsstats.srvdelegates = nfsstatsv1.srvdelegates;
552			for (i = 0; i < NFSV4OP_CBNOPS; i++)
553				oldnfsstats.cbrpccnt[i] =
554				    nfsstatsv1.cbrpccnt[i];
555			oldnfsstats.clopenowners = nfsstatsv1.clopenowners;
556			oldnfsstats.clopens = nfsstatsv1.clopens;
557			oldnfsstats.cllockowners = nfsstatsv1.cllockowners;
558			oldnfsstats.cllocks = nfsstatsv1.cllocks;
559			oldnfsstats.cldelegates = nfsstatsv1.cldelegates;
560			oldnfsstats.cllocalopenowners =
561			    nfsstatsv1.cllocalopenowners;
562			oldnfsstats.cllocalopens = nfsstatsv1.cllocalopens;
563			oldnfsstats.cllocallockowners =
564			    nfsstatsv1.cllocallockowners;
565			oldnfsstats.cllocallocks = nfsstatsv1.cllocallocks;
566			error = copyout(&oldnfsstats, uap->argp,
567			    sizeof (oldnfsstats));
568		} else {
569			error = copyin(uap->argp, &nfsstatver,
570			    sizeof(nfsstatver));
571			if (error == 0 && nfsstatver.vers != NFSSTATS_V1)
572				error = EPERM;
573			if (error == 0)
574				error = copyout(&nfsstatsv1, uap->argp,
575				    sizeof (nfsstatsv1));
576		}
577		if (error == 0) {
578			if ((uap->flag & NFSSVC_ZEROCLTSTATS) != 0) {
579				nfsstatsv1.attrcache_hits = 0;
580				nfsstatsv1.attrcache_misses = 0;
581				nfsstatsv1.lookupcache_hits = 0;
582				nfsstatsv1.lookupcache_misses = 0;
583				nfsstatsv1.direofcache_hits = 0;
584				nfsstatsv1.direofcache_misses = 0;
585				nfsstatsv1.accesscache_hits = 0;
586				nfsstatsv1.accesscache_misses = 0;
587				nfsstatsv1.biocache_reads = 0;
588				nfsstatsv1.read_bios = 0;
589				nfsstatsv1.read_physios = 0;
590				nfsstatsv1.biocache_writes = 0;
591				nfsstatsv1.write_bios = 0;
592				nfsstatsv1.write_physios = 0;
593				nfsstatsv1.biocache_readlinks = 0;
594				nfsstatsv1.readlink_bios = 0;
595				nfsstatsv1.biocache_readdirs = 0;
596				nfsstatsv1.readdir_bios = 0;
597				nfsstatsv1.rpcretries = 0;
598				nfsstatsv1.rpcrequests = 0;
599				nfsstatsv1.rpctimeouts = 0;
600				nfsstatsv1.rpcunexpected = 0;
601				nfsstatsv1.rpcinvalid = 0;
602				bzero(nfsstatsv1.rpccnt,
603				    sizeof(nfsstatsv1.rpccnt));
604			}
605			if ((uap->flag & NFSSVC_ZEROSRVSTATS) != 0) {
606				nfsstatsv1.srvrpc_errs = 0;
607				nfsstatsv1.srv_errs = 0;
608				nfsstatsv1.srvcache_inproghits = 0;
609				nfsstatsv1.srvcache_idemdonehits = 0;
610				nfsstatsv1.srvcache_nonidemdonehits = 0;
611				nfsstatsv1.srvcache_misses = 0;
612				nfsstatsv1.srvcache_tcppeak = 0;
613				nfsstatsv1.srvclients = 0;
614				nfsstatsv1.srvopenowners = 0;
615				nfsstatsv1.srvopens = 0;
616				nfsstatsv1.srvlockowners = 0;
617				nfsstatsv1.srvlocks = 0;
618				nfsstatsv1.srvdelegates = 0;
619				nfsstatsv1.clopenowners = 0;
620				nfsstatsv1.clopens = 0;
621				nfsstatsv1.cllockowners = 0;
622				nfsstatsv1.cllocks = 0;
623				nfsstatsv1.cldelegates = 0;
624				nfsstatsv1.cllocalopenowners = 0;
625				nfsstatsv1.cllocalopens = 0;
626				nfsstatsv1.cllocallockowners = 0;
627				nfsstatsv1.cllocallocks = 0;
628				bzero(nfsstatsv1.srvrpccnt,
629				    sizeof(nfsstatsv1.srvrpccnt));
630				bzero(nfsstatsv1.cbrpccnt,
631				    sizeof(nfsstatsv1.cbrpccnt));
632			}
633		}
634		goto out;
635	} else if (uap->flag & NFSSVC_NFSUSERDPORT) {
636		u_short sockport;
637
638		error = copyin(uap->argp, (caddr_t)&sockport,
639		    sizeof (u_short));
640		if (!error)
641			error = nfsrv_nfsuserdport(sockport, p);
642	} else if (uap->flag & NFSSVC_NFSUSERDDELPORT) {
643		nfsrv_nfsuserddelport();
644		error = 0;
645	}
646
647out:
648	NFSEXITCODE(error);
649	return (error);
650}
651
652/*
653 * called by all three modevent routines, so that it gets things
654 * initialized soon enough.
655 */
656void
657newnfs_portinit(void)
658{
659	static int inited = 0;
660
661	if (inited)
662		return;
663	inited = 1;
664	/* Initialize SMP locks used by both client and server. */
665	mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF);
666	mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF);
667}
668
669/*
670 * Determine if the file system supports NFSv4 ACLs.
671 * Return 1 if it does, 0 otherwise.
672 */
673int
674nfs_supportsnfsv4acls(struct vnode *vp)
675{
676	int error;
677	register_t retval;
678
679	ASSERT_VOP_LOCKED(vp, "nfs supports nfsv4acls");
680
681	if (nfsrv_useacl == 0)
682		return (0);
683	error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
684	if (error == 0 && retval != 0)
685		return (1);
686	return (0);
687}
688
689extern int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *);
690
691/*
692 * Called once to initialize data structures...
693 */
694static int
695nfscommon_modevent(module_t mod, int type, void *data)
696{
697	int error = 0;
698	static int loaded = 0;
699
700	switch (type) {
701	case MOD_LOAD:
702		if (loaded)
703			goto out;
704		newnfs_portinit();
705		mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF);
706		mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF);
707		mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF);
708		mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF);
709		mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL,
710		    MTX_DEF);
711		callout_init(&newnfsd_callout, 1);
712		newnfs_init();
713		nfsd_call_nfscommon = nfssvc_nfscommon;
714		loaded = 1;
715		break;
716
717	case MOD_UNLOAD:
718		if (newnfs_numnfsd != 0 || nfsrv_nfsuserd != 0 ||
719		    nfs_numnfscbd != 0) {
720			error = EBUSY;
721			break;
722		}
723
724		nfsd_call_nfscommon = NULL;
725		callout_drain(&newnfsd_callout);
726		/* Clean out the name<-->id cache. */
727		nfsrv_cleanusergroup();
728		/* and get rid of the mutexes */
729		mtx_destroy(&nfs_nameid_mutex);
730		mtx_destroy(&newnfsd_mtx);
731		mtx_destroy(&nfs_state_mutex);
732		mtx_destroy(&nfs_sockl_mutex);
733		mtx_destroy(&nfs_slock_mutex);
734		mtx_destroy(&nfs_req_mutex);
735		mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx);
736		loaded = 0;
737		break;
738	default:
739		error = EOPNOTSUPP;
740		break;
741	}
742
743out:
744	NFSEXITCODE(error);
745	return error;
746}
747static moduledata_t nfscommon_mod = {
748	"nfscommon",
749	nfscommon_modevent,
750	NULL,
751};
752DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY);
753
754/* So that loader and kldload(2) can find us, wherever we are.. */
755MODULE_VERSION(nfscommon, 1);
756MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1);
757MODULE_DEPEND(nfscommon, krpc, 1, 1, 1);
758
759