xref: /freebsd/sys/fs/nfs/nfs_commonport.c (revision 681ce946f33e75c590e97c53076e86dff1fe8f4a)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1989, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Rick Macklem at The University of Guelph.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  */
35 
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
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/nfsport.h>
45 #include <sys/smp.h>
46 #include <sys/sysctl.h>
47 #include <sys/taskqueue.h>
48 #include <rpc/rpc_com.h>
49 #include <vm/vm.h>
50 #include <vm/vm_object.h>
51 #include <vm/vm_page.h>
52 #include <vm/vm_param.h>
53 #include <vm/vm_map.h>
54 #include <vm/vm_kern.h>
55 #include <vm/vm_extern.h>
56 #include <vm/uma.h>
57 
58 extern int nfscl_ticks;
59 extern nfsuserd_state nfsrv_nfsuserd;
60 extern struct nfssockreq nfsrv_nfsuserdsock;
61 extern void (*nfsd_call_recall)(struct vnode *, int, struct ucred *,
62     struct thread *);
63 extern int nfsrv_useacl;
64 struct mount nfsv4root_mnt;
65 int newnfs_numnfsd = 0;
66 struct nfsstatsv1 nfsstatsv1;
67 int nfs_numnfscbd = 0;
68 int nfscl_debuglevel = 0;
69 char nfsv4_callbackaddr[INET6_ADDRSTRLEN];
70 struct callout newnfsd_callout;
71 int nfsrv_lughashsize = 100;
72 struct mtx nfsrv_dslock_mtx;
73 struct nfsdevicehead nfsrv_devidhead;
74 volatile int nfsrv_devidcnt = 0;
75 void (*nfsd_call_servertimer)(void) = NULL;
76 void (*ncl_call_invalcaches)(struct vnode *) = NULL;
77 vop_advlock_t *nfs_advlock_p = NULL;
78 vop_reclaim_t *nfs_reclaim_p = NULL;
79 uint32_t nfs_srvmaxio = NFS_SRVMAXIO;
80 
81 int nfs_pnfsio(task_fn_t *, void *);
82 
83 static int nfs_realign_test;
84 static int nfs_realign_count;
85 static struct ext_nfsstats oldnfsstats;
86 static struct nfsstatsov1 nfsstatsov1;
87 
88 SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
89     "NFS filesystem");
90 SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_test, CTLFLAG_RW, &nfs_realign_test,
91     0, "Number of realign tests done");
92 SYSCTL_INT(_vfs_nfs, OID_AUTO, realign_count, CTLFLAG_RW, &nfs_realign_count,
93     0, "Number of mbuf realignments done");
94 SYSCTL_STRING(_vfs_nfs, OID_AUTO, callback_addr, CTLFLAG_RW,
95     nfsv4_callbackaddr, sizeof(nfsv4_callbackaddr),
96     "NFSv4 callback addr for server to use");
97 SYSCTL_INT(_vfs_nfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nfscl_debuglevel,
98     0, "Debug level for NFS client");
99 SYSCTL_INT(_vfs_nfs, OID_AUTO, userhashsize, CTLFLAG_RDTUN, &nfsrv_lughashsize,
100     0, "Size of hash tables for uid/name mapping");
101 int nfs_pnfsiothreads = -1;
102 SYSCTL_INT(_vfs_nfs, OID_AUTO, pnfsiothreads, CTLFLAG_RW, &nfs_pnfsiothreads,
103     0, "Number of pNFS mirror I/O threads");
104 
105 /*
106  * Defines for malloc
107  * (Here for FreeBSD, since they allocate storage.)
108  */
109 MALLOC_DEFINE(M_NEWNFSRVCACHE, "NFSD srvcache", "NFSD Server Request Cache");
110 MALLOC_DEFINE(M_NEWNFSDCLIENT, "NFSD V4client", "NFSD V4 Client Id");
111 MALLOC_DEFINE(M_NEWNFSDSTATE, "NFSD V4state",
112     "NFSD V4 State (Openowner, Open, Lockowner, Delegation");
113 MALLOC_DEFINE(M_NEWNFSDLOCK, "NFSD V4lock", "NFSD V4 byte range lock");
114 MALLOC_DEFINE(M_NEWNFSDLOCKFILE, "NFSD lckfile", "NFSD Open/Lock file");
115 MALLOC_DEFINE(M_NEWNFSSTRING, "NFSD string", "NFSD V4 long string");
116 MALLOC_DEFINE(M_NEWNFSUSERGROUP, "NFSD usrgroup", "NFSD V4 User/group map");
117 MALLOC_DEFINE(M_NEWNFSDREQ, "NFS req", "NFS request header");
118 MALLOC_DEFINE(M_NEWNFSFH, "NFS fh", "NFS file handle");
119 MALLOC_DEFINE(M_NEWNFSCLOWNER, "NFSCL owner", "NFSCL Open Owner");
120 MALLOC_DEFINE(M_NEWNFSCLOPEN, "NFSCL open", "NFSCL Open");
121 MALLOC_DEFINE(M_NEWNFSCLDELEG, "NFSCL deleg", "NFSCL Delegation");
122 MALLOC_DEFINE(M_NEWNFSCLCLIENT, "NFSCL client", "NFSCL Client");
123 MALLOC_DEFINE(M_NEWNFSCLLOCKOWNER, "NFSCL lckown", "NFSCL Lock Owner");
124 MALLOC_DEFINE(M_NEWNFSCLLOCK, "NFSCL lck", "NFSCL Lock");
125 MALLOC_DEFINE(M_NEWNFSV4NODE, "NEWNFSnode", "NFS vnode");
126 MALLOC_DEFINE(M_NEWNFSDIRECTIO, "NEWdirectio", "NFS Direct IO buffer");
127 MALLOC_DEFINE(M_NEWNFSDIROFF, "NFSCL diroff",
128     "NFS directory offset data");
129 MALLOC_DEFINE(M_NEWNFSDROLLBACK, "NFSD rollback",
130     "NFS local lock rollback");
131 MALLOC_DEFINE(M_NEWNFSLAYOUT, "NFSCL layout", "NFSv4.1 Layout");
132 MALLOC_DEFINE(M_NEWNFSFLAYOUT, "NFSCL flayout", "NFSv4.1 File Layout");
133 MALLOC_DEFINE(M_NEWNFSDEVINFO, "NFSCL devinfo", "NFSv4.1 Device Info");
134 MALLOC_DEFINE(M_NEWNFSSOCKREQ, "NFSCL sockreq", "NFS Sock Req");
135 MALLOC_DEFINE(M_NEWNFSCLDS, "NFSCL session", "NFSv4.1 Session");
136 MALLOC_DEFINE(M_NEWNFSLAYRECALL, "NFSCL layrecall", "NFSv4.1 Layout Recall");
137 MALLOC_DEFINE(M_NEWNFSDSESSION, "NFSD session", "NFSD Session for a client");
138 
139 /*
140  * Definition of mutex locks.
141  * newnfsd_mtx is used in nfsrvd_nfsd() to protect the nfs socket list
142  * and assorted other nfsd structures.
143  */
144 struct mtx newnfsd_mtx;
145 struct mtx nfs_sockl_mutex;
146 struct mtx nfs_state_mutex;
147 struct mtx nfs_nameid_mutex;
148 struct mtx nfs_req_mutex;
149 struct mtx nfs_slock_mutex;
150 struct mtx nfs_clstate_mutex;
151 
152 /* local functions */
153 static int nfssvc_call(struct thread *, struct nfssvc_args *, struct ucred *);
154 
155 #ifdef __NO_STRICT_ALIGNMENT
156 /*
157  * These architectures don't need re-alignment, so just return.
158  */
159 int
160 newnfs_realign(struct mbuf **pm, int how)
161 {
162 
163 	return (0);
164 }
165 #else	/* !__NO_STRICT_ALIGNMENT */
166 /*
167  *	newnfs_realign:
168  *
169  *	Check for badly aligned mbuf data and realign by copying the unaligned
170  *	portion of the data into a new mbuf chain and freeing the portions
171  *	of the old chain that were replaced.
172  *
173  *	We cannot simply realign the data within the existing mbuf chain
174  *	because the underlying buffers may contain other rpc commands and
175  *	we cannot afford to overwrite them.
176  *
177  *	We would prefer to avoid this situation entirely.  The situation does
178  *	not occur with NFS/UDP and is supposed to only occasionally occur
179  *	with TCP.  Use vfs.nfs.realign_count and realign_test to check this.
180  *
181  */
182 int
183 newnfs_realign(struct mbuf **pm, int how)
184 {
185 	struct mbuf *m, *n;
186 	int off, space;
187 
188 	++nfs_realign_test;
189 	while ((m = *pm) != NULL) {
190 		if ((m->m_len & 0x3) || (mtod(m, intptr_t) & 0x3)) {
191 			/*
192 			 * NB: we can't depend on m_pkthdr.len to help us
193 			 * decide what to do here.  May not be worth doing
194 			 * the m_length calculation as m_copyback will
195 			 * expand the mbuf chain below as needed.
196 			 */
197 			space = m_length(m, NULL);
198 			if (space >= MINCLSIZE) {
199 				/* NB: m_copyback handles space > MCLBYTES */
200 				n = m_getcl(how, MT_DATA, 0);
201 			} else
202 				n = m_get(how, MT_DATA);
203 			if (n == NULL)
204 				return (ENOMEM);
205 			/*
206 			 * Align the remainder of the mbuf chain.
207 			 */
208 			n->m_len = 0;
209 			off = 0;
210 			while (m != NULL) {
211 				m_copyback(n, off, m->m_len, mtod(m, caddr_t));
212 				off += m->m_len;
213 				m = m->m_next;
214 			}
215 			m_freem(*pm);
216 			*pm = n;
217 			++nfs_realign_count;
218 			break;
219 		}
220 		pm = &m->m_next;
221 	}
222 
223 	return (0);
224 }
225 #endif	/* __NO_STRICT_ALIGNMENT */
226 
227 #ifdef notdef
228 static void
229 nfsrv_object_create(struct vnode *vp, struct thread *td)
230 {
231 
232 	if (vp == NULL || vp->v_type != VREG)
233 		return;
234 	(void) vfs_object_create(vp, td, td->td_ucred);
235 }
236 #endif
237 
238 /*
239  * Look up a file name. Basically just initialize stuff and call namei().
240  */
241 int
242 nfsrv_lookupfilename(struct nameidata *ndp, char *fname, NFSPROC_T *p __unused)
243 {
244 	int error;
245 
246 	NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, fname);
247 	error = namei(ndp);
248 	if (!error) {
249 		NDFREE(ndp, NDF_ONLY_PNBUF);
250 	}
251 	return (error);
252 }
253 
254 /*
255  * Copy NFS uid, gids to the cred structure.
256  */
257 void
258 newnfs_copycred(struct nfscred *nfscr, struct ucred *cr)
259 {
260 
261 	KASSERT(nfscr->nfsc_ngroups >= 0,
262 	    ("newnfs_copycred: negative nfsc_ngroups"));
263 	cr->cr_uid = nfscr->nfsc_uid;
264 	crsetgroups(cr, nfscr->nfsc_ngroups, nfscr->nfsc_groups);
265 }
266 
267 /*
268  * Map args from nfsmsleep() to msleep().
269  */
270 int
271 nfsmsleep(void *chan, void *mutex, int prio, const char *wmesg,
272     struct timespec *ts)
273 {
274 	u_int64_t nsecval;
275 	int error, timeo;
276 
277 	if (ts) {
278 		timeo = hz * ts->tv_sec;
279 		nsecval = (u_int64_t)ts->tv_nsec;
280 		nsecval = ((nsecval * ((u_int64_t)hz)) + 500000000) /
281 		    1000000000;
282 		timeo += (int)nsecval;
283 	} else {
284 		timeo = 0;
285 	}
286 	error = msleep(chan, (struct mtx *)mutex, prio, wmesg, timeo);
287 	return (error);
288 }
289 
290 /*
291  * Get the file system info for the server. For now, just assume FFS.
292  */
293 void
294 nfsvno_getfs(struct nfsfsinfo *sip, int isdgram)
295 {
296 	int pref;
297 
298 	/*
299 	 * XXX
300 	 * There should be file system VFS OP(s) to get this information.
301 	 * For now, assume ufs.
302 	 */
303 	if (isdgram)
304 		pref = NFS_MAXDGRAMDATA;
305 	else
306 		pref = nfs_srvmaxio;
307 	sip->fs_rtmax = nfs_srvmaxio;
308 	sip->fs_rtpref = pref;
309 	sip->fs_rtmult = NFS_FABLKSIZE;
310 	sip->fs_wtmax = nfs_srvmaxio;
311 	sip->fs_wtpref = pref;
312 	sip->fs_wtmult = NFS_FABLKSIZE;
313 	sip->fs_dtpref = pref;
314 	sip->fs_maxfilesize = 0xffffffffffffffffull;
315 	sip->fs_timedelta.tv_sec = 0;
316 	sip->fs_timedelta.tv_nsec = 1;
317 	sip->fs_properties = (NFSV3FSINFO_LINK |
318 	    NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS |
319 	    NFSV3FSINFO_CANSETTIME);
320 }
321 
322 /*
323  * Do the pathconf vnode op.
324  */
325 int
326 nfsvno_pathconf(struct vnode *vp, int flag, long *retf,
327     struct ucred *cred, struct thread *p)
328 {
329 	int error;
330 
331 	error = VOP_PATHCONF(vp, flag, retf);
332 	if (error == EOPNOTSUPP || error == EINVAL) {
333 		/*
334 		 * Some file systems return EINVAL for name arguments not
335 		 * supported and some return EOPNOTSUPP for this case.
336 		 * So the NFSv3 Pathconf RPC doesn't fail for these cases,
337 		 * just fake them.
338 		 */
339 		switch (flag) {
340 		case _PC_LINK_MAX:
341 			*retf = NFS_LINK_MAX;
342 			break;
343 		case _PC_NAME_MAX:
344 			*retf = NAME_MAX;
345 			break;
346 		case _PC_CHOWN_RESTRICTED:
347 			*retf = 1;
348 			break;
349 		case _PC_NO_TRUNC:
350 			*retf = 1;
351 			break;
352 		default:
353 			/*
354 			 * Only happens if a _PC_xxx is added to the server,
355 			 * but this isn't updated.
356 			 */
357 			*retf = 0;
358 			printf("nfsrvd pathconf flag=%d not supp\n", flag);
359 		}
360 		error = 0;
361 	}
362 	NFSEXITCODE(error);
363 	return (error);
364 }
365 
366 /* Fake nfsrv_atroot. Just return 0 */
367 int
368 nfsrv_atroot(struct vnode *vp, uint64_t *retp)
369 {
370 
371 	return (0);
372 }
373 
374 /*
375  * Set the credentials to refer to root.
376  * If only the various BSDen could agree on whether cr_gid is a separate
377  * field or cr_groups[0]...
378  */
379 void
380 newnfs_setroot(struct ucred *cred)
381 {
382 
383 	cred->cr_uid = 0;
384 	cred->cr_groups[0] = 0;
385 	cred->cr_ngroups = 1;
386 }
387 
388 /*
389  * Get the client credential. Used for Renew and recovery.
390  */
391 struct ucred *
392 newnfs_getcred(void)
393 {
394 	struct ucred *cred;
395 	struct thread *td = curthread;
396 
397 	cred = crdup(td->td_ucred);
398 	newnfs_setroot(cred);
399 	return (cred);
400 }
401 
402 /*
403  * Nfs timer routine
404  * Call the nfsd's timer function once/sec.
405  */
406 void
407 newnfs_timer(void *arg)
408 {
409 	static time_t lasttime = 0;
410 	/*
411 	 * Call the server timer, if set up.
412 	 * The argument indicates if it is the next second and therefore
413 	 * leases should be checked.
414 	 */
415 	if (lasttime != NFSD_MONOSEC) {
416 		lasttime = NFSD_MONOSEC;
417 		if (nfsd_call_servertimer != NULL)
418 			(*nfsd_call_servertimer)();
419 	}
420 	callout_reset(&newnfsd_callout, nfscl_ticks, newnfs_timer, NULL);
421 }
422 
423 /*
424  * Sleep for a short period of time unless errval == NFSERR_GRACE, where
425  * the sleep should be for 5 seconds.
426  * Since lbolt doesn't exist in FreeBSD-CURRENT, just use a timeout on
427  * an event that never gets a wakeup. Only return EINTR or 0.
428  */
429 int
430 nfs_catnap(int prio, int errval, const char *wmesg)
431 {
432 	static int non_event;
433 	int ret;
434 
435 	if (errval == NFSERR_GRACE)
436 		ret = tsleep(&non_event, prio, wmesg, 5 * hz);
437 	else
438 		ret = tsleep(&non_event, prio, wmesg, 1);
439 	if (ret != EINTR)
440 		ret = 0;
441 	return (ret);
442 }
443 
444 /*
445  * Get referral. For now, just fail.
446  */
447 struct nfsreferral *
448 nfsv4root_getreferral(struct vnode *vp, struct vnode *dvp, u_int32_t fileno)
449 {
450 
451 	return (NULL);
452 }
453 
454 static int
455 nfssvc_nfscommon(struct thread *td, struct nfssvc_args *uap)
456 {
457 	int error;
458 
459 	error = nfssvc_call(td, uap, td->td_ucred);
460 	NFSEXITCODE(error);
461 	return (error);
462 }
463 
464 static int
465 nfssvc_call(struct thread *p, struct nfssvc_args *uap, struct ucred *cred)
466 {
467 	int error = EINVAL, i, j;
468 	struct nfsd_idargs nid;
469 	struct nfsd_oidargs onid;
470 	struct {
471 		int vers;	/* Just the first field of nfsstats. */
472 	} nfsstatver;
473 
474 	if (uap->flag & NFSSVC_IDNAME) {
475 		if ((uap->flag & NFSSVC_NEWSTRUCT) != 0)
476 			error = copyin(uap->argp, &nid, sizeof(nid));
477 		else {
478 			error = copyin(uap->argp, &onid, sizeof(onid));
479 			if (error == 0) {
480 				nid.nid_flag = onid.nid_flag;
481 				nid.nid_uid = onid.nid_uid;
482 				nid.nid_gid = onid.nid_gid;
483 				nid.nid_usermax = onid.nid_usermax;
484 				nid.nid_usertimeout = onid.nid_usertimeout;
485 				nid.nid_name = onid.nid_name;
486 				nid.nid_namelen = onid.nid_namelen;
487 				nid.nid_ngroup = 0;
488 				nid.nid_grps = NULL;
489 			}
490 		}
491 		if (error)
492 			goto out;
493 		error = nfssvc_idname(&nid);
494 		goto out;
495 	} else if (uap->flag & NFSSVC_GETSTATS) {
496 		if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) {
497 			/* Copy fields to the old ext_nfsstat structure. */
498 			oldnfsstats.attrcache_hits =
499 			    nfsstatsv1.attrcache_hits;
500 			oldnfsstats.attrcache_misses =
501 			    nfsstatsv1.attrcache_misses;
502 			oldnfsstats.lookupcache_hits =
503 			    nfsstatsv1.lookupcache_hits;
504 			oldnfsstats.lookupcache_misses =
505 			    nfsstatsv1.lookupcache_misses;
506 			oldnfsstats.direofcache_hits =
507 			    nfsstatsv1.direofcache_hits;
508 			oldnfsstats.direofcache_misses =
509 			    nfsstatsv1.direofcache_misses;
510 			oldnfsstats.accesscache_hits =
511 			    nfsstatsv1.accesscache_hits;
512 			oldnfsstats.accesscache_misses =
513 			    nfsstatsv1.accesscache_misses;
514 			oldnfsstats.biocache_reads =
515 			    nfsstatsv1.biocache_reads;
516 			oldnfsstats.read_bios =
517 			    nfsstatsv1.read_bios;
518 			oldnfsstats.read_physios =
519 			    nfsstatsv1.read_physios;
520 			oldnfsstats.biocache_writes =
521 			    nfsstatsv1.biocache_writes;
522 			oldnfsstats.write_bios =
523 			    nfsstatsv1.write_bios;
524 			oldnfsstats.write_physios =
525 			    nfsstatsv1.write_physios;
526 			oldnfsstats.biocache_readlinks =
527 			    nfsstatsv1.biocache_readlinks;
528 			oldnfsstats.readlink_bios =
529 			    nfsstatsv1.readlink_bios;
530 			oldnfsstats.biocache_readdirs =
531 			    nfsstatsv1.biocache_readdirs;
532 			oldnfsstats.readdir_bios =
533 			    nfsstatsv1.readdir_bios;
534 			for (i = 0; i < NFSV4_NPROCS; i++)
535 				oldnfsstats.rpccnt[i] = nfsstatsv1.rpccnt[i];
536 			oldnfsstats.rpcretries = nfsstatsv1.rpcretries;
537 			for (i = 0; i < NFSV4OP_NOPS; i++)
538 				oldnfsstats.srvrpccnt[i] =
539 				    nfsstatsv1.srvrpccnt[i];
540 			for (i = NFSV42_NOPS, j = NFSV4OP_NOPS;
541 			    i < NFSV42_NOPS + NFSV4OP_FAKENOPS; i++, j++)
542 				oldnfsstats.srvrpccnt[j] =
543 				    nfsstatsv1.srvrpccnt[i];
544 			oldnfsstats.reserved_0 = 0;
545 			oldnfsstats.reserved_1 = 0;
546 			oldnfsstats.rpcrequests = nfsstatsv1.rpcrequests;
547 			oldnfsstats.rpctimeouts = nfsstatsv1.rpctimeouts;
548 			oldnfsstats.rpcunexpected = nfsstatsv1.rpcunexpected;
549 			oldnfsstats.rpcinvalid = nfsstatsv1.rpcinvalid;
550 			oldnfsstats.srvcache_inproghits =
551 			    nfsstatsv1.srvcache_inproghits;
552 			oldnfsstats.reserved_2 = 0;
553 			oldnfsstats.srvcache_nonidemdonehits =
554 			    nfsstatsv1.srvcache_nonidemdonehits;
555 			oldnfsstats.srvcache_misses =
556 			    nfsstatsv1.srvcache_misses;
557 			oldnfsstats.srvcache_tcppeak =
558 			    nfsstatsv1.srvcache_tcppeak;
559 			oldnfsstats.srvcache_size = nfsstatsv1.srvcache_size;
560 			oldnfsstats.srvclients = nfsstatsv1.srvclients;
561 			oldnfsstats.srvopenowners = nfsstatsv1.srvopenowners;
562 			oldnfsstats.srvopens = nfsstatsv1.srvopens;
563 			oldnfsstats.srvlockowners = nfsstatsv1.srvlockowners;
564 			oldnfsstats.srvlocks = nfsstatsv1.srvlocks;
565 			oldnfsstats.srvdelegates = nfsstatsv1.srvdelegates;
566 			for (i = 0; i < NFSV4OP_CBNOPS; i++)
567 				oldnfsstats.cbrpccnt[i] =
568 				    nfsstatsv1.cbrpccnt[i];
569 			oldnfsstats.clopenowners = nfsstatsv1.clopenowners;
570 			oldnfsstats.clopens = nfsstatsv1.clopens;
571 			oldnfsstats.cllockowners = nfsstatsv1.cllockowners;
572 			oldnfsstats.cllocks = nfsstatsv1.cllocks;
573 			oldnfsstats.cldelegates = nfsstatsv1.cldelegates;
574 			oldnfsstats.cllocalopenowners =
575 			    nfsstatsv1.cllocalopenowners;
576 			oldnfsstats.cllocalopens = nfsstatsv1.cllocalopens;
577 			oldnfsstats.cllocallockowners =
578 			    nfsstatsv1.cllocallockowners;
579 			oldnfsstats.cllocallocks = nfsstatsv1.cllocallocks;
580 			error = copyout(&oldnfsstats, uap->argp,
581 			    sizeof (oldnfsstats));
582 		} else {
583 			error = copyin(uap->argp, &nfsstatver,
584 			    sizeof(nfsstatver));
585 			if (error == 0) {
586 				if (nfsstatver.vers == NFSSTATS_OV1) {
587 					/* Copy nfsstatsv1 to nfsstatsov1. */
588 					nfsstatsov1.attrcache_hits =
589 					    nfsstatsv1.attrcache_hits;
590 					nfsstatsov1.attrcache_misses =
591 					    nfsstatsv1.attrcache_misses;
592 					nfsstatsov1.lookupcache_hits =
593 					    nfsstatsv1.lookupcache_hits;
594 					nfsstatsov1.lookupcache_misses =
595 					    nfsstatsv1.lookupcache_misses;
596 					nfsstatsov1.direofcache_hits =
597 					    nfsstatsv1.direofcache_hits;
598 					nfsstatsov1.direofcache_misses =
599 					    nfsstatsv1.direofcache_misses;
600 					nfsstatsov1.accesscache_hits =
601 					    nfsstatsv1.accesscache_hits;
602 					nfsstatsov1.accesscache_misses =
603 					    nfsstatsv1.accesscache_misses;
604 					nfsstatsov1.biocache_reads =
605 					    nfsstatsv1.biocache_reads;
606 					nfsstatsov1.read_bios =
607 					    nfsstatsv1.read_bios;
608 					nfsstatsov1.read_physios =
609 					    nfsstatsv1.read_physios;
610 					nfsstatsov1.biocache_writes =
611 					    nfsstatsv1.biocache_writes;
612 					nfsstatsov1.write_bios =
613 					    nfsstatsv1.write_bios;
614 					nfsstatsov1.write_physios =
615 					    nfsstatsv1.write_physios;
616 					nfsstatsov1.biocache_readlinks =
617 					    nfsstatsv1.biocache_readlinks;
618 					nfsstatsov1.readlink_bios =
619 					    nfsstatsv1.readlink_bios;
620 					nfsstatsov1.biocache_readdirs =
621 					    nfsstatsv1.biocache_readdirs;
622 					nfsstatsov1.readdir_bios =
623 					    nfsstatsv1.readdir_bios;
624 					for (i = 0; i < NFSV42_NPROCS; i++)
625 						nfsstatsov1.rpccnt[i] =
626 						    nfsstatsv1.rpccnt[i];
627 					nfsstatsov1.rpcretries =
628 					    nfsstatsv1.rpcretries;
629 					for (i = 0; i < NFSV42_PURENOPS; i++)
630 						nfsstatsov1.srvrpccnt[i] =
631 						    nfsstatsv1.srvrpccnt[i];
632 					for (i = NFSV42_NOPS,
633 					     j = NFSV42_PURENOPS;
634 					     i < NFSV42_NOPS + NFSV4OP_FAKENOPS;
635 					     i++, j++)
636 						nfsstatsov1.srvrpccnt[j] =
637 						    nfsstatsv1.srvrpccnt[i];
638 					nfsstatsov1.reserved_0 = 0;
639 					nfsstatsov1.reserved_1 = 0;
640 					nfsstatsov1.rpcrequests =
641 					    nfsstatsv1.rpcrequests;
642 					nfsstatsov1.rpctimeouts =
643 					    nfsstatsv1.rpctimeouts;
644 					nfsstatsov1.rpcunexpected =
645 					    nfsstatsv1.rpcunexpected;
646 					nfsstatsov1.rpcinvalid =
647 					    nfsstatsv1.rpcinvalid;
648 					nfsstatsov1.srvcache_inproghits =
649 					    nfsstatsv1.srvcache_inproghits;
650 					nfsstatsov1.reserved_2 = 0;
651 					nfsstatsov1.srvcache_nonidemdonehits =
652 					    nfsstatsv1.srvcache_nonidemdonehits;
653 					nfsstatsov1.srvcache_misses =
654 					    nfsstatsv1.srvcache_misses;
655 					nfsstatsov1.srvcache_tcppeak =
656 					    nfsstatsv1.srvcache_tcppeak;
657 					nfsstatsov1.srvcache_size =
658 					    nfsstatsv1.srvcache_size;
659 					nfsstatsov1.srvclients =
660 					    nfsstatsv1.srvclients;
661 					nfsstatsov1.srvopenowners =
662 					    nfsstatsv1.srvopenowners;
663 					nfsstatsov1.srvopens =
664 					    nfsstatsv1.srvopens;
665 					nfsstatsov1.srvlockowners =
666 					    nfsstatsv1.srvlockowners;
667 					nfsstatsov1.srvlocks =
668 					    nfsstatsv1.srvlocks;
669 					nfsstatsov1.srvdelegates =
670 					    nfsstatsv1.srvdelegates;
671 					for (i = 0; i < NFSV42_CBNOPS; i++)
672 						nfsstatsov1.cbrpccnt[i] =
673 						    nfsstatsv1.cbrpccnt[i];
674 					nfsstatsov1.clopenowners =
675 					    nfsstatsv1.clopenowners;
676 					nfsstatsov1.clopens =
677 					    nfsstatsv1.clopens;
678 					nfsstatsov1.cllockowners =
679 					    nfsstatsv1.cllockowners;
680 					nfsstatsov1.cllocks =
681 					    nfsstatsv1.cllocks;
682 					nfsstatsov1.cldelegates =
683 					    nfsstatsv1.cldelegates;
684 					nfsstatsov1.cllocalopenowners =
685 					    nfsstatsv1.cllocalopenowners;
686 					nfsstatsov1.cllocalopens =
687 					    nfsstatsv1.cllocalopens;
688 					nfsstatsov1.cllocallockowners =
689 					    nfsstatsv1.cllocallockowners;
690 					nfsstatsov1.cllocallocks =
691 					    nfsstatsv1.cllocallocks;
692 					nfsstatsov1.srvstartcnt =
693 					    nfsstatsv1.srvstartcnt;
694 					nfsstatsov1.srvdonecnt =
695 					    nfsstatsv1.srvdonecnt;
696 					for (i = NFSV42_NOPS,
697 					     j = NFSV42_PURENOPS;
698 					     i < NFSV42_NOPS + NFSV4OP_FAKENOPS;
699 					     i++, j++) {
700 						nfsstatsov1.srvbytes[j] =
701 						    nfsstatsv1.srvbytes[i];
702 						nfsstatsov1.srvops[j] =
703 						    nfsstatsv1.srvops[i];
704 						nfsstatsov1.srvduration[j] =
705 						    nfsstatsv1.srvduration[i];
706 					}
707 					nfsstatsov1.busyfrom =
708 					    nfsstatsv1.busyfrom;
709 					nfsstatsov1.busyfrom =
710 					    nfsstatsv1.busyfrom;
711 					error = copyout(&nfsstatsov1, uap->argp,
712 					    sizeof(nfsstatsov1));
713 				} else if (nfsstatver.vers != NFSSTATS_V1)
714 					error = EPERM;
715 				else
716 					error = copyout(&nfsstatsv1, uap->argp,
717 					    sizeof(nfsstatsv1));
718 			}
719 		}
720 		if (error == 0) {
721 			if ((uap->flag & NFSSVC_ZEROCLTSTATS) != 0) {
722 				nfsstatsv1.attrcache_hits = 0;
723 				nfsstatsv1.attrcache_misses = 0;
724 				nfsstatsv1.lookupcache_hits = 0;
725 				nfsstatsv1.lookupcache_misses = 0;
726 				nfsstatsv1.direofcache_hits = 0;
727 				nfsstatsv1.direofcache_misses = 0;
728 				nfsstatsv1.accesscache_hits = 0;
729 				nfsstatsv1.accesscache_misses = 0;
730 				nfsstatsv1.biocache_reads = 0;
731 				nfsstatsv1.read_bios = 0;
732 				nfsstatsv1.read_physios = 0;
733 				nfsstatsv1.biocache_writes = 0;
734 				nfsstatsv1.write_bios = 0;
735 				nfsstatsv1.write_physios = 0;
736 				nfsstatsv1.biocache_readlinks = 0;
737 				nfsstatsv1.readlink_bios = 0;
738 				nfsstatsv1.biocache_readdirs = 0;
739 				nfsstatsv1.readdir_bios = 0;
740 				nfsstatsv1.rpcretries = 0;
741 				nfsstatsv1.rpcrequests = 0;
742 				nfsstatsv1.rpctimeouts = 0;
743 				nfsstatsv1.rpcunexpected = 0;
744 				nfsstatsv1.rpcinvalid = 0;
745 				bzero(nfsstatsv1.rpccnt,
746 				    sizeof(nfsstatsv1.rpccnt));
747 			}
748 			if ((uap->flag & NFSSVC_ZEROSRVSTATS) != 0) {
749 				nfsstatsv1.srvcache_inproghits = 0;
750 				nfsstatsv1.srvcache_nonidemdonehits = 0;
751 				nfsstatsv1.srvcache_misses = 0;
752 				nfsstatsv1.srvcache_tcppeak = 0;
753 				bzero(nfsstatsv1.srvrpccnt,
754 				    sizeof(nfsstatsv1.srvrpccnt));
755 				bzero(nfsstatsv1.cbrpccnt,
756 				    sizeof(nfsstatsv1.cbrpccnt));
757 			}
758 		}
759 		goto out;
760 	} else if (uap->flag & NFSSVC_NFSUSERDPORT) {
761 		u_short sockport;
762 		struct nfsuserd_args nargs;
763 
764 		if ((uap->flag & NFSSVC_NEWSTRUCT) == 0) {
765 			error = copyin(uap->argp, (caddr_t)&sockport,
766 			    sizeof (u_short));
767 			if (error == 0) {
768 				nargs.nuserd_family = AF_INET;
769 				nargs.nuserd_port = sockport;
770 			}
771 		} else {
772 			/*
773 			 * New nfsuserd_args structure, which indicates
774 			 * which IP version to use along with the port#.
775 			 */
776 			error = copyin(uap->argp, &nargs, sizeof(nargs));
777 		}
778 		if (!error)
779 			error = nfsrv_nfsuserdport(&nargs, p);
780 	} else if (uap->flag & NFSSVC_NFSUSERDDELPORT) {
781 		nfsrv_nfsuserddelport();
782 		error = 0;
783 	}
784 
785 out:
786 	NFSEXITCODE(error);
787 	return (error);
788 }
789 
790 /*
791  * called by all three modevent routines, so that it gets things
792  * initialized soon enough.
793  */
794 void
795 newnfs_portinit(void)
796 {
797 	static int inited = 0;
798 
799 	if (inited)
800 		return;
801 	inited = 1;
802 	/* Initialize SMP locks used by both client and server. */
803 	mtx_init(&newnfsd_mtx, "newnfsd_mtx", NULL, MTX_DEF);
804 	mtx_init(&nfs_state_mutex, "nfs_state_mutex", NULL, MTX_DEF);
805 	mtx_init(&nfs_clstate_mutex, "nfs_clstate_mutex", NULL, MTX_DEF);
806 }
807 
808 /*
809  * Determine if the file system supports NFSv4 ACLs.
810  * Return 1 if it does, 0 otherwise.
811  */
812 int
813 nfs_supportsnfsv4acls(struct vnode *vp)
814 {
815 	int error;
816 	long retval;
817 
818 	ASSERT_VOP_LOCKED(vp, "nfs supports nfsv4acls");
819 
820 	if (nfsrv_useacl == 0)
821 		return (0);
822 	error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
823 	if (error == 0 && retval != 0)
824 		return (1);
825 	return (0);
826 }
827 
828 /*
829  * These are the first fields of all the context structures passed into
830  * nfs_pnfsio().
831  */
832 struct pnfsio {
833 	int		done;
834 	int		inprog;
835 	struct task	tsk;
836 };
837 
838 /*
839  * Do a mirror I/O on a pNFS thread.
840  */
841 int
842 nfs_pnfsio(task_fn_t *func, void *context)
843 {
844 	struct pnfsio *pio;
845 	int ret;
846 	static struct taskqueue *pnfsioq = NULL;
847 
848 	pio = (struct pnfsio *)context;
849 	if (pnfsioq == NULL) {
850 		if (nfs_pnfsiothreads == 0)
851 			return (EPERM);
852 		if (nfs_pnfsiothreads < 0)
853 			nfs_pnfsiothreads = mp_ncpus * 4;
854 		pnfsioq = taskqueue_create("pnfsioq", M_WAITOK,
855 		    taskqueue_thread_enqueue, &pnfsioq);
856 		if (pnfsioq == NULL)
857 			return (ENOMEM);
858 		ret = taskqueue_start_threads(&pnfsioq, nfs_pnfsiothreads,
859 		    0, "pnfsiot");
860 		if (ret != 0) {
861 			taskqueue_free(pnfsioq);
862 			pnfsioq = NULL;
863 			return (ret);
864 		}
865 	}
866 	pio->inprog = 1;
867 	TASK_INIT(&pio->tsk, 0, func, context);
868 	ret = taskqueue_enqueue(pnfsioq, &pio->tsk);
869 	if (ret != 0)
870 		pio->inprog = 0;
871 	return (ret);
872 }
873 
874 extern int (*nfsd_call_nfscommon)(struct thread *, struct nfssvc_args *);
875 
876 /*
877  * Called once to initialize data structures...
878  */
879 static int
880 nfscommon_modevent(module_t mod, int type, void *data)
881 {
882 	int error = 0;
883 	static int loaded = 0;
884 
885 	switch (type) {
886 	case MOD_LOAD:
887 		if (loaded)
888 			goto out;
889 		newnfs_portinit();
890 		mtx_init(&nfs_nameid_mutex, "nfs_nameid_mutex", NULL, MTX_DEF);
891 		mtx_init(&nfs_sockl_mutex, "nfs_sockl_mutex", NULL, MTX_DEF);
892 		mtx_init(&nfs_slock_mutex, "nfs_slock_mutex", NULL, MTX_DEF);
893 		mtx_init(&nfs_req_mutex, "nfs_req_mutex", NULL, MTX_DEF);
894 		mtx_init(&nfsrv_nfsuserdsock.nr_mtx, "nfsuserd", NULL,
895 		    MTX_DEF);
896 		mtx_init(&nfsrv_dslock_mtx, "nfs4ds", NULL, MTX_DEF);
897 		TAILQ_INIT(&nfsrv_devidhead);
898 		callout_init(&newnfsd_callout, 1);
899 		newnfs_init();
900 		nfsd_call_nfscommon = nfssvc_nfscommon;
901 		loaded = 1;
902 		break;
903 
904 	case MOD_UNLOAD:
905 		if (newnfs_numnfsd != 0 || nfsrv_nfsuserd != NOTRUNNING ||
906 		    nfs_numnfscbd != 0) {
907 			error = EBUSY;
908 			break;
909 		}
910 
911 		nfsd_call_nfscommon = NULL;
912 		callout_drain(&newnfsd_callout);
913 		/* Clean out the name<-->id cache. */
914 		nfsrv_cleanusergroup();
915 		/* and get rid of the mutexes */
916 		mtx_destroy(&nfs_nameid_mutex);
917 		mtx_destroy(&newnfsd_mtx);
918 		mtx_destroy(&nfs_state_mutex);
919 		mtx_destroy(&nfs_clstate_mutex);
920 		mtx_destroy(&nfs_sockl_mutex);
921 		mtx_destroy(&nfs_slock_mutex);
922 		mtx_destroy(&nfs_req_mutex);
923 		mtx_destroy(&nfsrv_nfsuserdsock.nr_mtx);
924 		mtx_destroy(&nfsrv_dslock_mtx);
925 		loaded = 0;
926 		break;
927 	default:
928 		error = EOPNOTSUPP;
929 		break;
930 	}
931 
932 out:
933 	NFSEXITCODE(error);
934 	return error;
935 }
936 static moduledata_t nfscommon_mod = {
937 	"nfscommon",
938 	nfscommon_modevent,
939 	NULL,
940 };
941 DECLARE_MODULE(nfscommon, nfscommon_mod, SI_SUB_VFS, SI_ORDER_ANY);
942 
943 /* So that loader and kldload(2) can find us, wherever we are.. */
944 MODULE_VERSION(nfscommon, 1);
945 MODULE_DEPEND(nfscommon, nfssvc, 1, 1, 1);
946 MODULE_DEPEND(nfscommon, krpc, 1, 1, 1);
947