]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - sys/fs/nfsserver/nfs_nfsdkrpc.c
Merge ^/head r351732 through r352104.
[FreeBSD/FreeBSD.git] / sys / fs / nfsserver / nfs_nfsdkrpc.c
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 #include "opt_inet6.h"
40 #include "opt_kgssapi.h"
41
42 #include <fs/nfs/nfsport.h>
43
44 #include <rpc/rpc.h>
45 #include <rpc/rpcsec_gss.h>
46
47 #include <nfs/nfs_fha.h>
48 #include <fs/nfsserver/nfs_fha_new.h>
49
50 #include <security/mac/mac_framework.h>
51
52 NFSDLOCKMUTEX;
53 NFSV4ROOTLOCKMUTEX;
54 struct nfsv4lock nfsd_suspend_lock;
55 char *nfsrv_zeropnfsdat = NULL;
56
57 /*
58  * Mapping of old NFS Version 2 RPC numbers to generic numbers.
59  */
60 int newnfs_nfsv3_procid[NFS_V3NPROCS] = {
61         NFSPROC_NULL,
62         NFSPROC_GETATTR,
63         NFSPROC_SETATTR,
64         NFSPROC_NOOP,
65         NFSPROC_LOOKUP,
66         NFSPROC_READLINK,
67         NFSPROC_READ,
68         NFSPROC_NOOP,
69         NFSPROC_WRITE,
70         NFSPROC_CREATE,
71         NFSPROC_REMOVE,
72         NFSPROC_RENAME,
73         NFSPROC_LINK,
74         NFSPROC_SYMLINK,
75         NFSPROC_MKDIR,
76         NFSPROC_RMDIR,
77         NFSPROC_READDIR,
78         NFSPROC_FSSTAT,
79         NFSPROC_NOOP,
80         NFSPROC_NOOP,
81         NFSPROC_NOOP,
82         NFSPROC_NOOP,
83 };
84
85
86 SYSCTL_DECL(_vfs_nfsd);
87
88 SVCPOOL         *nfsrvd_pool;
89
90 static int      nfs_privport = 0;
91 SYSCTL_INT(_vfs_nfsd, OID_AUTO, nfs_privport, CTLFLAG_RWTUN,
92     &nfs_privport, 0,
93     "Only allow clients using a privileged port for NFSv2, 3 and 4");
94
95 static int      nfs_minvers = NFS_VER2;
96 SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_min_nfsvers, CTLFLAG_RWTUN,
97     &nfs_minvers, 0, "The lowest version of NFS handled by the server");
98
99 static int      nfs_maxvers = NFS_VER4;
100 SYSCTL_INT(_vfs_nfsd, OID_AUTO, server_max_nfsvers, CTLFLAG_RWTUN,
101     &nfs_maxvers, 0, "The highest version of NFS handled by the server");
102
103 static int nfs_proc(struct nfsrv_descript *, u_int32_t, SVCXPRT *xprt,
104     struct nfsrvcache **);
105
106 extern u_long sb_max_adj;
107 extern int newnfs_numnfsd;
108 extern struct proc *nfsd_master_proc;
109 extern time_t nfsdev_time;
110 extern int nfsrv_writerpc[NFS_NPROCS];
111 extern volatile int nfsrv_devidcnt;
112 extern struct nfsv4_opflag nfsv4_opflag[NFSV41_NOPS];
113
114 /*
115  * NFS server system calls
116  */
117
118 static void
119 nfssvc_program(struct svc_req *rqst, SVCXPRT *xprt)
120 {
121         struct nfsrv_descript nd;
122         struct nfsrvcache *rp = NULL;
123         int cacherep, credflavor;
124
125         memset(&nd, 0, sizeof(nd));
126         if (rqst->rq_vers == NFS_VER2) {
127                 if (rqst->rq_proc > NFSV2PROC_STATFS ||
128                     newnfs_nfsv3_procid[rqst->rq_proc] == NFSPROC_NOOP) {
129                         svcerr_noproc(rqst);
130                         svc_freereq(rqst);
131                         goto out;
132                 }
133                 nd.nd_procnum = newnfs_nfsv3_procid[rqst->rq_proc];
134                 nd.nd_flag = ND_NFSV2;
135         } else if (rqst->rq_vers == NFS_VER3) {
136                 if (rqst->rq_proc >= NFS_V3NPROCS) {
137                         svcerr_noproc(rqst);
138                         svc_freereq(rqst);
139                         goto out;
140                 }
141                 nd.nd_procnum = rqst->rq_proc;
142                 nd.nd_flag = ND_NFSV3;
143         } else {
144                 if (rqst->rq_proc != NFSPROC_NULL &&
145                     rqst->rq_proc != NFSV4PROC_COMPOUND) {
146                         svcerr_noproc(rqst);
147                         svc_freereq(rqst);
148                         goto out;
149                 }
150                 nd.nd_procnum = rqst->rq_proc;
151                 nd.nd_flag = ND_NFSV4;
152         }
153
154         /*
155          * Note: we want rq_addr, not svc_getrpccaller for nd_nam2 -
156          * NFS_SRVMAXDATA uses a NULL value for nd_nam2 to detect TCP
157          * mounts.
158          */
159         nd.nd_mrep = rqst->rq_args;
160         rqst->rq_args = NULL;
161         newnfs_realign(&nd.nd_mrep, M_WAITOK);
162         nd.nd_md = nd.nd_mrep;
163         nd.nd_dpos = mtod(nd.nd_md, caddr_t);
164         nd.nd_nam = svc_getrpccaller(rqst);
165         nd.nd_nam2 = rqst->rq_addr;
166         nd.nd_mreq = NULL;
167         nd.nd_cred = NULL;
168
169         if (nfs_privport != 0) {
170                 /* Check if source port is privileged */
171                 u_short port;
172                 struct sockaddr *nam = nd.nd_nam;
173                 struct sockaddr_in *sin;
174
175                 sin = (struct sockaddr_in *)nam;
176                 /*
177                  * INET/INET6 - same code:
178                  *    sin_port and sin6_port are at same offset
179                  */
180                 port = ntohs(sin->sin_port);
181                 if (port >= IPPORT_RESERVED &&
182                     nd.nd_procnum != NFSPROC_NULL) {
183 #ifdef INET6
184                         char buf[INET6_ADDRSTRLEN];
185 #else
186                         char buf[INET_ADDRSTRLEN];
187 #endif
188 #ifdef INET6
189 #if defined(KLD_MODULE)
190                         /* Do not use ip6_sprintf: the nfs module should work without INET6. */
191 #define ip6_sprintf(buf, a)                                             \
192                         (sprintf((buf), "%x:%x:%x:%x:%x:%x:%x:%x",      \
193                             (a)->s6_addr16[0], (a)->s6_addr16[1],       \
194                             (a)->s6_addr16[2], (a)->s6_addr16[3],       \
195                             (a)->s6_addr16[4], (a)->s6_addr16[5],       \
196                             (a)->s6_addr16[6], (a)->s6_addr16[7]),      \
197                             (buf))
198 #endif
199 #endif
200                         printf("NFS request from unprivileged port (%s:%d)\n",
201 #ifdef INET6
202                             sin->sin_family == AF_INET6 ?
203                             ip6_sprintf(buf, &satosin6(sin)->sin6_addr) :
204 #if defined(KLD_MODULE)
205 #undef ip6_sprintf
206 #endif
207 #endif
208                             inet_ntoa_r(sin->sin_addr, buf), port);
209                         svcerr_weakauth(rqst);
210                         svc_freereq(rqst);
211                         m_freem(nd.nd_mrep);
212                         goto out;
213                 }
214         }
215
216         if (nd.nd_procnum != NFSPROC_NULL) {
217                 if (!svc_getcred(rqst, &nd.nd_cred, &credflavor)) {
218                         svcerr_weakauth(rqst);
219                         svc_freereq(rqst);
220                         m_freem(nd.nd_mrep);
221                         goto out;
222                 }
223
224                 /* Set the flag based on credflavor */
225                 if (credflavor == RPCSEC_GSS_KRB5) {
226                         nd.nd_flag |= ND_GSS;
227                 } else if (credflavor == RPCSEC_GSS_KRB5I) {
228                         nd.nd_flag |= (ND_GSS | ND_GSSINTEGRITY);
229                 } else if (credflavor == RPCSEC_GSS_KRB5P) {
230                         nd.nd_flag |= (ND_GSS | ND_GSSPRIVACY);
231                 } else if (credflavor != AUTH_SYS) {
232                         svcerr_weakauth(rqst);
233                         svc_freereq(rqst);
234                         m_freem(nd.nd_mrep);
235                         goto out;
236                 }
237
238 #ifdef MAC
239                 mac_cred_associate_nfsd(nd.nd_cred);
240 #endif
241                 /*
242                  * Get a refcnt (shared lock) on nfsd_suspend_lock.
243                  * NFSSVC_SUSPENDNFSD will take an exclusive lock on
244                  * nfsd_suspend_lock to suspend these threads.
245                  * The call to nfsv4_lock() that precedes nfsv4_getref()
246                  * ensures that the acquisition of the exclusive lock
247                  * takes priority over acquisition of the shared lock by
248                  * waiting for any exclusive lock request to complete.
249                  * This must be done here, before the check of
250                  * nfsv4root exports by nfsvno_v4rootexport().
251                  */
252                 NFSLOCKV4ROOTMUTEX();
253                 nfsv4_lock(&nfsd_suspend_lock, 0, NULL, NFSV4ROOTLOCKMUTEXPTR,
254                     NULL);
255                 nfsv4_getref(&nfsd_suspend_lock, NULL, NFSV4ROOTLOCKMUTEXPTR,
256                     NULL);
257                 NFSUNLOCKV4ROOTMUTEX();
258
259                 if ((nd.nd_flag & ND_NFSV4) != 0) {
260                         nd.nd_repstat = nfsvno_v4rootexport(&nd);
261                         if (nd.nd_repstat != 0) {
262                                 NFSLOCKV4ROOTMUTEX();
263                                 nfsv4_relref(&nfsd_suspend_lock);
264                                 NFSUNLOCKV4ROOTMUTEX();
265                                 svcerr_weakauth(rqst);
266                                 svc_freereq(rqst);
267                                 m_freem(nd.nd_mrep);
268                                 goto out;
269                         }
270                 }
271
272                 cacherep = nfs_proc(&nd, rqst->rq_xid, xprt, &rp);
273                 NFSLOCKV4ROOTMUTEX();
274                 nfsv4_relref(&nfsd_suspend_lock);
275                 NFSUNLOCKV4ROOTMUTEX();
276         } else {
277                 NFSMGET(nd.nd_mreq);
278                 nd.nd_mreq->m_len = 0;
279                 cacherep = RC_REPLY;
280         }
281         if (nd.nd_mrep != NULL)
282                 m_freem(nd.nd_mrep);
283
284         if (nd.nd_cred != NULL)
285                 crfree(nd.nd_cred);
286
287         if (cacherep == RC_DROPIT) {
288                 if (nd.nd_mreq != NULL)
289                         m_freem(nd.nd_mreq);
290                 svc_freereq(rqst);
291                 goto out;
292         }
293
294         if (nd.nd_mreq == NULL) {
295                 svcerr_decode(rqst);
296                 svc_freereq(rqst);
297                 goto out;
298         }
299
300         if (nd.nd_repstat & NFSERR_AUTHERR) {
301                 svcerr_auth(rqst, nd.nd_repstat & ~NFSERR_AUTHERR);
302                 if (nd.nd_mreq != NULL)
303                         m_freem(nd.nd_mreq);
304         } else if (!svc_sendreply_mbuf(rqst, nd.nd_mreq)) {
305                 svcerr_systemerr(rqst);
306         }
307         if (rp != NULL) {
308                 nfsrvd_sentcache(rp, (rqst->rq_reply_seq != 0 ||
309                     SVC_ACK(xprt, NULL)), rqst->rq_reply_seq);
310         }
311         svc_freereq(rqst);
312
313 out:
314         td_softdep_cleanup(curthread);
315         NFSEXITCODE(0);
316 }
317
318 /*
319  * Check the cache and, optionally, do the RPC.
320  * Return the appropriate cache response.
321  */
322 static int
323 nfs_proc(struct nfsrv_descript *nd, u_int32_t xid, SVCXPRT *xprt,
324     struct nfsrvcache **rpp)
325 {
326         int cacherep = RC_DOIT, isdgram, taglen = -1;
327         struct mbuf *m;
328         u_char tag[NFSV4_SMALLSTR + 1], *tagstr = NULL;
329         u_int32_t minorvers = 0;
330         uint32_t ack;
331
332         *rpp = NULL;
333         if (nd->nd_nam2 == NULL) {
334                 nd->nd_flag |= ND_STREAMSOCK;
335                 isdgram = 0;
336         } else {
337                 isdgram = 1;
338         }
339
340         /*
341          * Two cases:
342          * 1 - For NFSv2 over UDP, if we are near our malloc/mget
343          *     limit, just drop the request. There is no
344          *     NFSERR_RESOURCE or NFSERR_DELAY for NFSv2 and the
345          *     client will timeout/retry over UDP in a little while.
346          * 2 - nd_repstat == 0 && nd_mreq == NULL, which
347          *     means a normal nfs rpc, so check the cache
348          */
349         if ((nd->nd_flag & ND_NFSV2) && nd->nd_nam2 != NULL &&
350             nfsrv_mallocmget_limit()) {
351                 cacherep = RC_DROPIT;
352         } else {
353                 /*
354                  * For NFSv3, play it safe and assume that the client is
355                  * doing retries on the same TCP connection.
356                  */
357                 if ((nd->nd_flag & (ND_NFSV4 | ND_STREAMSOCK)) ==
358                     ND_STREAMSOCK)
359                         nd->nd_flag |= ND_SAMETCPCONN;
360                 nd->nd_retxid = xid;
361                 nd->nd_tcpconntime = NFSD_MONOSEC;
362                 nd->nd_sockref = xprt->xp_sockref;
363                 if ((nd->nd_flag & ND_NFSV4) != 0)
364                         nfsd_getminorvers(nd, tag, &tagstr, &taglen,
365                             &minorvers);
366                 if ((nd->nd_flag & ND_NFSV41) != 0)
367                         /* NFSv4.1 caches replies in the session slots. */
368                         cacherep = RC_DOIT;
369                 else {
370                         cacherep = nfsrvd_getcache(nd);
371                         ack = 0;
372                         SVC_ACK(xprt, &ack);
373                         nfsrc_trimcache(xprt->xp_sockref, ack, 0);
374                 }
375         }
376
377         /*
378          * Handle the request. There are three cases.
379          * RC_DOIT - do the RPC
380          * RC_REPLY - return the reply already created
381          * RC_DROPIT - just throw the request away
382          */
383         if (cacherep == RC_DOIT) {
384                 if ((nd->nd_flag & ND_NFSV41) != 0)
385                         nd->nd_xprt = xprt;
386                 nfsrvd_dorpc(nd, isdgram, tagstr, taglen, minorvers);
387                 if ((nd->nd_flag & ND_NFSV41) != 0) {
388                         if (nd->nd_repstat != NFSERR_REPLYFROMCACHE &&
389                             (nd->nd_flag & ND_SAVEREPLY) != 0) {
390                                 /* Cache a copy of the reply. */
391                                 m = m_copym(nd->nd_mreq, 0, M_COPYALL,
392                                     M_WAITOK);
393                         } else
394                                 m = NULL;
395                         if ((nd->nd_flag & ND_HASSEQUENCE) != 0)
396                                 nfsrv_cache_session(nd->nd_sessionid,
397                                     nd->nd_slotid, nd->nd_repstat, &m);
398                         if (nd->nd_repstat == NFSERR_REPLYFROMCACHE)
399                                 nd->nd_repstat = 0;
400                         cacherep = RC_REPLY;
401                 } else {
402                         if (nd->nd_repstat == NFSERR_DONTREPLY)
403                                 cacherep = RC_DROPIT;
404                         else
405                                 cacherep = RC_REPLY;
406                         *rpp = nfsrvd_updatecache(nd);
407                 }
408         }
409         if (tagstr != NULL && taglen > NFSV4_SMALLSTR)
410                 free(tagstr, M_TEMP);
411
412         NFSEXITCODE2(0, nd);
413         return (cacherep);
414 }
415
416 static void
417 nfssvc_loss(SVCXPRT *xprt)
418 {
419         uint32_t ack;
420
421         ack = 0;
422         SVC_ACK(xprt, &ack);
423         nfsrc_trimcache(xprt->xp_sockref, ack, 1);
424 }
425
426 /*
427  * Adds a socket to the list for servicing by nfsds.
428  */
429 int
430 nfsrvd_addsock(struct file *fp)
431 {
432         int siz;
433         struct socket *so;
434         int error = 0;
435         SVCXPRT *xprt;
436         static u_int64_t sockref = 0;
437
438         so = fp->f_data;
439
440         siz = sb_max_adj;
441         error = soreserve(so, siz, siz);
442         if (error)
443                 goto out;
444
445         /*
446          * Steal the socket from userland so that it doesn't close
447          * unexpectedly.
448          */
449         if (so->so_type == SOCK_DGRAM)
450                 xprt = svc_dg_create(nfsrvd_pool, so, 0, 0);
451         else
452                 xprt = svc_vc_create(nfsrvd_pool, so, 0, 0);
453         if (xprt) {
454                 fp->f_ops = &badfileops;
455                 fp->f_data = NULL;
456                 xprt->xp_sockref = ++sockref;
457                 if (nfs_minvers == NFS_VER2)
458                         svc_reg(xprt, NFS_PROG, NFS_VER2, nfssvc_program,
459                             NULL);
460                 if (nfs_minvers <= NFS_VER3 && nfs_maxvers >= NFS_VER3)
461                         svc_reg(xprt, NFS_PROG, NFS_VER3, nfssvc_program,
462                             NULL);
463                 if (nfs_maxvers >= NFS_VER4)
464                         svc_reg(xprt, NFS_PROG, NFS_VER4, nfssvc_program,
465                             NULL);
466                 if (so->so_type == SOCK_STREAM)
467                         svc_loss_reg(xprt, nfssvc_loss);
468                 SVC_RELEASE(xprt);
469         }
470
471 out:
472         NFSEXITCODE(error);
473         return (error);
474 }
475
476 /*
477  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
478  * until it is killed by a signal.
479  */
480 int
481 nfsrvd_nfsd(struct thread *td, struct nfsd_nfsd_args *args)
482 {
483         char principal[MAXHOSTNAMELEN + 5];
484         struct proc *p;
485         int error = 0;
486         bool_t ret2, ret3, ret4;
487
488         error = copyinstr(args->principal, principal, sizeof (principal),
489             NULL);
490         if (error)
491                 goto out;
492
493         /*
494          * Only the first nfsd actually does any work. The RPC code
495          * adds threads to it as needed. Any extra processes offered
496          * by nfsd just exit. If nfsd is new enough, it will call us
497          * once with a structure that specifies how many threads to
498          * use.
499          */
500         NFSD_LOCK();
501         if (newnfs_numnfsd == 0) {
502                 nfsdev_time = time_second;
503                 p = td->td_proc;
504                 PROC_LOCK(p);
505                 p->p_flag2 |= P2_AST_SU;
506                 PROC_UNLOCK(p);
507                 newnfs_numnfsd++;
508
509                 NFSD_UNLOCK();
510                 error = nfsrv_createdevids(args, td);
511                 if (error == 0) {
512                         /* An empty string implies AUTH_SYS only. */
513                         if (principal[0] != '\0') {
514                                 ret2 = rpc_gss_set_svc_name_call(principal,
515                                     "kerberosv5", GSS_C_INDEFINITE, NFS_PROG,
516                                     NFS_VER2);
517                                 ret3 = rpc_gss_set_svc_name_call(principal,
518                                     "kerberosv5", GSS_C_INDEFINITE, NFS_PROG,
519                                     NFS_VER3);
520                                 ret4 = rpc_gss_set_svc_name_call(principal,
521                                     "kerberosv5", GSS_C_INDEFINITE, NFS_PROG,
522                                     NFS_VER4);
523         
524                                 if (!ret2 || !ret3 || !ret4)
525                                         printf(
526                                             "nfsd: can't register svc name\n");
527                         }
528         
529                         nfsrvd_pool->sp_minthreads = args->minthreads;
530                         nfsrvd_pool->sp_maxthreads = args->maxthreads;
531                                 
532                         /*
533                          * If this is a pNFS service, make Getattr do a
534                          * vn_start_write(), so it can do a vn_set_extattr().
535                          */
536                         if (nfsrv_devidcnt > 0) {
537                                 nfsrv_writerpc[NFSPROC_GETATTR] = 1;
538                                 nfsv4_opflag[NFSV4OP_GETATTR].modifyfs = 1;
539                         }
540
541                         svc_run(nfsrvd_pool);
542         
543                         /* Reset Getattr to not do a vn_start_write(). */
544                         nfsrv_writerpc[NFSPROC_GETATTR] = 0;
545                         nfsv4_opflag[NFSV4OP_GETATTR].modifyfs = 0;
546
547                         if (principal[0] != '\0') {
548                                 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER2);
549                                 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER3);
550                                 rpc_gss_clear_svc_name_call(NFS_PROG, NFS_VER4);
551                         }
552                 }
553                 NFSD_LOCK();
554                 newnfs_numnfsd--;
555                 nfsrvd_init(1);
556                 PROC_LOCK(p);
557                 p->p_flag2 &= ~P2_AST_SU;
558                 PROC_UNLOCK(p);
559         }
560         NFSD_UNLOCK();
561
562 out:
563         NFSEXITCODE(error);
564         return (error);
565 }
566
567 /*
568  * Initialize the data structures for the server.
569  * Handshake with any new nfsds starting up to avoid any chance of
570  * corruption.
571  */
572 void
573 nfsrvd_init(int terminating)
574 {
575
576         NFSD_LOCK_ASSERT();
577
578         if (terminating) {
579                 nfsd_master_proc = NULL;
580                 NFSD_UNLOCK();
581                 nfsrv_freealllayoutsanddevids();
582                 nfsrv_freeallbackchannel_xprts();
583                 svcpool_close(nfsrvd_pool);
584                 free(nfsrv_zeropnfsdat, M_TEMP);
585                 nfsrv_zeropnfsdat = NULL;
586                 NFSD_LOCK();
587         } else {
588                 NFSD_UNLOCK();
589                 nfsrvd_pool = svcpool_create("nfsd",
590                     SYSCTL_STATIC_CHILDREN(_vfs_nfsd));
591                 nfsrvd_pool->sp_rcache = NULL;
592                 nfsrvd_pool->sp_assign = fhanew_assign;
593                 nfsrvd_pool->sp_done = fha_nd_complete;
594                 NFSD_LOCK();
595         }
596 }
597