Register keyword removal
[dragonfly.git] / sys / vfs / nfs / nfs_syscalls.c
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  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *      This product includes software developed by the University of
19  *      California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  *
36  *      @(#)nfs_syscalls.c      8.5 (Berkeley) 3/30/95
37  * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $
38  * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.7 2003/07/26 21:48:49 rob Exp $
39  */
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/sysproto.h>
44 #include <sys/kernel.h>
45 #include <sys/sysctl.h>
46 #include <sys/file.h>
47 #include <sys/filedesc.h>
48 #include <sys/vnode.h>
49 #include <sys/malloc.h>
50 #include <sys/mount.h>
51 #include <sys/proc.h>
52 #include <sys/buf.h>
53 #include <sys/mbuf.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/domain.h>
57 #include <sys/protosw.h>
58 #include <sys/namei.h>
59 #include <vm/vm_zone.h>
60
61 #include <netinet/in.h>
62 #include <netinet/tcp.h>
63 #include <nfs/xdr_subs.h>
64 #include <nfs/rpcv2.h>
65 #include <nfs/nfsproto.h>
66 #include <nfs/nfs.h>
67 #include <nfs/nfsm_subs.h>
68 #include <nfs/nfsrvcache.h>
69 #include <nfs/nfsmount.h>
70 #include <nfs/nfsnode.h>
71 #include <nfs/nqnfs.h>
72 #include <nfs/nfsrtt.h>
73
74 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
75
76 /* Global defs. */
77 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *nd,
78                                             struct nfssvc_sock *slp,
79                                             struct thread *td,
80                                             struct mbuf **mreqp));
81 extern int nfs_numasync;
82 extern time_t nqnfsstarttime;
83 extern int nqsrv_writeslack;
84 extern int nfsrtton;
85 extern struct nfsstats nfsstats;
86 extern int nfsrvw_procrastinate;
87 extern int nfsrvw_procrastinate_v3;
88 static int nuidhash_max = NFS_MAXUIDHASH;
89
90 #ifndef NFS_NOSERVER
91 static void     nfsrv_zapsock __P((struct nfssvc_sock *slp));
92 #endif
93 static int      nfssvc_iod __P((struct thread *));
94
95 #define TRUE    1
96 #define FALSE   0
97
98 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
99
100 SYSCTL_DECL(_vfs_nfs);
101
102 #ifndef NFS_NOSERVER
103 int nfsd_waiting = 0;
104 static struct nfsdrt nfsdrt;
105 static int nfs_numnfsd = 0;
106 static int notstarted = 1;
107 static int modify_flag = 0;
108 static void     nfsd_rt __P((int sotype, struct nfsrv_descript *nd,
109                              int cacherep));
110 static int      nfssvc_addsock __P((struct file *, struct sockaddr *,
111                                     struct thread *));
112 static int      nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t,struct thread *));
113
114 static int nfs_privport = 0;
115 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
116 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
117 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
118
119 /*
120  * NFS server system calls
121  */
122
123 #endif /* NFS_NOSERVER */
124 /*
125  * nfssvc_args(int flag, caddr_t argp)
126  *
127  * Nfs server psuedo system call for the nfsd's
128  * Based on the flag value it either:
129  * - adds a socket to the selection list
130  * - remains in the kernel as an nfsd
131  * - remains in the kernel as an nfsiod
132  */
133 int
134 nfssvc(struct nfssvc_args *uap)
135 {
136 #ifndef NFS_NOSERVER
137         struct nameidata nd;
138         struct file *fp;
139         struct sockaddr *nam;
140         struct nfsd_args nfsdarg;
141         struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
142         struct nfsd_cargs ncd;
143         struct nfsd *nfsd;
144         struct nfssvc_sock *slp;
145         struct nfsuid *nuidp;
146         struct nfsmount *nmp;
147 #endif /* NFS_NOSERVER */
148         int error;
149         struct thread *td = curthread;
150
151         /*
152          * Must be super user
153          */
154         error = suser(td);
155         if(error)
156                 return (error);
157         KKASSERT(td->td_proc);  /* for ucred and p_fd */
158         while (nfssvc_sockhead_flag & SLP_INIT) {
159                  nfssvc_sockhead_flag |= SLP_WANTINIT;
160                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
161         }
162         if (uap->flag & NFSSVC_BIOD)
163                 error = nfssvc_iod(td);
164 #ifdef NFS_NOSERVER
165         else
166                 error = ENXIO;
167 #else /* !NFS_NOSERVER */
168         else if (uap->flag & NFSSVC_MNTD) {
169                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
170                 if (error)
171                         return (error);
172                 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
173                         ncd.ncd_dirp, td);
174                 error = namei(&nd);
175                 if (error)
176                         return (error);
177                 NDFREE(&nd, NDF_ONLY_PNBUF);
178                 if ((nd.ni_vp->v_flag & VROOT) == 0)
179                         error = EINVAL;
180                 nmp = VFSTONFS(nd.ni_vp->v_mount);
181                 vput(nd.ni_vp);
182                 if (error)
183                         return (error);
184                 if ((nmp->nm_state & NFSSTA_MNTD) &&
185                         (uap->flag & NFSSVC_GOTAUTH) == 0)
186                         return (0);
187                 nmp->nm_state |= NFSSTA_MNTD;
188                 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
189                         uap->argp, td);
190         } else if (uap->flag & NFSSVC_ADDSOCK) {
191                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
192                 if (error)
193                         return (error);
194                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
195                 if (error)
196                         return (error);
197                 /*
198                  * Get the client address for connected sockets.
199                  */
200                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
201                         nam = (struct sockaddr *)0;
202                 else {
203                         error = getsockaddr(&nam, nfsdarg.name,
204                                             nfsdarg.namelen);
205                         if (error) {
206                                 fdrop(fp, td);
207                                 return (error);
208                         }
209                 }
210                 error = nfssvc_addsock(fp, nam, td);
211                 fdrop(fp, td);
212         } else {
213                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
214                 if (error)
215                         return (error);
216                 if ((uap->flag & NFSSVC_AUTHIN) &&
217                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
218                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
219                         slp = nfsd->nfsd_slp;
220
221                         /*
222                          * First check to see if another nfsd has already
223                          * added this credential.
224                          */
225                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
226                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
227                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
228                                     (!nfsd->nfsd_nd->nd_nam2 ||
229                                      netaddr_match(NU_NETFAM(nuidp),
230                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
231                                         break;
232                         }
233                         if (nuidp) {
234                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
235                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
236                         } else {
237                             /*
238                              * Nope, so we will.
239                              */
240                             if (slp->ns_numuids < nuidhash_max) {
241                                 slp->ns_numuids++;
242                                 nuidp = (struct nfsuid *)
243                                    malloc(sizeof (struct nfsuid), M_NFSUID,
244                                         M_WAITOK);
245                             } else
246                                 nuidp = (struct nfsuid *)0;
247                             if ((slp->ns_flag & SLP_VALID) == 0) {
248                                 if (nuidp)
249                                     free((caddr_t)nuidp, M_NFSUID);
250                             } else {
251                                 if (nuidp == (struct nfsuid *)0) {
252                                     nuidp = slp->ns_uidlruhead.tqh_first;
253                                     LIST_REMOVE(nuidp, nu_hash);
254                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
255                                         nu_lru);
256                                     if (nuidp->nu_flag & NU_NAM)
257                                         FREE(nuidp->nu_nam, M_SONAME);
258                                 }
259                                 nuidp->nu_flag = 0;
260                                 nuidp->nu_cr = nsd->nsd_cr;
261                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
262                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
263                                 nuidp->nu_cr.cr_ref = 1;
264                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
265                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
266                                 /*
267                                  * and save the session key in nu_key.
268                                  */
269                                 bcopy(nsd->nsd_key, nuidp->nu_key,
270                                     sizeof (nsd->nsd_key));
271                                 if (nfsd->nfsd_nd->nd_nam2) {
272                                     struct sockaddr_in *saddr;
273
274                                     saddr = (struct sockaddr_in *)
275                                             nfsd->nfsd_nd->nd_nam2;
276                                     switch (saddr->sin_family) {
277                                     case AF_INET:
278                                         nuidp->nu_flag |= NU_INETADDR;
279                                         nuidp->nu_inetaddr =
280                                              saddr->sin_addr.s_addr;
281                                         break;
282                                     case AF_ISO:
283                                     default:
284                                         nuidp->nu_flag |= NU_NAM;
285                                         nuidp->nu_nam = 
286                                                 dup_sockaddr(nfsd->nfsd_nd->
287                                                              nd_nam2, 1);
288                                         break;
289                                     };
290                                 }
291                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
292                                         nu_lru);
293                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
294                                         nuidp, nu_hash);
295                                 nfsrv_setcred(&nuidp->nu_cr,
296                                     &nfsd->nfsd_nd->nd_cr);
297                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
298                             }
299                         }
300                 }
301                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
302                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
303                 error = nfssvc_nfsd(nsd, uap->argp, td);
304         }
305 #endif /* NFS_NOSERVER */
306         if (error == EINTR || error == ERESTART)
307                 error = 0;
308         return (error);
309 }
310
311 #ifndef NFS_NOSERVER
312 /*
313  * Adds a socket to the list for servicing by nfsds.
314  */
315 static int
316 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
317 {
318         int siz;
319         struct nfssvc_sock *slp;
320         struct socket *so;
321         int error, s;
322
323         so = (struct socket *)fp->f_data;
324 #if 0
325         tslp = (struct nfssvc_sock *)0;
326         /*
327          * Add it to the list, as required.
328          */
329         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
330                 tslp = nfs_udpsock;
331                 if (tslp->ns_flag & SLP_VALID) {
332                         if (mynam != NULL)
333                                 FREE(mynam, M_SONAME);
334                         return (EPERM);
335                 }
336         }
337 #endif
338         if (so->so_type == SOCK_STREAM)
339                 siz = NFS_MAXPACKET + sizeof (u_long);
340         else
341                 siz = NFS_MAXPACKET;
342         error = soreserve(so, siz, siz);
343         if (error) {
344                 if (mynam != NULL)
345                         FREE(mynam, M_SONAME);
346                 return (error);
347         }
348
349         /*
350          * Set protocol specific options { for now TCP only } and
351          * reserve some space. For datagram sockets, this can get called
352          * repeatedly for the same socket, but that isn't harmful.
353          */
354         if (so->so_type == SOCK_STREAM) {
355                 struct sockopt sopt;
356                 int val;
357
358                 bzero(&sopt, sizeof sopt);
359                 sopt.sopt_level = SOL_SOCKET;
360                 sopt.sopt_name = SO_KEEPALIVE;
361                 sopt.sopt_val = &val;
362                 sopt.sopt_valsize = sizeof val;
363                 val = 1;
364                 sosetopt(so, &sopt);
365         }
366         if (so->so_proto->pr_domain->dom_family == AF_INET &&
367             so->so_proto->pr_protocol == IPPROTO_TCP) {
368                 struct sockopt sopt;
369                 int val;
370
371                 bzero(&sopt, sizeof sopt);
372                 sopt.sopt_level = IPPROTO_TCP;
373                 sopt.sopt_name = TCP_NODELAY;
374                 sopt.sopt_val = &val;
375                 sopt.sopt_valsize = sizeof val;
376                 val = 1;
377                 sosetopt(so, &sopt);
378         }
379         so->so_rcv.sb_flags &= ~SB_NOINTR;
380         so->so_rcv.sb_timeo = 0;
381         so->so_snd.sb_flags &= ~SB_NOINTR;
382         so->so_snd.sb_timeo = 0;
383
384         slp = (struct nfssvc_sock *)
385                 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
386         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
387         STAILQ_INIT(&slp->ns_rec);
388         TAILQ_INIT(&slp->ns_uidlruhead);
389         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
390
391         slp->ns_so = so;
392         slp->ns_nam = mynam;
393         fp->f_count++;
394         slp->ns_fp = fp;
395         s = splnet();
396         so->so_upcallarg = (caddr_t)slp;
397         so->so_upcall = nfsrv_rcv;
398         so->so_rcv.sb_flags |= SB_UPCALL;
399         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
400         nfsrv_wakenfsd(slp);
401         splx(s);
402         return (0);
403 }
404
405 /*
406  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
407  * until it is killed by a signal.
408  */
409 static int
410 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
411 {
412         int siz;
413         struct nfssvc_sock *slp;
414         struct nfsd *nfsd = nsd->nsd_nfsd;
415         struct nfsrv_descript *nd = NULL;
416         struct mbuf *m, *mreq;
417         int error = 0, cacherep, s, sotype, writes_todo;
418         int procrastinate;
419         u_quad_t cur_usec;
420
421 #ifndef nolint
422         cacherep = RC_DOIT;
423         writes_todo = 0;
424 #endif
425         if (nfsd == (struct nfsd *)0) {
426                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
427                         malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
428                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
429                 s = splnet();
430                 nfsd->nfsd_td = td;
431                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
432                 nfs_numnfsd++;
433         } else
434                 s = splnet();
435
436         /*
437          * Loop getting rpc requests until SIGKILL.
438          */
439         for (;;) {
440                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
441                         while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
442                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
443                                 nfsd->nfsd_flag |= NFSD_WAITING;
444                                 nfsd_waiting++;
445                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
446                                 nfsd_waiting--;
447                                 if (error)
448                                         goto done;
449                         }
450                         if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
451                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
452                                 for (slp = nfssvc_sockhead.tqh_first; slp != 0;
453                                     slp = slp->ns_chain.tqe_next) {
454                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
455                                         == (SLP_VALID | SLP_DOREC)) {
456                                             slp->ns_flag &= ~SLP_DOREC;
457                                             slp->ns_sref++;
458                                             nfsd->nfsd_slp = slp;
459                                             break;
460                                     }
461                                 }
462                                 if (slp == 0)
463                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
464                         }
465                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
466                                 continue;
467                         if (slp->ns_flag & SLP_VALID) {
468                                 if (slp->ns_flag & SLP_DISCONN)
469                                         nfsrv_zapsock(slp);
470                                 else if (slp->ns_flag & SLP_NEEDQ) {
471                                         slp->ns_flag &= ~SLP_NEEDQ;
472                                         (void) nfs_slplock(slp, 1);
473                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
474                                                 M_WAIT);
475                                         nfs_slpunlock(slp);
476                                 }
477                                 error = nfsrv_dorec(slp, nfsd, &nd);
478                                 cur_usec = nfs_curusec();
479                                 if (error && slp->ns_tq.lh_first &&
480                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
481                                         error = 0;
482                                         cacherep = RC_DOIT;
483                                         writes_todo = 1;
484                                 } else
485                                         writes_todo = 0;
486                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
487                         }
488                 } else {
489                         error = 0;
490                         slp = nfsd->nfsd_slp;
491                 }
492                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
493                         if (nd) {
494                                 free((caddr_t)nd, M_NFSRVDESC);
495                                 nd = NULL;
496                         }
497                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
498                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
499                         nfsrv_slpderef(slp);
500                         continue;
501                 }
502                 splx(s);
503                 sotype = slp->ns_so->so_type;
504                 if (nd) {
505                     getmicrotime(&nd->nd_starttime);
506                     if (nd->nd_nam2)
507                         nd->nd_nam = nd->nd_nam2;
508                     else
509                         nd->nd_nam = slp->ns_nam;
510
511                     /*
512                      * Check to see if authorization is needed.
513                      */
514                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
515                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
516                         nsd->nsd_haddr = 
517                                 ((struct sockaddr_in *)
518                                  nd->nd_nam)->sin_addr.s_addr;
519                         nsd->nsd_authlen = nfsd->nfsd_authlen;
520                         nsd->nsd_verflen = nfsd->nfsd_verflen;
521                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
522                                 nfsd->nfsd_authlen) &&
523                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
524                                 nfsd->nfsd_verflen) &&
525                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
526                             return (ENEEDAUTH);
527                         cacherep = RC_DROPIT;
528                     } else
529                         cacherep = nfsrv_getcache(nd, slp, &mreq);
530
531                     /*
532                      * Check for just starting up for NQNFS and send
533                      * fake "try again later" replies to the NQNFS clients.
534                      */
535                     if (notstarted && nqnfsstarttime <= time_second) {
536                         if (modify_flag) {
537                                 nqnfsstarttime = time_second + nqsrv_writeslack;
538                                 modify_flag = 0;
539                         } else
540                                 notstarted = 0;
541                     }
542                     if (notstarted) {
543                         if ((nd->nd_flag & ND_NQNFS) == 0)
544                                 cacherep = RC_DROPIT;
545                         else if (nd->nd_procnum != NFSPROC_WRITE) {
546                                 nd->nd_procnum = NFSPROC_NOOP;
547                                 nd->nd_repstat = NQNFS_TRYLATER;
548                                 cacherep = RC_DOIT;
549                         } else
550                                 modify_flag = 1;
551                     } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
552                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
553                         nd->nd_procnum = NFSPROC_NOOP;
554                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
555                         cacherep = RC_DOIT;
556                     } else if (nfs_privport) {
557                         /* Check if source port is privileged */
558                         u_short port;
559                         struct sockaddr *nam = nd->nd_nam;
560                         struct sockaddr_in *sin;
561
562                         sin = (struct sockaddr_in *)nam;
563                         port = ntohs(sin->sin_port);
564                         if (port >= IPPORT_RESERVED && 
565                             nd->nd_procnum != NFSPROC_NULL) {
566                             nd->nd_procnum = NFSPROC_NOOP;
567                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
568                             cacherep = RC_DOIT;
569                             printf("NFS request from unprivileged port (%s:%d)\n",
570                                    inet_ntoa(sin->sin_addr), port);
571                         }
572                     }
573
574                 }
575
576                 /*
577                  * Loop to get all the write rpc relies that have been
578                  * gathered together.
579                  */
580                 do {
581                     switch (cacherep) {
582                     case RC_DOIT:
583                         if (nd && (nd->nd_flag & ND_NFSV3))
584                             procrastinate = nfsrvw_procrastinate_v3;
585                         else
586                             procrastinate = nfsrvw_procrastinate;
587                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
588                             procrastinate > 0 && !notstarted))
589                             error = nfsrv_writegather(&nd, slp,
590                                 nfsd->nfsd_td, &mreq);
591                         else
592                             error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
593                                 slp, nfsd->nfsd_td, &mreq);
594                         if (mreq == NULL)
595                                 break;
596                         if (error != 0 && error != NFSERR_RETVOID) {
597                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
598                                         nfsstats.srv_errs++;
599                                 nfsrv_updatecache(nd, FALSE, mreq);
600                                 if (nd->nd_nam2)
601                                         FREE(nd->nd_nam2, M_SONAME);
602                                 break;
603                         }
604                         nfsstats.srvrpccnt[nd->nd_procnum]++;
605                         nfsrv_updatecache(nd, TRUE, mreq);
606                         nd->nd_mrep = (struct mbuf *)0;
607                     case RC_REPLY:
608                         m = mreq;
609                         siz = 0;
610                         while (m) {
611                                 siz += m->m_len;
612                                 m = m->m_next;
613                         }
614                         if (siz <= 0 || siz > NFS_MAXPACKET) {
615                                 printf("mbuf siz=%d\n",siz);
616                                 panic("Bad nfs svc reply");
617                         }
618                         m = mreq;
619                         m->m_pkthdr.len = siz;
620                         m->m_pkthdr.rcvif = (struct ifnet *)0;
621                         /*
622                          * For stream protocols, prepend a Sun RPC
623                          * Record Mark.
624                          */
625                         if (sotype == SOCK_STREAM) {
626                                 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
627                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
628                         }
629                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
630                                 (void) nfs_slplock(slp, 1);
631                         if (slp->ns_flag & SLP_VALID)
632                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
633                         else {
634                             error = EPIPE;
635                             m_freem(m);
636                         }
637                         if (nfsrtton)
638                                 nfsd_rt(sotype, nd, cacherep);
639                         if (nd->nd_nam2)
640                                 FREE(nd->nd_nam2, M_SONAME);
641                         if (nd->nd_mrep)
642                                 m_freem(nd->nd_mrep);
643                         if (error == EPIPE)
644                                 nfsrv_zapsock(slp);
645                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
646                                 nfs_slpunlock(slp);
647                         if (error == EINTR || error == ERESTART) {
648                                 free((caddr_t)nd, M_NFSRVDESC);
649                                 nfsrv_slpderef(slp);
650                                 s = splnet();
651                                 goto done;
652                         }
653                         break;
654                     case RC_DROPIT:
655                         if (nfsrtton)
656                                 nfsd_rt(sotype, nd, cacherep);
657                         m_freem(nd->nd_mrep);
658                         if (nd->nd_nam2)
659                                 FREE(nd->nd_nam2, M_SONAME);
660                         break;
661                     };
662                     if (nd) {
663                         FREE((caddr_t)nd, M_NFSRVDESC);
664                         nd = NULL;
665                     }
666
667                     /*
668                      * Check to see if there are outstanding writes that
669                      * need to be serviced.
670                      */
671                     cur_usec = nfs_curusec();
672                     s = splsoftclock();
673                     if (slp->ns_tq.lh_first &&
674                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
675                         cacherep = RC_DOIT;
676                         writes_todo = 1;
677                     } else
678                         writes_todo = 0;
679                     splx(s);
680                 } while (writes_todo);
681                 s = splnet();
682                 if (nfsrv_dorec(slp, nfsd, &nd)) {
683                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
684                         nfsd->nfsd_slp = NULL;
685                         nfsrv_slpderef(slp);
686                 }
687         }
688 done:
689         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
690         splx(s);
691         free((caddr_t)nfsd, M_NFSD);
692         nsd->nsd_nfsd = (struct nfsd *)0;
693         if (--nfs_numnfsd == 0)
694                 nfsrv_init(TRUE);       /* Reinitialize everything */
695         return (error);
696 }
697
698 /*
699  * Shut down a socket associated with an nfssvc_sock structure.
700  * Should be called with the send lock set, if required.
701  * The trick here is to increment the sref at the start, so that the nfsds
702  * will stop using it and clear ns_flag at the end so that it will not be
703  * reassigned during cleanup.
704  */
705 static void
706 nfsrv_zapsock(slp)
707         struct nfssvc_sock *slp;
708 {
709         struct nfsuid *nuidp, *nnuidp;
710         struct nfsrv_descript *nwp, *nnwp;
711         struct socket *so;
712         struct file *fp;
713         struct nfsrv_rec *rec;
714         int s;
715
716         slp->ns_flag &= ~SLP_ALLFLAGS;
717         fp = slp->ns_fp;
718         if (fp) {
719                 slp->ns_fp = (struct file *)0;
720                 so = slp->ns_so;
721                 so->so_rcv.sb_flags &= ~SB_UPCALL;
722                 so->so_upcall = NULL;
723                 so->so_upcallarg = NULL;
724                 soshutdown(so, 2);
725                 closef(fp, NULL);
726                 if (slp->ns_nam)
727                         FREE(slp->ns_nam, M_SONAME);
728                 m_freem(slp->ns_raw);
729                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
730                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
731                         if (rec->nr_address)
732                                 FREE(rec->nr_address, M_SONAME);
733                         m_freem(rec->nr_packet);
734                         free(rec, M_NFSRVDESC);
735                 }
736                 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0;
737                     nuidp = nnuidp) {
738                         nnuidp = nuidp->nu_lru.tqe_next;
739                         LIST_REMOVE(nuidp, nu_hash);
740                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
741                         if (nuidp->nu_flag & NU_NAM)
742                                 FREE(nuidp->nu_nam, M_SONAME);
743                         free((caddr_t)nuidp, M_NFSUID);
744                 }
745                 s = splsoftclock();
746                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
747                         nnwp = nwp->nd_tq.le_next;
748                         LIST_REMOVE(nwp, nd_tq);
749                         free((caddr_t)nwp, M_NFSRVDESC);
750                 }
751                 LIST_INIT(&slp->ns_tq);
752                 splx(s);
753         }
754 }
755
756 /*
757  * Derefence a server socket structure. If it has no more references and
758  * is no longer valid, you can throw it away.
759  */
760 void
761 nfsrv_slpderef(slp)
762         struct nfssvc_sock *slp;
763 {
764         if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
765                 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
766                 free((caddr_t)slp, M_NFSSVC);
767         }
768 }
769
770 /*
771  * Lock a socket against others.
772  */
773 int
774 nfs_slplock(slp, wait)
775         struct nfssvc_sock *slp;
776         int wait;
777 {
778         int *statep = &slp->ns_solock;
779
780         if (!wait && (*statep & NFSSTA_SNDLOCK))
781                 return(0);      /* already locked, fail */
782         while (*statep & NFSSTA_SNDLOCK) {
783                 *statep |= NFSSTA_WANTSND;
784                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
785         }
786         *statep |= NFSSTA_SNDLOCK;
787         return (1);
788 }
789
790 /*
791  * Unlock the stream socket for others.
792  */
793 void
794 nfs_slpunlock(slp)
795         struct nfssvc_sock *slp;
796 {
797         int *statep = &slp->ns_solock;
798
799         if ((*statep & NFSSTA_SNDLOCK) == 0)
800                 panic("nfs slpunlock");
801         *statep &= ~NFSSTA_SNDLOCK;
802         if (*statep & NFSSTA_WANTSND) {
803                 *statep &= ~NFSSTA_WANTSND;
804                 wakeup((caddr_t)statep);
805         }
806 }
807
808 /*
809  * Initialize the data structures for the server.
810  * Handshake with any new nfsds starting up to avoid any chance of
811  * corruption.
812  */
813 void
814 nfsrv_init(terminating)
815         int terminating;
816 {
817         struct nfssvc_sock *slp, *nslp;
818
819         if (nfssvc_sockhead_flag & SLP_INIT)
820                 panic("nfsd init");
821         nfssvc_sockhead_flag |= SLP_INIT;
822         if (terminating) {
823                 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) {
824                         nslp = slp->ns_chain.tqe_next;
825                         if (slp->ns_flag & SLP_VALID)
826                                 nfsrv_zapsock(slp);
827                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
828                         free((caddr_t)slp, M_NFSSVC);
829                 }
830                 nfsrv_cleancache();     /* And clear out server cache */
831         } else
832                 nfs_pub.np_valid = 0;
833
834         TAILQ_INIT(&nfssvc_sockhead);
835         nfssvc_sockhead_flag &= ~SLP_INIT;
836         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
837                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
838                 wakeup((caddr_t)&nfssvc_sockhead);
839         }
840
841         TAILQ_INIT(&nfsd_head);
842         nfsd_head_flag &= ~NFSD_CHECKSLP;
843
844 #if 0
845         nfs_udpsock = (struct nfssvc_sock *)
846             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
847         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
848         STAILQ_INIT(&nfs_udpsock->ns_rec);
849         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
850         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
851
852         nfs_cltpsock = (struct nfssvc_sock *)
853             malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
854         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
855         STAILQ_INIT(&nfs_cltpsock->ns_rec);
856         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
857         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
858 #endif
859 }
860
861 /*
862  * Add entries to the server monitor log.
863  */
864 static void
865 nfsd_rt(sotype, nd, cacherep)
866         int sotype;
867         struct nfsrv_descript *nd;
868         int cacherep;
869 {
870         struct drt *rt;
871
872         rt = &nfsdrt.drt[nfsdrt.pos];
873         if (cacherep == RC_DOIT)
874                 rt->flag = 0;
875         else if (cacherep == RC_REPLY)
876                 rt->flag = DRT_CACHEREPLY;
877         else
878                 rt->flag = DRT_CACHEDROP;
879         if (sotype == SOCK_STREAM)
880                 rt->flag |= DRT_TCP;
881         if (nd->nd_flag & ND_NQNFS)
882                 rt->flag |= DRT_NQNFS;
883         else if (nd->nd_flag & ND_NFSV3)
884                 rt->flag |= DRT_NFSV3;
885         rt->proc = nd->nd_procnum;
886         if (nd->nd_nam->sa_family == AF_INET)
887             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
888         else
889             rt->ipadr = INADDR_ANY;
890         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
891         getmicrotime(&rt->tstamp);
892         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
893 }
894 #endif /* NFS_NOSERVER */
895
896 static int nfs_defect = 0;
897 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
898
899 /*
900  * Asynchronous I/O daemons for client nfs.
901  * They do read-ahead and write-behind operations on the block I/O cache.
902  * Never returns unless it fails or gets killed.
903  */
904 static int
905 nfssvc_iod(struct thread *td)
906 {
907         struct buf *bp;
908         int i, myiod;
909         struct nfsmount *nmp;
910         int error = 0;
911
912         /*
913          * Assign my position or return error if too many already running
914          */
915         myiod = -1;
916         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
917                 if (nfs_asyncdaemon[i] == 0) {
918                         nfs_asyncdaemon[i]++;
919                         myiod = i;
920                         break;
921                 }
922         if (myiod == -1)
923                 return (EBUSY);
924         nfs_numasync++;
925         /*
926          * Just loop around doin our stuff until SIGKILL
927          */
928         for (;;) {
929             while (((nmp = nfs_iodmount[myiod]) == NULL
930                     || nmp->nm_bufq.tqh_first == NULL)
931                    && error == 0) {
932                 if (nmp)
933                     nmp->nm_bufqiods--;
934                 nfs_iodwant[myiod] = td;
935                 nfs_iodmount[myiod] = NULL;
936                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
937                         PCATCH, "nfsidl", 0);
938             }
939             if (error) {
940                 nfs_asyncdaemon[myiod] = 0;
941                 if (nmp)
942                     nmp->nm_bufqiods--;
943                 nfs_iodwant[myiod] = NULL;
944                 nfs_iodmount[myiod] = NULL;
945                 nfs_numasync--;
946                 return (error);
947             }
948             while ((bp = nmp->nm_bufq.tqh_first) != NULL) {
949                 /* Take one off the front of the list */
950                 TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
951                 nmp->nm_bufqlen--;
952                 if (nmp->nm_bufqwant && nmp->nm_bufqlen <= nfs_numasync) {
953                     nmp->nm_bufqwant = FALSE;
954                     wakeup(&nmp->nm_bufq);
955                 }
956                 (void) nfs_doio(bp, NULL);
957                 /*
958                  * If there are more than one iod on this mount, then defect
959                  * so that the iods can be shared out fairly between the mounts
960                  */
961                 if (nfs_defect && nmp->nm_bufqiods > 1) {
962                     NFS_DPF(ASYNCIO,
963                             ("nfssvc_iod: iod %d defecting from mount %p\n",
964                              myiod, nmp));
965                     nfs_iodmount[myiod] = NULL;
966                     nmp->nm_bufqiods--;
967                     break;
968                 }
969             }
970         }
971 }
972
973
974 /*
975  * Get an authorization string for the uid by having the mount_nfs sitting
976  * on this mount point porpous out of the kernel and do it.
977  */
978 int
979 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
980         struct nfsmount *nmp;
981         struct nfsreq *rep;
982         struct ucred *cred;
983         char **auth_str;
984         int *auth_len;
985         char *verf_str;
986         int *verf_len;
987         NFSKERBKEY_T key;               /* return session key */
988 {
989         int error = 0;
990
991         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
992                 nmp->nm_state |= NFSSTA_WANTAUTH;
993                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
994                         "nfsauth1", 2 * hz);
995                 error = nfs_sigintr(nmp, rep, rep->r_td);
996                 if (error) {
997                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
998                         return (error);
999                 }
1000         }
1001         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1002         nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1003         nmp->nm_authlen = RPCAUTH_MAXSIZ;
1004         nmp->nm_verfstr = verf_str;
1005         nmp->nm_verflen = *verf_len;
1006         nmp->nm_authuid = cred->cr_uid;
1007         wakeup((caddr_t)&nmp->nm_authstr);
1008
1009         /*
1010          * And wait for mount_nfs to do its stuff.
1011          */
1012         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1013                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1014                         "nfsauth2", 2 * hz);
1015                 error = nfs_sigintr(nmp, rep, rep->r_td);
1016         }
1017         if (nmp->nm_state & NFSSTA_AUTHERR) {
1018                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1019                 error = EAUTH;
1020         }
1021         if (error)
1022                 free((caddr_t)*auth_str, M_TEMP);
1023         else {
1024                 *auth_len = nmp->nm_authlen;
1025                 *verf_len = nmp->nm_verflen;
1026                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1027         }
1028         nmp->nm_state &= ~NFSSTA_HASAUTH;
1029         nmp->nm_state |= NFSSTA_WAITAUTH;
1030         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1031                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1032                 wakeup((caddr_t)&nmp->nm_authtype);
1033         }
1034         return (error);
1035 }
1036
1037 /*
1038  * Get a nickname authenticator and verifier.
1039  */
1040 int
1041 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
1042         struct nfsmount *nmp;
1043         struct ucred *cred;
1044         char **auth_str;
1045         int *auth_len;
1046         char *verf_str;
1047         int verf_len;
1048 {
1049         struct nfsuid *nuidp;
1050         u_int32_t *nickp, *verfp;
1051         struct timeval ktvin, ktvout;
1052
1053 #ifdef DIAGNOSTIC
1054         if (verf_len < (4 * NFSX_UNSIGNED))
1055                 panic("nfs_getnickauth verf too small");
1056 #endif
1057         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1058             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1059                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1060                         break;
1061         }
1062         if (!nuidp || nuidp->nu_expire < time_second)
1063                 return (EACCES);
1064
1065         /*
1066          * Move to the end of the lru list (end of lru == most recently used).
1067          */
1068         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1069         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1070
1071         nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1072         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1073         *nickp = txdr_unsigned(nuidp->nu_nickname);
1074         *auth_str = (char *)nickp;
1075         *auth_len = 2 * NFSX_UNSIGNED;
1076
1077         /*
1078          * Now we must encrypt the verifier and package it up.
1079          */
1080         verfp = (u_int32_t *)verf_str;
1081         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1082         if (time_second > nuidp->nu_timestamp.tv_sec ||
1083             (time_second == nuidp->nu_timestamp.tv_sec &&
1084              time_second > nuidp->nu_timestamp.tv_usec))
1085                 getmicrotime(&nuidp->nu_timestamp);
1086         else
1087                 nuidp->nu_timestamp.tv_usec++;
1088         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1089         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1090
1091         /*
1092          * Now encrypt the timestamp verifier in ecb mode using the session
1093          * key.
1094          */
1095 #ifdef NFSKERB
1096         XXX
1097 #endif
1098
1099         *verfp++ = ktvout.tv_sec;
1100         *verfp++ = ktvout.tv_usec;
1101         *verfp = 0;
1102         return (0);
1103 }
1104
1105 /*
1106  * Save the current nickname in a hash list entry on the mount point.
1107  */
1108 int
1109 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
1110         struct nfsmount *nmp;
1111         struct ucred *cred;
1112         int len;
1113         NFSKERBKEY_T key;
1114         struct mbuf **mdp;
1115         char **dposp;
1116         struct mbuf *mrep;
1117 {
1118         struct nfsuid *nuidp;
1119         u_int32_t *tl;
1120         int32_t t1;
1121         struct mbuf *md = *mdp;
1122         struct timeval ktvin, ktvout;
1123         u_int32_t nick;
1124         char *dpos = *dposp, *cp2;
1125         int deltasec, error = 0;
1126
1127         if (len == (3 * NFSX_UNSIGNED)) {
1128                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1129                 ktvin.tv_sec = *tl++;
1130                 ktvin.tv_usec = *tl++;
1131                 nick = fxdr_unsigned(u_int32_t, *tl);
1132
1133                 /*
1134                  * Decrypt the timestamp in ecb mode.
1135                  */
1136 #ifdef NFSKERB
1137                 XXX
1138 #endif
1139                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1140                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1141                 deltasec = time_second - ktvout.tv_sec;
1142                 if (deltasec < 0)
1143                         deltasec = -deltasec;
1144                 /*
1145                  * If ok, add it to the hash list for the mount point.
1146                  */
1147                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1148                         if (nmp->nm_numuids < nuidhash_max) {
1149                                 nmp->nm_numuids++;
1150                                 nuidp = (struct nfsuid *)
1151                                    malloc(sizeof (struct nfsuid), M_NFSUID,
1152                                         M_WAITOK);
1153                         } else {
1154                                 nuidp = nmp->nm_uidlruhead.tqh_first;
1155                                 LIST_REMOVE(nuidp, nu_hash);
1156                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1157                                         nu_lru);
1158                         }
1159                         nuidp->nu_flag = 0;
1160                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1161                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1162                         nuidp->nu_timestamp = ktvout;
1163                         nuidp->nu_nickname = nick;
1164                         bcopy(key, nuidp->nu_key, sizeof (key));
1165                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1166                                 nu_lru);
1167                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1168                                 nuidp, nu_hash);
1169                 }
1170         } else
1171                 nfsm_adv(nfsm_rndup(len));
1172 nfsmout:
1173         *mdp = md;
1174         *dposp = dpos;
1175         return (error);
1176 }