9ddb4997dc8f59fcd31bf85d80aa7b1f93db963a
[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 1.30 2007/05/18 17:05:13 dillon 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/resourcevar.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/domain.h>
58 #include <sys/protosw.h>
59 #include <sys/nlookup.h>
60 #include <vm/vm_zone.h>
61
62 #include <netinet/in.h>
63 #include <netinet/tcp.h>
64 #include "xdr_subs.h"
65 #include "rpcv2.h"
66 #include "nfsproto.h"
67 #include "nfs.h"
68 #include "nfsm_subs.h"
69 #include "nfsrvcache.h"
70 #include "nfsmount.h"
71 #include "nfsnode.h"
72 #include "nfsrtt.h"
73
74 #include <sys/thread2.h>
75
76 static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
77
78 /* Global defs. */
79 extern int32_t (*nfsrv3_procs[NFS_NPROCS]) (struct nfsrv_descript *nd,
80                                             struct nfssvc_sock *slp,
81                                             struct thread *td,
82                                             struct mbuf **mreqp);
83 extern int nfs_numasync;
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 (struct nfssvc_sock *slp);
92 #endif
93 static int      nfssvc_iod (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 void     nfsd_rt (int sotype, struct nfsrv_descript *nd,
107                              int cacherep);
108 static int      nfssvc_addsock (struct file *, struct sockaddr *,
109                                     struct thread *);
110 static int      nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *);
111
112 static int nfs_privport = 0;
113 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
114 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
115 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
116 static int      nfs_soreserve = 65535;
117 SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 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 sys_nfssvc(struct nfssvc_args *uap)
135 {
136 #ifndef NFS_NOSERVER
137         struct nlookupdata 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         struct vnode *vp;
148 #endif /* NFS_NOSERVER */
149         int error;
150         struct thread *td = curthread;
151
152         /*
153          * Must be super user
154          */
155         error = suser(td);
156         if(error)
157                 return (error);
158         KKASSERT(td->td_proc);  /* for ucred and p_fd */
159         while (nfssvc_sockhead_flag & SLP_INIT) {
160                  nfssvc_sockhead_flag |= SLP_WANTINIT;
161                 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
162         }
163         if (uap->flag & NFSSVC_BIOD)
164                 error = nfssvc_iod(td);
165 #ifdef NFS_NOSERVER
166         else
167                 error = ENXIO;
168 #else /* !NFS_NOSERVER */
169         else if (uap->flag & NFSSVC_MNTD) {
170                 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
171                 if (error)
172                         return (error);
173                 vp = NULL;
174                 error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE, 
175                                         NLC_FOLLOW);
176                 if (error == 0)
177                         error = nlookup(&nd);
178                 if (error == 0)
179                         error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);   
180                 nlookup_done(&nd);
181                 if (error)
182                         return (error);
183
184                 if ((vp->v_flag & VROOT) == 0)
185                         error = EINVAL;
186                 nmp = VFSTONFS(vp->v_mount);
187                 vput(vp);
188                 if (error)
189                         return (error);
190                 if ((nmp->nm_state & NFSSTA_MNTD) &&
191                         (uap->flag & NFSSVC_GOTAUTH) == 0)
192                         return (0);
193                 nmp->nm_state |= NFSSTA_MNTD;
194                 error = nfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
195                                     uap->argp, td);
196         } else if (uap->flag & NFSSVC_ADDSOCK) {
197                 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
198                 if (error)
199                         return (error);
200                 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
201                 if (error)
202                         return (error);
203                 /*
204                  * Get the client address for connected sockets.
205                  */
206                 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
207                         nam = (struct sockaddr *)0;
208                 else {
209                         error = getsockaddr(&nam, nfsdarg.name,
210                                             nfsdarg.namelen);
211                         if (error) {
212                                 fdrop(fp);
213                                 return (error);
214                         }
215                 }
216                 error = nfssvc_addsock(fp, nam, td);
217                 fdrop(fp);
218         } else {
219                 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
220                 if (error)
221                         return (error);
222                 if ((uap->flag & NFSSVC_AUTHIN) &&
223                     ((nfsd = nsd->nsd_nfsd)) != NULL &&
224                     (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
225                         slp = nfsd->nfsd_slp;
226
227                         /*
228                          * First check to see if another nfsd has already
229                          * added this credential.
230                          */
231                         for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
232                             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
233                                 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
234                                     (!nfsd->nfsd_nd->nd_nam2 ||
235                                      netaddr_match(NU_NETFAM(nuidp),
236                                      &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
237                                         break;
238                         }
239                         if (nuidp) {
240                             nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
241                             nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
242                         } else {
243                             /*
244                              * Nope, so we will.
245                              */
246                             if (slp->ns_numuids < nuidhash_max) {
247                                 slp->ns_numuids++;
248                                 nuidp = (struct nfsuid *)
249                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
250                                         M_WAITOK);
251                             } else
252                                 nuidp = (struct nfsuid *)0;
253                             if ((slp->ns_flag & SLP_VALID) == 0) {
254                                 if (nuidp)
255                                     kfree((caddr_t)nuidp, M_NFSUID);
256                             } else {
257                                 if (nuidp == (struct nfsuid *)0) {
258                                     nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
259                                     LIST_REMOVE(nuidp, nu_hash);
260                                     TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
261                                         nu_lru);
262                                     if (nuidp->nu_flag & NU_NAM)
263                                         FREE(nuidp->nu_nam, M_SONAME);
264                                 }
265                                 nuidp->nu_flag = 0;
266                                 nuidp->nu_cr = nsd->nsd_cr;
267                                 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
268                                     nuidp->nu_cr.cr_ngroups = NGROUPS;
269                                 nuidp->nu_cr.cr_ref = 1;
270                                 nuidp->nu_timestamp = nsd->nsd_timestamp;
271                                 nuidp->nu_expire = time_second + nsd->nsd_ttl;
272                                 /*
273                                  * and save the session key in nu_key.
274                                  */
275                                 bcopy(nsd->nsd_key, nuidp->nu_key,
276                                     sizeof (nsd->nsd_key));
277                                 if (nfsd->nfsd_nd->nd_nam2) {
278                                     struct sockaddr_in *saddr;
279
280                                     saddr = (struct sockaddr_in *)
281                                             nfsd->nfsd_nd->nd_nam2;
282                                     switch (saddr->sin_family) {
283                                     case AF_INET:
284                                         nuidp->nu_flag |= NU_INETADDR;
285                                         nuidp->nu_inetaddr =
286                                              saddr->sin_addr.s_addr;
287                                         break;
288                                     case AF_ISO:
289                                     default:
290                                         nuidp->nu_flag |= NU_NAM;
291                                         nuidp->nu_nam = 
292                                           dup_sockaddr(nfsd->nfsd_nd->nd_nam2);
293                                         break;
294                                     };
295                                 }
296                                 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
297                                         nu_lru);
298                                 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
299                                         nuidp, nu_hash);
300                                 nfsrv_setcred(&nuidp->nu_cr,
301                                     &nfsd->nfsd_nd->nd_cr);
302                                 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
303                             }
304                         }
305                 }
306                 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
307                         nfsd->nfsd_flag |= NFSD_AUTHFAIL;
308                 error = nfssvc_nfsd(nsd, uap->argp, td);
309         }
310 #endif /* NFS_NOSERVER */
311         if (error == EINTR || error == ERESTART)
312                 error = 0;
313         return (error);
314 }
315
316 #ifndef NFS_NOSERVER
317 /*
318  * Adds a socket to the list for servicing by nfsds.
319  */
320 static int
321 nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
322 {
323         int siz;
324         struct nfssvc_sock *slp;
325         struct socket *so;
326         int error;
327
328         so = (struct socket *)fp->f_data;
329 #if 0
330         tslp = (struct nfssvc_sock *)0;
331         /*
332          * Add it to the list, as required.
333          */
334         if (so->so_proto->pr_protocol == IPPROTO_UDP) {
335                 tslp = nfs_udpsock;
336                 if (tslp->ns_flag & SLP_VALID) {
337                         if (mynam != NULL)
338                                 FREE(mynam, M_SONAME);
339                         return (EPERM);
340                 }
341         }
342 #endif
343         /*
344          * Reserve buffer space in the socket.  Note that due to bugs in
345          * Linux's delayed-ack code, serious performance degredation may
346          * occur with linux hosts if the minimum is used.
347          */
348         if (so->so_type == SOCK_STREAM)
349                 siz = NFS_MAXPACKET + sizeof (u_long);
350         else
351                 siz = NFS_MAXPACKET;
352         if (siz < nfs_soreserve)
353             siz = nfs_soreserve;
354         if (siz > sb_max_adj) {
355             kprintf("Warning: vfs.nfs.soreserve (%d) "
356                 "limited to adjusted sb_max (%ld)\n",
357                 nfs_soreserve, sb_max_adj);
358             siz = sb_max_adj;
359         }
360
361         error = soreserve(so, siz, siz, &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
362         if (error) {
363                 if (mynam != NULL)
364                         FREE(mynam, M_SONAME);
365                 return (error);
366         }
367
368         /*
369          * Set protocol specific options { for now TCP only } and
370          * reserve some space. For datagram sockets, this can get called
371          * repeatedly for the same socket, but that isn't harmful.
372          */
373         if (so->so_type == SOCK_STREAM) {
374                 struct sockopt sopt;
375                 int val;
376
377                 bzero(&sopt, sizeof sopt);
378                 sopt.sopt_level = SOL_SOCKET;
379                 sopt.sopt_name = SO_KEEPALIVE;
380                 sopt.sopt_val = &val;
381                 sopt.sopt_valsize = sizeof val;
382                 val = 1;
383                 sosetopt(so, &sopt);
384         }
385         if (so->so_proto->pr_domain->dom_family == AF_INET &&
386             so->so_proto->pr_protocol == IPPROTO_TCP) {
387                 struct sockopt sopt;
388                 int val;
389
390                 bzero(&sopt, sizeof sopt);
391                 sopt.sopt_level = IPPROTO_TCP;
392                 sopt.sopt_name = TCP_NODELAY;
393                 sopt.sopt_val = &val;
394                 sopt.sopt_valsize = sizeof val;
395                 val = 1;
396                 sosetopt(so, &sopt);
397         }
398         so->so_rcv.ssb_flags &= ~SSB_NOINTR;
399         so->so_rcv.ssb_timeo = 0;
400         so->so_snd.ssb_flags &= ~SSB_NOINTR;
401         so->so_snd.ssb_timeo = 0;
402
403         slp = (struct nfssvc_sock *)
404                 kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
405         bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
406         STAILQ_INIT(&slp->ns_rec);
407         TAILQ_INIT(&slp->ns_uidlruhead);
408         TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
409
410         slp->ns_so = so;
411         slp->ns_nam = mynam;
412         fp->f_count++;
413         slp->ns_fp = fp;
414         crit_enter();
415         so->so_upcallarg = (caddr_t)slp;
416         so->so_upcall = nfsrv_rcv;
417         so->so_rcv.ssb_flags |= SSB_UPCALL;
418         slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
419         nfsrv_wakenfsd(slp, 1);
420         crit_exit();
421         return (0);
422 }
423
424 /*
425  * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
426  * until it is killed by a signal.
427  */
428 static int
429 nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
430 {
431         int siz;
432         struct nfssvc_sock *slp;
433         struct nfsd *nfsd = nsd->nsd_nfsd;
434         struct nfsrv_descript *nd = NULL;
435         struct mbuf *m, *mreq;
436         int error = 0, cacherep, sotype, writes_todo;
437         int procrastinate;
438         u_quad_t cur_usec;
439
440 #ifndef nolint
441         cacherep = RC_DOIT;
442         writes_todo = 0;
443 #endif
444         if (nfsd == (struct nfsd *)0) {
445                 nsd->nsd_nfsd = nfsd = (struct nfsd *)
446                         kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
447                 bzero((caddr_t)nfsd, sizeof (struct nfsd));
448                 crit_enter();
449                 nfsd->nfsd_td = td;
450                 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
451                 nfs_numnfsd++;
452         } else
453                 crit_enter();
454
455         /*
456          * Loop getting rpc requests until SIGKILL.
457          */
458         for (;;) {
459                 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
460                         while (nfsd->nfsd_slp == NULL &&
461                             (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
462                                 nfsd->nfsd_flag |= NFSD_WAITING;
463                                 nfsd_waiting++;
464                                 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
465                                 nfsd_waiting--;
466                                 if (error)
467                                         goto done;
468                         }
469                         if (nfsd->nfsd_slp == NULL &&
470                             (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
471                                 TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) {
472                                     if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
473                                         == (SLP_VALID | SLP_DOREC)) {
474                                             slp->ns_flag &= ~SLP_DOREC;
475                                             slp->ns_sref++;
476                                             nfsd->nfsd_slp = slp;
477                                             break;
478                                     }
479                                 }
480                                 if (slp == 0)
481                                         nfsd_head_flag &= ~NFSD_CHECKSLP;
482                         }
483                         if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
484                                 continue;
485                         if (slp->ns_flag & SLP_VALID) {
486                                 if (slp->ns_flag & SLP_DISCONN)
487                                         nfsrv_zapsock(slp);
488                                 else if (slp->ns_flag & SLP_NEEDQ) {
489                                         slp->ns_flag &= ~SLP_NEEDQ;
490                                         (void) nfs_slplock(slp, 1);
491                                         nfsrv_rcv(slp->ns_so, (caddr_t)slp,
492                                                 MB_WAIT);
493                                         nfs_slpunlock(slp);
494                                 }
495                                 error = nfsrv_dorec(slp, nfsd, &nd);
496                                 cur_usec = nfs_curusec();
497                                 if (error && slp->ns_tq.lh_first &&
498                                     slp->ns_tq.lh_first->nd_time <= cur_usec) {
499                                         error = 0;
500                                         cacherep = RC_DOIT;
501                                         writes_todo = 1;
502                                 } else
503                                         writes_todo = 0;
504                                 nfsd->nfsd_flag |= NFSD_REQINPROG;
505                         }
506                 } else {
507                         error = 0;
508                         slp = nfsd->nfsd_slp;
509                 }
510                 if (error || (slp->ns_flag & SLP_VALID) == 0) {
511                         if (nd) {
512                                 kfree((caddr_t)nd, M_NFSRVDESC);
513                                 nd = NULL;
514                         }
515                         nfsd->nfsd_slp = (struct nfssvc_sock *)0;
516                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
517                         nfsrv_slpderef(slp);
518                         continue;
519                 }
520                 crit_exit();
521                 sotype = slp->ns_so->so_type;
522                 if (nd) {
523                     getmicrotime(&nd->nd_starttime);
524                     if (nd->nd_nam2)
525                         nd->nd_nam = nd->nd_nam2;
526                     else
527                         nd->nd_nam = slp->ns_nam;
528
529                     /*
530                      * Check to see if authorization is needed.
531                      */
532                     if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
533                         nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
534                         nsd->nsd_haddr = 
535                                 ((struct sockaddr_in *)
536                                  nd->nd_nam)->sin_addr.s_addr;
537                         nsd->nsd_authlen = nfsd->nfsd_authlen;
538                         nsd->nsd_verflen = nfsd->nfsd_verflen;
539                         if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
540                                 nfsd->nfsd_authlen) &&
541                             !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
542                                 nfsd->nfsd_verflen) &&
543                             !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
544                             return (ENEEDAUTH);
545                         cacherep = RC_DROPIT;
546                     } else {
547                         cacherep = nfsrv_getcache(nd, slp, &mreq);
548                     }
549
550                     if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
551                         nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
552                         nd->nd_procnum = NFSPROC_NOOP;
553                         nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
554                         cacherep = RC_DOIT;
555                     } else if (nfs_privport) {
556                         /* Check if source port is privileged */
557                         u_short port;
558                         struct sockaddr *nam = nd->nd_nam;
559                         struct sockaddr_in *sin;
560
561                         sin = (struct sockaddr_in *)nam;
562                         port = ntohs(sin->sin_port);
563                         if (port >= IPPORT_RESERVED && 
564                             nd->nd_procnum != NFSPROC_NULL) {
565                             nd->nd_procnum = NFSPROC_NOOP;
566                             nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
567                             cacherep = RC_DOIT;
568                             kprintf("NFS request from unprivileged port (%s:%d)\n",
569                                    inet_ntoa(sin->sin_addr), port);
570                         }
571                     }
572
573                 }
574
575                 /*
576                  * Loop to get all the write rpc relies that have been
577                  * gathered together.
578                  */
579                 do {
580                     switch (cacherep) {
581                     case RC_DOIT:
582                         if (nd && (nd->nd_flag & ND_NFSV3))
583                             procrastinate = nfsrvw_procrastinate_v3;
584                         else
585                             procrastinate = nfsrvw_procrastinate;
586                         if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
587                             procrastinate > 0)
588                         ) {
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                         }
595                         if (mreq == NULL)
596                                 break;
597                         if (error != 0 && error != NFSERR_RETVOID) {
598                                 if (nd->nd_procnum != NQNFSPROC_VACATED)
599                                         nfsstats.srv_errs++;
600                                 nfsrv_updatecache(nd, FALSE, mreq);
601                                 if (nd->nd_nam2)
602                                         FREE(nd->nd_nam2, M_SONAME);
603                                 break;
604                         }
605                         nfsstats.srvrpccnt[nd->nd_procnum]++;
606                         nfsrv_updatecache(nd, TRUE, mreq);
607                         nd->nd_mrep = (struct mbuf *)0;
608                     case RC_REPLY:
609                         m = mreq;
610                         siz = 0;
611                         while (m) {
612                                 siz += m->m_len;
613                                 m = m->m_next;
614                         }
615                         if (siz <= 0 || siz > NFS_MAXPACKET) {
616                                 kprintf("mbuf siz=%d\n",siz);
617                                 panic("Bad nfs svc reply");
618                         }
619                         m = mreq;
620                         m->m_pkthdr.len = siz;
621                         m->m_pkthdr.rcvif = (struct ifnet *)0;
622                         /*
623                          * For stream protocols, prepend a Sun RPC
624                          * Record Mark.
625                          */
626                         if (sotype == SOCK_STREAM) {
627                                 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
628                                 if (m == NULL)
629                                         return (ENOBUFS);
630                                 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
631                         }
632                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
633                                 (void) nfs_slplock(slp, 1);
634                         if (slp->ns_flag & SLP_VALID)
635                             error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL);
636                         else {
637                             error = EPIPE;
638                             m_freem(m);
639                         }
640                         if (nfsrtton)
641                                 nfsd_rt(sotype, nd, cacherep);
642                         if (nd->nd_nam2)
643                                 FREE(nd->nd_nam2, M_SONAME);
644                         if (nd->nd_mrep)
645                                 m_freem(nd->nd_mrep);
646                         if (error == EPIPE)
647                                 nfsrv_zapsock(slp);
648                         if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED)
649                                 nfs_slpunlock(slp);
650                         if (error == EINTR || error == ERESTART) {
651                                 kfree((caddr_t)nd, M_NFSRVDESC);
652                                 nfsrv_slpderef(slp);
653                                 crit_enter();
654                                 goto done;
655                         }
656                         break;
657                     case RC_DROPIT:
658                         if (nfsrtton)
659                                 nfsd_rt(sotype, nd, cacherep);
660                         m_freem(nd->nd_mrep);
661                         if (nd->nd_nam2)
662                                 FREE(nd->nd_nam2, M_SONAME);
663                         break;
664                     };
665                     if (nd) {
666                         FREE((caddr_t)nd, M_NFSRVDESC);
667                         nd = NULL;
668                     }
669
670                     /*
671                      * Check to see if there are outstanding writes that
672                      * need to be serviced.
673                      */
674                     cur_usec = nfs_curusec();
675                     crit_enter();
676                     if (slp->ns_tq.lh_first &&
677                         slp->ns_tq.lh_first->nd_time <= cur_usec) {
678                         cacherep = RC_DOIT;
679                         writes_todo = 1;
680                     } else
681                         writes_todo = 0;
682                     crit_exit();
683                 } while (writes_todo);
684                 crit_enter();
685                 if (nfsrv_dorec(slp, nfsd, &nd)) {
686                         nfsd->nfsd_flag &= ~NFSD_REQINPROG;
687                         nfsd->nfsd_slp = NULL;
688                         nfsrv_slpderef(slp);
689                 }
690         }
691 done:
692         TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
693         crit_exit();
694         kfree((caddr_t)nfsd, M_NFSD);
695         nsd->nsd_nfsd = (struct nfsd *)0;
696         if (--nfs_numnfsd == 0)
697                 nfsrv_init(TRUE);       /* Reinitialize everything */
698         return (error);
699 }
700
701 /*
702  * Shut down a socket associated with an nfssvc_sock structure.
703  * Should be called with the send lock set, if required.
704  * The trick here is to increment the sref at the start, so that the nfsds
705  * will stop using it and clear ns_flag at the end so that it will not be
706  * reassigned during cleanup.
707  */
708 static void
709 nfsrv_zapsock(struct nfssvc_sock *slp)
710 {
711         struct nfsuid *nuidp, *nnuidp;
712         struct nfsrv_descript *nwp, *nnwp;
713         struct socket *so;
714         struct file *fp;
715         struct nfsrv_rec *rec;
716
717         slp->ns_flag &= ~SLP_ALLFLAGS;
718         fp = slp->ns_fp;
719         if (fp) {
720                 slp->ns_fp = (struct file *)0;
721                 so = slp->ns_so;
722                 so->so_rcv.ssb_flags &= ~SSB_UPCALL;
723                 so->so_upcall = NULL;
724                 so->so_upcallarg = NULL;
725                 soshutdown(so, SHUT_RDWR);
726                 closef(fp, NULL);
727                 if (slp->ns_nam)
728                         FREE(slp->ns_nam, M_SONAME);
729                 m_freem(slp->ns_raw);
730                 while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) {
731                         --slp->ns_numrec;
732                         STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link);
733                         if (rec->nr_address)
734                                 FREE(rec->nr_address, M_SONAME);
735                         m_freem(rec->nr_packet);
736                         kfree(rec, M_NFSRVDESC);
737                 }
738                 TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru,
739                                       nnuidp) {
740                         LIST_REMOVE(nuidp, nu_hash);
741                         TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
742                         if (nuidp->nu_flag & NU_NAM)
743                                 FREE(nuidp->nu_nam, M_SONAME);
744                         kfree((caddr_t)nuidp, M_NFSUID);
745                 }
746                 crit_enter();
747                 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
748                         nnwp = nwp->nd_tq.le_next;
749                         LIST_REMOVE(nwp, nd_tq);
750                         kfree((caddr_t)nwp, M_NFSRVDESC);
751                 }
752                 LIST_INIT(&slp->ns_tq);
753                 crit_exit();
754         }
755 }
756
757 /*
758  * Derefence a server socket structure. If it has no more references and
759  * is no longer valid, you can throw it away.
760  */
761 void
762 nfsrv_slpderef(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                 kfree((caddr_t)slp, M_NFSSVC);
767         }
768 }
769
770 /*
771  * Lock a socket against others.
772  */
773 int
774 nfs_slplock(struct nfssvc_sock *slp, int wait)
775 {
776         int *statep = &slp->ns_solock;
777
778         if (!wait && (*statep & NFSSTA_SNDLOCK))
779                 return(0);      /* already locked, fail */
780         while (*statep & NFSSTA_SNDLOCK) {
781                 *statep |= NFSSTA_WANTSND;
782                 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
783         }
784         *statep |= NFSSTA_SNDLOCK;
785         return (1);
786 }
787
788 /*
789  * Unlock the stream socket for others.
790  */
791 void
792 nfs_slpunlock(struct nfssvc_sock *slp)
793 {
794         int *statep = &slp->ns_solock;
795
796         if ((*statep & NFSSTA_SNDLOCK) == 0)
797                 panic("nfs slpunlock");
798         *statep &= ~NFSSTA_SNDLOCK;
799         if (*statep & NFSSTA_WANTSND) {
800                 *statep &= ~NFSSTA_WANTSND;
801                 wakeup((caddr_t)statep);
802         }
803 }
804
805 /*
806  * Initialize the data structures for the server.
807  * Handshake with any new nfsds starting up to avoid any chance of
808  * corruption.
809  */
810 void
811 nfsrv_init(int terminating)
812 {
813         struct nfssvc_sock *slp, *nslp;
814
815         if (nfssvc_sockhead_flag & SLP_INIT)
816                 panic("nfsd init");
817         nfssvc_sockhead_flag |= SLP_INIT;
818         if (terminating) {
819                 TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) {
820                         if (slp->ns_flag & SLP_VALID)
821                                 nfsrv_zapsock(slp);
822                         TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
823                         kfree((caddr_t)slp, M_NFSSVC);
824                 }
825                 nfsrv_cleancache();     /* And clear out server cache */
826         } else
827                 nfs_pub.np_valid = 0;
828
829         TAILQ_INIT(&nfssvc_sockhead);
830         nfssvc_sockhead_flag &= ~SLP_INIT;
831         if (nfssvc_sockhead_flag & SLP_WANTINIT) {
832                 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
833                 wakeup((caddr_t)&nfssvc_sockhead);
834         }
835
836         TAILQ_INIT(&nfsd_head);
837         nfsd_head_flag &= ~NFSD_CHECKSLP;
838
839 #if 0
840         nfs_udpsock = (struct nfssvc_sock *)
841             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
842         bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
843         STAILQ_INIT(&nfs_udpsock->ns_rec);
844         TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
845         TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
846
847         nfs_cltpsock = (struct nfssvc_sock *)
848             kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
849         bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
850         STAILQ_INIT(&nfs_cltpsock->ns_rec);
851         TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
852         TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
853 #endif
854 }
855
856 /*
857  * Add entries to the server monitor log.
858  */
859 static void
860 nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep)
861 {
862         struct drt *rt;
863
864         rt = &nfsdrt.drt[nfsdrt.pos];
865         if (cacherep == RC_DOIT)
866                 rt->flag = 0;
867         else if (cacherep == RC_REPLY)
868                 rt->flag = DRT_CACHEREPLY;
869         else
870                 rt->flag = DRT_CACHEDROP;
871         if (sotype == SOCK_STREAM)
872                 rt->flag |= DRT_TCP;
873         if (nd->nd_flag & ND_NFSV3)
874                 rt->flag |= DRT_NFSV3;
875         rt->proc = nd->nd_procnum;
876         if (nd->nd_nam->sa_family == AF_INET)
877             rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr;
878         else
879             rt->ipadr = INADDR_ANY;
880         rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
881         getmicrotime(&rt->tstamp);
882         nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
883 }
884 #endif /* NFS_NOSERVER */
885
886 static int nfs_defect = 0;
887 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
888
889 /*
890  * Asynchronous I/O daemons for client nfs.
891  * They do read-ahead and write-behind operations on the block I/O cache.
892  * Never returns unless it fails or gets killed.
893  */
894 static int
895 nfssvc_iod(struct thread *td)
896 {
897         struct bio *bio;
898         int i, myiod;
899         struct nfsmount *nmp;
900         int error = 0;
901
902         /*
903          * Assign my position or return error if too many already running
904          */
905         myiod = -1;
906         for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
907                 if (nfs_asyncdaemon[i] == 0) {
908                         nfs_asyncdaemon[i]++;
909                         myiod = i;
910                         break;
911                 }
912         if (myiod == -1)
913                 return (EBUSY);
914         nfs_numasync++;
915         /*
916          * Just loop around doin our stuff until SIGKILL
917          */
918         for (;;) {
919             while (((nmp = nfs_iodmount[myiod]) == NULL
920                      || TAILQ_EMPTY(&nmp->nm_bioq))
921                    && error == 0) {
922                 if (nmp)
923                     nmp->nm_bioqiods--;
924                 nfs_iodwant[myiod] = td;
925                 nfs_iodmount[myiod] = NULL;
926                 error = tsleep((caddr_t)&nfs_iodwant[myiod],
927                         PCATCH, "nfsidl", 0);
928             }
929             if (error) {
930                 nfs_asyncdaemon[myiod] = 0;
931                 if (nmp)
932                     nmp->nm_bioqiods--;
933                 nfs_iodwant[myiod] = NULL;
934                 nfs_iodmount[myiod] = NULL;
935                 nfs_numasync--;
936                 return (error);
937             }
938             while ((bio = TAILQ_FIRST(&nmp->nm_bioq)) != NULL) {
939                 /* 
940                  * Take one off the front of the list.   The BIO's
941                  * block number is normalized for DEV_BSIZE.
942                  */
943                 TAILQ_REMOVE(&nmp->nm_bioq, bio, bio_act);
944                 nmp->nm_bioqlen--;
945                 if (nmp->nm_bioqwant && nmp->nm_bioqlen <= nfs_numasync) {
946                     nmp->nm_bioqwant = FALSE;
947                     wakeup(&nmp->nm_bioq);
948                 }
949                 nfs_doio((struct vnode *)bio->bio_driver_info, bio, NULL);
950                 /*
951                  * If there are more than one iod on this mount, then defect
952                  * so that the iods can be shared out fairly between the mounts
953                  */
954                 if (nfs_defect && nmp->nm_bioqiods > 1) {
955                     NFS_DPF(ASYNCIO,
956                             ("nfssvc_iod: iod %d defecting from mount %p\n",
957                              myiod, nmp));
958                     nfs_iodmount[myiod] = NULL;
959                     nmp->nm_bioqiods--;
960                     break;
961                 }
962             }
963         }
964 }
965
966
967 /*
968  * Get an authorization string for the uid by having the mount_nfs sitting
969  * on this mount point porpous out of the kernel and do it.
970  */
971 int
972 nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep,
973             struct ucred *cred, char **auth_str, int *auth_len, char *verf_str,
974             int *verf_len, NFSKERBKEY_T key /* return session key */)
975 {
976         int error = 0;
977
978         while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
979                 nmp->nm_state |= NFSSTA_WANTAUTH;
980                 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
981                         "nfsauth1", 2 * hz);
982                 error = nfs_sigintr(nmp, rep, rep->r_td);
983                 if (error) {
984                         nmp->nm_state &= ~NFSSTA_WANTAUTH;
985                         return (error);
986                 }
987         }
988         nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
989         nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
990         nmp->nm_authlen = RPCAUTH_MAXSIZ;
991         nmp->nm_verfstr = verf_str;
992         nmp->nm_verflen = *verf_len;
993         nmp->nm_authuid = cred->cr_uid;
994         wakeup((caddr_t)&nmp->nm_authstr);
995
996         /*
997          * And wait for mount_nfs to do its stuff.
998          */
999         while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1000                 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
1001                         "nfsauth2", 2 * hz);
1002                 error = nfs_sigintr(nmp, rep, rep->r_td);
1003         }
1004         if (nmp->nm_state & NFSSTA_AUTHERR) {
1005                 nmp->nm_state &= ~NFSSTA_AUTHERR;
1006                 error = EAUTH;
1007         }
1008         if (error)
1009                 kfree((caddr_t)*auth_str, M_TEMP);
1010         else {
1011                 *auth_len = nmp->nm_authlen;
1012                 *verf_len = nmp->nm_verflen;
1013                 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1014         }
1015         nmp->nm_state &= ~NFSSTA_HASAUTH;
1016         nmp->nm_state |= NFSSTA_WAITAUTH;
1017         if (nmp->nm_state & NFSSTA_WANTAUTH) {
1018                 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1019                 wakeup((caddr_t)&nmp->nm_authtype);
1020         }
1021         return (error);
1022 }
1023
1024 /*
1025  * Get a nickname authenticator and verifier.
1026  */
1027 int
1028 nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str,
1029                 int *auth_len, char *verf_str, int verf_len)
1030 {
1031         struct nfsuid *nuidp;
1032         u_int32_t *nickp, *verfp;
1033         struct timeval ktvin, ktvout;
1034
1035 #ifdef DIAGNOSTIC
1036         if (verf_len < (4 * NFSX_UNSIGNED))
1037                 panic("nfs_getnickauth verf too small");
1038 #endif
1039         for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1040             nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1041                 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1042                         break;
1043         }
1044         if (!nuidp || nuidp->nu_expire < time_second)
1045                 return (EACCES);
1046
1047         /*
1048          * Move to the end of the lru list (end of lru == most recently used).
1049          */
1050         TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1051         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1052
1053         nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1054         *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1055         *nickp = txdr_unsigned(nuidp->nu_nickname);
1056         *auth_str = (char *)nickp;
1057         *auth_len = 2 * NFSX_UNSIGNED;
1058
1059         /*
1060          * Now we must encrypt the verifier and package it up.
1061          */
1062         verfp = (u_int32_t *)verf_str;
1063         *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1064         if (time_second > nuidp->nu_timestamp.tv_sec ||
1065             (time_second == nuidp->nu_timestamp.tv_sec &&
1066              time_second > nuidp->nu_timestamp.tv_usec))
1067                 getmicrotime(&nuidp->nu_timestamp);
1068         else
1069                 nuidp->nu_timestamp.tv_usec++;
1070         ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1071         ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1072
1073         /*
1074          * Now encrypt the timestamp verifier in ecb mode using the session
1075          * key.
1076          */
1077 #ifdef NFSKERB
1078         XXX
1079 #endif
1080
1081         *verfp++ = ktvout.tv_sec;
1082         *verfp++ = ktvout.tv_usec;
1083         *verfp = 0;
1084         return (0);
1085 }
1086
1087 /*
1088  * Save the current nickname in a hash list entry on the mount point.
1089  */
1090 int
1091 nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len,
1092                  NFSKERBKEY_T key, struct mbuf **mdp, char **dposp,
1093                  struct mbuf *mrep)
1094 {
1095         struct nfsuid *nuidp;
1096         u_int32_t *tl;
1097         int32_t t1;
1098         struct mbuf *md = *mdp;
1099         struct timeval ktvin, ktvout;
1100         u_int32_t nick;
1101         char *dpos = *dposp, *cp2;
1102         int deltasec, error = 0;
1103
1104         if (len == (3 * NFSX_UNSIGNED)) {
1105                 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1106                 ktvin.tv_sec = *tl++;
1107                 ktvin.tv_usec = *tl++;
1108                 nick = fxdr_unsigned(u_int32_t, *tl);
1109
1110                 /*
1111                  * Decrypt the timestamp in ecb mode.
1112                  */
1113 #ifdef NFSKERB
1114                 XXX
1115 #endif
1116                 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1117                 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1118                 deltasec = time_second - ktvout.tv_sec;
1119                 if (deltasec < 0)
1120                         deltasec = -deltasec;
1121                 /*
1122                  * If ok, add it to the hash list for the mount point.
1123                  */
1124                 if (deltasec <= NFS_KERBCLOCKSKEW) {
1125                         if (nmp->nm_numuids < nuidhash_max) {
1126                                 nmp->nm_numuids++;
1127                                 nuidp = (struct nfsuid *)
1128                                    kmalloc(sizeof (struct nfsuid), M_NFSUID,
1129                                         M_WAITOK);
1130                         } else {
1131                                 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1132                                 LIST_REMOVE(nuidp, nu_hash);
1133                                 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1134                                         nu_lru);
1135                         }
1136                         nuidp->nu_flag = 0;
1137                         nuidp->nu_cr.cr_uid = cred->cr_uid;
1138                         nuidp->nu_expire = time_second + NFS_KERBTTL;
1139                         nuidp->nu_timestamp = ktvout;
1140                         nuidp->nu_nickname = nick;
1141                         bcopy(key, nuidp->nu_key, sizeof (key));
1142                         TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1143                                 nu_lru);
1144                         LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1145                                 nuidp, nu_hash);
1146                 }
1147         } else
1148                 nfsm_adv(nfsm_rndup(len));
1149 nfsmout:
1150         *mdp = md;
1151         *dposp = dpos;
1152         return (error);
1153 }