1 /* $OpenBSD: nfs_syscalls.c,v 1.44 2005/04/01 02:54:57 tedu Exp $ */
2 /* $NetBSD: nfs_syscalls.c,v 1.19 1996/02/18 11:53:52 fvdl Exp $ */
3
4 /*
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Rick Macklem at The University of Guelph.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/file.h>
42 #include <sys/stat.h>
43 #include <sys/vnode.h>
44 #include <sys/mount.h>
45 #include <sys/proc.h>
46 #include <sys/uio.h>
47 #include <sys/malloc.h>
48 #include <sys/buf.h>
49 #include <sys/mbuf.h>
50 #include <sys/socket.h>
51 #include <sys/socketvar.h>
52 #include <sys/domain.h>
53 #include <sys/protosw.h>
54 #include <sys/namei.h>
55 #include <sys/syslog.h>
56 #include <sys/filedesc.h>
57 #include <sys/signalvar.h>
58 #include <sys/kthread.h>
59
60 #include <sys/syscallargs.h>
61
62 #include <netinet/in.h>
63 #include <netinet/tcp.h>
64 #include <nfs/xdr_subs.h>
65 #include <nfs/rpcv2.h>
66 #include <nfs/nfsproto.h>
67 #include <nfs/nfs.h>
68 #include <nfs/nfsm_subs.h>
69 #include <nfs/nfsrvcache.h>
70 #include <nfs/nfsmount.h>
71 #include <nfs/nfsnode.h>
72 #include <nfs/nfsrtt.h>
73 #include <nfs/nfs_var.h>
74
75 void nfsrv_zapsock(struct nfssvc_sock *);
76
77 /* Global defs. */
78 extern int32_t (*nfsrv3_procs[NFS_NPROCS])(struct nfsrv_descript *,
79 struct nfssvc_sock *,
80 struct proc *, struct mbuf **);
81 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
82 extern int nfs_numasync;
83 extern int nfsrtton;
84 extern struct nfsstats nfsstats;
85 extern int nfsrvw_procrastinate;
86 struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock;
87 int nuidhash_max = NFS_MAXUIDHASH;
88 int nfsd_waiting = 0;
89 #ifdef NFSSERVER
90 static int nfs_numnfsd = 0;
91 static struct nfsdrt nfsdrt;
92 #endif
93
94 struct nfssvc_sockhead nfssvc_sockhead;
95 struct nfsdhead nfsd_head;
96
97 int nfssvc_sockhead_flag;
98 int nfsd_head_flag;
99
100 #define TRUE 1
101 #define FALSE 0
102
103 #ifdef NFSCLIENT
104 struct proc *nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
105 int nfs_niothreads = -1;
106 #endif
107
108 #ifdef NFSSERVER
109 static void nfsd_rt(int, struct nfsrv_descript *, int);
110 #endif
111
112 int nfs_clientd(struct nfsmount *nmp, struct ucred *cred,
113 struct nfsd_cargs *ncd, int flag, caddr_t argp, struct proc *p);
114
115 /*
116 * Nfs client helper daemon.
117 * It also get authorization strings for "kerb" mounts.
118 * It must start at the beginning of the list again after any potential
119 * "sleep" since nfs_reclaim() called from vclean() can pull a node off
120 * the list asynchronously.
121 */
122 int
nfs_clientd(struct nfsmount * nmp,struct ucred * cred,struct nfsd_cargs * ncd,int flag,caddr_t argp,struct proc * p)123 nfs_clientd(struct nfsmount *nmp, struct ucred *cred, struct nfsd_cargs *ncd,
124 int flag, caddr_t argp, struct proc *p)
125 {
126 struct nfsuid *nuidp, *nnuidp;
127 int error = 0;
128
129 /*
130 * First initialize some variables
131 */
132
133 /*
134 * If an authorization string is being passed in, get it.
135 */
136 if ((flag & NFSSVC_GOTAUTH) &&
137 (nmp->nm_flag & (NFSMNT_WAITAUTH | NFSMNT_DISMNT)) == 0) {
138 if (nmp->nm_flag & NFSMNT_HASAUTH)
139 panic("cld kerb");
140 if ((flag & NFSSVC_AUTHINFAIL) == 0) {
141 if (ncd->ncd_authlen <= nmp->nm_authlen &&
142 ncd->ncd_verflen <= nmp->nm_verflen &&
143 !copyin(ncd->ncd_authstr,nmp->nm_authstr,ncd->ncd_authlen)&&
144 !copyin(ncd->ncd_verfstr,nmp->nm_verfstr,ncd->ncd_verflen)){
145 nmp->nm_authtype = ncd->ncd_authtype;
146 nmp->nm_authlen = ncd->ncd_authlen;
147 nmp->nm_verflen = ncd->ncd_verflen;
148 } else
149 nmp->nm_flag |= NFSMNT_AUTHERR;
150 } else
151 nmp->nm_flag |= NFSMNT_AUTHERR;
152 nmp->nm_flag |= NFSMNT_HASAUTH;
153 wakeup((caddr_t)&nmp->nm_authlen);
154 } else
155 nmp->nm_flag |= NFSMNT_WAITAUTH;
156
157 /*
158 * Loop every second updating queue until there is a termination sig.
159 */
160 while ((nmp->nm_flag & NFSMNT_DISMNT) == 0) {
161 /*
162 * Get an authorization string, if required.
163 */
164 if ((nmp->nm_flag & (NFSMNT_WAITAUTH | NFSMNT_DISMNT | NFSMNT_HASAUTH)) == 0) {
165 ncd->ncd_authuid = nmp->nm_authuid;
166 if (copyout((caddr_t)ncd, argp, sizeof (struct nfsd_cargs)))
167 nmp->nm_flag |= NFSMNT_WAITAUTH;
168 else
169 return (ENEEDAUTH);
170 }
171
172 /*
173 * Wait a bit (no pun) and do it again.
174 */
175 if ((nmp->nm_flag & NFSMNT_DISMNT) == 0 &&
176 (nmp->nm_flag & (NFSMNT_WAITAUTH | NFSMNT_HASAUTH))) {
177 error = tsleep((caddr_t)&nmp->nm_authstr, PSOCK | PCATCH,
178 "nqnfstimr", hz / 3);
179 if (error == EINTR || error == ERESTART) {
180 if (vfs_busy(nmp->nm_mountp, LK_EXCLUSIVE, NULL, p) == 0)
181 dounmount(nmp->nm_mountp, MNT_FORCE, p, NULL);
182 }
183 }
184 }
185
186 /*
187 * Finally, we can free up the mount structure.
188 */
189 for (nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); nuidp != NULL;
190 nuidp = nnuidp) {
191 nnuidp = TAILQ_NEXT(nuidp, nu_lru);
192 LIST_REMOVE(nuidp, nu_hash);
193 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
194 free((caddr_t)nuidp, M_NFSUID);
195 }
196 free((caddr_t)nmp, M_NFSMNT);
197 if (error == EWOULDBLOCK)
198 error = 0;
199 return (error);
200 }
201
202
203 /*
204 * NFS server system calls
205 */
206
207 /*
208 * Nfs server pseudo system call for the nfsd's
209 * Based on the flag value it either:
210 * - adds a socket to the selection list
211 * - remains in the kernel as an nfsd
212 * - remains in the kernel as an nfsiod
213 */
214 int
sys_nfssvc(p,v,retval)215 sys_nfssvc(p, v, retval)
216 struct proc *p;
217 void *v;
218 register_t *retval;
219 {
220 struct sys_nfssvc_args /* {
221 syscallarg(int) flag;
222 syscallarg(caddr_t) argp;
223 } */ *uap = v;
224 #ifdef NFSCLIENT
225 struct nameidata nd;
226 struct nfsmount *nmp;
227 struct nfsd_cargs ncd;
228 #endif
229 int error;
230 #ifdef NFSSERVER
231 struct file *fp;
232 struct mbuf *nam;
233 struct nfsd_args nfsdarg;
234 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
235 struct nfsd *nfsd;
236 struct nfssvc_sock *slp;
237 struct nfsuid *nuidp;
238 #endif
239
240 /*
241 * Must be super user
242 */
243 error = suser(p, 0);
244 if(error)
245 return (error);
246 while (nfssvc_sockhead_flag & SLP_INIT) {
247 nfssvc_sockhead_flag |= SLP_WANTINIT;
248 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
249 }
250 if (SCARG(uap, flag) & NFSSVC_BIOD) {
251 error = ENOSYS;
252 } else if (SCARG(uap, flag) & NFSSVC_MNTD) {
253 #ifndef NFSCLIENT
254 error = ENOSYS;
255 #else
256 error = copyin(SCARG(uap, argp), (caddr_t)&ncd, sizeof (ncd));
257 if (error)
258 return (error);
259 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
260 ncd.ncd_dirp, p);
261 error = namei(&nd);
262 if (error)
263 return (error);
264 if ((nd.ni_vp->v_flag & VROOT) == 0)
265 error = EINVAL;
266 nmp = VFSTONFS(nd.ni_vp->v_mount);
267 vput(nd.ni_vp);
268 if (error)
269 return (error);
270 if ((nmp->nm_flag & NFSMNT_MNTD) &&
271 (SCARG(uap, flag) & NFSSVC_GOTAUTH) == 0)
272 return (0);
273 nmp->nm_flag |= NFSMNT_MNTD;
274 error = nfs_clientd(nmp, p->p_ucred, &ncd, SCARG(uap, flag),
275 SCARG(uap, argp), p);
276 #endif /* NFSCLIENT */
277 } else if (SCARG(uap, flag) & NFSSVC_ADDSOCK) {
278 #ifndef NFSSERVER
279 error = ENOSYS;
280 #else
281 error = copyin(SCARG(uap, argp), (caddr_t)&nfsdarg,
282 sizeof(nfsdarg));
283 if (error)
284 return (error);
285 error = getsock(p->p_fd, nfsdarg.sock, &fp);
286 if (error)
287 return (error);
288 /*
289 * Get the client address for connected sockets.
290 */
291 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
292 nam = (struct mbuf *)0;
293 else {
294 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen,
295 MT_SONAME);
296 if (error) {
297 FRELE(fp);
298 return (error);
299 }
300 }
301 error = nfssvc_addsock(fp, nam);
302 FRELE(fp);
303 #endif /* !NFSSERVER */
304 } else {
305 #ifndef NFSSERVER
306 error = ENOSYS;
307 #else
308 error = copyin(SCARG(uap, argp), (caddr_t)nsd, sizeof (*nsd));
309 if (error)
310 return (error);
311 if ((SCARG(uap, flag) & NFSSVC_AUTHIN) &&
312 ((nfsd = nsd->nsd_nfsd)) != NULL &&
313 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
314 slp = nfsd->nfsd_slp;
315
316 /*
317 * First check to see if another nfsd has already
318 * added this credential.
319 */
320 LIST_FOREACH(nuidp, NUIDHASH(slp,nsd->nsd_cr.cr_uid),
321 nu_hash) {
322 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
323 (!nfsd->nfsd_nd->nd_nam2 ||
324 netaddr_match(NU_NETFAM(nuidp),
325 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
326 break;
327 }
328 if (nuidp) {
329 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
330 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
331 } else {
332 /*
333 * Nope, so we will.
334 */
335 if (slp->ns_numuids < nuidhash_max) {
336 slp->ns_numuids++;
337 nuidp = (struct nfsuid *)
338 malloc(sizeof (struct nfsuid), M_NFSUID,
339 M_WAITOK);
340 } else
341 nuidp = (struct nfsuid *)0;
342 if ((slp->ns_flag & SLP_VALID) == 0) {
343 if (nuidp)
344 free((caddr_t)nuidp, M_NFSUID);
345 } else {
346 if (nuidp == (struct nfsuid *)0) {
347 nuidp = TAILQ_FIRST(&slp->ns_uidlruhead);
348 LIST_REMOVE(nuidp, nu_hash);
349 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
350 nu_lru);
351 if (nuidp->nu_flag & NU_NAM)
352 m_freem(nuidp->nu_nam);
353 }
354 nuidp->nu_flag = 0;
355 nuidp->nu_cr = nsd->nsd_cr;
356 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
357 nuidp->nu_cr.cr_ngroups = NGROUPS;
358 nuidp->nu_cr.cr_ref = 1;
359 nuidp->nu_timestamp = nsd->nsd_timestamp;
360 nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl;
361 /*
362 * and save the session key in nu_key.
363 */
364 bcopy(nsd->nsd_key, nuidp->nu_key,
365 sizeof (nsd->nsd_key));
366 if (nfsd->nfsd_nd->nd_nam2) {
367 struct sockaddr_in *saddr;
368
369 saddr = mtod(nfsd->nfsd_nd->nd_nam2,
370 struct sockaddr_in *);
371 switch (saddr->sin_family) {
372 case AF_INET:
373 nuidp->nu_flag |= NU_INETADDR;
374 nuidp->nu_inetaddr =
375 saddr->sin_addr.s_addr;
376 break;
377 default:
378 nuidp->nu_flag |= NU_NAM;
379 nuidp->nu_nam = m_copym(
380 nfsd->nfsd_nd->nd_nam2, 0,
381 M_COPYALL, M_WAIT);
382 break;
383 };
384 }
385 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
386 nu_lru);
387 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
388 nuidp, nu_hash);
389 nfsrv_setcred(&nuidp->nu_cr,
390 &nfsd->nfsd_nd->nd_cr);
391 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
392 }
393 }
394 }
395 if ((SCARG(uap, flag) & NFSSVC_AUTHINFAIL) &&
396 (nfsd = nsd->nsd_nfsd))
397 nfsd->nfsd_flag |= NFSD_AUTHFAIL;
398 error = nfssvc_nfsd(nsd, SCARG(uap, argp), p);
399 #endif /* !NFSSERVER */
400 }
401 if (error == EINTR || error == ERESTART)
402 error = 0;
403 return (error);
404 }
405
406 #ifdef NFSSERVER
407 /*
408 * Adds a socket to the list for servicing by nfsds.
409 */
410 int
nfssvc_addsock(fp,mynam)411 nfssvc_addsock(fp, mynam)
412 struct file *fp;
413 struct mbuf *mynam;
414 {
415 struct mbuf *m;
416 int siz;
417 struct nfssvc_sock *slp;
418 struct socket *so;
419 struct nfssvc_sock *tslp;
420 int error, s;
421
422 so = (struct socket *)fp->f_data;
423 tslp = (struct nfssvc_sock *)0;
424 /*
425 * Add it to the list, as required.
426 */
427 if (so->so_proto->pr_protocol == IPPROTO_UDP) {
428 tslp = nfs_udpsock;
429 if (tslp->ns_flag & SLP_VALID) {
430 m_freem(mynam);
431 return (EPERM);
432 }
433 }
434 if (so->so_type == SOCK_STREAM)
435 siz = NFS_MAXPACKET + sizeof (u_long);
436 else
437 siz = NFS_MAXPACKET;
438 error = soreserve(so, siz, siz);
439 if (error) {
440 m_freem(mynam);
441 return (error);
442 }
443
444 /*
445 * Set protocol specific options { for now TCP only } and
446 * reserve some space. For datagram sockets, this can get called
447 * repeatedly for the same socket, but that isn't harmful.
448 */
449 if (so->so_type == SOCK_STREAM) {
450 MGET(m, M_WAIT, MT_SOOPTS);
451 *mtod(m, int32_t *) = 1;
452 m->m_len = sizeof(int32_t);
453 sosetopt(so, SOL_SOCKET, SO_KEEPALIVE, m);
454 }
455 if (so->so_proto->pr_domain->dom_family == AF_INET &&
456 so->so_proto->pr_protocol == IPPROTO_TCP) {
457 MGET(m, M_WAIT, MT_SOOPTS);
458 *mtod(m, int32_t *) = 1;
459 m->m_len = sizeof(int32_t);
460 sosetopt(so, IPPROTO_TCP, TCP_NODELAY, m);
461 }
462 so->so_rcv.sb_flags &= ~SB_NOINTR;
463 so->so_rcv.sb_timeo = 0;
464 so->so_snd.sb_flags &= ~SB_NOINTR;
465 so->so_snd.sb_timeo = 0;
466 if (tslp)
467 slp = tslp;
468 else {
469 slp = (struct nfssvc_sock *)
470 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
471 bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
472 TAILQ_INIT(&slp->ns_uidlruhead);
473 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
474 }
475 slp->ns_so = so;
476 slp->ns_nam = mynam;
477 fp->f_count++;
478 slp->ns_fp = fp;
479 s = splsoftnet();
480 so->so_upcallarg = (caddr_t)slp;
481 so->so_upcall = nfsrv_rcv;
482 slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
483 nfsrv_wakenfsd(slp);
484 splx(s);
485 return (0);
486 }
487
488 /*
489 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
490 * until it is killed by a signal.
491 */
492 int
nfssvc_nfsd(nsd,argp,p)493 nfssvc_nfsd(nsd, argp, p)
494 struct nfsd_srvargs *nsd;
495 caddr_t argp;
496 struct proc *p;
497 {
498 struct mbuf *m;
499 int siz;
500 struct nfssvc_sock *slp;
501 struct socket *so;
502 int *solockp;
503 struct nfsd *nfsd = nsd->nsd_nfsd;
504 struct nfsrv_descript *nd = NULL;
505 struct mbuf *mreq;
506 int error = 0, cacherep, s, sotype, writes_todo;
507 u_quad_t cur_usec;
508
509 #ifndef nolint
510 cacherep = RC_DOIT;
511 writes_todo = 0;
512 #endif
513 s = splsoftnet();
514 if (nfsd == (struct nfsd *)0) {
515 nsd->nsd_nfsd = nfsd = (struct nfsd *)
516 malloc(sizeof (struct nfsd), M_NFSD, M_WAITOK);
517 bzero((caddr_t)nfsd, sizeof (struct nfsd));
518 nfsd->nfsd_procp = p;
519 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
520 nfs_numnfsd++;
521 }
522 PHOLD(p);
523 /*
524 * Loop getting rpc requests until SIGKILL.
525 */
526 for (;;) {
527 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
528 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
529 (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
530 nfsd->nfsd_flag |= NFSD_WAITING;
531 nfsd_waiting++;
532 error = tsleep((caddr_t)nfsd, PSOCK | PCATCH,
533 "nfsd", 0);
534 nfsd_waiting--;
535 if (error)
536 goto done;
537 }
538 if (nfsd->nfsd_slp == NULL &&
539 (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
540 for (slp = TAILQ_FIRST(&nfssvc_sockhead);
541 slp != 0; slp = TAILQ_NEXT(slp, ns_chain)) {
542 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
543 == (SLP_VALID | SLP_DOREC)) {
544 slp->ns_flag &= ~SLP_DOREC;
545 slp->ns_sref++;
546 nfsd->nfsd_slp = slp;
547 break;
548 }
549 }
550 if (slp == 0)
551 nfsd_head_flag &= ~NFSD_CHECKSLP;
552 }
553 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
554 continue;
555 if (slp->ns_flag & SLP_VALID) {
556 if (slp->ns_flag & SLP_DISCONN)
557 nfsrv_zapsock(slp);
558 else if (slp->ns_flag & SLP_NEEDQ) {
559 slp->ns_flag &= ~SLP_NEEDQ;
560 (void) nfs_sndlock(&slp->ns_solock,
561 (struct nfsreq *)0);
562 nfsrv_rcv(slp->ns_so, (caddr_t)slp,
563 M_WAIT);
564 nfs_sndunlock(&slp->ns_solock);
565 }
566 error = nfsrv_dorec(slp, nfsd, &nd);
567 cur_usec = (u_quad_t)time.tv_sec * 1000000 +
568 (u_quad_t)time.tv_usec;
569 if (error && LIST_FIRST(&slp->ns_tq) &&
570 LIST_FIRST(&slp->ns_tq)->nd_time
571 <= cur_usec) {
572 error = 0;
573 cacherep = RC_DOIT;
574 writes_todo = 1;
575 } else
576 writes_todo = 0;
577 nfsd->nfsd_flag |= NFSD_REQINPROG;
578 }
579 } else {
580 error = 0;
581 slp = nfsd->nfsd_slp;
582 }
583 if (error || (slp->ns_flag & SLP_VALID) == 0) {
584 if (nd) {
585 free((caddr_t)nd, M_NFSRVDESC);
586 nd = NULL;
587 }
588 nfsd->nfsd_slp = (struct nfssvc_sock *)0;
589 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
590 nfsrv_slpderef(slp);
591 continue;
592 }
593 splx(s);
594 so = slp->ns_so;
595 sotype = so->so_type;
596 if (so->so_proto->pr_flags & PR_CONNREQUIRED)
597 solockp = &slp->ns_solock;
598 else
599 solockp = (int *)0;
600 if (nd) {
601 nd->nd_starttime = time;
602 if (nd->nd_nam2)
603 nd->nd_nam = nd->nd_nam2;
604 else
605 nd->nd_nam = slp->ns_nam;
606
607 /*
608 * Check to see if authorization is needed.
609 */
610 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
611 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
612 nsd->nsd_haddr = mtod(nd->nd_nam,
613 struct sockaddr_in *)->sin_addr.s_addr;
614 nsd->nsd_authlen = nfsd->nfsd_authlen;
615 nsd->nsd_verflen = nfsd->nfsd_verflen;
616 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
617 nfsd->nfsd_authlen) &&
618 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
619 nfsd->nfsd_verflen) &&
620 !copyout((caddr_t)nsd, argp, sizeof (*nsd))) {
621 PRELE(p);
622 return (ENEEDAUTH);
623 }
624 cacherep = RC_DROPIT;
625 } else
626 cacherep = nfsrv_getcache(nd, slp, &mreq);
627
628 if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
629 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
630 nd->nd_procnum = NFSPROC_NOOP;
631 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
632 cacherep = RC_DOIT;
633 }
634 }
635
636 /*
637 * Loop to get all the write rpc relies that have been
638 * gathered together.
639 */
640 do {
641 switch (cacherep) {
642 case RC_DOIT:
643 if (writes_todo || (!(nd->nd_flag & ND_NFSV3) &&
644 nd->nd_procnum == NFSPROC_WRITE &&
645 nfsrvw_procrastinate > 0))
646 error = nfsrv_writegather(&nd, slp,
647 nfsd->nfsd_procp, &mreq);
648 else
649 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
650 slp, nfsd->nfsd_procp, &mreq);
651 if (mreq == NULL)
652 break;
653 if (error) {
654 nfsstats.srv_errs++;
655 nfsrv_updatecache(nd, FALSE, mreq);
656 if (nd->nd_nam2)
657 m_freem(nd->nd_nam2);
658 break;
659 }
660 nfsstats.srvrpccnt[nd->nd_procnum]++;
661 nfsrv_updatecache(nd, TRUE, mreq);
662 nd->nd_mrep = (struct mbuf *)0;
663 case RC_REPLY:
664 m = mreq;
665 siz = 0;
666 while (m) {
667 siz += m->m_len;
668 m = m->m_next;
669 }
670 if (siz <= 0 || siz > NFS_MAXPACKET) {
671 printf("mbuf siz=%d\n",siz);
672 panic("Bad nfs svc reply");
673 }
674 m = mreq;
675 m->m_pkthdr.len = siz;
676 m->m_pkthdr.rcvif = (struct ifnet *)0;
677 /*
678 * For stream protocols, prepend a Sun RPC
679 * Record Mark.
680 */
681 if (sotype == SOCK_STREAM) {
682 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
683 *mtod(m, u_int32_t *) = htonl(0x80000000 | siz);
684 }
685 if (solockp)
686 (void) nfs_sndlock(solockp, (struct nfsreq *)0);
687 if (slp->ns_flag & SLP_VALID)
688 error = nfs_send(so, nd->nd_nam2, m, NULL);
689 else {
690 error = EPIPE;
691 m_freem(m);
692 }
693 if (nfsrtton)
694 nfsd_rt(sotype, nd, cacherep);
695 if (nd->nd_nam2)
696 MFREE(nd->nd_nam2, m);
697 if (nd->nd_mrep)
698 m_freem(nd->nd_mrep);
699 if (error == EPIPE)
700 nfsrv_zapsock(slp);
701 if (solockp)
702 nfs_sndunlock(solockp);
703 if (error == EINTR || error == ERESTART) {
704 free((caddr_t)nd, M_NFSRVDESC);
705 nfsrv_slpderef(slp);
706 s = splsoftnet();
707 goto done;
708 }
709 break;
710 case RC_DROPIT:
711 if (nfsrtton)
712 nfsd_rt(sotype, nd, cacherep);
713 m_freem(nd->nd_mrep);
714 m_freem(nd->nd_nam2);
715 break;
716 };
717 if (nd) {
718 FREE((caddr_t)nd, M_NFSRVDESC);
719 nd = NULL;
720 }
721
722 /*
723 * Check to see if there are outstanding writes that
724 * need to be serviced.
725 */
726 cur_usec = (u_quad_t)time.tv_sec * 1000000 +
727 (u_quad_t)time.tv_usec;
728 s = splsoftclock();
729 if (LIST_FIRST(&slp->ns_tq) &&
730 LIST_FIRST(&slp->ns_tq)->nd_time <= cur_usec) {
731 cacherep = RC_DOIT;
732 writes_todo = 1;
733 } else
734 writes_todo = 0;
735 splx(s);
736 } while (writes_todo);
737 s = splsoftnet();
738 if (nfsrv_dorec(slp, nfsd, &nd)) {
739 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
740 nfsd->nfsd_slp = NULL;
741 nfsrv_slpderef(slp);
742 }
743 }
744 done:
745 PRELE(p);
746 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
747 splx(s);
748 free((caddr_t)nfsd, M_NFSD);
749 nsd->nsd_nfsd = (struct nfsd *)0;
750 if (--nfs_numnfsd == 0)
751 nfsrv_init(TRUE); /* Reinitialize everything */
752 return (error);
753 }
754
755 /*
756 * Shut down a socket associated with an nfssvc_sock structure.
757 * Should be called with the send lock set, if required.
758 * The trick here is to increment the sref at the start, so that the nfsds
759 * will stop using it and clear ns_flag at the end so that it will not be
760 * reassigned during cleanup.
761 */
762 void
nfsrv_zapsock(slp)763 nfsrv_zapsock(slp)
764 struct nfssvc_sock *slp;
765 {
766 struct nfsuid *nuidp, *nnuidp;
767 struct nfsrv_descript *nwp, *nnwp;
768 struct socket *so;
769 struct file *fp;
770 struct mbuf *m;
771 int s;
772
773 slp->ns_flag &= ~SLP_ALLFLAGS;
774 fp = slp->ns_fp;
775 if (fp) {
776 FREF(fp);
777 slp->ns_fp = NULL;
778 so = slp->ns_so;
779 so->so_upcall = NULL;
780 soshutdown(so, 2);
781 closef(fp, NULL);
782 if (slp->ns_nam)
783 MFREE(slp->ns_nam, m);
784 m_freem(slp->ns_raw);
785 m_freem(slp->ns_rec);
786 for (nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); nuidp != NULL;
787 nuidp = nnuidp) {
788 nnuidp = TAILQ_NEXT(nuidp, nu_lru);
789 LIST_REMOVE(nuidp, nu_hash);
790 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
791 if (nuidp->nu_flag & NU_NAM)
792 m_freem(nuidp->nu_nam);
793 free((caddr_t)nuidp, M_NFSUID);
794 }
795 s = splsoftclock();
796 for (nwp = LIST_FIRST(&slp->ns_tq); nwp != NULL; nwp = nnwp) {
797 nnwp = LIST_NEXT(nwp, nd_tq);
798 LIST_REMOVE(nwp, nd_tq);
799 free((caddr_t)nwp, M_NFSRVDESC);
800 }
801 LIST_INIT(&slp->ns_tq);
802 splx(s);
803 }
804 }
805
806 /*
807 * Derefence a server socket structure. If it has no more references and
808 * is no longer valid, you can throw it away.
809 */
810 void
nfsrv_slpderef(slp)811 nfsrv_slpderef(slp)
812 struct nfssvc_sock *slp;
813 {
814 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
815 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
816 free((caddr_t)slp, M_NFSSVC);
817 }
818 }
819
820 /*
821 * Initialize the data structures for the server.
822 * Handshake with any new nfsds starting up to avoid any chance of
823 * corruption.
824 */
825 void
nfsrv_init(terminating)826 nfsrv_init(terminating)
827 int terminating;
828 {
829 struct nfssvc_sock *slp, *nslp;
830
831 if (nfssvc_sockhead_flag & SLP_INIT)
832 panic("nfsd init");
833 nfssvc_sockhead_flag |= SLP_INIT;
834 if (terminating) {
835 for (slp = TAILQ_FIRST(&nfssvc_sockhead); slp != NULL;
836 slp = nslp) {
837 nslp = TAILQ_NEXT(slp, ns_chain);
838 if (slp->ns_flag & SLP_VALID)
839 nfsrv_zapsock(slp);
840 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
841 free((caddr_t)slp, M_NFSSVC);
842 }
843 nfsrv_cleancache(); /* And clear out server cache */
844 }
845
846 TAILQ_INIT(&nfssvc_sockhead);
847 nfssvc_sockhead_flag &= ~SLP_INIT;
848 if (nfssvc_sockhead_flag & SLP_WANTINIT) {
849 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
850 wakeup((caddr_t)&nfssvc_sockhead);
851 }
852
853 TAILQ_INIT(&nfsd_head);
854 nfsd_head_flag &= ~NFSD_CHECKSLP;
855
856 nfs_udpsock = (struct nfssvc_sock *)
857 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
858 bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
859 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
860 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
861
862 nfs_cltpsock = (struct nfssvc_sock *)
863 malloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK);
864 bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
865 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
866 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
867 }
868
869 /*
870 * Add entries to the server monitor log.
871 */
872 static void
nfsd_rt(sotype,nd,cacherep)873 nfsd_rt(sotype, nd, cacherep)
874 int sotype;
875 struct nfsrv_descript *nd;
876 int cacherep;
877 {
878 struct drt *rt;
879
880 rt = &nfsdrt.drt[nfsdrt.pos];
881 if (cacherep == RC_DOIT)
882 rt->flag = 0;
883 else if (cacherep == RC_REPLY)
884 rt->flag = DRT_CACHEREPLY;
885 else
886 rt->flag = DRT_CACHEDROP;
887 if (sotype == SOCK_STREAM)
888 rt->flag |= DRT_TCP;
889 else if (nd->nd_flag & ND_NFSV3)
890 rt->flag |= DRT_NFSV3;
891 rt->proc = nd->nd_procnum;
892 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET)
893 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr;
894 else
895 rt->ipadr = INADDR_ANY;
896 rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) +
897 (time.tv_usec - nd->nd_starttime.tv_usec);
898 rt->tstamp = time;
899 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
900 }
901 #endif /* NFSSERVER */
902
903 #ifdef NFSCLIENT
904 /*
905 * Asynchronous I/O threads for client nfs.
906 * They do read-ahead and write-behind operations on the block I/O cache.
907 * Never returns unless it fails or gets killed.
908 */
909 int
nfssvc_iod(p)910 nfssvc_iod(p)
911 struct proc *p;
912 {
913 struct buf *bp, *nbp;
914 int i, myiod;
915 struct vnode *vp;
916 int error = 0, s;
917
918 /*
919 * Assign my position or return error if too many already running
920 */
921 myiod = -1;
922 for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
923 if (nfs_asyncdaemon[i] == NULL) {
924 myiod = i;
925 break;
926 }
927 if (myiod == -1)
928 return (EBUSY);
929 nfs_asyncdaemon[myiod] = p;
930 nfs_numasync++;
931 PHOLD(p);
932 /*
933 * Just loop around doin our stuff until SIGKILL
934 */
935 for (;;) {
936 while (TAILQ_FIRST(&nfs_bufq) == NULL && error == 0) {
937 nfs_iodwant[myiod] = p;
938 error = tsleep((caddr_t)&nfs_iodwant[myiod],
939 PWAIT | PCATCH, "nfsidl", 0);
940 }
941 while ((bp = TAILQ_FIRST(&nfs_bufq)) != NULL) {
942 /* Take one off the front of the list */
943 TAILQ_REMOVE(&nfs_bufq, bp, b_freelist);
944 if (bp->b_flags & B_READ)
945 (void) nfs_doio(bp, NULL);
946 else do {
947 /*
948 * Look for a delayed write for the same vnode, so I can do
949 * it now. We must grab it before calling nfs_doio() to
950 * avoid any risk of the vnode getting vclean()'d while
951 * we are doing the write rpc.
952 */
953 vp = bp->b_vp;
954 s = splbio();
955 for (nbp = LIST_FIRST(&vp->v_dirtyblkhd); nbp != NULL;
956 nbp = LIST_NEXT(nbp, b_vnbufs)) {
957 if ((nbp->b_flags &
958 (B_BUSY|B_DELWRI|B_NEEDCOMMIT|B_NOCACHE))!=B_DELWRI)
959 continue;
960 bremfree(nbp);
961 nbp->b_flags |= (B_BUSY|B_ASYNC);
962 break;
963 }
964 /*
965 * For the delayed write, do the first part of nfs_bwrite()
966 * up to, but not including nfs_strategy().
967 */
968 if (nbp) {
969 nbp->b_flags &= ~(B_READ|B_DONE|B_ERROR);
970 buf_undirty(bp);
971 nbp->b_vp->v_numoutput++;
972 }
973 splx(s);
974
975 (void) nfs_doio(bp, NULL);
976 } while ((bp = nbp) != NULL);
977 }
978 if (error) {
979 PRELE(p);
980 nfs_asyncdaemon[myiod] = NULL;
981 nfs_numasync--;
982 return (error);
983 }
984 }
985 }
986
987 void
start_nfsio(arg)988 start_nfsio(arg)
989 void *arg;
990 {
991 nfssvc_iod(curproc);
992
993 kthread_exit(0);
994 }
995
996 void
nfs_getset_niothreads(set)997 nfs_getset_niothreads(set)
998 int set;
999 {
1000 int i, have, start;
1001
1002 for (have = 0, i = 0; i < NFS_MAXASYNCDAEMON; i++)
1003 if (nfs_asyncdaemon[i] != NULL)
1004 have++;
1005
1006 if (set) {
1007 /* clamp to sane range */
1008 nfs_niothreads = max(0, min(nfs_niothreads, NFS_MAXASYNCDAEMON));
1009
1010 start = nfs_niothreads - have;
1011
1012 while (start > 0) {
1013 kthread_create(start_nfsio, NULL, NULL, "nfsio");
1014 start--;
1015 }
1016
1017 for (i = 0; (start < 0) && (i < NFS_MAXASYNCDAEMON); i++)
1018 if (nfs_asyncdaemon[i] != NULL) {
1019 psignal(nfs_asyncdaemon[i], SIGKILL);
1020 start++;
1021 }
1022 } else {
1023 if (nfs_niothreads >= 0)
1024 nfs_niothreads = have;
1025 }
1026 }
1027
1028 /*
1029 * Get an authorization string for the uid by having the mount_nfs sitting
1030 * on this mount point porpous out of the kernel and do it.
1031 */
1032 int
nfs_getauth(nmp,rep,cred,auth_str,auth_len,verf_str,verf_len,key)1033 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
1034 struct nfsmount *nmp;
1035 struct nfsreq *rep;
1036 struct ucred *cred;
1037 char **auth_str;
1038 int *auth_len;
1039 char *verf_str;
1040 int *verf_len;
1041 NFSKERBKEY_T key; /* return session key */
1042 {
1043 int error = 0;
1044
1045 while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) {
1046 nmp->nm_flag |= NFSMNT_WANTAUTH;
1047 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK,
1048 "nfsauth1", 2 * hz);
1049 error = nfs_sigintr(nmp, rep, rep->r_procp);
1050 if (error) {
1051 nmp->nm_flag &= ~NFSMNT_WANTAUTH;
1052 return (error);
1053 }
1054 }
1055 nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH);
1056 nmp->nm_authstr = *auth_str = (char *)malloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1057 nmp->nm_authlen = RPCAUTH_MAXSIZ;
1058 nmp->nm_verfstr = verf_str;
1059 nmp->nm_verflen = *verf_len;
1060 nmp->nm_authuid = cred->cr_uid;
1061 wakeup((caddr_t)&nmp->nm_authstr);
1062
1063 /*
1064 * And wait for mount_nfs to do its stuff.
1065 */
1066 while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) {
1067 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK,
1068 "nfsauth2", 2 * hz);
1069 error = nfs_sigintr(nmp, rep, rep->r_procp);
1070 }
1071 if (nmp->nm_flag & NFSMNT_AUTHERR) {
1072 nmp->nm_flag &= ~NFSMNT_AUTHERR;
1073 error = EAUTH;
1074 }
1075 if (error)
1076 free((caddr_t)*auth_str, M_TEMP);
1077 else {
1078 *auth_len = nmp->nm_authlen;
1079 *verf_len = nmp->nm_verflen;
1080 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (NFSKERBKEY_T));
1081 }
1082 nmp->nm_flag &= ~NFSMNT_HASAUTH;
1083 nmp->nm_flag |= NFSMNT_WAITAUTH;
1084 if (nmp->nm_flag & NFSMNT_WANTAUTH) {
1085 nmp->nm_flag &= ~NFSMNT_WANTAUTH;
1086 wakeup((caddr_t)&nmp->nm_authtype);
1087 }
1088 return (error);
1089 }
1090
1091 /*
1092 * Get a nickname authenticator and verifier.
1093 */
1094 int
nfs_getnickauth(nmp,cred,auth_str,auth_len,verf_str,verf_len)1095 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
1096 struct nfsmount *nmp;
1097 struct ucred *cred;
1098 char **auth_str;
1099 int *auth_len;
1100 char *verf_str;
1101 int verf_len;
1102 {
1103 struct nfsuid *nuidp;
1104 u_int32_t *nickp, *verfp;
1105 struct timeval ktvin, ktvout;
1106
1107 #ifdef DIAGNOSTIC
1108 if (verf_len < (4 * NFSX_UNSIGNED))
1109 panic("nfs_getnickauth verf too small");
1110 #endif
1111 LIST_FOREACH(nuidp, NMUIDHASH(nmp, cred->cr_uid), nu_hash) {
1112 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1113 break;
1114 }
1115 if (!nuidp || nuidp->nu_expire < time.tv_sec)
1116 return (EACCES);
1117
1118 /*
1119 * Move to the end of the lru list (end of lru == most recently used).
1120 */
1121 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1122 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1123
1124 nickp = (u_int32_t *)malloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1125 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1126 *nickp = txdr_unsigned(nuidp->nu_nickname);
1127 *auth_str = (char *)nickp;
1128 *auth_len = 2 * NFSX_UNSIGNED;
1129
1130 /*
1131 * Now we must encrypt the verifier and package it up.
1132 */
1133 verfp = (u_int32_t *)verf_str;
1134 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1135 if (time.tv_sec > nuidp->nu_timestamp.tv_sec ||
1136 (time.tv_sec == nuidp->nu_timestamp.tv_sec &&
1137 time.tv_usec > nuidp->nu_timestamp.tv_usec))
1138 nuidp->nu_timestamp = time;
1139 else
1140 nuidp->nu_timestamp.tv_usec++;
1141 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1142 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1143
1144 *verfp++ = ktvout.tv_sec;
1145 *verfp++ = ktvout.tv_usec;
1146 *verfp = 0;
1147 return (0);
1148 }
1149
1150 /*
1151 * Save the current nickname in a hash list entry on the mount point.
1152 */
1153 int
nfs_savenickauth(nmp,cred,len,key,mdp,dposp,mrep)1154 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
1155 struct nfsmount *nmp;
1156 struct ucred *cred;
1157 int len;
1158 NFSKERBKEY_T key;
1159 struct mbuf **mdp;
1160 char **dposp;
1161 struct mbuf *mrep;
1162 {
1163 struct nfsuid *nuidp;
1164 u_int32_t *tl;
1165 int32_t t1;
1166 struct mbuf *md = *mdp;
1167 struct timeval ktvin, ktvout;
1168 u_int32_t nick;
1169 char *dpos = *dposp, *cp2;
1170 int deltasec, error = 0;
1171
1172 if (len == (3 * NFSX_UNSIGNED)) {
1173 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
1174 ktvin.tv_sec = *tl++;
1175 ktvin.tv_usec = *tl++;
1176 nick = fxdr_unsigned(u_int32_t, *tl);
1177
1178 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1179 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1180 deltasec = time.tv_sec - ktvout.tv_sec;
1181 if (deltasec < 0)
1182 deltasec = -deltasec;
1183 /*
1184 * If ok, add it to the hash list for the mount point.
1185 */
1186 if (deltasec <= NFS_KERBCLOCKSKEW) {
1187 if (nmp->nm_numuids < nuidhash_max) {
1188 nmp->nm_numuids++;
1189 nuidp = (struct nfsuid *)
1190 malloc(sizeof (struct nfsuid), M_NFSUID,
1191 M_WAITOK);
1192 } else {
1193 nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead);
1194 LIST_REMOVE(nuidp, nu_hash);
1195 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1196 nu_lru);
1197 }
1198 nuidp->nu_flag = 0;
1199 nuidp->nu_cr.cr_uid = cred->cr_uid;
1200 nuidp->nu_expire = time.tv_sec + NFS_KERBTTL;
1201 nuidp->nu_timestamp = ktvout;
1202 nuidp->nu_nickname = nick;
1203 bcopy(key, nuidp->nu_key, sizeof (NFSKERBKEY_T));
1204 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1205 nu_lru);
1206 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1207 nuidp, nu_hash);
1208 }
1209 } else
1210 nfsm_adv(nfsm_rndup(len));
1211 nfsmout:
1212 *mdp = md;
1213 *dposp = dpos;
1214 return (error);
1215 }
1216 #endif /* NFSCLIENT */
1217