Register keyword removal
[dragonfly.git] / sys / vfs / nfs / nfs_syscalls.c
CommitLineData
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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 $
40393ded 38 * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.7 2003/07/26 21:48:49 rob Exp $
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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
74static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure");
75
76/* Global defs. */
77extern int32_t (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *nd,
78 struct nfssvc_sock *slp,
dadab5e9 79 struct thread *td,
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80 struct mbuf **mreqp));
81extern int nfs_numasync;
82extern time_t nqnfsstarttime;
83extern int nqsrv_writeslack;
84extern int nfsrtton;
85extern struct nfsstats nfsstats;
86extern int nfsrvw_procrastinate;
87extern int nfsrvw_procrastinate_v3;
88static int nuidhash_max = NFS_MAXUIDHASH;
89
90#ifndef NFS_NOSERVER
91static void nfsrv_zapsock __P((struct nfssvc_sock *slp));
92#endif
dadab5e9 93static int nfssvc_iod __P((struct thread *));
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94
95#define TRUE 1
96#define FALSE 0
97
98static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
99
100SYSCTL_DECL(_vfs_nfs);
101
102#ifndef NFS_NOSERVER
103int nfsd_waiting = 0;
104static struct nfsdrt nfsdrt;
105static int nfs_numnfsd = 0;
106static int notstarted = 1;
107static int modify_flag = 0;
108static void nfsd_rt __P((int sotype, struct nfsrv_descript *nd,
109 int cacherep));
110static int nfssvc_addsock __P((struct file *, struct sockaddr *,
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111 struct thread *));
112static int nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t,struct thread *));
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113
114static int nfs_privport = 0;
115SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
116SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
117SYSCTL_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/*
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125 * nfssvc_args(int flag, caddr_t argp)
126 *
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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 */
984263bc 133int
41c20dac 134nfssvc(struct nfssvc_args *uap)
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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;
dadab5e9 149 struct thread *td = curthread;
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150
151 /*
152 * Must be super user
153 */
dadab5e9 154 error = suser(td);
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155 if(error)
156 return (error);
dadab5e9 157 KKASSERT(td->td_proc); /* for ucred and p_fd */
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158 while (nfssvc_sockhead_flag & SLP_INIT) {
159 nfssvc_sockhead_flag |= SLP_WANTINIT;
377d4740 160 (void) tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0);
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161 }
162 if (uap->flag & NFSSVC_BIOD)
dadab5e9 163 error = nfssvc_iod(td);
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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,
dadab5e9 173 ncd.ncd_dirp, td);
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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;
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188 error = nqnfs_clientd(nmp, td->td_proc->p_ucred, &ncd, uap->flag,
189 uap->argp, td);
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190 } else if (uap->flag & NFSSVC_ADDSOCK) {
191 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
192 if (error)
193 return (error);
dadab5e9 194 error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp);
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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) {
dadab5e9 206 fdrop(fp, td);
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207 return (error);
208 }
209 }
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210 error = nfssvc_addsock(fp, nam, td);
211 fdrop(fp, td);
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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;
dadab5e9 303 error = nfssvc_nfsd(nsd, uap->argp, td);
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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 */
315static int
dadab5e9 316nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td)
984263bc 317{
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318 int siz;
319 struct nfssvc_sock *slp;
320 struct socket *so;
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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 */
409static int
dadab5e9 410nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td)
984263bc 411{
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412 int siz;
413 struct nfssvc_sock *slp;
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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();
dadab5e9 430 nfsd->nfsd_td = td;
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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++;
377d4740 445 error = tsleep((caddr_t)nfsd, PCATCH, "nfsd", 0);
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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,
dadab5e9 590 nfsd->nfsd_td, &mreq);
984263bc
MD
591 else
592 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
dadab5e9 593 slp, nfsd->nfsd_td, &mreq);
984263bc
MD
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 }
688done:
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 */
705static void
706nfsrv_zapsock(slp)
40393ded 707 struct nfssvc_sock *slp;
984263bc 708{
40393ded
RG
709 struct nfsuid *nuidp, *nnuidp;
710 struct nfsrv_descript *nwp, *nnwp;
984263bc
MD
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);
dadab5e9 725 closef(fp, NULL);
984263bc
MD
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 */
760void
761nfsrv_slpderef(slp)
40393ded 762 struct nfssvc_sock *slp;
984263bc
MD
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 */
773int
774nfs_slplock(slp, wait)
40393ded 775 struct nfssvc_sock *slp;
984263bc
MD
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;
377d4740 784 (void) tsleep((caddr_t)statep, 0, "nfsslplck", 0);
984263bc
MD
785 }
786 *statep |= NFSSTA_SNDLOCK;
787 return (1);
788}
789
790/*
791 * Unlock the stream socket for others.
792 */
793void
794nfs_slpunlock(slp)
40393ded 795 struct nfssvc_sock *slp;
984263bc
MD
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 */
813void
814nfsrv_init(terminating)
815 int terminating;
816{
40393ded 817 struct nfssvc_sock *slp, *nslp;
984263bc
MD
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 */
864static void
865nfsd_rt(sotype, nd, cacherep)
866 int sotype;
40393ded 867 struct nfsrv_descript *nd;
984263bc
MD
868 int cacherep;
869{
40393ded 870 struct drt *rt;
984263bc
MD
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
896static int nfs_defect = 0;
897SYSCTL_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 */
904static int
dadab5e9 905nfssvc_iod(struct thread *td)
984263bc 906{
40393ded
RG
907 struct buf *bp;
908 int i, myiod;
984263bc
MD
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--;
dadab5e9 934 nfs_iodwant[myiod] = td;
984263bc
MD
935 nfs_iodmount[myiod] = NULL;
936 error = tsleep((caddr_t)&nfs_iodwant[myiod],
377d4740 937 PCATCH, "nfsidl", 0);
984263bc
MD
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 }
3b568787 956 (void) nfs_doio(bp, NULL);
984263bc
MD
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 */
978int
979nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
40393ded 980 struct nfsmount *nmp;
984263bc
MD
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;
377d4740 993 (void) tsleep((caddr_t)&nmp->nm_authtype, 0,
984263bc 994 "nfsauth1", 2 * hz);
dadab5e9 995 error = nfs_sigintr(nmp, rep, rep->r_td);
984263bc
MD
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) {
377d4740 1013 (void) tsleep((caddr_t)&nmp->nm_authlen, 0,
984263bc 1014 "nfsauth2", 2 * hz);
dadab5e9 1015 error = nfs_sigintr(nmp, rep, rep->r_td);
984263bc
MD
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 */
1040int
1041nfs_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{
40393ded
RG
1049 struct nfsuid *nuidp;
1050 u_int32_t *nickp, *verfp;
984263bc
MD
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 */
1108int
1109nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
40393ded 1110 struct nfsmount *nmp;
984263bc
MD
1111 struct ucred *cred;
1112 int len;
1113 NFSKERBKEY_T key;
1114 struct mbuf **mdp;
1115 char **dposp;
1116 struct mbuf *mrep;
1117{
40393ded
RG
1118 struct nfsuid *nuidp;
1119 u_int32_t *tl;
1120 int32_t t1;
984263bc
MD
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));
1172nfsmout:
1173 *mdp = md;
1174 *dposp = dpos;
1175 return (error);
1176}