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1 /*
2 * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
23 /*
24 * Copyright (c) 1989, 1993
25 * The Regents of the University of California. All rights reserved.
26 *
27 * This code is derived from software contributed to Berkeley by
28 * Rick Macklem at The University of Guelph.
29 *
30 * Redistribution and use in source and binary forms, with or without
31 * modification, are permitted provided that the following conditions
32 * are met:
33 * 1. Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * 2. Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in the
37 * documentation and/or other materials provided with the distribution.
38 * 3. All advertising materials mentioning features or use of this software
39 * must display the following acknowledgement:
40 * This product includes software developed by the University of
41 * California, Berkeley and its contributors.
42 * 4. Neither the name of the University nor the names of its contributors
43 * may be used to endorse or promote products derived from this software
44 * without specific prior written permission.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56 * SUCH DAMAGE.
57 *
58 * @(#)nfs_syscalls.c 8.5 (Berkeley) 3/30/95
59 * FreeBSD-Id: nfs_syscalls.c,v 1.32 1997/11/07 08:53:25 phk Exp $
60 */
61
62 #include <sys/param.h>
63 #include <sys/systm.h>
64 /* XXX CSM 11/25/97 FreeBSD's generated syscall prototypes */
65 #ifdef notyet
66 #include <sys/sysproto.h>
67 #endif
68 #include <sys/kernel.h>
69 #include <sys/file.h>
70 #include <sys/filedesc.h>
71 #include <sys/stat.h>
72 #include <sys/vnode.h>
73 #include <sys/mount.h>
74 #include <sys/proc.h>
75 #include <sys/sysctl.h>
76 #include <sys/ubc.h>
77 #include <sys/uio.h>
78 #include <sys/malloc.h>
79 #include <sys/mbuf.h>
80 #include <sys/socket.h>
81 #include <sys/socketvar.h>
82 #include <sys/domain.h>
83 #include <sys/protosw.h>
84 #include <sys/namei.h>
85 #include <sys/fcntl.h>
86 #include <sys/lockf.h>
87 #include <sys/syslog.h>
88 #include <sys/user.h>
89 #include <machine/spl.h>
90
91 #include <bsm/audit_kernel.h>
92
93 #include <netinet/in.h>
94 #include <netinet/tcp.h>
95 #if ISO
96 #include <netiso/iso.h>
97 #endif
98 #include <nfs/xdr_subs.h>
99 #include <nfs/rpcv2.h>
100 #include <nfs/nfsproto.h>
101 #include <nfs/nfs.h>
102 #include <nfs/nfsm_subs.h>
103 #include <nfs/nfsrvcache.h>
104 #include <nfs/nfsmount.h>
105 #include <nfs/nfsnode.h>
106 #include <nfs/nqnfs.h>
107 #include <nfs/nfsrtt.h>
108 #include <nfs/nfs_lock.h>
109
110 /* Global defs. */
111 extern int (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *nd,
112 struct nfssvc_sock *slp,
113 struct proc *procp,
114 struct mbuf **mreqp));
115 extern int nfs_numasync;
116 extern int nfs_ioddelwri;
117 extern time_t nqnfsstarttime;
118 extern int nqsrv_writeslack;
119 extern int nfsrtton;
120 extern struct nfsstats nfsstats;
121 extern int nfsrvw_procrastinate;
122 extern int nfsrvw_procrastinate_v3;
123 struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock;
124 static int nuidhash_max = NFS_MAXUIDHASH;
125
126 static void nfsrv_zapsock __P((struct nfssvc_sock *slp));
127 static int nfssvc_iod __P((struct proc *));
128
129 #define TRUE 1
130 #define FALSE 0
131
132 static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];
133
134 #ifndef NFS_NOSERVER
135 int nfsd_waiting = 0;
136 static struct nfsdrt nfsdrt;
137 static int nfs_numnfsd = 0;
138 static int notstarted = 1;
139 static int modify_flag = 0;
140 static void nfsd_rt __P((int sotype, struct nfsrv_descript *nd,
141 int cacherep));
142 static int nfssvc_addsock __P((struct file *, struct mbuf *,
143 struct proc *));
144 static int nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t,struct proc *));
145
146 static int nfs_privport = 0;
147 /* XXX CSM 11/25/97 Upgrade sysctl.h someday */
148 #ifdef notyet
149 SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
150 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
151 SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
152 #endif
153
154 /*
155 * NFS server system calls
156 * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c
157 */
158
159 /*
160 * Get file handle system call
161 */
162 #ifndef _SYS_SYSPROTO_H_
163 struct getfh_args {
164 char *fname;
165 fhandle_t *fhp;
166 };
167 #endif
168 int
169 getfh(p, uap)
170 struct proc *p;
171 register struct getfh_args *uap;
172 {
173 register struct vnode *vp;
174 fhandle_t fh;
175 int error;
176 struct nameidata nd;
177
178 /*
179 * Must be super user
180 */
181 error = suser(p->p_ucred, &p->p_acflag);
182 if(error)
183 return (error);
184 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1, UIO_USERSPACE, uap->fname, p);
185 error = namei(&nd);
186 if (error)
187 return (error);
188 vp = nd.ni_vp;
189 bzero((caddr_t)&fh, sizeof(fh));
190 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
191 error = VFS_VPTOFH(vp, &fh.fh_fid);
192 vput(vp);
193 if (error)
194 return (error);
195 error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh));
196 return (error);
197 }
198
199 #endif /* NFS_NOSERVER */
200
201 /*
202 * syscall for the rpc.lockd to use to translate a NFS file handle into
203 * an open descriptor.
204 *
205 * warning: do not remove the suser() call or this becomes one giant
206 * security hole.
207 */
208 #ifndef _SYS_SYSPROTO_H_
209 struct fhopen_args {
210 const struct fhandle *u_fhp;
211 int flags;
212 };
213 #endif
214 int
215 fhopen(p, uap, retval)
216 struct proc *p;
217 register struct fhopen_args *uap;
218 register_t *retval;
219 {
220 struct mount *mp;
221 struct vnode *vp;
222 struct fhandle fhp;
223 struct vattr vat;
224 struct vattr *vap = &vat;
225 struct flock lf;
226 struct file *fp;
227 register struct filedesc *fdp = p->p_fd;
228 int fmode, mode, error, type;
229 struct file *nfp;
230 int indx;
231 struct ucred *credanon;
232 int exflags;
233 struct ucred *cred = p->p_ucred;
234 int didhold = 0;
235 extern struct fileops vnops;
236
237 /*
238 * Must be super user
239 */
240 error = suser(cred, &p->p_acflag);
241 if (error)
242 return (error);
243
244 fmode = FFLAGS(uap->flags);
245 /* why not allow a non-read/write open for our lockd? */
246 if (((fmode & (FREAD | FWRITE)) == 0) || (fmode & O_CREAT))
247 return (EINVAL);
248 error = copyin((void*)uap->u_fhp, &fhp, sizeof(fhp));
249 if (error)
250 return (error);
251 /* find the mount point */
252 mp = vfs_getvfs(&fhp.fh_fsid);
253 if (mp == NULL)
254 return (ESTALE);
255 /* now give me my vnode, it gets returned to me locked */
256 /* XXX CSM need to split VFS_CHECKEXP out of VFS_FHTOVP? */
257 error = VFS_FHTOVP(mp, &fhp.fh_fid, NULL, &vp, &exflags, &credanon);
258 if (error)
259 return (error);
260 /*
261 * from now on we have to make sure not
262 * to forget about the vnode
263 * any error that causes an abort must vput(vp)
264 * just set error = err and 'goto bad;'.
265 */
266
267 /*
268 * from vn_open
269 */
270 if (vp->v_type == VSOCK) {
271 error = EOPNOTSUPP;
272 goto bad;
273 }
274
275 if (UBCINFOEXISTS(vp) && ((didhold = ubc_hold(vp)) == 0)) {
276 error = ENOENT;
277 goto bad;
278 }
279
280 if (fmode & FREAD && fmode & (FWRITE | O_TRUNC)) {
281 int err = 0;
282 if (vp->v_type == VDIR)
283 err = EISDIR;
284 else
285 err = vn_writechk(vp);
286 if (err && !(error = VOP_ACCESS(vp, VREAD, cred, p)))
287 error = err;
288 if (error || (error = VOP_ACCESS(vp, VREAD|VWRITE, cred, p)))
289 goto bad;
290 } else if (fmode & FREAD) {
291 if ((error = VOP_ACCESS(vp, VREAD, cred, p)))
292 goto bad;
293 } else if (fmode & (FWRITE | O_TRUNC)) {
294 if (vp->v_type == VDIR) {
295 error = EISDIR;
296 goto bad;
297 }
298 if ((error = vn_writechk(vp)) ||
299 (error = VOP_ACCESS(vp, VWRITE, cred, p)))
300 goto bad;
301 }
302 if (fmode & O_TRUNC) {
303 VOP_UNLOCK(vp, 0, p); /* XXX */
304 VOP_LEASE(vp, p, cred, LEASE_WRITE);
305 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); /* XXX */
306 VATTR_NULL(vap);
307 vap->va_size = 0;
308 error = VOP_SETATTR(vp, vap, cred, p);
309 if (error)
310 goto bad;
311 }
312
313 error = VOP_OPEN(vp, fmode, cred, p);
314 if (error)
315 goto bad;
316
317 if (fmode & FWRITE)
318 if (++vp->v_writecount <= 0)
319 panic("fhopen: v_writecount");
320 /*
321 * end of vn_open code
322 */
323
324 if ((error = falloc(p, &nfp, &indx)) != 0) {
325 if (fmode & FWRITE)
326 vp->v_writecount--;
327 goto bad;
328 }
329 fp = nfp;
330
331 /*
332 * Hold an extra reference to avoid having fp ripped out
333 * from under us while we block in the lock op
334 */
335 fref(fp);
336 nfp->f_data = (caddr_t)vp;
337 nfp->f_flag = fmode & FMASK;
338 nfp->f_ops = &vnops;
339 nfp->f_type = DTYPE_VNODE;
340 if (fmode & (O_EXLOCK | O_SHLOCK)) {
341 lf.l_whence = SEEK_SET;
342 lf.l_start = 0;
343 lf.l_len = 0;
344 if (fmode & O_EXLOCK)
345 lf.l_type = F_WRLCK;
346 else
347 lf.l_type = F_RDLCK;
348 type = F_FLOCK;
349 if ((fmode & FNONBLOCK) == 0)
350 type |= F_WAIT;
351 VOP_UNLOCK(vp, 0, p);
352 if ((error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf,
353 type)) != 0) {
354 (void) vn_close(vp, fp->f_flag, fp->f_cred, p);
355 ffree(fp);
356 fdrelse(p, indx);
357 /*
358 * release our private reference
359 */
360 frele(fp);
361
362 return (error);
363 }
364 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
365 fp->f_flag |= FHASLOCK;
366 }
367
368 VOP_UNLOCK(vp, 0, p);
369 *fdflags(p, indx) &= ~UF_RESERVED;
370 frele(fp);
371 *retval = indx;
372 return (0);
373
374 bad:
375 VOP_UNLOCK(vp, 0, p);
376 if (didhold)
377 ubc_rele(vp);
378 vrele(vp);
379 return (error);
380 }
381
382 /*
383 * Nfs server psuedo system call for the nfsd's
384 * Based on the flag value it either:
385 * - adds a socket to the selection list
386 * - remains in the kernel as an nfsd
387 * - remains in the kernel as an nfsiod
388 */
389 #ifndef _SYS_SYSPROTO_H_
390 struct nfssvc_args {
391 int flag;
392 caddr_t argp;
393 };
394 #endif
395 int
396 nfssvc(p, uap)
397 struct proc *p;
398 register struct nfssvc_args *uap;
399 {
400 #ifndef NFS_NOSERVER
401 struct nameidata nd;
402 struct file *fp;
403 struct mbuf *nam;
404 struct nfsd_args nfsdarg;
405 struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
406 struct nfsd_cargs ncd;
407 struct nfsd *nfsd;
408 struct nfssvc_sock *slp;
409 struct nfsuid *nuidp;
410 struct nfsmount *nmp;
411 struct timeval now;
412 #endif /* NFS_NOSERVER */
413 int error;
414
415 AUDIT_ARG(cmd, uap->flag);
416
417 /*
418 * Must be super user
419 */
420 error = suser(p->p_ucred, &p->p_acflag);
421 if(error)
422 return (error);
423 while (nfssvc_sockhead_flag & SLP_INIT) {
424 nfssvc_sockhead_flag |= SLP_WANTINIT;
425 (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
426 }
427 if (uap->flag & NFSSVC_BIOD)
428 error = nfssvc_iod(p);
429 #ifdef NFS_NOSERVER
430 else
431 error = ENXIO;
432 #else /* !NFS_NOSERVER */
433 else if (uap->flag & NFSSVC_MNTD) {
434 error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
435 if (error)
436 return (error);
437 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNPATH1,
438 UIO_USERSPACE, ncd.ncd_dirp, p);
439 error = namei(&nd);
440 if (error)
441 return (error);
442 if ((nd.ni_vp->v_flag & VROOT) == 0)
443 error = EINVAL;
444 nmp = VFSTONFS(nd.ni_vp->v_mount);
445 vput(nd.ni_vp);
446 if (error)
447 return (error);
448
449 if ((nmp->nm_state & NFSSTA_MNTD) &&
450 (uap->flag & NFSSVC_GOTAUTH) == 0)
451 return (0);
452 nmp->nm_state |= NFSSTA_MNTD;
453 error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
454 uap->argp, p);
455 } else if (uap->flag & NFSSVC_ADDSOCK) {
456 error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
457 if (error)
458 return (error);
459 error = getsock(p->p_fd, nfsdarg.sock, &fp);
460 if (error)
461 return (error);
462 /*
463 * Get the client address for connected sockets.
464 */
465 if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
466 nam = (struct mbuf *)0;
467 else {
468 error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen,
469 MT_SONAME);
470 if (error)
471 return (error);
472 }
473 error = nfssvc_addsock(fp, nam, p);
474 } else {
475 error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
476 if (error)
477 return (error);
478
479 if ((uap->flag & NFSSVC_AUTHIN) && ((nfsd = nsd->nsd_nfsd)) &&
480 (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
481 slp = nfsd->nfsd_slp;
482
483 /*
484 * First check to see if another nfsd has already
485 * added this credential.
486 */
487 for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
488 nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
489 if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
490 (!nfsd->nfsd_nd->nd_nam2 ||
491 netaddr_match(NU_NETFAM(nuidp),
492 &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
493 break;
494 }
495 if (nuidp) {
496 nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
497 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
498 } else {
499 /*
500 * Nope, so we will.
501 */
502 if (slp->ns_numuids < nuidhash_max) {
503 slp->ns_numuids++;
504 nuidp = (struct nfsuid *)
505 _MALLOC_ZONE(sizeof (struct nfsuid),
506 M_NFSUID, M_WAITOK);
507 } else
508 nuidp = (struct nfsuid *)0;
509 if ((slp->ns_flag & SLP_VALID) == 0) {
510 if (nuidp)
511 FREE_ZONE((caddr_t)nuidp,
512 sizeof (struct nfsuid), M_NFSUID);
513 } else {
514 if (nuidp == (struct nfsuid *)0) {
515 nuidp = slp->ns_uidlruhead.tqh_first;
516 LIST_REMOVE(nuidp, nu_hash);
517 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
518 nu_lru);
519 if (nuidp->nu_flag & NU_NAM)
520 m_freem(nuidp->nu_nam);
521 }
522 nuidp->nu_flag = 0;
523 nuidp->nu_cr = nsd->nsd_cr;
524 if (nuidp->nu_cr.cr_ngroups > NGROUPS)
525 nuidp->nu_cr.cr_ngroups = NGROUPS;
526 nuidp->nu_cr.cr_ref = 1;
527 nuidp->nu_timestamp = nsd->nsd_timestamp;
528 microtime(&now);
529 nuidp->nu_expire = now.tv_sec + nsd->nsd_ttl;
530 /*
531 * and save the session key in nu_key.
532 */
533 bcopy(nsd->nsd_key, nuidp->nu_key,
534 sizeof (nsd->nsd_key));
535 if (nfsd->nfsd_nd->nd_nam2) {
536 struct sockaddr_in *saddr;
537
538 saddr = mtod(nfsd->nfsd_nd->nd_nam2,
539 struct sockaddr_in *);
540 switch (saddr->sin_family) {
541 case AF_INET:
542 nuidp->nu_flag |= NU_INETADDR;
543 nuidp->nu_inetaddr =
544 saddr->sin_addr.s_addr;
545 break;
546 case AF_ISO:
547 default:
548 nuidp->nu_flag |= NU_NAM;
549 nuidp->nu_nam = m_copym(
550 nfsd->nfsd_nd->nd_nam2, 0,
551 M_COPYALL, M_WAIT);
552 break;
553 };
554 }
555 TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
556 nu_lru);
557 LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
558 nuidp, nu_hash);
559 nfsrv_setcred(&nuidp->nu_cr,
560 &nfsd->nfsd_nd->nd_cr);
561 nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
562 }
563 }
564 }
565 if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
566 nfsd->nfsd_flag |= NFSD_AUTHFAIL;
567 error = nfssvc_nfsd(nsd, uap->argp, p);
568 }
569 #endif /* NFS_NOSERVER */
570 if (error == EINTR || error == ERESTART)
571 error = 0;
572 return (error);
573 }
574
575 #ifndef NFS_NOSERVER
576 /*
577 * Adds a socket to the list for servicing by nfsds.
578 */
579 static int
580 nfssvc_addsock(fp, mynam, p)
581 struct file *fp;
582 struct mbuf *mynam;
583 struct proc *p;
584 {
585 register struct mbuf *m;
586 register int siz;
587 register struct nfssvc_sock *slp;
588 register struct socket *so;
589 struct nfssvc_sock *tslp;
590 int error, s;
591
592 so = (struct socket *)fp->f_data;
593 tslp = (struct nfssvc_sock *)0;
594 /*
595 * Add it to the list, as required.
596 */
597 thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
598 if (so->so_proto->pr_protocol == IPPROTO_UDP) {
599 tslp = nfs_udpsock;
600 if (tslp->ns_flag & SLP_VALID) {
601 m_freem(mynam);
602 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
603 return (EPERM);
604 }
605 #if ISO
606 } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) {
607 tslp = nfs_cltpsock;
608 if (tslp->ns_flag & SLP_VALID) {
609 m_freem(mynam);
610 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
611 return (EPERM);
612 }
613 #endif /* ISO */
614 }
615 /* reserve buffer space for 2 maximally-sized packets */
616 siz = NFS_MAXPACKET;
617 if (so->so_type == SOCK_STREAM)
618 siz += sizeof (u_long);
619 siz *= 2;
620 if (siz > NFS_MAXSOCKBUF)
621 siz = NFS_MAXSOCKBUF;
622 error = soreserve(so, siz, siz);
623 if (error) {
624 m_freem(mynam);
625 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
626 return (error);
627 }
628
629 /*
630 * Set protocol specific options { for now TCP only } and
631 * reserve some space. For datagram sockets, this can get called
632 * repeatedly for the same socket, but that isn't harmful.
633 */
634 if (so->so_type == SOCK_STREAM) {
635 struct sockopt sopt;
636 int val;
637
638 bzero(&sopt, sizeof sopt);
639 sopt.sopt_dir = SOPT_SET;
640 sopt.sopt_level = SOL_SOCKET;
641 sopt.sopt_name = SO_KEEPALIVE;
642 sopt.sopt_val = &val;
643 sopt.sopt_valsize = sizeof val;
644 val = 1;
645 sosetopt(so, &sopt);
646 }
647 if (so->so_proto->pr_domain->dom_family == AF_INET &&
648 so->so_proto->pr_protocol == IPPROTO_TCP) {
649 struct sockopt sopt;
650 int val;
651
652 bzero(&sopt, sizeof sopt);
653 sopt.sopt_dir = SOPT_SET;
654 sopt.sopt_level = IPPROTO_TCP;
655 sopt.sopt_name = TCP_NODELAY;
656 sopt.sopt_val = &val;
657 sopt.sopt_valsize = sizeof val;
658 val = 1;
659 sosetopt(so, &sopt);
660 }
661
662 so->so_rcv.sb_flags &= ~SB_NOINTR;
663 so->so_rcv.sb_timeo = 0;
664 so->so_snd.sb_flags &= ~SB_NOINTR;
665 so->so_snd.sb_timeo = 0;
666 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
667 if (tslp)
668 slp = tslp;
669 else {
670 MALLOC(slp, struct nfssvc_sock *, sizeof(struct nfssvc_sock),
671 M_NFSSVC, M_WAITOK);
672 bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
673 TAILQ_INIT(&slp->ns_uidlruhead);
674 TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
675 }
676 slp->ns_so = so;
677 slp->ns_nam = mynam;
678 slp->ns_fp = fp;
679 (void)fref(fp);
680 thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
681 s = splnet();
682 so->so_upcallarg = (caddr_t)slp;
683 so->so_upcall = nfsrv_rcv;
684 so->so_rcv.sb_flags |= SB_UPCALL; /* required for freebsd merge */
685 slp->ns_nflag = SLPN_NEEDQ;
686 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
687 slp->ns_flag = SLP_VALID;
688 nfsrv_wakenfsd(slp);
689 splx(s);
690 return (0);
691 }
692
693 /*
694 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
695 * until it is killed by a signal.
696 */
697 static int
698 nfssvc_nfsd(nsd, argp, p)
699 struct nfsd_srvargs *nsd;
700 caddr_t argp;
701 struct proc *p;
702 {
703 register struct mbuf *m;
704 register int siz;
705 register struct nfssvc_sock *slp;
706 register struct socket *so;
707 struct nfsd *nfsd = nsd->nsd_nfsd;
708 struct nfsrv_descript *nd = NULL;
709 struct mbuf *mreq;
710 int error = 0, cacherep, s, sotype, writes_todo;
711 int procrastinate;
712 u_quad_t cur_usec;
713 struct timeval now;
714
715 #ifndef nolint
716 cacherep = RC_DOIT;
717 writes_todo = 0;
718 #endif
719 s = splnet();
720 if (nfsd == (struct nfsd *)0) {
721 MALLOC(nfsd, struct nfsd *, sizeof(struct nfsd), M_NFSD, M_WAITOK);
722 nsd->nsd_nfsd = nfsd;
723 bzero((caddr_t)nfsd, sizeof (struct nfsd));
724 nfsd->nfsd_procp = p;
725 TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
726 nfs_numnfsd++;
727 }
728 /*
729 * Loop getting rpc requests until SIGKILL.
730 */
731 for (;;) {
732 if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
733 while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
734 (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
735 nfsd->nfsd_flag |= NFSD_WAITING;
736 nfsd_waiting++;
737 error = tsleep((caddr_t)nfsd, PSOCK | PCATCH,
738 "nfsd", 0);
739 nfsd_waiting--;
740 if (error)
741 goto done;
742 }
743 if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
744 (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
745 for (slp = nfssvc_sockhead.tqh_first; slp != 0;
746 slp = slp->ns_chain.tqe_next) {
747 if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
748 == (SLP_VALID | SLP_DOREC)) {
749 slp->ns_flag &= ~SLP_DOREC;
750 slp->ns_sref++;
751 nfsd->nfsd_slp = slp;
752 break;
753 }
754 }
755 if (slp == 0)
756 nfsd_head_flag &= ~NFSD_CHECKSLP;
757 }
758 if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
759 continue;
760 if (slp->ns_flag & SLP_VALID) {
761 nfs_slplock(slp, 1);
762 if (slp->ns_nflag & SLPN_DISCONN) {
763 nfsrv_zapsock(slp);
764 thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
765 } else if (slp->ns_nflag & SLPN_NEEDQ) {
766 thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
767 slp->ns_nflag &= ~SLPN_NEEDQ;
768 nfsrv_rcv(slp->ns_so, (caddr_t)slp,
769 M_WAIT);
770 } else
771 thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
772 error = nfsrv_dorec(slp, nfsd, &nd);
773 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
774 nfs_slpunlock(slp);
775 microuptime(&now);
776 cur_usec = (u_quad_t)now.tv_sec * 1000000 +
777 (u_quad_t)now.tv_usec;
778 if (error && slp->ns_tq.lh_first &&
779 slp->ns_tq.lh_first->nd_time <= cur_usec) {
780 error = 0;
781 cacherep = RC_DOIT;
782 writes_todo = 1;
783 } else
784 writes_todo = 0;
785 nfsd->nfsd_flag |= NFSD_REQINPROG;
786 }
787 } else {
788 error = 0;
789 slp = nfsd->nfsd_slp;
790 }
791 if (error || (slp->ns_flag & SLP_VALID) == 0) {
792 if (nd) {
793 if (nd->nd_nam2)
794 m_freem(nd->nd_nam2);
795 FREE_ZONE((caddr_t)nd,
796 sizeof *nd, M_NFSRVDESC);
797 nd = NULL;
798 }
799 nfsd->nfsd_slp = (struct nfssvc_sock *)0;
800 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
801 nfsrv_slpderef(slp);
802 continue;
803 }
804 splx(s);
805 so = slp->ns_so;
806 sotype = so->so_type;
807 if (nd) {
808 microuptime(&nd->nd_starttime);
809 if (nd->nd_nam2)
810 nd->nd_nam = nd->nd_nam2;
811 else
812 nd->nd_nam = slp->ns_nam;
813
814 /*
815 * Check to see if authorization is needed.
816 */
817 if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
818 nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
819 nsd->nsd_haddr = mtod(nd->nd_nam,
820 struct sockaddr_in *)->sin_addr.s_addr;
821 nsd->nsd_authlen = nfsd->nfsd_authlen;
822 nsd->nsd_verflen = nfsd->nfsd_verflen;
823 if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
824 nfsd->nfsd_authlen) &&
825 !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
826 nfsd->nfsd_verflen) &&
827 !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
828 return (ENEEDAUTH);
829 cacherep = RC_DROPIT;
830 } else
831 cacherep = nfsrv_getcache(nd, slp, &mreq);
832
833 /*
834 * Check for just starting up for NQNFS and send
835 * fake "try again later" replies to the NQNFS clients.
836 */
837 microtime(&now);
838 if (notstarted && nqnfsstarttime <= now.tv_sec) {
839 if (modify_flag) {
840 nqnfsstarttime = now.tv_sec + nqsrv_writeslack;
841 modify_flag = 0;
842 } else
843 notstarted = 0;
844 }
845 if (notstarted) {
846 if ((nd->nd_flag & ND_NQNFS) == 0)
847 cacherep = RC_DROPIT;
848 else if (nd->nd_procnum != NFSPROC_WRITE) {
849 nd->nd_procnum = NFSPROC_NOOP;
850 nd->nd_repstat = NQNFS_TRYLATER;
851 cacherep = RC_DOIT;
852 } else
853 modify_flag = 1;
854 } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
855 nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
856 nd->nd_procnum = NFSPROC_NOOP;
857 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
858 cacherep = RC_DOIT;
859 } else if (nfs_privport) {
860 /* Check if source port is privileged */
861 u_short port;
862 struct sockaddr *nam = mtod(nd->nd_nam, struct sockaddr*);
863 struct sockaddr_in *sin;
864
865 sin = (struct sockaddr_in *)nam;
866 port = ntohs(sin->sin_port);
867 if (port >= IPPORT_RESERVED &&
868 nd->nd_procnum != NFSPROC_NULL) {
869 nd->nd_procnum = NFSPROC_NOOP;
870 nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
871 cacherep = RC_DOIT;
872 printf("NFS request from unprivileged port (%s:%d)\n",
873 (char *)(inet_ntoa(sin->sin_addr)), port);
874 }
875 }
876
877 }
878
879 /*
880 * Loop to get all the write rpc relies that have been
881 * gathered together.
882 */
883 do {
884 switch (cacherep) {
885 case RC_DOIT:
886 if (nd && (nd->nd_flag & ND_NFSV3))
887 procrastinate = nfsrvw_procrastinate_v3;
888 else
889 procrastinate = nfsrvw_procrastinate;
890 if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
891 procrastinate > 0 && !notstarted))
892 error = nfsrv_writegather(&nd, slp,
893 nfsd->nfsd_procp, &mreq);
894 else
895 error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
896 slp, nfsd->nfsd_procp, &mreq);
897 if (mreq == NULL)
898 break;
899 if (error) {
900 if (nd->nd_procnum != NQNFSPROC_VACATED)
901 nfsstats.srv_errs++;
902 nfsrv_updatecache(nd, FALSE, mreq);
903 if (nd->nd_nam2) {
904 m_freem(nd->nd_nam2);
905 nd->nd_nam2 = NULL;
906 }
907 break;
908 }
909 nfsstats.srvrpccnt[nd->nd_procnum]++;
910 nfsrv_updatecache(nd, TRUE, mreq);
911 nd->nd_mrep = (struct mbuf *)0;
912 case RC_REPLY:
913 m = mreq;
914 siz = 0;
915 while (m) {
916 siz += m->m_len;
917 m = m->m_next;
918 }
919 if (siz <= 0 || siz > NFS_MAXPACKET) {
920 printf("mbuf siz=%d\n",siz);
921 panic("Bad nfs svc reply");
922 }
923 m = mreq;
924 m->m_pkthdr.len = siz;
925 m->m_pkthdr.rcvif = (struct ifnet *)0;
926 /*
927 * For stream protocols, prepend a Sun RPC
928 * Record Mark.
929 */
930 if (sotype == SOCK_STREAM) {
931 M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
932 *mtod(m, u_long *) = htonl(0x80000000 | siz);
933 }
934 if (so->so_proto->pr_flags & PR_CONNREQUIRED)
935 (void) nfs_slplock(slp, 1);
936 if (slp->ns_flag & SLP_VALID)
937 error = nfs_send(so, nd->nd_nam2, m, NULL);
938 else {
939 error = EPIPE;
940 m_freem(m);
941 }
942 mreq = NULL;
943 if (nfsrtton)
944 nfsd_rt(sotype, nd, cacherep);
945 if (nd->nd_nam2) {
946 MFREE(nd->nd_nam2, m);
947 nd->nd_nam2 = NULL;
948 }
949 if (nd->nd_mrep) {
950 m_freem(nd->nd_mrep);
951 nd->nd_mrep = NULL;
952 }
953 if (error == EPIPE)
954 nfsrv_zapsock(slp);
955 if (so->so_proto->pr_flags & PR_CONNREQUIRED)
956 nfs_slpunlock(slp);
957 if (error == EINTR || error == ERESTART) {
958 FREE_ZONE((caddr_t)nd,
959 sizeof *nd, M_NFSRVDESC);
960 nfsrv_slpderef(slp);
961 s = splnet();
962 goto done;
963 }
964 break;
965 case RC_DROPIT:
966 if (nfsrtton)
967 nfsd_rt(sotype, nd, cacherep);
968 m_freem(nd->nd_mrep);
969 m_freem(nd->nd_nam2);
970 nd->nd_mrep = nd->nd_nam2 = NULL;
971 break;
972 };
973 if (nd) {
974 if (nd->nd_mrep)
975 m_freem(nd->nd_mrep);
976 if (nd->nd_nam2)
977 m_freem(nd->nd_nam2);
978 FREE_ZONE((caddr_t)nd, sizeof *nd, M_NFSRVDESC);
979 nd = NULL;
980 }
981
982 /*
983 * Check to see if there are outstanding writes that
984 * need to be serviced.
985 */
986 microuptime(&now);
987 cur_usec = (u_quad_t)now.tv_sec * 1000000 +
988 (u_quad_t)now.tv_usec;
989 s = splsoftclock();
990 if (slp->ns_tq.lh_first &&
991 slp->ns_tq.lh_first->nd_time <= cur_usec) {
992 cacherep = RC_DOIT;
993 writes_todo = 1;
994 } else
995 writes_todo = 0;
996 splx(s);
997 } while (writes_todo);
998 s = splnet();
999 thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
1000 if (nfsrv_dorec(slp, nfsd, &nd)) {
1001 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
1002 nfsd->nfsd_flag &= ~NFSD_REQINPROG;
1003 nfsd->nfsd_slp = NULL;
1004 nfsrv_slpderef(slp);
1005 } else
1006 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
1007 }
1008 done:
1009 TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
1010 splx(s);
1011 _FREE((caddr_t)nfsd, M_NFSD);
1012 nsd->nsd_nfsd = (struct nfsd *)0;
1013 if (--nfs_numnfsd == 0)
1014 nfsrv_init(TRUE); /* Reinitialize everything */
1015 return (error);
1016 }
1017 #endif /* NFS_NOSERVER */
1018
1019 int nfs_defect = 0;
1020 /* XXX CSM 11/25/97 Upgrade sysctl.h someday */
1021 #ifdef notyet
1022 SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
1023 #endif
1024
1025 #ifndef _SYS_SYSPROTO_H_
1026 struct nfsclnt_args {
1027 int flag;
1028 caddr_t argp;
1029 };
1030 #endif
1031 int
1032 nfsclnt(struct proc *p, struct nfsclnt_args *uap)
1033 {
1034 struct lockd_ans la;
1035 int error;
1036
1037 if (uap->flag == NFSCLNT_LOCKDWAIT) {
1038 return (nfslockdwait(p));
1039 }
1040 if (uap->flag == NFSCLNT_LOCKDANS) {
1041 error = copyin(uap->argp, &la, sizeof(la));
1042 return (error != 0 ? error : nfslockdans(p, &la));
1043 }
1044 if (uap->flag == NFSCLNT_LOCKDFD)
1045 return (nfslockdfd(p, (int)uap->argp));
1046 return EINVAL;
1047 }
1048
1049
1050 static int nfssvc_iod_continue(int);
1051
1052 /*
1053 * Asynchronous I/O daemons for client nfs.
1054 * They do read-ahead and write-behind operations on the block I/O cache.
1055 * Never returns unless it fails or gets killed.
1056 */
1057 static int
1058 nfssvc_iod(p)
1059 struct proc *p;
1060 {
1061 register int i, myiod;
1062 struct nfsmount *nmp;
1063 int error = 0;
1064 struct uthread *ut;
1065
1066 /*
1067 * Assign my position or return error if too many already running
1068 */
1069 myiod = -1;
1070 for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
1071 if (nfs_asyncdaemon[i] == 0) {
1072 nfs_asyncdaemon[i]++;
1073 myiod = i;
1074 break;
1075 }
1076 if (myiod == -1)
1077 return (EBUSY);
1078 nfs_numasync++;
1079
1080 /* stuff myiod into uthread to get off local stack for continuation */
1081
1082 ut = (struct uthread *)get_bsdthread_info(current_act());
1083 ut->uu_state.uu_nfs_myiod = myiod; /* squirrel away for continuation */
1084
1085 nfssvc_iod_continue(0);
1086 /* NOTREACHED */
1087
1088 }
1089
1090 /*
1091 * Continuation for Asynchronous I/O daemons for client nfs.
1092 */
1093 static int
1094 nfssvc_iod_continue(error)
1095 {
1096 register struct nfsbuf *bp;
1097 register int i, myiod;
1098 struct nfsmount *nmp;
1099 struct uthread *ut;
1100 struct proc *p;
1101
1102 /*
1103 * real myiod is stored in uthread, recover it
1104 */
1105 ut = (struct uthread *)get_bsdthread_info(current_act());
1106 myiod = ut->uu_state.uu_nfs_myiod;
1107 p = current_proc();
1108
1109 /*
1110 * Just loop around doin our stuff until SIGKILL
1111 * - actually we don't loop with continuations...
1112 */
1113 for (;;) {
1114 while (((nmp = nfs_iodmount[myiod]) == NULL
1115 || nmp->nm_bufq.tqh_first == NULL)
1116 && error == 0 && nfs_ioddelwri == 0) {
1117 if (nmp)
1118 nmp->nm_bufqiods--;
1119 nfs_iodwant[myiod] = p;
1120 nfs_iodmount[myiod] = NULL;
1121 error = tsleep0((caddr_t)&nfs_iodwant[myiod],
1122 PWAIT | PCATCH, "nfsidl", 0, nfssvc_iod_continue);
1123 /* NOTREACHED */
1124 }
1125 if (error) {
1126 nfs_asyncdaemon[myiod] = 0;
1127 if (nmp) nmp->nm_bufqiods--;
1128 nfs_iodwant[myiod] = NULL;
1129 nfs_iodmount[myiod] = NULL;
1130 nfs_numasync--;
1131 if (error == EINTR || error == ERESTART)
1132 error = 0;
1133 unix_syscall_return(error);
1134 }
1135 if (nmp != NULL) {
1136 while ((bp = nmp->nm_bufq.tqh_first) != NULL) {
1137 /* Take one off the front of the list */
1138 TAILQ_REMOVE(&nmp->nm_bufq, bp, nb_free);
1139 bp->nb_free.tqe_next = NFSNOLIST;
1140 nmp->nm_bufqlen--;
1141 if (nmp->nm_bufqwant && nmp->nm_bufqlen < 2 * nfs_numasync) {
1142 nmp->nm_bufqwant = FALSE;
1143 wakeup(&nmp->nm_bufq);
1144 }
1145 if (ISSET(bp->nb_flags, NB_READ))
1146 (void) nfs_doio(bp, bp->nb_rcred, (struct proc *)0);
1147 else
1148 (void) nfs_doio(bp, bp->nb_wcred, (struct proc *)0);
1149
1150 /*
1151 * If there are more than one iod on this mount, then defect
1152 * so that the iods can be shared out fairly between the mounts
1153 */
1154 if (nfs_defect && nmp->nm_bufqiods > 1) {
1155 NFS_DPF(ASYNCIO,
1156 ("nfssvc_iod: iod %d defecting from mount %p\n",
1157 myiod, nmp));
1158 nfs_iodmount[myiod] = NULL;
1159 nmp->nm_bufqiods--;
1160 break;
1161 }
1162 }
1163 }
1164 if (nfs_ioddelwri) {
1165 i = 0;
1166 nfs_ioddelwri = 0;
1167 while (i < 8 && (bp = TAILQ_FIRST(&nfsbufdelwri)) != NULL) {
1168 struct nfsnode *np = VTONFS(bp->nb_vp);
1169 nfs_buf_remfree(bp);
1170 if (ISSET(bp->nb_flags, NB_NEEDCOMMIT)) {
1171 /* put buffer at end of delwri list */
1172 TAILQ_INSERT_TAIL(&nfsbufdelwri, bp, nb_free);
1173 nfsbufdelwricnt++;
1174 nfs_flushcommits(np->n_vnode, (struct proc *)0);
1175 } else {
1176 SET(bp->nb_flags, (NB_BUSY | NB_ASYNC | NB_IOD));
1177 nfs_buf_write(bp);
1178 }
1179 i++;
1180 }
1181 }
1182 }
1183 }
1184
1185 /*
1186 * Shut down a socket associated with an nfssvc_sock structure.
1187 * Should be called with the send lock set, if required.
1188 * The trick here is to increment the sref at the start, so that the nfsds
1189 * will stop using it and clear ns_flag at the end so that it will not be
1190 * reassigned during cleanup.
1191 */
1192 static void
1193 nfsrv_zapsock(slp)
1194 register struct nfssvc_sock *slp;
1195 {
1196 register struct nfsuid *nuidp, *nnuidp;
1197 register struct nfsrv_descript *nwp, *nnwp;
1198 struct socket *so;
1199 struct file *fp;
1200 struct mbuf *m;
1201 int s;
1202
1203 slp->ns_flag &= ~SLP_ALLFLAGS;
1204 slp->ns_nflag &= ~SLP_ALLFLAGS;
1205 fp = slp->ns_fp;
1206 if (fp) {
1207 slp->ns_fp = (struct file *)0;
1208 so = slp->ns_so;
1209 thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
1210 so->so_upcall = NULL;
1211 so->so_rcv.sb_flags &= ~SB_UPCALL;
1212 soshutdown(so, 2);
1213 if (slp->ns_nam)
1214 MFREE(slp->ns_nam, m);
1215 m_freem(slp->ns_raw);
1216 m_freem(slp->ns_rec);
1217 slp->ns_nam = slp->ns_raw = slp->ns_rec = NULL;
1218 thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
1219 closef(fp, (struct proc *)0);
1220 for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0;
1221 nuidp = nnuidp) {
1222 nnuidp = nuidp->nu_lru.tqe_next;
1223 LIST_REMOVE(nuidp, nu_hash);
1224 TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
1225 if (nuidp->nu_flag & NU_NAM)
1226 m_freem(nuidp->nu_nam);
1227 FREE_ZONE((caddr_t)nuidp,
1228 sizeof (struct nfsuid), M_NFSUID);
1229 }
1230 s = splsoftclock();
1231 for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
1232 nnwp = nwp->nd_tq.le_next;
1233 LIST_REMOVE(nwp, nd_tq);
1234 FREE_ZONE((caddr_t)nwp, sizeof *nwp, M_NFSRVDESC);
1235 }
1236 LIST_INIT(&slp->ns_tq);
1237 splx(s);
1238 }
1239 }
1240
1241 /*
1242 * Get an authorization string for the uid by having the mount_nfs sitting
1243 * on this mount point porpous out of the kernel and do it.
1244 */
1245 int
1246 nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
1247 register struct nfsmount *nmp;
1248 struct nfsreq *rep;
1249 struct ucred *cred;
1250 char **auth_str;
1251 int *auth_len;
1252 char *verf_str;
1253 int *verf_len;
1254 NFSKERBKEY_T key; /* return session key */
1255 {
1256 int error = 0;
1257
1258 while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) {
1259 nmp->nm_state |= NFSSTA_WANTAUTH;
1260 (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK,
1261 "nfsauth1", 2 * hz);
1262 error = nfs_sigintr(nmp, rep, rep->r_procp);
1263 if (error) {
1264 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1265 return (error);
1266 }
1267 }
1268 nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH);
1269 MALLOC(*auth_str, char *, RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
1270 nmp->nm_authstr = *auth_str;
1271 nmp->nm_authlen = RPCAUTH_MAXSIZ;
1272 nmp->nm_verfstr = verf_str;
1273 nmp->nm_verflen = *verf_len;
1274 nmp->nm_authuid = cred->cr_uid;
1275 wakeup((caddr_t)&nmp->nm_authstr);
1276
1277 /*
1278 * And wait for mount_nfs to do its stuff.
1279 */
1280 while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) {
1281 (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK,
1282 "nfsauth2", 2 * hz);
1283 error = nfs_sigintr(nmp, rep, rep->r_procp);
1284 }
1285 if (nmp->nm_state & NFSSTA_AUTHERR) {
1286 nmp->nm_state &= ~NFSSTA_AUTHERR;
1287 error = EAUTH;
1288 }
1289 if (error)
1290 _FREE((caddr_t)*auth_str, M_TEMP);
1291 else {
1292 *auth_len = nmp->nm_authlen;
1293 *verf_len = nmp->nm_verflen;
1294 bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
1295 }
1296 nmp->nm_state &= ~NFSSTA_HASAUTH;
1297 nmp->nm_state |= NFSSTA_WAITAUTH;
1298 if (nmp->nm_state & NFSSTA_WANTAUTH) {
1299 nmp->nm_state &= ~NFSSTA_WANTAUTH;
1300 wakeup((caddr_t)&nmp->nm_authtype);
1301 }
1302 return (error);
1303 }
1304
1305 /*
1306 * Get a nickname authenticator and verifier.
1307 */
1308 int
1309 nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
1310 struct nfsmount *nmp;
1311 struct ucred *cred;
1312 char **auth_str;
1313 int *auth_len;
1314 char *verf_str;
1315 int verf_len;
1316 {
1317 register struct nfsuid *nuidp;
1318 register u_long *nickp, *verfp;
1319 struct timeval ktvin, ktvout, now;
1320
1321 #if DIAGNOSTIC
1322 if (verf_len < (4 * NFSX_UNSIGNED))
1323 panic("nfs_getnickauth verf too small");
1324 #endif
1325 for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
1326 nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
1327 if (nuidp->nu_cr.cr_uid == cred->cr_uid)
1328 break;
1329 }
1330 microtime(&now);
1331 if (!nuidp || nuidp->nu_expire < now.tv_sec)
1332 return (EACCES);
1333
1334 /*
1335 * Move to the end of the lru list (end of lru == most recently used).
1336 */
1337 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1338 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);
1339
1340 MALLOC(nickp, u_long *, 2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
1341 *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
1342 *nickp = txdr_unsigned(nuidp->nu_nickname);
1343 *auth_str = (char *)nickp;
1344 *auth_len = 2 * NFSX_UNSIGNED;
1345
1346 /*
1347 * Now we must encrypt the verifier and package it up.
1348 */
1349 verfp = (u_long *)verf_str;
1350 *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
1351 microtime(&now);
1352 if (now.tv_sec > nuidp->nu_timestamp.tv_sec ||
1353 (now.tv_sec == nuidp->nu_timestamp.tv_sec &&
1354 now.tv_usec > nuidp->nu_timestamp.tv_usec))
1355 nuidp->nu_timestamp = now;
1356 else
1357 nuidp->nu_timestamp.tv_usec++;
1358 ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
1359 ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);
1360
1361 /*
1362 * Now encrypt the timestamp verifier in ecb mode using the session
1363 * key.
1364 */
1365 #if NFSKERB
1366 XXX
1367 #endif
1368
1369 *verfp++ = ktvout.tv_sec;
1370 *verfp++ = ktvout.tv_usec;
1371 *verfp = 0;
1372 return (0);
1373 }
1374
1375 /*
1376 * Save the current nickname in a hash list entry on the mount point.
1377 */
1378 int
1379 nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
1380 register struct nfsmount *nmp;
1381 struct ucred *cred;
1382 int len;
1383 NFSKERBKEY_T key;
1384 struct mbuf **mdp;
1385 char **dposp;
1386 struct mbuf *mrep;
1387 {
1388 register struct nfsuid *nuidp;
1389 register u_long *tl;
1390 register long t1;
1391 struct mbuf *md = *mdp;
1392 struct timeval ktvin, ktvout, now;
1393 u_long nick;
1394 char *dpos = *dposp, *cp2;
1395 int deltasec, error = 0;
1396
1397 if (len == (3 * NFSX_UNSIGNED)) {
1398 nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
1399 ktvin.tv_sec = *tl++;
1400 ktvin.tv_usec = *tl++;
1401 nick = fxdr_unsigned(u_long, *tl);
1402
1403 /*
1404 * Decrypt the timestamp in ecb mode.
1405 */
1406 #if NFSKERB
1407 XXX
1408 #endif
1409 ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
1410 ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
1411 microtime(&now);
1412 deltasec = now.tv_sec - ktvout.tv_sec;
1413 if (deltasec < 0)
1414 deltasec = -deltasec;
1415 /*
1416 * If ok, add it to the hash list for the mount point.
1417 */
1418 if (deltasec <= NFS_KERBCLOCKSKEW) {
1419 if (nmp->nm_numuids < nuidhash_max) {
1420 nmp->nm_numuids++;
1421 MALLOC_ZONE(nuidp, struct nfsuid *,
1422 sizeof (struct nfsuid),
1423 M_NFSUID, M_WAITOK);
1424 } else {
1425 nuidp = nmp->nm_uidlruhead.tqh_first;
1426 LIST_REMOVE(nuidp, nu_hash);
1427 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
1428 nu_lru);
1429 }
1430 nuidp->nu_flag = 0;
1431 nuidp->nu_cr.cr_uid = cred->cr_uid;
1432 nuidp->nu_expire = now.tv_sec + NFS_KERBTTL;
1433 nuidp->nu_timestamp = ktvout;
1434 nuidp->nu_nickname = nick;
1435 bcopy(key, nuidp->nu_key, sizeof (key));
1436 TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
1437 nu_lru);
1438 LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
1439 nuidp, nu_hash);
1440 }
1441 } else
1442 nfsm_adv(nfsm_rndup(len));
1443 nfsmout:
1444 *mdp = md;
1445 *dposp = dpos;
1446 return (error);
1447 }
1448
1449 #ifndef NFS_NOSERVER
1450
1451 /*
1452 * Derefence a server socket structure. If it has no more references and
1453 * is no longer valid, you can throw it away.
1454 */
1455 void
1456 nfsrv_slpderef(slp)
1457 register struct nfssvc_sock *slp;
1458 {
1459 if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
1460 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
1461 _FREE((caddr_t)slp, M_NFSSVC);
1462 }
1463 }
1464
1465 /*
1466 * Lock a socket against others.
1467 */
1468 int
1469 nfs_slplock(slp, wait)
1470 register struct nfssvc_sock *slp;
1471 int wait;
1472 {
1473 int *statep = &slp->ns_solock;
1474
1475 if (!wait && (*statep & NFSSTA_SNDLOCK))
1476 return(0); /* already locked, fail */
1477 while (*statep & NFSSTA_SNDLOCK) {
1478 *statep |= NFSSTA_WANTSND;
1479 (void) tsleep((caddr_t)statep, PZERO - 1, "nfsslplck", 0);
1480 }
1481 *statep |= NFSSTA_SNDLOCK;
1482 return (1);
1483 }
1484
1485 /*
1486 * Unlock the stream socket for others.
1487 */
1488 void
1489 nfs_slpunlock(slp)
1490 struct nfssvc_sock *slp;
1491 {
1492 int *statep = &slp->ns_solock;
1493
1494 if ((*statep & NFSSTA_SNDLOCK) == 0)
1495 panic("nfs slpunlock");
1496 *statep &= ~NFSSTA_SNDLOCK;
1497 if (*statep & NFSSTA_WANTSND) {
1498 *statep &= ~NFSSTA_WANTSND;
1499 wakeup((caddr_t)statep);
1500 }
1501 }
1502
1503 /*
1504 * Initialize the data structures for the server.
1505 * Handshake with any new nfsds starting up to avoid any chance of
1506 * corruption.
1507 */
1508 void
1509 nfsrv_init(terminating)
1510 int terminating;
1511 {
1512 register struct nfssvc_sock *slp, *nslp;
1513
1514 if (nfssvc_sockhead_flag & SLP_INIT)
1515 panic("nfsd init");
1516 nfssvc_sockhead_flag |= SLP_INIT;
1517 if (terminating) {
1518 for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) {
1519 nslp = slp->ns_chain.tqe_next;
1520 if (slp->ns_flag & SLP_VALID)
1521 nfsrv_zapsock(slp);
1522 TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
1523 _FREE((caddr_t)slp, M_NFSSVC);
1524 }
1525 nfsrv_cleancache(); /* And clear out server cache */
1526 /* XXX CSM 12/4/97 Revisit when enabling WebNFS */
1527 #ifdef notyet
1528 } else
1529 nfs_pub.np_valid = 0;
1530 #else
1531 }
1532 #endif
1533
1534 TAILQ_INIT(&nfssvc_sockhead);
1535 nfssvc_sockhead_flag &= ~SLP_INIT;
1536 if (nfssvc_sockhead_flag & SLP_WANTINIT) {
1537 nfssvc_sockhead_flag &= ~SLP_WANTINIT;
1538 wakeup((caddr_t)&nfssvc_sockhead);
1539 }
1540
1541 TAILQ_INIT(&nfsd_head);
1542 nfsd_head_flag &= ~NFSD_CHECKSLP;
1543
1544 MALLOC(nfs_udpsock, struct nfssvc_sock *, sizeof(struct nfssvc_sock),
1545 M_NFSSVC, M_WAITOK);
1546 bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
1547 TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
1548 TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);
1549
1550 MALLOC(nfs_cltpsock, struct nfssvc_sock *, sizeof(struct nfssvc_sock),
1551 M_NFSSVC, M_WAITOK);
1552 bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
1553 TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
1554 TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
1555 }
1556
1557 /*
1558 * Add entries to the server monitor log.
1559 */
1560 static void
1561 nfsd_rt(sotype, nd, cacherep)
1562 int sotype;
1563 register struct nfsrv_descript *nd;
1564 int cacherep;
1565 {
1566 register struct drt *rt;
1567 struct timeval now;
1568
1569 rt = &nfsdrt.drt[nfsdrt.pos];
1570 if (cacherep == RC_DOIT)
1571 rt->flag = 0;
1572 else if (cacherep == RC_REPLY)
1573 rt->flag = DRT_CACHEREPLY;
1574 else
1575 rt->flag = DRT_CACHEDROP;
1576 if (sotype == SOCK_STREAM)
1577 rt->flag |= DRT_TCP;
1578 if (nd->nd_flag & ND_NQNFS)
1579 rt->flag |= DRT_NQNFS;
1580 else if (nd->nd_flag & ND_NFSV3)
1581 rt->flag |= DRT_NFSV3;
1582 rt->proc = nd->nd_procnum;
1583 if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET)
1584 rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr;
1585 else
1586 rt->ipadr = INADDR_ANY;
1587 microuptime(&now);
1588 rt->resptime = ((now.tv_sec - nd->nd_starttime.tv_sec) * 1000000) +
1589 (now.tv_usec - nd->nd_starttime.tv_usec);
1590 microtime(&rt->tstamp); // XXX unused
1591 nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
1592 }
1593 #endif /* NFS_NOSERVER */
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