Add missing prototype (fixes warning).
[dragonfly.git] / sys / vfs / nfs / nfs_subs.c
CommitLineData
984263bc
MD
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_subs.c 8.8 (Berkeley) 5/22/95
37 * $FreeBSD: src/sys/nfs/nfs_subs.c,v 1.90.2.2 2001/10/25 19:18:53 dillon Exp $
1de703da 38 * $DragonFly: src/sys/vfs/nfs/nfs_subs.c,v 1.2 2003/06/17 04:28:54 dillon Exp $
984263bc
MD
39 */
40
41/*
42 * These functions support the macros and help fiddle mbuf chains for
43 * the nfs op functions. They do things like create the rpc header and
44 * copy data between mbuf chains and uio lists.
45 */
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/kernel.h>
49#include <sys/buf.h>
50#include <sys/proc.h>
51#include <sys/mount.h>
52#include <sys/vnode.h>
53#include <sys/namei.h>
54#include <sys/mbuf.h>
55#include <sys/socket.h>
56#include <sys/stat.h>
57#include <sys/malloc.h>
58#include <sys/sysent.h>
59#include <sys/syscall.h>
60#include <sys/conf.h>
61
62#include <vm/vm.h>
63#include <vm/vm_object.h>
64#include <vm/vm_extern.h>
65#include <vm/vm_zone.h>
66
67#include <nfs/rpcv2.h>
68#include <nfs/nfsproto.h>
69#include <nfs/nfs.h>
70#include <nfs/nfsnode.h>
71#include <nfs/xdr_subs.h>
72#include <nfs/nfsm_subs.h>
73#include <nfs/nfsmount.h>
74#include <nfs/nqnfs.h>
75#include <nfs/nfsrtt.h>
76
77#include <netinet/in.h>
78
79/*
80 * Data items converted to xdr at startup, since they are constant
81 * This is kinda hokey, but may save a little time doing byte swaps
82 */
83u_int32_t nfs_xdrneg1;
84u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
85 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted,
86 rpc_auth_kerb;
87u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false;
88
89/* And other global data */
90static u_int32_t nfs_xid = 0;
91static enum vtype nv2tov_type[8]= {
92 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
93};
94enum vtype nv3tov_type[8]= {
95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO
96};
97
98int nfs_ticks;
99int nfs_pbuf_freecnt = -1; /* start out unlimited */
100
101struct nfs_reqq nfs_reqq;
102struct nfssvc_sockhead nfssvc_sockhead;
103int nfssvc_sockhead_flag;
104struct nfsd_head nfsd_head;
105int nfsd_head_flag;
106struct nfs_bufq nfs_bufq;
107struct nqtimerhead nqtimerhead;
108struct nqfhhashhead *nqfhhashtbl;
109u_long nqfhhash;
110
111static void (*nfs_prev_lease_updatetime) __P((int));
112static int nfs_prev_nfssvc_sy_narg;
113static sy_call_t *nfs_prev_nfssvc_sy_call;
114
115#ifndef NFS_NOSERVER
116
117static vop_t *nfs_prev_vop_lease_check;
118
119/*
120 * Mapping of old NFS Version 2 RPC numbers to generic numbers.
121 */
122int nfsv3_procid[NFS_NPROCS] = {
123 NFSPROC_NULL,
124 NFSPROC_GETATTR,
125 NFSPROC_SETATTR,
126 NFSPROC_NOOP,
127 NFSPROC_LOOKUP,
128 NFSPROC_READLINK,
129 NFSPROC_READ,
130 NFSPROC_NOOP,
131 NFSPROC_WRITE,
132 NFSPROC_CREATE,
133 NFSPROC_REMOVE,
134 NFSPROC_RENAME,
135 NFSPROC_LINK,
136 NFSPROC_SYMLINK,
137 NFSPROC_MKDIR,
138 NFSPROC_RMDIR,
139 NFSPROC_READDIR,
140 NFSPROC_FSSTAT,
141 NFSPROC_NOOP,
142 NFSPROC_NOOP,
143 NFSPROC_NOOP,
144 NFSPROC_NOOP,
145 NFSPROC_NOOP,
146 NFSPROC_NOOP,
147 NFSPROC_NOOP,
148 NFSPROC_NOOP
149};
150
151#endif /* NFS_NOSERVER */
152/*
153 * and the reverse mapping from generic to Version 2 procedure numbers
154 */
155int nfsv2_procid[NFS_NPROCS] = {
156 NFSV2PROC_NULL,
157 NFSV2PROC_GETATTR,
158 NFSV2PROC_SETATTR,
159 NFSV2PROC_LOOKUP,
160 NFSV2PROC_NOOP,
161 NFSV2PROC_READLINK,
162 NFSV2PROC_READ,
163 NFSV2PROC_WRITE,
164 NFSV2PROC_CREATE,
165 NFSV2PROC_MKDIR,
166 NFSV2PROC_SYMLINK,
167 NFSV2PROC_CREATE,
168 NFSV2PROC_REMOVE,
169 NFSV2PROC_RMDIR,
170 NFSV2PROC_RENAME,
171 NFSV2PROC_LINK,
172 NFSV2PROC_READDIR,
173 NFSV2PROC_NOOP,
174 NFSV2PROC_STATFS,
175 NFSV2PROC_NOOP,
176 NFSV2PROC_NOOP,
177 NFSV2PROC_NOOP,
178 NFSV2PROC_NOOP,
179 NFSV2PROC_NOOP,
180 NFSV2PROC_NOOP,
181 NFSV2PROC_NOOP,
182};
183
184#ifndef NFS_NOSERVER
185/*
186 * Maps errno values to nfs error numbers.
187 * Use NFSERR_IO as the catch all for ones not specifically defined in
188 * RFC 1094.
189 */
190static u_char nfsrv_v2errmap[ELAST] = {
191 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO,
192 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
193 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO,
194 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR,
195 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
196 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS,
197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
198 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
201 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
202 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
203 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO,
204 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE,
205 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
206 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
207 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
208 NFSERR_IO /* << Last is 86 */
209};
210
211/*
212 * Maps errno values to nfs error numbers.
213 * Although it is not obvious whether or not NFS clients really care if
214 * a returned error value is in the specified list for the procedure, the
215 * safest thing to do is filter them appropriately. For Version 2, the
216 * X/Open XNFS document is the only specification that defines error values
217 * for each RPC (The RFC simply lists all possible error values for all RPCs),
218 * so I have decided to not do this for Version 2.
219 * The first entry is the default error return and the rest are the valid
220 * errors for that RPC in increasing numeric order.
221 */
222static short nfsv3err_null[] = {
223 0,
224 0,
225};
226
227static short nfsv3err_getattr[] = {
228 NFSERR_IO,
229 NFSERR_IO,
230 NFSERR_STALE,
231 NFSERR_BADHANDLE,
232 NFSERR_SERVERFAULT,
233 0,
234};
235
236static short nfsv3err_setattr[] = {
237 NFSERR_IO,
238 NFSERR_PERM,
239 NFSERR_IO,
240 NFSERR_ACCES,
241 NFSERR_INVAL,
242 NFSERR_NOSPC,
243 NFSERR_ROFS,
244 NFSERR_DQUOT,
245 NFSERR_STALE,
246 NFSERR_BADHANDLE,
247 NFSERR_NOT_SYNC,
248 NFSERR_SERVERFAULT,
249 0,
250};
251
252static short nfsv3err_lookup[] = {
253 NFSERR_IO,
254 NFSERR_NOENT,
255 NFSERR_IO,
256 NFSERR_ACCES,
257 NFSERR_NOTDIR,
258 NFSERR_NAMETOL,
259 NFSERR_STALE,
260 NFSERR_BADHANDLE,
261 NFSERR_SERVERFAULT,
262 0,
263};
264
265static short nfsv3err_access[] = {
266 NFSERR_IO,
267 NFSERR_IO,
268 NFSERR_STALE,
269 NFSERR_BADHANDLE,
270 NFSERR_SERVERFAULT,
271 0,
272};
273
274static short nfsv3err_readlink[] = {
275 NFSERR_IO,
276 NFSERR_IO,
277 NFSERR_ACCES,
278 NFSERR_INVAL,
279 NFSERR_STALE,
280 NFSERR_BADHANDLE,
281 NFSERR_NOTSUPP,
282 NFSERR_SERVERFAULT,
283 0,
284};
285
286static short nfsv3err_read[] = {
287 NFSERR_IO,
288 NFSERR_IO,
289 NFSERR_NXIO,
290 NFSERR_ACCES,
291 NFSERR_INVAL,
292 NFSERR_STALE,
293 NFSERR_BADHANDLE,
294 NFSERR_SERVERFAULT,
295 0,
296};
297
298static short nfsv3err_write[] = {
299 NFSERR_IO,
300 NFSERR_IO,
301 NFSERR_ACCES,
302 NFSERR_INVAL,
303 NFSERR_FBIG,
304 NFSERR_NOSPC,
305 NFSERR_ROFS,
306 NFSERR_DQUOT,
307 NFSERR_STALE,
308 NFSERR_BADHANDLE,
309 NFSERR_SERVERFAULT,
310 0,
311};
312
313static short nfsv3err_create[] = {
314 NFSERR_IO,
315 NFSERR_IO,
316 NFSERR_ACCES,
317 NFSERR_EXIST,
318 NFSERR_NOTDIR,
319 NFSERR_NOSPC,
320 NFSERR_ROFS,
321 NFSERR_NAMETOL,
322 NFSERR_DQUOT,
323 NFSERR_STALE,
324 NFSERR_BADHANDLE,
325 NFSERR_NOTSUPP,
326 NFSERR_SERVERFAULT,
327 0,
328};
329
330static short nfsv3err_mkdir[] = {
331 NFSERR_IO,
332 NFSERR_IO,
333 NFSERR_ACCES,
334 NFSERR_EXIST,
335 NFSERR_NOTDIR,
336 NFSERR_NOSPC,
337 NFSERR_ROFS,
338 NFSERR_NAMETOL,
339 NFSERR_DQUOT,
340 NFSERR_STALE,
341 NFSERR_BADHANDLE,
342 NFSERR_NOTSUPP,
343 NFSERR_SERVERFAULT,
344 0,
345};
346
347static short nfsv3err_symlink[] = {
348 NFSERR_IO,
349 NFSERR_IO,
350 NFSERR_ACCES,
351 NFSERR_EXIST,
352 NFSERR_NOTDIR,
353 NFSERR_NOSPC,
354 NFSERR_ROFS,
355 NFSERR_NAMETOL,
356 NFSERR_DQUOT,
357 NFSERR_STALE,
358 NFSERR_BADHANDLE,
359 NFSERR_NOTSUPP,
360 NFSERR_SERVERFAULT,
361 0,
362};
363
364static short nfsv3err_mknod[] = {
365 NFSERR_IO,
366 NFSERR_IO,
367 NFSERR_ACCES,
368 NFSERR_EXIST,
369 NFSERR_NOTDIR,
370 NFSERR_NOSPC,
371 NFSERR_ROFS,
372 NFSERR_NAMETOL,
373 NFSERR_DQUOT,
374 NFSERR_STALE,
375 NFSERR_BADHANDLE,
376 NFSERR_NOTSUPP,
377 NFSERR_SERVERFAULT,
378 NFSERR_BADTYPE,
379 0,
380};
381
382static short nfsv3err_remove[] = {
383 NFSERR_IO,
384 NFSERR_NOENT,
385 NFSERR_IO,
386 NFSERR_ACCES,
387 NFSERR_NOTDIR,
388 NFSERR_ROFS,
389 NFSERR_NAMETOL,
390 NFSERR_STALE,
391 NFSERR_BADHANDLE,
392 NFSERR_SERVERFAULT,
393 0,
394};
395
396static short nfsv3err_rmdir[] = {
397 NFSERR_IO,
398 NFSERR_NOENT,
399 NFSERR_IO,
400 NFSERR_ACCES,
401 NFSERR_EXIST,
402 NFSERR_NOTDIR,
403 NFSERR_INVAL,
404 NFSERR_ROFS,
405 NFSERR_NAMETOL,
406 NFSERR_NOTEMPTY,
407 NFSERR_STALE,
408 NFSERR_BADHANDLE,
409 NFSERR_NOTSUPP,
410 NFSERR_SERVERFAULT,
411 0,
412};
413
414static short nfsv3err_rename[] = {
415 NFSERR_IO,
416 NFSERR_NOENT,
417 NFSERR_IO,
418 NFSERR_ACCES,
419 NFSERR_EXIST,
420 NFSERR_XDEV,
421 NFSERR_NOTDIR,
422 NFSERR_ISDIR,
423 NFSERR_INVAL,
424 NFSERR_NOSPC,
425 NFSERR_ROFS,
426 NFSERR_MLINK,
427 NFSERR_NAMETOL,
428 NFSERR_NOTEMPTY,
429 NFSERR_DQUOT,
430 NFSERR_STALE,
431 NFSERR_BADHANDLE,
432 NFSERR_NOTSUPP,
433 NFSERR_SERVERFAULT,
434 0,
435};
436
437static short nfsv3err_link[] = {
438 NFSERR_IO,
439 NFSERR_IO,
440 NFSERR_ACCES,
441 NFSERR_EXIST,
442 NFSERR_XDEV,
443 NFSERR_NOTDIR,
444 NFSERR_INVAL,
445 NFSERR_NOSPC,
446 NFSERR_ROFS,
447 NFSERR_MLINK,
448 NFSERR_NAMETOL,
449 NFSERR_DQUOT,
450 NFSERR_STALE,
451 NFSERR_BADHANDLE,
452 NFSERR_NOTSUPP,
453 NFSERR_SERVERFAULT,
454 0,
455};
456
457static short nfsv3err_readdir[] = {
458 NFSERR_IO,
459 NFSERR_IO,
460 NFSERR_ACCES,
461 NFSERR_NOTDIR,
462 NFSERR_STALE,
463 NFSERR_BADHANDLE,
464 NFSERR_BAD_COOKIE,
465 NFSERR_TOOSMALL,
466 NFSERR_SERVERFAULT,
467 0,
468};
469
470static short nfsv3err_readdirplus[] = {
471 NFSERR_IO,
472 NFSERR_IO,
473 NFSERR_ACCES,
474 NFSERR_NOTDIR,
475 NFSERR_STALE,
476 NFSERR_BADHANDLE,
477 NFSERR_BAD_COOKIE,
478 NFSERR_NOTSUPP,
479 NFSERR_TOOSMALL,
480 NFSERR_SERVERFAULT,
481 0,
482};
483
484static short nfsv3err_fsstat[] = {
485 NFSERR_IO,
486 NFSERR_IO,
487 NFSERR_STALE,
488 NFSERR_BADHANDLE,
489 NFSERR_SERVERFAULT,
490 0,
491};
492
493static short nfsv3err_fsinfo[] = {
494 NFSERR_STALE,
495 NFSERR_STALE,
496 NFSERR_BADHANDLE,
497 NFSERR_SERVERFAULT,
498 0,
499};
500
501static short nfsv3err_pathconf[] = {
502 NFSERR_STALE,
503 NFSERR_STALE,
504 NFSERR_BADHANDLE,
505 NFSERR_SERVERFAULT,
506 0,
507};
508
509static short nfsv3err_commit[] = {
510 NFSERR_IO,
511 NFSERR_IO,
512 NFSERR_STALE,
513 NFSERR_BADHANDLE,
514 NFSERR_SERVERFAULT,
515 0,
516};
517
518static short *nfsrv_v3errmap[] = {
519 nfsv3err_null,
520 nfsv3err_getattr,
521 nfsv3err_setattr,
522 nfsv3err_lookup,
523 nfsv3err_access,
524 nfsv3err_readlink,
525 nfsv3err_read,
526 nfsv3err_write,
527 nfsv3err_create,
528 nfsv3err_mkdir,
529 nfsv3err_symlink,
530 nfsv3err_mknod,
531 nfsv3err_remove,
532 nfsv3err_rmdir,
533 nfsv3err_rename,
534 nfsv3err_link,
535 nfsv3err_readdir,
536 nfsv3err_readdirplus,
537 nfsv3err_fsstat,
538 nfsv3err_fsinfo,
539 nfsv3err_pathconf,
540 nfsv3err_commit,
541};
542
543#endif /* NFS_NOSERVER */
544
545extern struct nfsrtt nfsrtt;
546extern time_t nqnfsstarttime;
547extern int nqsrv_clockskew;
548extern int nqsrv_writeslack;
549extern int nqsrv_maxlease;
550extern struct nfsstats nfsstats;
551extern int nqnfs_piggy[NFS_NPROCS];
552extern nfstype nfsv2_type[9];
553extern nfstype nfsv3_type[9];
554extern struct nfsnodehashhead *nfsnodehashtbl;
555extern u_long nfsnodehash;
556
557struct nfssvc_args;
558extern int nfssvc(struct proc *, struct nfssvc_args *, int *);
559
560LIST_HEAD(nfsnodehashhead, nfsnode);
561
562int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *));
563
564u_quad_t
565nfs_curusec()
566{
567 struct timeval tv;
568
569 getmicrotime(&tv);
570 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec);
571}
572
573/*
574 * Create the header for an rpc request packet
575 * The hsiz is the size of the rest of the nfs request header.
576 * (just used to decide if a cluster is a good idea)
577 */
578struct mbuf *
579nfsm_reqh(vp, procid, hsiz, bposp)
580 struct vnode *vp;
581 u_long procid;
582 int hsiz;
583 caddr_t *bposp;
584{
585 register struct mbuf *mb;
586 register u_int32_t *tl;
587 register caddr_t bpos;
588 struct mbuf *mb2;
589 struct nfsmount *nmp;
590 int nqflag;
591
592 MGET(mb, M_WAIT, MT_DATA);
593 if (hsiz >= MINCLSIZE)
594 MCLGET(mb, M_WAIT);
595 mb->m_len = 0;
596 bpos = mtod(mb, caddr_t);
597
598 /*
599 * For NQNFS, add lease request.
600 */
601 if (vp) {
602 nmp = VFSTONFS(vp->v_mount);
603 if (nmp->nm_flag & NFSMNT_NQNFS) {
604 nqflag = NQNFS_NEEDLEASE(vp, procid);
605 if (nqflag) {
606 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED);
607 *tl++ = txdr_unsigned(nqflag);
608 *tl = txdr_unsigned(nmp->nm_leaseterm);
609 } else {
610 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
611 *tl = 0;
612 }
613 }
614 }
615 /* Finally, return values */
616 *bposp = bpos;
617 return (mb);
618}
619
620/*
621 * Build the RPC header and fill in the authorization info.
622 * The authorization string argument is only used when the credentials
623 * come from outside of the kernel.
624 * Returns the head of the mbuf list.
625 */
626struct mbuf *
627nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len,
628 verf_str, mrest, mrest_len, mbp, xidp)
629 register struct ucred *cr;
630 int nmflag;
631 int procid;
632 int auth_type;
633 int auth_len;
634 char *auth_str;
635 int verf_len;
636 char *verf_str;
637 struct mbuf *mrest;
638 int mrest_len;
639 struct mbuf **mbp;
640 u_int32_t *xidp;
641{
642 register struct mbuf *mb;
643 register u_int32_t *tl;
644 register caddr_t bpos;
645 register int i;
646 struct mbuf *mreq, *mb2;
647 int siz, grpsiz, authsiz;
648
649 authsiz = nfsm_rndup(auth_len);
650 MGETHDR(mb, M_WAIT, MT_DATA);
651 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
652 MCLGET(mb, M_WAIT);
653 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
654 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
655 } else {
656 MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
657 }
658 mb->m_len = 0;
659 mreq = mb;
660 bpos = mtod(mb, caddr_t);
661
662 /*
663 * First the RPC header.
664 */
665 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
666
667 /* Get a pretty random xid to start with */
668 if (!nfs_xid)
669 nfs_xid = random();
670 /*
671 * Skip zero xid if it should ever happen.
672 */
673 if (++nfs_xid == 0)
674 nfs_xid++;
675
676 *tl++ = *xidp = txdr_unsigned(nfs_xid);
677 *tl++ = rpc_call;
678 *tl++ = rpc_vers;
679 if (nmflag & NFSMNT_NQNFS) {
680 *tl++ = txdr_unsigned(NQNFS_PROG);
681 *tl++ = txdr_unsigned(NQNFS_VER3);
682 } else {
683 *tl++ = txdr_unsigned(NFS_PROG);
684 if (nmflag & NFSMNT_NFSV3)
685 *tl++ = txdr_unsigned(NFS_VER3);
686 else
687 *tl++ = txdr_unsigned(NFS_VER2);
688 }
689 if (nmflag & NFSMNT_NFSV3)
690 *tl++ = txdr_unsigned(procid);
691 else
692 *tl++ = txdr_unsigned(nfsv2_procid[procid]);
693
694 /*
695 * And then the authorization cred.
696 */
697 *tl++ = txdr_unsigned(auth_type);
698 *tl = txdr_unsigned(authsiz);
699 switch (auth_type) {
700 case RPCAUTH_UNIX:
701 nfsm_build(tl, u_int32_t *, auth_len);
702 *tl++ = 0; /* stamp ?? */
703 *tl++ = 0; /* NULL hostname */
704 *tl++ = txdr_unsigned(cr->cr_uid);
705 *tl++ = txdr_unsigned(cr->cr_groups[0]);
706 grpsiz = (auth_len >> 2) - 5;
707 *tl++ = txdr_unsigned(grpsiz);
708 for (i = 1; i <= grpsiz; i++)
709 *tl++ = txdr_unsigned(cr->cr_groups[i]);
710 break;
711 case RPCAUTH_KERB4:
712 siz = auth_len;
713 while (siz > 0) {
714 if (M_TRAILINGSPACE(mb) == 0) {
715 MGET(mb2, M_WAIT, MT_DATA);
716 if (siz >= MINCLSIZE)
717 MCLGET(mb2, M_WAIT);
718 mb->m_next = mb2;
719 mb = mb2;
720 mb->m_len = 0;
721 bpos = mtod(mb, caddr_t);
722 }
723 i = min(siz, M_TRAILINGSPACE(mb));
724 bcopy(auth_str, bpos, i);
725 mb->m_len += i;
726 auth_str += i;
727 bpos += i;
728 siz -= i;
729 }
730 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) {
731 for (i = 0; i < siz; i++)
732 *bpos++ = '\0';
733 mb->m_len += siz;
734 }
735 break;
736 };
737
738 /*
739 * And the verifier...
740 */
741 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
742 if (verf_str) {
743 *tl++ = txdr_unsigned(RPCAUTH_KERB4);
744 *tl = txdr_unsigned(verf_len);
745 siz = verf_len;
746 while (siz > 0) {
747 if (M_TRAILINGSPACE(mb) == 0) {
748 MGET(mb2, M_WAIT, MT_DATA);
749 if (siz >= MINCLSIZE)
750 MCLGET(mb2, M_WAIT);
751 mb->m_next = mb2;
752 mb = mb2;
753 mb->m_len = 0;
754 bpos = mtod(mb, caddr_t);
755 }
756 i = min(siz, M_TRAILINGSPACE(mb));
757 bcopy(verf_str, bpos, i);
758 mb->m_len += i;
759 verf_str += i;
760 bpos += i;
761 siz -= i;
762 }
763 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) {
764 for (i = 0; i < siz; i++)
765 *bpos++ = '\0';
766 mb->m_len += siz;
767 }
768 } else {
769 *tl++ = txdr_unsigned(RPCAUTH_NULL);
770 *tl = 0;
771 }
772 mb->m_next = mrest;
773 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
774 mreq->m_pkthdr.rcvif = (struct ifnet *)0;
775 *mbp = mb;
776 return (mreq);
777}
778
779/*
780 * copies mbuf chain to the uio scatter/gather list
781 */
782int
783nfsm_mbuftouio(mrep, uiop, siz, dpos)
784 struct mbuf **mrep;
785 register struct uio *uiop;
786 int siz;
787 caddr_t *dpos;
788{
789 register char *mbufcp, *uiocp;
790 register int xfer, left, len;
791 register struct mbuf *mp;
792 long uiosiz, rem;
793 int error = 0;
794
795 mp = *mrep;
796 mbufcp = *dpos;
797 len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
798 rem = nfsm_rndup(siz)-siz;
799 while (siz > 0) {
800 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
801 return (EFBIG);
802 left = uiop->uio_iov->iov_len;
803 uiocp = uiop->uio_iov->iov_base;
804 if (left > siz)
805 left = siz;
806 uiosiz = left;
807 while (left > 0) {
808 while (len == 0) {
809 mp = mp->m_next;
810 if (mp == NULL)
811 return (EBADRPC);
812 mbufcp = mtod(mp, caddr_t);
813 len = mp->m_len;
814 }
815 xfer = (left > len) ? len : left;
816#ifdef notdef
817 /* Not Yet.. */
818 if (uiop->uio_iov->iov_op != NULL)
819 (*(uiop->uio_iov->iov_op))
820 (mbufcp, uiocp, xfer);
821 else
822#endif
823 if (uiop->uio_segflg == UIO_SYSSPACE)
824 bcopy(mbufcp, uiocp, xfer);
825 else
826 copyout(mbufcp, uiocp, xfer);
827 left -= xfer;
828 len -= xfer;
829 mbufcp += xfer;
830 uiocp += xfer;
831 uiop->uio_offset += xfer;
832 uiop->uio_resid -= xfer;
833 }
834 if (uiop->uio_iov->iov_len <= siz) {
835 uiop->uio_iovcnt--;
836 uiop->uio_iov++;
837 } else {
838 uiop->uio_iov->iov_base += uiosiz;
839 uiop->uio_iov->iov_len -= uiosiz;
840 }
841 siz -= uiosiz;
842 }
843 *dpos = mbufcp;
844 *mrep = mp;
845 if (rem > 0) {
846 if (len < rem)
847 error = nfs_adv(mrep, dpos, rem, len);
848 else
849 *dpos += rem;
850 }
851 return (error);
852}
853
854/*
855 * copies a uio scatter/gather list to an mbuf chain.
856 * NOTE: can ony handle iovcnt == 1
857 */
858int
859nfsm_uiotombuf(uiop, mq, siz, bpos)
860 register struct uio *uiop;
861 struct mbuf **mq;
862 int siz;
863 caddr_t *bpos;
864{
865 register char *uiocp;
866 register struct mbuf *mp, *mp2;
867 register int xfer, left, mlen;
868 int uiosiz, clflg, rem;
869 char *cp;
870
871#ifdef DIAGNOSTIC
872 if (uiop->uio_iovcnt != 1)
873 panic("nfsm_uiotombuf: iovcnt != 1");
874#endif
875
876 if (siz > MLEN) /* or should it >= MCLBYTES ?? */
877 clflg = 1;
878 else
879 clflg = 0;
880 rem = nfsm_rndup(siz)-siz;
881 mp = mp2 = *mq;
882 while (siz > 0) {
883 left = uiop->uio_iov->iov_len;
884 uiocp = uiop->uio_iov->iov_base;
885 if (left > siz)
886 left = siz;
887 uiosiz = left;
888 while (left > 0) {
889 mlen = M_TRAILINGSPACE(mp);
890 if (mlen == 0) {
891 MGET(mp, M_WAIT, MT_DATA);
892 if (clflg)
893 MCLGET(mp, M_WAIT);
894 mp->m_len = 0;
895 mp2->m_next = mp;
896 mp2 = mp;
897 mlen = M_TRAILINGSPACE(mp);
898 }
899 xfer = (left > mlen) ? mlen : left;
900#ifdef notdef
901 /* Not Yet.. */
902 if (uiop->uio_iov->iov_op != NULL)
903 (*(uiop->uio_iov->iov_op))
904 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
905 else
906#endif
907 if (uiop->uio_segflg == UIO_SYSSPACE)
908 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
909 else
910 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
911 mp->m_len += xfer;
912 left -= xfer;
913 uiocp += xfer;
914 uiop->uio_offset += xfer;
915 uiop->uio_resid -= xfer;
916 }
917 uiop->uio_iov->iov_base += uiosiz;
918 uiop->uio_iov->iov_len -= uiosiz;
919 siz -= uiosiz;
920 }
921 if (rem > 0) {
922 if (rem > M_TRAILINGSPACE(mp)) {
923 MGET(mp, M_WAIT, MT_DATA);
924 mp->m_len = 0;
925 mp2->m_next = mp;
926 }
927 cp = mtod(mp, caddr_t)+mp->m_len;
928 for (left = 0; left < rem; left++)
929 *cp++ = '\0';
930 mp->m_len += rem;
931 *bpos = cp;
932 } else
933 *bpos = mtod(mp, caddr_t)+mp->m_len;
934 *mq = mp;
935 return (0);
936}
937
938/*
939 * Help break down an mbuf chain by setting the first siz bytes contiguous
940 * pointed to by returned val.
941 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough
942 * cases. (The macros use the vars. dpos and dpos2)
943 */
944int
945nfsm_disct(mdp, dposp, siz, left, cp2)
946 struct mbuf **mdp;
947 caddr_t *dposp;
948 int siz;
949 int left;
950 caddr_t *cp2;
951{
952 register struct mbuf *mp, *mp2;
953 register int siz2, xfer;
954 register caddr_t p;
955
956 mp = *mdp;
957 while (left == 0) {
958 *mdp = mp = mp->m_next;
959 if (mp == NULL)
960 return (EBADRPC);
961 left = mp->m_len;
962 *dposp = mtod(mp, caddr_t);
963 }
964 if (left >= siz) {
965 *cp2 = *dposp;
966 *dposp += siz;
967 } else if (mp->m_next == NULL) {
968 return (EBADRPC);
969 } else if (siz > MHLEN) {
970 panic("nfs S too big");
971 } else {
972 MGET(mp2, M_WAIT, MT_DATA);
973 mp2->m_next = mp->m_next;
974 mp->m_next = mp2;
975 mp->m_len -= left;
976 mp = mp2;
977 *cp2 = p = mtod(mp, caddr_t);
978 bcopy(*dposp, p, left); /* Copy what was left */
979 siz2 = siz-left;
980 p += left;
981 mp2 = mp->m_next;
982 /* Loop around copying up the siz2 bytes */
983 while (siz2 > 0) {
984 if (mp2 == NULL)
985 return (EBADRPC);
986 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2;
987 if (xfer > 0) {
988 bcopy(mtod(mp2, caddr_t), p, xfer);
989 NFSMADV(mp2, xfer);
990 mp2->m_len -= xfer;
991 p += xfer;
992 siz2 -= xfer;
993 }
994 if (siz2 > 0)
995 mp2 = mp2->m_next;
996 }
997 mp->m_len = siz;
998 *mdp = mp2;
999 *dposp = mtod(mp2, caddr_t);
1000 }
1001 return (0);
1002}
1003
1004/*
1005 * Advance the position in the mbuf chain.
1006 */
1007int
1008nfs_adv(mdp, dposp, offs, left)
1009 struct mbuf **mdp;
1010 caddr_t *dposp;
1011 int offs;
1012 int left;
1013{
1014 register struct mbuf *m;
1015 register int s;
1016
1017 m = *mdp;
1018 s = left;
1019 while (s < offs) {
1020 offs -= s;
1021 m = m->m_next;
1022 if (m == NULL)
1023 return (EBADRPC);
1024 s = m->m_len;
1025 }
1026 *mdp = m;
1027 *dposp = mtod(m, caddr_t)+offs;
1028 return (0);
1029}
1030
1031/*
1032 * Copy a string into mbufs for the hard cases...
1033 */
1034int
1035nfsm_strtmbuf(mb, bpos, cp, siz)
1036 struct mbuf **mb;
1037 char **bpos;
1038 const char *cp;
1039 long siz;
1040{
1041 register struct mbuf *m1 = NULL, *m2;
1042 long left, xfer, len, tlen;
1043 u_int32_t *tl;
1044 int putsize;
1045
1046 putsize = 1;
1047 m2 = *mb;
1048 left = M_TRAILINGSPACE(m2);
1049 if (left > 0) {
1050 tl = ((u_int32_t *)(*bpos));
1051 *tl++ = txdr_unsigned(siz);
1052 putsize = 0;
1053 left -= NFSX_UNSIGNED;
1054 m2->m_len += NFSX_UNSIGNED;
1055 if (left > 0) {
1056 bcopy(cp, (caddr_t) tl, left);
1057 siz -= left;
1058 cp += left;
1059 m2->m_len += left;
1060 left = 0;
1061 }
1062 }
1063 /* Loop around adding mbufs */
1064 while (siz > 0) {
1065 MGET(m1, M_WAIT, MT_DATA);
1066 if (siz > MLEN)
1067 MCLGET(m1, M_WAIT);
1068 m1->m_len = NFSMSIZ(m1);
1069 m2->m_next = m1;
1070 m2 = m1;
1071 tl = mtod(m1, u_int32_t *);
1072 tlen = 0;
1073 if (putsize) {
1074 *tl++ = txdr_unsigned(siz);
1075 m1->m_len -= NFSX_UNSIGNED;
1076 tlen = NFSX_UNSIGNED;
1077 putsize = 0;
1078 }
1079 if (siz < m1->m_len) {
1080 len = nfsm_rndup(siz);
1081 xfer = siz;
1082 if (xfer < len)
1083 *(tl+(xfer>>2)) = 0;
1084 } else {
1085 xfer = len = m1->m_len;
1086 }
1087 bcopy(cp, (caddr_t) tl, xfer);
1088 m1->m_len = len+tlen;
1089 siz -= xfer;
1090 cp += xfer;
1091 }
1092 *mb = m1;
1093 *bpos = mtod(m1, caddr_t)+m1->m_len;
1094 return (0);
1095}
1096
1097/*
1098 * Called once to initialize data structures...
1099 */
1100int
1101nfs_init(vfsp)
1102 struct vfsconf *vfsp;
1103{
1104 register int i;
1105
1106 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1);
1107
1108 nfs_mount_type = vfsp->vfc_typenum;
1109 nfsrtt.pos = 0;
1110 rpc_vers = txdr_unsigned(RPC_VER2);
1111 rpc_call = txdr_unsigned(RPC_CALL);
1112 rpc_reply = txdr_unsigned(RPC_REPLY);
1113 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
1114 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
1115 rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
1116 rpc_autherr = txdr_unsigned(RPC_AUTHERR);
1117 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
1118 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4);
1119 nfs_prog = txdr_unsigned(NFS_PROG);
1120 nqnfs_prog = txdr_unsigned(NQNFS_PROG);
1121 nfs_true = txdr_unsigned(TRUE);
1122 nfs_false = txdr_unsigned(FALSE);
1123 nfs_xdrneg1 = txdr_unsigned(-1);
1124 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
1125 if (nfs_ticks < 1)
1126 nfs_ticks = 1;
1127 /* Ensure async daemons disabled */
1128 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
1129 nfs_iodwant[i] = (struct proc *)0;
1130 nfs_iodmount[i] = (struct nfsmount *)0;
1131 }
1132 nfs_nhinit(); /* Init the nfsnode table */
1133#ifndef NFS_NOSERVER
1134 nfsrv_init(0); /* Init server data structures */
1135 nfsrv_initcache(); /* Init the server request cache */
1136#endif
1137
1138 /*
1139 * Initialize the nqnfs server stuff.
1140 */
1141 if (nqnfsstarttime == 0) {
1142 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease
1143 + nqsrv_clockskew + nqsrv_writeslack;
1144 NQLOADNOVRAM(nqnfsstarttime);
1145 CIRCLEQ_INIT(&nqtimerhead);
1146 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash);
1147 }
1148
1149 /*
1150 * Initialize reply list and start timer
1151 */
1152 TAILQ_INIT(&nfs_reqq);
1153
1154 nfs_timer(0);
1155
1156 /*
1157 * Set up lease_check and lease_updatetime so that other parts
1158 * of the system can call us, if we are loadable.
1159 */
1160#ifndef NFS_NOSERVER
1161 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)];
1162 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check;
1163#endif
1164 nfs_prev_lease_updatetime = lease_updatetime;
1165 lease_updatetime = nfs_lease_updatetime;
1166 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg;
1167 sysent[SYS_nfssvc].sy_narg = 2;
1168 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call;
1169 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc;
1170
1171 nfs_pbuf_freecnt = nswbuf / 2 + 1;
1172
1173 return (0);
1174}
1175
1176int
1177nfs_uninit(vfsp)
1178 struct vfsconf *vfsp;
1179{
1180
1181 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle);
1182 nfs_mount_type = -1;
1183#ifndef NFS_NOSERVER
1184 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check;
1185#endif
1186 lease_updatetime = nfs_prev_lease_updatetime;
1187 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg;
1188 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call;
1189 return (0);
1190}
1191
1192/*
1193 * Attribute cache routines.
1194 * nfs_loadattrcache() - loads or updates the cache contents from attributes
1195 * that are on the mbuf list
1196 * nfs_getattrcache() - returns valid attributes if found in cache, returns
1197 * error otherwise
1198 */
1199
1200/*
1201 * Load the attribute cache (that lives in the nfsnode entry) with
1202 * the values on the mbuf list and
1203 * Iff vap not NULL
1204 * copy the attributes to *vaper
1205 */
1206int
1207nfs_loadattrcache(vpp, mdp, dposp, vaper, dontshrink)
1208 struct vnode **vpp;
1209 struct mbuf **mdp;
1210 caddr_t *dposp;
1211 struct vattr *vaper;
1212 int dontshrink;
1213{
1214 register struct vnode *vp = *vpp;
1215 register struct vattr *vap;
1216 register struct nfs_fattr *fp;
1217 register struct nfsnode *np;
1218 register int32_t t1;
1219 caddr_t cp2;
1220 int error = 0, rdev;
1221 struct mbuf *md;
1222 enum vtype vtyp;
1223 u_short vmode;
1224 struct timespec mtime;
1225 int v3 = NFS_ISV3(vp);
1226
1227 md = *mdp;
1228 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
1229 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0)
1230 return (error);
1231 fp = (struct nfs_fattr *)cp2;
1232 if (v3) {
1233 vtyp = nfsv3tov_type(fp->fa_type);
1234 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1235 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
1236 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
1237 fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
1238 } else {
1239 vtyp = nfsv2tov_type(fp->fa_type);
1240 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1241 /*
1242 * XXX
1243 *
1244 * The duplicate information returned in fa_type and fa_mode
1245 * is an ambiguity in the NFS version 2 protocol.
1246 *
1247 * VREG should be taken literally as a regular file. If a
1248 * server intents to return some type information differently
1249 * in the upper bits of the mode field (e.g. for sockets, or
1250 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
1251 * leave the examination of the mode bits even in the VREG
1252 * case to avoid breakage for bogus servers, but we make sure
1253 * that there are actually type bits set in the upper part of
1254 * fa_mode (and failing that, trust the va_type field).
1255 *
1256 * NFSv3 cleared the issue, and requires fa_mode to not
1257 * contain any type information (while also introduing sockets
1258 * and FIFOs for fa_type).
1259 */
1260 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
1261 vtyp = IFTOVT(vmode);
1262 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
1263 fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
1264
1265 /*
1266 * Really ugly NFSv2 kludge.
1267 */
1268 if (vtyp == VCHR && rdev == 0xffffffff)
1269 vtyp = VFIFO;
1270 }
1271
1272 /*
1273 * If v_type == VNON it is a new node, so fill in the v_type,
1274 * n_mtime fields. Check to see if it represents a special
1275 * device, and if so, check for a possible alias. Once the
1276 * correct vnode has been obtained, fill in the rest of the
1277 * information.
1278 */
1279 np = VTONFS(vp);
1280 if (vp->v_type != vtyp) {
1281 vp->v_type = vtyp;
1282 if (vp->v_type == VFIFO) {
1283 vp->v_op = fifo_nfsv2nodeop_p;
1284 }
1285 if (vp->v_type == VCHR || vp->v_type == VBLK) {
1286 vp->v_op = spec_nfsv2nodeop_p;
1287 addaliasu(vp, rdev);
1288 }
1289 np->n_mtime = mtime.tv_sec;
1290 }
1291 vap = &np->n_vattr;
1292 vap->va_type = vtyp;
1293 vap->va_mode = (vmode & 07777);
1294 vap->va_rdev = rdev;
1295 vap->va_mtime = mtime;
1296 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
1297 if (v3) {
1298 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1299 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1300 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1301 vap->va_size = fxdr_hyper(&fp->fa3_size);
1302 vap->va_blocksize = NFS_FABLKSIZE;
1303 vap->va_bytes = fxdr_hyper(&fp->fa3_used);
1304 vap->va_fileid = fxdr_unsigned(int32_t,
1305 fp->fa3_fileid.nfsuquad[1]);
1306 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
1307 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
1308 vap->va_flags = 0;
1309 vap->va_filerev = 0;
1310 } else {
1311 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1312 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1313 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1314 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
1315 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
1316 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks)
1317 * NFS_FABLKSIZE;
1318 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
1319 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
1320 vap->va_flags = 0;
1321 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
1322 fp->fa2_ctime.nfsv2_sec);
1323 vap->va_ctime.tv_nsec = 0;
1324 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
1325 vap->va_filerev = 0;
1326 }
1327 np->n_attrstamp = time_second;
1328 if (vap->va_size != np->n_size) {
1329 if (vap->va_type == VREG) {
1330 if (dontshrink && vap->va_size < np->n_size) {
1331 /*
1332 * We've been told not to shrink the file;
1333 * zero np->n_attrstamp to indicate that
1334 * the attributes are stale.
1335 */
1336 vap->va_size = np->n_size;
1337 np->n_attrstamp = 0;
1338 } else if (np->n_flag & NMODIFIED) {
1339 if (vap->va_size < np->n_size)
1340 vap->va_size = np->n_size;
1341 else
1342 np->n_size = vap->va_size;
1343 } else {
1344 np->n_size = vap->va_size;
1345 }
1346 vnode_pager_setsize(vp, np->n_size);
1347 } else {
1348 np->n_size = vap->va_size;
1349 }
1350 }
1351 if (vaper != NULL) {
1352 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
1353 if (np->n_flag & NCHG) {
1354 if (np->n_flag & NACC)
1355 vaper->va_atime = np->n_atim;
1356 if (np->n_flag & NUPD)
1357 vaper->va_mtime = np->n_mtim;
1358 }
1359 }
1360 return (0);
1361}
1362
1363#ifdef NFS_ACDEBUG
1364#include <sys/sysctl.h>
1365SYSCTL_DECL(_vfs_nfs);
1366static int nfs_acdebug;
1367SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
1368#endif
1369
1370/*
1371 * Check the time stamp
1372 * If the cache is valid, copy contents to *vap and return 0
1373 * otherwise return an error
1374 */
1375int
1376nfs_getattrcache(vp, vaper)
1377 register struct vnode *vp;
1378 struct vattr *vaper;
1379{
1380 register struct nfsnode *np;
1381 register struct vattr *vap;
1382 struct nfsmount *nmp;
1383 int timeo;
1384
1385 np = VTONFS(vp);
1386 vap = &np->n_vattr;
1387 nmp = VFSTONFS(vp->v_mount);
1388 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
1389 timeo = (time_second - np->n_mtime) / 10;
1390
1391#ifdef NFS_ACDEBUG
1392 if (nfs_acdebug>1)
1393 printf("nfs_getattrcache: initial timeo = %d\n", timeo);
1394#endif
1395
1396 if (vap->va_type == VDIR) {
1397 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
1398 timeo = nmp->nm_acdirmin;
1399 else if (timeo > nmp->nm_acdirmax)
1400 timeo = nmp->nm_acdirmax;
1401 } else {
1402 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
1403 timeo = nmp->nm_acregmin;
1404 else if (timeo > nmp->nm_acregmax)
1405 timeo = nmp->nm_acregmax;
1406 }
1407
1408#ifdef NFS_ACDEBUG
1409 if (nfs_acdebug > 2)
1410 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
1411 nmp->nm_acregmin, nmp->nm_acregmax,
1412 nmp->nm_acdirmin, nmp->nm_acdirmax);
1413
1414 if (nfs_acdebug)
1415 printf("nfs_getattrcache: age = %d; final timeo = %d\n",
1416 (time_second - np->n_attrstamp), timeo);
1417#endif
1418
1419 if ((time_second - np->n_attrstamp) >= timeo) {
1420 nfsstats.attrcache_misses++;
1421 return (ENOENT);
1422 }
1423 nfsstats.attrcache_hits++;
1424 if (vap->va_size != np->n_size) {
1425 if (vap->va_type == VREG) {
1426 if (np->n_flag & NMODIFIED) {
1427 if (vap->va_size < np->n_size)
1428 vap->va_size = np->n_size;
1429 else
1430 np->n_size = vap->va_size;
1431 } else {
1432 np->n_size = vap->va_size;
1433 }
1434 vnode_pager_setsize(vp, np->n_size);
1435 } else {
1436 np->n_size = vap->va_size;
1437 }
1438 }
1439 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
1440 if (np->n_flag & NCHG) {
1441 if (np->n_flag & NACC)
1442 vaper->va_atime = np->n_atim;
1443 if (np->n_flag & NUPD)
1444 vaper->va_mtime = np->n_mtim;
1445 }
1446 return (0);
1447}
1448
1449#ifndef NFS_NOSERVER
1450/*
1451 * Set up nameidata for a lookup() call and do it.
1452 *
1453 * If pubflag is set, this call is done for a lookup operation on the
1454 * public filehandle. In that case we allow crossing mountpoints and
1455 * absolute pathnames. However, the caller is expected to check that
1456 * the lookup result is within the public fs, and deny access if
1457 * it is not.
1458 *
1459 * nfs_namei() clears out garbage fields that namei() might leave garbage.
1460 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no
1461 * error occurs but the parent was not requested.
1462 *
1463 * dirp may be set whether an error is returned or not, and must be
1464 * released by the caller.
1465 */
1466int
1467nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag)
1468 register struct nameidata *ndp;
1469 fhandle_t *fhp;
1470 int len;
1471 struct nfssvc_sock *slp;
1472 struct sockaddr *nam;
1473 struct mbuf **mdp;
1474 caddr_t *dposp;
1475 struct vnode **retdirp;
1476 struct proc *p;
1477 int kerbflag, pubflag;
1478{
1479 register int i, rem;
1480 register struct mbuf *md;
1481 register char *fromcp, *tocp, *cp;
1482 struct iovec aiov;
1483 struct uio auio;
1484 struct vnode *dp;
1485 int error, rdonly, linklen;
1486 struct componentname *cnp = &ndp->ni_cnd;
1487
1488 *retdirp = (struct vnode *)0;
1489 cnp->cn_pnbuf = zalloc(namei_zone);
1490
1491 /*
1492 * Copy the name from the mbuf list to ndp->ni_pnbuf
1493 * and set the various ndp fields appropriately.
1494 */
1495 fromcp = *dposp;
1496 tocp = cnp->cn_pnbuf;
1497 md = *mdp;
1498 rem = mtod(md, caddr_t) + md->m_len - fromcp;
1499 for (i = 0; i < len; i++) {
1500 while (rem == 0) {
1501 md = md->m_next;
1502 if (md == NULL) {
1503 error = EBADRPC;
1504 goto out;
1505 }
1506 fromcp = mtod(md, caddr_t);
1507 rem = md->m_len;
1508 }
1509 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) {
1510 error = EACCES;
1511 goto out;
1512 }
1513 *tocp++ = *fromcp++;
1514 rem--;
1515 }
1516 *tocp = '\0';
1517 *mdp = md;
1518 *dposp = fromcp;
1519 len = nfsm_rndup(len)-len;
1520 if (len > 0) {
1521 if (rem >= len)
1522 *dposp += len;
1523 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0)
1524 goto out;
1525 }
1526
1527 /*
1528 * Extract and set starting directory.
1529 */
1530 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp,
1531 nam, &rdonly, kerbflag, pubflag);
1532 if (error)
1533 goto out;
1534 if (dp->v_type != VDIR) {
1535 vrele(dp);
1536 error = ENOTDIR;
1537 goto out;
1538 }
1539
1540 if (rdonly)
1541 cnp->cn_flags |= RDONLY;
1542
1543 /*
1544 * Set return directory. Reference to dp is implicitly transfered
1545 * to the returned pointer
1546 */
1547 *retdirp = dp;
1548
1549 if (pubflag) {
1550 /*
1551 * Oh joy. For WebNFS, handle those pesky '%' escapes,
1552 * and the 'native path' indicator.
1553 */
1554 cp = zalloc(namei_zone);
1555 fromcp = cnp->cn_pnbuf;
1556 tocp = cp;
1557 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) {
1558 switch ((unsigned char)*fromcp) {
1559 case WEBNFS_NATIVE_CHAR:
1560 /*
1561 * 'Native' path for us is the same
1562 * as a path according to the NFS spec,
1563 * just skip the escape char.
1564 */
1565 fromcp++;
1566 break;
1567 /*
1568 * More may be added in the future, range 0x80-0xff
1569 */
1570 default:
1571 error = EIO;
1572 zfree(namei_zone, cp);
1573 goto out;
1574 }
1575 }
1576 /*
1577 * Translate the '%' escapes, URL-style.
1578 */
1579 while (*fromcp != '\0') {
1580 if (*fromcp == WEBNFS_ESC_CHAR) {
1581 if (fromcp[1] != '\0' && fromcp[2] != '\0') {
1582 fromcp++;
1583 *tocp++ = HEXSTRTOI(fromcp);
1584 fromcp += 2;
1585 continue;
1586 } else {
1587 error = ENOENT;
1588 zfree(namei_zone, cp);
1589 goto out;
1590 }
1591 } else
1592 *tocp++ = *fromcp++;
1593 }
1594 *tocp = '\0';
1595 zfree(namei_zone, cnp->cn_pnbuf);
1596 cnp->cn_pnbuf = cp;
1597 }
1598
1599 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1;
1600 ndp->ni_segflg = UIO_SYSSPACE;
1601
1602 if (pubflag) {
1603 ndp->ni_rootdir = rootvnode;
1604 ndp->ni_loopcnt = 0;
1605 if (cnp->cn_pnbuf[0] == '/')
1606 dp = rootvnode;
1607 } else {
1608 cnp->cn_flags |= NOCROSSMOUNT;
1609 }
1610
1611 /*
1612 * Initialize for scan, set ni_startdir and bump ref on dp again
1613 * becuase lookup() will dereference ni_startdir.
1614 */
1615
1616 cnp->cn_proc = p;
1617 VREF(dp);
1618 ndp->ni_startdir = dp;
1619
1620 for (;;) {
1621 cnp->cn_nameptr = cnp->cn_pnbuf;
1622 /*
1623 * Call lookup() to do the real work. If an error occurs,
1624 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and
1625 * we do not have to dereference anything before returning.
1626 * In either case ni_startdir will be dereferenced and NULLed
1627 * out.
1628 */
1629 error = lookup(ndp);
1630 if (error)
1631 break;
1632
1633 /*
1634 * Check for encountering a symbolic link. Trivial
1635 * termination occurs if no symlink encountered.
1636 * Note: zfree is safe because error is 0, so we will
1637 * not zfree it again when we break.
1638 */
1639 if ((cnp->cn_flags & ISSYMLINK) == 0) {
1640 nfsrv_object_create(ndp->ni_vp);
1641 if (cnp->cn_flags & (SAVENAME | SAVESTART))
1642 cnp->cn_flags |= HASBUF;
1643 else
1644 zfree(namei_zone, cnp->cn_pnbuf);
1645 break;
1646 }
1647
1648 /*
1649 * Validate symlink
1650 */
1651 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
1652 VOP_UNLOCK(ndp->ni_dvp, 0, p);
1653 if (!pubflag) {
1654 error = EINVAL;
1655 goto badlink2;
1656 }
1657
1658 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
1659 error = ELOOP;
1660 goto badlink2;
1661 }
1662 if (ndp->ni_pathlen > 1)
1663 cp = zalloc(namei_zone);
1664 else
1665 cp = cnp->cn_pnbuf;
1666 aiov.iov_base = cp;
1667 aiov.iov_len = MAXPATHLEN;
1668 auio.uio_iov = &aiov;
1669 auio.uio_iovcnt = 1;
1670 auio.uio_offset = 0;
1671 auio.uio_rw = UIO_READ;
1672 auio.uio_segflg = UIO_SYSSPACE;
1673 auio.uio_procp = (struct proc *)0;
1674 auio.uio_resid = MAXPATHLEN;
1675 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
1676 if (error) {
1677 badlink1:
1678 if (ndp->ni_pathlen > 1)
1679 zfree(namei_zone, cp);
1680 badlink2:
1681 vrele(ndp->ni_dvp);
1682 vput(ndp->ni_vp);
1683 break;
1684 }
1685 linklen = MAXPATHLEN - auio.uio_resid;
1686 if (linklen == 0) {
1687 error = ENOENT;
1688 goto badlink1;
1689 }
1690 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
1691 error = ENAMETOOLONG;
1692 goto badlink1;
1693 }
1694
1695 /*
1696 * Adjust or replace path
1697 */
1698 if (ndp->ni_pathlen > 1) {
1699 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
1700 zfree(namei_zone, cnp->cn_pnbuf);
1701 cnp->cn_pnbuf = cp;
1702 } else
1703 cnp->cn_pnbuf[linklen] = '\0';
1704 ndp->ni_pathlen += linklen;
1705
1706 /*
1707 * Cleanup refs for next loop and check if root directory
1708 * should replace current directory. Normally ni_dvp
1709 * becomes the new base directory and is cleaned up when
1710 * we loop. Explicitly null pointers after invalidation
1711 * to clarify operation.
1712 */
1713 vput(ndp->ni_vp);
1714 ndp->ni_vp = NULL;
1715
1716 if (cnp->cn_pnbuf[0] == '/') {
1717 vrele(ndp->ni_dvp);
1718 ndp->ni_dvp = ndp->ni_rootdir;
1719 VREF(ndp->ni_dvp);
1720 }
1721 ndp->ni_startdir = ndp->ni_dvp;
1722 ndp->ni_dvp = NULL;
1723 }
1724
1725 /*
1726 * nfs_namei() guarentees that fields will not contain garbage
1727 * whether an error occurs or not. This allows the caller to track
1728 * cleanup state trivially.
1729 */
1730out:
1731 if (error) {
1732 zfree(namei_zone, cnp->cn_pnbuf);
1733 ndp->ni_vp = NULL;
1734 ndp->ni_dvp = NULL;
1735 ndp->ni_startdir = NULL;
1736 cnp->cn_flags &= ~HASBUF;
1737 } else if ((ndp->ni_cnd.cn_flags & (WANTPARENT|LOCKPARENT)) == 0) {
1738 ndp->ni_dvp = NULL;
1739 }
1740 return (error);
1741}
1742
1743/*
1744 * A fiddled version of m_adj() that ensures null fill to a long
1745 * boundary and only trims off the back end
1746 */
1747void
1748nfsm_adj(mp, len, nul)
1749 struct mbuf *mp;
1750 register int len;
1751 int nul;
1752{
1753 register struct mbuf *m;
1754 register int count, i;
1755 register char *cp;
1756
1757 /*
1758 * Trim from tail. Scan the mbuf chain,
1759 * calculating its length and finding the last mbuf.
1760 * If the adjustment only affects this mbuf, then just
1761 * adjust and return. Otherwise, rescan and truncate
1762 * after the remaining size.
1763 */
1764 count = 0;
1765 m = mp;
1766 for (;;) {
1767 count += m->m_len;
1768 if (m->m_next == (struct mbuf *)0)
1769 break;
1770 m = m->m_next;
1771 }
1772 if (m->m_len > len) {
1773 m->m_len -= len;
1774 if (nul > 0) {
1775 cp = mtod(m, caddr_t)+m->m_len-nul;
1776 for (i = 0; i < nul; i++)
1777 *cp++ = '\0';
1778 }
1779 return;
1780 }
1781 count -= len;
1782 if (count < 0)
1783 count = 0;
1784 /*
1785 * Correct length for chain is "count".
1786 * Find the mbuf with last data, adjust its length,
1787 * and toss data from remaining mbufs on chain.
1788 */
1789 for (m = mp; m; m = m->m_next) {
1790 if (m->m_len >= count) {
1791 m->m_len = count;
1792 if (nul > 0) {
1793 cp = mtod(m, caddr_t)+m->m_len-nul;
1794 for (i = 0; i < nul; i++)
1795 *cp++ = '\0';
1796 }
1797 break;
1798 }
1799 count -= m->m_len;
1800 }
1801 for (m = m->m_next;m;m = m->m_next)
1802 m->m_len = 0;
1803}
1804
1805/*
1806 * Make these functions instead of macros, so that the kernel text size
1807 * doesn't get too big...
1808 */
1809void
1810nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp)
1811 struct nfsrv_descript *nfsd;
1812 int before_ret;
1813 register struct vattr *before_vap;
1814 int after_ret;
1815 struct vattr *after_vap;
1816 struct mbuf **mbp;
1817 char **bposp;
1818{
1819 register struct mbuf *mb = *mbp, *mb2;
1820 register char *bpos = *bposp;
1821 register u_int32_t *tl;
1822
1823 if (before_ret) {
1824 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1825 *tl = nfs_false;
1826 } else {
1827 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
1828 *tl++ = nfs_true;
1829 txdr_hyper(before_vap->va_size, tl);
1830 tl += 2;
1831 txdr_nfsv3time(&(before_vap->va_mtime), tl);
1832 tl += 2;
1833 txdr_nfsv3time(&(before_vap->va_ctime), tl);
1834 }
1835 *bposp = bpos;
1836 *mbp = mb;
1837 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
1838}
1839
1840void
1841nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp)
1842 struct nfsrv_descript *nfsd;
1843 int after_ret;
1844 struct vattr *after_vap;
1845 struct mbuf **mbp;
1846 char **bposp;
1847{
1848 register struct mbuf *mb = *mbp, *mb2;
1849 register char *bpos = *bposp;
1850 register u_int32_t *tl;
1851 register struct nfs_fattr *fp;
1852
1853 if (after_ret) {
1854 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1855 *tl = nfs_false;
1856 } else {
1857 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR);
1858 *tl++ = nfs_true;
1859 fp = (struct nfs_fattr *)tl;
1860 nfsm_srvfattr(nfsd, after_vap, fp);
1861 }
1862 *mbp = mb;
1863 *bposp = bpos;
1864}
1865
1866void
1867nfsm_srvfattr(nfsd, vap, fp)
1868 register struct nfsrv_descript *nfsd;
1869 register struct vattr *vap;
1870 register struct nfs_fattr *fp;
1871{
1872
1873 fp->fa_nlink = txdr_unsigned(vap->va_nlink);
1874 fp->fa_uid = txdr_unsigned(vap->va_uid);
1875 fp->fa_gid = txdr_unsigned(vap->va_gid);
1876 if (nfsd->nd_flag & ND_NFSV3) {
1877 fp->fa_type = vtonfsv3_type(vap->va_type);
1878 fp->fa_mode = vtonfsv3_mode(vap->va_mode);
1879 txdr_hyper(vap->va_size, &fp->fa3_size);
1880 txdr_hyper(vap->va_bytes, &fp->fa3_used);
1881 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev));
1882 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev));
1883 fp->fa3_fsid.nfsuquad[0] = 0;
1884 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
1885 fp->fa3_fileid.nfsuquad[0] = 0;
1886 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
1887 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
1888 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
1889 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
1890 } else {
1891 fp->fa_type = vtonfsv2_type(vap->va_type);
1892 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1893 fp->fa2_size = txdr_unsigned(vap->va_size);
1894 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
1895 if (vap->va_type == VFIFO)
1896 fp->fa2_rdev = 0xffffffff;
1897 else
1898 fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
1899 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
1900 fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
1901 fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
1902 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
1903 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
1904 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
1905 }
1906}
1907
1908/*
1909 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
1910 * - look up fsid in mount list (if not found ret error)
1911 * - get vp and export rights by calling VFS_FHTOVP()
1912 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
1913 * - if not lockflag unlock it with VOP_UNLOCK()
1914 */
1915int
1916nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag)
1917 fhandle_t *fhp;
1918 int lockflag;
1919 struct vnode **vpp;
1920 struct ucred *cred;
1921 struct nfssvc_sock *slp;
1922 struct sockaddr *nam;
1923 int *rdonlyp;
1924 int kerbflag;
1925 int pubflag;
1926{
1927 struct proc *p = curproc; /* XXX */
1928 register struct mount *mp;
1929 register int i;
1930 struct ucred *credanon;
1931 int error, exflags;
1932#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */
1933 struct sockaddr_int *saddr;
1934#endif
1935
1936 *vpp = (struct vnode *)0;
1937
1938 if (nfs_ispublicfh(fhp)) {
1939 if (!pubflag || !nfs_pub.np_valid)
1940 return (ESTALE);
1941 fhp = &nfs_pub.np_handle;
1942 }
1943
1944 mp = vfs_getvfs(&fhp->fh_fsid);
1945 if (!mp)
1946 return (ESTALE);
1947 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon);
1948 if (error)
1949 return (error);
1950 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp);
1951 if (error)
1952 return (error);
1953#ifdef MNT_EXNORESPORT
1954 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) {
1955 saddr = (struct sockaddr_in *)nam;
1956 if (saddr->sin_family == AF_INET &&
1957 ntohs(saddr->sin_port) >= IPPORT_RESERVED) {
1958 vput(*vpp);
1959 *vpp = NULL;
1960 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1961 }
1962 }
1963#endif
1964 /*
1965 * Check/setup credentials.
1966 */
1967 if (exflags & MNT_EXKERB) {
1968 if (!kerbflag) {
1969 vput(*vpp);
1970 *vpp = NULL;
1971 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1972 }
1973 } else if (kerbflag) {
1974 vput(*vpp);
1975 *vpp = NULL;
1976 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1977 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
1978 cred->cr_uid = credanon->cr_uid;
1979 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++)
1980 cred->cr_groups[i] = credanon->cr_groups[i];
1981 cred->cr_ngroups = i;
1982 }
1983 if (exflags & MNT_EXRDONLY)
1984 *rdonlyp = 1;
1985 else
1986 *rdonlyp = 0;
1987
1988 nfsrv_object_create(*vpp);
1989
1990 if (!lockflag)
1991 VOP_UNLOCK(*vpp, 0, p);
1992 return (0);
1993}
1994
1995
1996/*
1997 * WebNFS: check if a filehandle is a public filehandle. For v3, this
1998 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has
1999 * transformed this to all zeroes in both cases, so check for it.
2000 */
2001int
2002nfs_ispublicfh(fhp)
2003 fhandle_t *fhp;
2004{
2005 char *cp = (char *)fhp;
2006 int i;
2007
2008 for (i = 0; i < NFSX_V3FH; i++)
2009 if (*cp++ != 0)
2010 return (FALSE);
2011 return (TRUE);
2012}
2013
2014#endif /* NFS_NOSERVER */
2015/*
2016 * This function compares two net addresses by family and returns TRUE
2017 * if they are the same host.
2018 * If there is any doubt, return FALSE.
2019 * The AF_INET family is handled as a special case so that address mbufs
2020 * don't need to be saved to store "struct in_addr", which is only 4 bytes.
2021 */
2022int
2023netaddr_match(family, haddr, nam)
2024 int family;
2025 union nethostaddr *haddr;
2026 struct sockaddr *nam;
2027{
2028 register struct sockaddr_in *inetaddr;
2029
2030 switch (family) {
2031 case AF_INET:
2032 inetaddr = (struct sockaddr_in *)nam;
2033 if (inetaddr->sin_family == AF_INET &&
2034 inetaddr->sin_addr.s_addr == haddr->had_inetaddr)
2035 return (1);
2036 break;
2037 default:
2038 break;
2039 };
2040 return (0);
2041}
2042
2043static nfsuint64 nfs_nullcookie = { { 0, 0 } };
2044/*
2045 * This function finds the directory cookie that corresponds to the
2046 * logical byte offset given.
2047 */
2048nfsuint64 *
2049nfs_getcookie(np, off, add)
2050 register struct nfsnode *np;
2051 off_t off;
2052 int add;
2053{
2054 register struct nfsdmap *dp, *dp2;
2055 register int pos;
2056
2057 pos = (uoff_t)off / NFS_DIRBLKSIZ;
2058 if (pos == 0 || off < 0) {
2059#ifdef DIAGNOSTIC
2060 if (add)
2061 panic("nfs getcookie add at <= 0");
2062#endif
2063 return (&nfs_nullcookie);
2064 }
2065 pos--;
2066 dp = np->n_cookies.lh_first;
2067 if (!dp) {
2068 if (add) {
2069 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
2070 M_NFSDIROFF, M_WAITOK);
2071 dp->ndm_eocookie = 0;
2072 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
2073 } else
2074 return ((nfsuint64 *)0);
2075 }
2076 while (pos >= NFSNUMCOOKIES) {
2077 pos -= NFSNUMCOOKIES;
2078 if (dp->ndm_list.le_next) {
2079 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
2080 pos >= dp->ndm_eocookie)
2081 return ((nfsuint64 *)0);
2082 dp = dp->ndm_list.le_next;
2083 } else if (add) {
2084 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
2085 M_NFSDIROFF, M_WAITOK);
2086 dp2->ndm_eocookie = 0;
2087 LIST_INSERT_AFTER(dp, dp2, ndm_list);
2088 dp = dp2;
2089 } else
2090 return ((nfsuint64 *)0);
2091 }
2092 if (pos >= dp->ndm_eocookie) {
2093 if (add)
2094 dp->ndm_eocookie = pos + 1;
2095 else
2096 return ((nfsuint64 *)0);
2097 }
2098 return (&dp->ndm_cookies[pos]);
2099}
2100
2101/*
2102 * Invalidate cached directory information, except for the actual directory
2103 * blocks (which are invalidated separately).
2104 * Done mainly to avoid the use of stale offset cookies.
2105 */
2106void
2107nfs_invaldir(vp)
2108 register struct vnode *vp;
2109{
2110 register struct nfsnode *np = VTONFS(vp);
2111
2112#ifdef DIAGNOSTIC
2113 if (vp->v_type != VDIR)
2114 panic("nfs: invaldir not dir");
2115#endif
2116 np->n_direofoffset = 0;
2117 np->n_cookieverf.nfsuquad[0] = 0;
2118 np->n_cookieverf.nfsuquad[1] = 0;
2119 if (np->n_cookies.lh_first)
2120 np->n_cookies.lh_first->ndm_eocookie = 0;
2121}
2122
2123/*
2124 * The write verifier has changed (probably due to a server reboot), so all
2125 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the
2126 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
2127 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the
2128 * mount point.
2129 *
2130 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data
2131 * writes are not clusterable.
2132 */
2133void
2134nfs_clearcommit(mp)
2135 struct mount *mp;
2136{
2137 register struct vnode *vp, *nvp;
2138 register struct buf *bp, *nbp;
2139 int s;
2140
2141 s = splbio();
2142loop:
2143 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) {
2144 if (vp->v_mount != mp) /* Paranoia */
2145 goto loop;
2146 nvp = TAILQ_NEXT(vp, v_nmntvnodes);
2147 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2148 nbp = TAILQ_NEXT(bp, b_vnbufs);
2149 if (BUF_REFCNT(bp) == 0 &&
2150 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2151 == (B_DELWRI | B_NEEDCOMMIT))
2152 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2153 }
2154 }
2155 splx(s);
2156}
2157
2158#ifndef NFS_NOSERVER
2159/*
2160 * Map errnos to NFS error numbers. For Version 3 also filter out error
2161 * numbers not specified for the associated procedure.
2162 */
2163int
2164nfsrv_errmap(nd, err)
2165 struct nfsrv_descript *nd;
2166 register int err;
2167{
2168 register short *defaulterrp, *errp;
2169
2170 if (nd->nd_flag & ND_NFSV3) {
2171 if (nd->nd_procnum <= NFSPROC_COMMIT) {
2172 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
2173 while (*++errp) {
2174 if (*errp == err)
2175 return (err);
2176 else if (*errp > err)
2177 break;
2178 }
2179 return ((int)*defaulterrp);
2180 } else
2181 return (err & 0xffff);
2182 }
2183 if (err <= ELAST)
2184 return ((int)nfsrv_v2errmap[err - 1]);
2185 return (NFSERR_IO);
2186}
2187
2188int
2189nfsrv_object_create(vp)
2190 struct vnode *vp;
2191{
2192
2193 if (vp == NULL || vp->v_type != VREG)
2194 return (1);
2195 return (vfs_object_create(vp, curproc,
2196 curproc ? curproc->p_ucred : NULL));
2197}
2198
2199/*
2200 * Sort the group list in increasing numerical order.
2201 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort
2202 * that used to be here.)
2203 */
2204void
2205nfsrvw_sort(list, num)
2206 register gid_t *list;
2207 register int num;
2208{
2209 register int i, j;
2210 gid_t v;
2211
2212 /* Insertion sort. */
2213 for (i = 1; i < num; i++) {
2214 v = list[i];
2215 /* find correct slot for value v, moving others up */
2216 for (j = i; --j >= 0 && v < list[j];)
2217 list[j + 1] = list[j];
2218 list[j + 1] = v;
2219 }
2220}
2221
2222/*
2223 * copy credentials making sure that the result can be compared with bcmp().
2224 */
2225void
2226nfsrv_setcred(incred, outcred)
2227 register struct ucred *incred, *outcred;
2228{
2229 register int i;
2230
2231 bzero((caddr_t)outcred, sizeof (struct ucred));
2232 outcred->cr_ref = 1;
2233 outcred->cr_uid = incred->cr_uid;
2234 outcred->cr_ngroups = incred->cr_ngroups;
2235 for (i = 0; i < incred->cr_ngroups; i++)
2236 outcred->cr_groups[i] = incred->cr_groups[i];
2237 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups);
2238}
2239#endif /* NFS_NOSERVER */