namecache work stage 3a: Adjust the VFS APIs to include a namecache pointer
[dragonfly.git] / sys / vfs / nfs / nfs_subs.c
CommitLineData
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1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)nfs_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 $
2b69e610 38 * $DragonFly: src/sys/vfs/nfs/nfs_subs.c,v 1.9 2003/09/23 05:03:53 dillon Exp $
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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
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67#include <sys/buf2.h>
68
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69#include "rpcv2.h"
70#include "nfsproto.h"
71#include "nfs.h"
72#include "nfsnode.h"
73#include "xdr_subs.h"
74#include "nfsm_subs.h"
75#include "nfsmount.h"
76#include "nqnfs.h"
77#include "nfsrtt.h"
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78
79#include <netinet/in.h>
80
81/*
82 * Data items converted to xdr at startup, since they are constant
83 * This is kinda hokey, but may save a little time doing byte swaps
84 */
85u_int32_t nfs_xdrneg1;
86u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
87 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted,
88 rpc_auth_kerb;
89u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false;
90
91/* And other global data */
92static u_int32_t nfs_xid = 0;
93static enum vtype nv2tov_type[8]= {
94 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
95};
96enum vtype nv3tov_type[8]= {
97 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO
98};
99
100int nfs_ticks;
101int nfs_pbuf_freecnt = -1; /* start out unlimited */
102
103struct nfs_reqq nfs_reqq;
104struct nfssvc_sockhead nfssvc_sockhead;
105int nfssvc_sockhead_flag;
106struct nfsd_head nfsd_head;
107int nfsd_head_flag;
108struct nfs_bufq nfs_bufq;
109struct nqtimerhead nqtimerhead;
110struct nqfhhashhead *nqfhhashtbl;
111u_long nqfhhash;
112
a6ee311a 113static void (*nfs_prev_lease_updatetime) (int);
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114static int nfs_prev_nfssvc_sy_narg;
115static sy_call_t *nfs_prev_nfssvc_sy_call;
116
117#ifndef NFS_NOSERVER
118
119static vop_t *nfs_prev_vop_lease_check;
120
121/*
122 * Mapping of old NFS Version 2 RPC numbers to generic numbers.
123 */
124int nfsv3_procid[NFS_NPROCS] = {
125 NFSPROC_NULL,
126 NFSPROC_GETATTR,
127 NFSPROC_SETATTR,
128 NFSPROC_NOOP,
129 NFSPROC_LOOKUP,
130 NFSPROC_READLINK,
131 NFSPROC_READ,
132 NFSPROC_NOOP,
133 NFSPROC_WRITE,
134 NFSPROC_CREATE,
135 NFSPROC_REMOVE,
136 NFSPROC_RENAME,
137 NFSPROC_LINK,
138 NFSPROC_SYMLINK,
139 NFSPROC_MKDIR,
140 NFSPROC_RMDIR,
141 NFSPROC_READDIR,
142 NFSPROC_FSSTAT,
143 NFSPROC_NOOP,
144 NFSPROC_NOOP,
145 NFSPROC_NOOP,
146 NFSPROC_NOOP,
147 NFSPROC_NOOP,
148 NFSPROC_NOOP,
149 NFSPROC_NOOP,
150 NFSPROC_NOOP
151};
152
153#endif /* NFS_NOSERVER */
154/*
155 * and the reverse mapping from generic to Version 2 procedure numbers
156 */
157int nfsv2_procid[NFS_NPROCS] = {
158 NFSV2PROC_NULL,
159 NFSV2PROC_GETATTR,
160 NFSV2PROC_SETATTR,
161 NFSV2PROC_LOOKUP,
162 NFSV2PROC_NOOP,
163 NFSV2PROC_READLINK,
164 NFSV2PROC_READ,
165 NFSV2PROC_WRITE,
166 NFSV2PROC_CREATE,
167 NFSV2PROC_MKDIR,
168 NFSV2PROC_SYMLINK,
169 NFSV2PROC_CREATE,
170 NFSV2PROC_REMOVE,
171 NFSV2PROC_RMDIR,
172 NFSV2PROC_RENAME,
173 NFSV2PROC_LINK,
174 NFSV2PROC_READDIR,
175 NFSV2PROC_NOOP,
176 NFSV2PROC_STATFS,
177 NFSV2PROC_NOOP,
178 NFSV2PROC_NOOP,
179 NFSV2PROC_NOOP,
180 NFSV2PROC_NOOP,
181 NFSV2PROC_NOOP,
182 NFSV2PROC_NOOP,
183 NFSV2PROC_NOOP,
184};
185
186#ifndef NFS_NOSERVER
187/*
188 * Maps errno values to nfs error numbers.
189 * Use NFSERR_IO as the catch all for ones not specifically defined in
190 * RFC 1094.
191 */
192static u_char nfsrv_v2errmap[ELAST] = {
193 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO,
194 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
195 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO,
196 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR,
197 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
198 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS,
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_IO, NFSERR_IO, NFSERR_IO,
204 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
205 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO,
206 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE,
207 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
208 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
209 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
210 NFSERR_IO /* << Last is 86 */
211};
212
213/*
214 * Maps errno values to nfs error numbers.
215 * Although it is not obvious whether or not NFS clients really care if
216 * a returned error value is in the specified list for the procedure, the
217 * safest thing to do is filter them appropriately. For Version 2, the
218 * X/Open XNFS document is the only specification that defines error values
219 * for each RPC (The RFC simply lists all possible error values for all RPCs),
220 * so I have decided to not do this for Version 2.
221 * The first entry is the default error return and the rest are the valid
222 * errors for that RPC in increasing numeric order.
223 */
224static short nfsv3err_null[] = {
225 0,
226 0,
227};
228
229static short nfsv3err_getattr[] = {
230 NFSERR_IO,
231 NFSERR_IO,
232 NFSERR_STALE,
233 NFSERR_BADHANDLE,
234 NFSERR_SERVERFAULT,
235 0,
236};
237
238static short nfsv3err_setattr[] = {
239 NFSERR_IO,
240 NFSERR_PERM,
241 NFSERR_IO,
242 NFSERR_ACCES,
243 NFSERR_INVAL,
244 NFSERR_NOSPC,
245 NFSERR_ROFS,
246 NFSERR_DQUOT,
247 NFSERR_STALE,
248 NFSERR_BADHANDLE,
249 NFSERR_NOT_SYNC,
250 NFSERR_SERVERFAULT,
251 0,
252};
253
254static short nfsv3err_lookup[] = {
255 NFSERR_IO,
256 NFSERR_NOENT,
257 NFSERR_IO,
258 NFSERR_ACCES,
259 NFSERR_NOTDIR,
260 NFSERR_NAMETOL,
261 NFSERR_STALE,
262 NFSERR_BADHANDLE,
263 NFSERR_SERVERFAULT,
264 0,
265};
266
267static short nfsv3err_access[] = {
268 NFSERR_IO,
269 NFSERR_IO,
270 NFSERR_STALE,
271 NFSERR_BADHANDLE,
272 NFSERR_SERVERFAULT,
273 0,
274};
275
276static short nfsv3err_readlink[] = {
277 NFSERR_IO,
278 NFSERR_IO,
279 NFSERR_ACCES,
280 NFSERR_INVAL,
281 NFSERR_STALE,
282 NFSERR_BADHANDLE,
283 NFSERR_NOTSUPP,
284 NFSERR_SERVERFAULT,
285 0,
286};
287
288static short nfsv3err_read[] = {
289 NFSERR_IO,
290 NFSERR_IO,
291 NFSERR_NXIO,
292 NFSERR_ACCES,
293 NFSERR_INVAL,
294 NFSERR_STALE,
295 NFSERR_BADHANDLE,
296 NFSERR_SERVERFAULT,
297 0,
298};
299
300static short nfsv3err_write[] = {
301 NFSERR_IO,
302 NFSERR_IO,
303 NFSERR_ACCES,
304 NFSERR_INVAL,
305 NFSERR_FBIG,
306 NFSERR_NOSPC,
307 NFSERR_ROFS,
308 NFSERR_DQUOT,
309 NFSERR_STALE,
310 NFSERR_BADHANDLE,
311 NFSERR_SERVERFAULT,
312 0,
313};
314
315static short nfsv3err_create[] = {
316 NFSERR_IO,
317 NFSERR_IO,
318 NFSERR_ACCES,
319 NFSERR_EXIST,
320 NFSERR_NOTDIR,
321 NFSERR_NOSPC,
322 NFSERR_ROFS,
323 NFSERR_NAMETOL,
324 NFSERR_DQUOT,
325 NFSERR_STALE,
326 NFSERR_BADHANDLE,
327 NFSERR_NOTSUPP,
328 NFSERR_SERVERFAULT,
329 0,
330};
331
332static short nfsv3err_mkdir[] = {
333 NFSERR_IO,
334 NFSERR_IO,
335 NFSERR_ACCES,
336 NFSERR_EXIST,
337 NFSERR_NOTDIR,
338 NFSERR_NOSPC,
339 NFSERR_ROFS,
340 NFSERR_NAMETOL,
341 NFSERR_DQUOT,
342 NFSERR_STALE,
343 NFSERR_BADHANDLE,
344 NFSERR_NOTSUPP,
345 NFSERR_SERVERFAULT,
346 0,
347};
348
349static short nfsv3err_symlink[] = {
350 NFSERR_IO,
351 NFSERR_IO,
352 NFSERR_ACCES,
353 NFSERR_EXIST,
354 NFSERR_NOTDIR,
355 NFSERR_NOSPC,
356 NFSERR_ROFS,
357 NFSERR_NAMETOL,
358 NFSERR_DQUOT,
359 NFSERR_STALE,
360 NFSERR_BADHANDLE,
361 NFSERR_NOTSUPP,
362 NFSERR_SERVERFAULT,
363 0,
364};
365
366static short nfsv3err_mknod[] = {
367 NFSERR_IO,
368 NFSERR_IO,
369 NFSERR_ACCES,
370 NFSERR_EXIST,
371 NFSERR_NOTDIR,
372 NFSERR_NOSPC,
373 NFSERR_ROFS,
374 NFSERR_NAMETOL,
375 NFSERR_DQUOT,
376 NFSERR_STALE,
377 NFSERR_BADHANDLE,
378 NFSERR_NOTSUPP,
379 NFSERR_SERVERFAULT,
380 NFSERR_BADTYPE,
381 0,
382};
383
384static short nfsv3err_remove[] = {
385 NFSERR_IO,
386 NFSERR_NOENT,
387 NFSERR_IO,
388 NFSERR_ACCES,
389 NFSERR_NOTDIR,
390 NFSERR_ROFS,
391 NFSERR_NAMETOL,
392 NFSERR_STALE,
393 NFSERR_BADHANDLE,
394 NFSERR_SERVERFAULT,
395 0,
396};
397
398static short nfsv3err_rmdir[] = {
399 NFSERR_IO,
400 NFSERR_NOENT,
401 NFSERR_IO,
402 NFSERR_ACCES,
403 NFSERR_EXIST,
404 NFSERR_NOTDIR,
405 NFSERR_INVAL,
406 NFSERR_ROFS,
407 NFSERR_NAMETOL,
408 NFSERR_NOTEMPTY,
409 NFSERR_STALE,
410 NFSERR_BADHANDLE,
411 NFSERR_NOTSUPP,
412 NFSERR_SERVERFAULT,
413 0,
414};
415
416static short nfsv3err_rename[] = {
417 NFSERR_IO,
418 NFSERR_NOENT,
419 NFSERR_IO,
420 NFSERR_ACCES,
421 NFSERR_EXIST,
422 NFSERR_XDEV,
423 NFSERR_NOTDIR,
424 NFSERR_ISDIR,
425 NFSERR_INVAL,
426 NFSERR_NOSPC,
427 NFSERR_ROFS,
428 NFSERR_MLINK,
429 NFSERR_NAMETOL,
430 NFSERR_NOTEMPTY,
431 NFSERR_DQUOT,
432 NFSERR_STALE,
433 NFSERR_BADHANDLE,
434 NFSERR_NOTSUPP,
435 NFSERR_SERVERFAULT,
436 0,
437};
438
439static short nfsv3err_link[] = {
440 NFSERR_IO,
441 NFSERR_IO,
442 NFSERR_ACCES,
443 NFSERR_EXIST,
444 NFSERR_XDEV,
445 NFSERR_NOTDIR,
446 NFSERR_INVAL,
447 NFSERR_NOSPC,
448 NFSERR_ROFS,
449 NFSERR_MLINK,
450 NFSERR_NAMETOL,
451 NFSERR_DQUOT,
452 NFSERR_STALE,
453 NFSERR_BADHANDLE,
454 NFSERR_NOTSUPP,
455 NFSERR_SERVERFAULT,
456 0,
457};
458
459static short nfsv3err_readdir[] = {
460 NFSERR_IO,
461 NFSERR_IO,
462 NFSERR_ACCES,
463 NFSERR_NOTDIR,
464 NFSERR_STALE,
465 NFSERR_BADHANDLE,
466 NFSERR_BAD_COOKIE,
467 NFSERR_TOOSMALL,
468 NFSERR_SERVERFAULT,
469 0,
470};
471
472static short nfsv3err_readdirplus[] = {
473 NFSERR_IO,
474 NFSERR_IO,
475 NFSERR_ACCES,
476 NFSERR_NOTDIR,
477 NFSERR_STALE,
478 NFSERR_BADHANDLE,
479 NFSERR_BAD_COOKIE,
480 NFSERR_NOTSUPP,
481 NFSERR_TOOSMALL,
482 NFSERR_SERVERFAULT,
483 0,
484};
485
486static short nfsv3err_fsstat[] = {
487 NFSERR_IO,
488 NFSERR_IO,
489 NFSERR_STALE,
490 NFSERR_BADHANDLE,
491 NFSERR_SERVERFAULT,
492 0,
493};
494
495static short nfsv3err_fsinfo[] = {
496 NFSERR_STALE,
497 NFSERR_STALE,
498 NFSERR_BADHANDLE,
499 NFSERR_SERVERFAULT,
500 0,
501};
502
503static short nfsv3err_pathconf[] = {
504 NFSERR_STALE,
505 NFSERR_STALE,
506 NFSERR_BADHANDLE,
507 NFSERR_SERVERFAULT,
508 0,
509};
510
511static short nfsv3err_commit[] = {
512 NFSERR_IO,
513 NFSERR_IO,
514 NFSERR_STALE,
515 NFSERR_BADHANDLE,
516 NFSERR_SERVERFAULT,
517 0,
518};
519
520static short *nfsrv_v3errmap[] = {
521 nfsv3err_null,
522 nfsv3err_getattr,
523 nfsv3err_setattr,
524 nfsv3err_lookup,
525 nfsv3err_access,
526 nfsv3err_readlink,
527 nfsv3err_read,
528 nfsv3err_write,
529 nfsv3err_create,
530 nfsv3err_mkdir,
531 nfsv3err_symlink,
532 nfsv3err_mknod,
533 nfsv3err_remove,
534 nfsv3err_rmdir,
535 nfsv3err_rename,
536 nfsv3err_link,
537 nfsv3err_readdir,
538 nfsv3err_readdirplus,
539 nfsv3err_fsstat,
540 nfsv3err_fsinfo,
541 nfsv3err_pathconf,
542 nfsv3err_commit,
543};
544
545#endif /* NFS_NOSERVER */
546
547extern struct nfsrtt nfsrtt;
548extern time_t nqnfsstarttime;
549extern int nqsrv_clockskew;
550extern int nqsrv_writeslack;
551extern int nqsrv_maxlease;
552extern struct nfsstats nfsstats;
553extern int nqnfs_piggy[NFS_NPROCS];
554extern nfstype nfsv2_type[9];
555extern nfstype nfsv3_type[9];
556extern struct nfsnodehashhead *nfsnodehashtbl;
557extern u_long nfsnodehash;
558
559struct nfssvc_args;
560extern int nfssvc(struct proc *, struct nfssvc_args *, int *);
561
562LIST_HEAD(nfsnodehashhead, nfsnode);
563
a6ee311a 564int nfs_webnamei (struct nameidata *, struct vnode *, struct proc *);
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565
566u_quad_t
567nfs_curusec()
568{
569 struct timeval tv;
570
571 getmicrotime(&tv);
572 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec);
573}
574
575/*
576 * Create the header for an rpc request packet
577 * The hsiz is the size of the rest of the nfs request header.
578 * (just used to decide if a cluster is a good idea)
579 */
580struct mbuf *
581nfsm_reqh(vp, procid, hsiz, bposp)
582 struct vnode *vp;
583 u_long procid;
584 int hsiz;
585 caddr_t *bposp;
586{
40393ded
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587 struct mbuf *mb;
588 u_int32_t *tl;
589 caddr_t bpos;
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590 struct mbuf *mb2;
591 struct nfsmount *nmp;
592 int nqflag;
593
594 MGET(mb, M_WAIT, MT_DATA);
595 if (hsiz >= MINCLSIZE)
596 MCLGET(mb, M_WAIT);
597 mb->m_len = 0;
598 bpos = mtod(mb, caddr_t);
599
600 /*
601 * For NQNFS, add lease request.
602 */
603 if (vp) {
604 nmp = VFSTONFS(vp->v_mount);
605 if (nmp->nm_flag & NFSMNT_NQNFS) {
606 nqflag = NQNFS_NEEDLEASE(vp, procid);
607 if (nqflag) {
608 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED);
609 *tl++ = txdr_unsigned(nqflag);
610 *tl = txdr_unsigned(nmp->nm_leaseterm);
611 } else {
612 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
613 *tl = 0;
614 }
615 }
616 }
617 /* Finally, return values */
618 *bposp = bpos;
619 return (mb);
620}
621
622/*
623 * Build the RPC header and fill in the authorization info.
624 * The authorization string argument is only used when the credentials
625 * come from outside of the kernel.
626 * Returns the head of the mbuf list.
627 */
628struct mbuf *
629nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len,
630 verf_str, mrest, mrest_len, mbp, xidp)
40393ded 631 struct ucred *cr;
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632 int nmflag;
633 int procid;
634 int auth_type;
635 int auth_len;
636 char *auth_str;
637 int verf_len;
638 char *verf_str;
639 struct mbuf *mrest;
640 int mrest_len;
641 struct mbuf **mbp;
642 u_int32_t *xidp;
643{
40393ded
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644 struct mbuf *mb;
645 u_int32_t *tl;
646 caddr_t bpos;
647 int i;
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648 struct mbuf *mreq, *mb2;
649 int siz, grpsiz, authsiz;
650
651 authsiz = nfsm_rndup(auth_len);
652 MGETHDR(mb, M_WAIT, MT_DATA);
653 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
654 MCLGET(mb, M_WAIT);
655 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
656 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
657 } else {
658 MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
659 }
660 mb->m_len = 0;
661 mreq = mb;
662 bpos = mtod(mb, caddr_t);
663
664 /*
665 * First the RPC header.
666 */
667 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
668
669 /* Get a pretty random xid to start with */
670 if (!nfs_xid)
671 nfs_xid = random();
672 /*
673 * Skip zero xid if it should ever happen.
674 */
675 if (++nfs_xid == 0)
676 nfs_xid++;
677
678 *tl++ = *xidp = txdr_unsigned(nfs_xid);
679 *tl++ = rpc_call;
680 *tl++ = rpc_vers;
681 if (nmflag & NFSMNT_NQNFS) {
682 *tl++ = txdr_unsigned(NQNFS_PROG);
683 *tl++ = txdr_unsigned(NQNFS_VER3);
684 } else {
685 *tl++ = txdr_unsigned(NFS_PROG);
686 if (nmflag & NFSMNT_NFSV3)
687 *tl++ = txdr_unsigned(NFS_VER3);
688 else
689 *tl++ = txdr_unsigned(NFS_VER2);
690 }
691 if (nmflag & NFSMNT_NFSV3)
692 *tl++ = txdr_unsigned(procid);
693 else
694 *tl++ = txdr_unsigned(nfsv2_procid[procid]);
695
696 /*
697 * And then the authorization cred.
698 */
699 *tl++ = txdr_unsigned(auth_type);
700 *tl = txdr_unsigned(authsiz);
701 switch (auth_type) {
702 case RPCAUTH_UNIX:
703 nfsm_build(tl, u_int32_t *, auth_len);
704 *tl++ = 0; /* stamp ?? */
705 *tl++ = 0; /* NULL hostname */
706 *tl++ = txdr_unsigned(cr->cr_uid);
707 *tl++ = txdr_unsigned(cr->cr_groups[0]);
708 grpsiz = (auth_len >> 2) - 5;
709 *tl++ = txdr_unsigned(grpsiz);
710 for (i = 1; i <= grpsiz; i++)
711 *tl++ = txdr_unsigned(cr->cr_groups[i]);
712 break;
713 case RPCAUTH_KERB4:
714 siz = auth_len;
715 while (siz > 0) {
716 if (M_TRAILINGSPACE(mb) == 0) {
717 MGET(mb2, M_WAIT, MT_DATA);
718 if (siz >= MINCLSIZE)
719 MCLGET(mb2, M_WAIT);
720 mb->m_next = mb2;
721 mb = mb2;
722 mb->m_len = 0;
723 bpos = mtod(mb, caddr_t);
724 }
725 i = min(siz, M_TRAILINGSPACE(mb));
726 bcopy(auth_str, bpos, i);
727 mb->m_len += i;
728 auth_str += i;
729 bpos += i;
730 siz -= i;
731 }
732 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) {
733 for (i = 0; i < siz; i++)
734 *bpos++ = '\0';
735 mb->m_len += siz;
736 }
737 break;
738 };
739
740 /*
741 * And the verifier...
742 */
743 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
744 if (verf_str) {
745 *tl++ = txdr_unsigned(RPCAUTH_KERB4);
746 *tl = txdr_unsigned(verf_len);
747 siz = verf_len;
748 while (siz > 0) {
749 if (M_TRAILINGSPACE(mb) == 0) {
750 MGET(mb2, M_WAIT, MT_DATA);
751 if (siz >= MINCLSIZE)
752 MCLGET(mb2, M_WAIT);
753 mb->m_next = mb2;
754 mb = mb2;
755 mb->m_len = 0;
756 bpos = mtod(mb, caddr_t);
757 }
758 i = min(siz, M_TRAILINGSPACE(mb));
759 bcopy(verf_str, bpos, i);
760 mb->m_len += i;
761 verf_str += i;
762 bpos += i;
763 siz -= i;
764 }
765 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) {
766 for (i = 0; i < siz; i++)
767 *bpos++ = '\0';
768 mb->m_len += siz;
769 }
770 } else {
771 *tl++ = txdr_unsigned(RPCAUTH_NULL);
772 *tl = 0;
773 }
774 mb->m_next = mrest;
775 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
776 mreq->m_pkthdr.rcvif = (struct ifnet *)0;
777 *mbp = mb;
778 return (mreq);
779}
780
781/*
782 * copies mbuf chain to the uio scatter/gather list
783 */
784int
785nfsm_mbuftouio(mrep, uiop, siz, dpos)
786 struct mbuf **mrep;
40393ded 787 struct uio *uiop;
984263bc
MD
788 int siz;
789 caddr_t *dpos;
790{
40393ded
RG
791 char *mbufcp, *uiocp;
792 int xfer, left, len;
793 struct mbuf *mp;
984263bc
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794 long uiosiz, rem;
795 int error = 0;
796
797 mp = *mrep;
798 mbufcp = *dpos;
799 len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
800 rem = nfsm_rndup(siz)-siz;
801 while (siz > 0) {
802 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
803 return (EFBIG);
804 left = uiop->uio_iov->iov_len;
805 uiocp = uiop->uio_iov->iov_base;
806 if (left > siz)
807 left = siz;
808 uiosiz = left;
809 while (left > 0) {
810 while (len == 0) {
811 mp = mp->m_next;
812 if (mp == NULL)
813 return (EBADRPC);
814 mbufcp = mtod(mp, caddr_t);
815 len = mp->m_len;
816 }
817 xfer = (left > len) ? len : left;
818#ifdef notdef
819 /* Not Yet.. */
820 if (uiop->uio_iov->iov_op != NULL)
821 (*(uiop->uio_iov->iov_op))
822 (mbufcp, uiocp, xfer);
823 else
824#endif
825 if (uiop->uio_segflg == UIO_SYSSPACE)
826 bcopy(mbufcp, uiocp, xfer);
827 else
828 copyout(mbufcp, uiocp, xfer);
829 left -= xfer;
830 len -= xfer;
831 mbufcp += xfer;
832 uiocp += xfer;
833 uiop->uio_offset += xfer;
834 uiop->uio_resid -= xfer;
835 }
836 if (uiop->uio_iov->iov_len <= siz) {
837 uiop->uio_iovcnt--;
838 uiop->uio_iov++;
839 } else {
840 uiop->uio_iov->iov_base += uiosiz;
841 uiop->uio_iov->iov_len -= uiosiz;
842 }
843 siz -= uiosiz;
844 }
845 *dpos = mbufcp;
846 *mrep = mp;
847 if (rem > 0) {
848 if (len < rem)
849 error = nfs_adv(mrep, dpos, rem, len);
850 else
851 *dpos += rem;
852 }
853 return (error);
854}
855
856/*
857 * copies a uio scatter/gather list to an mbuf chain.
858 * NOTE: can ony handle iovcnt == 1
859 */
860int
861nfsm_uiotombuf(uiop, mq, siz, bpos)
40393ded 862 struct uio *uiop;
984263bc
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863 struct mbuf **mq;
864 int siz;
865 caddr_t *bpos;
866{
40393ded
RG
867 char *uiocp;
868 struct mbuf *mp, *mp2;
869 int xfer, left, mlen;
984263bc
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870 int uiosiz, clflg, rem;
871 char *cp;
872
873#ifdef DIAGNOSTIC
874 if (uiop->uio_iovcnt != 1)
875 panic("nfsm_uiotombuf: iovcnt != 1");
876#endif
877
878 if (siz > MLEN) /* or should it >= MCLBYTES ?? */
879 clflg = 1;
880 else
881 clflg = 0;
882 rem = nfsm_rndup(siz)-siz;
883 mp = mp2 = *mq;
884 while (siz > 0) {
885 left = uiop->uio_iov->iov_len;
886 uiocp = uiop->uio_iov->iov_base;
887 if (left > siz)
888 left = siz;
889 uiosiz = left;
890 while (left > 0) {
891 mlen = M_TRAILINGSPACE(mp);
892 if (mlen == 0) {
893 MGET(mp, M_WAIT, MT_DATA);
894 if (clflg)
895 MCLGET(mp, M_WAIT);
896 mp->m_len = 0;
897 mp2->m_next = mp;
898 mp2 = mp;
899 mlen = M_TRAILINGSPACE(mp);
900 }
901 xfer = (left > mlen) ? mlen : left;
902#ifdef notdef
903 /* Not Yet.. */
904 if (uiop->uio_iov->iov_op != NULL)
905 (*(uiop->uio_iov->iov_op))
906 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
907 else
908#endif
909 if (uiop->uio_segflg == UIO_SYSSPACE)
910 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
911 else
912 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
913 mp->m_len += xfer;
914 left -= xfer;
915 uiocp += xfer;
916 uiop->uio_offset += xfer;
917 uiop->uio_resid -= xfer;
918 }
919 uiop->uio_iov->iov_base += uiosiz;
920 uiop->uio_iov->iov_len -= uiosiz;
921 siz -= uiosiz;
922 }
923 if (rem > 0) {
924 if (rem > M_TRAILINGSPACE(mp)) {
925 MGET(mp, M_WAIT, MT_DATA);
926 mp->m_len = 0;
927 mp2->m_next = mp;
928 }
929 cp = mtod(mp, caddr_t)+mp->m_len;
930 for (left = 0; left < rem; left++)
931 *cp++ = '\0';
932 mp->m_len += rem;
933 *bpos = cp;
934 } else
935 *bpos = mtod(mp, caddr_t)+mp->m_len;
936 *mq = mp;
937 return (0);
938}
939
940/*
941 * Help break down an mbuf chain by setting the first siz bytes contiguous
942 * pointed to by returned val.
943 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough
944 * cases. (The macros use the vars. dpos and dpos2)
945 */
946int
947nfsm_disct(mdp, dposp, siz, left, cp2)
948 struct mbuf **mdp;
949 caddr_t *dposp;
950 int siz;
951 int left;
952 caddr_t *cp2;
953{
40393ded
RG
954 struct mbuf *mp, *mp2;
955 int siz2, xfer;
956 caddr_t p;
984263bc
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957
958 mp = *mdp;
959 while (left == 0) {
960 *mdp = mp = mp->m_next;
961 if (mp == NULL)
962 return (EBADRPC);
963 left = mp->m_len;
964 *dposp = mtod(mp, caddr_t);
965 }
966 if (left >= siz) {
967 *cp2 = *dposp;
968 *dposp += siz;
969 } else if (mp->m_next == NULL) {
970 return (EBADRPC);
971 } else if (siz > MHLEN) {
972 panic("nfs S too big");
973 } else {
974 MGET(mp2, M_WAIT, MT_DATA);
975 mp2->m_next = mp->m_next;
976 mp->m_next = mp2;
977 mp->m_len -= left;
978 mp = mp2;
979 *cp2 = p = mtod(mp, caddr_t);
980 bcopy(*dposp, p, left); /* Copy what was left */
981 siz2 = siz-left;
982 p += left;
983 mp2 = mp->m_next;
984 /* Loop around copying up the siz2 bytes */
985 while (siz2 > 0) {
986 if (mp2 == NULL)
987 return (EBADRPC);
988 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2;
989 if (xfer > 0) {
990 bcopy(mtod(mp2, caddr_t), p, xfer);
991 NFSMADV(mp2, xfer);
992 mp2->m_len -= xfer;
993 p += xfer;
994 siz2 -= xfer;
995 }
996 if (siz2 > 0)
997 mp2 = mp2->m_next;
998 }
999 mp->m_len = siz;
1000 *mdp = mp2;
1001 *dposp = mtod(mp2, caddr_t);
1002 }
1003 return (0);
1004}
1005
1006/*
1007 * Advance the position in the mbuf chain.
1008 */
1009int
1010nfs_adv(mdp, dposp, offs, left)
1011 struct mbuf **mdp;
1012 caddr_t *dposp;
1013 int offs;
1014 int left;
1015{
40393ded
RG
1016 struct mbuf *m;
1017 int s;
984263bc
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1018
1019 m = *mdp;
1020 s = left;
1021 while (s < offs) {
1022 offs -= s;
1023 m = m->m_next;
1024 if (m == NULL)
1025 return (EBADRPC);
1026 s = m->m_len;
1027 }
1028 *mdp = m;
1029 *dposp = mtod(m, caddr_t)+offs;
1030 return (0);
1031}
1032
1033/*
1034 * Copy a string into mbufs for the hard cases...
1035 */
1036int
1037nfsm_strtmbuf(mb, bpos, cp, siz)
1038 struct mbuf **mb;
1039 char **bpos;
1040 const char *cp;
1041 long siz;
1042{
40393ded 1043 struct mbuf *m1 = NULL, *m2;
984263bc
MD
1044 long left, xfer, len, tlen;
1045 u_int32_t *tl;
1046 int putsize;
1047
1048 putsize = 1;
1049 m2 = *mb;
1050 left = M_TRAILINGSPACE(m2);
1051 if (left > 0) {
1052 tl = ((u_int32_t *)(*bpos));
1053 *tl++ = txdr_unsigned(siz);
1054 putsize = 0;
1055 left -= NFSX_UNSIGNED;
1056 m2->m_len += NFSX_UNSIGNED;
1057 if (left > 0) {
1058 bcopy(cp, (caddr_t) tl, left);
1059 siz -= left;
1060 cp += left;
1061 m2->m_len += left;
1062 left = 0;
1063 }
1064 }
1065 /* Loop around adding mbufs */
1066 while (siz > 0) {
1067 MGET(m1, M_WAIT, MT_DATA);
1068 if (siz > MLEN)
1069 MCLGET(m1, M_WAIT);
1070 m1->m_len = NFSMSIZ(m1);
1071 m2->m_next = m1;
1072 m2 = m1;
1073 tl = mtod(m1, u_int32_t *);
1074 tlen = 0;
1075 if (putsize) {
1076 *tl++ = txdr_unsigned(siz);
1077 m1->m_len -= NFSX_UNSIGNED;
1078 tlen = NFSX_UNSIGNED;
1079 putsize = 0;
1080 }
1081 if (siz < m1->m_len) {
1082 len = nfsm_rndup(siz);
1083 xfer = siz;
1084 if (xfer < len)
1085 *(tl+(xfer>>2)) = 0;
1086 } else {
1087 xfer = len = m1->m_len;
1088 }
1089 bcopy(cp, (caddr_t) tl, xfer);
1090 m1->m_len = len+tlen;
1091 siz -= xfer;
1092 cp += xfer;
1093 }
1094 *mb = m1;
1095 *bpos = mtod(m1, caddr_t)+m1->m_len;
1096 return (0);
1097}
1098
1099/*
1100 * Called once to initialize data structures...
1101 */
1102int
1103nfs_init(vfsp)
1104 struct vfsconf *vfsp;
1105{
40393ded 1106 int i;
984263bc
MD
1107
1108 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1);
1109
1110 nfs_mount_type = vfsp->vfc_typenum;
1111 nfsrtt.pos = 0;
1112 rpc_vers = txdr_unsigned(RPC_VER2);
1113 rpc_call = txdr_unsigned(RPC_CALL);
1114 rpc_reply = txdr_unsigned(RPC_REPLY);
1115 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
1116 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
1117 rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
1118 rpc_autherr = txdr_unsigned(RPC_AUTHERR);
1119 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
1120 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4);
1121 nfs_prog = txdr_unsigned(NFS_PROG);
1122 nqnfs_prog = txdr_unsigned(NQNFS_PROG);
1123 nfs_true = txdr_unsigned(TRUE);
1124 nfs_false = txdr_unsigned(FALSE);
1125 nfs_xdrneg1 = txdr_unsigned(-1);
1126 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
1127 if (nfs_ticks < 1)
1128 nfs_ticks = 1;
1129 /* Ensure async daemons disabled */
1130 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
dadab5e9 1131 nfs_iodwant[i] = NULL;
984263bc
MD
1132 nfs_iodmount[i] = (struct nfsmount *)0;
1133 }
1134 nfs_nhinit(); /* Init the nfsnode table */
1135#ifndef NFS_NOSERVER
1136 nfsrv_init(0); /* Init server data structures */
1137 nfsrv_initcache(); /* Init the server request cache */
1138#endif
1139
1140 /*
1141 * Initialize the nqnfs server stuff.
1142 */
1143 if (nqnfsstarttime == 0) {
1144 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease
1145 + nqsrv_clockskew + nqsrv_writeslack;
1146 NQLOADNOVRAM(nqnfsstarttime);
1147 CIRCLEQ_INIT(&nqtimerhead);
1148 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash);
1149 }
1150
1151 /*
1152 * Initialize reply list and start timer
1153 */
1154 TAILQ_INIT(&nfs_reqq);
1155
1156 nfs_timer(0);
1157
1158 /*
1159 * Set up lease_check and lease_updatetime so that other parts
1160 * of the system can call us, if we are loadable.
1161 */
1162#ifndef NFS_NOSERVER
1163 nfs_prev_vop_lease_check = default_vnodeop_p[VOFFSET(vop_lease)];
1164 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check;
1165#endif
1166 nfs_prev_lease_updatetime = lease_updatetime;
1167 lease_updatetime = nfs_lease_updatetime;
1168 nfs_prev_nfssvc_sy_narg = sysent[SYS_nfssvc].sy_narg;
1169 sysent[SYS_nfssvc].sy_narg = 2;
1170 nfs_prev_nfssvc_sy_call = sysent[SYS_nfssvc].sy_call;
1171 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc;
1172
1173 nfs_pbuf_freecnt = nswbuf / 2 + 1;
1174
1175 return (0);
1176}
1177
1178int
1179nfs_uninit(vfsp)
1180 struct vfsconf *vfsp;
1181{
1182
1183 untimeout(nfs_timer, (void *)NULL, nfs_timer_handle);
1184 nfs_mount_type = -1;
1185#ifndef NFS_NOSERVER
1186 default_vnodeop_p[VOFFSET(vop_lease)] = nfs_prev_vop_lease_check;
1187#endif
1188 lease_updatetime = nfs_prev_lease_updatetime;
1189 sysent[SYS_nfssvc].sy_narg = nfs_prev_nfssvc_sy_narg;
1190 sysent[SYS_nfssvc].sy_call = nfs_prev_nfssvc_sy_call;
1191 return (0);
1192}
1193
1194/*
1195 * Attribute cache routines.
1196 * nfs_loadattrcache() - loads or updates the cache contents from attributes
1197 * that are on the mbuf list
1198 * nfs_getattrcache() - returns valid attributes if found in cache, returns
1199 * error otherwise
1200 */
1201
1202/*
1203 * Load the attribute cache (that lives in the nfsnode entry) with
1204 * the values on the mbuf list and
1205 * Iff vap not NULL
1206 * copy the attributes to *vaper
1207 */
1208int
1209nfs_loadattrcache(vpp, mdp, dposp, vaper, dontshrink)
1210 struct vnode **vpp;
1211 struct mbuf **mdp;
1212 caddr_t *dposp;
1213 struct vattr *vaper;
1214 int dontshrink;
1215{
40393ded
RG
1216 struct vnode *vp = *vpp;
1217 struct vattr *vap;
1218 struct nfs_fattr *fp;
1219 struct nfsnode *np;
1220 int32_t t1;
984263bc
MD
1221 caddr_t cp2;
1222 int error = 0, rdev;
1223 struct mbuf *md;
1224 enum vtype vtyp;
1225 u_short vmode;
1226 struct timespec mtime;
1227 int v3 = NFS_ISV3(vp);
1228
1229 md = *mdp;
1230 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
1231 if ((error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2)) != 0)
1232 return (error);
1233 fp = (struct nfs_fattr *)cp2;
1234 if (v3) {
1235 vtyp = nfsv3tov_type(fp->fa_type);
1236 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1237 rdev = makeudev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
1238 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
1239 fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
1240 } else {
1241 vtyp = nfsv2tov_type(fp->fa_type);
1242 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1243 /*
1244 * XXX
1245 *
1246 * The duplicate information returned in fa_type and fa_mode
1247 * is an ambiguity in the NFS version 2 protocol.
1248 *
1249 * VREG should be taken literally as a regular file. If a
1250 * server intents to return some type information differently
1251 * in the upper bits of the mode field (e.g. for sockets, or
1252 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
1253 * leave the examination of the mode bits even in the VREG
1254 * case to avoid breakage for bogus servers, but we make sure
1255 * that there are actually type bits set in the upper part of
1256 * fa_mode (and failing that, trust the va_type field).
1257 *
1258 * NFSv3 cleared the issue, and requires fa_mode to not
1259 * contain any type information (while also introduing sockets
1260 * and FIFOs for fa_type).
1261 */
1262 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
1263 vtyp = IFTOVT(vmode);
1264 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
1265 fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
1266
1267 /*
1268 * Really ugly NFSv2 kludge.
1269 */
1270 if (vtyp == VCHR && rdev == 0xffffffff)
1271 vtyp = VFIFO;
1272 }
1273
1274 /*
1275 * If v_type == VNON it is a new node, so fill in the v_type,
1276 * n_mtime fields. Check to see if it represents a special
1277 * device, and if so, check for a possible alias. Once the
1278 * correct vnode has been obtained, fill in the rest of the
1279 * information.
1280 */
1281 np = VTONFS(vp);
1282 if (vp->v_type != vtyp) {
1283 vp->v_type = vtyp;
1284 if (vp->v_type == VFIFO) {
1285 vp->v_op = fifo_nfsv2nodeop_p;
1286 }
1287 if (vp->v_type == VCHR || vp->v_type == VBLK) {
1288 vp->v_op = spec_nfsv2nodeop_p;
1289 addaliasu(vp, rdev);
1290 }
1291 np->n_mtime = mtime.tv_sec;
1292 }
1293 vap = &np->n_vattr;
1294 vap->va_type = vtyp;
1295 vap->va_mode = (vmode & 07777);
1296 vap->va_rdev = rdev;
1297 vap->va_mtime = mtime;
1298 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
1299 if (v3) {
1300 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1301 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1302 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1303 vap->va_size = fxdr_hyper(&fp->fa3_size);
1304 vap->va_blocksize = NFS_FABLKSIZE;
1305 vap->va_bytes = fxdr_hyper(&fp->fa3_used);
1306 vap->va_fileid = fxdr_unsigned(int32_t,
1307 fp->fa3_fileid.nfsuquad[1]);
1308 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
1309 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
1310 vap->va_flags = 0;
1311 vap->va_filerev = 0;
1312 } else {
1313 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1314 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1315 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1316 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
1317 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
1318 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks)
1319 * NFS_FABLKSIZE;
1320 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
1321 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
1322 vap->va_flags = 0;
1323 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
1324 fp->fa2_ctime.nfsv2_sec);
1325 vap->va_ctime.tv_nsec = 0;
1326 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
1327 vap->va_filerev = 0;
1328 }
1329 np->n_attrstamp = time_second;
1330 if (vap->va_size != np->n_size) {
1331 if (vap->va_type == VREG) {
1332 if (dontshrink && vap->va_size < np->n_size) {
1333 /*
1334 * We've been told not to shrink the file;
1335 * zero np->n_attrstamp to indicate that
1336 * the attributes are stale.
1337 */
1338 vap->va_size = np->n_size;
1339 np->n_attrstamp = 0;
1340 } else if (np->n_flag & NMODIFIED) {
1341 if (vap->va_size < np->n_size)
1342 vap->va_size = np->n_size;
1343 else
1344 np->n_size = vap->va_size;
1345 } else {
1346 np->n_size = vap->va_size;
1347 }
1348 vnode_pager_setsize(vp, np->n_size);
1349 } else {
1350 np->n_size = vap->va_size;
1351 }
1352 }
1353 if (vaper != NULL) {
1354 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
1355 if (np->n_flag & NCHG) {
1356 if (np->n_flag & NACC)
1357 vaper->va_atime = np->n_atim;
1358 if (np->n_flag & NUPD)
1359 vaper->va_mtime = np->n_mtim;
1360 }
1361 }
1362 return (0);
1363}
1364
1365#ifdef NFS_ACDEBUG
1366#include <sys/sysctl.h>
1367SYSCTL_DECL(_vfs_nfs);
1368static int nfs_acdebug;
1369SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
1370#endif
1371
1372/*
1373 * Check the time stamp
1374 * If the cache is valid, copy contents to *vap and return 0
1375 * otherwise return an error
1376 */
1377int
1378nfs_getattrcache(vp, vaper)
40393ded 1379 struct vnode *vp;
984263bc
MD
1380 struct vattr *vaper;
1381{
40393ded
RG
1382 struct nfsnode *np;
1383 struct vattr *vap;
984263bc
MD
1384 struct nfsmount *nmp;
1385 int timeo;
1386
1387 np = VTONFS(vp);
1388 vap = &np->n_vattr;
1389 nmp = VFSTONFS(vp->v_mount);
1390 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
1391 timeo = (time_second - np->n_mtime) / 10;
1392
1393#ifdef NFS_ACDEBUG
1394 if (nfs_acdebug>1)
1395 printf("nfs_getattrcache: initial timeo = %d\n", timeo);
1396#endif
1397
1398 if (vap->va_type == VDIR) {
1399 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
1400 timeo = nmp->nm_acdirmin;
1401 else if (timeo > nmp->nm_acdirmax)
1402 timeo = nmp->nm_acdirmax;
1403 } else {
1404 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
1405 timeo = nmp->nm_acregmin;
1406 else if (timeo > nmp->nm_acregmax)
1407 timeo = nmp->nm_acregmax;
1408 }
1409
1410#ifdef NFS_ACDEBUG
1411 if (nfs_acdebug > 2)
1412 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
1413 nmp->nm_acregmin, nmp->nm_acregmax,
1414 nmp->nm_acdirmin, nmp->nm_acdirmax);
1415
1416 if (nfs_acdebug)
1417 printf("nfs_getattrcache: age = %d; final timeo = %d\n",
1418 (time_second - np->n_attrstamp), timeo);
1419#endif
1420
1421 if ((time_second - np->n_attrstamp) >= timeo) {
1422 nfsstats.attrcache_misses++;
1423 return (ENOENT);
1424 }
1425 nfsstats.attrcache_hits++;
1426 if (vap->va_size != np->n_size) {
1427 if (vap->va_type == VREG) {
1428 if (np->n_flag & NMODIFIED) {
1429 if (vap->va_size < np->n_size)
1430 vap->va_size = np->n_size;
1431 else
1432 np->n_size = vap->va_size;
1433 } else {
1434 np->n_size = vap->va_size;
1435 }
1436 vnode_pager_setsize(vp, np->n_size);
1437 } else {
1438 np->n_size = vap->va_size;
1439 }
1440 }
1441 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
1442 if (np->n_flag & NCHG) {
1443 if (np->n_flag & NACC)
1444 vaper->va_atime = np->n_atim;
1445 if (np->n_flag & NUPD)
1446 vaper->va_mtime = np->n_mtim;
1447 }
1448 return (0);
1449}
1450
1451#ifndef NFS_NOSERVER
1452/*
1453 * Set up nameidata for a lookup() call and do it.
1454 *
1455 * If pubflag is set, this call is done for a lookup operation on the
1456 * public filehandle. In that case we allow crossing mountpoints and
1457 * absolute pathnames. However, the caller is expected to check that
1458 * the lookup result is within the public fs, and deny access if
1459 * it is not.
1460 *
1461 * nfs_namei() clears out garbage fields that namei() might leave garbage.
1462 * This is mainly ni_vp and ni_dvp when an error occurs, and ni_dvp when no
1463 * error occurs but the parent was not requested.
1464 *
1465 * dirp may be set whether an error is returned or not, and must be
1466 * released by the caller.
1467 */
1468int
dadab5e9 1469nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, td, kerbflag, pubflag)
40393ded 1470 struct nameidata *ndp;
984263bc
MD
1471 fhandle_t *fhp;
1472 int len;
1473 struct nfssvc_sock *slp;
1474 struct sockaddr *nam;
1475 struct mbuf **mdp;
1476 caddr_t *dposp;
1477 struct vnode **retdirp;
dadab5e9 1478 struct thread *td;
984263bc
MD
1479 int kerbflag, pubflag;
1480{
40393ded
RG
1481 int i, rem;
1482 struct mbuf *md;
1483 char *fromcp, *tocp, *cp;
984263bc
MD
1484 struct iovec aiov;
1485 struct uio auio;
1486 struct vnode *dp;
1487 int error, rdonly, linklen;
1488 struct componentname *cnp = &ndp->ni_cnd;
1489
1490 *retdirp = (struct vnode *)0;
1491 cnp->cn_pnbuf = zalloc(namei_zone);
1492
1493 /*
1494 * Copy the name from the mbuf list to ndp->ni_pnbuf
1495 * and set the various ndp fields appropriately.
1496 */
1497 fromcp = *dposp;
1498 tocp = cnp->cn_pnbuf;
1499 md = *mdp;
1500 rem = mtod(md, caddr_t) + md->m_len - fromcp;
1501 for (i = 0; i < len; i++) {
1502 while (rem == 0) {
1503 md = md->m_next;
1504 if (md == NULL) {
1505 error = EBADRPC;
1506 goto out;
1507 }
1508 fromcp = mtod(md, caddr_t);
1509 rem = md->m_len;
1510 }
1511 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) {
1512 error = EACCES;
1513 goto out;
1514 }
1515 *tocp++ = *fromcp++;
1516 rem--;
1517 }
1518 *tocp = '\0';
1519 *mdp = md;
1520 *dposp = fromcp;
1521 len = nfsm_rndup(len)-len;
1522 if (len > 0) {
1523 if (rem >= len)
1524 *dposp += len;
1525 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0)
1526 goto out;
1527 }
1528
1529 /*
1530 * Extract and set starting directory.
1531 */
1532 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp,
1533 nam, &rdonly, kerbflag, pubflag);
1534 if (error)
1535 goto out;
1536 if (dp->v_type != VDIR) {
1537 vrele(dp);
1538 error = ENOTDIR;
1539 goto out;
1540 }
1541
1542 if (rdonly)
2b69e610 1543 cnp->cn_flags |= CNP_RDONLY;
984263bc
MD
1544
1545 /*
1546 * Set return directory. Reference to dp is implicitly transfered
1547 * to the returned pointer
1548 */
1549 *retdirp = dp;
1550
1551 if (pubflag) {
1552 /*
1553 * Oh joy. For WebNFS, handle those pesky '%' escapes,
1554 * and the 'native path' indicator.
1555 */
1556 cp = zalloc(namei_zone);
1557 fromcp = cnp->cn_pnbuf;
1558 tocp = cp;
1559 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) {
1560 switch ((unsigned char)*fromcp) {
1561 case WEBNFS_NATIVE_CHAR:
1562 /*
1563 * 'Native' path for us is the same
1564 * as a path according to the NFS spec,
1565 * just skip the escape char.
1566 */
1567 fromcp++;
1568 break;
1569 /*
1570 * More may be added in the future, range 0x80-0xff
1571 */
1572 default:
1573 error = EIO;
1574 zfree(namei_zone, cp);
1575 goto out;
1576 }
1577 }
1578 /*
1579 * Translate the '%' escapes, URL-style.
1580 */
1581 while (*fromcp != '\0') {
1582 if (*fromcp == WEBNFS_ESC_CHAR) {
1583 if (fromcp[1] != '\0' && fromcp[2] != '\0') {
1584 fromcp++;
1585 *tocp++ = HEXSTRTOI(fromcp);
1586 fromcp += 2;
1587 continue;
1588 } else {
1589 error = ENOENT;
1590 zfree(namei_zone, cp);
1591 goto out;
1592 }
1593 } else
1594 *tocp++ = *fromcp++;
1595 }
1596 *tocp = '\0';
1597 zfree(namei_zone, cnp->cn_pnbuf);
1598 cnp->cn_pnbuf = cp;
1599 }
1600
1601 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1;
1602 ndp->ni_segflg = UIO_SYSSPACE;
1603
1604 if (pubflag) {
1605 ndp->ni_rootdir = rootvnode;
1606 ndp->ni_loopcnt = 0;
1607 if (cnp->cn_pnbuf[0] == '/')
1608 dp = rootvnode;
1609 } else {
2b69e610 1610 cnp->cn_flags |= CNP_NOCROSSMOUNT;
984263bc
MD
1611 }
1612
1613 /*
1614 * Initialize for scan, set ni_startdir and bump ref on dp again
1615 * becuase lookup() will dereference ni_startdir.
1616 */
1617
dadab5e9 1618 cnp->cn_td = td;
984263bc
MD
1619 VREF(dp);
1620 ndp->ni_startdir = dp;
1621
1622 for (;;) {
1623 cnp->cn_nameptr = cnp->cn_pnbuf;
1624 /*
1625 * Call lookup() to do the real work. If an error occurs,
1626 * ndp->ni_vp and ni_dvp are left uninitialized or NULL and
1627 * we do not have to dereference anything before returning.
1628 * In either case ni_startdir will be dereferenced and NULLed
1629 * out.
1630 */
1631 error = lookup(ndp);
1632 if (error)
1633 break;
1634
1635 /*
1636 * Check for encountering a symbolic link. Trivial
1637 * termination occurs if no symlink encountered.
1638 * Note: zfree is safe because error is 0, so we will
1639 * not zfree it again when we break.
1640 */
2b69e610 1641 if ((cnp->cn_flags & CNP_ISSYMLINK) == 0) {
984263bc 1642 nfsrv_object_create(ndp->ni_vp);
2b69e610
MD
1643 if (cnp->cn_flags & (CNP_SAVENAME | CNP_SAVESTART))
1644 cnp->cn_flags |= CNP_HASBUF;
984263bc
MD
1645 else
1646 zfree(namei_zone, cnp->cn_pnbuf);
1647 break;
1648 }
1649
1650 /*
1651 * Validate symlink
1652 */
2b69e610 1653 if ((cnp->cn_flags & CNP_LOCKPARENT) && ndp->ni_pathlen == 1)
dadab5e9 1654 VOP_UNLOCK(ndp->ni_dvp, 0, td);
984263bc
MD
1655 if (!pubflag) {
1656 error = EINVAL;
1657 goto badlink2;
1658 }
1659
1660 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
1661 error = ELOOP;
1662 goto badlink2;
1663 }
1664 if (ndp->ni_pathlen > 1)
1665 cp = zalloc(namei_zone);
1666 else
1667 cp = cnp->cn_pnbuf;
1668 aiov.iov_base = cp;
1669 aiov.iov_len = MAXPATHLEN;
1670 auio.uio_iov = &aiov;
1671 auio.uio_iovcnt = 1;
1672 auio.uio_offset = 0;
1673 auio.uio_rw = UIO_READ;
1674 auio.uio_segflg = UIO_SYSSPACE;
dadab5e9 1675 auio.uio_td = NULL;
984263bc
MD
1676 auio.uio_resid = MAXPATHLEN;
1677 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
1678 if (error) {
1679 badlink1:
1680 if (ndp->ni_pathlen > 1)
1681 zfree(namei_zone, cp);
1682 badlink2:
1683 vrele(ndp->ni_dvp);
1684 vput(ndp->ni_vp);
1685 break;
1686 }
1687 linklen = MAXPATHLEN - auio.uio_resid;
1688 if (linklen == 0) {
1689 error = ENOENT;
1690 goto badlink1;
1691 }
1692 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
1693 error = ENAMETOOLONG;
1694 goto badlink1;
1695 }
1696
1697 /*
1698 * Adjust or replace path
1699 */
1700 if (ndp->ni_pathlen > 1) {
1701 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
1702 zfree(namei_zone, cnp->cn_pnbuf);
1703 cnp->cn_pnbuf = cp;
1704 } else
1705 cnp->cn_pnbuf[linklen] = '\0';
1706 ndp->ni_pathlen += linklen;
1707
1708 /*
1709 * Cleanup refs for next loop and check if root directory
1710 * should replace current directory. Normally ni_dvp
1711 * becomes the new base directory and is cleaned up when
1712 * we loop. Explicitly null pointers after invalidation
1713 * to clarify operation.
1714 */
1715 vput(ndp->ni_vp);
1716 ndp->ni_vp = NULL;
1717
1718 if (cnp->cn_pnbuf[0] == '/') {
1719 vrele(ndp->ni_dvp);
1720 ndp->ni_dvp = ndp->ni_rootdir;
1721 VREF(ndp->ni_dvp);
1722 }
1723 ndp->ni_startdir = ndp->ni_dvp;
1724 ndp->ni_dvp = NULL;
1725 }
1726
1727 /*
1728 * nfs_namei() guarentees that fields will not contain garbage
1729 * whether an error occurs or not. This allows the caller to track
1730 * cleanup state trivially.
1731 */
1732out:
1733 if (error) {
1734 zfree(namei_zone, cnp->cn_pnbuf);
1735 ndp->ni_vp = NULL;
1736 ndp->ni_dvp = NULL;
1737 ndp->ni_startdir = NULL;
2b69e610
MD
1738 cnp->cn_flags &= ~CNP_HASBUF;
1739 } else if ((ndp->ni_cnd.cn_flags & (CNP_WANTPARENT|CNP_LOCKPARENT)) == 0) {
984263bc
MD
1740 ndp->ni_dvp = NULL;
1741 }
1742 return (error);
1743}
1744
1745/*
1746 * A fiddled version of m_adj() that ensures null fill to a long
1747 * boundary and only trims off the back end
1748 */
1749void
1750nfsm_adj(mp, len, nul)
1751 struct mbuf *mp;
40393ded 1752 int len;
984263bc
MD
1753 int nul;
1754{
40393ded
RG
1755 struct mbuf *m;
1756 int count, i;
1757 char *cp;
984263bc
MD
1758
1759 /*
1760 * Trim from tail. Scan the mbuf chain,
1761 * calculating its length and finding the last mbuf.
1762 * If the adjustment only affects this mbuf, then just
1763 * adjust and return. Otherwise, rescan and truncate
1764 * after the remaining size.
1765 */
1766 count = 0;
1767 m = mp;
1768 for (;;) {
1769 count += m->m_len;
1770 if (m->m_next == (struct mbuf *)0)
1771 break;
1772 m = m->m_next;
1773 }
1774 if (m->m_len > len) {
1775 m->m_len -= len;
1776 if (nul > 0) {
1777 cp = mtod(m, caddr_t)+m->m_len-nul;
1778 for (i = 0; i < nul; i++)
1779 *cp++ = '\0';
1780 }
1781 return;
1782 }
1783 count -= len;
1784 if (count < 0)
1785 count = 0;
1786 /*
1787 * Correct length for chain is "count".
1788 * Find the mbuf with last data, adjust its length,
1789 * and toss data from remaining mbufs on chain.
1790 */
1791 for (m = mp; m; m = m->m_next) {
1792 if (m->m_len >= count) {
1793 m->m_len = count;
1794 if (nul > 0) {
1795 cp = mtod(m, caddr_t)+m->m_len-nul;
1796 for (i = 0; i < nul; i++)
1797 *cp++ = '\0';
1798 }
1799 break;
1800 }
1801 count -= m->m_len;
1802 }
1803 for (m = m->m_next;m;m = m->m_next)
1804 m->m_len = 0;
1805}
1806
1807/*
1808 * Make these functions instead of macros, so that the kernel text size
1809 * doesn't get too big...
1810 */
1811void
1812nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp)
1813 struct nfsrv_descript *nfsd;
1814 int before_ret;
40393ded 1815 struct vattr *before_vap;
984263bc
MD
1816 int after_ret;
1817 struct vattr *after_vap;
1818 struct mbuf **mbp;
1819 char **bposp;
1820{
40393ded
RG
1821 struct mbuf *mb = *mbp, *mb2;
1822 char *bpos = *bposp;
1823 u_int32_t *tl;
984263bc
MD
1824
1825 if (before_ret) {
1826 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1827 *tl = nfs_false;
1828 } else {
1829 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
1830 *tl++ = nfs_true;
1831 txdr_hyper(before_vap->va_size, tl);
1832 tl += 2;
1833 txdr_nfsv3time(&(before_vap->va_mtime), tl);
1834 tl += 2;
1835 txdr_nfsv3time(&(before_vap->va_ctime), tl);
1836 }
1837 *bposp = bpos;
1838 *mbp = mb;
1839 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
1840}
1841
1842void
1843nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp)
1844 struct nfsrv_descript *nfsd;
1845 int after_ret;
1846 struct vattr *after_vap;
1847 struct mbuf **mbp;
1848 char **bposp;
1849{
40393ded
RG
1850 struct mbuf *mb = *mbp, *mb2;
1851 char *bpos = *bposp;
1852 u_int32_t *tl;
1853 struct nfs_fattr *fp;
984263bc
MD
1854
1855 if (after_ret) {
1856 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1857 *tl = nfs_false;
1858 } else {
1859 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR);
1860 *tl++ = nfs_true;
1861 fp = (struct nfs_fattr *)tl;
1862 nfsm_srvfattr(nfsd, after_vap, fp);
1863 }
1864 *mbp = mb;
1865 *bposp = bpos;
1866}
1867
1868void
1869nfsm_srvfattr(nfsd, vap, fp)
40393ded
RG
1870 struct nfsrv_descript *nfsd;
1871 struct vattr *vap;
1872 struct nfs_fattr *fp;
984263bc
MD
1873{
1874
1875 fp->fa_nlink = txdr_unsigned(vap->va_nlink);
1876 fp->fa_uid = txdr_unsigned(vap->va_uid);
1877 fp->fa_gid = txdr_unsigned(vap->va_gid);
1878 if (nfsd->nd_flag & ND_NFSV3) {
1879 fp->fa_type = vtonfsv3_type(vap->va_type);
1880 fp->fa_mode = vtonfsv3_mode(vap->va_mode);
1881 txdr_hyper(vap->va_size, &fp->fa3_size);
1882 txdr_hyper(vap->va_bytes, &fp->fa3_used);
1883 fp->fa3_rdev.specdata1 = txdr_unsigned(umajor(vap->va_rdev));
1884 fp->fa3_rdev.specdata2 = txdr_unsigned(uminor(vap->va_rdev));
1885 fp->fa3_fsid.nfsuquad[0] = 0;
1886 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
1887 fp->fa3_fileid.nfsuquad[0] = 0;
1888 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
1889 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
1890 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
1891 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
1892 } else {
1893 fp->fa_type = vtonfsv2_type(vap->va_type);
1894 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1895 fp->fa2_size = txdr_unsigned(vap->va_size);
1896 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
1897 if (vap->va_type == VFIFO)
1898 fp->fa2_rdev = 0xffffffff;
1899 else
1900 fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
1901 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
1902 fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
1903 fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
1904 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
1905 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
1906 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
1907 }
1908}
1909
1910/*
1911 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
1912 * - look up fsid in mount list (if not found ret error)
1913 * - get vp and export rights by calling VFS_FHTOVP()
1914 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
1915 * - if not lockflag unlock it with VOP_UNLOCK()
1916 */
1917int
1918nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag)
1919 fhandle_t *fhp;
1920 int lockflag;
1921 struct vnode **vpp;
1922 struct ucred *cred;
1923 struct nfssvc_sock *slp;
1924 struct sockaddr *nam;
1925 int *rdonlyp;
1926 int kerbflag;
1927 int pubflag;
1928{
dadab5e9 1929 struct thread *td = curthread; /* XXX */
40393ded
RG
1930 struct mount *mp;
1931 int i;
984263bc
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1932 struct ucred *credanon;
1933 int error, exflags;
1934#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */
1935 struct sockaddr_int *saddr;
1936#endif
1937
1938 *vpp = (struct vnode *)0;
1939
1940 if (nfs_ispublicfh(fhp)) {
1941 if (!pubflag || !nfs_pub.np_valid)
1942 return (ESTALE);
1943 fhp = &nfs_pub.np_handle;
1944 }
1945
1946 mp = vfs_getvfs(&fhp->fh_fsid);
1947 if (!mp)
1948 return (ESTALE);
1949 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon);
1950 if (error)
1951 return (error);
1952 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp);
1953 if (error)
1954 return (error);
1955#ifdef MNT_EXNORESPORT
1956 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) {
1957 saddr = (struct sockaddr_in *)nam;
1958 if (saddr->sin_family == AF_INET &&
1959 ntohs(saddr->sin_port) >= IPPORT_RESERVED) {
1960 vput(*vpp);
1961 *vpp = NULL;
1962 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1963 }
1964 }
1965#endif
1966 /*
1967 * Check/setup credentials.
1968 */
1969 if (exflags & MNT_EXKERB) {
1970 if (!kerbflag) {
1971 vput(*vpp);
1972 *vpp = NULL;
1973 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1974 }
1975 } else if (kerbflag) {
1976 vput(*vpp);
1977 *vpp = NULL;
1978 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1979 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
1980 cred->cr_uid = credanon->cr_uid;
1981 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++)
1982 cred->cr_groups[i] = credanon->cr_groups[i];
1983 cred->cr_ngroups = i;
1984 }
1985 if (exflags & MNT_EXRDONLY)
1986 *rdonlyp = 1;
1987 else
1988 *rdonlyp = 0;
1989
1990 nfsrv_object_create(*vpp);
1991
1992 if (!lockflag)
dadab5e9 1993 VOP_UNLOCK(*vpp, 0, td);
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1994 return (0);
1995}
1996
1997
1998/*
1999 * WebNFS: check if a filehandle is a public filehandle. For v3, this
2000 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has
2001 * transformed this to all zeroes in both cases, so check for it.
2002 */
2003int
2004nfs_ispublicfh(fhp)
2005 fhandle_t *fhp;
2006{
2007 char *cp = (char *)fhp;
2008 int i;
2009
2010 for (i = 0; i < NFSX_V3FH; i++)
2011 if (*cp++ != 0)
2012 return (FALSE);
2013 return (TRUE);
2014}
2015
2016#endif /* NFS_NOSERVER */
2017/*
2018 * This function compares two net addresses by family and returns TRUE
2019 * if they are the same host.
2020 * If there is any doubt, return FALSE.
2021 * The AF_INET family is handled as a special case so that address mbufs
2022 * don't need to be saved to store "struct in_addr", which is only 4 bytes.
2023 */
2024int
2025netaddr_match(family, haddr, nam)
2026 int family;
2027 union nethostaddr *haddr;
2028 struct sockaddr *nam;
2029{
40393ded 2030 struct sockaddr_in *inetaddr;
984263bc
MD
2031
2032 switch (family) {
2033 case AF_INET:
2034 inetaddr = (struct sockaddr_in *)nam;
2035 if (inetaddr->sin_family == AF_INET &&
2036 inetaddr->sin_addr.s_addr == haddr->had_inetaddr)
2037 return (1);
2038 break;
2039 default:
2040 break;
2041 };
2042 return (0);
2043}
2044
2045static nfsuint64 nfs_nullcookie = { { 0, 0 } };
2046/*
2047 * This function finds the directory cookie that corresponds to the
2048 * logical byte offset given.
2049 */
2050nfsuint64 *
2051nfs_getcookie(np, off, add)
40393ded 2052 struct nfsnode *np;
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MD
2053 off_t off;
2054 int add;
2055{
40393ded
RG
2056 struct nfsdmap *dp, *dp2;
2057 int pos;
984263bc
MD
2058
2059 pos = (uoff_t)off / NFS_DIRBLKSIZ;
2060 if (pos == 0 || off < 0) {
2061#ifdef DIAGNOSTIC
2062 if (add)
2063 panic("nfs getcookie add at <= 0");
2064#endif
2065 return (&nfs_nullcookie);
2066 }
2067 pos--;
2068 dp = np->n_cookies.lh_first;
2069 if (!dp) {
2070 if (add) {
2071 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
2072 M_NFSDIROFF, M_WAITOK);
2073 dp->ndm_eocookie = 0;
2074 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
2075 } else
2076 return ((nfsuint64 *)0);
2077 }
2078 while (pos >= NFSNUMCOOKIES) {
2079 pos -= NFSNUMCOOKIES;
2080 if (dp->ndm_list.le_next) {
2081 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
2082 pos >= dp->ndm_eocookie)
2083 return ((nfsuint64 *)0);
2084 dp = dp->ndm_list.le_next;
2085 } else if (add) {
2086 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
2087 M_NFSDIROFF, M_WAITOK);
2088 dp2->ndm_eocookie = 0;
2089 LIST_INSERT_AFTER(dp, dp2, ndm_list);
2090 dp = dp2;
2091 } else
2092 return ((nfsuint64 *)0);
2093 }
2094 if (pos >= dp->ndm_eocookie) {
2095 if (add)
2096 dp->ndm_eocookie = pos + 1;
2097 else
2098 return ((nfsuint64 *)0);
2099 }
2100 return (&dp->ndm_cookies[pos]);
2101}
2102
2103/*
2104 * Invalidate cached directory information, except for the actual directory
2105 * blocks (which are invalidated separately).
2106 * Done mainly to avoid the use of stale offset cookies.
2107 */
2108void
2109nfs_invaldir(vp)
40393ded 2110 struct vnode *vp;
984263bc 2111{
40393ded 2112 struct nfsnode *np = VTONFS(vp);
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2113
2114#ifdef DIAGNOSTIC
2115 if (vp->v_type != VDIR)
2116 panic("nfs: invaldir not dir");
2117#endif
2118 np->n_direofoffset = 0;
2119 np->n_cookieverf.nfsuquad[0] = 0;
2120 np->n_cookieverf.nfsuquad[1] = 0;
2121 if (np->n_cookies.lh_first)
2122 np->n_cookies.lh_first->ndm_eocookie = 0;
2123}
2124
2125/*
2126 * The write verifier has changed (probably due to a server reboot), so all
2127 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the
2128 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
2129 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the
2130 * mount point.
2131 *
2132 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data
2133 * writes are not clusterable.
2134 */
2135void
2136nfs_clearcommit(mp)
2137 struct mount *mp;
2138{
40393ded
RG
2139 struct vnode *vp, *nvp;
2140 struct buf *bp, *nbp;
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2141 int s;
2142
2143 s = splbio();
2144loop:
2145 for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); vp; vp = nvp) {
2146 if (vp->v_mount != mp) /* Paranoia */
2147 goto loop;
2148 nvp = TAILQ_NEXT(vp, v_nmntvnodes);
2149 for (bp = TAILQ_FIRST(&vp->v_dirtyblkhd); bp; bp = nbp) {
2150 nbp = TAILQ_NEXT(bp, b_vnbufs);
2151 if (BUF_REFCNT(bp) == 0 &&
2152 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
2153 == (B_DELWRI | B_NEEDCOMMIT))
2154 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
2155 }
2156 }
2157 splx(s);
2158}
2159
2160#ifndef NFS_NOSERVER
2161/*
2162 * Map errnos to NFS error numbers. For Version 3 also filter out error
2163 * numbers not specified for the associated procedure.
2164 */
2165int
2166nfsrv_errmap(nd, err)
2167 struct nfsrv_descript *nd;
40393ded 2168 int err;
984263bc 2169{
40393ded 2170 short *defaulterrp, *errp;
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MD
2171
2172 if (nd->nd_flag & ND_NFSV3) {
2173 if (nd->nd_procnum <= NFSPROC_COMMIT) {
2174 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
2175 while (*++errp) {
2176 if (*errp == err)
2177 return (err);
2178 else if (*errp > err)
2179 break;
2180 }
2181 return ((int)*defaulterrp);
2182 } else
2183 return (err & 0xffff);
2184 }
2185 if (err <= ELAST)
2186 return ((int)nfsrv_v2errmap[err - 1]);
2187 return (NFSERR_IO);
2188}
2189
2190int
dadab5e9 2191nfsrv_object_create(struct vnode *vp)
984263bc 2192{
dadab5e9 2193 struct thread *td = curthread;
984263bc
MD
2194
2195 if (vp == NULL || vp->v_type != VREG)
2196 return (1);
3b568787 2197 return (vfs_object_create(vp, td));
984263bc
MD
2198}
2199
2200/*
2201 * Sort the group list in increasing numerical order.
2202 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort
2203 * that used to be here.)
2204 */
2205void
2206nfsrvw_sort(list, num)
40393ded
RG
2207 gid_t *list;
2208 int num;
984263bc 2209{
40393ded 2210 int i, j;
984263bc
MD
2211 gid_t v;
2212
2213 /* Insertion sort. */
2214 for (i = 1; i < num; i++) {
2215 v = list[i];
2216 /* find correct slot for value v, moving others up */
2217 for (j = i; --j >= 0 && v < list[j];)
2218 list[j + 1] = list[j];
2219 list[j + 1] = v;
2220 }
2221}
2222
2223/*
2224 * copy credentials making sure that the result can be compared with bcmp().
2225 */
2226void
2227nfsrv_setcred(incred, outcred)
40393ded 2228 struct ucred *incred, *outcred;
984263bc 2229{
40393ded 2230 int i;
984263bc
MD
2231
2232 bzero((caddr_t)outcred, sizeof (struct ucred));
2233 outcred->cr_ref = 1;
2234 outcred->cr_uid = incred->cr_uid;
2235 outcred->cr_ngroups = incred->cr_ngroups;
2236 for (i = 0; i < incred->cr_ngroups; i++)
2237 outcred->cr_groups[i] = incred->cr_groups[i];
2238 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups);
2239}
2240#endif /* NFS_NOSERVER */