38 */
39
40/*
41 * These functions support the macros and help fiddle mbuf chains for
42 * the nfs op functions. They do things like create the rpc header and
43 * copy data between mbuf chains and uio lists.
44 */
45#include <sys/param.h>
46#include <sys/buf.h>
47#include <sys/proc.h>
48#include <sys/systm.h>
49#include <sys/kernel.h>
50#include <sys/mount.h>
51#include <sys/vnode.h>
52#include <sys/namei.h>
53#include <sys/mbuf.h>
54#include <sys/socket.h>
55#include <sys/stat.h>
56#include <sys/malloc.h>
57#include <sys/sysent.h>
58#include <sys/syscall.h>
59
60#include <vm/vm.h>
61#include <vm/vm_object.h>
62#include <vm/vm_extern.h>
63#include <vm/vm_zone.h>
64
65#include <nfs/rpcv2.h>
66#include <nfs/nfsproto.h>
67#include <nfs/nfs.h>
68#include <nfs/nfsnode.h>
69#include <nfs/xdr_subs.h>
70#include <nfs/nfsm_subs.h>
71#include <nfs/nfsmount.h>
72#include <nfs/nqnfs.h>
73#include <nfs/nfsrtt.h>
74
75#include <miscfs/specfs/specdev.h>
76
77#include <netinet/in.h>
78#ifdef ISO
79#include <netiso/iso.h>
80#endif
81
82/*
83 * Data items converted to xdr at startup, since they are constant
84 * This is kinda hokey, but may save a little time doing byte swaps
85 */
86u_int32_t nfs_xdrneg1;
87u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted,
89 rpc_auth_kerb;
90u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false;
91
92/* And other global data */
93static u_int32_t nfs_xid = 0;
94static enum vtype nv2tov_type[8]= {
95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
96};
97enum vtype nv3tov_type[8]= {
98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO
99};
100
101int nfs_mount_type;
102int nfs_ticks;
103
104struct nfs_reqq nfs_reqq;
105struct nfssvc_sockhead nfssvc_sockhead;
106int nfssvc_sockhead_flag;
107struct nfsd_head nfsd_head;
108int nfsd_head_flag;
109struct nfs_bufq nfs_bufq;
110struct nqtimerhead nqtimerhead;
111struct nqfhhashhead *nqfhhashtbl;
112u_long nqfhhash;
113
114#ifndef NFS_NOSERVER
115/*
116 * Mapping of old NFS Version 2 RPC numbers to generic numbers.
117 */
118int nfsv3_procid[NFS_NPROCS] = {
119 NFSPROC_NULL,
120 NFSPROC_GETATTR,
121 NFSPROC_SETATTR,
122 NFSPROC_NOOP,
123 NFSPROC_LOOKUP,
124 NFSPROC_READLINK,
125 NFSPROC_READ,
126 NFSPROC_NOOP,
127 NFSPROC_WRITE,
128 NFSPROC_CREATE,
129 NFSPROC_REMOVE,
130 NFSPROC_RENAME,
131 NFSPROC_LINK,
132 NFSPROC_SYMLINK,
133 NFSPROC_MKDIR,
134 NFSPROC_RMDIR,
135 NFSPROC_READDIR,
136 NFSPROC_FSSTAT,
137 NFSPROC_NOOP,
138 NFSPROC_NOOP,
139 NFSPROC_NOOP,
140 NFSPROC_NOOP,
141 NFSPROC_NOOP,
142 NFSPROC_NOOP,
143 NFSPROC_NOOP,
144 NFSPROC_NOOP
145};
146
147#endif /* NFS_NOSERVER */
148/*
149 * and the reverse mapping from generic to Version 2 procedure numbers
150 */
151int nfsv2_procid[NFS_NPROCS] = {
152 NFSV2PROC_NULL,
153 NFSV2PROC_GETATTR,
154 NFSV2PROC_SETATTR,
155 NFSV2PROC_LOOKUP,
156 NFSV2PROC_NOOP,
157 NFSV2PROC_READLINK,
158 NFSV2PROC_READ,
159 NFSV2PROC_WRITE,
160 NFSV2PROC_CREATE,
161 NFSV2PROC_MKDIR,
162 NFSV2PROC_SYMLINK,
163 NFSV2PROC_CREATE,
164 NFSV2PROC_REMOVE,
165 NFSV2PROC_RMDIR,
166 NFSV2PROC_RENAME,
167 NFSV2PROC_LINK,
168 NFSV2PROC_READDIR,
169 NFSV2PROC_NOOP,
170 NFSV2PROC_STATFS,
171 NFSV2PROC_NOOP,
172 NFSV2PROC_NOOP,
173 NFSV2PROC_NOOP,
174 NFSV2PROC_NOOP,
175 NFSV2PROC_NOOP,
176 NFSV2PROC_NOOP,
177 NFSV2PROC_NOOP,
178};
179
180#ifndef NFS_NOSERVER
181/*
182 * Maps errno values to nfs error numbers.
183 * Use NFSERR_IO as the catch all for ones not specifically defined in
184 * RFC 1094.
185 */
186static u_char nfsrv_v2errmap[ELAST] = {
187 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO,
188 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
189 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO,
190 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR,
191 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
192 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS,
193 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
194 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
195 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
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_NAMETOL, NFSERR_IO, NFSERR_IO,
200 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE,
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 /* << Last is 83 */
204};
205
206/*
207 * Maps errno values to nfs error numbers.
208 * Although it is not obvious whether or not NFS clients really care if
209 * a returned error value is in the specified list for the procedure, the
210 * safest thing to do is filter them appropriately. For Version 2, the
211 * X/Open XNFS document is the only specification that defines error values
212 * for each RPC (The RFC simply lists all possible error values for all RPCs),
213 * so I have decided to not do this for Version 2.
214 * The first entry is the default error return and the rest are the valid
215 * errors for that RPC in increasing numeric order.
216 */
217static short nfsv3err_null[] = {
218 0,
219 0,
220};
221
222static short nfsv3err_getattr[] = {
223 NFSERR_IO,
224 NFSERR_IO,
225 NFSERR_STALE,
226 NFSERR_BADHANDLE,
227 NFSERR_SERVERFAULT,
228 0,
229};
230
231static short nfsv3err_setattr[] = {
232 NFSERR_IO,
233 NFSERR_PERM,
234 NFSERR_IO,
235 NFSERR_ACCES,
236 NFSERR_INVAL,
237 NFSERR_NOSPC,
238 NFSERR_ROFS,
239 NFSERR_DQUOT,
240 NFSERR_STALE,
241 NFSERR_BADHANDLE,
242 NFSERR_NOT_SYNC,
243 NFSERR_SERVERFAULT,
244 0,
245};
246
247static short nfsv3err_lookup[] = {
248 NFSERR_IO,
249 NFSERR_NOENT,
250 NFSERR_IO,
251 NFSERR_ACCES,
252 NFSERR_NOTDIR,
253 NFSERR_NAMETOL,
254 NFSERR_STALE,
255 NFSERR_BADHANDLE,
256 NFSERR_SERVERFAULT,
257 0,
258};
259
260static short nfsv3err_access[] = {
261 NFSERR_IO,
262 NFSERR_IO,
263 NFSERR_STALE,
264 NFSERR_BADHANDLE,
265 NFSERR_SERVERFAULT,
266 0,
267};
268
269static short nfsv3err_readlink[] = {
270 NFSERR_IO,
271 NFSERR_IO,
272 NFSERR_ACCES,
273 NFSERR_INVAL,
274 NFSERR_STALE,
275 NFSERR_BADHANDLE,
276 NFSERR_NOTSUPP,
277 NFSERR_SERVERFAULT,
278 0,
279};
280
281static short nfsv3err_read[] = {
282 NFSERR_IO,
283 NFSERR_IO,
284 NFSERR_NXIO,
285 NFSERR_ACCES,
286 NFSERR_INVAL,
287 NFSERR_STALE,
288 NFSERR_BADHANDLE,
289 NFSERR_SERVERFAULT,
290 0,
291};
292
293static short nfsv3err_write[] = {
294 NFSERR_IO,
295 NFSERR_IO,
296 NFSERR_ACCES,
297 NFSERR_INVAL,
298 NFSERR_FBIG,
299 NFSERR_NOSPC,
300 NFSERR_ROFS,
301 NFSERR_DQUOT,
302 NFSERR_STALE,
303 NFSERR_BADHANDLE,
304 NFSERR_SERVERFAULT,
305 0,
306};
307
308static short nfsv3err_create[] = {
309 NFSERR_IO,
310 NFSERR_IO,
311 NFSERR_ACCES,
312 NFSERR_EXIST,
313 NFSERR_NOTDIR,
314 NFSERR_NOSPC,
315 NFSERR_ROFS,
316 NFSERR_NAMETOL,
317 NFSERR_DQUOT,
318 NFSERR_STALE,
319 NFSERR_BADHANDLE,
320 NFSERR_NOTSUPP,
321 NFSERR_SERVERFAULT,
322 0,
323};
324
325static short nfsv3err_mkdir[] = {
326 NFSERR_IO,
327 NFSERR_IO,
328 NFSERR_ACCES,
329 NFSERR_EXIST,
330 NFSERR_NOTDIR,
331 NFSERR_NOSPC,
332 NFSERR_ROFS,
333 NFSERR_NAMETOL,
334 NFSERR_DQUOT,
335 NFSERR_STALE,
336 NFSERR_BADHANDLE,
337 NFSERR_NOTSUPP,
338 NFSERR_SERVERFAULT,
339 0,
340};
341
342static short nfsv3err_symlink[] = {
343 NFSERR_IO,
344 NFSERR_IO,
345 NFSERR_ACCES,
346 NFSERR_EXIST,
347 NFSERR_NOTDIR,
348 NFSERR_NOSPC,
349 NFSERR_ROFS,
350 NFSERR_NAMETOL,
351 NFSERR_DQUOT,
352 NFSERR_STALE,
353 NFSERR_BADHANDLE,
354 NFSERR_NOTSUPP,
355 NFSERR_SERVERFAULT,
356 0,
357};
358
359static short nfsv3err_mknod[] = {
360 NFSERR_IO,
361 NFSERR_IO,
362 NFSERR_ACCES,
363 NFSERR_EXIST,
364 NFSERR_NOTDIR,
365 NFSERR_NOSPC,
366 NFSERR_ROFS,
367 NFSERR_NAMETOL,
368 NFSERR_DQUOT,
369 NFSERR_STALE,
370 NFSERR_BADHANDLE,
371 NFSERR_NOTSUPP,
372 NFSERR_SERVERFAULT,
373 NFSERR_BADTYPE,
374 0,
375};
376
377static short nfsv3err_remove[] = {
378 NFSERR_IO,
379 NFSERR_NOENT,
380 NFSERR_IO,
381 NFSERR_ACCES,
382 NFSERR_NOTDIR,
383 NFSERR_ROFS,
384 NFSERR_NAMETOL,
385 NFSERR_STALE,
386 NFSERR_BADHANDLE,
387 NFSERR_SERVERFAULT,
388 0,
389};
390
391static short nfsv3err_rmdir[] = {
392 NFSERR_IO,
393 NFSERR_NOENT,
394 NFSERR_IO,
395 NFSERR_ACCES,
396 NFSERR_EXIST,
397 NFSERR_NOTDIR,
398 NFSERR_INVAL,
399 NFSERR_ROFS,
400 NFSERR_NAMETOL,
401 NFSERR_NOTEMPTY,
402 NFSERR_STALE,
403 NFSERR_BADHANDLE,
404 NFSERR_NOTSUPP,
405 NFSERR_SERVERFAULT,
406 0,
407};
408
409static short nfsv3err_rename[] = {
410 NFSERR_IO,
411 NFSERR_NOENT,
412 NFSERR_IO,
413 NFSERR_ACCES,
414 NFSERR_EXIST,
415 NFSERR_XDEV,
416 NFSERR_NOTDIR,
417 NFSERR_ISDIR,
418 NFSERR_INVAL,
419 NFSERR_NOSPC,
420 NFSERR_ROFS,
421 NFSERR_MLINK,
422 NFSERR_NAMETOL,
423 NFSERR_NOTEMPTY,
424 NFSERR_DQUOT,
425 NFSERR_STALE,
426 NFSERR_BADHANDLE,
427 NFSERR_NOTSUPP,
428 NFSERR_SERVERFAULT,
429 0,
430};
431
432static short nfsv3err_link[] = {
433 NFSERR_IO,
434 NFSERR_IO,
435 NFSERR_ACCES,
436 NFSERR_EXIST,
437 NFSERR_XDEV,
438 NFSERR_NOTDIR,
439 NFSERR_INVAL,
440 NFSERR_NOSPC,
441 NFSERR_ROFS,
442 NFSERR_MLINK,
443 NFSERR_NAMETOL,
444 NFSERR_DQUOT,
445 NFSERR_STALE,
446 NFSERR_BADHANDLE,
447 NFSERR_NOTSUPP,
448 NFSERR_SERVERFAULT,
449 0,
450};
451
452static short nfsv3err_readdir[] = {
453 NFSERR_IO,
454 NFSERR_IO,
455 NFSERR_ACCES,
456 NFSERR_NOTDIR,
457 NFSERR_STALE,
458 NFSERR_BADHANDLE,
459 NFSERR_BAD_COOKIE,
460 NFSERR_TOOSMALL,
461 NFSERR_SERVERFAULT,
462 0,
463};
464
465static short nfsv3err_readdirplus[] = {
466 NFSERR_IO,
467 NFSERR_IO,
468 NFSERR_ACCES,
469 NFSERR_NOTDIR,
470 NFSERR_STALE,
471 NFSERR_BADHANDLE,
472 NFSERR_BAD_COOKIE,
473 NFSERR_NOTSUPP,
474 NFSERR_TOOSMALL,
475 NFSERR_SERVERFAULT,
476 0,
477};
478
479static short nfsv3err_fsstat[] = {
480 NFSERR_IO,
481 NFSERR_IO,
482 NFSERR_STALE,
483 NFSERR_BADHANDLE,
484 NFSERR_SERVERFAULT,
485 0,
486};
487
488static short nfsv3err_fsinfo[] = {
489 NFSERR_STALE,
490 NFSERR_STALE,
491 NFSERR_BADHANDLE,
492 NFSERR_SERVERFAULT,
493 0,
494};
495
496static short nfsv3err_pathconf[] = {
497 NFSERR_STALE,
498 NFSERR_STALE,
499 NFSERR_BADHANDLE,
500 NFSERR_SERVERFAULT,
501 0,
502};
503
504static short nfsv3err_commit[] = {
505 NFSERR_IO,
506 NFSERR_IO,
507 NFSERR_STALE,
508 NFSERR_BADHANDLE,
509 NFSERR_SERVERFAULT,
510 0,
511};
512
513static short *nfsrv_v3errmap[] = {
514 nfsv3err_null,
515 nfsv3err_getattr,
516 nfsv3err_setattr,
517 nfsv3err_lookup,
518 nfsv3err_access,
519 nfsv3err_readlink,
520 nfsv3err_read,
521 nfsv3err_write,
522 nfsv3err_create,
523 nfsv3err_mkdir,
524 nfsv3err_symlink,
525 nfsv3err_mknod,
526 nfsv3err_remove,
527 nfsv3err_rmdir,
528 nfsv3err_rename,
529 nfsv3err_link,
530 nfsv3err_readdir,
531 nfsv3err_readdirplus,
532 nfsv3err_fsstat,
533 nfsv3err_fsinfo,
534 nfsv3err_pathconf,
535 nfsv3err_commit,
536};
537
538#endif /* NFS_NOSERVER */
539
540extern struct nfsrtt nfsrtt;
541extern time_t nqnfsstarttime;
542extern int nqsrv_clockskew;
543extern int nqsrv_writeslack;
544extern int nqsrv_maxlease;
545extern struct nfsstats nfsstats;
546extern int nqnfs_piggy[NFS_NPROCS];
547extern nfstype nfsv2_type[9];
548extern nfstype nfsv3_type[9];
549extern struct nfsnodehashhead *nfsnodehashtbl;
550extern u_long nfsnodehash;
551
552struct getfh_args;
553extern int getfh(struct proc *, struct getfh_args *, int *);
554struct nfssvc_args;
555extern int nfssvc(struct proc *, struct nfssvc_args *, int *);
556
557LIST_HEAD(nfsnodehashhead, nfsnode);
558
559int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *));
560
561u_quad_t
562nfs_curusec()
563{
564 struct timeval tv;
565
566 getmicrotime(&tv);
567 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec);
568}
569
570/*
571 * Create the header for an rpc request packet
572 * The hsiz is the size of the rest of the nfs request header.
573 * (just used to decide if a cluster is a good idea)
574 */
575struct mbuf *
576nfsm_reqh(vp, procid, hsiz, bposp)
577 struct vnode *vp;
578 u_long procid;
579 int hsiz;
580 caddr_t *bposp;
581{
582 register struct mbuf *mb;
583 register u_int32_t *tl;
584 register caddr_t bpos;
585 struct mbuf *mb2;
586 struct nfsmount *nmp;
587 int nqflag;
588
589 MGET(mb, M_WAIT, MT_DATA);
590 if (hsiz >= MINCLSIZE)
591 MCLGET(mb, M_WAIT);
592 mb->m_len = 0;
593 bpos = mtod(mb, caddr_t);
594
595 /*
596 * For NQNFS, add lease request.
597 */
598 if (vp) {
599 nmp = VFSTONFS(vp->v_mount);
600 if (nmp->nm_flag & NFSMNT_NQNFS) {
601 nqflag = NQNFS_NEEDLEASE(vp, procid);
602 if (nqflag) {
603 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED);
604 *tl++ = txdr_unsigned(nqflag);
605 *tl = txdr_unsigned(nmp->nm_leaseterm);
606 } else {
607 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
608 *tl = 0;
609 }
610 }
611 }
612 /* Finally, return values */
613 *bposp = bpos;
614 return (mb);
615}
616
617/*
618 * Build the RPC header and fill in the authorization info.
619 * The authorization string argument is only used when the credentials
620 * come from outside of the kernel.
621 * Returns the head of the mbuf list.
622 */
623struct mbuf *
624nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len,
625 verf_str, mrest, mrest_len, mbp, xidp)
626 register struct ucred *cr;
627 int nmflag;
628 int procid;
629 int auth_type;
630 int auth_len;
631 char *auth_str;
632 int verf_len;
633 char *verf_str;
634 struct mbuf *mrest;
635 int mrest_len;
636 struct mbuf **mbp;
637 u_int32_t *xidp;
638{
639 register struct mbuf *mb;
640 register u_int32_t *tl;
641 register caddr_t bpos;
642 register int i;
643 struct mbuf *mreq, *mb2;
644 int siz, grpsiz, authsiz;
645 static u_int32_t base;
646
647 authsiz = nfsm_rndup(auth_len);
648 MGETHDR(mb, M_WAIT, MT_DATA);
649 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
650 MCLGET(mb, M_WAIT);
651 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
652 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
653 } else {
654 MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
655 }
656 mb->m_len = 0;
657 mreq = mb;
658 bpos = mtod(mb, caddr_t);
659
660 /*
661 * First the RPC header.
662 */
663 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
664
665 /* Get a pretty random xid to start with */
666 if (!nfs_xid)
667 nfs_xid = random();
668 /*
669 * Skip zero xid if it should ever happen.
670 */
671 if (++nfs_xid == 0)
672 nfs_xid++;
673
674 *tl++ = *xidp = txdr_unsigned(nfs_xid);
675 *tl++ = rpc_call;
676 *tl++ = rpc_vers;
677 if (nmflag & NFSMNT_NQNFS) {
678 *tl++ = txdr_unsigned(NQNFS_PROG);
679 *tl++ = txdr_unsigned(NQNFS_VER3);
680 } else {
681 *tl++ = txdr_unsigned(NFS_PROG);
682 if (nmflag & NFSMNT_NFSV3)
683 *tl++ = txdr_unsigned(NFS_VER3);
684 else
685 *tl++ = txdr_unsigned(NFS_VER2);
686 }
687 if (nmflag & NFSMNT_NFSV3)
688 *tl++ = txdr_unsigned(procid);
689 else
690 *tl++ = txdr_unsigned(nfsv2_procid[procid]);
691
692 /*
693 * And then the authorization cred.
694 */
695 *tl++ = txdr_unsigned(auth_type);
696 *tl = txdr_unsigned(authsiz);
697 switch (auth_type) {
698 case RPCAUTH_UNIX:
699 nfsm_build(tl, u_int32_t *, auth_len);
700 *tl++ = 0; /* stamp ?? */
701 *tl++ = 0; /* NULL hostname */
702 *tl++ = txdr_unsigned(cr->cr_uid);
703 *tl++ = txdr_unsigned(cr->cr_groups[0]);
704 grpsiz = (auth_len >> 2) - 5;
705 *tl++ = txdr_unsigned(grpsiz);
706 for (i = 1; i <= grpsiz; i++)
707 *tl++ = txdr_unsigned(cr->cr_groups[i]);
708 break;
709 case RPCAUTH_KERB4:
710 siz = auth_len;
711 while (siz > 0) {
712 if (M_TRAILINGSPACE(mb) == 0) {
713 MGET(mb2, M_WAIT, MT_DATA);
714 if (siz >= MINCLSIZE)
715 MCLGET(mb2, M_WAIT);
716 mb->m_next = mb2;
717 mb = mb2;
718 mb->m_len = 0;
719 bpos = mtod(mb, caddr_t);
720 }
721 i = min(siz, M_TRAILINGSPACE(mb));
722 bcopy(auth_str, bpos, i);
723 mb->m_len += i;
724 auth_str += i;
725 bpos += i;
726 siz -= i;
727 }
728 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) {
729 for (i = 0; i < siz; i++)
730 *bpos++ = '\0';
731 mb->m_len += siz;
732 }
733 break;
734 };
735
736 /*
737 * And the verifier...
738 */
739 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
740 if (verf_str) {
741 *tl++ = txdr_unsigned(RPCAUTH_KERB4);
742 *tl = txdr_unsigned(verf_len);
743 siz = verf_len;
744 while (siz > 0) {
745 if (M_TRAILINGSPACE(mb) == 0) {
746 MGET(mb2, M_WAIT, MT_DATA);
747 if (siz >= MINCLSIZE)
748 MCLGET(mb2, M_WAIT);
749 mb->m_next = mb2;
750 mb = mb2;
751 mb->m_len = 0;
752 bpos = mtod(mb, caddr_t);
753 }
754 i = min(siz, M_TRAILINGSPACE(mb));
755 bcopy(verf_str, bpos, i);
756 mb->m_len += i;
757 verf_str += i;
758 bpos += i;
759 siz -= i;
760 }
761 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) {
762 for (i = 0; i < siz; i++)
763 *bpos++ = '\0';
764 mb->m_len += siz;
765 }
766 } else {
767 *tl++ = txdr_unsigned(RPCAUTH_NULL);
768 *tl = 0;
769 }
770 mb->m_next = mrest;
771 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
772 mreq->m_pkthdr.rcvif = (struct ifnet *)0;
773 *mbp = mb;
774 return (mreq);
775}
776
777/*
778 * copies mbuf chain to the uio scatter/gather list
779 */
780int
781nfsm_mbuftouio(mrep, uiop, siz, dpos)
782 struct mbuf **mrep;
783 register struct uio *uiop;
784 int siz;
785 caddr_t *dpos;
786{
787 register char *mbufcp, *uiocp;
788 register int xfer, left, len;
789 register struct mbuf *mp;
790 long uiosiz, rem;
791 int error = 0;
792
793 mp = *mrep;
794 mbufcp = *dpos;
795 len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
796 rem = nfsm_rndup(siz)-siz;
797 while (siz > 0) {
798 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
799 return (EFBIG);
800 left = uiop->uio_iov->iov_len;
801 uiocp = uiop->uio_iov->iov_base;
802 if (left > siz)
803 left = siz;
804 uiosiz = left;
805 while (left > 0) {
806 while (len == 0) {
807 mp = mp->m_next;
808 if (mp == NULL)
809 return (EBADRPC);
810 mbufcp = mtod(mp, caddr_t);
811 len = mp->m_len;
812 }
813 xfer = (left > len) ? len : left;
814#ifdef notdef
815 /* Not Yet.. */
816 if (uiop->uio_iov->iov_op != NULL)
817 (*(uiop->uio_iov->iov_op))
818 (mbufcp, uiocp, xfer);
819 else
820#endif
821 if (uiop->uio_segflg == UIO_SYSSPACE)
822 bcopy(mbufcp, uiocp, xfer);
823 else
824 copyout(mbufcp, uiocp, xfer);
825 left -= xfer;
826 len -= xfer;
827 mbufcp += xfer;
828 uiocp += xfer;
829 uiop->uio_offset += xfer;
830 uiop->uio_resid -= xfer;
831 }
832 if (uiop->uio_iov->iov_len <= siz) {
833 uiop->uio_iovcnt--;
834 uiop->uio_iov++;
835 } else {
836 uiop->uio_iov->iov_base += uiosiz;
837 uiop->uio_iov->iov_len -= uiosiz;
838 }
839 siz -= uiosiz;
840 }
841 *dpos = mbufcp;
842 *mrep = mp;
843 if (rem > 0) {
844 if (len < rem)
845 error = nfs_adv(mrep, dpos, rem, len);
846 else
847 *dpos += rem;
848 }
849 return (error);
850}
851
852/*
853 * copies a uio scatter/gather list to an mbuf chain.
854 * NOTE: can ony handle iovcnt == 1
855 */
856int
857nfsm_uiotombuf(uiop, mq, siz, bpos)
858 register struct uio *uiop;
859 struct mbuf **mq;
860 int siz;
861 caddr_t *bpos;
862{
863 register char *uiocp;
864 register struct mbuf *mp, *mp2;
865 register int xfer, left, mlen;
866 int uiosiz, clflg, rem;
867 char *cp;
868
869#ifdef DIAGNOSTIC
870 if (uiop->uio_iovcnt != 1)
871 panic("nfsm_uiotombuf: iovcnt != 1");
872#endif
873
874 if (siz > MLEN) /* or should it >= MCLBYTES ?? */
875 clflg = 1;
876 else
877 clflg = 0;
878 rem = nfsm_rndup(siz)-siz;
879 mp = mp2 = *mq;
880 while (siz > 0) {
881 left = uiop->uio_iov->iov_len;
882 uiocp = uiop->uio_iov->iov_base;
883 if (left > siz)
884 left = siz;
885 uiosiz = left;
886 while (left > 0) {
887 mlen = M_TRAILINGSPACE(mp);
888 if (mlen == 0) {
889 MGET(mp, M_WAIT, MT_DATA);
890 if (clflg)
891 MCLGET(mp, M_WAIT);
892 mp->m_len = 0;
893 mp2->m_next = mp;
894 mp2 = mp;
895 mlen = M_TRAILINGSPACE(mp);
896 }
897 xfer = (left > mlen) ? mlen : left;
898#ifdef notdef
899 /* Not Yet.. */
900 if (uiop->uio_iov->iov_op != NULL)
901 (*(uiop->uio_iov->iov_op))
902 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
903 else
904#endif
905 if (uiop->uio_segflg == UIO_SYSSPACE)
906 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
907 else
908 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
909 mp->m_len += xfer;
910 left -= xfer;
911 uiocp += xfer;
912 uiop->uio_offset += xfer;
913 uiop->uio_resid -= xfer;
914 }
915 uiop->uio_iov->iov_base += uiosiz;
916 uiop->uio_iov->iov_len -= uiosiz;
917 siz -= uiosiz;
918 }
919 if (rem > 0) {
920 if (rem > M_TRAILINGSPACE(mp)) {
921 MGET(mp, M_WAIT, MT_DATA);
922 mp->m_len = 0;
923 mp2->m_next = mp;
924 }
925 cp = mtod(mp, caddr_t)+mp->m_len;
926 for (left = 0; left < rem; left++)
927 *cp++ = '\0';
928 mp->m_len += rem;
929 *bpos = cp;
930 } else
931 *bpos = mtod(mp, caddr_t)+mp->m_len;
932 *mq = mp;
933 return (0);
934}
935
936/*
937 * Help break down an mbuf chain by setting the first siz bytes contiguous
938 * pointed to by returned val.
939 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough
940 * cases. (The macros use the vars. dpos and dpos2)
941 */
942int
943nfsm_disct(mdp, dposp, siz, left, cp2)
944 struct mbuf **mdp;
945 caddr_t *dposp;
946 int siz;
947 int left;
948 caddr_t *cp2;
949{
950 register struct mbuf *mp, *mp2;
951 register int siz2, xfer;
952 register caddr_t p;
953
954 mp = *mdp;
955 while (left == 0) {
956 *mdp = mp = mp->m_next;
957 if (mp == NULL)
958 return (EBADRPC);
959 left = mp->m_len;
960 *dposp = mtod(mp, caddr_t);
961 }
962 if (left >= siz) {
963 *cp2 = *dposp;
964 *dposp += siz;
965 } else if (mp->m_next == NULL) {
966 return (EBADRPC);
967 } else if (siz > MHLEN) {
968 panic("nfs S too big");
969 } else {
970 MGET(mp2, M_WAIT, MT_DATA);
971 mp2->m_next = mp->m_next;
972 mp->m_next = mp2;
973 mp->m_len -= left;
974 mp = mp2;
975 *cp2 = p = mtod(mp, caddr_t);
976 bcopy(*dposp, p, left); /* Copy what was left */
977 siz2 = siz-left;
978 p += left;
979 mp2 = mp->m_next;
980 /* Loop around copying up the siz2 bytes */
981 while (siz2 > 0) {
982 if (mp2 == NULL)
983 return (EBADRPC);
984 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2;
985 if (xfer > 0) {
986 bcopy(mtod(mp2, caddr_t), p, xfer);
987 NFSMADV(mp2, xfer);
988 mp2->m_len -= xfer;
989 p += xfer;
990 siz2 -= xfer;
991 }
992 if (siz2 > 0)
993 mp2 = mp2->m_next;
994 }
995 mp->m_len = siz;
996 *mdp = mp2;
997 *dposp = mtod(mp2, caddr_t);
998 }
999 return (0);
1000}
1001
1002/*
1003 * Advance the position in the mbuf chain.
1004 */
1005int
1006nfs_adv(mdp, dposp, offs, left)
1007 struct mbuf **mdp;
1008 caddr_t *dposp;
1009 int offs;
1010 int left;
1011{
1012 register struct mbuf *m;
1013 register int s;
1014
1015 m = *mdp;
1016 s = left;
1017 while (s < offs) {
1018 offs -= s;
1019 m = m->m_next;
1020 if (m == NULL)
1021 return (EBADRPC);
1022 s = m->m_len;
1023 }
1024 *mdp = m;
1025 *dposp = mtod(m, caddr_t)+offs;
1026 return (0);
1027}
1028
1029/*
1030 * Copy a string into mbufs for the hard cases...
1031 */
1032int
1033nfsm_strtmbuf(mb, bpos, cp, siz)
1034 struct mbuf **mb;
1035 char **bpos;
1036 const char *cp;
1037 long siz;
1038{
1039 register struct mbuf *m1 = NULL, *m2;
1040 long left, xfer, len, tlen;
1041 u_int32_t *tl;
1042 int putsize;
1043
1044 putsize = 1;
1045 m2 = *mb;
1046 left = M_TRAILINGSPACE(m2);
1047 if (left > 0) {
1048 tl = ((u_int32_t *)(*bpos));
1049 *tl++ = txdr_unsigned(siz);
1050 putsize = 0;
1051 left -= NFSX_UNSIGNED;
1052 m2->m_len += NFSX_UNSIGNED;
1053 if (left > 0) {
1054 bcopy(cp, (caddr_t) tl, left);
1055 siz -= left;
1056 cp += left;
1057 m2->m_len += left;
1058 left = 0;
1059 }
1060 }
1061 /* Loop around adding mbufs */
1062 while (siz > 0) {
1063 MGET(m1, M_WAIT, MT_DATA);
1064 if (siz > MLEN)
1065 MCLGET(m1, M_WAIT);
1066 m1->m_len = NFSMSIZ(m1);
1067 m2->m_next = m1;
1068 m2 = m1;
1069 tl = mtod(m1, u_int32_t *);
1070 tlen = 0;
1071 if (putsize) {
1072 *tl++ = txdr_unsigned(siz);
1073 m1->m_len -= NFSX_UNSIGNED;
1074 tlen = NFSX_UNSIGNED;
1075 putsize = 0;
1076 }
1077 if (siz < m1->m_len) {
1078 len = nfsm_rndup(siz);
1079 xfer = siz;
1080 if (xfer < len)
1081 *(tl+(xfer>>2)) = 0;
1082 } else {
1083 xfer = len = m1->m_len;
1084 }
1085 bcopy(cp, (caddr_t) tl, xfer);
1086 m1->m_len = len+tlen;
1087 siz -= xfer;
1088 cp += xfer;
1089 }
1090 *mb = m1;
1091 *bpos = mtod(m1, caddr_t)+m1->m_len;
1092 return (0);
1093}
1094
1095/*
1096 * Called once to initialize data structures...
1097 */
1098int
1099nfs_init(vfsp)
1100 struct vfsconf *vfsp;
1101{
1102 register int i;
1103
1104 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1);
1105
1106 /*
1107 * Check to see if major data structures haven't bloated.
1108 */
1109 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) {
1110 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC);
1111 printf("Try reducing NFS_UIDHASHSIZ\n");
1112 }
1113 if (sizeof (struct nfsuid) > NFS_UIDALLOC) {
1114 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC);
1115 printf("Try unionizing the nu_nickname and nu_flag fields\n");
1116 }
1117 nfs_mount_type = vfsp->vfc_typenum;
1118 nfsrtt.pos = 0;
1119 rpc_vers = txdr_unsigned(RPC_VER2);
1120 rpc_call = txdr_unsigned(RPC_CALL);
1121 rpc_reply = txdr_unsigned(RPC_REPLY);
1122 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
1123 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
1124 rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
1125 rpc_autherr = txdr_unsigned(RPC_AUTHERR);
1126 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
1127 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4);
1128 nfs_prog = txdr_unsigned(NFS_PROG);
1129 nqnfs_prog = txdr_unsigned(NQNFS_PROG);
1130 nfs_true = txdr_unsigned(TRUE);
1131 nfs_false = txdr_unsigned(FALSE);
1132 nfs_xdrneg1 = txdr_unsigned(-1);
1133 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
1134 if (nfs_ticks < 1)
1135 nfs_ticks = 1;
1136 /* Ensure async daemons disabled */
1137 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
1138 nfs_iodwant[i] = (struct proc *)0;
1139 nfs_iodmount[i] = (struct nfsmount *)0;
1140 }
1141 nfs_nhinit(); /* Init the nfsnode table */
1142#ifndef NFS_NOSERVER
1143 nfsrv_init(0); /* Init server data structures */
1144 nfsrv_initcache(); /* Init the server request cache */
1145#endif
1146
1147 /*
1148 * Initialize the nqnfs server stuff.
1149 */
1150 if (nqnfsstarttime == 0) {
1151 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease
1152 + nqsrv_clockskew + nqsrv_writeslack;
1153 NQLOADNOVRAM(nqnfsstarttime);
1154 CIRCLEQ_INIT(&nqtimerhead);
1155 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash);
1156 }
1157
1158 /*
1159 * Initialize reply list and start timer
1160 */
1161 TAILQ_INIT(&nfs_reqq);
1162
1163 nfs_timer(0);
1164
1165
1166 /*
1167 * Set up lease_check and lease_updatetime so that other parts
1168 * of the system can call us, if we are loadable.
1169 */
1170#ifndef NFS_NOSERVER
1171 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check;
1172#endif
1173 lease_updatetime = nfs_lease_updatetime;
1174 vfsp->vfc_refcount++; /* make us non-unloadable */
1175 sysent[SYS_nfssvc].sy_narg = 2;
1176 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc;
1177#ifndef NFS_NOSERVER
1178 sysent[SYS_getfh].sy_narg = 2;
1179 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh;
1180#endif
1181
1182 return (0);
1183}
1184
1185/*
1186 * Attribute cache routines.
1187 * nfs_loadattrcache() - loads or updates the cache contents from attributes
1188 * that are on the mbuf list
1189 * nfs_getattrcache() - returns valid attributes if found in cache, returns
1190 * error otherwise
1191 */
1192
1193/*
1194 * Load the attribute cache (that lives in the nfsnode entry) with
1195 * the values on the mbuf list and
1196 * Iff vap not NULL
1197 * copy the attributes to *vaper
1198 */
1199int
1200nfs_loadattrcache(vpp, mdp, dposp, vaper)
1201 struct vnode **vpp;
1202 struct mbuf **mdp;
1203 caddr_t *dposp;
1204 struct vattr *vaper;
1205{
1206 register struct vnode *vp = *vpp;
1207 register struct vattr *vap;
1208 register struct nfs_fattr *fp;
1209 register struct nfsnode *np;
1210 register int32_t t1;
1211 caddr_t cp2;
1212 int error = 0, rdev;
1213 struct mbuf *md;
1214 enum vtype vtyp;
1215 u_short vmode;
1216 struct timespec mtime;
1217 struct vnode *nvp;
1218 int v3 = NFS_ISV3(vp);
1219
1220 md = *mdp;
1221 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
1222 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2))
1223 return (error);
1224 fp = (struct nfs_fattr *)cp2;
1225 if (v3) {
1226 vtyp = nfsv3tov_type(fp->fa_type);
1227 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1228 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
1229 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
1230 fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
1231 } else {
1232 vtyp = nfsv2tov_type(fp->fa_type);
1233 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1234 /*
1235 * XXX
1236 *
1237 * The duplicate information returned in fa_type and fa_mode
1238 * is an ambiguity in the NFS version 2 protocol.
1239 *
1240 * VREG should be taken literally as a regular file. If a
1241 * server intents to return some type information differently
1242 * in the upper bits of the mode field (e.g. for sockets, or
1243 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
1244 * leave the examination of the mode bits even in the VREG
1245 * case to avoid breakage for bogus servers, but we make sure
1246 * that there are actually type bits set in the upper part of
1247 * fa_mode (and failing that, trust the va_type field).
1248 *
1249 * NFSv3 cleared the issue, and requires fa_mode to not
1250 * contain any type information (while also introduing sockets
1251 * and FIFOs for fa_type).
1252 */
1253 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
1254 vtyp = IFTOVT(vmode);
1255 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
1256 fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
1257
1258 /*
1259 * Really ugly NFSv2 kludge.
1260 */
1261 if (vtyp == VCHR && rdev == 0xffffffff)
1262 vtyp = VFIFO;
1263 }
1264
1265 /*
1266 * If v_type == VNON it is a new node, so fill in the v_type,
1267 * n_mtime fields. Check to see if it represents a special
1268 * device, and if so, check for a possible alias. Once the
1269 * correct vnode has been obtained, fill in the rest of the
1270 * information.
1271 */
1272 np = VTONFS(vp);
1273 if (vp->v_type != vtyp) {
1274 vp->v_type = vtyp;
1275 if (vp->v_type == VFIFO) {
1276 vp->v_op = fifo_nfsv2nodeop_p;
1277 }
1278 if (vp->v_type == VCHR || vp->v_type == VBLK) {
1279 vp->v_op = spec_nfsv2nodeop_p;
1280 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount);
1281 if (nvp) {
1282 /*
1283 * Discard unneeded vnode, but save its nfsnode.
1284 * Since the nfsnode does not have a lock, its
1285 * vnode lock has to be carried over.
1286 */
1287 nvp->v_vnlock = vp->v_vnlock;
1288 vp->v_vnlock = NULL;
1289 nvp->v_data = vp->v_data;
1290 vp->v_data = NULL;
1291 vp->v_op = spec_vnodeop_p;
1292 vrele(vp);
1293 vgone(vp);
1294 /*
1295 * Reinitialize aliased node.
1296 */
1297 np->n_vnode = nvp;
1298 *vpp = vp = nvp;
1299 }
1300 }
1301 np->n_mtime = mtime.tv_sec;
1302 }
1303 vap = &np->n_vattr;
1304 vap->va_type = vtyp;
1305 vap->va_mode = (vmode & 07777);
1306 vap->va_rdev = (dev_t)rdev;
1307 vap->va_mtime = mtime;
1308 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
1309 if (v3) {
1310 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1311 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1312 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1313 fxdr_hyper(&fp->fa3_size, &vap->va_size);
1314 vap->va_blocksize = NFS_FABLKSIZE;
1315 fxdr_hyper(&fp->fa3_used, &vap->va_bytes);
1316 vap->va_fileid = fxdr_unsigned(int32_t,
1317 fp->fa3_fileid.nfsuquad[1]);
1318 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
1319 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
1320 vap->va_flags = 0;
1321 vap->va_filerev = 0;
1322 } else {
1323 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1324 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1325 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1326 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
1327 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
1328 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks)
1329 * NFS_FABLKSIZE;
1330 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
1331 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
1332 vap->va_flags = 0;
1333 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
1334 fp->fa2_ctime.nfsv2_sec);
1335 vap->va_ctime.tv_nsec = 0;
1336 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
1337 vap->va_filerev = 0;
1338 }
1339 if (vap->va_size != np->n_size) {
1340 if (vap->va_type == VREG) {
1341 if (np->n_flag & NMODIFIED) {
1342 if (vap->va_size < np->n_size)
1343 vap->va_size = np->n_size;
1344 else
1345 np->n_size = vap->va_size;
1346 } else
1347 np->n_size = vap->va_size;
1348 vnode_pager_setsize(vp, (u_long)np->n_size);
1349 } else
1350 np->n_size = vap->va_size;
1351 }
1352 np->n_attrstamp = time_second;
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>
1367static int nfs_acdebug;
1368SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
1369#endif
1370
1371/*
1372 * Check the time stamp
1373 * If the cache is valid, copy contents to *vap and return 0
1374 * otherwise return an error
1375 */
1376int
1377nfs_getattrcache(vp, vaper)
1378 register struct vnode *vp;
1379 struct vattr *vaper;
1380{
1381 register struct nfsnode *np;
1382 register struct vattr *vap;
1383 struct nfsmount *nmp;
1384 int timeo;
1385
1386 np = VTONFS(vp);
1387 vap = &np->n_vattr;
1388 nmp = VFSTONFS(vp->v_mount);
1389 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
1390 timeo = (time_second - np->n_mtime) / 10;
1391
1392#ifdef NFS_ACDEBUG
1393 if (nfs_acdebug>1)
1394 printf("nfs_getattrcache: initial timeo = %d\n", timeo);
1395#endif
1396
1397 if (vap->va_type == VDIR) {
1398 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
1399 timeo = nmp->nm_acdirmin;
1400 else if (timeo > nmp->nm_acdirmax)
1401 timeo = nmp->nm_acdirmax;
1402 } else {
1403 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
1404 timeo = nmp->nm_acregmin;
1405 else if (timeo > nmp->nm_acregmax)
1406 timeo = nmp->nm_acregmax;
1407 }
1408
1409#ifdef NFS_ACDEBUG
1410 if (nfs_acdebug > 2)
1411 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
1412 nmp->nm_acregmin, nmp->nm_acregmax,
1413 nmp->nm_acdirmin, nmp->nm_acdirmax);
1414
1415 if (nfs_acdebug)
| 38 */
39
40/*
41 * These functions support the macros and help fiddle mbuf chains for
42 * the nfs op functions. They do things like create the rpc header and
43 * copy data between mbuf chains and uio lists.
44 */
45#include <sys/param.h>
46#include <sys/buf.h>
47#include <sys/proc.h>
48#include <sys/systm.h>
49#include <sys/kernel.h>
50#include <sys/mount.h>
51#include <sys/vnode.h>
52#include <sys/namei.h>
53#include <sys/mbuf.h>
54#include <sys/socket.h>
55#include <sys/stat.h>
56#include <sys/malloc.h>
57#include <sys/sysent.h>
58#include <sys/syscall.h>
59
60#include <vm/vm.h>
61#include <vm/vm_object.h>
62#include <vm/vm_extern.h>
63#include <vm/vm_zone.h>
64
65#include <nfs/rpcv2.h>
66#include <nfs/nfsproto.h>
67#include <nfs/nfs.h>
68#include <nfs/nfsnode.h>
69#include <nfs/xdr_subs.h>
70#include <nfs/nfsm_subs.h>
71#include <nfs/nfsmount.h>
72#include <nfs/nqnfs.h>
73#include <nfs/nfsrtt.h>
74
75#include <miscfs/specfs/specdev.h>
76
77#include <netinet/in.h>
78#ifdef ISO
79#include <netiso/iso.h>
80#endif
81
82/*
83 * Data items converted to xdr at startup, since they are constant
84 * This is kinda hokey, but may save a little time doing byte swaps
85 */
86u_int32_t nfs_xdrneg1;
87u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
88 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted,
89 rpc_auth_kerb;
90u_int32_t nfs_prog, nqnfs_prog, nfs_true, nfs_false;
91
92/* And other global data */
93static u_int32_t nfs_xid = 0;
94static enum vtype nv2tov_type[8]= {
95 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
96};
97enum vtype nv3tov_type[8]= {
98 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO
99};
100
101int nfs_mount_type;
102int nfs_ticks;
103
104struct nfs_reqq nfs_reqq;
105struct nfssvc_sockhead nfssvc_sockhead;
106int nfssvc_sockhead_flag;
107struct nfsd_head nfsd_head;
108int nfsd_head_flag;
109struct nfs_bufq nfs_bufq;
110struct nqtimerhead nqtimerhead;
111struct nqfhhashhead *nqfhhashtbl;
112u_long nqfhhash;
113
114#ifndef NFS_NOSERVER
115/*
116 * Mapping of old NFS Version 2 RPC numbers to generic numbers.
117 */
118int nfsv3_procid[NFS_NPROCS] = {
119 NFSPROC_NULL,
120 NFSPROC_GETATTR,
121 NFSPROC_SETATTR,
122 NFSPROC_NOOP,
123 NFSPROC_LOOKUP,
124 NFSPROC_READLINK,
125 NFSPROC_READ,
126 NFSPROC_NOOP,
127 NFSPROC_WRITE,
128 NFSPROC_CREATE,
129 NFSPROC_REMOVE,
130 NFSPROC_RENAME,
131 NFSPROC_LINK,
132 NFSPROC_SYMLINK,
133 NFSPROC_MKDIR,
134 NFSPROC_RMDIR,
135 NFSPROC_READDIR,
136 NFSPROC_FSSTAT,
137 NFSPROC_NOOP,
138 NFSPROC_NOOP,
139 NFSPROC_NOOP,
140 NFSPROC_NOOP,
141 NFSPROC_NOOP,
142 NFSPROC_NOOP,
143 NFSPROC_NOOP,
144 NFSPROC_NOOP
145};
146
147#endif /* NFS_NOSERVER */
148/*
149 * and the reverse mapping from generic to Version 2 procedure numbers
150 */
151int nfsv2_procid[NFS_NPROCS] = {
152 NFSV2PROC_NULL,
153 NFSV2PROC_GETATTR,
154 NFSV2PROC_SETATTR,
155 NFSV2PROC_LOOKUP,
156 NFSV2PROC_NOOP,
157 NFSV2PROC_READLINK,
158 NFSV2PROC_READ,
159 NFSV2PROC_WRITE,
160 NFSV2PROC_CREATE,
161 NFSV2PROC_MKDIR,
162 NFSV2PROC_SYMLINK,
163 NFSV2PROC_CREATE,
164 NFSV2PROC_REMOVE,
165 NFSV2PROC_RMDIR,
166 NFSV2PROC_RENAME,
167 NFSV2PROC_LINK,
168 NFSV2PROC_READDIR,
169 NFSV2PROC_NOOP,
170 NFSV2PROC_STATFS,
171 NFSV2PROC_NOOP,
172 NFSV2PROC_NOOP,
173 NFSV2PROC_NOOP,
174 NFSV2PROC_NOOP,
175 NFSV2PROC_NOOP,
176 NFSV2PROC_NOOP,
177 NFSV2PROC_NOOP,
178};
179
180#ifndef NFS_NOSERVER
181/*
182 * Maps errno values to nfs error numbers.
183 * Use NFSERR_IO as the catch all for ones not specifically defined in
184 * RFC 1094.
185 */
186static u_char nfsrv_v2errmap[ELAST] = {
187 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO,
188 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
189 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO,
190 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR,
191 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
192 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS,
193 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
194 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
195 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO,
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_NAMETOL, NFSERR_IO, NFSERR_IO,
200 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE,
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 /* << Last is 83 */
204};
205
206/*
207 * Maps errno values to nfs error numbers.
208 * Although it is not obvious whether or not NFS clients really care if
209 * a returned error value is in the specified list for the procedure, the
210 * safest thing to do is filter them appropriately. For Version 2, the
211 * X/Open XNFS document is the only specification that defines error values
212 * for each RPC (The RFC simply lists all possible error values for all RPCs),
213 * so I have decided to not do this for Version 2.
214 * The first entry is the default error return and the rest are the valid
215 * errors for that RPC in increasing numeric order.
216 */
217static short nfsv3err_null[] = {
218 0,
219 0,
220};
221
222static short nfsv3err_getattr[] = {
223 NFSERR_IO,
224 NFSERR_IO,
225 NFSERR_STALE,
226 NFSERR_BADHANDLE,
227 NFSERR_SERVERFAULT,
228 0,
229};
230
231static short nfsv3err_setattr[] = {
232 NFSERR_IO,
233 NFSERR_PERM,
234 NFSERR_IO,
235 NFSERR_ACCES,
236 NFSERR_INVAL,
237 NFSERR_NOSPC,
238 NFSERR_ROFS,
239 NFSERR_DQUOT,
240 NFSERR_STALE,
241 NFSERR_BADHANDLE,
242 NFSERR_NOT_SYNC,
243 NFSERR_SERVERFAULT,
244 0,
245};
246
247static short nfsv3err_lookup[] = {
248 NFSERR_IO,
249 NFSERR_NOENT,
250 NFSERR_IO,
251 NFSERR_ACCES,
252 NFSERR_NOTDIR,
253 NFSERR_NAMETOL,
254 NFSERR_STALE,
255 NFSERR_BADHANDLE,
256 NFSERR_SERVERFAULT,
257 0,
258};
259
260static short nfsv3err_access[] = {
261 NFSERR_IO,
262 NFSERR_IO,
263 NFSERR_STALE,
264 NFSERR_BADHANDLE,
265 NFSERR_SERVERFAULT,
266 0,
267};
268
269static short nfsv3err_readlink[] = {
270 NFSERR_IO,
271 NFSERR_IO,
272 NFSERR_ACCES,
273 NFSERR_INVAL,
274 NFSERR_STALE,
275 NFSERR_BADHANDLE,
276 NFSERR_NOTSUPP,
277 NFSERR_SERVERFAULT,
278 0,
279};
280
281static short nfsv3err_read[] = {
282 NFSERR_IO,
283 NFSERR_IO,
284 NFSERR_NXIO,
285 NFSERR_ACCES,
286 NFSERR_INVAL,
287 NFSERR_STALE,
288 NFSERR_BADHANDLE,
289 NFSERR_SERVERFAULT,
290 0,
291};
292
293static short nfsv3err_write[] = {
294 NFSERR_IO,
295 NFSERR_IO,
296 NFSERR_ACCES,
297 NFSERR_INVAL,
298 NFSERR_FBIG,
299 NFSERR_NOSPC,
300 NFSERR_ROFS,
301 NFSERR_DQUOT,
302 NFSERR_STALE,
303 NFSERR_BADHANDLE,
304 NFSERR_SERVERFAULT,
305 0,
306};
307
308static short nfsv3err_create[] = {
309 NFSERR_IO,
310 NFSERR_IO,
311 NFSERR_ACCES,
312 NFSERR_EXIST,
313 NFSERR_NOTDIR,
314 NFSERR_NOSPC,
315 NFSERR_ROFS,
316 NFSERR_NAMETOL,
317 NFSERR_DQUOT,
318 NFSERR_STALE,
319 NFSERR_BADHANDLE,
320 NFSERR_NOTSUPP,
321 NFSERR_SERVERFAULT,
322 0,
323};
324
325static short nfsv3err_mkdir[] = {
326 NFSERR_IO,
327 NFSERR_IO,
328 NFSERR_ACCES,
329 NFSERR_EXIST,
330 NFSERR_NOTDIR,
331 NFSERR_NOSPC,
332 NFSERR_ROFS,
333 NFSERR_NAMETOL,
334 NFSERR_DQUOT,
335 NFSERR_STALE,
336 NFSERR_BADHANDLE,
337 NFSERR_NOTSUPP,
338 NFSERR_SERVERFAULT,
339 0,
340};
341
342static short nfsv3err_symlink[] = {
343 NFSERR_IO,
344 NFSERR_IO,
345 NFSERR_ACCES,
346 NFSERR_EXIST,
347 NFSERR_NOTDIR,
348 NFSERR_NOSPC,
349 NFSERR_ROFS,
350 NFSERR_NAMETOL,
351 NFSERR_DQUOT,
352 NFSERR_STALE,
353 NFSERR_BADHANDLE,
354 NFSERR_NOTSUPP,
355 NFSERR_SERVERFAULT,
356 0,
357};
358
359static short nfsv3err_mknod[] = {
360 NFSERR_IO,
361 NFSERR_IO,
362 NFSERR_ACCES,
363 NFSERR_EXIST,
364 NFSERR_NOTDIR,
365 NFSERR_NOSPC,
366 NFSERR_ROFS,
367 NFSERR_NAMETOL,
368 NFSERR_DQUOT,
369 NFSERR_STALE,
370 NFSERR_BADHANDLE,
371 NFSERR_NOTSUPP,
372 NFSERR_SERVERFAULT,
373 NFSERR_BADTYPE,
374 0,
375};
376
377static short nfsv3err_remove[] = {
378 NFSERR_IO,
379 NFSERR_NOENT,
380 NFSERR_IO,
381 NFSERR_ACCES,
382 NFSERR_NOTDIR,
383 NFSERR_ROFS,
384 NFSERR_NAMETOL,
385 NFSERR_STALE,
386 NFSERR_BADHANDLE,
387 NFSERR_SERVERFAULT,
388 0,
389};
390
391static short nfsv3err_rmdir[] = {
392 NFSERR_IO,
393 NFSERR_NOENT,
394 NFSERR_IO,
395 NFSERR_ACCES,
396 NFSERR_EXIST,
397 NFSERR_NOTDIR,
398 NFSERR_INVAL,
399 NFSERR_ROFS,
400 NFSERR_NAMETOL,
401 NFSERR_NOTEMPTY,
402 NFSERR_STALE,
403 NFSERR_BADHANDLE,
404 NFSERR_NOTSUPP,
405 NFSERR_SERVERFAULT,
406 0,
407};
408
409static short nfsv3err_rename[] = {
410 NFSERR_IO,
411 NFSERR_NOENT,
412 NFSERR_IO,
413 NFSERR_ACCES,
414 NFSERR_EXIST,
415 NFSERR_XDEV,
416 NFSERR_NOTDIR,
417 NFSERR_ISDIR,
418 NFSERR_INVAL,
419 NFSERR_NOSPC,
420 NFSERR_ROFS,
421 NFSERR_MLINK,
422 NFSERR_NAMETOL,
423 NFSERR_NOTEMPTY,
424 NFSERR_DQUOT,
425 NFSERR_STALE,
426 NFSERR_BADHANDLE,
427 NFSERR_NOTSUPP,
428 NFSERR_SERVERFAULT,
429 0,
430};
431
432static short nfsv3err_link[] = {
433 NFSERR_IO,
434 NFSERR_IO,
435 NFSERR_ACCES,
436 NFSERR_EXIST,
437 NFSERR_XDEV,
438 NFSERR_NOTDIR,
439 NFSERR_INVAL,
440 NFSERR_NOSPC,
441 NFSERR_ROFS,
442 NFSERR_MLINK,
443 NFSERR_NAMETOL,
444 NFSERR_DQUOT,
445 NFSERR_STALE,
446 NFSERR_BADHANDLE,
447 NFSERR_NOTSUPP,
448 NFSERR_SERVERFAULT,
449 0,
450};
451
452static short nfsv3err_readdir[] = {
453 NFSERR_IO,
454 NFSERR_IO,
455 NFSERR_ACCES,
456 NFSERR_NOTDIR,
457 NFSERR_STALE,
458 NFSERR_BADHANDLE,
459 NFSERR_BAD_COOKIE,
460 NFSERR_TOOSMALL,
461 NFSERR_SERVERFAULT,
462 0,
463};
464
465static short nfsv3err_readdirplus[] = {
466 NFSERR_IO,
467 NFSERR_IO,
468 NFSERR_ACCES,
469 NFSERR_NOTDIR,
470 NFSERR_STALE,
471 NFSERR_BADHANDLE,
472 NFSERR_BAD_COOKIE,
473 NFSERR_NOTSUPP,
474 NFSERR_TOOSMALL,
475 NFSERR_SERVERFAULT,
476 0,
477};
478
479static short nfsv3err_fsstat[] = {
480 NFSERR_IO,
481 NFSERR_IO,
482 NFSERR_STALE,
483 NFSERR_BADHANDLE,
484 NFSERR_SERVERFAULT,
485 0,
486};
487
488static short nfsv3err_fsinfo[] = {
489 NFSERR_STALE,
490 NFSERR_STALE,
491 NFSERR_BADHANDLE,
492 NFSERR_SERVERFAULT,
493 0,
494};
495
496static short nfsv3err_pathconf[] = {
497 NFSERR_STALE,
498 NFSERR_STALE,
499 NFSERR_BADHANDLE,
500 NFSERR_SERVERFAULT,
501 0,
502};
503
504static short nfsv3err_commit[] = {
505 NFSERR_IO,
506 NFSERR_IO,
507 NFSERR_STALE,
508 NFSERR_BADHANDLE,
509 NFSERR_SERVERFAULT,
510 0,
511};
512
513static short *nfsrv_v3errmap[] = {
514 nfsv3err_null,
515 nfsv3err_getattr,
516 nfsv3err_setattr,
517 nfsv3err_lookup,
518 nfsv3err_access,
519 nfsv3err_readlink,
520 nfsv3err_read,
521 nfsv3err_write,
522 nfsv3err_create,
523 nfsv3err_mkdir,
524 nfsv3err_symlink,
525 nfsv3err_mknod,
526 nfsv3err_remove,
527 nfsv3err_rmdir,
528 nfsv3err_rename,
529 nfsv3err_link,
530 nfsv3err_readdir,
531 nfsv3err_readdirplus,
532 nfsv3err_fsstat,
533 nfsv3err_fsinfo,
534 nfsv3err_pathconf,
535 nfsv3err_commit,
536};
537
538#endif /* NFS_NOSERVER */
539
540extern struct nfsrtt nfsrtt;
541extern time_t nqnfsstarttime;
542extern int nqsrv_clockskew;
543extern int nqsrv_writeslack;
544extern int nqsrv_maxlease;
545extern struct nfsstats nfsstats;
546extern int nqnfs_piggy[NFS_NPROCS];
547extern nfstype nfsv2_type[9];
548extern nfstype nfsv3_type[9];
549extern struct nfsnodehashhead *nfsnodehashtbl;
550extern u_long nfsnodehash;
551
552struct getfh_args;
553extern int getfh(struct proc *, struct getfh_args *, int *);
554struct nfssvc_args;
555extern int nfssvc(struct proc *, struct nfssvc_args *, int *);
556
557LIST_HEAD(nfsnodehashhead, nfsnode);
558
559int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *));
560
561u_quad_t
562nfs_curusec()
563{
564 struct timeval tv;
565
566 getmicrotime(&tv);
567 return ((u_quad_t)tv.tv_sec * 1000000 + (u_quad_t)tv.tv_usec);
568}
569
570/*
571 * Create the header for an rpc request packet
572 * The hsiz is the size of the rest of the nfs request header.
573 * (just used to decide if a cluster is a good idea)
574 */
575struct mbuf *
576nfsm_reqh(vp, procid, hsiz, bposp)
577 struct vnode *vp;
578 u_long procid;
579 int hsiz;
580 caddr_t *bposp;
581{
582 register struct mbuf *mb;
583 register u_int32_t *tl;
584 register caddr_t bpos;
585 struct mbuf *mb2;
586 struct nfsmount *nmp;
587 int nqflag;
588
589 MGET(mb, M_WAIT, MT_DATA);
590 if (hsiz >= MINCLSIZE)
591 MCLGET(mb, M_WAIT);
592 mb->m_len = 0;
593 bpos = mtod(mb, caddr_t);
594
595 /*
596 * For NQNFS, add lease request.
597 */
598 if (vp) {
599 nmp = VFSTONFS(vp->v_mount);
600 if (nmp->nm_flag & NFSMNT_NQNFS) {
601 nqflag = NQNFS_NEEDLEASE(vp, procid);
602 if (nqflag) {
603 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED);
604 *tl++ = txdr_unsigned(nqflag);
605 *tl = txdr_unsigned(nmp->nm_leaseterm);
606 } else {
607 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
608 *tl = 0;
609 }
610 }
611 }
612 /* Finally, return values */
613 *bposp = bpos;
614 return (mb);
615}
616
617/*
618 * Build the RPC header and fill in the authorization info.
619 * The authorization string argument is only used when the credentials
620 * come from outside of the kernel.
621 * Returns the head of the mbuf list.
622 */
623struct mbuf *
624nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len,
625 verf_str, mrest, mrest_len, mbp, xidp)
626 register struct ucred *cr;
627 int nmflag;
628 int procid;
629 int auth_type;
630 int auth_len;
631 char *auth_str;
632 int verf_len;
633 char *verf_str;
634 struct mbuf *mrest;
635 int mrest_len;
636 struct mbuf **mbp;
637 u_int32_t *xidp;
638{
639 register struct mbuf *mb;
640 register u_int32_t *tl;
641 register caddr_t bpos;
642 register int i;
643 struct mbuf *mreq, *mb2;
644 int siz, grpsiz, authsiz;
645 static u_int32_t base;
646
647 authsiz = nfsm_rndup(auth_len);
648 MGETHDR(mb, M_WAIT, MT_DATA);
649 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
650 MCLGET(mb, M_WAIT);
651 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
652 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
653 } else {
654 MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
655 }
656 mb->m_len = 0;
657 mreq = mb;
658 bpos = mtod(mb, caddr_t);
659
660 /*
661 * First the RPC header.
662 */
663 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
664
665 /* Get a pretty random xid to start with */
666 if (!nfs_xid)
667 nfs_xid = random();
668 /*
669 * Skip zero xid if it should ever happen.
670 */
671 if (++nfs_xid == 0)
672 nfs_xid++;
673
674 *tl++ = *xidp = txdr_unsigned(nfs_xid);
675 *tl++ = rpc_call;
676 *tl++ = rpc_vers;
677 if (nmflag & NFSMNT_NQNFS) {
678 *tl++ = txdr_unsigned(NQNFS_PROG);
679 *tl++ = txdr_unsigned(NQNFS_VER3);
680 } else {
681 *tl++ = txdr_unsigned(NFS_PROG);
682 if (nmflag & NFSMNT_NFSV3)
683 *tl++ = txdr_unsigned(NFS_VER3);
684 else
685 *tl++ = txdr_unsigned(NFS_VER2);
686 }
687 if (nmflag & NFSMNT_NFSV3)
688 *tl++ = txdr_unsigned(procid);
689 else
690 *tl++ = txdr_unsigned(nfsv2_procid[procid]);
691
692 /*
693 * And then the authorization cred.
694 */
695 *tl++ = txdr_unsigned(auth_type);
696 *tl = txdr_unsigned(authsiz);
697 switch (auth_type) {
698 case RPCAUTH_UNIX:
699 nfsm_build(tl, u_int32_t *, auth_len);
700 *tl++ = 0; /* stamp ?? */
701 *tl++ = 0; /* NULL hostname */
702 *tl++ = txdr_unsigned(cr->cr_uid);
703 *tl++ = txdr_unsigned(cr->cr_groups[0]);
704 grpsiz = (auth_len >> 2) - 5;
705 *tl++ = txdr_unsigned(grpsiz);
706 for (i = 1; i <= grpsiz; i++)
707 *tl++ = txdr_unsigned(cr->cr_groups[i]);
708 break;
709 case RPCAUTH_KERB4:
710 siz = auth_len;
711 while (siz > 0) {
712 if (M_TRAILINGSPACE(mb) == 0) {
713 MGET(mb2, M_WAIT, MT_DATA);
714 if (siz >= MINCLSIZE)
715 MCLGET(mb2, M_WAIT);
716 mb->m_next = mb2;
717 mb = mb2;
718 mb->m_len = 0;
719 bpos = mtod(mb, caddr_t);
720 }
721 i = min(siz, M_TRAILINGSPACE(mb));
722 bcopy(auth_str, bpos, i);
723 mb->m_len += i;
724 auth_str += i;
725 bpos += i;
726 siz -= i;
727 }
728 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) {
729 for (i = 0; i < siz; i++)
730 *bpos++ = '\0';
731 mb->m_len += siz;
732 }
733 break;
734 };
735
736 /*
737 * And the verifier...
738 */
739 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
740 if (verf_str) {
741 *tl++ = txdr_unsigned(RPCAUTH_KERB4);
742 *tl = txdr_unsigned(verf_len);
743 siz = verf_len;
744 while (siz > 0) {
745 if (M_TRAILINGSPACE(mb) == 0) {
746 MGET(mb2, M_WAIT, MT_DATA);
747 if (siz >= MINCLSIZE)
748 MCLGET(mb2, M_WAIT);
749 mb->m_next = mb2;
750 mb = mb2;
751 mb->m_len = 0;
752 bpos = mtod(mb, caddr_t);
753 }
754 i = min(siz, M_TRAILINGSPACE(mb));
755 bcopy(verf_str, bpos, i);
756 mb->m_len += i;
757 verf_str += i;
758 bpos += i;
759 siz -= i;
760 }
761 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) {
762 for (i = 0; i < siz; i++)
763 *bpos++ = '\0';
764 mb->m_len += siz;
765 }
766 } else {
767 *tl++ = txdr_unsigned(RPCAUTH_NULL);
768 *tl = 0;
769 }
770 mb->m_next = mrest;
771 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
772 mreq->m_pkthdr.rcvif = (struct ifnet *)0;
773 *mbp = mb;
774 return (mreq);
775}
776
777/*
778 * copies mbuf chain to the uio scatter/gather list
779 */
780int
781nfsm_mbuftouio(mrep, uiop, siz, dpos)
782 struct mbuf **mrep;
783 register struct uio *uiop;
784 int siz;
785 caddr_t *dpos;
786{
787 register char *mbufcp, *uiocp;
788 register int xfer, left, len;
789 register struct mbuf *mp;
790 long uiosiz, rem;
791 int error = 0;
792
793 mp = *mrep;
794 mbufcp = *dpos;
795 len = mtod(mp, caddr_t)+mp->m_len-mbufcp;
796 rem = nfsm_rndup(siz)-siz;
797 while (siz > 0) {
798 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL)
799 return (EFBIG);
800 left = uiop->uio_iov->iov_len;
801 uiocp = uiop->uio_iov->iov_base;
802 if (left > siz)
803 left = siz;
804 uiosiz = left;
805 while (left > 0) {
806 while (len == 0) {
807 mp = mp->m_next;
808 if (mp == NULL)
809 return (EBADRPC);
810 mbufcp = mtod(mp, caddr_t);
811 len = mp->m_len;
812 }
813 xfer = (left > len) ? len : left;
814#ifdef notdef
815 /* Not Yet.. */
816 if (uiop->uio_iov->iov_op != NULL)
817 (*(uiop->uio_iov->iov_op))
818 (mbufcp, uiocp, xfer);
819 else
820#endif
821 if (uiop->uio_segflg == UIO_SYSSPACE)
822 bcopy(mbufcp, uiocp, xfer);
823 else
824 copyout(mbufcp, uiocp, xfer);
825 left -= xfer;
826 len -= xfer;
827 mbufcp += xfer;
828 uiocp += xfer;
829 uiop->uio_offset += xfer;
830 uiop->uio_resid -= xfer;
831 }
832 if (uiop->uio_iov->iov_len <= siz) {
833 uiop->uio_iovcnt--;
834 uiop->uio_iov++;
835 } else {
836 uiop->uio_iov->iov_base += uiosiz;
837 uiop->uio_iov->iov_len -= uiosiz;
838 }
839 siz -= uiosiz;
840 }
841 *dpos = mbufcp;
842 *mrep = mp;
843 if (rem > 0) {
844 if (len < rem)
845 error = nfs_adv(mrep, dpos, rem, len);
846 else
847 *dpos += rem;
848 }
849 return (error);
850}
851
852/*
853 * copies a uio scatter/gather list to an mbuf chain.
854 * NOTE: can ony handle iovcnt == 1
855 */
856int
857nfsm_uiotombuf(uiop, mq, siz, bpos)
858 register struct uio *uiop;
859 struct mbuf **mq;
860 int siz;
861 caddr_t *bpos;
862{
863 register char *uiocp;
864 register struct mbuf *mp, *mp2;
865 register int xfer, left, mlen;
866 int uiosiz, clflg, rem;
867 char *cp;
868
869#ifdef DIAGNOSTIC
870 if (uiop->uio_iovcnt != 1)
871 panic("nfsm_uiotombuf: iovcnt != 1");
872#endif
873
874 if (siz > MLEN) /* or should it >= MCLBYTES ?? */
875 clflg = 1;
876 else
877 clflg = 0;
878 rem = nfsm_rndup(siz)-siz;
879 mp = mp2 = *mq;
880 while (siz > 0) {
881 left = uiop->uio_iov->iov_len;
882 uiocp = uiop->uio_iov->iov_base;
883 if (left > siz)
884 left = siz;
885 uiosiz = left;
886 while (left > 0) {
887 mlen = M_TRAILINGSPACE(mp);
888 if (mlen == 0) {
889 MGET(mp, M_WAIT, MT_DATA);
890 if (clflg)
891 MCLGET(mp, M_WAIT);
892 mp->m_len = 0;
893 mp2->m_next = mp;
894 mp2 = mp;
895 mlen = M_TRAILINGSPACE(mp);
896 }
897 xfer = (left > mlen) ? mlen : left;
898#ifdef notdef
899 /* Not Yet.. */
900 if (uiop->uio_iov->iov_op != NULL)
901 (*(uiop->uio_iov->iov_op))
902 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
903 else
904#endif
905 if (uiop->uio_segflg == UIO_SYSSPACE)
906 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
907 else
908 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
909 mp->m_len += xfer;
910 left -= xfer;
911 uiocp += xfer;
912 uiop->uio_offset += xfer;
913 uiop->uio_resid -= xfer;
914 }
915 uiop->uio_iov->iov_base += uiosiz;
916 uiop->uio_iov->iov_len -= uiosiz;
917 siz -= uiosiz;
918 }
919 if (rem > 0) {
920 if (rem > M_TRAILINGSPACE(mp)) {
921 MGET(mp, M_WAIT, MT_DATA);
922 mp->m_len = 0;
923 mp2->m_next = mp;
924 }
925 cp = mtod(mp, caddr_t)+mp->m_len;
926 for (left = 0; left < rem; left++)
927 *cp++ = '\0';
928 mp->m_len += rem;
929 *bpos = cp;
930 } else
931 *bpos = mtod(mp, caddr_t)+mp->m_len;
932 *mq = mp;
933 return (0);
934}
935
936/*
937 * Help break down an mbuf chain by setting the first siz bytes contiguous
938 * pointed to by returned val.
939 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough
940 * cases. (The macros use the vars. dpos and dpos2)
941 */
942int
943nfsm_disct(mdp, dposp, siz, left, cp2)
944 struct mbuf **mdp;
945 caddr_t *dposp;
946 int siz;
947 int left;
948 caddr_t *cp2;
949{
950 register struct mbuf *mp, *mp2;
951 register int siz2, xfer;
952 register caddr_t p;
953
954 mp = *mdp;
955 while (left == 0) {
956 *mdp = mp = mp->m_next;
957 if (mp == NULL)
958 return (EBADRPC);
959 left = mp->m_len;
960 *dposp = mtod(mp, caddr_t);
961 }
962 if (left >= siz) {
963 *cp2 = *dposp;
964 *dposp += siz;
965 } else if (mp->m_next == NULL) {
966 return (EBADRPC);
967 } else if (siz > MHLEN) {
968 panic("nfs S too big");
969 } else {
970 MGET(mp2, M_WAIT, MT_DATA);
971 mp2->m_next = mp->m_next;
972 mp->m_next = mp2;
973 mp->m_len -= left;
974 mp = mp2;
975 *cp2 = p = mtod(mp, caddr_t);
976 bcopy(*dposp, p, left); /* Copy what was left */
977 siz2 = siz-left;
978 p += left;
979 mp2 = mp->m_next;
980 /* Loop around copying up the siz2 bytes */
981 while (siz2 > 0) {
982 if (mp2 == NULL)
983 return (EBADRPC);
984 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2;
985 if (xfer > 0) {
986 bcopy(mtod(mp2, caddr_t), p, xfer);
987 NFSMADV(mp2, xfer);
988 mp2->m_len -= xfer;
989 p += xfer;
990 siz2 -= xfer;
991 }
992 if (siz2 > 0)
993 mp2 = mp2->m_next;
994 }
995 mp->m_len = siz;
996 *mdp = mp2;
997 *dposp = mtod(mp2, caddr_t);
998 }
999 return (0);
1000}
1001
1002/*
1003 * Advance the position in the mbuf chain.
1004 */
1005int
1006nfs_adv(mdp, dposp, offs, left)
1007 struct mbuf **mdp;
1008 caddr_t *dposp;
1009 int offs;
1010 int left;
1011{
1012 register struct mbuf *m;
1013 register int s;
1014
1015 m = *mdp;
1016 s = left;
1017 while (s < offs) {
1018 offs -= s;
1019 m = m->m_next;
1020 if (m == NULL)
1021 return (EBADRPC);
1022 s = m->m_len;
1023 }
1024 *mdp = m;
1025 *dposp = mtod(m, caddr_t)+offs;
1026 return (0);
1027}
1028
1029/*
1030 * Copy a string into mbufs for the hard cases...
1031 */
1032int
1033nfsm_strtmbuf(mb, bpos, cp, siz)
1034 struct mbuf **mb;
1035 char **bpos;
1036 const char *cp;
1037 long siz;
1038{
1039 register struct mbuf *m1 = NULL, *m2;
1040 long left, xfer, len, tlen;
1041 u_int32_t *tl;
1042 int putsize;
1043
1044 putsize = 1;
1045 m2 = *mb;
1046 left = M_TRAILINGSPACE(m2);
1047 if (left > 0) {
1048 tl = ((u_int32_t *)(*bpos));
1049 *tl++ = txdr_unsigned(siz);
1050 putsize = 0;
1051 left -= NFSX_UNSIGNED;
1052 m2->m_len += NFSX_UNSIGNED;
1053 if (left > 0) {
1054 bcopy(cp, (caddr_t) tl, left);
1055 siz -= left;
1056 cp += left;
1057 m2->m_len += left;
1058 left = 0;
1059 }
1060 }
1061 /* Loop around adding mbufs */
1062 while (siz > 0) {
1063 MGET(m1, M_WAIT, MT_DATA);
1064 if (siz > MLEN)
1065 MCLGET(m1, M_WAIT);
1066 m1->m_len = NFSMSIZ(m1);
1067 m2->m_next = m1;
1068 m2 = m1;
1069 tl = mtod(m1, u_int32_t *);
1070 tlen = 0;
1071 if (putsize) {
1072 *tl++ = txdr_unsigned(siz);
1073 m1->m_len -= NFSX_UNSIGNED;
1074 tlen = NFSX_UNSIGNED;
1075 putsize = 0;
1076 }
1077 if (siz < m1->m_len) {
1078 len = nfsm_rndup(siz);
1079 xfer = siz;
1080 if (xfer < len)
1081 *(tl+(xfer>>2)) = 0;
1082 } else {
1083 xfer = len = m1->m_len;
1084 }
1085 bcopy(cp, (caddr_t) tl, xfer);
1086 m1->m_len = len+tlen;
1087 siz -= xfer;
1088 cp += xfer;
1089 }
1090 *mb = m1;
1091 *bpos = mtod(m1, caddr_t)+m1->m_len;
1092 return (0);
1093}
1094
1095/*
1096 * Called once to initialize data structures...
1097 */
1098int
1099nfs_init(vfsp)
1100 struct vfsconf *vfsp;
1101{
1102 register int i;
1103
1104 nfsmount_zone = zinit("NFSMOUNT", sizeof(struct nfsmount), 0, 0, 1);
1105
1106 /*
1107 * Check to see if major data structures haven't bloated.
1108 */
1109 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) {
1110 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC);
1111 printf("Try reducing NFS_UIDHASHSIZ\n");
1112 }
1113 if (sizeof (struct nfsuid) > NFS_UIDALLOC) {
1114 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC);
1115 printf("Try unionizing the nu_nickname and nu_flag fields\n");
1116 }
1117 nfs_mount_type = vfsp->vfc_typenum;
1118 nfsrtt.pos = 0;
1119 rpc_vers = txdr_unsigned(RPC_VER2);
1120 rpc_call = txdr_unsigned(RPC_CALL);
1121 rpc_reply = txdr_unsigned(RPC_REPLY);
1122 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
1123 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
1124 rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
1125 rpc_autherr = txdr_unsigned(RPC_AUTHERR);
1126 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
1127 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4);
1128 nfs_prog = txdr_unsigned(NFS_PROG);
1129 nqnfs_prog = txdr_unsigned(NQNFS_PROG);
1130 nfs_true = txdr_unsigned(TRUE);
1131 nfs_false = txdr_unsigned(FALSE);
1132 nfs_xdrneg1 = txdr_unsigned(-1);
1133 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
1134 if (nfs_ticks < 1)
1135 nfs_ticks = 1;
1136 /* Ensure async daemons disabled */
1137 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
1138 nfs_iodwant[i] = (struct proc *)0;
1139 nfs_iodmount[i] = (struct nfsmount *)0;
1140 }
1141 nfs_nhinit(); /* Init the nfsnode table */
1142#ifndef NFS_NOSERVER
1143 nfsrv_init(0); /* Init server data structures */
1144 nfsrv_initcache(); /* Init the server request cache */
1145#endif
1146
1147 /*
1148 * Initialize the nqnfs server stuff.
1149 */
1150 if (nqnfsstarttime == 0) {
1151 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease
1152 + nqsrv_clockskew + nqsrv_writeslack;
1153 NQLOADNOVRAM(nqnfsstarttime);
1154 CIRCLEQ_INIT(&nqtimerhead);
1155 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, &nqfhhash);
1156 }
1157
1158 /*
1159 * Initialize reply list and start timer
1160 */
1161 TAILQ_INIT(&nfs_reqq);
1162
1163 nfs_timer(0);
1164
1165
1166 /*
1167 * Set up lease_check and lease_updatetime so that other parts
1168 * of the system can call us, if we are loadable.
1169 */
1170#ifndef NFS_NOSERVER
1171 default_vnodeop_p[VOFFSET(vop_lease)] = (vop_t *)nqnfs_vop_lease_check;
1172#endif
1173 lease_updatetime = nfs_lease_updatetime;
1174 vfsp->vfc_refcount++; /* make us non-unloadable */
1175 sysent[SYS_nfssvc].sy_narg = 2;
1176 sysent[SYS_nfssvc].sy_call = (sy_call_t *)nfssvc;
1177#ifndef NFS_NOSERVER
1178 sysent[SYS_getfh].sy_narg = 2;
1179 sysent[SYS_getfh].sy_call = (sy_call_t *)getfh;
1180#endif
1181
1182 return (0);
1183}
1184
1185/*
1186 * Attribute cache routines.
1187 * nfs_loadattrcache() - loads or updates the cache contents from attributes
1188 * that are on the mbuf list
1189 * nfs_getattrcache() - returns valid attributes if found in cache, returns
1190 * error otherwise
1191 */
1192
1193/*
1194 * Load the attribute cache (that lives in the nfsnode entry) with
1195 * the values on the mbuf list and
1196 * Iff vap not NULL
1197 * copy the attributes to *vaper
1198 */
1199int
1200nfs_loadattrcache(vpp, mdp, dposp, vaper)
1201 struct vnode **vpp;
1202 struct mbuf **mdp;
1203 caddr_t *dposp;
1204 struct vattr *vaper;
1205{
1206 register struct vnode *vp = *vpp;
1207 register struct vattr *vap;
1208 register struct nfs_fattr *fp;
1209 register struct nfsnode *np;
1210 register int32_t t1;
1211 caddr_t cp2;
1212 int error = 0, rdev;
1213 struct mbuf *md;
1214 enum vtype vtyp;
1215 u_short vmode;
1216 struct timespec mtime;
1217 struct vnode *nvp;
1218 int v3 = NFS_ISV3(vp);
1219
1220 md = *mdp;
1221 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
1222 if (error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2))
1223 return (error);
1224 fp = (struct nfs_fattr *)cp2;
1225 if (v3) {
1226 vtyp = nfsv3tov_type(fp->fa_type);
1227 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1228 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
1229 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
1230 fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
1231 } else {
1232 vtyp = nfsv2tov_type(fp->fa_type);
1233 vmode = fxdr_unsigned(u_short, fp->fa_mode);
1234 /*
1235 * XXX
1236 *
1237 * The duplicate information returned in fa_type and fa_mode
1238 * is an ambiguity in the NFS version 2 protocol.
1239 *
1240 * VREG should be taken literally as a regular file. If a
1241 * server intents to return some type information differently
1242 * in the upper bits of the mode field (e.g. for sockets, or
1243 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
1244 * leave the examination of the mode bits even in the VREG
1245 * case to avoid breakage for bogus servers, but we make sure
1246 * that there are actually type bits set in the upper part of
1247 * fa_mode (and failing that, trust the va_type field).
1248 *
1249 * NFSv3 cleared the issue, and requires fa_mode to not
1250 * contain any type information (while also introduing sockets
1251 * and FIFOs for fa_type).
1252 */
1253 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
1254 vtyp = IFTOVT(vmode);
1255 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
1256 fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
1257
1258 /*
1259 * Really ugly NFSv2 kludge.
1260 */
1261 if (vtyp == VCHR && rdev == 0xffffffff)
1262 vtyp = VFIFO;
1263 }
1264
1265 /*
1266 * If v_type == VNON it is a new node, so fill in the v_type,
1267 * n_mtime fields. Check to see if it represents a special
1268 * device, and if so, check for a possible alias. Once the
1269 * correct vnode has been obtained, fill in the rest of the
1270 * information.
1271 */
1272 np = VTONFS(vp);
1273 if (vp->v_type != vtyp) {
1274 vp->v_type = vtyp;
1275 if (vp->v_type == VFIFO) {
1276 vp->v_op = fifo_nfsv2nodeop_p;
1277 }
1278 if (vp->v_type == VCHR || vp->v_type == VBLK) {
1279 vp->v_op = spec_nfsv2nodeop_p;
1280 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount);
1281 if (nvp) {
1282 /*
1283 * Discard unneeded vnode, but save its nfsnode.
1284 * Since the nfsnode does not have a lock, its
1285 * vnode lock has to be carried over.
1286 */
1287 nvp->v_vnlock = vp->v_vnlock;
1288 vp->v_vnlock = NULL;
1289 nvp->v_data = vp->v_data;
1290 vp->v_data = NULL;
1291 vp->v_op = spec_vnodeop_p;
1292 vrele(vp);
1293 vgone(vp);
1294 /*
1295 * Reinitialize aliased node.
1296 */
1297 np->n_vnode = nvp;
1298 *vpp = vp = nvp;
1299 }
1300 }
1301 np->n_mtime = mtime.tv_sec;
1302 }
1303 vap = &np->n_vattr;
1304 vap->va_type = vtyp;
1305 vap->va_mode = (vmode & 07777);
1306 vap->va_rdev = (dev_t)rdev;
1307 vap->va_mtime = mtime;
1308 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
1309 if (v3) {
1310 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1311 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1312 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1313 fxdr_hyper(&fp->fa3_size, &vap->va_size);
1314 vap->va_blocksize = NFS_FABLKSIZE;
1315 fxdr_hyper(&fp->fa3_used, &vap->va_bytes);
1316 vap->va_fileid = fxdr_unsigned(int32_t,
1317 fp->fa3_fileid.nfsuquad[1]);
1318 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
1319 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
1320 vap->va_flags = 0;
1321 vap->va_filerev = 0;
1322 } else {
1323 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
1324 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
1325 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
1326 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
1327 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
1328 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks)
1329 * NFS_FABLKSIZE;
1330 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
1331 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
1332 vap->va_flags = 0;
1333 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
1334 fp->fa2_ctime.nfsv2_sec);
1335 vap->va_ctime.tv_nsec = 0;
1336 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
1337 vap->va_filerev = 0;
1338 }
1339 if (vap->va_size != np->n_size) {
1340 if (vap->va_type == VREG) {
1341 if (np->n_flag & NMODIFIED) {
1342 if (vap->va_size < np->n_size)
1343 vap->va_size = np->n_size;
1344 else
1345 np->n_size = vap->va_size;
1346 } else
1347 np->n_size = vap->va_size;
1348 vnode_pager_setsize(vp, (u_long)np->n_size);
1349 } else
1350 np->n_size = vap->va_size;
1351 }
1352 np->n_attrstamp = time_second;
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>
1367static int nfs_acdebug;
1368SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
1369#endif
1370
1371/*
1372 * Check the time stamp
1373 * If the cache is valid, copy contents to *vap and return 0
1374 * otherwise return an error
1375 */
1376int
1377nfs_getattrcache(vp, vaper)
1378 register struct vnode *vp;
1379 struct vattr *vaper;
1380{
1381 register struct nfsnode *np;
1382 register struct vattr *vap;
1383 struct nfsmount *nmp;
1384 int timeo;
1385
1386 np = VTONFS(vp);
1387 vap = &np->n_vattr;
1388 nmp = VFSTONFS(vp->v_mount);
1389 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
1390 timeo = (time_second - np->n_mtime) / 10;
1391
1392#ifdef NFS_ACDEBUG
1393 if (nfs_acdebug>1)
1394 printf("nfs_getattrcache: initial timeo = %d\n", timeo);
1395#endif
1396
1397 if (vap->va_type == VDIR) {
1398 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
1399 timeo = nmp->nm_acdirmin;
1400 else if (timeo > nmp->nm_acdirmax)
1401 timeo = nmp->nm_acdirmax;
1402 } else {
1403 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
1404 timeo = nmp->nm_acregmin;
1405 else if (timeo > nmp->nm_acregmax)
1406 timeo = nmp->nm_acregmax;
1407 }
1408
1409#ifdef NFS_ACDEBUG
1410 if (nfs_acdebug > 2)
1411 printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
1412 nmp->nm_acregmin, nmp->nm_acregmax,
1413 nmp->nm_acdirmin, nmp->nm_acdirmax);
1414
1415 if (nfs_acdebug)
|
1417 (time_second - np->n_attrstamp), timeo);
1418#endif
1419
1420 if ((time_second - np->n_attrstamp) >= timeo) {
1421 nfsstats.attrcache_misses++;
1422 return (ENOENT);
1423 }
1424 nfsstats.attrcache_hits++;
1425 if (vap->va_size != np->n_size) {
1426 if (vap->va_type == VREG) {
1427 if (np->n_flag & NMODIFIED) {
1428 if (vap->va_size < np->n_size)
1429 vap->va_size = np->n_size;
1430 else
1431 np->n_size = vap->va_size;
1432 } else
1433 np->n_size = vap->va_size;
1434 vnode_pager_setsize(vp, (u_long)np->n_size);
1435 } else
1436 np->n_size = vap->va_size;
1437 }
1438 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
1439 if (np->n_flag & NCHG) {
1440 if (np->n_flag & NACC)
1441 vaper->va_atime = np->n_atim;
1442 if (np->n_flag & NUPD)
1443 vaper->va_mtime = np->n_mtim;
1444 }
1445 return (0);
1446}
1447
1448#ifndef NFS_NOSERVER
1449/*
1450 * Set up nameidata for a lookup() call and do it.
1451 *
1452 * If pubflag is set, this call is done for a lookup operation on the
1453 * public filehandle. In that case we allow crossing mountpoints and
1454 * absolute pathnames. However, the caller is expected to check that
1455 * the lookup result is within the public fs, and deny access if
1456 * it is not.
1457 */
1458int
1459nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag)
1460 register struct nameidata *ndp;
1461 fhandle_t *fhp;
1462 int len;
1463 struct nfssvc_sock *slp;
1464 struct sockaddr *nam;
1465 struct mbuf **mdp;
1466 caddr_t *dposp;
1467 struct vnode **retdirp;
1468 struct proc *p;
1469 int kerbflag, pubflag;
1470{
1471 register int i, rem;
1472 register struct mbuf *md;
1473 register char *fromcp, *tocp, *cp;
1474 struct iovec aiov;
1475 struct uio auio;
1476 struct vnode *dp;
1477 int error, rdonly, linklen;
1478 struct componentname *cnp = &ndp->ni_cnd;
1479
1480 *retdirp = (struct vnode *)0;
1481 cnp->cn_pnbuf = zalloc(namei_zone);
1482
1483 /*
1484 * Copy the name from the mbuf list to ndp->ni_pnbuf
1485 * and set the various ndp fields appropriately.
1486 */
1487 fromcp = *dposp;
1488 tocp = cnp->cn_pnbuf;
1489 md = *mdp;
1490 rem = mtod(md, caddr_t) + md->m_len - fromcp;
1491 cnp->cn_hash = 0;
1492 for (i = 0; i < len; i++) {
1493 while (rem == 0) {
1494 md = md->m_next;
1495 if (md == NULL) {
1496 error = EBADRPC;
1497 goto out;
1498 }
1499 fromcp = mtod(md, caddr_t);
1500 rem = md->m_len;
1501 }
1502 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) {
1503 error = EACCES;
1504 goto out;
1505 }
1506 cnp->cn_hash += (unsigned char)*fromcp;
1507 *tocp++ = *fromcp++;
1508 rem--;
1509 }
1510 *tocp = '\0';
1511 *mdp = md;
1512 *dposp = fromcp;
1513 len = nfsm_rndup(len)-len;
1514 if (len > 0) {
1515 if (rem >= len)
1516 *dposp += len;
1517 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0)
1518 goto out;
1519 }
1520
1521 /*
1522 * Extract and set starting directory.
1523 */
1524 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp,
1525 nam, &rdonly, kerbflag, pubflag);
1526 if (error)
1527 goto out;
1528 if (dp->v_type != VDIR) {
1529 vrele(dp);
1530 error = ENOTDIR;
1531 goto out;
1532 }
1533
1534 if (rdonly)
1535 cnp->cn_flags |= RDONLY;
1536
1537 *retdirp = dp;
1538
1539 if (pubflag) {
1540 /*
1541 * Oh joy. For WebNFS, handle those pesky '%' escapes,
1542 * and the 'native path' indicator.
1543 */
1544 cp = zalloc(namei_zone);
1545 fromcp = cnp->cn_pnbuf;
1546 tocp = cp;
1547 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) {
1548 switch ((unsigned char)*fromcp) {
1549 case WEBNFS_NATIVE_CHAR:
1550 /*
1551 * 'Native' path for us is the same
1552 * as a path according to the NFS spec,
1553 * just skip the escape char.
1554 */
1555 fromcp++;
1556 break;
1557 /*
1558 * More may be added in the future, range 0x80-0xff
1559 */
1560 default:
1561 error = EIO;
1562 zfree(namei_zone, cp);
1563 goto out;
1564 }
1565 }
1566 /*
1567 * Translate the '%' escapes, URL-style.
1568 */
1569 while (*fromcp != '\0') {
1570 if (*fromcp == WEBNFS_ESC_CHAR) {
1571 if (fromcp[1] != '\0' && fromcp[2] != '\0') {
1572 fromcp++;
1573 *tocp++ = HEXSTRTOI(fromcp);
1574 fromcp += 2;
1575 continue;
1576 } else {
1577 error = ENOENT;
1578 zfree(namei_zone, cp);
1579 goto out;
1580 }
1581 } else
1582 *tocp++ = *fromcp++;
1583 }
1584 *tocp = '\0';
1585 zfree(namei_zone, cnp->cn_pnbuf);
1586 cnp->cn_pnbuf = cp;
1587 }
1588
1589 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1;
1590 ndp->ni_segflg = UIO_SYSSPACE;
1591
1592 if (pubflag) {
1593 ndp->ni_rootdir = rootvnode;
1594 ndp->ni_loopcnt = 0;
1595 if (cnp->cn_pnbuf[0] == '/')
1596 dp = rootvnode;
1597 } else {
1598 cnp->cn_flags |= NOCROSSMOUNT;
1599 }
1600
1601 cnp->cn_proc = p;
1602 VREF(dp);
1603
1604 for (;;) {
1605 cnp->cn_nameptr = cnp->cn_pnbuf;
1606 ndp->ni_startdir = dp;
1607 /*
1608 * And call lookup() to do the real work
1609 */
1610 error = lookup(ndp);
1611 if (error)
1612 break;
1613 /*
1614 * Check for encountering a symbolic link
1615 */
1616 if ((cnp->cn_flags & ISSYMLINK) == 0) {
1617 nfsrv_object_create(ndp->ni_vp);
1618 if (cnp->cn_flags & (SAVENAME | SAVESTART)) {
1619 cnp->cn_flags |= HASBUF;
1620 return (0);
1621 }
1622 break;
1623 } else {
1624 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
1625 VOP_UNLOCK(ndp->ni_dvp, 0, p);
1626 if (!pubflag) {
1627 vrele(ndp->ni_dvp);
1628 vput(ndp->ni_vp);
1629 ndp->ni_vp = NULL;
1630 error = EINVAL;
1631 break;
1632 }
1633
1634 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
1635 error = ELOOP;
1636 break;
1637 }
1638 if (ndp->ni_pathlen > 1)
1639 cp = zalloc(namei_zone);
1640 else
1641 cp = cnp->cn_pnbuf;
1642 aiov.iov_base = cp;
1643 aiov.iov_len = MAXPATHLEN;
1644 auio.uio_iov = &aiov;
1645 auio.uio_iovcnt = 1;
1646 auio.uio_offset = 0;
1647 auio.uio_rw = UIO_READ;
1648 auio.uio_segflg = UIO_SYSSPACE;
1649 auio.uio_procp = (struct proc *)0;
1650 auio.uio_resid = MAXPATHLEN;
1651 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
1652 if (error) {
1653 badlink:
1654 if (ndp->ni_pathlen > 1)
1655 zfree(namei_zone, cp);
1656 break;
1657 }
1658 linklen = MAXPATHLEN - auio.uio_resid;
1659 if (linklen == 0) {
1660 error = ENOENT;
1661 goto badlink;
1662 }
1663 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
1664 error = ENAMETOOLONG;
1665 goto badlink;
1666 }
1667 if (ndp->ni_pathlen > 1) {
1668 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
1669 zfree(namei_zone, cnp->cn_pnbuf);
1670 cnp->cn_pnbuf = cp;
1671 } else
1672 cnp->cn_pnbuf[linklen] = '\0';
1673 ndp->ni_pathlen += linklen;
1674 vput(ndp->ni_vp);
1675 dp = ndp->ni_dvp;
1676 /*
1677 * Check if root directory should replace current directory.
1678 */
1679 if (cnp->cn_pnbuf[0] == '/') {
1680 vrele(dp);
1681 dp = ndp->ni_rootdir;
1682 VREF(dp);
1683 }
1684 }
1685 }
1686out:
1687 zfree(namei_zone, cnp->cn_pnbuf);
1688 return (error);
1689}
1690
1691/*
1692 * A fiddled version of m_adj() that ensures null fill to a long
1693 * boundary and only trims off the back end
1694 */
1695void
1696nfsm_adj(mp, len, nul)
1697 struct mbuf *mp;
1698 register int len;
1699 int nul;
1700{
1701 register struct mbuf *m;
1702 register int count, i;
1703 register char *cp;
1704
1705 /*
1706 * Trim from tail. Scan the mbuf chain,
1707 * calculating its length and finding the last mbuf.
1708 * If the adjustment only affects this mbuf, then just
1709 * adjust and return. Otherwise, rescan and truncate
1710 * after the remaining size.
1711 */
1712 count = 0;
1713 m = mp;
1714 for (;;) {
1715 count += m->m_len;
1716 if (m->m_next == (struct mbuf *)0)
1717 break;
1718 m = m->m_next;
1719 }
1720 if (m->m_len > len) {
1721 m->m_len -= len;
1722 if (nul > 0) {
1723 cp = mtod(m, caddr_t)+m->m_len-nul;
1724 for (i = 0; i < nul; i++)
1725 *cp++ = '\0';
1726 }
1727 return;
1728 }
1729 count -= len;
1730 if (count < 0)
1731 count = 0;
1732 /*
1733 * Correct length for chain is "count".
1734 * Find the mbuf with last data, adjust its length,
1735 * and toss data from remaining mbufs on chain.
1736 */
1737 for (m = mp; m; m = m->m_next) {
1738 if (m->m_len >= count) {
1739 m->m_len = count;
1740 if (nul > 0) {
1741 cp = mtod(m, caddr_t)+m->m_len-nul;
1742 for (i = 0; i < nul; i++)
1743 *cp++ = '\0';
1744 }
1745 break;
1746 }
1747 count -= m->m_len;
1748 }
1749 for (m = m->m_next;m;m = m->m_next)
1750 m->m_len = 0;
1751}
1752
1753/*
1754 * Make these functions instead of macros, so that the kernel text size
1755 * doesn't get too big...
1756 */
1757void
1758nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp)
1759 struct nfsrv_descript *nfsd;
1760 int before_ret;
1761 register struct vattr *before_vap;
1762 int after_ret;
1763 struct vattr *after_vap;
1764 struct mbuf **mbp;
1765 char **bposp;
1766{
1767 register struct mbuf *mb = *mbp, *mb2;
1768 register char *bpos = *bposp;
1769 register u_int32_t *tl;
1770
1771 if (before_ret) {
1772 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1773 *tl = nfs_false;
1774 } else {
1775 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
1776 *tl++ = nfs_true;
1777 txdr_hyper(&(before_vap->va_size), tl);
1778 tl += 2;
1779 txdr_nfsv3time(&(before_vap->va_mtime), tl);
1780 tl += 2;
1781 txdr_nfsv3time(&(before_vap->va_ctime), tl);
1782 }
1783 *bposp = bpos;
1784 *mbp = mb;
1785 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
1786}
1787
1788void
1789nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp)
1790 struct nfsrv_descript *nfsd;
1791 int after_ret;
1792 struct vattr *after_vap;
1793 struct mbuf **mbp;
1794 char **bposp;
1795{
1796 register struct mbuf *mb = *mbp, *mb2;
1797 register char *bpos = *bposp;
1798 register u_int32_t *tl;
1799 register struct nfs_fattr *fp;
1800
1801 if (after_ret) {
1802 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1803 *tl = nfs_false;
1804 } else {
1805 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR);
1806 *tl++ = nfs_true;
1807 fp = (struct nfs_fattr *)tl;
1808 nfsm_srvfattr(nfsd, after_vap, fp);
1809 }
1810 *mbp = mb;
1811 *bposp = bpos;
1812}
1813
1814void
1815nfsm_srvfattr(nfsd, vap, fp)
1816 register struct nfsrv_descript *nfsd;
1817 register struct vattr *vap;
1818 register struct nfs_fattr *fp;
1819{
1820
1821 fp->fa_nlink = txdr_unsigned(vap->va_nlink);
1822 fp->fa_uid = txdr_unsigned(vap->va_uid);
1823 fp->fa_gid = txdr_unsigned(vap->va_gid);
1824 if (nfsd->nd_flag & ND_NFSV3) {
1825 fp->fa_type = vtonfsv3_type(vap->va_type);
1826 fp->fa_mode = vtonfsv3_mode(vap->va_mode);
1827 txdr_hyper(&vap->va_size, &fp->fa3_size);
1828 txdr_hyper(&vap->va_bytes, &fp->fa3_used);
1829 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev));
1830 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev));
1831 fp->fa3_fsid.nfsuquad[0] = 0;
1832 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
1833 fp->fa3_fileid.nfsuquad[0] = 0;
1834 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
1835 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
1836 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
1837 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
1838 } else {
1839 fp->fa_type = vtonfsv2_type(vap->va_type);
1840 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1841 fp->fa2_size = txdr_unsigned(vap->va_size);
1842 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
1843 if (vap->va_type == VFIFO)
1844 fp->fa2_rdev = 0xffffffff;
1845 else
1846 fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
1847 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
1848 fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
1849 fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
1850 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
1851 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
1852 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
1853 }
1854}
1855
1856/*
1857 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
1858 * - look up fsid in mount list (if not found ret error)
1859 * - get vp and export rights by calling VFS_FHTOVP()
1860 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
1861 * - if not lockflag unlock it with VOP_UNLOCK()
1862 */
1863int
1864nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag)
1865 fhandle_t *fhp;
1866 int lockflag;
1867 struct vnode **vpp;
1868 struct ucred *cred;
1869 struct nfssvc_sock *slp;
1870 struct sockaddr *nam;
1871 int *rdonlyp;
1872 int kerbflag;
1873 int pubflag;
1874{
1875 struct proc *p = curproc; /* XXX */
1876 register struct mount *mp;
1877 register int i;
1878 struct ucred *credanon;
1879 int error, exflags;
1880#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */
1881 struct sockaddr_int *saddr;
1882#endif
1883
1884 *vpp = (struct vnode *)0;
1885
1886 if (nfs_ispublicfh(fhp)) {
1887 if (!pubflag || !nfs_pub.np_valid)
1888 return (ESTALE);
1889 fhp = &nfs_pub.np_handle;
1890 }
1891
1892 mp = vfs_getvfs(&fhp->fh_fsid);
1893 if (!mp)
1894 return (ESTALE);
1895 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon);
1896 if (error)
1897 return (error);
1898#ifdef MNT_EXNORESPORT
1899 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) {
1900 saddr = (struct sockaddr_in *)nam;
1901 if (saddr->sin_family == AF_INET &&
1902 ntohs(saddr->sin_port) >= IPPORT_RESERVED) {
1903 vput(*vpp);
1904 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1905 }
1906 }
1907#endif
1908 /*
1909 * Check/setup credentials.
1910 */
1911 if (exflags & MNT_EXKERB) {
1912 if (!kerbflag) {
1913 vput(*vpp);
1914 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1915 }
1916 } else if (kerbflag) {
1917 vput(*vpp);
1918 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1919 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
1920 cred->cr_uid = credanon->cr_uid;
1921 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++)
1922 cred->cr_groups[i] = credanon->cr_groups[i];
1923 cred->cr_ngroups = i;
1924 }
1925 if (exflags & MNT_EXRDONLY)
1926 *rdonlyp = 1;
1927 else
1928 *rdonlyp = 0;
1929
1930 nfsrv_object_create(*vpp);
1931
1932 if (!lockflag)
1933 VOP_UNLOCK(*vpp, 0, p);
1934 return (0);
1935}
1936
1937
1938/*
1939 * WebNFS: check if a filehandle is a public filehandle. For v3, this
1940 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has
1941 * transformed this to all zeroes in both cases, so check for it.
1942 */
1943int
1944nfs_ispublicfh(fhp)
1945 fhandle_t *fhp;
1946{
1947 char *cp = (char *)fhp;
1948 int i;
1949
1950 for (i = 0; i < NFSX_V3FH; i++)
1951 if (*cp++ != 0)
1952 return (FALSE);
1953 return (TRUE);
1954}
1955
1956#endif /* NFS_NOSERVER */
1957/*
1958 * This function compares two net addresses by family and returns TRUE
1959 * if they are the same host.
1960 * If there is any doubt, return FALSE.
1961 * The AF_INET family is handled as a special case so that address mbufs
1962 * don't need to be saved to store "struct in_addr", which is only 4 bytes.
1963 */
1964int
1965netaddr_match(family, haddr, nam)
1966 int family;
1967 union nethostaddr *haddr;
1968 struct sockaddr *nam;
1969{
1970 register struct sockaddr_in *inetaddr;
1971
1972 switch (family) {
1973 case AF_INET:
1974 inetaddr = (struct sockaddr_in *)nam;
1975 if (inetaddr->sin_family == AF_INET &&
1976 inetaddr->sin_addr.s_addr == haddr->had_inetaddr)
1977 return (1);
1978 break;
1979#ifdef ISO
1980 case AF_ISO:
1981 {
1982 register struct sockaddr_iso *isoaddr1, *isoaddr2;
1983
1984 isoaddr1 = (struct sockaddr_iso *)nam;
1985 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam;
1986 if (isoaddr1->siso_family == AF_ISO &&
1987 isoaddr1->siso_nlen > 0 &&
1988 isoaddr1->siso_nlen == isoaddr2->siso_nlen &&
1989 SAME_ISOADDR(isoaddr1, isoaddr2))
1990 return (1);
1991 break;
1992 }
1993#endif /* ISO */
1994 default:
1995 break;
1996 };
1997 return (0);
1998}
1999
2000static nfsuint64 nfs_nullcookie = { 0, 0 };
2001/*
2002 * This function finds the directory cookie that corresponds to the
2003 * logical byte offset given.
2004 */
2005nfsuint64 *
2006nfs_getcookie(np, off, add)
2007 register struct nfsnode *np;
2008 off_t off;
2009 int add;
2010{
2011 register struct nfsdmap *dp, *dp2;
2012 register int pos;
2013
2014 pos = (uoff_t)off / NFS_DIRBLKSIZ;
2015 if (pos == 0 || off < 0) {
2016#ifdef DIAGNOSTIC
2017 if (add)
2018 panic("nfs getcookie add at <= 0");
2019#endif
2020 return (&nfs_nullcookie);
2021 }
2022 pos--;
2023 dp = np->n_cookies.lh_first;
2024 if (!dp) {
2025 if (add) {
2026 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
2027 M_NFSDIROFF, M_WAITOK);
2028 dp->ndm_eocookie = 0;
2029 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
2030 } else
2031 return ((nfsuint64 *)0);
2032 }
2033 while (pos >= NFSNUMCOOKIES) {
2034 pos -= NFSNUMCOOKIES;
2035 if (dp->ndm_list.le_next) {
2036 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
2037 pos >= dp->ndm_eocookie)
2038 return ((nfsuint64 *)0);
2039 dp = dp->ndm_list.le_next;
2040 } else if (add) {
2041 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
2042 M_NFSDIROFF, M_WAITOK);
2043 dp2->ndm_eocookie = 0;
2044 LIST_INSERT_AFTER(dp, dp2, ndm_list);
2045 dp = dp2;
2046 } else
2047 return ((nfsuint64 *)0);
2048 }
2049 if (pos >= dp->ndm_eocookie) {
2050 if (add)
2051 dp->ndm_eocookie = pos + 1;
2052 else
2053 return ((nfsuint64 *)0);
2054 }
2055 return (&dp->ndm_cookies[pos]);
2056}
2057
2058/*
2059 * Invalidate cached directory information, except for the actual directory
2060 * blocks (which are invalidated separately).
2061 * Done mainly to avoid the use of stale offset cookies.
2062 */
2063void
2064nfs_invaldir(vp)
2065 register struct vnode *vp;
2066{
2067 register struct nfsnode *np = VTONFS(vp);
2068
2069#ifdef DIAGNOSTIC
2070 if (vp->v_type != VDIR)
2071 panic("nfs: invaldir not dir");
2072#endif
2073 np->n_direofoffset = 0;
2074 np->n_cookieverf.nfsuquad[0] = 0;
2075 np->n_cookieverf.nfsuquad[1] = 0;
2076 if (np->n_cookies.lh_first)
2077 np->n_cookies.lh_first->ndm_eocookie = 0;
2078}
2079
2080/*
2081 * The write verifier has changed (probably due to a server reboot), so all
2082 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the
2083 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
2084 * flag. Once done the new write verifier can be set for the mount point.
2085 */
2086void
2087nfs_clearcommit(mp)
2088 struct mount *mp;
2089{
2090 register struct vnode *vp, *nvp;
2091 register struct buf *bp, *nbp;
2092 int s;
2093
2094 s = splbio();
2095loop:
2096 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) {
2097 if (vp->v_mount != mp) /* Paranoia */
2098 goto loop;
2099 nvp = vp->v_mntvnodes.le_next;
2100 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
2101 nbp = bp->b_vnbufs.le_next;
2102 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT))
2103 == (B_DELWRI | B_NEEDCOMMIT))
2104 bp->b_flags &= ~B_NEEDCOMMIT;
2105 }
2106 }
2107 splx(s);
2108}
2109
2110#ifndef NFS_NOSERVER
2111/*
2112 * Map errnos to NFS error numbers. For Version 3 also filter out error
2113 * numbers not specified for the associated procedure.
2114 */
2115int
2116nfsrv_errmap(nd, err)
2117 struct nfsrv_descript *nd;
2118 register int err;
2119{
2120 register short *defaulterrp, *errp;
2121
2122 if (nd->nd_flag & ND_NFSV3) {
2123 if (nd->nd_procnum <= NFSPROC_COMMIT) {
2124 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
2125 while (*++errp) {
2126 if (*errp == err)
2127 return (err);
2128 else if (*errp > err)
2129 break;
2130 }
2131 return ((int)*defaulterrp);
2132 } else
2133 return (err & 0xffff);
2134 }
2135 if (err <= ELAST)
2136 return ((int)nfsrv_v2errmap[err - 1]);
2137 return (NFSERR_IO);
2138}
2139
2140int
2141nfsrv_object_create(vp)
2142 struct vnode *vp;
2143{
2144
2145 if (vp == NULL || vp->v_type != VREG)
2146 return (1);
2147 return (vfs_object_create(vp, curproc,
2148 curproc ? curproc->p_ucred : NULL, 1));
2149}
2150
2151/*
2152 * Sort the group list in increasing numerical order.
2153 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort
2154 * that used to be here.)
2155 */
2156void
2157nfsrvw_sort(list, num)
2158 register gid_t *list;
2159 register int num;
2160{
2161 register int i, j;
2162 gid_t v;
2163
2164 /* Insertion sort. */
2165 for (i = 1; i < num; i++) {
2166 v = list[i];
2167 /* find correct slot for value v, moving others up */
2168 for (j = i; --j >= 0 && v < list[j];)
2169 list[j + 1] = list[j];
2170 list[j + 1] = v;
2171 }
2172}
2173
2174/*
2175 * copy credentials making sure that the result can be compared with bcmp().
2176 */
2177void
2178nfsrv_setcred(incred, outcred)
2179 register struct ucred *incred, *outcred;
2180{
2181 register int i;
2182
2183 bzero((caddr_t)outcred, sizeof (struct ucred));
2184 outcred->cr_ref = 1;
2185 outcred->cr_uid = incred->cr_uid;
2186 outcred->cr_ngroups = incred->cr_ngroups;
2187 for (i = 0; i < incred->cr_ngroups; i++)
2188 outcred->cr_groups[i] = incred->cr_groups[i];
2189 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups);
2190}
2191#endif /* NFS_NOSERVER */
| 1417 (time_second - np->n_attrstamp), timeo);
1418#endif
1419
1420 if ((time_second - np->n_attrstamp) >= timeo) {
1421 nfsstats.attrcache_misses++;
1422 return (ENOENT);
1423 }
1424 nfsstats.attrcache_hits++;
1425 if (vap->va_size != np->n_size) {
1426 if (vap->va_type == VREG) {
1427 if (np->n_flag & NMODIFIED) {
1428 if (vap->va_size < np->n_size)
1429 vap->va_size = np->n_size;
1430 else
1431 np->n_size = vap->va_size;
1432 } else
1433 np->n_size = vap->va_size;
1434 vnode_pager_setsize(vp, (u_long)np->n_size);
1435 } else
1436 np->n_size = vap->va_size;
1437 }
1438 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
1439 if (np->n_flag & NCHG) {
1440 if (np->n_flag & NACC)
1441 vaper->va_atime = np->n_atim;
1442 if (np->n_flag & NUPD)
1443 vaper->va_mtime = np->n_mtim;
1444 }
1445 return (0);
1446}
1447
1448#ifndef NFS_NOSERVER
1449/*
1450 * Set up nameidata for a lookup() call and do it.
1451 *
1452 * If pubflag is set, this call is done for a lookup operation on the
1453 * public filehandle. In that case we allow crossing mountpoints and
1454 * absolute pathnames. However, the caller is expected to check that
1455 * the lookup result is within the public fs, and deny access if
1456 * it is not.
1457 */
1458int
1459nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag)
1460 register struct nameidata *ndp;
1461 fhandle_t *fhp;
1462 int len;
1463 struct nfssvc_sock *slp;
1464 struct sockaddr *nam;
1465 struct mbuf **mdp;
1466 caddr_t *dposp;
1467 struct vnode **retdirp;
1468 struct proc *p;
1469 int kerbflag, pubflag;
1470{
1471 register int i, rem;
1472 register struct mbuf *md;
1473 register char *fromcp, *tocp, *cp;
1474 struct iovec aiov;
1475 struct uio auio;
1476 struct vnode *dp;
1477 int error, rdonly, linklen;
1478 struct componentname *cnp = &ndp->ni_cnd;
1479
1480 *retdirp = (struct vnode *)0;
1481 cnp->cn_pnbuf = zalloc(namei_zone);
1482
1483 /*
1484 * Copy the name from the mbuf list to ndp->ni_pnbuf
1485 * and set the various ndp fields appropriately.
1486 */
1487 fromcp = *dposp;
1488 tocp = cnp->cn_pnbuf;
1489 md = *mdp;
1490 rem = mtod(md, caddr_t) + md->m_len - fromcp;
1491 cnp->cn_hash = 0;
1492 for (i = 0; i < len; i++) {
1493 while (rem == 0) {
1494 md = md->m_next;
1495 if (md == NULL) {
1496 error = EBADRPC;
1497 goto out;
1498 }
1499 fromcp = mtod(md, caddr_t);
1500 rem = md->m_len;
1501 }
1502 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) {
1503 error = EACCES;
1504 goto out;
1505 }
1506 cnp->cn_hash += (unsigned char)*fromcp;
1507 *tocp++ = *fromcp++;
1508 rem--;
1509 }
1510 *tocp = '\0';
1511 *mdp = md;
1512 *dposp = fromcp;
1513 len = nfsm_rndup(len)-len;
1514 if (len > 0) {
1515 if (rem >= len)
1516 *dposp += len;
1517 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0)
1518 goto out;
1519 }
1520
1521 /*
1522 * Extract and set starting directory.
1523 */
1524 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp,
1525 nam, &rdonly, kerbflag, pubflag);
1526 if (error)
1527 goto out;
1528 if (dp->v_type != VDIR) {
1529 vrele(dp);
1530 error = ENOTDIR;
1531 goto out;
1532 }
1533
1534 if (rdonly)
1535 cnp->cn_flags |= RDONLY;
1536
1537 *retdirp = dp;
1538
1539 if (pubflag) {
1540 /*
1541 * Oh joy. For WebNFS, handle those pesky '%' escapes,
1542 * and the 'native path' indicator.
1543 */
1544 cp = zalloc(namei_zone);
1545 fromcp = cnp->cn_pnbuf;
1546 tocp = cp;
1547 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) {
1548 switch ((unsigned char)*fromcp) {
1549 case WEBNFS_NATIVE_CHAR:
1550 /*
1551 * 'Native' path for us is the same
1552 * as a path according to the NFS spec,
1553 * just skip the escape char.
1554 */
1555 fromcp++;
1556 break;
1557 /*
1558 * More may be added in the future, range 0x80-0xff
1559 */
1560 default:
1561 error = EIO;
1562 zfree(namei_zone, cp);
1563 goto out;
1564 }
1565 }
1566 /*
1567 * Translate the '%' escapes, URL-style.
1568 */
1569 while (*fromcp != '\0') {
1570 if (*fromcp == WEBNFS_ESC_CHAR) {
1571 if (fromcp[1] != '\0' && fromcp[2] != '\0') {
1572 fromcp++;
1573 *tocp++ = HEXSTRTOI(fromcp);
1574 fromcp += 2;
1575 continue;
1576 } else {
1577 error = ENOENT;
1578 zfree(namei_zone, cp);
1579 goto out;
1580 }
1581 } else
1582 *tocp++ = *fromcp++;
1583 }
1584 *tocp = '\0';
1585 zfree(namei_zone, cnp->cn_pnbuf);
1586 cnp->cn_pnbuf = cp;
1587 }
1588
1589 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1;
1590 ndp->ni_segflg = UIO_SYSSPACE;
1591
1592 if (pubflag) {
1593 ndp->ni_rootdir = rootvnode;
1594 ndp->ni_loopcnt = 0;
1595 if (cnp->cn_pnbuf[0] == '/')
1596 dp = rootvnode;
1597 } else {
1598 cnp->cn_flags |= NOCROSSMOUNT;
1599 }
1600
1601 cnp->cn_proc = p;
1602 VREF(dp);
1603
1604 for (;;) {
1605 cnp->cn_nameptr = cnp->cn_pnbuf;
1606 ndp->ni_startdir = dp;
1607 /*
1608 * And call lookup() to do the real work
1609 */
1610 error = lookup(ndp);
1611 if (error)
1612 break;
1613 /*
1614 * Check for encountering a symbolic link
1615 */
1616 if ((cnp->cn_flags & ISSYMLINK) == 0) {
1617 nfsrv_object_create(ndp->ni_vp);
1618 if (cnp->cn_flags & (SAVENAME | SAVESTART)) {
1619 cnp->cn_flags |= HASBUF;
1620 return (0);
1621 }
1622 break;
1623 } else {
1624 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1)
1625 VOP_UNLOCK(ndp->ni_dvp, 0, p);
1626 if (!pubflag) {
1627 vrele(ndp->ni_dvp);
1628 vput(ndp->ni_vp);
1629 ndp->ni_vp = NULL;
1630 error = EINVAL;
1631 break;
1632 }
1633
1634 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) {
1635 error = ELOOP;
1636 break;
1637 }
1638 if (ndp->ni_pathlen > 1)
1639 cp = zalloc(namei_zone);
1640 else
1641 cp = cnp->cn_pnbuf;
1642 aiov.iov_base = cp;
1643 aiov.iov_len = MAXPATHLEN;
1644 auio.uio_iov = &aiov;
1645 auio.uio_iovcnt = 1;
1646 auio.uio_offset = 0;
1647 auio.uio_rw = UIO_READ;
1648 auio.uio_segflg = UIO_SYSSPACE;
1649 auio.uio_procp = (struct proc *)0;
1650 auio.uio_resid = MAXPATHLEN;
1651 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred);
1652 if (error) {
1653 badlink:
1654 if (ndp->ni_pathlen > 1)
1655 zfree(namei_zone, cp);
1656 break;
1657 }
1658 linklen = MAXPATHLEN - auio.uio_resid;
1659 if (linklen == 0) {
1660 error = ENOENT;
1661 goto badlink;
1662 }
1663 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) {
1664 error = ENAMETOOLONG;
1665 goto badlink;
1666 }
1667 if (ndp->ni_pathlen > 1) {
1668 bcopy(ndp->ni_next, cp + linklen, ndp->ni_pathlen);
1669 zfree(namei_zone, cnp->cn_pnbuf);
1670 cnp->cn_pnbuf = cp;
1671 } else
1672 cnp->cn_pnbuf[linklen] = '\0';
1673 ndp->ni_pathlen += linklen;
1674 vput(ndp->ni_vp);
1675 dp = ndp->ni_dvp;
1676 /*
1677 * Check if root directory should replace current directory.
1678 */
1679 if (cnp->cn_pnbuf[0] == '/') {
1680 vrele(dp);
1681 dp = ndp->ni_rootdir;
1682 VREF(dp);
1683 }
1684 }
1685 }
1686out:
1687 zfree(namei_zone, cnp->cn_pnbuf);
1688 return (error);
1689}
1690
1691/*
1692 * A fiddled version of m_adj() that ensures null fill to a long
1693 * boundary and only trims off the back end
1694 */
1695void
1696nfsm_adj(mp, len, nul)
1697 struct mbuf *mp;
1698 register int len;
1699 int nul;
1700{
1701 register struct mbuf *m;
1702 register int count, i;
1703 register char *cp;
1704
1705 /*
1706 * Trim from tail. Scan the mbuf chain,
1707 * calculating its length and finding the last mbuf.
1708 * If the adjustment only affects this mbuf, then just
1709 * adjust and return. Otherwise, rescan and truncate
1710 * after the remaining size.
1711 */
1712 count = 0;
1713 m = mp;
1714 for (;;) {
1715 count += m->m_len;
1716 if (m->m_next == (struct mbuf *)0)
1717 break;
1718 m = m->m_next;
1719 }
1720 if (m->m_len > len) {
1721 m->m_len -= len;
1722 if (nul > 0) {
1723 cp = mtod(m, caddr_t)+m->m_len-nul;
1724 for (i = 0; i < nul; i++)
1725 *cp++ = '\0';
1726 }
1727 return;
1728 }
1729 count -= len;
1730 if (count < 0)
1731 count = 0;
1732 /*
1733 * Correct length for chain is "count".
1734 * Find the mbuf with last data, adjust its length,
1735 * and toss data from remaining mbufs on chain.
1736 */
1737 for (m = mp; m; m = m->m_next) {
1738 if (m->m_len >= count) {
1739 m->m_len = count;
1740 if (nul > 0) {
1741 cp = mtod(m, caddr_t)+m->m_len-nul;
1742 for (i = 0; i < nul; i++)
1743 *cp++ = '\0';
1744 }
1745 break;
1746 }
1747 count -= m->m_len;
1748 }
1749 for (m = m->m_next;m;m = m->m_next)
1750 m->m_len = 0;
1751}
1752
1753/*
1754 * Make these functions instead of macros, so that the kernel text size
1755 * doesn't get too big...
1756 */
1757void
1758nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp)
1759 struct nfsrv_descript *nfsd;
1760 int before_ret;
1761 register struct vattr *before_vap;
1762 int after_ret;
1763 struct vattr *after_vap;
1764 struct mbuf **mbp;
1765 char **bposp;
1766{
1767 register struct mbuf *mb = *mbp, *mb2;
1768 register char *bpos = *bposp;
1769 register u_int32_t *tl;
1770
1771 if (before_ret) {
1772 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1773 *tl = nfs_false;
1774 } else {
1775 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
1776 *tl++ = nfs_true;
1777 txdr_hyper(&(before_vap->va_size), tl);
1778 tl += 2;
1779 txdr_nfsv3time(&(before_vap->va_mtime), tl);
1780 tl += 2;
1781 txdr_nfsv3time(&(before_vap->va_ctime), tl);
1782 }
1783 *bposp = bpos;
1784 *mbp = mb;
1785 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp);
1786}
1787
1788void
1789nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp)
1790 struct nfsrv_descript *nfsd;
1791 int after_ret;
1792 struct vattr *after_vap;
1793 struct mbuf **mbp;
1794 char **bposp;
1795{
1796 register struct mbuf *mb = *mbp, *mb2;
1797 register char *bpos = *bposp;
1798 register u_int32_t *tl;
1799 register struct nfs_fattr *fp;
1800
1801 if (after_ret) {
1802 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
1803 *tl = nfs_false;
1804 } else {
1805 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR);
1806 *tl++ = nfs_true;
1807 fp = (struct nfs_fattr *)tl;
1808 nfsm_srvfattr(nfsd, after_vap, fp);
1809 }
1810 *mbp = mb;
1811 *bposp = bpos;
1812}
1813
1814void
1815nfsm_srvfattr(nfsd, vap, fp)
1816 register struct nfsrv_descript *nfsd;
1817 register struct vattr *vap;
1818 register struct nfs_fattr *fp;
1819{
1820
1821 fp->fa_nlink = txdr_unsigned(vap->va_nlink);
1822 fp->fa_uid = txdr_unsigned(vap->va_uid);
1823 fp->fa_gid = txdr_unsigned(vap->va_gid);
1824 if (nfsd->nd_flag & ND_NFSV3) {
1825 fp->fa_type = vtonfsv3_type(vap->va_type);
1826 fp->fa_mode = vtonfsv3_mode(vap->va_mode);
1827 txdr_hyper(&vap->va_size, &fp->fa3_size);
1828 txdr_hyper(&vap->va_bytes, &fp->fa3_used);
1829 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev));
1830 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev));
1831 fp->fa3_fsid.nfsuquad[0] = 0;
1832 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid);
1833 fp->fa3_fileid.nfsuquad[0] = 0;
1834 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid);
1835 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime);
1836 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime);
1837 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime);
1838 } else {
1839 fp->fa_type = vtonfsv2_type(vap->va_type);
1840 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1841 fp->fa2_size = txdr_unsigned(vap->va_size);
1842 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize);
1843 if (vap->va_type == VFIFO)
1844 fp->fa2_rdev = 0xffffffff;
1845 else
1846 fp->fa2_rdev = txdr_unsigned(vap->va_rdev);
1847 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE);
1848 fp->fa2_fsid = txdr_unsigned(vap->va_fsid);
1849 fp->fa2_fileid = txdr_unsigned(vap->va_fileid);
1850 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime);
1851 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime);
1852 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime);
1853 }
1854}
1855
1856/*
1857 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked)
1858 * - look up fsid in mount list (if not found ret error)
1859 * - get vp and export rights by calling VFS_FHTOVP()
1860 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon
1861 * - if not lockflag unlock it with VOP_UNLOCK()
1862 */
1863int
1864nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag)
1865 fhandle_t *fhp;
1866 int lockflag;
1867 struct vnode **vpp;
1868 struct ucred *cred;
1869 struct nfssvc_sock *slp;
1870 struct sockaddr *nam;
1871 int *rdonlyp;
1872 int kerbflag;
1873 int pubflag;
1874{
1875 struct proc *p = curproc; /* XXX */
1876 register struct mount *mp;
1877 register int i;
1878 struct ucred *credanon;
1879 int error, exflags;
1880#ifdef MNT_EXNORESPORT /* XXX needs mountd and /etc/exports help yet */
1881 struct sockaddr_int *saddr;
1882#endif
1883
1884 *vpp = (struct vnode *)0;
1885
1886 if (nfs_ispublicfh(fhp)) {
1887 if (!pubflag || !nfs_pub.np_valid)
1888 return (ESTALE);
1889 fhp = &nfs_pub.np_handle;
1890 }
1891
1892 mp = vfs_getvfs(&fhp->fh_fsid);
1893 if (!mp)
1894 return (ESTALE);
1895 error = VFS_FHTOVP(mp, &fhp->fh_fid, nam, vpp, &exflags, &credanon);
1896 if (error)
1897 return (error);
1898#ifdef MNT_EXNORESPORT
1899 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) {
1900 saddr = (struct sockaddr_in *)nam;
1901 if (saddr->sin_family == AF_INET &&
1902 ntohs(saddr->sin_port) >= IPPORT_RESERVED) {
1903 vput(*vpp);
1904 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1905 }
1906 }
1907#endif
1908 /*
1909 * Check/setup credentials.
1910 */
1911 if (exflags & MNT_EXKERB) {
1912 if (!kerbflag) {
1913 vput(*vpp);
1914 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1915 }
1916 } else if (kerbflag) {
1917 vput(*vpp);
1918 return (NFSERR_AUTHERR | AUTH_TOOWEAK);
1919 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) {
1920 cred->cr_uid = credanon->cr_uid;
1921 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++)
1922 cred->cr_groups[i] = credanon->cr_groups[i];
1923 cred->cr_ngroups = i;
1924 }
1925 if (exflags & MNT_EXRDONLY)
1926 *rdonlyp = 1;
1927 else
1928 *rdonlyp = 0;
1929
1930 nfsrv_object_create(*vpp);
1931
1932 if (!lockflag)
1933 VOP_UNLOCK(*vpp, 0, p);
1934 return (0);
1935}
1936
1937
1938/*
1939 * WebNFS: check if a filehandle is a public filehandle. For v3, this
1940 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has
1941 * transformed this to all zeroes in both cases, so check for it.
1942 */
1943int
1944nfs_ispublicfh(fhp)
1945 fhandle_t *fhp;
1946{
1947 char *cp = (char *)fhp;
1948 int i;
1949
1950 for (i = 0; i < NFSX_V3FH; i++)
1951 if (*cp++ != 0)
1952 return (FALSE);
1953 return (TRUE);
1954}
1955
1956#endif /* NFS_NOSERVER */
1957/*
1958 * This function compares two net addresses by family and returns TRUE
1959 * if they are the same host.
1960 * If there is any doubt, return FALSE.
1961 * The AF_INET family is handled as a special case so that address mbufs
1962 * don't need to be saved to store "struct in_addr", which is only 4 bytes.
1963 */
1964int
1965netaddr_match(family, haddr, nam)
1966 int family;
1967 union nethostaddr *haddr;
1968 struct sockaddr *nam;
1969{
1970 register struct sockaddr_in *inetaddr;
1971
1972 switch (family) {
1973 case AF_INET:
1974 inetaddr = (struct sockaddr_in *)nam;
1975 if (inetaddr->sin_family == AF_INET &&
1976 inetaddr->sin_addr.s_addr == haddr->had_inetaddr)
1977 return (1);
1978 break;
1979#ifdef ISO
1980 case AF_ISO:
1981 {
1982 register struct sockaddr_iso *isoaddr1, *isoaddr2;
1983
1984 isoaddr1 = (struct sockaddr_iso *)nam;
1985 isoaddr2 = (struct sockaddr_iso *)haddr->had_nam;
1986 if (isoaddr1->siso_family == AF_ISO &&
1987 isoaddr1->siso_nlen > 0 &&
1988 isoaddr1->siso_nlen == isoaddr2->siso_nlen &&
1989 SAME_ISOADDR(isoaddr1, isoaddr2))
1990 return (1);
1991 break;
1992 }
1993#endif /* ISO */
1994 default:
1995 break;
1996 };
1997 return (0);
1998}
1999
2000static nfsuint64 nfs_nullcookie = { 0, 0 };
2001/*
2002 * This function finds the directory cookie that corresponds to the
2003 * logical byte offset given.
2004 */
2005nfsuint64 *
2006nfs_getcookie(np, off, add)
2007 register struct nfsnode *np;
2008 off_t off;
2009 int add;
2010{
2011 register struct nfsdmap *dp, *dp2;
2012 register int pos;
2013
2014 pos = (uoff_t)off / NFS_DIRBLKSIZ;
2015 if (pos == 0 || off < 0) {
2016#ifdef DIAGNOSTIC
2017 if (add)
2018 panic("nfs getcookie add at <= 0");
2019#endif
2020 return (&nfs_nullcookie);
2021 }
2022 pos--;
2023 dp = np->n_cookies.lh_first;
2024 if (!dp) {
2025 if (add) {
2026 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
2027 M_NFSDIROFF, M_WAITOK);
2028 dp->ndm_eocookie = 0;
2029 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
2030 } else
2031 return ((nfsuint64 *)0);
2032 }
2033 while (pos >= NFSNUMCOOKIES) {
2034 pos -= NFSNUMCOOKIES;
2035 if (dp->ndm_list.le_next) {
2036 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
2037 pos >= dp->ndm_eocookie)
2038 return ((nfsuint64 *)0);
2039 dp = dp->ndm_list.le_next;
2040 } else if (add) {
2041 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
2042 M_NFSDIROFF, M_WAITOK);
2043 dp2->ndm_eocookie = 0;
2044 LIST_INSERT_AFTER(dp, dp2, ndm_list);
2045 dp = dp2;
2046 } else
2047 return ((nfsuint64 *)0);
2048 }
2049 if (pos >= dp->ndm_eocookie) {
2050 if (add)
2051 dp->ndm_eocookie = pos + 1;
2052 else
2053 return ((nfsuint64 *)0);
2054 }
2055 return (&dp->ndm_cookies[pos]);
2056}
2057
2058/*
2059 * Invalidate cached directory information, except for the actual directory
2060 * blocks (which are invalidated separately).
2061 * Done mainly to avoid the use of stale offset cookies.
2062 */
2063void
2064nfs_invaldir(vp)
2065 register struct vnode *vp;
2066{
2067 register struct nfsnode *np = VTONFS(vp);
2068
2069#ifdef DIAGNOSTIC
2070 if (vp->v_type != VDIR)
2071 panic("nfs: invaldir not dir");
2072#endif
2073 np->n_direofoffset = 0;
2074 np->n_cookieverf.nfsuquad[0] = 0;
2075 np->n_cookieverf.nfsuquad[1] = 0;
2076 if (np->n_cookies.lh_first)
2077 np->n_cookies.lh_first->ndm_eocookie = 0;
2078}
2079
2080/*
2081 * The write verifier has changed (probably due to a server reboot), so all
2082 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the
2083 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
2084 * flag. Once done the new write verifier can be set for the mount point.
2085 */
2086void
2087nfs_clearcommit(mp)
2088 struct mount *mp;
2089{
2090 register struct vnode *vp, *nvp;
2091 register struct buf *bp, *nbp;
2092 int s;
2093
2094 s = splbio();
2095loop:
2096 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) {
2097 if (vp->v_mount != mp) /* Paranoia */
2098 goto loop;
2099 nvp = vp->v_mntvnodes.le_next;
2100 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
2101 nbp = bp->b_vnbufs.le_next;
2102 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT))
2103 == (B_DELWRI | B_NEEDCOMMIT))
2104 bp->b_flags &= ~B_NEEDCOMMIT;
2105 }
2106 }
2107 splx(s);
2108}
2109
2110#ifndef NFS_NOSERVER
2111/*
2112 * Map errnos to NFS error numbers. For Version 3 also filter out error
2113 * numbers not specified for the associated procedure.
2114 */
2115int
2116nfsrv_errmap(nd, err)
2117 struct nfsrv_descript *nd;
2118 register int err;
2119{
2120 register short *defaulterrp, *errp;
2121
2122 if (nd->nd_flag & ND_NFSV3) {
2123 if (nd->nd_procnum <= NFSPROC_COMMIT) {
2124 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum];
2125 while (*++errp) {
2126 if (*errp == err)
2127 return (err);
2128 else if (*errp > err)
2129 break;
2130 }
2131 return ((int)*defaulterrp);
2132 } else
2133 return (err & 0xffff);
2134 }
2135 if (err <= ELAST)
2136 return ((int)nfsrv_v2errmap[err - 1]);
2137 return (NFSERR_IO);
2138}
2139
2140int
2141nfsrv_object_create(vp)
2142 struct vnode *vp;
2143{
2144
2145 if (vp == NULL || vp->v_type != VREG)
2146 return (1);
2147 return (vfs_object_create(vp, curproc,
2148 curproc ? curproc->p_ucred : NULL, 1));
2149}
2150
2151/*
2152 * Sort the group list in increasing numerical order.
2153 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort
2154 * that used to be here.)
2155 */
2156void
2157nfsrvw_sort(list, num)
2158 register gid_t *list;
2159 register int num;
2160{
2161 register int i, j;
2162 gid_t v;
2163
2164 /* Insertion sort. */
2165 for (i = 1; i < num; i++) {
2166 v = list[i];
2167 /* find correct slot for value v, moving others up */
2168 for (j = i; --j >= 0 && v < list[j];)
2169 list[j + 1] = list[j];
2170 list[j + 1] = v;
2171 }
2172}
2173
2174/*
2175 * copy credentials making sure that the result can be compared with bcmp().
2176 */
2177void
2178nfsrv_setcred(incred, outcred)
2179 register struct ucred *incred, *outcred;
2180{
2181 register int i;
2182
2183 bzero((caddr_t)outcred, sizeof (struct ucred));
2184 outcred->cr_ref = 1;
2185 outcred->cr_uid = incred->cr_uid;
2186 outcred->cr_ngroups = incred->cr_ngroups;
2187 for (i = 0; i < incred->cr_ngroups; i++)
2188 outcred->cr_groups[i] = incred->cr_groups[i];
2189 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups);
2190}
2191#endif /* NFS_NOSERVER */
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