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386BSD 0.1 development
[unix-history] / usr / src / sys.386bsd / nfs / nfs_vnops.c
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23aa42f4
WJ		 1/*
2 * Copyright (c) 1989 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)nfs_vnops.c 7.60 (Berkeley) 5/24/91
37 */
38
39/*
40 * vnode op calls for sun nfs version 2
41 */
42
43#include "param.h"
44#include "proc.h"
45#include "kernel.h"
46#include "systm.h"
47#include "mount.h"
48#include "buf.h"
49#include "malloc.h"
50#include "mbuf.h"
51#include "conf.h"
52#include "namei.h"
53#include "vnode.h"
54#include "specdev.h"
55#include "fifo.h"
56
57#include "../ufs/quota.h"
58#include "../ufs/inode.h"
59#include "../ufs/dir.h"
60
61#include "nfsv2.h"
62#include "nfs.h"
63#include "nfsnode.h"
64#include "nfsmount.h"
65#include "xdr_subs.h"
66#include "nfsm_subs.h"
67#include "nfsiom.h"
68
69/* Defs */
70#define TRUE 1
71#define FALSE 0
72
73/*
74 * Global vfs data structures for nfs
75 */
76struct vnodeops nfsv2_vnodeops = {
77 nfs_lookup, /* lookup */
78 nfs_create, /* create */
79 nfs_mknod, /* mknod */
80 nfs_open, /* open */
81 nfs_close, /* close */
82 nfs_access, /* access */
83 nfs_getattr, /* getattr */
84 nfs_setattr, /* setattr */
85 nfs_read, /* read */
86 nfs_write, /* write */
87 nfs_ioctl, /* ioctl */
88 nfs_select, /* select */
89 nfs_mmap, /* mmap */
90 nfs_fsync, /* fsync */
91 nfs_seek, /* seek */
92 nfs_remove, /* remove */
93 nfs_link, /* link */
94 nfs_rename, /* rename */
95 nfs_mkdir, /* mkdir */
96 nfs_rmdir, /* rmdir */
97 nfs_symlink, /* symlink */
98 nfs_readdir, /* readdir */
99 nfs_readlink, /* readlink */
100 nfs_abortop, /* abortop */
101 nfs_inactive, /* inactive */
102 nfs_reclaim, /* reclaim */
103 nfs_lock, /* lock */
104 nfs_unlock, /* unlock */
105 nfs_bmap, /* bmap */
106 nfs_strategy, /* strategy */
107 nfs_print, /* print */
108 nfs_islocked, /* islocked */
109 nfs_advlock, /* advlock */
110};
111
112/*
113 * Special device vnode ops
114 */
115struct vnodeops spec_nfsv2nodeops = {
116 spec_lookup, /* lookup */
117 spec_create, /* create */
118 spec_mknod, /* mknod */
119 spec_open, /* open */
120 spec_close, /* close */
121 nfs_access, /* access */
122 nfs_getattr, /* getattr */
123 nfs_setattr, /* setattr */
124 spec_read, /* read */
125 spec_write, /* write */
126 spec_ioctl, /* ioctl */
127 spec_select, /* select */
128 spec_mmap, /* mmap */
129 spec_fsync, /* fsync */
130 spec_seek, /* seek */
131 spec_remove, /* remove */
132 spec_link, /* link */
133 spec_rename, /* rename */
134 spec_mkdir, /* mkdir */
135 spec_rmdir, /* rmdir */
136 spec_symlink, /* symlink */
137 spec_readdir, /* readdir */
138 spec_readlink, /* readlink */
139 spec_abortop, /* abortop */
140 nfs_inactive, /* inactive */
141 nfs_reclaim, /* reclaim */
142 nfs_lock, /* lock */
143 nfs_unlock, /* unlock */
144 spec_bmap, /* bmap */
145 spec_strategy, /* strategy */
146 nfs_print, /* print */
147 nfs_islocked, /* islocked */
148 spec_advlock, /* advlock */
149};
150
151#ifdef FIFO
152struct vnodeops fifo_nfsv2nodeops = {
153 fifo_lookup, /* lookup */
154 fifo_create, /* create */
155 fifo_mknod, /* mknod */
156 fifo_open, /* open */
157 fifo_close, /* close */
158 nfs_access, /* access */
159 nfs_getattr, /* getattr */
160 nfs_setattr, /* setattr */
161 fifo_read, /* read */
162 fifo_write, /* write */
163 fifo_ioctl, /* ioctl */
164 fifo_select, /* select */
165 fifo_mmap, /* mmap */
166 fifo_fsync, /* fsync */
167 fifo_seek, /* seek */
168 fifo_remove, /* remove */
169 fifo_link, /* link */
170 fifo_rename, /* rename */
171 fifo_mkdir, /* mkdir */
172 fifo_rmdir, /* rmdir */
173 fifo_symlink, /* symlink */
174 fifo_readdir, /* readdir */
175 fifo_readlink, /* readlink */
176 fifo_abortop, /* abortop */
177 nfs_inactive, /* inactive */
178 nfs_reclaim, /* reclaim */
179 nfs_lock, /* lock */
180 nfs_unlock, /* unlock */
181 fifo_bmap, /* bmap */
182 fifo_badop, /* strategy */
183 nfs_print, /* print */
184 nfs_islocked, /* islocked */
185 fifo_advlock, /* advlock */
186};
187#endif /* FIFO */
188
189/*
190 * Global vars
191 */
192extern u_long nfs_procids[NFS_NPROCS];
193extern u_long nfs_prog, nfs_vers;
194extern char nfsiobuf[MAXPHYS+NBPG];
195struct buf nfs_bqueue; /* Queue head for nfsiod's */
196struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
197int nfs_numasync = 0;
198
199/*
200 * nfs null call from vfs.
201 */
202nfs_null(vp, cred, p)
203 struct vnode *vp;
204 struct ucred *cred;
205 struct proc *p;
206{
207 caddr_t bpos, dpos;
208 u_long xid;
209 int error = 0;
210 struct mbuf *mreq, *mrep, *md, *mb;
211
212 nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0);
213 nfsm_request(vp, NFSPROC_NULL, p, 0);
214 nfsm_reqdone;
215 return (error);
216}
217
218/*
219 * nfs access vnode op.
220 * Essentially just get vattr and then imitate iaccess()
221 */
222nfs_access(vp, mode, cred, p)
223 struct vnode *vp;
224 int mode;
225 register struct ucred *cred;
226 struct proc *p;
227{
228 register struct vattr *vap;
229 register gid_t *gp;
230 struct vattr vattr;
231 register int i;
232 int error;
233
234 /*
235 * If you're the super-user,
236 * you always get access.
237 */
238 if (cred->cr_uid == 0)
239 return (0);
240 vap = &vattr;
241 if (error = nfs_dogetattr(vp, vap, cred, 0, p))
242 return (error);
243 /*
244 * Access check is based on only one of owner, group, public.
245 * If not owner, then check group. If not a member of the
246 * group, then check public access.
247 */
248 if (cred->cr_uid != vap->va_uid) {
249 mode >>= 3;
250 gp = cred->cr_groups;
251 for (i = 0; i < cred->cr_ngroups; i++, gp++)
252 if (vap->va_gid == *gp)
253 goto found;
254 mode >>= 3;
255found:
256 ;
257 }
258 if ((vap->va_mode & mode) != 0)
259 return (0);
260 return (EACCES);
261}
262
263/*
264 * nfs open vnode op
265 * Just check to see if the type is ok
266 */
267/* ARGSUSED */
268nfs_open(vp, mode, cred, p)
269 struct vnode *vp;
270 int mode;
271 struct ucred *cred;
272 struct proc *p;
273{
274 register enum vtype vtyp;
275
276 vtyp = vp->v_type;
277 if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK)
278 return (0);
279 else
280 return (EACCES);
281}
282
283/*
284 * nfs close vnode op
285 * For reg files, invalidate any buffer cache entries.
286 */
287/* ARGSUSED */
288nfs_close(vp, fflags, cred, p)
289 register struct vnode *vp;
290 int fflags;
291 struct ucred *cred;
292 struct proc *p;
293{
294 register struct nfsnode *np = VTONFS(vp);
295 int error = 0;
296
297 if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) {
298 nfs_lock(vp);
299 np->n_flag &= ~NMODIFIED;
300 vinvalbuf(vp, TRUE);
301 np->n_attrstamp = 0;
302 if (np->n_flag & NWRITEERR) {
303 np->n_flag &= ~NWRITEERR;
304 error = np->n_error;
305 }
306 nfs_unlock(vp);
307 }
308 return (error);
309}
310
311/*
312 * nfs getattr call from vfs.
313 */
314nfs_getattr(vp, vap, cred, p)
315 register struct vnode *vp;
316 struct vattr *vap;
317 struct ucred *cred;
318 struct proc *p;
319{
320 return (nfs_dogetattr(vp, vap, cred, 0, p));
321}
322
323nfs_dogetattr(vp, vap, cred, tryhard, p)
324 register struct vnode *vp;
325 struct vattr *vap;
326 struct ucred *cred;
327 int tryhard;
328 struct proc *p;
329{
330 register caddr_t cp;
331 register long t1;
332 caddr_t bpos, dpos;
333 u_long xid;
334 int error = 0;
335 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
336
337 /* First look in the cache.. */
338 if (nfs_getattrcache(vp, vap) == 0)
339 return (0);
340 nfsstats.rpccnt[NFSPROC_GETATTR]++;
341 nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH);
342 nfsm_fhtom(vp);
343 nfsm_request(vp, NFSPROC_GETATTR, p, tryhard);
344 nfsm_loadattr(vp, vap);
345 nfsm_reqdone;
346 return (error);
347}
348
349/*
350 * nfs setattr call.
351 */
352nfs_setattr(vp, vap, cred, p)
353 register struct vnode *vp;
354 register struct vattr *vap;
355 struct ucred *cred;
356 struct proc *p;
357{
358 register struct nfsv2_sattr *sp;
359 register caddr_t cp;
360 register long t1;
361 caddr_t bpos, dpos;
362 u_long xid;
363 int error = 0;
364 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
365 struct nfsnode *np;
366
367 nfsstats.rpccnt[NFSPROC_SETATTR]++;
368 nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR);
369 nfsm_fhtom(vp);
370 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
371 if (vap->va_mode == 0xffff)
372 sp->sa_mode = VNOVAL;
373 else
374 sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode);
375 if (vap->va_uid == 0xffff)
376 sp->sa_uid = VNOVAL;
377 else
378 sp->sa_uid = txdr_unsigned(vap->va_uid);
379 if (vap->va_gid == 0xffff)
380 sp->sa_gid = VNOVAL;
381 else
382 sp->sa_gid = txdr_unsigned(vap->va_gid);
383 sp->sa_size = txdr_unsigned(vap->va_size);
384 sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec);
385 sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags);
386 txdr_time(&vap->va_mtime, &sp->sa_mtime);
387 if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
388 vap->va_atime.tv_sec != VNOVAL) {
389 np = VTONFS(vp);
390 if (np->n_flag & NMODIFIED) {
391 np->n_flag &= ~NMODIFIED;
392 if (vap->va_size == 0)
393 vinvalbuf(vp, FALSE);
394 else
395 vinvalbuf(vp, TRUE);
396 np->n_attrstamp = 0;
397 }
398 }
399 nfsm_request(vp, NFSPROC_SETATTR, p, 1);
400 nfsm_loadattr(vp, (struct vattr *)0);
401 /* should we fill in any vap fields ?? */
402 nfsm_reqdone;
403 return (error);
404}
405
406/*
407 * nfs lookup call, one step at a time...
408 * First look in cache
409 * If not found, unlock the directory nfsnode and do the rpc
410 */
411nfs_lookup(vp, ndp, p)
412 register struct vnode *vp;
413 register struct nameidata *ndp;
414 struct proc *p;
415{
416 register struct vnode *vdp;
417 register u_long *tl;
418 register caddr_t cp;
419 register long t1, t2;
420 caddr_t bpos, dpos, cp2;
421 u_long xid;
422 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
423 struct vnode *newvp;
424 long len;
425 nfsv2fh_t *fhp;
426 struct nfsnode *np;
427 int lockparent, wantparent, flag, error = 0;
428
429 ndp->ni_dvp = vp;
430 ndp->ni_vp = NULL;
431 if (vp->v_type != VDIR)
432 return (ENOTDIR);
433 lockparent = ndp->ni_nameiop & LOCKPARENT;
434 flag = ndp->ni_nameiop & OPMASK;
435 wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT);
436 if ((error = cache_lookup(ndp)) && error != ENOENT) {
437 struct vattr vattr;
438 int vpid;
439
440 vdp = ndp->ni_vp;
441 vpid = vdp->v_id;
442 /*
443 * See the comment starting `Step through' in ufs/ufs_lookup.c
444 * for an explanation of the locking protocol
445 */
446 if (vp == vdp) {
447 VREF(vdp);
448 error = 0;
449 } else if (ndp->ni_isdotdot) {
450 nfs_unlock(vp);
451 error = vget(vdp);
452 if (!error && lockparent && *ndp->ni_next == '\0')
453 nfs_lock(vp);
454 } else {
455 error = vget(vdp);
456 if (!lockparent || error || *ndp->ni_next != '\0')
457 nfs_unlock(vp);
458 }
459 if (!error) {
460 if (vpid == vdp->v_id) {
461 if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0, p)&&
462 vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) {
463 nfsstats.lookupcache_hits++;
464 if (flag != LOOKUP && *ndp->ni_next == 0)
465 ndp->ni_nameiop |= SAVENAME;
466 return (0);
467 }
468 cache_purge(vdp);
469 }
470 nfs_nput(vdp);
471 if (lockparent && vdp != vp && *ndp->ni_next == '\0')
472 nfs_unlock(vp);
473 }
474 ndp->ni_vp = NULLVP;
475 } else
476 nfs_unlock(vp);
477 error = 0;
478 nfsstats.lookupcache_misses++;
479 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
480 len = ndp->ni_namelen;
481 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
482 nfsm_fhtom(vp);
483 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN);
484 nfsm_request(vp, NFSPROC_LOOKUP, p, 0);
485nfsmout:
486 if (error) {
487 if (lockparent || (flag != CREATE && flag != RENAME) ||
488 *ndp->ni_next != 0)
489 nfs_lock(vp);
490 if (flag != LOOKUP && *ndp->ni_next == 0)
491 ndp->ni_nameiop |= SAVENAME;
492 return (error);
493 }
494 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH);
495
496 /*
497 * Handle DELETE and RENAME cases...
498 */
499 if (flag == DELETE && *ndp->ni_next == 0) {
500 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
501 VREF(vp);
502 newvp = vp;
503 np = VTONFS(vp);
504 } else {
505 if (error = nfs_nget(vp->v_mount, fhp, &np)) {
506 nfs_lock(vp);
507 m_freem(mrep);
508 return (error);
509 }
510 newvp = NFSTOV(np);
511 }
512 if (error =
513 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
514 nfs_lock(vp);
515 if (newvp != vp)
516 nfs_nput(newvp);
517 else
518 vrele(vp);
519 m_freem(mrep);
520 return (error);
521 }
522 ndp->ni_vp = newvp;
523 if (lockparent || vp == newvp)
524 nfs_lock(vp);
525 m_freem(mrep);
526 ndp->ni_nameiop |= SAVENAME;
527 return (0);
528 }
529
530 if (flag == RENAME && wantparent && *ndp->ni_next == 0) {
531 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
532 nfs_lock(vp);
533 m_freem(mrep);
534 return (EISDIR);
535 }
536 if (error = nfs_nget(vp->v_mount, fhp, &np)) {
537 nfs_lock(vp);
538 m_freem(mrep);
539 return (error);
540 }
541 newvp = NFSTOV(np);
542 if (error =
543 nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
544 nfs_lock(vp);
545 nfs_nput(newvp);
546 m_freem(mrep);
547 return (error);
548 }
549 ndp->ni_vp = newvp;
550 if (lockparent)
551 nfs_lock(vp);
552 m_freem(mrep);
553 ndp->ni_nameiop |= SAVENAME;
554 return (0);
555 }
556
557 if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
558 VREF(vp);
559 newvp = vp;
560 np = VTONFS(vp);
561 } else if (ndp->ni_isdotdot) {
562 if (error = nfs_nget(vp->v_mount, fhp, &np)) {
563 nfs_lock(vp);
564 m_freem(mrep);
565 return (error);
566 }
567 newvp = NFSTOV(np);
568 } else {
569 if (error = nfs_nget(vp->v_mount, fhp, &np)) {
570 nfs_lock(vp);
571 m_freem(mrep);
572 return (error);
573 }
574 newvp = NFSTOV(np);
575 }
576 if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
577 nfs_lock(vp);
578 if (newvp != vp)
579 nfs_nput(newvp);
580 else
581 vrele(vp);
582 m_freem(mrep);
583 return (error);
584 }
585 m_freem(mrep);
586
587 if (vp == newvp || (lockparent && *ndp->ni_next == '\0'))
588 nfs_lock(vp);
589 ndp->ni_vp = newvp;
590 if (flag != LOOKUP && *ndp->ni_next == 0)
591 ndp->ni_nameiop |= SAVENAME;
592 if (error == 0 && ndp->ni_makeentry) {
593 np->n_ctime = np->n_vattr.va_ctime.tv_sec;
594 cache_enter(ndp);
595 }
596 return (error);
597}
598
599/*
600 * nfs read call.
601 * Just call nfs_bioread() to do the work.
602 */
603nfs_read(vp, uiop, ioflag, cred)
604 register struct vnode *vp;
605 struct uio *uiop;
606 int ioflag;
607 struct ucred *cred;
608{
609 if (vp->v_type != VREG)
610 return (EPERM);
611 return (nfs_bioread(vp, uiop, ioflag, cred));
612}
613
614/*
615 * nfs readlink call
616 */
617nfs_readlink(vp, uiop, cred)
618 struct vnode *vp;
619 struct uio *uiop;
620 struct ucred *cred;
621{
622 if (vp->v_type != VLNK)
623 return (EPERM);
624 return (nfs_bioread(vp, uiop, 0, cred));
625}
626
627/*
628 * Do a readlink rpc.
629 * Called by nfs_doio() from below the buffer cache.
630 */
631nfs_readlinkrpc(vp, uiop, cred)
632 register struct vnode *vp;
633 struct uio *uiop;
634 struct ucred *cred;
635{
636 register u_long *tl;
637 register caddr_t cp;
638 register long t1;
639 caddr_t bpos, dpos, cp2;
640 u_long xid;
641 int error = 0;
642 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
643 long len;
644
645 nfsstats.rpccnt[NFSPROC_READLINK]++;
646 nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH);
647 nfsm_fhtom(vp);
648 nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, 0);
649 nfsm_strsiz(len, NFS_MAXPATHLEN);
650 nfsm_mtouio(uiop, len);
651 nfsm_reqdone;
652 return (error);
653}
654
655/*
656 * nfs read rpc call
657 * Ditto above
658 */
659nfs_readrpc(vp, uiop, cred)
660 register struct vnode *vp;
661 struct uio *uiop;
662 struct ucred *cred;
663{
664 register u_long *tl;
665 register caddr_t cp;
666 register long t1;
667 caddr_t bpos, dpos, cp2;
668 u_long xid;
669 int error = 0;
670 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
671 struct nfsmount *nmp;
672 long len, retlen, tsiz;
673
674 nmp = VFSTONFS(vp->v_mount);
675 tsiz = uiop->uio_resid;
676 while (tsiz > 0) {
677 nfsstats.rpccnt[NFSPROC_READ]++;
678 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
679 nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3);
680 nfsm_fhtom(vp);
681 nfsm_build(tl, u_long *, NFSX_UNSIGNED*3);
682 *tl++ = txdr_unsigned(uiop->uio_offset);
683 *tl++ = txdr_unsigned(len);
684 *tl = 0;
685 nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, 1);
686 nfsm_loadattr(vp, (struct vattr *)0);
687 nfsm_strsiz(retlen, nmp->nm_rsize);
688 nfsm_mtouio(uiop, retlen);
689 m_freem(mrep);
690 if (retlen < len)
691 tsiz = 0;
692 else
693 tsiz -= len;
694 }
695nfsmout:
696 return (error);
697}
698
699/*
700 * nfs write call
701 */
702nfs_writerpc(vp, uiop, cred)
703 register struct vnode *vp;
704 struct uio *uiop;
705 struct ucred *cred;
706{
707 register u_long *tl;
708 register caddr_t cp;
709 register long t1;
710 caddr_t bpos, dpos;
711 u_long xid;
712 int error = 0;
713 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
714 struct nfsmount *nmp;
715 long len, tsiz;
716
717 nmp = VFSTONFS(vp->v_mount);
718 tsiz = uiop->uio_resid;
719 while (tsiz > 0) {
720 nfsstats.rpccnt[NFSPROC_WRITE]++;
721 len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
722 nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred,
723 NFSX_FH+NFSX_UNSIGNED*4);
724 nfsm_fhtom(vp);
725 nfsm_build(tl, u_long *, NFSX_UNSIGNED*4);
726 *(tl+1) = txdr_unsigned(uiop->uio_offset);
727 *(tl+3) = txdr_unsigned(len);
728 nfsm_uiotom(uiop, len);
729 nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, 1);
730 nfsm_loadattr(vp, (struct vattr *)0);
731 m_freem(mrep);
732 tsiz -= len;
733 }
734nfsmout:
735 return (error);
736}
737
738/*
739 * nfs mknod call
740 * This is a kludge. Use a create rpc but with the IFMT bits of the mode
741 * set to specify the file type and the size field for rdev.
742 */
743/* ARGSUSED */
744nfs_mknod(ndp, vap, cred, p)
745 struct nameidata *ndp;
746 struct ucred *cred;
747 register struct vattr *vap;
748 struct proc *p;
749{
750 register struct nfsv2_sattr *sp;
751 register u_long *tl;
752 register caddr_t cp;
753 register long t1, t2;
754 caddr_t bpos, dpos;
755 u_long xid;
756 int error = 0;
757 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
758 u_long rdev;
759
760 if (vap->va_type == VCHR || vap->va_type == VBLK)
761 rdev = txdr_unsigned(vap->va_rdev);
762#ifdef FIFO
763 else if (vap->va_type == VFIFO)
764 rdev = 0xffffffff;
765#endif /* FIFO */
766 else {
767 VOP_ABORTOP(ndp);
768 vput(ndp->ni_dvp);
769 return (EOPNOTSUPP);
770 }
771 nfsstats.rpccnt[NFSPROC_CREATE]++;
772 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred,
773 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR);
774 nfsm_fhtom(ndp->ni_dvp);
775 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
776 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
777 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode);
778 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
779 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
780 sp->sa_size = rdev;
781 /* or should these be VNOVAL ?? */
782 txdr_time(&vap->va_atime, &sp->sa_atime);
783 txdr_time(&vap->va_mtime, &sp->sa_mtime);
784 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1);
785 nfsm_reqdone;
786 FREE(ndp->ni_pnbuf, M_NAMEI);
787 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
788 nfs_nput(ndp->ni_dvp);
789 return (error);
790}
791
792/*
793 * nfs file create call
794 */
795nfs_create(ndp, vap, p)
796 register struct nameidata *ndp;
797 register struct vattr *vap;
798 struct proc *p;
799{
800 register struct nfsv2_sattr *sp;
801 register u_long *tl;
802 register caddr_t cp;
803 register long t1, t2;
804 caddr_t bpos, dpos, cp2;
805 u_long xid;
806 int error = 0;
807 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
808
809 nfsstats.rpccnt[NFSPROC_CREATE]++;
810 nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred,
811 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_SATTR);
812 nfsm_fhtom(ndp->ni_dvp);
813 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
814 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
815 sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode);
816 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
817 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
818 sp->sa_size = txdr_unsigned(0);
819 /* or should these be VNOVAL ?? */
820 txdr_time(&vap->va_atime, &sp->sa_atime);
821 txdr_time(&vap->va_mtime, &sp->sa_mtime);
822 nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, p, 1);
823 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
824 nfsm_reqdone;
825 FREE(ndp->ni_pnbuf, M_NAMEI);
826 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
827 nfs_nput(ndp->ni_dvp);
828 return (error);
829}
830
831/*
832 * nfs file remove call
833 * To try and make nfs semantics closer to ufs semantics, a file that has
834 * other processes using the vnode is renamed instead of removed and then
835 * removed later on the last close.
836 * - If v_usecount > 1
837 * If a rename is not already in the works
838 * call nfs_sillyrename() to set it up
839 * else
840 * do the remove rpc
841 */
842nfs_remove(ndp, p)
843 register struct nameidata *ndp;
844 struct proc *p;
845{
846 register struct vnode *vp = ndp->ni_vp;
847 register struct nfsnode *np = VTONFS(ndp->ni_vp);
848 register u_long *tl;
849 register caddr_t cp;
850 register long t1, t2;
851 caddr_t bpos, dpos;
852 u_long xid;
853 int error = 0;
854 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
855
856 if (vp->v_usecount > 1) {
857 if (!np->n_sillyrename)
858 error = nfs_sillyrename(ndp, p);
859 } else {
860 nfsstats.rpccnt[NFSPROC_REMOVE]++;
861 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred,
862 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen));
863 nfsm_fhtom(ndp->ni_dvp);
864 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
865 nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, p, 1);
866 nfsm_reqdone;
867 FREE(ndp->ni_pnbuf, M_NAMEI);
868 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
869 /*
870 * Kludge City: If the first reply to the remove rpc is lost..
871 * the reply to the retransmitted request will be ENOENT
872 * since the file was in fact removed
873 * Therefore, we cheat and return success.
874 */
875 if (error == ENOENT)
876 error = 0;
877 }
878 np->n_attrstamp = 0;
879 if (ndp->ni_dvp == vp)
880 vrele(vp);
881 else
882 nfs_nput(ndp->ni_dvp);
883 nfs_nput(vp);
884 return (error);
885}
886
887/*
888 * nfs file remove rpc called from nfs_inactive
889 */
890nfs_removeit(sp, p)
891 register struct sillyrename *sp;
892 struct proc *p;
893{
894 register u_long *tl;
895 register caddr_t cp;
896 register long t1, t2;
897 caddr_t bpos, dpos;
898 u_long xid;
899 int error = 0;
900 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
901
902 nfsstats.rpccnt[NFSPROC_REMOVE]++;
903 nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], sp->s_cred,
904 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(sp->s_namlen));
905 nfsm_fhtom(sp->s_dvp);
906 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN);
907 nfsm_request(sp->s_dvp, NFSPROC_REMOVE, p, 1);
908 nfsm_reqdone;
909 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED;
910 return (error);
911}
912
913/*
914 * nfs file rename call
915 */
916nfs_rename(sndp, tndp, p)
917 register struct nameidata *sndp, *tndp;
918 struct proc *p;
919{
920 register u_long *tl;
921 register caddr_t cp;
922 register long t1, t2;
923 caddr_t bpos, dpos;
924 u_long xid;
925 int error = 0;
926 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
927
928 nfsstats.rpccnt[NFSPROC_RENAME]++;
929 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred,
930 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) +
931 nfsm_rndup(tndp->ni_namelen)); /* or sndp->ni_cred?*/
932 nfsm_fhtom(sndp->ni_dvp);
933 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN);
934 nfsm_fhtom(tndp->ni_dvp);
935 nfsm_strtom(tndp->ni_ptr, tndp->ni_namelen, NFS_MAXNAMLEN);
936 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1);
937 nfsm_reqdone;
938 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED;
939 VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED;
940 if (sndp->ni_vp->v_type == VDIR) {
941 if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR)
942 cache_purge(tndp->ni_dvp);
943 cache_purge(sndp->ni_dvp);
944 }
945 if (tndp->ni_dvp == tndp->ni_vp)
946 vrele(tndp->ni_dvp);
947 else
948 vput(tndp->ni_dvp);
949 if (tndp->ni_vp)
950 vput(tndp->ni_vp);
951 vrele(sndp->ni_dvp);
952 vrele(sndp->ni_vp);
953 /*
954 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
955 */
956 if (error == ENOENT)
957 error = 0;
958 return (error);
959}
960
961/*
962 * nfs file rename rpc called from nfs_remove() above
963 */
964nfs_renameit(sndp, sp, p)
965 register struct nameidata *sndp;
966 register struct sillyrename *sp;
967 struct proc *p;
968{
969 register u_long *tl;
970 register caddr_t cp;
971 register long t1, t2;
972 caddr_t bpos, dpos;
973 u_long xid;
974 int error = 0;
975 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
976
977 nfsstats.rpccnt[NFSPROC_RENAME]++;
978 nfsm_reqhead(nfs_procids[NFSPROC_RENAME], sp->s_cred,
979 (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_namelen) +
980 nfsm_rndup(sp->s_namlen)); /* or sndp->ni_cred?*/
981 nfsm_fhtom(sndp->ni_dvp);
982 nfsm_strtom(sndp->ni_ptr, sndp->ni_namelen, NFS_MAXNAMLEN);
983 nfsm_fhtom(sp->s_dvp);
984 nfsm_strtom(sp->s_name, sp->s_namlen, NFS_MAXNAMLEN);
985 nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, p, 1);
986 nfsm_reqdone;
987 FREE(sndp->ni_pnbuf, M_NAMEI);
988 VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED;
989 VTONFS(sp->s_dvp)->n_flag |= NMODIFIED;
990 return (error);
991}
992
993/*
994 * nfs hard link create call
995 */
996nfs_link(vp, ndp, p)
997 register struct vnode *vp;
998 register struct nameidata *ndp;
999 struct proc *p;
1000{
1001 register u_long *tl;
1002 register caddr_t cp;
1003 register long t1, t2;
1004 caddr_t bpos, dpos;
1005 u_long xid;
1006 int error = 0;
1007 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1008
1009 if (ndp->ni_dvp != vp)
1010 nfs_lock(vp);
1011 nfsstats.rpccnt[NFSPROC_LINK]++;
1012 nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred,
1013 NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen));
1014 nfsm_fhtom(vp);
1015 nfsm_fhtom(ndp->ni_dvp);
1016 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
1017 nfsm_request(vp, NFSPROC_LINK, p, 1);
1018 nfsm_reqdone;
1019 FREE(ndp->ni_pnbuf, M_NAMEI);
1020 VTONFS(vp)->n_attrstamp = 0;
1021 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1022 if (ndp->ni_dvp != vp)
1023 nfs_unlock(vp);
1024 nfs_nput(ndp->ni_dvp);
1025 /*
1026 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1027 */
1028 if (error == EEXIST)
1029 error = 0;
1030 return (error);
1031}
1032
1033/*
1034 * nfs symbolic link create call
1035 */
1036nfs_symlink(ndp, vap, nm, p)
1037 struct nameidata *ndp;
1038 struct vattr *vap;
1039 char *nm; /* is this the path ?? */
1040 struct proc *p;
1041{
1042 register struct nfsv2_sattr *sp;
1043 register u_long *tl;
1044 register caddr_t cp;
1045 register long t1, t2;
1046 caddr_t bpos, dpos;
1047 u_long xid;
1048 int error = 0;
1049 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1050
1051 nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1052 nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred,
1053 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen)+NFSX_UNSIGNED);
1054 nfsm_fhtom(ndp->ni_dvp);
1055 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
1056 nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN);
1057 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
1058 sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode);
1059 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
1060 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
1061 sp->sa_size = txdr_unsigned(VNOVAL);
1062 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */
1063 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */
1064 nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, p, 1);
1065 nfsm_reqdone;
1066 FREE(ndp->ni_pnbuf, M_NAMEI);
1067 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1068 nfs_nput(ndp->ni_dvp);
1069 /*
1070 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1071 */
1072 if (error == EEXIST)
1073 error = 0;
1074 return (error);
1075}
1076
1077/*
1078 * nfs make dir call
1079 */
1080nfs_mkdir(ndp, vap, p)
1081 register struct nameidata *ndp;
1082 struct vattr *vap;
1083 struct proc *p;
1084{
1085 register struct nfsv2_sattr *sp;
1086 register u_long *tl;
1087 register caddr_t cp;
1088 register long t1, t2;
1089 register int len;
1090 caddr_t bpos, dpos, cp2;
1091 u_long xid;
1092 int error = 0, firsttry = 1;
1093 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1094
1095 len = ndp->ni_namelen;
1096 nfsstats.rpccnt[NFSPROC_MKDIR]++;
1097 nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred,
1098 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR);
1099 nfsm_fhtom(ndp->ni_dvp);
1100 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN);
1101 nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
1102 sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode);
1103 sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
1104 sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
1105 sp->sa_size = txdr_unsigned(VNOVAL);
1106 txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */
1107 txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */
1108 nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, p, 1);
1109 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
1110 nfsm_reqdone;
1111 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1112 /*
1113 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1114 * if we can succeed in looking up the directory.
1115 * "firsttry" is necessary since the macros may "goto nfsmout" which
1116 * is above the if on errors. (Ugh)
1117 */
1118 if (error == EEXIST && firsttry) {
1119 firsttry = 0;
1120 error = 0;
1121 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1122 ndp->ni_vp = NULL;
1123 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred,
1124 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
1125 nfsm_fhtom(ndp->ni_dvp);
1126 nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN);
1127 nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, p, 1);
1128 nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
1129 if (ndp->ni_vp->v_type != VDIR) {
1130 vput(ndp->ni_vp);
1131 error = EEXIST;
1132 }
1133 m_freem(mrep);
1134 }
1135 FREE(ndp->ni_pnbuf, M_NAMEI);
1136 nfs_nput(ndp->ni_dvp);
1137 return (error);
1138}
1139
1140/*
1141 * nfs remove directory call
1142 */
1143nfs_rmdir(ndp, p)
1144 register struct nameidata *ndp;
1145 struct proc *p;
1146{
1147 register u_long *tl;
1148 register caddr_t cp;
1149 register long t1, t2;
1150 caddr_t bpos, dpos;
1151 u_long xid;
1152 int error = 0;
1153 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1154
1155 if (ndp->ni_dvp == ndp->ni_vp) {
1156 vrele(ndp->ni_dvp);
1157 nfs_nput(ndp->ni_dvp);
1158 return (EINVAL);
1159 }
1160 nfsstats.rpccnt[NFSPROC_RMDIR]++;
1161 nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred,
1162 NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_namelen));
1163 nfsm_fhtom(ndp->ni_dvp);
1164 nfsm_strtom(ndp->ni_ptr, ndp->ni_namelen, NFS_MAXNAMLEN);
1165 nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, p, 1);
1166 nfsm_reqdone;
1167 FREE(ndp->ni_pnbuf, M_NAMEI);
1168 VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1169 cache_purge(ndp->ni_dvp);
1170 cache_purge(ndp->ni_vp);
1171 nfs_nput(ndp->ni_vp);
1172 nfs_nput(ndp->ni_dvp);
1173 /*
1174 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
1175 */
1176 if (error == ENOENT)
1177 error = 0;
1178 return (error);
1179}
1180
1181/*
1182 * nfs readdir call
1183 * Although cookie is defined as opaque, I translate it to/from net byte
1184 * order so that it looks more sensible. This appears consistent with the
1185 * Ultrix implementation of NFS.
1186 */
1187nfs_readdir(vp, uiop, cred, eofflagp)
1188 register struct vnode *vp;
1189 struct uio *uiop;
1190 struct ucred *cred;
1191 int *eofflagp;
1192{
1193 register struct nfsnode *np = VTONFS(vp);
1194 int tresid, error;
1195 struct vattr vattr;
1196
1197 if (vp->v_type != VDIR)
1198 return (EPERM);
1199 /*
1200 * First, check for hit on the EOF offset cache
1201 */
1202 if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset &&
1203 (np->n_flag & NMODIFIED) == 0 &&
1204 nfs_dogetattr(vp, &vattr, cred, 0, uiop->uio_procp) == 0 &&
1205 np->n_mtime == vattr.va_mtime.tv_sec) {
1206 *eofflagp = 1;
1207 nfsstats.direofcache_hits++;
1208 return (0);
1209 }
1210
1211 /*
1212 * Call nfs_bioread() to do the real work.
1213 */
1214 tresid = uiop->uio_resid;
1215 error = nfs_bioread(vp, uiop, 0, cred);
1216
1217 if (!error && uiop->uio_resid == tresid) {
1218 *eofflagp = 1;
1219 nfsstats.direofcache_misses++;
1220 } else
1221 *eofflagp = 0;
1222 return (error);
1223}
1224
1225/*
1226 * Readdir rpc call.
1227 * Called from below the buffer cache by nfs_doio().
1228 */
1229nfs_readdirrpc(vp, uiop, cred)
1230 register struct vnode *vp;
1231 struct uio *uiop;
1232 struct ucred *cred;
1233{
1234 register long len;
1235 register struct direct *dp;
1236 register u_long *tl;
1237 register caddr_t cp;
1238 register long t1;
1239 long tlen, lastlen;
1240 caddr_t bpos, dpos, cp2;
1241 u_long xid;
1242 int error = 0;
1243 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1244 struct mbuf *md2;
1245 caddr_t dpos2;
1246 int siz;
1247 int more_dirs = 1;
1248 off_t off, savoff;
1249 struct direct *savdp;
1250 struct nfsmount *nmp;
1251 struct nfsnode *np = VTONFS(vp);
1252 long tresid;
1253
1254 nmp = VFSTONFS(vp->v_mount);
1255 tresid = uiop->uio_resid;
1256 /*
1257 * Loop around doing readdir rpc's of size uio_resid or nm_rsize,
1258 * whichever is smaller, truncated to a multiple of NFS_DIRBLKSIZ.
1259 * The stopping criteria is EOF or buffer full.
1260 */
1261 while (more_dirs && uiop->uio_resid >= NFS_DIRBLKSIZ) {
1262 nfsstats.rpccnt[NFSPROC_READDIR]++;
1263 nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid);
1264 nfsm_fhtom(vp);
1265 nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED);
1266 *tl++ = txdr_unsigned(uiop->uio_offset);
1267 *tl = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ?
1268 nmp->nm_rsize : uiop->uio_resid) & ~(NFS_DIRBLKSIZ-1));
1269 nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, 0);
1270 siz = 0;
1271 nfsm_disect(tl, u_long *, NFSX_UNSIGNED);
1272 more_dirs = fxdr_unsigned(int, *tl);
1273
1274 /* Save the position so that we can do nfsm_mtouio() later */
1275 dpos2 = dpos;
1276 md2 = md;
1277
1278 /* loop thru the dir entries, doctoring them to 4bsd form */
1279 off = uiop->uio_offset;
1280#ifdef lint
1281 dp = (struct direct *)0;
1282#endif /* lint */
1283 while (more_dirs && siz < uiop->uio_resid) {
1284 savoff = off; /* Hold onto offset and dp */
1285 savdp = dp;
1286 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED);
1287 dp = (struct direct *)tl;
1288 dp->d_ino = fxdr_unsigned(u_long, *tl++);
1289 len = fxdr_unsigned(int, *tl);
1290 if (len <= 0 || len > NFS_MAXNAMLEN) {
1291 error = EBADRPC;
1292 m_freem(mrep);
1293 goto nfsmout;
1294 }
1295 dp->d_namlen = (u_short)len;
1296 nfsm_adv(len); /* Point past name */
1297 tlen = nfsm_rndup(len);
1298 /*
1299 * This should not be necessary, but some servers have
1300 * broken XDR such that these bytes are not null filled.
1301 */
1302 if (tlen != len) {
1303 *dpos = '\0'; /* Null-terminate */
1304 nfsm_adv(tlen - len);
1305 len = tlen;
1306 }
1307 nfsm_disecton(tl, u_long *, 2*NFSX_UNSIGNED);
1308 off = fxdr_unsigned(off_t, *tl);
1309 *tl++ = 0; /* Ensures null termination of name */
1310 more_dirs = fxdr_unsigned(int, *tl);
1311 dp->d_reclen = len+4*NFSX_UNSIGNED;
1312 siz += dp->d_reclen;
1313 }
1314 /*
1315 * If at end of rpc data, get the eof boolean
1316 */
1317 if (!more_dirs) {
1318 nfsm_disecton(tl, u_long *, NFSX_UNSIGNED);
1319 more_dirs = (fxdr_unsigned(int, *tl) == 0);
1320
1321 /*
1322 * If at EOF, cache directory offset
1323 */
1324 if (!more_dirs)
1325 np->n_direofoffset = off;
1326 }
1327 /*
1328 * If there is too much to fit in the data buffer, use savoff and
1329 * savdp to trim off the last record.
1330 * --> we are not at eof
1331 */
1332 if (siz > uiop->uio_resid) {
1333 off = savoff;
1334 siz -= dp->d_reclen;
1335 dp = savdp;
1336 more_dirs = 0; /* Paranoia */
1337 }
1338 if (siz > 0) {
1339 lastlen = dp->d_reclen;
1340 md = md2;
1341 dpos = dpos2;
1342 nfsm_mtouio(uiop, siz);
1343 uiop->uio_offset = off;
1344 } else
1345 more_dirs = 0; /* Ugh, never happens, but in case.. */
1346 m_freem(mrep);
1347 }
1348 /*
1349 * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ
1350 * by increasing d_reclen for the last record.
1351 */
1352 if (uiop->uio_resid < tresid) {
1353 len = uiop->uio_resid & (NFS_DIRBLKSIZ - 1);
1354 if (len > 0) {
1355 dp = (struct direct *)
1356 (uiop->uio_iov->iov_base - lastlen);
1357 dp->d_reclen += len;
1358 uiop->uio_iov->iov_base += len;
1359 uiop->uio_iov->iov_len -= len;
1360 uiop->uio_resid -= len;
1361 }
1362 }
1363nfsmout:
1364 return (error);
1365}
1366
1367static char hextoasc[] = "0123456789abcdef";
1368
1369/*
1370 * Silly rename. To make the NFS filesystem that is stateless look a little
1371 * more like the "ufs" a remove of an active vnode is translated to a rename
1372 * to a funny looking filename that is removed by nfs_inactive on the
1373 * nfsnode. There is the potential for another process on a different client
1374 * to create the same funny name between the nfs_lookitup() fails and the
1375 * nfs_rename() completes, but...
1376 */
1377nfs_sillyrename(ndp, p)
1378 register struct nameidata *ndp;
1379 struct proc *p;
1380{
1381 register struct nfsnode *np;
1382 register struct sillyrename *sp;
1383 int error;
1384 short pid;
1385
1386 np = VTONFS(ndp->ni_dvp);
1387 cache_purge(ndp->ni_dvp);
1388 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
1389 M_NFSREQ, M_WAITOK);
1390 bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH);
1391 np = VTONFS(ndp->ni_vp);
1392 sp->s_cred = crdup(ndp->ni_cred);
1393 sp->s_dvp = ndp->ni_dvp;
1394 VREF(sp->s_dvp);
1395
1396 /* Fudge together a funny name */
1397 pid = p->p_pid;
1398 bcopy(".nfsAxxxx4.4", sp->s_name, 13);
1399 sp->s_namlen = 12;
1400 sp->s_name[8] = hextoasc[pid & 0xf];
1401 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf];
1402 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf];
1403 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf];
1404
1405 /* Try lookitups until we get one that isn't there */
1406 while (nfs_lookitup(sp, (nfsv2fh_t *)0, p) == 0) {
1407 sp->s_name[4]++;
1408 if (sp->s_name[4] > 'z') {
1409 error = EINVAL;
1410 goto bad;
1411 }
1412 }
1413 if (error = nfs_renameit(ndp, sp, p))
1414 goto bad;
1415 nfs_lookitup(sp, &np->n_fh, p);
1416 np->n_sillyrename = sp;
1417 return (0);
1418bad:
1419 vrele(sp->s_dvp);
1420 crfree(sp->s_cred);
1421 free((caddr_t)sp, M_NFSREQ);
1422 return (error);
1423}
1424
1425/*
1426 * Look up a file name for silly rename stuff.
1427 * Just like nfs_lookup() except that it doesn't load returned values
1428 * into the nfsnode table.
1429 * If fhp != NULL it copies the returned file handle out
1430 */
1431nfs_lookitup(sp, fhp, p)
1432 register struct sillyrename *sp;
1433 nfsv2fh_t *fhp;
1434 struct proc *p;
1435{
1436 register struct vnode *vp = sp->s_dvp;
1437 register u_long *tl;
1438 register caddr_t cp;
1439 register long t1, t2;
1440 caddr_t bpos, dpos, cp2;
1441 u_long xid;
1442 int error = 0;
1443 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1444 long len;
1445
1446 nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1447 len = sp->s_namlen;
1448 nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], sp->s_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
1449 nfsm_fhtom(vp);
1450 nfsm_strtom(sp->s_name, len, NFS_MAXNAMLEN);
1451 nfsm_request(vp, NFSPROC_LOOKUP, p, 1);
1452 if (fhp != NULL) {
1453 nfsm_disect(cp, caddr_t, NFSX_FH);
1454 bcopy(cp, (caddr_t)fhp, NFSX_FH);
1455 }
1456 nfsm_reqdone;
1457 return (error);
1458}
1459
1460/*
1461 * Kludge City..
1462 * - make nfs_bmap() essentially a no-op that does no translation
1463 * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc
1464 * after mapping the physical addresses into Kernel Virtual space in the
1465 * nfsiobuf area.
1466 * (Maybe I could use the process's page mapping, but I was concerned that
1467 * Kernel Write might not be enabled and also figured copyout() would do
1468 * a lot more work than bcopy() and also it currently happens in the
1469 * context of the swapper process (2).
1470 */
1471nfs_bmap(vp, bn, vpp, bnp)
1472 struct vnode *vp;
1473 daddr_t bn;
1474 struct vnode **vpp;
1475 daddr_t *bnp;
1476{
1477 if (vpp != NULL)
1478 *vpp = vp;
1479 if (bnp != NULL)
1480 *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize);
1481 return (0);
1482}
1483
1484/*
1485 * Strategy routine for phys. i/o
1486 * If the biod's are running, queue a request
1487 * otherwise just call nfs_doio() to get it done
1488 */
1489nfs_strategy(bp)
1490 register struct buf *bp;
1491{
1492 register struct buf *dp;
1493 register int i;
1494 int error = 0;
1495 int fnd = 0;
1496
1497 /*
1498 * Set b_proc. It seems a bit silly to do it here, but since bread()
1499 * doesn't set it, I will.
1500 * Set b_proc == NULL for asynchronous ops, since these may still
1501 * be hanging about after the process terminates.
1502 */
1503 if ((bp->b_flags & B_PHYS) == 0) {
1504 if (bp->b_flags & B_ASYNC)
1505 bp->b_proc = (struct proc *)0;
1506 else
1507 bp->b_proc = curproc;
1508 }
1509 /*
1510 * If the op is asynchronous and an i/o daemon is waiting
1511 * queue the request, wake it up and wait for completion
1512 * otherwise just do it ourselves.
1513 */
1514 if ((bp->b_flags & B_ASYNC) == 0 || nfs_numasync == 0)
1515 return (nfs_doio(bp));
1516 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
1517 if (nfs_iodwant[i]) {
1518 dp = &nfs_bqueue;
1519 if (dp->b_actf == NULL) {
1520 dp->b_actl = bp;
1521 bp->b_actf = dp;
1522 } else {
1523 dp->b_actf->b_actl = bp;
1524 bp->b_actf = dp->b_actf;
1525 }
1526 dp->b_actf = bp;
1527 bp->b_actl = dp;
1528 fnd++;
1529 wakeup((caddr_t)&nfs_iodwant[i]);
1530 break;
1531 }
1532 }
1533 if (!fnd)
1534 error = nfs_doio(bp);
1535 return (error);
1536}
1537
1538/*
1539 * Fun and games with i/o
1540 * Essentially play ubasetup() and disk interrupt service routine by
1541 * mapping the data buffer into kernel virtual space and doing the
1542 * nfs read or write rpc's from it.
1543 * If the nfsiod's are not running, this is just called from nfs_strategy(),
1544 * otherwise it is called by the nfsiods to do what would normally be
1545 * partially disk interrupt driven.
1546 */
1547nfs_doio(bp)
1548 register struct buf *bp;
1549{
1550 register struct uio *uiop;
1551 register struct vnode *vp;
1552 struct nfsnode *np;
1553 struct ucred *cr;
1554 int error;
1555 struct uio uio;
1556 struct iovec io;
1557#if !defined(hp300) && !defined(i386)
1558 register struct pte *pte, *ppte;
1559 register caddr_t vaddr;
1560 int npf, npf2;
1561 int reg, o;
1562 caddr_t vbase;
1563 unsigned v;
1564#endif
1565
1566 vp = bp->b_vp;
1567 np = VTONFS(vp);
1568 uiop = &uio;
1569 uiop->uio_iov = &io;
1570 uiop->uio_iovcnt = 1;
1571 uiop->uio_segflg = UIO_SYSSPACE;
1572 uiop->uio_procp = (struct proc *)0;
1573
1574 /*
1575 * For phys i/o, map the b_addr into kernel virtual space using
1576 * the Nfsiomap pte's
1577 * Also, add a temporary b_rcred for reading using the process's uid
1578 * and a guess at a group
1579 */
1580 if (bp->b_flags & B_PHYS) {
1581 if (bp->b_flags & B_DIRTY)
1582 uiop->uio_procp = pageproc;
1583 cr = crcopy(uiop->uio_procp->p_ucred);
1584 /* mapping was already done by vmapbuf */
1585 io.iov_base = bp->b_un.b_addr;
1586
1587 /*
1588 * And do the i/o rpc
1589 */
1590 io.iov_len = uiop->uio_resid = bp->b_bcount;
1591 uiop->uio_offset = bp->b_blkno * DEV_BSIZE;
1592 if (bp->b_flags & B_READ) {
1593 uiop->uio_rw = UIO_READ;
1594 nfsstats.read_physios++;
1595 bp->b_error = error = nfs_readrpc(vp, uiop, cr);
1596 (void) vnode_pager_uncache(vp);
1597 } else {
1598 uiop->uio_rw = UIO_WRITE;
1599 nfsstats.write_physios++;
1600 bp->b_error = error = nfs_writerpc(vp, uiop, cr);
1601 }
1602
1603 /*
1604 * Finally, release pte's used by physical i/o
1605 */
1606 crfree(cr);
1607 } else {
1608 if (bp->b_flags & B_READ) {
1609 io.iov_len = uiop->uio_resid = bp->b_bcount;
1610 io.iov_base = bp->b_un.b_addr;
1611 uiop->uio_rw = UIO_READ;
1612 switch (vp->v_type) {
1613 case VREG:
1614 uiop->uio_offset = bp->b_blkno * DEV_BSIZE;
1615 nfsstats.read_bios++;
1616 error = nfs_readrpc(vp, uiop, bp->b_rcred);
1617 break;
1618 case VLNK:
1619 uiop->uio_offset = 0;
1620 nfsstats.readlink_bios++;
1621 error = nfs_readlinkrpc(vp, uiop, bp->b_rcred);
1622 break;
1623 case VDIR:
1624 uiop->uio_offset = bp->b_lblkno;
1625 nfsstats.readdir_bios++;
1626 error = nfs_readdirrpc(vp, uiop, bp->b_rcred);
1627 /*
1628 * Save offset cookie in b_blkno.
1629 */
1630 bp->b_blkno = uiop->uio_offset;
1631 break;
1632 };
1633 bp->b_error = error;
1634 } else {
1635 io.iov_len = uiop->uio_resid = bp->b_dirtyend
1636 - bp->b_dirtyoff;
1637 uiop->uio_offset = (bp->b_blkno * DEV_BSIZE)
1638 + bp->b_dirtyoff;
1639 io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff;
1640 uiop->uio_rw = UIO_WRITE;
1641 nfsstats.write_bios++;
1642 bp->b_error = error = nfs_writerpc(vp, uiop,
1643 bp->b_wcred);
1644 if (error) {
1645 np->n_error = error;
1646 np->n_flag |= NWRITEERR;
1647 }
1648 bp->b_dirtyoff = bp->b_dirtyend = 0;
1649 }
1650 }
1651 if (error)
1652 bp->b_flags |= B_ERROR;
1653 bp->b_resid = uiop->uio_resid;
1654 biodone(bp);
1655 return (error);
1656}
1657
1658/*
1659 * Mmap a file
1660 *
1661 * NB Currently unsupported.
1662 */
1663/* ARGSUSED */
1664nfs_mmap(vp, fflags, cred, p)
1665 struct vnode *vp;
1666 int fflags;
1667 struct ucred *cred;
1668 struct proc *p;
1669{
1670
1671 return (EINVAL);
1672}
1673
1674/*
1675 * Flush all the blocks associated with a vnode.
1676 * Walk through the buffer pool and push any dirty pages
1677 * associated with the vnode.
1678 */
1679/* ARGSUSED */
1680nfs_fsync(vp, fflags, cred, waitfor, p)
1681 register struct vnode *vp;
1682 int fflags;
1683 struct ucred *cred;
1684 int waitfor;
1685 struct proc *p;
1686{
1687 register struct nfsnode *np = VTONFS(vp);
1688 int error = 0;
1689
1690 if (np->n_flag & NMODIFIED) {
1691 np->n_flag &= ~NMODIFIED;
1692 vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0);
1693 }
1694 if (!error && (np->n_flag & NWRITEERR))
1695 error = np->n_error;
1696 return (error);
1697}
1698
1699/*
1700 * NFS advisory byte-level locks.
1701 * Currently unsupported.
1702 */
1703nfs_advlock(vp, id, op, fl, flags)
1704 struct vnode *vp;
1705 caddr_t id;
1706 int op;
1707 struct flock *fl;
1708 int flags;
1709{
1710
1711 return (EOPNOTSUPP);
1712}
1713
1714/*
1715 * Print out the contents of an nfsnode.
1716 */
1717nfs_print(vp)
1718 struct vnode *vp;
1719{
1720 register struct nfsnode *np = VTONFS(vp);
1721
1722 printf("tag VT_NFS, fileid %d fsid 0x%x",
1723 np->n_vattr.va_fileid, np->n_vattr.va_fsid);
1724#ifdef FIFO
1725 if (vp->v_type == VFIFO)
1726 fifo_printinfo(vp);
1727#endif /* FIFO */
1728 printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : "");
1729 if (np->n_lockholder == 0)
1730 return;
1731 printf("\towner pid %d", np->n_lockholder);
1732 if (np->n_lockwaiter)
1733 printf(" waiting pid %d", np->n_lockwaiter);
1734 printf("\n");
1735}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.