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1.1 root 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 is only permitted until one year after the first shipment
9: * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
10: * binary forms are permitted provided that: (1) source distributions retain
11: * this entire copyright notice and comment, and (2) distributions including
12: * binaries display the following acknowledgement: This product includes
13: * software developed by the University of California, Berkeley and its
14: * contributors'' in the documentation or other materials provided with the
15: * distribution and in all advertising materials mentioning features or use
16: * of this software. Neither the name of the University nor the names of
17: * its contributors may be used to endorse or promote products derived from
18: * this software without specific prior written permission.
19: * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22: *
23: * @(#)nfs_vnops.c 7.46 (Berkeley) 7/26/90
24: */
25:
26: /*
27: * vnode op calls for sun nfs version 2
28: */
29:
30: #include "machine/pte.h"
31: #include "machine/mtpr.h"
32: #include "param.h"
33: #include "user.h"
34: #include "proc.h"
35: #include "kernel.h"
36: #include "mount.h"
37: #include "buf.h"
38: #include "vm.h"
39: #include "malloc.h"
40: #include "mbuf.h"
41: #include "errno.h"
42: #include "file.h"
43: #include "conf.h"
44: #include "vnode.h"
45: #include "text.h"
46: #include "map.h"
47: #include "../ufs/quota.h"
48: #include "../ufs/inode.h"
49: #include "nfsv2.h"
50: #include "nfs.h"
51: #include "nfsnode.h"
52: #include "nfsmount.h"
53: #include "xdr_subs.h"
54: #include "nfsm_subs.h"
55: #include "nfsiom.h"
56:
57: /* Defs */
58: #define TRUE 1
59: #define FALSE 0
60:
61: /* Global vars */
62: int nfs_lookup(),
63: nfs_create(),
64: nfs_mknod(),
65: nfs_open(),
66: nfs_close(),
67: nfs_access(),
68: nfs_getattr(),
69: nfs_setattr(),
70: nfs_read(),
71: nfs_write(),
72: vfs_noop(),
73: vfs_nullop(),
74: nfs_remove(),
75: nfs_link(),
76: nfs_rename(),
77: nfs_mkdir(),
78: nfs_rmdir(),
79: nfs_symlink(),
80: nfs_readdir(),
81: nfs_readlink(),
82: nfs_abortop(),
83: nfs_lock(),
84: nfs_unlock(),
85: nfs_bmap(),
86: nfs_strategy(),
87: nfs_fsync(),
88: nfs_inactive(),
89: nfs_reclaim(),
90: nfs_print(),
91: nfs_islocked();
92:
93: struct vnodeops nfsv2_vnodeops = {
94: nfs_lookup, /* lookup */
95: nfs_create, /* create */
96: nfs_mknod, /* mknod */
97: nfs_open, /* open */
98: nfs_close, /* close */
99: nfs_access, /* access */
100: nfs_getattr, /* getattr */
101: nfs_setattr, /* setattr */
102: nfs_read, /* read */
103: nfs_write, /* write */
104: vfs_noop, /* ioctl */
105: vfs_noop, /* select */
106: vfs_noop, /* mmap */
107: nfs_fsync, /* fsync */
108: vfs_nullop, /* seek */
109: nfs_remove, /* remove */
110: nfs_link, /* link */
111: nfs_rename, /* rename */
112: nfs_mkdir, /* mkdir */
113: nfs_rmdir, /* rmdir */
114: nfs_symlink, /* symlink */
115: nfs_readdir, /* readdir */
116: nfs_readlink, /* readlink */
117: nfs_abortop, /* abortop */
118: nfs_inactive, /* inactive */
119: nfs_reclaim, /* reclaim */
120: nfs_lock, /* lock */
121: nfs_unlock, /* unlock */
122: nfs_bmap, /* bmap */
123: nfs_strategy, /* strategy */
124: nfs_print, /* print */
125: nfs_islocked, /* islocked */
126: };
127:
128: /* Special device vnode ops */
129: int spec_lookup(),
130: spec_open(),
131: spec_read(),
132: spec_write(),
133: spec_strategy(),
134: spec_bmap(),
135: spec_ioctl(),
136: spec_select(),
137: spec_close(),
138: spec_badop(),
139: spec_nullop();
140:
141: struct vnodeops spec_nfsv2nodeops = {
142: spec_lookup, /* lookup */
143: spec_badop, /* create */
144: spec_badop, /* mknod */
145: spec_open, /* open */
146: spec_close, /* close */
147: nfs_access, /* access */
148: nfs_getattr, /* getattr */
149: nfs_setattr, /* setattr */
150: spec_read, /* read */
151: spec_write, /* write */
152: spec_ioctl, /* ioctl */
153: spec_select, /* select */
154: spec_badop, /* mmap */
155: spec_nullop, /* fsync */
156: spec_badop, /* seek */
157: spec_badop, /* remove */
158: spec_badop, /* link */
159: spec_badop, /* rename */
160: spec_badop, /* mkdir */
161: spec_badop, /* rmdir */
162: spec_badop, /* symlink */
163: spec_badop, /* readdir */
164: spec_badop, /* readlink */
165: spec_badop, /* abortop */
166: nfs_inactive, /* inactive */
167: nfs_reclaim, /* reclaim */
168: nfs_lock, /* lock */
169: nfs_unlock, /* unlock */
170: spec_bmap, /* bmap */
171: spec_strategy, /* strategy */
172: nfs_print, /* print */
173: nfs_islocked, /* islocked */
174: };
175:
176: #ifdef FIFO
177: int fifo_lookup(),
178: fifo_open(),
179: fifo_read(),
180: fifo_write(),
181: fifo_bmap(),
182: fifo_ioctl(),
183: fifo_select(),
184: fifo_close(),
185: fifo_print(),
186: fifo_badop(),
187: fifo_nullop();
188:
189: struct vnodeops fifo_nfsv2nodeops = {
190: fifo_lookup, /* lookup */
191: fifo_badop, /* create */
192: fifo_badop, /* mknod */
193: fifo_open, /* open */
194: fifo_close, /* close */
195: nfs_access, /* access */
196: nfs_getattr, /* getattr */
197: nfs_setattr, /* setattr */
198: fifo_read, /* read */
199: fifo_write, /* write */
200: fifo_ioctl, /* ioctl */
201: fifo_select, /* select */
202: fifo_badop, /* mmap */
203: fifo_nullop, /* fsync */
204: fifo_badop, /* seek */
205: fifo_badop, /* remove */
206: fifo_badop, /* link */
207: fifo_badop, /* rename */
208: fifo_badop, /* mkdir */
209: fifo_badop, /* rmdir */
210: fifo_badop, /* symlink */
211: fifo_badop, /* readdir */
212: fifo_badop, /* readlink */
213: fifo_badop, /* abortop */
214: nfs_inactive, /* inactive */
215: nfs_reclaim, /* reclaim */
216: nfs_lock, /* lock */
217: nfs_unlock, /* unlock */
218: fifo_bmap, /* bmap */
219: fifo_badop, /* strategy */
220: nfs_print, /* print */
221: nfs_islocked, /* islocked */
222: };
223: #endif /* FIFO */
224:
225: extern u_long nfs_procids[NFS_NPROCS];
226: extern u_long nfs_prog, nfs_vers;
227: extern char nfsiobuf[MAXPHYS+NBPG];
228: struct map nfsmap[NFS_MSIZ];
229: struct buf nfs_bqueue; /* Queue head for nfsiod's */
230: int nfs_asyncdaemons = 0;
231: struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
232: static int nfsmap_want = 0;
233:
234: /*
235: * nfs null call from vfs.
236: */
237: nfs_null(vp, cred)
238: struct vnode *vp;
239: struct ucred *cred;
240: {
241: caddr_t bpos, dpos;
242: u_long xid;
243: int error = 0;
244: struct mbuf *mreq, *mrep, *md, *mb;
245:
246: nfsm_reqhead(nfs_procids[NFSPROC_NULL], cred, 0);
247: nfsm_request(vp, NFSPROC_NULL, u.u_procp, 0);
248: nfsm_reqdone;
249: return (error);
250: }
251:
252: /*
253: * nfs access vnode op.
254: * Essentially just get vattr and then imitate iaccess()
255: */
256: nfs_access(vp, mode, cred)
257: struct vnode *vp;
258: int mode;
259: register struct ucred *cred;
260: {
261: register struct vattr *vap;
262: register gid_t *gp;
263: struct vattr vattr;
264: register int i;
265: int error;
266:
267: /*
268: * If you're the super-user,
269: * you always get access.
270: */
271: if (cred->cr_uid == 0)
272: return (0);
273: vap = &vattr;
274: if (error = nfs_dogetattr(vp, vap, cred, 0))
275: return (error);
276: /*
277: * Access check is based on only one of owner, group, public.
278: * If not owner, then check group. If not a member of the
279: * group, then check public access.
280: */
281: if (cred->cr_uid != vap->va_uid) {
282: mode >>= 3;
283: gp = cred->cr_groups;
284: for (i = 0; i < cred->cr_ngroups; i++, gp++)
285: if (vap->va_gid == *gp)
286: goto found;
287: mode >>= 3;
288: found:
289: ;
290: }
291: if ((vap->va_mode & mode) != 0)
292: return (0);
293: return (EACCES);
294: }
295:
296: /*
297: * nfs open vnode op
298: * Just check to see if the type is ok
299: */
300: /* ARGSUSED */
301: nfs_open(vp, mode, cred)
302: struct vnode *vp;
303: int mode;
304: struct ucred *cred;
305: {
306: register enum vtype vtyp;
307:
308: vtyp = vp->v_type;
309: if (vtyp == VREG || vtyp == VDIR || vtyp == VLNK)
310: return (0);
311: else
312: return (EACCES);
313: }
314:
315: /*
316: * nfs close vnode op
317: * For reg files, invalidate any buffer cache entries.
318: */
319: /* ARGSUSED */
320: nfs_close(vp, fflags, cred)
321: register struct vnode *vp;
322: int fflags;
323: struct ucred *cred;
324: {
325: register struct nfsnode *np = VTONFS(vp);
326: int error = 0;
327:
328: if (vp->v_type == VREG && (np->n_flag & NMODIFIED)) {
329: nfs_lock(vp);
330: np->n_flag &= ~NMODIFIED;
331: vinvalbuf(vp, TRUE);
332: np->n_attrstamp = 0;
333: if (np->n_flag & NWRITEERR) {
334: np->n_flag &= ~NWRITEERR;
335: error = np->n_error;
336: }
337: nfs_unlock(vp);
338: }
339: return (error);
340: }
341:
342: /*
343: * nfs getattr call from vfs.
344: */
345: nfs_getattr(vp, vap, cred)
346: register struct vnode *vp;
347: struct vattr *vap;
348: struct ucred *cred;
349: {
350: return (nfs_dogetattr(vp, vap, cred, 0));
351: }
352:
353: nfs_dogetattr(vp, vap, cred, tryhard)
354: register struct vnode *vp;
355: struct vattr *vap;
356: struct ucred *cred;
357: int tryhard;
358: {
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:
366: /* First look in the cache.. */
367: if (nfs_getattrcache(vp, vap) == 0)
368: return (0);
369: nfsstats.rpccnt[NFSPROC_GETATTR]++;
370: nfsm_reqhead(nfs_procids[NFSPROC_GETATTR], cred, NFSX_FH);
371: nfsm_fhtom(vp);
372: nfsm_request(vp, NFSPROC_GETATTR, u.u_procp, tryhard);
373: nfsm_loadattr(vp, vap);
374: nfsm_reqdone;
375: return (error);
376: }
377:
378: /*
379: * nfs setattr call.
380: */
381: nfs_setattr(vp, vap, cred)
382: register struct vnode *vp;
383: register struct vattr *vap;
384: struct ucred *cred;
385: {
386: register struct nfsv2_sattr *sp;
387: register caddr_t cp;
388: register long t1;
389: caddr_t bpos, dpos;
390: u_long xid;
391: int error = 0;
392: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
393: struct nfsnode *np;
394:
395: nfsstats.rpccnt[NFSPROC_SETATTR]++;
396: nfsm_reqhead(nfs_procids[NFSPROC_SETATTR], cred, NFSX_FH+NFSX_SATTR);
397: nfsm_fhtom(vp);
398: nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
399: if (vap->va_mode == 0xffff)
400: sp->sa_mode = VNOVAL;
401: else
402: sp->sa_mode = vtonfs_mode(vp->v_type, vap->va_mode);
403: if (vap->va_uid == 0xffff)
404: sp->sa_uid = VNOVAL;
405: else
406: sp->sa_uid = txdr_unsigned(vap->va_uid);
407: if (vap->va_gid == 0xffff)
408: sp->sa_gid = VNOVAL;
409: else
410: sp->sa_gid = txdr_unsigned(vap->va_gid);
411: sp->sa_size = txdr_unsigned(vap->va_size);
412: sp->sa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec);
413: sp->sa_atime.tv_usec = txdr_unsigned(vap->va_flags);
414: txdr_time(&vap->va_mtime, &sp->sa_mtime);
415: if (vap->va_size != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
416: vap->va_atime.tv_sec != VNOVAL) {
417: np = VTONFS(vp);
418: if (np->n_flag & NMODIFIED) {
419: np->n_flag &= ~NMODIFIED;
420: vinvalbuf(vp, TRUE);
421: np->n_attrstamp = 0;
422: }
423: }
424: nfsm_request(vp, NFSPROC_SETATTR, u.u_procp, 1);
425: nfsm_loadattr(vp, (struct vattr *)0);
426: /* should we fill in any vap fields ?? */
427: nfsm_reqdone;
428: return (error);
429: }
430:
431: /*
432: * nfs lookup call, one step at a time...
433: * First look in cache
434: * If not found, unlock the directory nfsnode and do the rpc
435: */
436: nfs_lookup(vp, ndp)
437: register struct vnode *vp;
438: register struct nameidata *ndp;
439: {
440: register struct vnode *vdp;
441: register u_long *p;
442: register caddr_t cp;
443: register long t1, t2;
444: caddr_t bpos, dpos, cp2;
445: u_long xid;
446: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
447: struct vnode *newvp;
448: long len;
449: nfsv2fh_t *fhp;
450: struct nfsnode *np;
451: int lockparent, wantparent, flag, error = 0;
452:
453: ndp->ni_dvp = vp;
454: ndp->ni_vp = NULL;
455: if (vp->v_type != VDIR)
456: return (ENOTDIR);
457: lockparent = ndp->ni_nameiop & LOCKPARENT;
458: flag = ndp->ni_nameiop & OPFLAG;
459: wantparent = ndp->ni_nameiop & (LOCKPARENT|WANTPARENT);
460: if ((error = cache_lookup(ndp)) && error != ENOENT) {
461: struct vattr vattr;
462: int vpid;
463:
464: if (vp == ndp->ni_rdir && ndp->ni_isdotdot)
465: panic("nfs_lookup: .. through root");
466: vdp = ndp->ni_vp;
467: vpid = vdp->v_id;
468: /*
469: * See the comment starting `Step through' in ufs/ufs_lookup.c
470: * for an explanation of the locking protocol
471: */
472: if (vp == vdp) {
473: VREF(vdp);
474: error = 0;
475: } else if (ndp->ni_isdotdot) {
476: nfs_unlock(vp);
477: error = vget(vdp);
478: } else {
479: error = vget(vdp);
480: nfs_unlock(vp);
481: }
482: if (!error) {
483: if (vpid == vdp->v_id) {
484: if (!nfs_dogetattr(vdp, &vattr, ndp->ni_cred, 0) &&
485: vattr.va_ctime.tv_sec == VTONFS(vdp)->n_ctime) {
486: nfsstats.lookupcache_hits++;
487: return (0);
488: } else {
489: cache_purge(vdp);
490: nfs_nput(vdp);
491: }
492: } else {
493: nfs_nput(vdp);
494: }
495: }
496: ndp->ni_vp = NULLVP;
497: } else
498: nfs_unlock(vp);
499: error = 0;
500: nfsstats.lookupcache_misses++;
501: nfsstats.rpccnt[NFSPROC_LOOKUP]++;
502: len = ndp->ni_namelen;
503: nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
504: nfsm_fhtom(vp);
505: nfsm_strtom(ndp->ni_ptr, len, NFS_MAXNAMLEN);
506: nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 0);
507: nfsmout:
508: if (error) {
509: if (lockparent || (flag != CREATE && flag != RENAME) ||
510: *ndp->ni_next != 0)
511: nfs_lock(vp);
512: return (error);
513: }
514: nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH);
515:
516: /*
517: * Handle DELETE and RENAME cases...
518: */
519: if (flag == DELETE && *ndp->ni_next == 0) {
520: if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
521: VREF(vp);
522: newvp = vp;
523: np = VTONFS(vp);
524: } else {
525: if (error = nfs_nget(vp->v_mount, fhp, &np)) {
526: nfs_lock(vp);
527: m_freem(mrep);
528: return (error);
529: }
530: newvp = NFSTOV(np);
531: }
532: if (error =
533: nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
534: nfs_lock(vp);
535: if (newvp != vp)
536: nfs_nput(newvp);
537: else
538: vrele(vp);
539: m_freem(mrep);
540: return (error);
541: }
542: ndp->ni_vp = newvp;
543: if (lockparent || vp == newvp)
544: nfs_lock(vp);
545: m_freem(mrep);
546: return (0);
547: }
548:
549: if (flag == RENAME && wantparent && *ndp->ni_next == 0) {
550: if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
551: nfs_lock(vp);
552: m_freem(mrep);
553: return (EISDIR);
554: }
555: if (error = nfs_nget(vp->v_mount, fhp, &np)) {
556: nfs_lock(vp);
557: m_freem(mrep);
558: return (error);
559: }
560: newvp = NFSTOV(np);
561: if (error =
562: nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
563: nfs_lock(vp);
564: nfs_nput(newvp);
565: m_freem(mrep);
566: return (error);
567: }
568: ndp->ni_vp = newvp;
569: if (lockparent)
570: nfs_lock(vp);
571: return (0);
572: }
573:
574: if (!bcmp(VTONFS(vp)->n_fh.fh_bytes, (caddr_t)fhp, NFSX_FH)) {
575: VREF(vp);
576: newvp = vp;
577: np = VTONFS(vp);
578: } else if (ndp->ni_isdotdot) {
579: if (error = nfs_nget(vp->v_mount, fhp, &np)) {
580: nfs_lock(vp);
581: m_freem(mrep);
582: return (error);
583: }
584: newvp = NFSTOV(np);
585: } else {
586: if (error = nfs_nget(vp->v_mount, fhp, &np)) {
587: nfs_lock(vp);
588: m_freem(mrep);
589: return (error);
590: }
591: newvp = NFSTOV(np);
592: }
593: if (error = nfs_loadattrcache(&newvp, &md, &dpos, (struct vattr *)0)) {
594: nfs_lock(vp);
595: if (newvp != vp)
596: nfs_nput(newvp);
597: else
598: vrele(vp);
599: m_freem(mrep);
600: return (error);
601: }
602: m_freem(mrep);
603:
604: if (vp == newvp || (lockparent && *ndp->ni_next == '\0'))
605: nfs_lock(vp);
606: ndp->ni_vp = newvp;
607: if (error == 0 && ndp->ni_makeentry) {
608: np->n_ctime = np->n_vattr.va_ctime.tv_sec;
609: cache_enter(ndp);
610: }
611: return (error);
612: }
613:
614: /*
615: * nfs read call.
616: * Just call nfs_bioread() to do the work.
617: */
618: nfs_read(vp, uiop, ioflag, cred)
619: register struct vnode *vp;
620: struct uio *uiop;
621: int ioflag;
622: struct ucred *cred;
623: {
624: if (vp->v_type != VREG)
625: return (EPERM);
626: return (nfs_bioread(vp, uiop, ioflag, cred));
627: }
628:
629: /*
630: * nfs readlink call
631: */
632: nfs_readlink(vp, uiop, cred)
633: struct vnode *vp;
634: struct uio *uiop;
635: struct ucred *cred;
636: {
637: if (vp->v_type != VLNK)
638: return (EPERM);
639: return (nfs_bioread(vp, uiop, 0, cred));
640: }
641:
642: /*
643: * Do a readlink rpc.
644: * Called by nfs_doio() from below the buffer cache.
645: */
646: nfs_readlinkrpc(vp, uiop, cred, procp)
647: register struct vnode *vp;
648: struct uio *uiop;
649: struct ucred *cred;
650: struct proc *procp;
651: {
652: register u_long *p;
653: register caddr_t cp;
654: register long t1;
655: caddr_t bpos, dpos, cp2;
656: u_long xid;
657: int error = 0;
658: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
659: long len;
660:
661: nfsstats.rpccnt[NFSPROC_READLINK]++;
662: nfs_unlock(vp);
663: nfsm_reqhead(nfs_procids[NFSPROC_READLINK], cred, NFSX_FH);
664: nfsm_fhtom(vp);
665: nfsm_request(vp, NFSPROC_READLINK, procp, 0);
666: nfsm_strsiz(len, NFS_MAXPATHLEN);
667: nfsm_mtouio(uiop, len);
668: nfsm_reqdone;
669: nfs_lock(vp);
670: return (error);
671: }
672:
673: /*
674: * nfs read rpc call
675: * Ditto above
676: */
677: nfs_readrpc(vp, uiop, cred, procp)
678: register struct vnode *vp;
679: struct uio *uiop;
680: struct ucred *cred;
681: struct proc *procp;
682: {
683: register u_long *p;
684: register caddr_t cp;
685: register long t1;
686: caddr_t bpos, dpos, cp2;
687: u_long xid;
688: int error = 0;
689: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
690: struct nfsmount *nmp;
691: long len, retlen, tsiz;
692:
693: nmp = VFSTONFS(vp->v_mount);
694: tsiz = uiop->uio_resid;
695: while (tsiz > 0) {
696: nfsstats.rpccnt[NFSPROC_READ]++;
697: len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
698: nfsm_reqhead(nfs_procids[NFSPROC_READ], cred, NFSX_FH+NFSX_UNSIGNED*3);
699: nfsm_fhtom(vp);
700: nfsm_build(p, u_long *, NFSX_UNSIGNED*3);
701: *p++ = txdr_unsigned(uiop->uio_offset);
702: *p++ = txdr_unsigned(len);
703: *p = 0;
704: nfsm_request(vp, NFSPROC_READ, procp, 1);
705: nfsm_loadattr(vp, (struct vattr *)0);
706: nfsm_strsiz(retlen, nmp->nm_rsize);
707: nfsm_mtouio(uiop, retlen);
708: m_freem(mrep);
709: if (retlen < len)
710: tsiz = 0;
711: else
712: tsiz -= len;
713: }
714: nfsmout:
715: return (error);
716: }
717:
718: /*
719: * nfs write call
720: */
721: nfs_writerpc(vp, uiop, cred, procp)
722: register struct vnode *vp;
723: struct uio *uiop;
724: struct ucred *cred;
725: struct proc *procp;
726: {
727: register u_long *p;
728: register caddr_t cp;
729: register long t1;
730: caddr_t bpos, dpos;
731: u_long xid;
732: int error = 0;
733: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
734: struct nfsmount *nmp;
735: long len, tsiz;
736:
737: nmp = VFSTONFS(vp->v_mount);
738: tsiz = uiop->uio_resid;
739: while (tsiz > 0) {
740: nfsstats.rpccnt[NFSPROC_WRITE]++;
741: len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
742: nfsm_reqhead(nfs_procids[NFSPROC_WRITE], cred,
743: NFSX_FH+NFSX_UNSIGNED*4);
744: nfsm_fhtom(vp);
745: nfsm_build(p, u_long *, NFSX_UNSIGNED*4);
746: *(p+1) = txdr_unsigned(uiop->uio_offset);
747: *(p+3) = txdr_unsigned(len);
748: nfsm_uiotom(uiop, len);
749: nfsm_request(vp, NFSPROC_WRITE, procp, 1);
750: nfsm_loadattr(vp, (struct vattr *)0);
751: m_freem(mrep);
752: tsiz -= len;
753: }
754: nfsmout:
755: return (error);
756: }
757:
758: /*
759: * nfs mknod call
760: * This is a kludge. Use a create rpc but with the IFMT bits of the mode
761: * set to specify the file type and the size field for rdev.
762: */
763: /* ARGSUSED */
764: nfs_mknod(ndp, vap, cred)
765: struct nameidata *ndp;
766: struct ucred *cred;
767: register struct vattr *vap;
768: {
769: register struct nfsv2_sattr *sp;
770: register u_long *p;
771: register caddr_t cp;
772: register long t1, t2;
773: caddr_t bpos, dpos;
774: u_long xid;
775: int error = 0;
776: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
777: u_long rdev;
778:
779: if (vap->va_type == VCHR || vap->va_type == VBLK)
780: rdev = txdr_unsigned(vap->va_rdev);
781: #ifdef FIFO
782: else if (vap->va_type == VFIFO)
783: rdev = 0xffffffff;
784: #endif /* FIFO */
785: else {
786: VOP_ABORTOP(ndp);
787: vput(ndp->ni_dvp);
788: return (EOPNOTSUPP);
789: }
790: nfsstats.rpccnt[NFSPROC_CREATE]++;
791: nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred,
792: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR);
793: nfsm_fhtom(ndp->ni_dvp);
794: nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
795: nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
796: sp->sa_mode = vtonfs_mode(vap->va_type, vap->va_mode);
797: sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
798: sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
799: sp->sa_size = rdev;
800: /* or should these be VNOVAL ?? */
801: txdr_time(&vap->va_atime, &sp->sa_atime);
802: txdr_time(&vap->va_mtime, &sp->sa_mtime);
803: nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1);
804: nfsm_reqdone;
805: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
806: nfs_nput(ndp->ni_dvp);
807: return (error);
808: }
809:
810: /*
811: * nfs file create call
812: */
813: nfs_create(ndp, vap)
814: register struct nameidata *ndp;
815: register struct vattr *vap;
816: {
817: register struct nfsv2_sattr *sp;
818: register u_long *p;
819: register caddr_t cp;
820: register long t1, t2;
821: caddr_t bpos, dpos, cp2;
822: u_long xid;
823: int error = 0;
824: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
825:
826: nfsstats.rpccnt[NFSPROC_CREATE]++;
827: nfsm_reqhead(nfs_procids[NFSPROC_CREATE], ndp->ni_cred,
828: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_SATTR);
829: nfsm_fhtom(ndp->ni_dvp);
830: nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
831: nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
832: sp->sa_mode = vtonfs_mode(VREG, vap->va_mode);
833: sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
834: sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
835: sp->sa_size = txdr_unsigned(0);
836: /* or should these be VNOVAL ?? */
837: txdr_time(&vap->va_atime, &sp->sa_atime);
838: txdr_time(&vap->va_mtime, &sp->sa_mtime);
839: nfsm_request(ndp->ni_dvp, NFSPROC_CREATE, u.u_procp, 1);
840: nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
841: nfsm_reqdone;
842: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
843: nfs_nput(ndp->ni_dvp);
844: return (error);
845: }
846:
847: /*
848: * nfs file remove call
849: * To try and make nfs semantics closer to ufs semantics, a file that has
850: * other processes using the vnode is renamed instead of removed and then
851: * removed later on the last close.
852: * - If v_usecount > 1
853: * If a rename is not already in the works
854: * call nfs_sillyrename() to set it up
855: * else
856: * do the remove rpc
857: */
858: nfs_remove(ndp)
859: register struct nameidata *ndp;
860: {
861: register struct vnode *vp = ndp->ni_vp;
862: register struct nfsnode *np = VTONFS(ndp->ni_vp);
863: register u_long *p;
864: register caddr_t cp;
865: register long t1, t2;
866: caddr_t bpos, dpos;
867: u_long xid;
868: int error = 0;
869: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
870:
871: if (vp->v_usecount > 1) {
872: if (!np->n_sillyrename)
873: error = nfs_sillyrename(ndp, REMOVE);
874: } else {
875: nfsstats.rpccnt[NFSPROC_REMOVE]++;
876: nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred,
877: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
878: nfsm_fhtom(ndp->ni_dvp);
879: nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
880: nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1);
881: nfsm_reqdone;
882: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
883: /*
884: * Kludge City: If the first reply to the remove rpc is lost..
885: * the reply to the retransmitted request will be ENOENT
886: * since the file was in fact removed
887: * Therefore, we cheat and return success.
888: */
889: if (error == ENOENT)
890: error = 0;
891: }
892: np->n_attrstamp = 0;
893: if (ndp->ni_dvp == vp)
894: vrele(vp);
895: else
896: nfs_nput(ndp->ni_dvp);
897: nfs_nput(vp);
898: return (error);
899: }
900:
901: /*
902: * nfs file remove rpc called from nfs_inactive
903: */
904: nfs_removeit(ndp)
905: register struct nameidata *ndp;
906: {
907: register u_long *p;
908: register caddr_t cp;
909: register long t1, t2;
910: caddr_t bpos, dpos;
911: u_long xid;
912: int error = 0;
913: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
914:
915: nfsstats.rpccnt[NFSPROC_REMOVE]++;
916: nfsm_reqhead(nfs_procids[NFSPROC_REMOVE], ndp->ni_cred,
917: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
918: nfsm_fhtom(ndp->ni_dvp);
919: nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
920: nfsm_request(ndp->ni_dvp, NFSPROC_REMOVE, u.u_procp, 1);
921: nfsm_reqdone;
922: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
923: return (error);
924: }
925:
926: /*
927: * nfs file rename call
928: */
929: nfs_rename(sndp, tndp)
930: register struct nameidata *sndp, *tndp;
931: {
932: register u_long *p;
933: register caddr_t cp;
934: register long t1, t2;
935: caddr_t bpos, dpos;
936: u_long xid;
937: int error = 0;
938: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
939:
940: nfsstats.rpccnt[NFSPROC_RENAME]++;
941: nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred,
942: (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+
943: nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/
944: nfsm_fhtom(sndp->ni_dvp);
945: nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
946: nfsm_fhtom(tndp->ni_dvp);
947: nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
948: nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1);
949: nfsm_reqdone;
950: VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED;
951: VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED;
952: if (sndp->ni_vp->v_type == VDIR) {
953: if (tndp->ni_vp != NULL && tndp->ni_vp->v_type == VDIR)
954: cache_purge(tndp->ni_dvp);
955: cache_purge(sndp->ni_dvp);
956: }
957: VOP_ABORTOP(tndp);
958: if (tndp->ni_dvp == tndp->ni_vp)
959: vrele(tndp->ni_dvp);
960: else
961: vput(tndp->ni_dvp);
962: if (tndp->ni_vp)
963: vput(tndp->ni_vp);
964: VOP_ABORTOP(sndp);
965: vrele(sndp->ni_dvp);
966: vrele(sndp->ni_vp);
967: /*
968: * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
969: */
970: if (error == ENOENT)
971: error = 0;
972: return (error);
973: }
974:
975: /*
976: * nfs file rename rpc called from nfs_remove() above
977: */
978: nfs_renameit(sndp, tndp)
979: register struct nameidata *sndp, *tndp;
980: {
981: register u_long *p;
982: register caddr_t cp;
983: register long t1, t2;
984: caddr_t bpos, dpos;
985: u_long xid;
986: int error = 0;
987: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
988:
989: nfsstats.rpccnt[NFSPROC_RENAME]++;
990: nfsm_reqhead(nfs_procids[NFSPROC_RENAME], tndp->ni_cred,
991: (NFSX_FH+NFSX_UNSIGNED)*2+nfsm_rndup(sndp->ni_dent.d_namlen)+
992: nfsm_rndup(tndp->ni_dent.d_namlen)); /* or sndp->ni_cred?*/
993: nfsm_fhtom(sndp->ni_dvp);
994: nfsm_strtom(sndp->ni_dent.d_name,sndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
995: nfsm_fhtom(tndp->ni_dvp);
996: nfsm_strtom(tndp->ni_dent.d_name,tndp->ni_dent.d_namlen,NFS_MAXNAMLEN);
997: nfsm_request(sndp->ni_dvp, NFSPROC_RENAME, u.u_procp, 1);
998: nfsm_reqdone;
999: VTONFS(sndp->ni_dvp)->n_flag |= NMODIFIED;
1000: VTONFS(tndp->ni_dvp)->n_flag |= NMODIFIED;
1001: return (error);
1002: }
1003:
1004: /*
1005: * nfs hard link create call
1006: */
1007: nfs_link(vp, ndp)
1008: register struct vnode *vp;
1009: register struct nameidata *ndp;
1010: {
1011: register u_long *p;
1012: register caddr_t cp;
1013: register long t1, t2;
1014: caddr_t bpos, dpos;
1015: u_long xid;
1016: int error = 0;
1017: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1018:
1019: if (ndp->ni_dvp != vp)
1020: nfs_lock(vp);
1021: nfsstats.rpccnt[NFSPROC_LINK]++;
1022: nfsm_reqhead(nfs_procids[NFSPROC_LINK], ndp->ni_cred,
1023: NFSX_FH*2+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
1024: nfsm_fhtom(vp);
1025: nfsm_fhtom(ndp->ni_dvp);
1026: nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
1027: nfsm_request(vp, NFSPROC_LINK, u.u_procp, 1);
1028: nfsm_reqdone;
1029: VTONFS(vp)->n_attrstamp = 0;
1030: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1031: if (ndp->ni_dvp != vp)
1032: nfs_unlock(vp);
1033: nfs_nput(ndp->ni_dvp);
1034: /*
1035: * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1036: */
1037: if (error == EEXIST)
1038: error = 0;
1039: return (error);
1040: }
1041:
1042: /*
1043: * nfs symbolic link create call
1044: */
1045: nfs_symlink(ndp, vap, nm)
1046: struct nameidata *ndp;
1047: struct vattr *vap;
1048: char *nm; /* is this the path ?? */
1049: {
1050: register struct nfsv2_sattr *sp;
1051: register u_long *p;
1052: register caddr_t cp;
1053: register long t1, t2;
1054: caddr_t bpos, dpos;
1055: u_long xid;
1056: int error = 0;
1057: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1058:
1059: nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1060: nfsm_reqhead(nfs_procids[NFSPROC_SYMLINK], ndp->ni_cred,
1061: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen)+NFSX_UNSIGNED);
1062: nfsm_fhtom(ndp->ni_dvp);
1063: nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
1064: nfsm_strtom(nm, strlen(nm), NFS_MAXPATHLEN);
1065: nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
1066: sp->sa_mode = vtonfs_mode(VLNK, vap->va_mode);
1067: sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
1068: sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
1069: sp->sa_size = txdr_unsigned(VNOVAL);
1070: txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */
1071: txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */
1072: nfsm_request(ndp->ni_dvp, NFSPROC_SYMLINK, u.u_procp, 1);
1073: nfsm_reqdone;
1074: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1075: nfs_nput(ndp->ni_dvp);
1076: /*
1077: * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1078: */
1079: if (error == EEXIST)
1080: error = 0;
1081: return (error);
1082: }
1083:
1084: /*
1085: * nfs make dir call
1086: */
1087: nfs_mkdir(ndp, vap)
1088: register struct nameidata *ndp;
1089: struct vattr *vap;
1090: {
1091: register struct nfsv2_sattr *sp;
1092: register u_long *p;
1093: register caddr_t cp;
1094: register long t1, t2;
1095: register int len;
1096: caddr_t bpos, dpos, cp2;
1097: u_long xid;
1098: int error = 0, firsttry = 1;
1099: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1100:
1101: len = ndp->ni_dent.d_namlen;
1102: nfsstats.rpccnt[NFSPROC_MKDIR]++;
1103: nfsm_reqhead(nfs_procids[NFSPROC_MKDIR], ndp->ni_cred,
1104: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len)+NFSX_SATTR);
1105: nfsm_fhtom(ndp->ni_dvp);
1106: nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN);
1107: nfsm_build(sp, struct nfsv2_sattr *, NFSX_SATTR);
1108: sp->sa_mode = vtonfs_mode(VDIR, vap->va_mode);
1109: sp->sa_uid = txdr_unsigned(ndp->ni_cred->cr_uid);
1110: sp->sa_gid = txdr_unsigned(ndp->ni_cred->cr_gid);
1111: sp->sa_size = txdr_unsigned(VNOVAL);
1112: txdr_time(&vap->va_atime, &sp->sa_atime); /* or VNOVAL ?? */
1113: txdr_time(&vap->va_mtime, &sp->sa_mtime); /* or VNOVAL ?? */
1114: nfsm_request(ndp->ni_dvp, NFSPROC_MKDIR, u.u_procp, 1);
1115: nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
1116: nfsm_reqdone;
1117: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1118: /*
1119: * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
1120: * if we can succeed in looking up the directory.
1121: * "firsttry" is necessary since the macros may "goto nfsmout" which
1122: * is above the if on errors. (Ugh)
1123: */
1124: if (error == EEXIST && firsttry) {
1125: firsttry = 0;
1126: error = 0;
1127: nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1128: ndp->ni_vp = NULL;
1129: nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred,
1130: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
1131: nfsm_fhtom(ndp->ni_dvp);
1132: nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN);
1133: nfsm_request(ndp->ni_dvp, NFSPROC_LOOKUP, u.u_procp, 1);
1134: nfsm_mtofh(ndp->ni_dvp, ndp->ni_vp);
1135: if (ndp->ni_vp->v_type != VDIR) {
1136: vput(ndp->ni_vp);
1137: error = EEXIST;
1138: }
1139: m_freem(mrep);
1140: }
1141: nfs_nput(ndp->ni_dvp);
1142: return (error);
1143: }
1144:
1145: /*
1146: * nfs remove directory call
1147: */
1148: nfs_rmdir(ndp)
1149: register struct nameidata *ndp;
1150: {
1151: register u_long *p;
1152: register caddr_t cp;
1153: register long t1, t2;
1154: caddr_t bpos, dpos;
1155: u_long xid;
1156: int error = 0;
1157: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1158:
1159: if (ndp->ni_dvp == ndp->ni_vp) {
1160: vrele(ndp->ni_dvp);
1161: nfs_nput(ndp->ni_dvp);
1162: return (EINVAL);
1163: }
1164: nfsstats.rpccnt[NFSPROC_RMDIR]++;
1165: nfsm_reqhead(nfs_procids[NFSPROC_RMDIR], ndp->ni_cred,
1166: NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(ndp->ni_dent.d_namlen));
1167: nfsm_fhtom(ndp->ni_dvp);
1168: nfsm_strtom(ndp->ni_dent.d_name, ndp->ni_dent.d_namlen, NFS_MAXNAMLEN);
1169: nfsm_request(ndp->ni_dvp, NFSPROC_RMDIR, u.u_procp, 1);
1170: nfsm_reqdone;
1171: VTONFS(ndp->ni_dvp)->n_flag |= NMODIFIED;
1172: cache_purge(ndp->ni_dvp);
1173: cache_purge(ndp->ni_vp);
1174: nfs_nput(ndp->ni_vp);
1175: nfs_nput(ndp->ni_dvp);
1176: /*
1177: * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
1178: */
1179: if (error == ENOENT)
1180: error = 0;
1181: return (error);
1182: }
1183:
1184: /*
1185: * nfs readdir call
1186: * Although cookie is defined as opaque, I translate it to/from net byte
1187: * order so that it looks more sensible. This appears consistent with the
1188: * Ultrix implementation of NFS.
1189: */
1190: nfs_readdir(vp, uiop, cred, eofflagp)
1191: register struct vnode *vp;
1192: struct uio *uiop;
1193: struct ucred *cred;
1194: int *eofflagp;
1195: {
1196: register struct nfsnode *np = VTONFS(vp);
1197: int tresid, error;
1198: struct vattr vattr;
1199:
1200: if (vp->v_type != VDIR)
1201: return (EPERM);
1202: /*
1203: * First, check for hit on the EOF offset cache
1204: */
1205: if (uiop->uio_offset != 0 && uiop->uio_offset == np->n_direofoffset &&
1206: (np->n_flag & NMODIFIED) == 0 &&
1207: nfs_dogetattr(vp, &vattr, cred, 0) == 0 &&
1208: np->n_mtime == vattr.va_mtime.tv_sec) {
1209: *eofflagp = 1;
1210: nfsstats.direofcache_hits++;
1211: return (0);
1212: }
1213:
1214: /*
1215: * Call nfs_bioread() to do the real work.
1216: */
1217: tresid = uiop->uio_resid;
1218: error = nfs_bioread(vp, uiop, 0, cred);
1219:
1220: if (!error && uiop->uio_resid == tresid) {
1221: *eofflagp = 1;
1222: nfsstats.direofcache_misses++;
1223: } else
1224: *eofflagp = 0;
1225: return (error);
1226: }
1227:
1228: /*
1229: * Readdir rpc call.
1230: * Called from below the buffer cache by nfs_doio().
1231: */
1232: nfs_readdirrpc(vp, uiop, cred, procp)
1233: register struct vnode *vp;
1234: struct uio *uiop;
1235: struct ucred *cred;
1236: struct proc *procp;
1237: {
1238: register long len;
1239: register struct direct *dp;
1240: register u_long *p;
1241: register caddr_t cp;
1242: register long t1;
1243: long tlen, lastlen;
1244: caddr_t bpos, dpos, cp2;
1245: u_long xid;
1246: int error = 0;
1247: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1248: struct mbuf *md2;
1249: caddr_t dpos2;
1250: int siz;
1251: int more_dirs = 1;
1252: off_t off, savoff;
1253: struct direct *savdp;
1254: struct nfsmount *nmp;
1255: struct nfsnode *np = VTONFS(vp);
1256: long tresid;
1257:
1258: nmp = VFSTONFS(vp->v_mount);
1259: tresid = uiop->uio_resid;
1260: /*
1261: * Loop around doing readdir rpc's of size uio_resid or nm_rsize,
1262: * whichever is smaller, truncated to a multiple of DIRBLKSIZ.
1263: * The stopping criteria is EOF or buffer full.
1264: */
1265: while (more_dirs && uiop->uio_resid >= DIRBLKSIZ) {
1266: nfsstats.rpccnt[NFSPROC_READDIR]++;
1267: nfsm_reqhead(nfs_procids[NFSPROC_READDIR], cred, xid);
1268: nfsm_fhtom(vp);
1269: nfsm_build(p, u_long *, 2*NFSX_UNSIGNED);
1270: *p++ = txdr_unsigned(uiop->uio_offset);
1271: *p = txdr_unsigned(((uiop->uio_resid > nmp->nm_rsize) ?
1272: nmp->nm_rsize : uiop->uio_resid) & ~(DIRBLKSIZ-1));
1273: nfsm_request(vp, NFSPROC_READDIR, procp, 0);
1274: siz = 0;
1275: nfsm_disect(p, u_long *, NFSX_UNSIGNED);
1276: more_dirs = fxdr_unsigned(int, *p);
1277:
1278: /* Save the position so that we can do nfsm_mtouio() later */
1279: dpos2 = dpos;
1280: md2 = md;
1281:
1282: /* loop thru the dir entries, doctoring them to 4bsd form */
1283: off = uiop->uio_offset;
1284: #ifdef lint
1285: dp = (struct direct *)0;
1286: #endif /* lint */
1287: while (more_dirs && siz < uiop->uio_resid) {
1288: savoff = off; /* Hold onto offset and dp */
1289: savdp = dp;
1290: nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED);
1291: dp = (struct direct *)p;
1292: dp->d_ino = fxdr_unsigned(u_long, *p++);
1293: len = fxdr_unsigned(int, *p);
1294: if (len <= 0 || len > NFS_MAXNAMLEN) {
1295: error = EBADRPC;
1296: m_freem(mrep);
1297: goto nfsmout;
1298: }
1299: dp->d_namlen = (u_short)len;
1300: nfsm_adv(len); /* Point past name */
1301: tlen = nfsm_rndup(len);
1302: /*
1303: * This should not be necessary, but some servers have
1304: * broken XDR such that these bytes are not null filled.
1305: */
1306: if (tlen != len) {
1307: *dpos = '\0'; /* Null-terminate */
1308: nfsm_adv(tlen - len);
1309: len = tlen;
1310: }
1311: nfsm_disecton(p, u_long *, 2*NFSX_UNSIGNED);
1312: off = fxdr_unsigned(off_t, *p);
1313: *p++ = 0; /* Ensures null termination of name */
1314: more_dirs = fxdr_unsigned(int, *p);
1315: dp->d_reclen = len+4*NFSX_UNSIGNED;
1316: siz += dp->d_reclen;
1317: }
1318: /*
1319: * If at end of rpc data, get the eof boolean
1320: */
1321: if (!more_dirs) {
1322: nfsm_disecton(p, u_long *, NFSX_UNSIGNED);
1323: more_dirs = (fxdr_unsigned(int, *p) == 0);
1324:
1325: /*
1326: * If at EOF, cache directory offset
1327: */
1328: if (!more_dirs)
1329: np->n_direofoffset = off;
1330: }
1331: /*
1332: * If there is too much to fit in the data buffer, use savoff and
1333: * savdp to trim off the last record.
1334: * --> we are not at eof
1335: */
1336: if (siz > uiop->uio_resid) {
1337: off = savoff;
1338: siz -= dp->d_reclen;
1339: dp = savdp;
1340: more_dirs = 0; /* Paranoia */
1341: }
1342: if (siz > 0) {
1343: lastlen = dp->d_reclen;
1344: md = md2;
1345: dpos = dpos2;
1346: nfsm_mtouio(uiop, siz);
1347: uiop->uio_offset = off;
1348: } else
1349: more_dirs = 0; /* Ugh, never happens, but in case.. */
1350: m_freem(mrep);
1351: }
1352: /*
1353: * Fill last record, iff any, out to a multiple of DIRBLKSIZ
1354: * by increasing d_reclen for the last record.
1355: */
1356: if (uiop->uio_resid < tresid) {
1357: len = uiop->uio_resid & (DIRBLKSIZ - 1);
1358: if (len > 0) {
1359: dp = (struct direct *)
1360: (uiop->uio_iov->iov_base - lastlen);
1361: dp->d_reclen += len;
1362: uiop->uio_iov->iov_base += len;
1363: uiop->uio_iov->iov_len -= len;
1364: uiop->uio_resid -= len;
1365: }
1366: }
1367: nfsmout:
1368: return (error);
1369: }
1370:
1371: static char hextoasc[] = "0123456789abcdef";
1372:
1373: /*
1374: * Silly rename. To make the NFS filesystem that is stateless look a little
1375: * more like the "ufs" a remove of an active vnode is translated to a rename
1376: * to a funny looking filename that is removed by nfs_inactive on the
1377: * nfsnode. There is the potential for another process on a different client
1378: * to create the same funny name between the nfs_lookitup() fails and the
1379: * nfs_rename() completes, but...
1380: */
1381: nfs_sillyrename(ndp, flag)
1382: register struct nameidata *ndp;
1383: int flag;
1384: {
1385: register struct nfsnode *np;
1386: register struct sillyrename *sp;
1387: register struct nameidata *tndp;
1388: int error;
1389: short pid;
1390:
1391: np = VTONFS(ndp->ni_dvp);
1392: cache_purge(ndp->ni_dvp);
1393: MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
1394: M_TEMP, M_WAITOK);
1395: sp->s_flag = flag;
1396: bcopy((caddr_t)&np->n_fh, (caddr_t)&sp->s_fh, NFSX_FH);
1397: np = VTONFS(ndp->ni_vp);
1398: tndp = &sp->s_namei;
1399: tndp->ni_cred = crdup(ndp->ni_cred);
1400:
1401: /* Fudge together a funny name */
1402: pid = u.u_procp->p_pid;
1403: bcopy(".nfsAxxxx4.4", tndp->ni_dent.d_name, 13);
1404: tndp->ni_dent.d_namlen = 12;
1405: tndp->ni_dent.d_name[8] = hextoasc[pid & 0xf];
1406: tndp->ni_dent.d_name[7] = hextoasc[(pid >> 4) & 0xf];
1407: tndp->ni_dent.d_name[6] = hextoasc[(pid >> 8) & 0xf];
1408: tndp->ni_dent.d_name[5] = hextoasc[(pid >> 12) & 0xf];
1409:
1410: /* Try lookitups until we get one that isn't there */
1411: while (nfs_lookitup(ndp->ni_dvp, tndp, (nfsv2fh_t *)0) == 0) {
1412: tndp->ni_dent.d_name[4]++;
1413: if (tndp->ni_dent.d_name[4] > 'z') {
1414: error = EINVAL;
1415: goto bad;
1416: }
1417: }
1418: if (error = nfs_renameit(ndp, tndp))
1419: goto bad;
1420: nfs_lookitup(ndp->ni_dvp, tndp, &np->n_fh);
1421: np->n_sillyrename = sp;
1422: return (0);
1423: bad:
1424: crfree(tndp->ni_cred);
1425: free((caddr_t)sp, M_TEMP);
1426: return (error);
1427: }
1428:
1429: /*
1430: * Look up a file name for silly rename stuff.
1431: * Just like nfs_lookup() except that it doesn't load returned values
1432: * into the nfsnode table.
1433: * If fhp != NULL it copies the returned file handle out
1434: */
1435: nfs_lookitup(vp, ndp, fhp)
1436: register struct vnode *vp;
1437: register struct nameidata *ndp;
1438: nfsv2fh_t *fhp;
1439: {
1440: register u_long *p;
1441: register caddr_t cp;
1442: register long t1, t2;
1443: caddr_t bpos, dpos, cp2;
1444: u_long xid;
1445: int error = 0;
1446: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1447: long len;
1448:
1449: nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1450: ndp->ni_dvp = vp;
1451: ndp->ni_vp = NULL;
1452: len = ndp->ni_dent.d_namlen;
1453: nfsm_reqhead(nfs_procids[NFSPROC_LOOKUP], ndp->ni_cred, NFSX_FH+NFSX_UNSIGNED+nfsm_rndup(len));
1454: nfsm_fhtom(vp);
1455: nfsm_strtom(ndp->ni_dent.d_name, len, NFS_MAXNAMLEN);
1456: nfsm_request(vp, NFSPROC_LOOKUP, u.u_procp, 1);
1457: if (fhp != NULL) {
1458: nfsm_disect(cp, caddr_t, NFSX_FH);
1459: bcopy(cp, (caddr_t)fhp, NFSX_FH);
1460: }
1461: nfsm_reqdone;
1462: return (error);
1463: }
1464:
1465: /*
1466: * Kludge City..
1467: * - make nfs_bmap() essentially a no-op that does no translation
1468: * - do nfs_strategy() by faking physical I/O with nfs_readrpc/nfs_writerpc
1469: * after mapping the physical addresses into Kernel Virtual space in the
1470: * nfsiobuf area.
1471: * (Maybe I could use the process's page mapping, but I was concerned that
1472: * Kernel Write might not be enabled and also figured copyout() would do
1473: * a lot more work than bcopy() and also it currently happens in the
1474: * context of the swapper process (2).
1475: */
1476: nfs_bmap(vp, bn, vpp, bnp)
1477: struct vnode *vp;
1478: daddr_t bn;
1479: struct vnode **vpp;
1480: daddr_t *bnp;
1481: {
1482: if (vpp != NULL)
1483: *vpp = vp;
1484: if (bnp != NULL)
1485: *bnp = bn * btodb(vp->v_mount->mnt_stat.f_bsize);
1486: return (0);
1487: }
1488:
1489: /*
1490: * Strategy routine for phys. i/o
1491: * If the biod's are running, queue a request
1492: * otherwise just call nfs_doio() to get it done
1493: */
1494: nfs_strategy(bp)
1495: register struct buf *bp;
1496: {
1497: register struct buf *dp;
1498: register int i;
1499: struct proc *rp;
1500: int error = 0;
1501: int fnd = 0;
1502:
1503: /*
1504: * Set b_proc. It seems a bit silly to do it here, but since bread()
1505: * doesn't set it, I will.
1506: * Set b_proc == NULL for asynchronous reads, since these may still
1507: * be hanging about after the process terminates.
1508: */
1509: if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC))
1510: bp->b_proc = (struct proc *)0;
1511: else
1512: bp->b_proc = u.u_procp;
1513:
1514: /*
1515: * If an i/o daemon is waiting
1516: * queue the request, wake it up and wait for completion
1517: * otherwise just do it ourselves
1518: */
1519: for (i = 0; i < nfs_asyncdaemons; i++) {
1520: if (rp = nfs_iodwant[i]) {
1521: /*
1522: * Ensure that the async_daemon is still waiting here
1523: */
1524: if (rp->p_stat != SSLEEP ||
1525: rp->p_wchan != ((caddr_t)&nfs_iodwant[i])) {
1526: nfs_iodwant[i] = (struct proc *)0;
1527: continue;
1528: }
1529: dp = &nfs_bqueue;
1530: if (dp->b_actf == NULL) {
1531: dp->b_actl = bp;
1532: bp->b_actf = dp;
1533: } else {
1534: dp->b_actf->b_actl = bp;
1535: bp->b_actf = dp->b_actf;
1536: }
1537: dp->b_actf = bp;
1538: bp->b_actl = dp;
1539: fnd++;
1540: nfs_iodwant[i] = (struct proc *)0;
1541: wakeup((caddr_t)&nfs_iodwant[i]);
1542: break;
1543: }
1544: }
1545: if (!fnd)
1546: error = nfs_doio(bp);
1547: return (error);
1548: }
1549:
1550: /*
1551: * Fun and games with i/o
1552: * Essentially play ubasetup() and disk interrupt service routine by
1553: * mapping the data buffer into kernel virtual space and doing the
1554: * nfs read or write rpc's from it.
1555: * If the nfsiod's are not running, this is just called from nfs_strategy(),
1556: * otherwise it is called by the nfsiods to do what would normally be
1557: * partially disk interrupt driven.
1558: */
1559: nfs_doio(bp)
1560: register struct buf *bp;
1561: {
1562: register struct uio *uiop;
1563: register struct vnode *vp;
1564: struct nfsnode *np;
1565: struct ucred *cr;
1566: struct proc *rp;
1567: int error;
1568: struct uio uio;
1569: struct iovec io;
1570: #if !defined(hp300) && !defined(i386)
1571: register struct pte *pte, *ppte;
1572: register caddr_t vaddr;
1573: int npf, npf2;
1574: int reg, o;
1575: caddr_t vbase;
1576: unsigned v;
1577: #endif
1578:
1579: vp = bp->b_vp;
1580: np = VTONFS(vp);
1581: uiop = &uio;
1582: uiop->uio_iov = &io;
1583: uiop->uio_iovcnt = 1;
1584: uiop->uio_segflg = UIO_SYSSPACE;
1585:
1586: /*
1587: * For phys i/o, map the b_addr into kernel virtual space using
1588: * the Nfsiomap pte's
1589: * Also, add a temporary b_rcred for reading using the process's uid
1590: * and a guess at a group
1591: */
1592: if (bp->b_flags & B_PHYS) {
1593: bp->b_rcred = cr = crget();
1594: rp = (bp->b_flags & B_DIRTY) ? &proc[2] : bp->b_proc;
1595: cr->cr_uid = rp->p_uid;
1596: cr->cr_gid = 0; /* Anything ?? */
1597: cr->cr_ngroups = 1;
1598: #if defined(hp300) || defined(i386)
1599: /* mapping was already done by vmapbuf */
1600: io.iov_base = bp->b_un.b_addr;
1601: #else
1602: o = (int)bp->b_un.b_addr & PGOFSET;
1603: npf2 = npf = btoc(bp->b_bcount + o);
1604:
1605: /*
1606: * Get some mapping page table entries
1607: */
1608: while ((reg = rmalloc(nfsmap, (long)npf)) == 0) {
1609: nfsmap_want++;
1610: (void) tsleep((caddr_t)&nfsmap_want, PZERO-1, "nfsmap",
1611: 0);
1612: }
1613: reg--;
1614: if (bp->b_flags & B_PAGET)
1615: pte = &Usrptmap[btokmx((struct pte *)bp->b_un.b_addr)];
1616: else {
1617: v = btop(bp->b_un.b_addr);
1618: if (bp->b_flags & B_UAREA)
1619: pte = &rp->p_addr[v];
1620: else
1621: pte = vtopte(rp, v);
1622: }
1623:
1624: /*
1625: * Play vmaccess() but with the Nfsiomap page table
1626: */
1627: ppte = &Nfsiomap[reg];
1628: vbase = vaddr = &nfsiobuf[reg*NBPG];
1629: while (npf != 0) {
1630: mapin(ppte, (u_int)vaddr, pte->pg_pfnum, (int)(PG_V|PG_KW));
1631: #if defined(tahoe)
1632: mtpr(P1DC, vaddr);
1633: #endif
1634: ppte++;
1635: pte++;
1636: vaddr += NBPG;
1637: --npf;
1638: }
1639: io.iov_base = vbase+o;
1640: #endif /* !defined(hp300) */
1641:
1642: /*
1643: * And do the i/o rpc
1644: */
1645: io.iov_len = uiop->uio_resid = bp->b_bcount;
1646: uiop->uio_offset = bp->b_blkno * DEV_BSIZE;
1647: if (bp->b_flags & B_READ) {
1648: uiop->uio_rw = UIO_READ;
1649: nfsstats.read_physios++;
1650: bp->b_error = error = nfs_readrpc(vp, uiop,
1651: bp->b_rcred, bp->b_proc);
1652: /*
1653: * If a text file has been modified since it was exec'd
1654: * blow the process' out of the water. This is the
1655: * closest we can come to "Text File Busy" in good old
1656: * stateless nfs.
1657: */
1658: if ((vp->v_flag & VTEXT) &&
1659: (vp->v_text->x_mtime != np->n_vattr.va_mtime.tv_sec))
1660: xinval(vp);
1661: } else {
1662: uiop->uio_rw = UIO_WRITE;
1663: nfsstats.write_physios++;
1664: bp->b_error = error = nfs_writerpc(vp, uiop,
1665: bp->b_wcred, bp->b_proc);
1666: }
1667:
1668: /*
1669: * Finally, release pte's used by physical i/o
1670: */
1671: crfree(cr);
1672: #if !defined(hp300) && !defined(i386)
1673: rmfree(nfsmap, (long)npf2, (long)++reg);
1674: if (nfsmap_want) {
1675: nfsmap_want = 0;
1676: wakeup((caddr_t)&nfsmap_want);
1677: }
1678: #endif
1679: } else {
1680: if (bp->b_flags & B_READ) {
1681: io.iov_len = uiop->uio_resid = bp->b_bcount;
1682: io.iov_base = bp->b_un.b_addr;
1683: uiop->uio_rw = UIO_READ;
1684: switch (vp->v_type) {
1685: case VREG:
1686: uiop->uio_offset = bp->b_blkno * DEV_BSIZE;
1687: nfsstats.read_bios++;
1688: error = nfs_readrpc(vp, uiop, bp->b_rcred,
1689: bp->b_proc);
1690: break;
1691: case VLNK:
1692: uiop->uio_offset = 0;
1693: nfsstats.readlink_bios++;
1694: error = nfs_readlinkrpc(vp, uiop, bp->b_rcred,
1695: bp->b_proc);
1696: break;
1697: case VDIR:
1698: uiop->uio_offset = bp->b_lblkno;
1699: nfsstats.readdir_bios++;
1700: error = nfs_readdirrpc(vp, uiop, bp->b_rcred,
1701: bp->b_proc);
1702: /*
1703: * Save offset cookie in b_blkno.
1704: */
1705: bp->b_blkno = uiop->uio_offset;
1706: break;
1707: };
1708: bp->b_error = error;
1709: } else {
1710: io.iov_len = uiop->uio_resid = bp->b_dirtyend
1711: - bp->b_dirtyoff;
1712: uiop->uio_offset = (bp->b_blkno * DEV_BSIZE)
1713: + bp->b_dirtyoff;
1714: io.iov_base = bp->b_un.b_addr + bp->b_dirtyoff;
1715: uiop->uio_rw = UIO_WRITE;
1716: nfsstats.write_bios++;
1717: bp->b_error = error = nfs_writerpc(vp, uiop,
1718: bp->b_wcred, bp->b_proc);
1719: if (error) {
1720: np->n_error = error;
1721: np->n_flag |= NWRITEERR;
1722: }
1723: bp->b_dirtyoff = bp->b_dirtyend = 0;
1724: }
1725: }
1726: if (error)
1727: bp->b_flags |= B_ERROR;
1728: bp->b_resid = uiop->uio_resid;
1729: biodone(bp);
1730: return (error);
1731: }
1732:
1733: /*
1734: * Flush all the blocks associated with a vnode.
1735: * Walk through the buffer pool and push any dirty pages
1736: * associated with the vnode.
1737: */
1738: /* ARGSUSED */
1739: nfs_fsync(vp, fflags, cred, waitfor)
1740: register struct vnode *vp;
1741: int fflags;
1742: struct ucred *cred;
1743: int waitfor;
1744: {
1745: register struct nfsnode *np = VTONFS(vp);
1746: int error = 0;
1747:
1748: if (np->n_flag & NMODIFIED) {
1749: np->n_flag &= ~NMODIFIED;
1750: vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0);
1751: }
1752: if (!error && (np->n_flag & NWRITEERR))
1753: error = np->n_error;
1754: return (error);
1755: }
1756:
1757: /*
1758: * Print out the contents of an nfsnode.
1759: */
1760: nfs_print(vp)
1761: struct vnode *vp;
1762: {
1763: register struct nfsnode *np = VTONFS(vp);
1764:
1765: printf("tag VT_NFS, fileid %d fsid 0x%x",
1766: np->n_vattr.va_fileid, np->n_vattr.va_fsid);
1767: #ifdef FIFO
1768: if (vp->v_type == VFIFO)
1769: fifo_printinfo(vp);
1770: #endif /* FIFO */
1771: printf("%s\n", (np->n_flag & NLOCKED) ? " (LOCKED)" : "");
1772: if (np->n_lockholder == 0)
1773: return;
1774: printf("\towner pid %d", np->n_lockholder);
1775: if (np->n_lockwaiter)
1776: printf(" waiting pid %d", np->n_lockwaiter);
1777: printf("\n");
1778: }
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