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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 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: */
76: struct 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: */
115: struct 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
152: struct 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: */
192: extern u_long nfs_procids[NFS_NPROCS];
193: extern u_long nfs_prog, nfs_vers;
194: extern char nfsiobuf[MAXPHYS+NBPG];
195: struct buf nfs_bqueue; /* Queue head for nfsiod's */
196: struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
197: int nfs_numasync = 0;
198:
199: /*
200: * nfs null call from vfs.
201: */
202: nfs_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: */
222: nfs_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;
255: found:
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 */
268: nfs_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 */
288: nfs_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: */
314: nfs_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:
323: nfs_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: */
352: nfs_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: */
411: nfs_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);
485: nfsmout:
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: */
603: nfs_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: */
617: nfs_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: */
631: nfs_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: */
659: nfs_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: }
695: nfsmout:
696: return (error);
697: }
698:
699: /*
700: * nfs write call
701: */
702: nfs_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: }
734: nfsmout:
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 */
744: nfs_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: */
795: nfs_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: */
842: nfs_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: */
890: nfs_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: */
916: nfs_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: */
964: nfs_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: */
996: nfs_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: */
1036: nfs_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: */
1080: nfs_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: */
1143: nfs_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: */
1187: nfs_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: */
1229: nfs_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: }
1363: nfsmout:
1364: return (error);
1365: }
1366:
1367: static 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: */
1377: nfs_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);
1418: bad:
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: */
1431: nfs_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: */
1471: nfs_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: */
1489: nfs_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: */
1547: nfs_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 */
1664: nfs_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 */
1680: nfs_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: */
1703: nfs_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: */
1717: nfs_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: }
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