coda_vnops.c revision 1.50.4.1 1 /*
2 coda_create/vn_open
3 remove/unlink
4 link
5 mkdir
6 rmdir
7 symlink
8 */
9 /* $NetBSD: coda_vnops.c,v 1.50.4.1 2007/01/12 01:04:02 ad Exp $ */
10
11 /*
12 *
13 * Coda: an Experimental Distributed File System
14 * Release 3.1
15 *
16 * Copyright (c) 1987-1998 Carnegie Mellon University
17 * All Rights Reserved
18 *
19 * Permission to use, copy, modify and distribute this software and its
20 * documentation is hereby granted, provided that both the copyright
21 * notice and this permission notice appear in all copies of the
22 * software, derivative works or modified versions, and any portions
23 * thereof, and that both notices appear in supporting documentation, and
24 * that credit is given to Carnegie Mellon University in all documents
25 * and publicity pertaining to direct or indirect use of this code or its
26 * derivatives.
27 *
28 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
29 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
30 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
31 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
32 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
33 * ANY DERIVATIVE WORK.
34 *
35 * Carnegie Mellon encourages users of this software to return any
36 * improvements or extensions that they make, and to grant Carnegie
37 * Mellon the rights to redistribute these changes without encumbrance.
38 *
39 * @(#) coda/coda_vnops.c,v 1.1.1.1 1998/08/29 21:26:46 rvb Exp $
40 */
41
42 /*
43 * Mach Operating System
44 * Copyright (c) 1990 Carnegie-Mellon University
45 * Copyright (c) 1989 Carnegie-Mellon University
46 * All rights reserved. The CMU software License Agreement specifies
47 * the terms and conditions for use and redistribution.
48 */
49
50 /*
51 * This code was written for the Coda file system at Carnegie Mellon
52 * University. Contributers include David Steere, James Kistler, and
53 * M. Satyanarayanan.
54 */
55
56 #include <sys/cdefs.h>
57 __KERNEL_RCSID(0, "$NetBSD: coda_vnops.c,v 1.50.4.1 2007/01/12 01:04:02 ad Exp $");
58
59 #include <sys/param.h>
60 #include <sys/systm.h>
61 #include <sys/malloc.h>
62 #include <sys/errno.h>
63 #include <sys/acct.h>
64 #include <sys/file.h>
65 #include <sys/uio.h>
66 #include <sys/namei.h>
67 #include <sys/ioctl.h>
68 #include <sys/mount.h>
69 #include <sys/proc.h>
70 #include <sys/select.h>
71 #include <sys/user.h>
72 #include <sys/kauth.h>
73
74 #include <miscfs/genfs/genfs.h>
75
76 #include <coda/coda.h>
77 #include <coda/cnode.h>
78 #include <coda/coda_vnops.h>
79 #include <coda/coda_venus.h>
80 #include <coda/coda_opstats.h>
81 #include <coda/coda_subr.h>
82 #include <coda/coda_namecache.h>
83 #include <coda/coda_pioctl.h>
84
85 /*
86 * These flags select various performance enhancements.
87 */
88 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */
89 int coda_symlink_cache = 1; /* Set to cache symbolic link information */
90 int coda_access_cache = 1; /* Set to handle some access checks directly */
91
92 /* structure to keep track of vfs calls */
93
94 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE];
95
96 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++)
97 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++)
98 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++)
99 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++)
100
101 /* What we are delaying for in printf */
102 int coda_printf_delay = 0; /* in microseconds */
103 int coda_vnop_print_entry = 0;
104 static int coda_lockdebug = 0;
105
106 /* Definition of the vfs operation vector */
107
108 /*
109 * Some NetBSD details:
110 *
111 * coda_start is called at the end of the mount syscall.
112 * coda_init is called at boot time.
113 */
114
115 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__func__))
116
117 /* Definition of the vnode operation vector */
118
119 const struct vnodeopv_entry_desc coda_vnodeop_entries[] = {
120 { &vop_default_desc, coda_vop_error },
121 { &vop_lookup_desc, coda_lookup }, /* lookup */
122 { &vop_create_desc, coda_create }, /* create */
123 { &vop_mknod_desc, coda_vop_error }, /* mknod */
124 { &vop_open_desc, coda_open }, /* open */
125 { &vop_close_desc, coda_close }, /* close */
126 { &vop_access_desc, coda_access }, /* access */
127 { &vop_getattr_desc, coda_getattr }, /* getattr */
128 { &vop_setattr_desc, coda_setattr }, /* setattr */
129 { &vop_read_desc, coda_read }, /* read */
130 { &vop_write_desc, coda_write }, /* write */
131 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
132 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */
133 /* 1.3 { &vop_select_desc, coda_select }, select */
134 { &vop_mmap_desc, genfs_mmap }, /* mmap */
135 { &vop_fsync_desc, coda_fsync }, /* fsync */
136 { &vop_remove_desc, coda_remove }, /* remove */
137 { &vop_link_desc, coda_link }, /* link */
138 { &vop_rename_desc, coda_rename }, /* rename */
139 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */
140 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */
141 { &vop_symlink_desc, coda_symlink }, /* symlink */
142 { &vop_readdir_desc, coda_readdir }, /* readdir */
143 { &vop_readlink_desc, coda_readlink }, /* readlink */
144 { &vop_abortop_desc, coda_abortop }, /* abortop */
145 { &vop_inactive_desc, coda_inactive }, /* inactive */
146 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */
147 { &vop_lock_desc, coda_lock }, /* lock */
148 { &vop_unlock_desc, coda_unlock }, /* unlock */
149 { &vop_bmap_desc, coda_bmap }, /* bmap */
150 { &vop_strategy_desc, coda_strategy }, /* strategy */
151 { &vop_print_desc, coda_vop_error }, /* print */
152 { &vop_islocked_desc, coda_islocked }, /* islocked */
153 { &vop_pathconf_desc, coda_vop_error }, /* pathconf */
154 { &vop_advlock_desc, coda_vop_nop }, /* advlock */
155 { &vop_bwrite_desc, coda_vop_error }, /* bwrite */
156 { &vop_lease_desc, coda_vop_nop }, /* lease */
157 { &vop_seek_desc, genfs_seek }, /* seek */
158 { &vop_poll_desc, genfs_poll }, /* poll */
159 { &vop_getpages_desc, coda_getpages }, /* getpages */
160 { &vop_putpages_desc, coda_putpages }, /* putpages */
161 { NULL, NULL }
162 };
163
164 const struct vnodeopv_desc coda_vnodeop_opv_desc =
165 { &coda_vnodeop_p, coda_vnodeop_entries };
166
167 /* Definitions of NetBSD vnodeop interfaces */
168
169 /* A generic panic: we were called with something we didn't define yet */
170 int
171 coda_vop_error(void *anon) {
172 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
173
174 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n",
175 (*desc)->vdesc_name));
176 /*
177 panic("coda_nbsd_vop_error");
178 return 0;
179 */
180 return EIO;
181 }
182
183 /* A generic do-nothing. For lease_check, advlock */
184 int
185 coda_vop_nop(void *anon) {
186 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
187
188 if (codadebug) {
189 myprintf(("Vnode operation %s called, but unsupported\n",
190 (*desc)->vdesc_name));
191 }
192 return (0);
193 }
194
195 int
196 coda_vnodeopstats_init(void)
197 {
198 int i;
199
200 for(i=0;i<CODA_VNODEOPS_SIZE;i++) {
201 coda_vnodeopstats[i].opcode = i;
202 coda_vnodeopstats[i].entries = 0;
203 coda_vnodeopstats[i].sat_intrn = 0;
204 coda_vnodeopstats[i].unsat_intrn = 0;
205 coda_vnodeopstats[i].gen_intrn = 0;
206 }
207
208 return 0;
209 }
210
211 /*
212 * coda_open calls Venus to return the device, inode pair of the cache
213 * file holding the data. Using iget, coda_open finds the vnode of the
214 * cache file, and then opens it.
215 */
216 int
217 coda_open(void *v)
218 {
219 /*
220 * NetBSD can pass the O_EXCL flag in mode, even though the check
221 * has already happened. Venus defensively assumes that if open
222 * is passed the EXCL, it must be a bug. We strip the flag here.
223 */
224 /* true args */
225 struct vop_open_args *ap = v;
226 struct vnode **vpp = &(ap->a_vp);
227 struct cnode *cp = VTOC(*vpp);
228 int flag = ap->a_mode & (~O_EXCL);
229 kauth_cred_t cred = ap->a_cred;
230 struct lwp *l = ap->a_l;
231 /* locals */
232 int error;
233 struct vnode *vp;
234 dev_t dev;
235 ino_t inode;
236
237 MARK_ENTRY(CODA_OPEN_STATS);
238
239 /* Check for open of control file. */
240 if (IS_CTL_VP(*vpp)) {
241 /* XXX */
242 /* if (WRITABLE(flag)) */
243 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) {
244 MARK_INT_FAIL(CODA_OPEN_STATS);
245 return(EACCES);
246 }
247 MARK_INT_SAT(CODA_OPEN_STATS);
248 return(0);
249 }
250
251 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, l, &dev, &inode);
252 if (error)
253 return (error);
254 if (!error) {
255 CODADEBUG( CODA_OPEN,myprintf(("open: dev %d inode %llu result %d\n",
256 dev, (unsigned long long)inode, error)); )
257 }
258
259 /* Translate the <device, inode> pair for the cache file into
260 an inode pointer. */
261 error = coda_grab_vnode(dev, inode, &vp);
262 if (error)
263 return (error);
264
265 /* We get the vnode back locked in both Mach and NetBSD. Needs unlocked */
266 VOP_UNLOCK(vp, 0);
267 /* Keep a reference until the close comes in. */
268 vref(*vpp);
269
270 /* Save the vnode pointer for the cache file. */
271 if (cp->c_ovp == NULL) {
272 cp->c_ovp = vp;
273 } else {
274 if (cp->c_ovp != vp)
275 panic("coda_open: cp->c_ovp != ITOV(ip)");
276 }
277 cp->c_ocount++;
278
279 /* Flush the attribute cached if writing the file. */
280 if (flag & FWRITE) {
281 cp->c_owrite++;
282 cp->c_flags &= ~C_VATTR;
283 }
284
285 /* Save the <device, inode> pair for the cache file to speed
286 up subsequent page_read's. */
287 cp->c_device = dev;
288 cp->c_inode = inode;
289
290 /* Open the cache file. */
291 error = VOP_OPEN(vp, flag, cred, l);
292 return(error);
293 }
294
295 /*
296 * Close the cache file used for I/O and notify Venus.
297 */
298 int
299 coda_close(void *v)
300 {
301 /* true args */
302 struct vop_close_args *ap = v;
303 struct vnode *vp = ap->a_vp;
304 struct cnode *cp = VTOC(vp);
305 int flag = ap->a_fflag;
306 kauth_cred_t cred = ap->a_cred;
307 struct lwp *l = ap->a_l;
308 /* locals */
309 int error;
310
311 MARK_ENTRY(CODA_CLOSE_STATS);
312
313 /* Check for close of control file. */
314 if (IS_CTL_VP(vp)) {
315 MARK_INT_SAT(CODA_CLOSE_STATS);
316 return(0);
317 }
318
319 if (IS_UNMOUNTING(cp)) {
320 if (cp->c_ovp) {
321 #ifdef CODA_VERBOSE
322 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n",
323 vp->v_usecount, cp->c_ovp, vp, cp);
324 #endif
325 #ifdef hmm
326 vgone(cp->c_ovp);
327 #else
328 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY);
329 VOP_CLOSE(cp->c_ovp, flag, cred, l); /* Do errors matter here? */
330 vput(cp->c_ovp);
331 #endif
332 } else {
333 #ifdef CODA_VERBOSE
334 printf("coda_close: NO container vp %p/cp %p\n", vp, cp);
335 #endif
336 }
337 return ENODEV;
338 } else {
339 vn_lock(cp->c_ovp, LK_EXCLUSIVE | LK_RETRY);
340 VOP_CLOSE(cp->c_ovp, flag, cred, l); /* Do errors matter here? */
341 vput(cp->c_ovp);
342 }
343
344 if (--cp->c_ocount == 0)
345 cp->c_ovp = NULL;
346
347 if (flag & FWRITE) /* file was opened for write */
348 --cp->c_owrite;
349
350 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, l);
351 vrele(CTOV(cp));
352
353 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); )
354 return(error);
355 }
356
357 int
358 coda_read(void *v)
359 {
360 struct vop_read_args *ap = v;
361
362 ENTRY;
363 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ,
364 ap->a_ioflag, ap->a_cred, curlwp));
365 }
366
367 int
368 coda_write(void *v)
369 {
370 struct vop_write_args *ap = v;
371
372 ENTRY;
373 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE,
374 ap->a_ioflag, ap->a_cred, curlwp));
375 }
376
377 int
378 coda_rdwr(struct vnode *vp, struct uio *uiop, enum uio_rw rw, int ioflag,
379 kauth_cred_t cred, struct lwp *l)
380 {
381 /* upcall decl */
382 /* NOTE: container file operation!!! */
383 /* locals */
384 struct cnode *cp = VTOC(vp);
385 struct vnode *cfvp = cp->c_ovp;
386 struct proc *p = l->l_proc;
387 int opened_internally = 0;
388 int error = 0;
389
390 MARK_ENTRY(CODA_RDWR_STATS);
391
392 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %lu, %lld)\n", rw,
393 uiop->uio_iov->iov_base,
394 (unsigned long) uiop->uio_resid,
395 (long long) uiop->uio_offset)); )
396
397 /* Check for rdwr of control object. */
398 if (IS_CTL_VP(vp)) {
399 MARK_INT_FAIL(CODA_RDWR_STATS);
400 return(EINVAL);
401 }
402
403 /* Redirect the request to UFS. */
404
405 /*
406 * If file is not already open this must be a page
407 * {read,write} request. Iget the cache file's inode
408 * pointer if we still have its <device, inode> pair.
409 * Otherwise, we must do an internal open to derive the
410 * pair.
411 */
412 if (cfvp == NULL) {
413 /*
414 * If we're dumping core, do the internal open. Otherwise
415 * venus won't have the correct size of the core when
416 * it's completely written.
417 */
418 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) {
419 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp);
420 if (error) {
421 MARK_INT_FAIL(CODA_RDWR_STATS);
422 return(error);
423 }
424 /*
425 * We get the vnode back locked in both Mach and
426 * NetBSD. Needs unlocked
427 */
428 VOP_UNLOCK(cfvp, 0);
429 }
430 else {
431 opened_internally = 1;
432 MARK_INT_GEN(CODA_OPEN_STATS);
433 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE),
434 cred, l);
435 #ifdef CODA_VERBOSE
436 printf("coda_rdwr: Internally Opening %p\n", vp);
437 #endif
438 if (error) {
439 MARK_INT_FAIL(CODA_RDWR_STATS);
440 return(error);
441 }
442 cfvp = cp->c_ovp;
443 }
444 }
445
446 /* Have UFS handle the call. */
447 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = %s, refcnt = %d\n",
448 coda_f2s(&cp->c_fid), CTOV(cp)->v_usecount)); )
449
450 if (rw == UIO_READ) {
451 error = VOP_READ(cfvp, uiop, ioflag, cred);
452 } else {
453 error = VOP_WRITE(cfvp, uiop, ioflag, cred);
454 }
455
456 if (error)
457 MARK_INT_FAIL(CODA_RDWR_STATS);
458 else
459 MARK_INT_SAT(CODA_RDWR_STATS);
460
461 /* Do an internal close if necessary. */
462 if (opened_internally) {
463 MARK_INT_GEN(CODA_CLOSE_STATS);
464 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, l);
465 }
466
467 /* Invalidate cached attributes if writing. */
468 if (rw == UIO_WRITE)
469 cp->c_flags &= ~C_VATTR;
470 return(error);
471 }
472
473 int
474 coda_ioctl(void *v)
475 {
476 /* true args */
477 struct vop_ioctl_args *ap = v;
478 struct vnode *vp = ap->a_vp;
479 int com = ap->a_command;
480 caddr_t data = ap->a_data;
481 int flag = ap->a_fflag;
482 kauth_cred_t cred = ap->a_cred;
483 struct lwp *l = ap->a_l;
484 /* locals */
485 int error;
486 struct vnode *tvp;
487 struct nameidata ndp;
488 struct PioctlData *iap = (struct PioctlData *)data;
489
490 MARK_ENTRY(CODA_IOCTL_STATS);
491
492 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));)
493
494 /* Don't check for operation on a dying object, for ctlvp it
495 shouldn't matter */
496
497 /* Must be control object to succeed. */
498 if (!IS_CTL_VP(vp)) {
499 MARK_INT_FAIL(CODA_IOCTL_STATS);
500 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));)
501 return (EOPNOTSUPP);
502 }
503 /* Look up the pathname. */
504
505 /* Should we use the name cache here? It would get it from
506 lookupname sooner or later anyway, right? */
507
508 NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE,
509 iap->path, l);
510 error = namei(&ndp);
511 tvp = ndp.ni_vp;
512
513 if (error) {
514 MARK_INT_FAIL(CODA_IOCTL_STATS);
515 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n",
516 error));)
517 return(error);
518 }
519
520 /*
521 * Make sure this is a coda style cnode, but it may be a
522 * different vfsp
523 */
524 /* XXX: this totally violates the comment about vtagtype in vnode.h */
525 if (tvp->v_tag != VT_CODA) {
526 vrele(tvp);
527 MARK_INT_FAIL(CODA_IOCTL_STATS);
528 CODADEBUG(CODA_IOCTL,
529 myprintf(("coda_ioctl error: %s not a coda object\n",
530 iap->path));)
531 return(EINVAL);
532 }
533
534 if (iap->vi.in_size > VC_MAXDATASIZE) {
535 vrele(tvp);
536 return(EINVAL);
537 }
538 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, l);
539
540 if (error)
541 MARK_INT_FAIL(CODA_IOCTL_STATS);
542 else
543 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); )
544
545 vrele(tvp);
546 return(error);
547 }
548
549 /*
550 * To reduce the cost of a user-level venus;we cache attributes in
551 * the kernel. Each cnode has storage allocated for an attribute. If
552 * c_vattr is valid, return a reference to it. Otherwise, get the
553 * attributes from venus and store them in the cnode. There is some
554 * question if this method is a security leak. But I think that in
555 * order to make this call, the user must have done a lookup and
556 * opened the file, and therefore should already have access.
557 */
558 int
559 coda_getattr(void *v)
560 {
561 /* true args */
562 struct vop_getattr_args *ap = v;
563 struct vnode *vp = ap->a_vp;
564 struct cnode *cp = VTOC(vp);
565 struct vattr *vap = ap->a_vap;
566 kauth_cred_t cred = ap->a_cred;
567 struct lwp *l = ap->a_l;
568 /* locals */
569 int error;
570
571 MARK_ENTRY(CODA_GETATTR_STATS);
572
573 /* Check for getattr of control object. */
574 if (IS_CTL_VP(vp)) {
575 MARK_INT_FAIL(CODA_GETATTR_STATS);
576 return(ENOENT);
577 }
578
579 /* Check to see if the attributes have already been cached */
580 if (VALID_VATTR(cp)) {
581 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: %s\n",
582 coda_f2s(&cp->c_fid)));});
583 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
584 print_vattr(&cp->c_vattr); );
585
586 *vap = cp->c_vattr;
587 MARK_INT_SAT(CODA_GETATTR_STATS);
588 return(0);
589 }
590
591 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, l, vap);
592
593 if (!error) {
594 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss %s: result %d\n",
595 coda_f2s(&cp->c_fid), error)); )
596
597 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
598 print_vattr(vap); );
599
600 /* If not open for write, store attributes in cnode */
601 if ((cp->c_owrite == 0) && (coda_attr_cache)) {
602 cp->c_vattr = *vap;
603 cp->c_flags |= C_VATTR;
604 }
605
606 }
607 return(error);
608 }
609
610 int
611 coda_setattr(void *v)
612 {
613 /* true args */
614 struct vop_setattr_args *ap = v;
615 struct vnode *vp = ap->a_vp;
616 struct cnode *cp = VTOC(vp);
617 struct vattr *vap = ap->a_vap;
618 kauth_cred_t cred = ap->a_cred;
619 struct lwp *l = ap->a_l;
620 /* locals */
621 int error;
622
623 MARK_ENTRY(CODA_SETATTR_STATS);
624
625 /* Check for setattr of control object. */
626 if (IS_CTL_VP(vp)) {
627 MARK_INT_FAIL(CODA_SETATTR_STATS);
628 return(ENOENT);
629 }
630
631 if (codadebug & CODADBGMSK(CODA_SETATTR)) {
632 print_vattr(vap);
633 }
634 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, l);
635
636 if (!error)
637 cp->c_flags &= ~C_VATTR;
638
639 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); )
640 return(error);
641 }
642
643 int
644 coda_access(void *v)
645 {
646 /* true args */
647 struct vop_access_args *ap = v;
648 struct vnode *vp = ap->a_vp;
649 struct cnode *cp = VTOC(vp);
650 int mode = ap->a_mode;
651 kauth_cred_t cred = ap->a_cred;
652 struct lwp *l = ap->a_l;
653 /* locals */
654 int error;
655
656 MARK_ENTRY(CODA_ACCESS_STATS);
657
658 /* Check for access of control object. Only read access is
659 allowed on it. */
660 if (IS_CTL_VP(vp)) {
661 /* bogus hack - all will be marked as successes */
662 MARK_INT_SAT(CODA_ACCESS_STATS);
663 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC)))
664 ? 0 : EACCES);
665 }
666
667 /*
668 * if the file is a directory, and we are checking exec (eg lookup)
669 * access, and the file is in the namecache, then the user must have
670 * lookup access to it.
671 */
672 if (coda_access_cache) {
673 if ((vp->v_type == VDIR) && (mode & VEXEC)) {
674 if (coda_nc_lookup(cp, ".", 1, cred)) {
675 MARK_INT_SAT(CODA_ACCESS_STATS);
676 return(0); /* it was in the cache */
677 }
678 }
679 }
680
681 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, l);
682
683 return(error);
684 }
685
686 /*
687 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually
688 * done. If a buffer has been saved in anticipation of a coda_create or
689 * a coda_remove, delete it.
690 */
691 /* ARGSUSED */
692 int
693 coda_abortop(void *v)
694 {
695 /* true args */
696 struct vop_abortop_args /* {
697 struct vnode *a_dvp;
698 struct componentname *a_cnp;
699 } */ *ap = v;
700 /* upcall decl */
701 /* locals */
702
703 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)
704 PNBUF_PUT(ap->a_cnp->cn_pnbuf);
705 return (0);
706 }
707
708 int
709 coda_readlink(void *v)
710 {
711 /* true args */
712 struct vop_readlink_args *ap = v;
713 struct vnode *vp = ap->a_vp;
714 struct cnode *cp = VTOC(vp);
715 struct uio *uiop = ap->a_uio;
716 kauth_cred_t cred = ap->a_cred;
717 /* locals */
718 struct lwp *l = curlwp;
719 int error;
720 char *str;
721 int len;
722
723 MARK_ENTRY(CODA_READLINK_STATS);
724
725 /* Check for readlink of control object. */
726 if (IS_CTL_VP(vp)) {
727 MARK_INT_FAIL(CODA_READLINK_STATS);
728 return(ENOENT);
729 }
730
731 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */
732 uiop->uio_rw = UIO_READ;
733 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop);
734 if (error)
735 MARK_INT_FAIL(CODA_READLINK_STATS);
736 else
737 MARK_INT_SAT(CODA_READLINK_STATS);
738 return(error);
739 }
740
741 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, l, &str, &len);
742
743 if (!error) {
744 uiop->uio_rw = UIO_READ;
745 error = uiomove(str, len, uiop);
746
747 if (coda_symlink_cache) {
748 cp->c_symlink = str;
749 cp->c_symlen = len;
750 cp->c_flags |= C_SYMLINK;
751 } else
752 CODA_FREE(str, len);
753 }
754
755 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));)
756 return(error);
757 }
758
759 int
760 coda_fsync(void *v)
761 {
762 /* true args */
763 struct vop_fsync_args *ap = v;
764 struct vnode *vp = ap->a_vp;
765 struct cnode *cp = VTOC(vp);
766 kauth_cred_t cred = ap->a_cred;
767 struct lwp *l = ap->a_l;
768 /* locals */
769 struct vnode *convp = cp->c_ovp;
770 int error;
771
772 MARK_ENTRY(CODA_FSYNC_STATS);
773
774 /* Check for fsync on an unmounting object */
775 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync
776 * after an unmount has been initiated. This is a Bad Thing,
777 * which we have to avoid. Not a legitimate failure for stats.
778 */
779 if (IS_UNMOUNTING(cp)) {
780 return(ENODEV);
781 }
782
783 /* Check for fsync of control object. */
784 if (IS_CTL_VP(vp)) {
785 MARK_INT_SAT(CODA_FSYNC_STATS);
786 return(0);
787 }
788
789 if (convp)
790 VOP_FSYNC(convp, cred, MNT_WAIT, 0, 0, l);
791
792 /*
793 * We can expect fsync on any vnode at all if venus is pruging it.
794 * Venus can't very well answer the fsync request, now can it?
795 * Hopefully, it won't have to, because hopefully, venus preserves
796 * the (possibly untrue) invariant that it never purges an open
797 * vnode. Hopefully.
798 */
799 if (cp->c_flags & C_PURGING) {
800 return(0);
801 }
802
803 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, l);
804
805 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); );
806 return(error);
807 }
808
809 int
810 coda_inactive(void *v)
811 {
812 /* XXX - at the moment, inactive doesn't look at cred, and doesn't
813 have a proc pointer. Oops. */
814 /* true args */
815 struct vop_inactive_args *ap = v;
816 struct vnode *vp = ap->a_vp;
817 struct cnode *cp = VTOC(vp);
818 kauth_cred_t cred __attribute__((unused)) = NULL;
819 struct lwp *l __attribute__((unused)) = curlwp;
820 /* upcall decl */
821 /* locals */
822
823 /* We don't need to send inactive to venus - DCS */
824 MARK_ENTRY(CODA_INACTIVE_STATS);
825
826 if (IS_CTL_VP(vp)) {
827 MARK_INT_SAT(CODA_INACTIVE_STATS);
828 return 0;
829 }
830
831 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %s, vfsp %p\n",
832 coda_f2s(&cp->c_fid), vp->v_mount));)
833
834 /* If an array has been allocated to hold the symlink, deallocate it */
835 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) {
836 if (cp->c_symlink == NULL)
837 panic("coda_inactive: null symlink pointer in cnode");
838
839 CODA_FREE(cp->c_symlink, cp->c_symlen);
840 cp->c_flags &= ~C_SYMLINK;
841 cp->c_symlen = 0;
842 }
843
844 /* Remove it from the table so it can't be found. */
845 coda_unsave(cp);
846 if (vp->v_mount->mnt_data == NULL) {
847 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp));
848 panic("badness in coda_inactive");
849 }
850
851 if (IS_UNMOUNTING(cp)) {
852 #ifdef DEBUG
853 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp);
854 if (cp->c_ovp != NULL)
855 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n",
856 vp->v_usecount, vp, cp);
857 #endif
858 lockmgr(&vp->v_lock, LK_RELEASE, &vp->v_interlock);
859 } else {
860 #ifdef OLD_DIAGNOSTIC
861 if (CTOV(cp)->v_usecount) {
862 panic("coda_inactive: nonzero reference count");
863 }
864 if (cp->c_ovp != NULL) {
865 panic("coda_inactive: cp->ovp != NULL");
866 }
867 #endif
868 VOP_UNLOCK(vp, 0);
869 vgone(vp);
870 }
871
872 MARK_INT_SAT(CODA_INACTIVE_STATS);
873 return(0);
874 }
875
876 /*
877 * Remote file system operations having to do with directory manipulation.
878 */
879
880 /*
881 * It appears that in NetBSD, lookup is supposed to return the vnode locked
882 */
883 int
884 coda_lookup(void *v)
885 {
886 /* true args */
887 struct vop_lookup_args *ap = v;
888 struct vnode *dvp = ap->a_dvp;
889 struct cnode *dcp = VTOC(dvp);
890 struct vnode **vpp = ap->a_vpp;
891 /*
892 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest
893 * of the string to xlate, and that we must try to get at least
894 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I
895 * could be wrong.
896 */
897 struct componentname *cnp = ap->a_cnp;
898 kauth_cred_t cred = cnp->cn_cred;
899 struct lwp *l = cnp->cn_lwp;
900 /* locals */
901 struct cnode *cp;
902 const char *nm = cnp->cn_nameptr;
903 int len = cnp->cn_namelen;
904 CodaFid VFid;
905 int vtype;
906 int error = 0;
907
908 MARK_ENTRY(CODA_LOOKUP_STATS);
909
910 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %s\n",
911 nm, coda_f2s(&dcp->c_fid))););
912
913 /* Check for lookup of control object. */
914 if (IS_CTL_NAME(dvp, nm, len)) {
915 *vpp = coda_ctlvp;
916 vref(*vpp);
917 MARK_INT_SAT(CODA_LOOKUP_STATS);
918 goto exit;
919 }
920
921 if (len+1 > CODA_MAXNAMLEN) {
922 MARK_INT_FAIL(CODA_LOOKUP_STATS);
923 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %s (%s)\n",
924 coda_f2s(&dcp->c_fid), nm)););
925 *vpp = (struct vnode *)0;
926 error = EINVAL;
927 goto exit;
928 }
929 /* First try to look the file up in the cfs name cache */
930 /* lock the parent vnode? */
931 cp = coda_nc_lookup(dcp, nm, len, cred);
932 if (cp) {
933 *vpp = CTOV(cp);
934 vref(*vpp);
935 CODADEBUG(CODA_LOOKUP,
936 myprintf(("lookup result %d vpp %p\n",error,*vpp));)
937 } else {
938
939 /* The name wasn't cached, so we need to contact Venus */
940 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, l, &VFid, &vtype);
941
942 if (error) {
943 MARK_INT_FAIL(CODA_LOOKUP_STATS);
944 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %s (%s)%d\n",
945 coda_f2s(&dcp->c_fid), nm, error));)
946 *vpp = (struct vnode *)0;
947 } else {
948 MARK_INT_SAT(CODA_LOOKUP_STATS);
949 CODADEBUG(CODA_LOOKUP,
950 myprintf(("lookup: %s type %o result %d\n",
951 coda_f2s(&VFid), vtype, error)); )
952
953 cp = make_coda_node(&VFid, dvp->v_mount, vtype);
954 *vpp = CTOV(cp);
955
956 /* enter the new vnode in the Name Cache only if the top bit isn't set */
957 /* And don't enter a new vnode for an invalid one! */
958 if (!(vtype & CODA_NOCACHE))
959 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
960 }
961 }
962
963 exit:
964 /*
965 * If we are creating, and this was the last name to be looked up,
966 * and the error was ENOENT, then there really shouldn't be an
967 * error and we can make the leaf NULL and return success. Since
968 * this is supposed to work under Mach as well as NetBSD, we're
969 * leaving this fn wrapped. We also must tell lookup/namei that
970 * we need to save the last component of the name. (Create will
971 * have to free the name buffer later...lucky us...)
972 */
973 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME))
974 && (cnp->cn_flags & ISLASTCN)
975 && (error == ENOENT))
976 {
977 error = EJUSTRETURN;
978 cnp->cn_flags |= SAVENAME;
979 *ap->a_vpp = NULL;
980 }
981
982 /*
983 * If we are removing, and we are at the last element, and we
984 * found it, then we need to keep the name around so that the
985 * removal will go ahead as planned. Unfortunately, this will
986 * probably also lock the to-be-removed vnode, which may or may
987 * not be a good idea. I'll have to look at the bits of
988 * coda_remove to make sure. We'll only save the name if we did in
989 * fact find the name, otherwise coda_remove won't have a chance
990 * to free the pathname.
991 */
992 if ((cnp->cn_nameiop == DELETE)
993 && (cnp->cn_flags & ISLASTCN)
994 && !error)
995 {
996 cnp->cn_flags |= SAVENAME;
997 }
998
999 /*
1000 * If the lookup went well, we need to lock the child.
1001 */
1002 if (!error || (error == EJUSTRETURN)) {
1003 /* The parent is locked, and may be the same as the child */
1004 if (*ap->a_vpp && (*ap->a_vpp != dvp)) {
1005 /* Different, go ahead and lock it. */
1006 vn_lock(*ap->a_vpp, LK_EXCLUSIVE|LK_RETRY);
1007 }
1008 } else {
1009 /* If the lookup failed, we need to ensure that the leaf is NULL */
1010 /* Don't change any locking? */
1011 *ap->a_vpp = NULL;
1012 }
1013 return(error);
1014 }
1015
1016 /*ARGSUSED*/
1017 int
1018 coda_create(void *v)
1019 {
1020 /* true args */
1021 struct vop_create_args *ap = v;
1022 struct vnode *dvp = ap->a_dvp;
1023 struct cnode *dcp = VTOC(dvp);
1024 struct vattr *va = ap->a_vap;
1025 int exclusive = 1;
1026 int mode = ap->a_vap->va_mode;
1027 struct vnode **vpp = ap->a_vpp;
1028 struct componentname *cnp = ap->a_cnp;
1029 kauth_cred_t cred = cnp->cn_cred;
1030 struct lwp *l = cnp->cn_lwp;
1031 /* locals */
1032 int error;
1033 struct cnode *cp;
1034 const char *nm = cnp->cn_nameptr;
1035 int len = cnp->cn_namelen;
1036 CodaFid VFid;
1037 struct vattr attr;
1038
1039 MARK_ENTRY(CODA_CREATE_STATS);
1040
1041 /* All creates are exclusive XXX */
1042 /* I'm assuming the 'mode' argument is the file mode bits XXX */
1043
1044 /* Check for create of control object. */
1045 if (IS_CTL_NAME(dvp, nm, len)) {
1046 *vpp = (struct vnode *)0;
1047 MARK_INT_FAIL(CODA_CREATE_STATS);
1048 return(EACCES);
1049 }
1050
1051 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, l, &VFid, &attr);
1052
1053 if (!error) {
1054
1055 /* If this is an exclusive create, panic if the file already exists. */
1056 /* Venus should have detected the file and reported EEXIST. */
1057
1058 if ((exclusive == 1) &&
1059 (coda_find(&VFid) != NULL))
1060 panic("cnode existed for newly created file!");
1061
1062 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type);
1063 *vpp = CTOV(cp);
1064
1065 /* Update va to reflect the new attributes. */
1066 (*va) = attr;
1067
1068 /* Update the attribute cache and mark it as valid */
1069 if (coda_attr_cache) {
1070 VTOC(*vpp)->c_vattr = attr;
1071 VTOC(*vpp)->c_flags |= C_VATTR;
1072 }
1073
1074 /* Invalidate the parent's attr cache, the modification time has changed */
1075 VTOC(dvp)->c_flags &= ~C_VATTR;
1076
1077 /* enter the new vnode in the Name Cache */
1078 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1079
1080 CODADEBUG(CODA_CREATE,
1081 myprintf(("create: %s, result %d\n",
1082 coda_f2s(&VFid), error)); )
1083 } else {
1084 *vpp = (struct vnode *)0;
1085 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));)
1086 }
1087
1088 /* Locking strategy. */
1089 /*
1090 * In NetBSD, all creates must explicitly vput their dvp's. We'll
1091 * go ahead and use the LOCKLEAF flag of the cnp argument.
1092 * However, I'm pretty sure that create must return the leaf
1093 * locked; so there is a DIAGNOSTIC check to ensure that this is
1094 * true.
1095 */
1096 vput(dvp);
1097 if (!error) {
1098 if (cnp->cn_flags & LOCKLEAF) {
1099 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) {
1100 printf("coda_create: ");
1101 panic("unlocked parent but couldn't lock child");
1102 }
1103 }
1104 #ifdef OLD_DIAGNOSTIC
1105 else {
1106 printf("coda_create: LOCKLEAF not set!\n");
1107 }
1108 #endif
1109 }
1110 /* Have to free the previously saved name */
1111 /*
1112 * This condition is stolen from ufs_makeinode. I have no idea
1113 * why it's here, but what the hey...
1114 */
1115 if ((cnp->cn_flags & SAVESTART) == 0) {
1116 PNBUF_PUT(cnp->cn_pnbuf);
1117 }
1118 return(error);
1119 }
1120
1121 int
1122 coda_remove(void *v)
1123 {
1124 /* true args */
1125 struct vop_remove_args *ap = v;
1126 struct vnode *dvp = ap->a_dvp;
1127 struct cnode *cp = VTOC(dvp);
1128 struct componentname *cnp = ap->a_cnp;
1129 kauth_cred_t cred = cnp->cn_cred;
1130 struct lwp *l = cnp->cn_lwp;
1131 /* locals */
1132 int error;
1133 const char *nm = cnp->cn_nameptr;
1134 int len = cnp->cn_namelen;
1135 struct cnode *tp;
1136
1137 MARK_ENTRY(CODA_REMOVE_STATS);
1138
1139 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %s\n",
1140 nm, coda_f2s(&cp->c_fid))););
1141
1142 /* Remove the file's entry from the CODA Name Cache */
1143 /* We're being conservative here, it might be that this person
1144 * doesn't really have sufficient access to delete the file
1145 * but we feel zapping the entry won't really hurt anyone -- dcs
1146 */
1147 /* I'm gonna go out on a limb here. If a file and a hardlink to it
1148 * exist, and one is removed, the link count on the other will be
1149 * off by 1. We could either invalidate the attrs if cached, or
1150 * fix them. I'll try to fix them. DCS 11/8/94
1151 */
1152 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred);
1153 if (tp) {
1154 if (VALID_VATTR(tp)) { /* If attrs are cached */
1155 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */
1156 tp->c_vattr.va_nlink--;
1157 }
1158 }
1159
1160 coda_nc_zapfile(VTOC(dvp), nm, len);
1161 /* No need to flush it if it doesn't exist! */
1162 }
1163 /* Invalidate the parent's attr cache, the modification time has changed */
1164 VTOC(dvp)->c_flags &= ~C_VATTR;
1165
1166 /* Check for remove of control object. */
1167 if (IS_CTL_NAME(dvp, nm, len)) {
1168 MARK_INT_FAIL(CODA_REMOVE_STATS);
1169 return(ENOENT);
1170 }
1171
1172 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, l);
1173
1174 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); )
1175
1176 /*
1177 * Regardless of what happens, we have to unconditionally drop
1178 * locks/refs on parent and child. (I hope). This is based on
1179 * what ufs_remove seems to be doing.
1180 */
1181 if (dvp == ap->a_vp) {
1182 vrele(ap->a_vp);
1183 } else {
1184 vput(ap->a_vp);
1185 }
1186 vput(dvp);
1187
1188 if ((cnp->cn_flags & SAVESTART) == 0) {
1189 PNBUF_PUT(cnp->cn_pnbuf);
1190 }
1191 return(error);
1192 }
1193
1194 int
1195 coda_link(void *v)
1196 {
1197 /* true args */
1198 struct vop_link_args *ap = v;
1199 struct vnode *vp = ap->a_vp;
1200 struct cnode *cp = VTOC(vp);
1201 struct vnode *tdvp = ap->a_dvp;
1202 struct cnode *tdcp = VTOC(tdvp);
1203 struct componentname *cnp = ap->a_cnp;
1204 kauth_cred_t cred = cnp->cn_cred;
1205 struct lwp *l = cnp->cn_lwp;
1206 /* locals */
1207 int error;
1208 const char *nm = cnp->cn_nameptr;
1209 int len = cnp->cn_namelen;
1210
1211 MARK_ENTRY(CODA_LINK_STATS);
1212
1213 if (codadebug & CODADBGMSK(CODA_LINK)) {
1214
1215 myprintf(("nb_link: vp fid: %s\n",
1216 coda_f2s(&cp->c_fid)));
1217 myprintf(("nb_link: tdvp fid: %s)\n",
1218 coda_f2s(&tdcp->c_fid)));
1219
1220 }
1221 if (codadebug & CODADBGMSK(CODA_LINK)) {
1222 myprintf(("link: vp fid: %s\n",
1223 coda_f2s(&cp->c_fid)));
1224 myprintf(("link: tdvp fid: %s\n",
1225 coda_f2s(&tdcp->c_fid)));
1226
1227 }
1228
1229 /* Check for link to/from control object. */
1230 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) {
1231 MARK_INT_FAIL(CODA_LINK_STATS);
1232 return(EACCES);
1233 }
1234
1235 /*
1236 * According to the ufs_link operation here's the locking situation:
1237 * We enter with the thing called "dvp" (the directory) locked.
1238 * We must unconditionally drop locks on "dvp"
1239 *
1240 * We enter with the thing called "vp" (the linked-to) unlocked,
1241 * but ref'd (?)
1242 * We seem to need to lock it before calling coda_link, and
1243 * unconditionally unlock it after.
1244 */
1245
1246 if ((ap->a_vp != tdvp) && (error = vn_lock(ap->a_vp, LK_EXCLUSIVE))) {
1247 goto exit;
1248 }
1249
1250 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, l);
1251
1252 /* Invalidate the parent's attr cache, the modification time has changed */
1253 VTOC(tdvp)->c_flags &= ~C_VATTR;
1254 VTOC(vp)->c_flags &= ~C_VATTR;
1255
1256 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); )
1257
1258 exit:
1259
1260 if (ap->a_vp != tdvp) {
1261 VOP_UNLOCK(ap->a_vp, 0);
1262 }
1263 vput(tdvp);
1264
1265 /* Drop the name buffer if we don't need to SAVESTART */
1266 if ((cnp->cn_flags & SAVESTART) == 0) {
1267 PNBUF_PUT(cnp->cn_pnbuf);
1268 }
1269 return(error);
1270 }
1271
1272 int
1273 coda_rename(void *v)
1274 {
1275 /* true args */
1276 struct vop_rename_args *ap = v;
1277 struct vnode *odvp = ap->a_fdvp;
1278 struct cnode *odcp = VTOC(odvp);
1279 struct componentname *fcnp = ap->a_fcnp;
1280 struct vnode *ndvp = ap->a_tdvp;
1281 struct cnode *ndcp = VTOC(ndvp);
1282 struct componentname *tcnp = ap->a_tcnp;
1283 kauth_cred_t cred = fcnp->cn_cred;
1284 struct lwp *l = fcnp->cn_lwp;
1285 /* true args */
1286 int error;
1287 const char *fnm = fcnp->cn_nameptr;
1288 int flen = fcnp->cn_namelen;
1289 const char *tnm = tcnp->cn_nameptr;
1290 int tlen = tcnp->cn_namelen;
1291
1292 MARK_ENTRY(CODA_RENAME_STATS);
1293
1294 /* Hmmm. The vnodes are already looked up. Perhaps they are locked?
1295 This could be Bad. XXX */
1296 #ifdef OLD_DIAGNOSTIC
1297 if ((fcnp->cn_cred != tcnp->cn_cred)
1298 || (fcnp->cn_lwp != tcnp->cn_lwp))
1299 {
1300 panic("coda_rename: component names don't agree");
1301 }
1302 #endif
1303
1304 /* Check for rename involving control object. */
1305 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) {
1306 MARK_INT_FAIL(CODA_RENAME_STATS);
1307 return(EACCES);
1308 }
1309
1310 /* Problem with moving directories -- need to flush entry for .. */
1311 if (odvp != ndvp) {
1312 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred);
1313 if (ovcp) {
1314 struct vnode *ovp = CTOV(ovcp);
1315 if ((ovp) &&
1316 (ovp->v_type == VDIR)) /* If it's a directory */
1317 coda_nc_zapfile(VTOC(ovp),"..", 2);
1318 }
1319 }
1320
1321 /* Remove the entries for both source and target files */
1322 coda_nc_zapfile(VTOC(odvp), fnm, flen);
1323 coda_nc_zapfile(VTOC(ndvp), tnm, tlen);
1324
1325 /* Invalidate the parent's attr cache, the modification time has changed */
1326 VTOC(odvp)->c_flags &= ~C_VATTR;
1327 VTOC(ndvp)->c_flags &= ~C_VATTR;
1328
1329 if (flen+1 > CODA_MAXNAMLEN) {
1330 MARK_INT_FAIL(CODA_RENAME_STATS);
1331 error = EINVAL;
1332 goto exit;
1333 }
1334
1335 if (tlen+1 > CODA_MAXNAMLEN) {
1336 MARK_INT_FAIL(CODA_RENAME_STATS);
1337 error = EINVAL;
1338 goto exit;
1339 }
1340
1341 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, l);
1342
1343 exit:
1344 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));)
1345 /* XXX - do we need to call cache pureg on the moved vnode? */
1346 cache_purge(ap->a_fvp);
1347
1348 /* It seems to be incumbent on us to drop locks on all four vnodes */
1349 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */
1350
1351 vrele(ap->a_fvp);
1352 vrele(odvp);
1353
1354 if (ap->a_tvp) {
1355 if (ap->a_tvp == ndvp) {
1356 vrele(ap->a_tvp);
1357 } else {
1358 vput(ap->a_tvp);
1359 }
1360 }
1361
1362 vput(ndvp);
1363 return(error);
1364 }
1365
1366 int
1367 coda_mkdir(void *v)
1368 {
1369 /* true args */
1370 struct vop_mkdir_args *ap = v;
1371 struct vnode *dvp = ap->a_dvp;
1372 struct cnode *dcp = VTOC(dvp);
1373 struct componentname *cnp = ap->a_cnp;
1374 struct vattr *va = ap->a_vap;
1375 struct vnode **vpp = ap->a_vpp;
1376 kauth_cred_t cred = cnp->cn_cred;
1377 struct lwp *l = cnp->cn_lwp;
1378 /* locals */
1379 int error;
1380 const char *nm = cnp->cn_nameptr;
1381 int len = cnp->cn_namelen;
1382 struct cnode *cp;
1383 CodaFid VFid;
1384 struct vattr ova;
1385
1386 MARK_ENTRY(CODA_MKDIR_STATS);
1387
1388 /* Check for mkdir of target object. */
1389 if (IS_CTL_NAME(dvp, nm, len)) {
1390 *vpp = (struct vnode *)0;
1391 MARK_INT_FAIL(CODA_MKDIR_STATS);
1392 return(EACCES);
1393 }
1394
1395 if (len+1 > CODA_MAXNAMLEN) {
1396 *vpp = (struct vnode *)0;
1397 MARK_INT_FAIL(CODA_MKDIR_STATS);
1398 return(EACCES);
1399 }
1400
1401 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, l, &VFid, &ova);
1402
1403 if (!error) {
1404 if (coda_find(&VFid) != NULL)
1405 panic("cnode existed for newly created directory!");
1406
1407
1408 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type);
1409 *vpp = CTOV(cp);
1410
1411 /* enter the new vnode in the Name Cache */
1412 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1413
1414 /* as a side effect, enter "." and ".." for the directory */
1415 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp));
1416 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp));
1417
1418 if (coda_attr_cache) {
1419 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */
1420 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */
1421 }
1422
1423 /* Invalidate the parent's attr cache, the modification time has changed */
1424 VTOC(dvp)->c_flags &= ~C_VATTR;
1425
1426 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: %s result %d\n",
1427 coda_f2s(&VFid), error)); )
1428 } else {
1429 *vpp = (struct vnode *)0;
1430 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));)
1431 }
1432
1433 /*
1434 * Currently, all mkdirs explicitly vput their dvp's.
1435 * It also appears that we *must* lock the vpp, since
1436 * lockleaf isn't set, but someone down the road is going
1437 * to try to unlock the new directory.
1438 */
1439 vput(dvp);
1440 if (!error) {
1441 if ((error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE))) {
1442 panic("coda_mkdir: couldn't lock child");
1443 }
1444 }
1445
1446 /* Have to free the previously saved name */
1447 /*
1448 * ufs_mkdir doesn't check for SAVESTART before freeing the
1449 * pathname buffer, but ufs_create does. For the moment, I'll
1450 * follow their lead, but this seems like it is probably
1451 * incorrect.
1452 */
1453 PNBUF_PUT(cnp->cn_pnbuf);
1454 return(error);
1455 }
1456
1457 int
1458 coda_rmdir(void *v)
1459 {
1460 /* true args */
1461 struct vop_rmdir_args *ap = v;
1462 struct vnode *dvp = ap->a_dvp;
1463 struct cnode *dcp = VTOC(dvp);
1464 struct componentname *cnp = ap->a_cnp;
1465 kauth_cred_t cred = cnp->cn_cred;
1466 struct lwp *l = cnp->cn_lwp;
1467 /* true args */
1468 int error;
1469 const char *nm = cnp->cn_nameptr;
1470 int len = cnp->cn_namelen;
1471 struct cnode *cp;
1472
1473 MARK_ENTRY(CODA_RMDIR_STATS);
1474
1475 /* Check for rmdir of control object. */
1476 if (IS_CTL_NAME(dvp, nm, len)) {
1477 MARK_INT_FAIL(CODA_RMDIR_STATS);
1478 return(ENOENT);
1479 }
1480
1481 /* We're being conservative here, it might be that this person
1482 * doesn't really have sufficient access to delete the file
1483 * but we feel zapping the entry won't really hurt anyone -- dcs
1484 */
1485 /*
1486 * As a side effect of the rmdir, remove any entries for children of
1487 * the directory, especially "." and "..".
1488 */
1489 cp = coda_nc_lookup(dcp, nm, len, cred);
1490 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL);
1491
1492 /* Remove the file's entry from the CODA Name Cache */
1493 coda_nc_zapfile(dcp, nm, len);
1494
1495 /* Invalidate the parent's attr cache, the modification time has changed */
1496 dcp->c_flags &= ~C_VATTR;
1497
1498 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, l);
1499
1500 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); )
1501
1502 /*
1503 * regardless of what happens, we need to drop locks/refs on the
1504 * parent and child. I think.
1505 */
1506 if (dvp == ap->a_vp) {
1507 vrele(ap->a_vp);
1508 } else {
1509 vput(ap->a_vp);
1510 }
1511 vput(dvp);
1512
1513 if ((cnp->cn_flags & SAVESTART) == 0) {
1514 PNBUF_PUT(cnp->cn_pnbuf);
1515 }
1516 return(error);
1517 }
1518
1519 int
1520 coda_symlink(void *v)
1521 {
1522 /* true args */
1523 struct vop_symlink_args *ap = v;
1524 struct vnode *tdvp = ap->a_dvp;
1525 struct cnode *tdcp = VTOC(tdvp);
1526 struct componentname *cnp = ap->a_cnp;
1527 struct vattr *tva = ap->a_vap;
1528 char *path = ap->a_target;
1529 kauth_cred_t cred = cnp->cn_cred;
1530 struct lwp *l = cnp->cn_lwp;
1531 /* locals */
1532 int error;
1533 u_long saved_cn_flags;
1534 /*
1535 * XXX I'm assuming the following things about coda_symlink's
1536 * arguments:
1537 * t(foo) is the new name/parent/etc being created.
1538 * lname is the contents of the new symlink.
1539 */
1540 const char *nm = cnp->cn_nameptr;
1541 int len = cnp->cn_namelen;
1542 int plen = strlen(path);
1543
1544 /* XXX What about the vpp argument? Do we need it? */
1545 /*
1546 * Here's the strategy for the moment: perform the symlink, then
1547 * do a lookup to grab the resulting vnode. I know this requires
1548 * two communications with Venus for a new sybolic link, but
1549 * that's the way the ball bounces. I don't yet want to change
1550 * the way the Mach symlink works. When Mach support is
1551 * deprecated, we should change symlink so that the common case
1552 * returns the resultant vnode in a vpp argument.
1553 */
1554
1555 MARK_ENTRY(CODA_SYMLINK_STATS);
1556
1557 /* Check for symlink of control object. */
1558 if (IS_CTL_NAME(tdvp, nm, len)) {
1559 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1560 return(EACCES);
1561 }
1562
1563 if (plen+1 > CODA_MAXPATHLEN) {
1564 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1565 return(EINVAL);
1566 }
1567
1568 if (len+1 > CODA_MAXNAMLEN) {
1569 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1570 error = EINVAL;
1571 goto exit;
1572 }
1573
1574 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, l);
1575
1576 /* Invalidate the parent's attr cache, the modification time has changed */
1577 tdcp->c_flags &= ~C_VATTR;
1578
1579 if (!error) {
1580 /*
1581 * VOP_SYMLINK is not defined to pay attention to cnp->cn_flags;
1582 * these are defined only for VOP_LOOKUP. We desire to reuse
1583 * cnp for a VOP_LOOKUP operation, and must be sure to not pass
1584 * stray flags passed to us. Such stray flags can occur because
1585 * sys_symlink makes a namei call and then reuses the
1586 * componentname structure.
1587 */
1588 /*
1589 * XXX Arguably we should create our own componentname structure
1590 * and not reuse the one that was passed in.
1591 */
1592 saved_cn_flags = cnp->cn_flags;
1593 cnp->cn_flags &= ~(MODMASK | OPMASK);
1594 cnp->cn_flags |= LOOKUP;
1595 error = VOP_LOOKUP(tdvp, ap->a_vpp, cnp);
1596 cnp->cn_flags = saved_cn_flags;
1597 /* Either an error occurs, or ap->a_vpp is locked. */
1598 }
1599 /* unlock and deference parent */
1600 vput(tdvp);
1601
1602 exit:
1603 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); )
1604 return(error);
1605 }
1606
1607 /*
1608 * Read directory entries.
1609 */
1610 int
1611 coda_readdir(void *v)
1612 {
1613 /* true args */
1614 struct vop_readdir_args *ap = v;
1615 struct vnode *vp = ap->a_vp;
1616 struct cnode *cp = VTOC(vp);
1617 struct uio *uiop = ap->a_uio;
1618 kauth_cred_t cred = ap->a_cred;
1619 int *eofflag = ap->a_eofflag;
1620 off_t **cookies = ap->a_cookies;
1621 int *ncookies = ap->a_ncookies;
1622 /* upcall decl */
1623 /* locals */
1624 struct lwp *l = curlwp;
1625 int error = 0;
1626
1627 MARK_ENTRY(CODA_READDIR_STATS);
1628
1629 CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %lu, %lld)\n", uiop->uio_iov->iov_base, (unsigned long) uiop->uio_resid, (long long) uiop->uio_offset)); )
1630
1631 /* Check for readdir of control object. */
1632 if (IS_CTL_VP(vp)) {
1633 MARK_INT_FAIL(CODA_READDIR_STATS);
1634 return(ENOENT);
1635 }
1636
1637 {
1638 /* Redirect the request to UFS. */
1639
1640 /* If directory is not already open do an "internal open" on it. */
1641 int opened_internally = 0;
1642 if (cp->c_ovp == NULL) {
1643 opened_internally = 1;
1644 MARK_INT_GEN(CODA_OPEN_STATS);
1645 error = VOP_OPEN(vp, FREAD, cred, l);
1646 #ifdef CODA_VERBOSE
1647 printf("coda_readdir: Internally Opening %p\n", vp);
1648 #endif
1649 if (error) return(error);
1650 } else
1651 vp = cp->c_ovp;
1652
1653 /* Have UFS handle the call. */
1654 CODADEBUG(CODA_READDIR, myprintf((
1655 "indirect readdir: fid = %s, refcnt = %d\n",
1656 coda_f2s(&cp->c_fid), vp->v_usecount)); )
1657 error = VOP_READDIR(vp, uiop, cred, eofflag, cookies, ncookies);
1658 if (error)
1659 MARK_INT_FAIL(CODA_READDIR_STATS);
1660 else
1661 MARK_INT_SAT(CODA_READDIR_STATS);
1662
1663 /* Do an "internal close" if necessary. */
1664 if (opened_internally) {
1665 MARK_INT_GEN(CODA_CLOSE_STATS);
1666 (void)VOP_CLOSE(vp, FREAD, cred, l);
1667 }
1668 }
1669
1670 return(error);
1671 }
1672
1673 /*
1674 * Convert from file system blocks to device blocks
1675 */
1676 int
1677 coda_bmap(void *v)
1678 {
1679 /* XXX on the global proc */
1680 /* true args */
1681 struct vop_bmap_args *ap = v;
1682 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */
1683 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */
1684 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */
1685 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */
1686 struct lwp *l __attribute__((unused)) = curlwp;
1687 /* upcall decl */
1688 /* locals */
1689
1690 *vpp = (struct vnode *)0;
1691 myprintf(("coda_bmap called!\n"));
1692 return(EINVAL);
1693 }
1694
1695 /*
1696 * I don't think the following two things are used anywhere, so I've
1697 * commented them out
1698 *
1699 * struct buf *async_bufhead;
1700 * int async_daemon_count;
1701 */
1702 int
1703 coda_strategy(void *v)
1704 {
1705 /* true args */
1706 struct vop_strategy_args *ap = v;
1707 struct buf *bp __attribute__((unused)) = ap->a_bp;
1708 struct lwp *l __attribute__((unused)) = curlwp;
1709 /* upcall decl */
1710 /* locals */
1711
1712 myprintf(("coda_strategy called! "));
1713 return(EINVAL);
1714 }
1715
1716 int
1717 coda_reclaim(void *v)
1718 {
1719 /* true args */
1720 struct vop_reclaim_args *ap = v;
1721 struct vnode *vp = ap->a_vp;
1722 struct cnode *cp = VTOC(vp);
1723 /* upcall decl */
1724 /* locals */
1725
1726 /*
1727 * Forced unmount/flush will let vnodes with non zero use be destroyed!
1728 */
1729 ENTRY;
1730
1731 if (IS_UNMOUNTING(cp)) {
1732 #ifdef DEBUG
1733 if (VTOC(vp)->c_ovp) {
1734 if (IS_UNMOUNTING(cp))
1735 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp);
1736 }
1737 #endif
1738 } else {
1739 #ifdef OLD_DIAGNOSTIC
1740 if (vp->v_usecount != 0)
1741 print("coda_reclaim: pushing active %p\n", vp);
1742 if (VTOC(vp)->c_ovp) {
1743 panic("coda_reclaim: c_ovp not void");
1744 }
1745 #endif
1746 }
1747 cache_purge(vp);
1748 coda_free(VTOC(vp));
1749 SET_VTOC(vp) = NULL;
1750 return (0);
1751 }
1752
1753 int
1754 coda_lock(void *v)
1755 {
1756 /* true args */
1757 struct vop_lock_args *ap = v;
1758 struct vnode *vp = ap->a_vp;
1759 struct cnode *cp = VTOC(vp);
1760 /* upcall decl */
1761 /* locals */
1762
1763 ENTRY;
1764
1765 if (coda_lockdebug) {
1766 myprintf(("Attempting lock on %s\n",
1767 coda_f2s(&cp->c_fid)));
1768 }
1769
1770 return (lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock));
1771 }
1772
1773 int
1774 coda_unlock(void *v)
1775 {
1776 /* true args */
1777 struct vop_unlock_args *ap = v;
1778 struct vnode *vp = ap->a_vp;
1779 struct cnode *cp = VTOC(vp);
1780 /* upcall decl */
1781 /* locals */
1782
1783 ENTRY;
1784 if (coda_lockdebug) {
1785 myprintf(("Attempting unlock on %s\n",
1786 coda_f2s(&cp->c_fid)));
1787 }
1788
1789 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock));
1790 }
1791
1792 int
1793 coda_islocked(void *v)
1794 {
1795 /* true args */
1796 struct vop_islocked_args *ap = v;
1797 ENTRY;
1798
1799 return (lockstatus(&ap->a_vp->v_lock));
1800 }
1801
1802 /* How one looks up a vnode given a device/inode pair: */
1803 int
1804 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp)
1805 {
1806 /* This is like VFS_VGET() or igetinode()! */
1807 int error;
1808 struct mount *mp;
1809
1810 if (!(mp = devtomp(dev))) {
1811 myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev));
1812 return(ENXIO);
1813 }
1814
1815 /* XXX - ensure that nonzero-return means failure */
1816 error = VFS_VGET(mp, ino, vpp);
1817 if (error) {
1818 myprintf(("coda_grab_vnode: iget/vget(%d, %llu) returns %p, err %d\n",
1819 dev, (unsigned long long)ino, *vpp, error));
1820 return(ENOENT);
1821 }
1822 return(0);
1823 }
1824
1825 void
1826 print_vattr(struct vattr *attr)
1827 {
1828 const char *typestr;
1829
1830 switch (attr->va_type) {
1831 case VNON:
1832 typestr = "VNON";
1833 break;
1834 case VREG:
1835 typestr = "VREG";
1836 break;
1837 case VDIR:
1838 typestr = "VDIR";
1839 break;
1840 case VBLK:
1841 typestr = "VBLK";
1842 break;
1843 case VCHR:
1844 typestr = "VCHR";
1845 break;
1846 case VLNK:
1847 typestr = "VLNK";
1848 break;
1849 case VSOCK:
1850 typestr = "VSCK";
1851 break;
1852 case VFIFO:
1853 typestr = "VFFO";
1854 break;
1855 case VBAD:
1856 typestr = "VBAD";
1857 break;
1858 default:
1859 typestr = "????";
1860 break;
1861 }
1862
1863
1864 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n",
1865 typestr, (int)attr->va_mode, (int)attr->va_uid,
1866 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev));
1867
1868 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n",
1869 (int)attr->va_fileid, (int)attr->va_nlink,
1870 (int)attr->va_size,
1871 (int)attr->va_blocksize,(int)attr->va_bytes));
1872 myprintf((" gen %ld flags %ld vaflags %d\n",
1873 attr->va_gen, attr->va_flags, attr->va_vaflags));
1874 myprintf((" atime sec %d nsec %d\n",
1875 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec));
1876 myprintf((" mtime sec %d nsec %d\n",
1877 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec));
1878 myprintf((" ctime sec %d nsec %d\n",
1879 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec));
1880 }
1881
1882 /* How to print a ucred */
1883 void
1884 print_cred(kauth_cred_t cred)
1885 {
1886
1887 uint16_t ngroups;
1888 int i;
1889
1890 myprintf(("ref %d\tuid %d\n", kauth_cred_getrefcnt(cred),
1891 kauth_cred_geteuid(cred)));
1892
1893 ngroups = kauth_cred_ngroups(cred);
1894 for (i=0; i < ngroups; i++)
1895 myprintf(("\tgroup %d: (%d)\n", i, kauth_cred_group(cred, i)));
1896 myprintf(("\n"));
1897
1898 }
1899
1900 /*
1901 * Return a vnode for the given fid.
1902 * If no cnode exists for this fid create one and put it
1903 * in a table hashed by coda_f2i(). If the cnode for
1904 * this fid is already in the table return it (ref count is
1905 * incremented by coda_find. The cnode will be flushed from the
1906 * table when coda_inactive calls coda_unsave.
1907 */
1908 struct cnode *
1909 make_coda_node(CodaFid *fid, struct mount *vfsp, short type)
1910 {
1911 struct cnode *cp;
1912 int err;
1913
1914 if ((cp = coda_find(fid)) == NULL) {
1915 struct vnode *vp;
1916
1917 cp = coda_alloc();
1918 cp->c_fid = *fid;
1919
1920 err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp);
1921 if (err) {
1922 panic("coda: getnewvnode returned error %d", err);
1923 }
1924 vp->v_data = cp;
1925 vp->v_type = type;
1926 cp->c_vnode = vp;
1927 coda_save(cp);
1928
1929 } else {
1930 vref(CTOV(cp));
1931 }
1932
1933 return cp;
1934 }
1935
1936 int
1937 coda_getpages(void *v)
1938 {
1939 struct vop_getpages_args /* {
1940 struct vnode *a_vp;
1941 voff_t a_offset;
1942 struct vm_page **a_m;
1943 int *a_count;
1944 int a_centeridx;
1945 vm_prot_t a_access_type;
1946 int a_advice;
1947 int a_flags;
1948 } */ *ap = v;
1949 struct vnode *vp = ap->a_vp;
1950 struct cnode *cp = VTOC(vp);
1951 struct lwp *l = curlwp;
1952 kauth_cred_t cred = l->l_cred;
1953 int error;
1954
1955 /* Check for control object. */
1956 if (IS_CTL_VP(vp)) {
1957 return(EINVAL);
1958 }
1959
1960 error = VOP_OPEN(vp, FREAD, cred, l);
1961 if (error) {
1962 return error;
1963 }
1964 ap->a_vp = cp->c_ovp;
1965 error = VOCALL(ap->a_vp->v_op, VOFFSET(vop_getpages), ap);
1966 (void) VOP_CLOSE(vp, FREAD, cred, l);
1967 return error;
1968 }
1969
1970 int
1971 coda_putpages(void *v)
1972 {
1973 struct vop_putpages_args /* {
1974 struct vnode *a_vp;
1975 voff_t a_offlo;
1976 voff_t a_offhi;
1977 int a_flags;
1978 } */ *ap = v;
1979 struct vnode *vp = ap->a_vp;
1980
1981 simple_unlock(&vp->v_interlock);
1982
1983 /* Check for control object. */
1984 if (IS_CTL_VP(vp)) {
1985 return(EINVAL);
1986 }
1987
1988 /*
1989 * XXX
1990 * we'd like to do something useful here for msync(),
1991 * but that turns out to be hard.
1992 */
1993
1994 return 0;
1995 }
1996