FreeBSD/Linux Kernel Cross Reference
sys/coda/coda_vnops.c
1 /*
2 *
3 * Coda: an Experimental Distributed File System
4 * Release 3.1
5 *
6 * Copyright (c) 1987-1998 Carnegie Mellon University
7 * All Rights Reserved
8 *
9 * Permission to use, copy, modify and distribute this software and its
10 * documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation, and
14 * that credit is given to Carnegie Mellon University in all documents
15 * and publicity pertaining to direct or indirect use of this code or its
16 * derivatives.
17 *
18 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
19 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
20 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
21 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
22 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
23 * ANY DERIVATIVE WORK.
24 *
25 * Carnegie Mellon encourages users of this software to return any
26 * improvements or extensions that they make, and to grant Carnegie
27 * Mellon the rights to redistribute these changes without encumbrance.
28 *
29 * @(#) src/sys/coda/coda_vnops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
30 * $FreeBSD: releng/5.1/sys/coda/coda_vnops.c 111931 2003-03-05 22:30:02Z tjr $
31 *
32 */
33
34 /*
35 * Mach Operating System
36 * Copyright (c) 1990 Carnegie-Mellon University
37 * Copyright (c) 1989 Carnegie-Mellon University
38 * All rights reserved. The CMU software License Agreement specifies
39 * the terms and conditions for use and redistribution.
40 */
41
42 /*
43 * This code was written for the Coda filesystem at Carnegie Mellon
44 * University. Contributers include David Steere, James Kistler, and
45 * M. Satyanarayanan.
46 */
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/acct.h>
51 #include <sys/errno.h>
52 #include <sys/fcntl.h>
53 #include <sys/kernel.h>
54 #include <sys/lock.h>
55 #include <sys/malloc.h>
56 #include <sys/file.h> /* Must come after sys/malloc.h */
57 #include <sys/mount.h>
58 #include <sys/mutex.h>
59 #include <sys/namei.h>
60 #include <sys/proc.h>
61 #include <sys/uio.h>
62 #include <sys/unistd.h>
63
64 #include <vm/vm.h>
65 #include <vm/vm_object.h>
66 #include <vm/vm_extern.h>
67
68 #include <coda/coda.h>
69 #include <coda/cnode.h>
70 #include <coda/coda_vnops.h>
71 #include <coda/coda_venus.h>
72 #include <coda/coda_opstats.h>
73 #include <coda/coda_subr.h>
74 #include <coda/coda_namecache.h>
75 #include <coda/coda_pioctl.h>
76
77 /*
78 * These flags select various performance enhancements.
79 */
80 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */
81 int coda_symlink_cache = 1; /* Set to cache symbolic link information */
82 int coda_access_cache = 1; /* Set to handle some access checks directly */
83
84 /* structure to keep track of vfs calls */
85
86 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE];
87
88 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++)
89 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++)
90 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++)
91 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++)
92
93 /* What we are delaying for in printf */
94 int coda_printf_delay = 0; /* in microseconds */
95 int coda_vnop_print_entry = 0;
96 static int coda_lockdebug = 0;
97
98 /* Definition of the vfs operation vector */
99 static int (**coda_vnodeop_p)(void *);
100
101 /*
102 * Some NetBSD details:
103 *
104 * coda_start is called at the end of the mount syscall.
105 * coda_init is called at boot time.
106 */
107
108 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__func__))
109
110 /* Definition of the vnode operation vector */
111
112 struct vnodeopv_entry_desc coda_vnodeop_entries[] = {
113 { &vop_default_desc, coda_vop_error },
114 { &vop_lookup_desc, coda_lookup }, /* lookup */
115 { &vop_create_desc, coda_create }, /* create */
116 { &vop_mknod_desc, coda_vop_error }, /* mknod */
117 { &vop_open_desc, coda_open }, /* open */
118 { &vop_close_desc, coda_close }, /* close */
119 { &vop_access_desc, coda_access }, /* access */
120 { &vop_getattr_desc, coda_getattr }, /* getattr */
121 { &vop_setattr_desc, coda_setattr }, /* setattr */
122 { &vop_read_desc, coda_read }, /* read */
123 { &vop_write_desc, coda_write }, /* write */
124 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */
125 { &vop_fsync_desc, coda_fsync }, /* fsync */
126 { &vop_remove_desc, coda_remove }, /* remove */
127 { &vop_link_desc, coda_link }, /* link */
128 { &vop_rename_desc, coda_rename }, /* rename */
129 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */
130 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */
131 { &vop_symlink_desc, coda_symlink }, /* symlink */
132 { &vop_readdir_desc, coda_readdir }, /* readdir */
133 { &vop_readlink_desc, coda_readlink }, /* readlink */
134 { &vop_inactive_desc, coda_inactive }, /* inactive */
135 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */
136 { &vop_lock_desc, coda_lock }, /* lock */
137 { &vop_unlock_desc, coda_unlock }, /* unlock */
138 { &vop_bmap_desc, coda_bmap }, /* bmap */
139 { &vop_strategy_desc, coda_strategy }, /* strategy */
140 { &vop_print_desc, coda_vop_error }, /* print */
141 { &vop_islocked_desc, coda_islocked }, /* islocked */
142 { &vop_pathconf_desc, coda_pathconf }, /* pathconf */
143 { &vop_advlock_desc, coda_vop_nop }, /* advlock */
144 { &vop_lease_desc, coda_vop_nop }, /* lease */
145 { &vop_poll_desc, (vop_t *) vop_stdpoll },
146 { &vop_getpages_desc, (vop_t*)vop_stdgetpages }, /* pager intf.*/
147 { &vop_putpages_desc, (vop_t*)vop_stdputpages }, /* pager intf.*/
148 { &vop_createvobject_desc, (vop_t*)vop_stdcreatevobject },
149 { &vop_destroyvobject_desc, (vop_t*)vop_stddestroyvobject },
150 { &vop_getvobject_desc, (vop_t*)vop_stdgetvobject },
151
152 #if 0
153
154 we need to define these someday
155 #define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
156 #define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
157 #define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
158 #define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee)
159 #define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb)
160
161 missing
162 { &vop_reallocblks_desc, (vop_t *) ufs_missingop },
163 { &vop_cachedlookup_desc, (vop_t *) ufs_lookup },
164 { &vop_whiteout_desc, (vop_t *) ufs_whiteout },
165 #endif
166
167 { &vop_createvobject_desc, (vop_t *) vop_stdcreatevobject },
168 { &vop_destroyvobject_desc, (vop_t *) vop_stddestroyvobject },
169 { &vop_getvobject_desc, (vop_t *) vop_stdgetvobject },
170 { &vop_getwritemount_desc, (vop_t *) vop_stdgetwritemount },
171 { (struct vnodeop_desc*)NULL, (int(*)(void *))NULL }
172 };
173
174 static struct vnodeopv_desc coda_vnodeop_opv_desc =
175 { &coda_vnodeop_p, coda_vnodeop_entries };
176
177 VNODEOP_SET(coda_vnodeop_opv_desc);
178
179 /* A generic panic: we were called with something we didn't define yet */
180 int
181 coda_vop_error(void *anon) {
182 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
183
184 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n",
185 (*desc)->vdesc_name));
186 /*
187 panic("coda_vop_error");
188 */
189 return EIO;
190 }
191
192 /* A generic do-nothing. For lease_check, advlock */
193 int
194 coda_vop_nop(void *anon) {
195 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
196
197 if (codadebug) {
198 myprintf(("Vnode operation %s called, but unsupported\n",
199 (*desc)->vdesc_name));
200 }
201 return (0);
202 }
203
204 int
205 coda_vnodeopstats_init(void)
206 {
207 register int i;
208
209 for(i=0;i<CODA_VNODEOPS_SIZE;i++) {
210 coda_vnodeopstats[i].opcode = i;
211 coda_vnodeopstats[i].entries = 0;
212 coda_vnodeopstats[i].sat_intrn = 0;
213 coda_vnodeopstats[i].unsat_intrn = 0;
214 coda_vnodeopstats[i].gen_intrn = 0;
215 }
216 return 0;
217 }
218
219 /*
220 * coda_open calls Venus to return the device, inode pair of the cache
221 * file holding the data. Using iget, coda_open finds the vnode of the
222 * cache file, and then opens it.
223 */
224 int
225 coda_open(v)
226 void *v;
227 {
228 /*
229 * NetBSD can pass the O_EXCL flag in mode, even though the check
230 * has already happened. Venus defensively assumes that if open
231 * is passed the EXCL, it must be a bug. We strip the flag here.
232 */
233 /* true args */
234 struct vop_open_args *ap = v;
235 register struct vnode **vpp = &(ap->a_vp);
236 struct cnode *cp = VTOC(*vpp);
237 int flag = ap->a_mode & (~O_EXCL);
238 struct ucred *cred = ap->a_cred;
239 struct thread *td = ap->a_td;
240 /* locals */
241 int error;
242 struct vnode *vp;
243 dev_t dev;
244 ino_t inode;
245
246 MARK_ENTRY(CODA_OPEN_STATS);
247
248 /* Check for open of control file. */
249 if (IS_CTL_VP(*vpp)) {
250 /* XXX */
251 /* if (WRITEABLE(flag)) */
252 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) {
253 MARK_INT_FAIL(CODA_OPEN_STATS);
254 return(EACCES);
255 }
256 MARK_INT_SAT(CODA_OPEN_STATS);
257 return(0);
258 }
259
260 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, td->td_proc, &dev, &inode);
261 if (error)
262 return (error);
263 if (!error) {
264 CODADEBUG( CODA_OPEN,myprintf(("open: dev %#lx inode %lu result %d\n",
265 (u_long)dev2udev(dev), (u_long)inode,
266 error)); )
267 }
268
269 /* Translate the <device, inode> pair for the cache file into
270 an inode pointer. */
271 error = coda_grab_vnode(dev, inode, &vp);
272 if (error)
273 return (error);
274
275 /* We get the vnode back locked. Needs unlocked */
276 VOP_UNLOCK(vp, 0, td);
277 /* Keep a reference until the close comes in. */
278 vref(*vpp);
279
280 /* Save the vnode pointer for the cache file. */
281 if (cp->c_ovp == NULL) {
282 cp->c_ovp = vp;
283 } else {
284 if (cp->c_ovp != vp)
285 panic("coda_open: cp->c_ovp != ITOV(ip)");
286 }
287 cp->c_ocount++;
288
289 /* Flush the attribute cached if writing the file. */
290 if (flag & FWRITE) {
291 cp->c_owrite++;
292 cp->c_flags &= ~C_VATTR;
293 }
294
295 /* Save the <device, inode> pair for the cache file to speed
296 up subsequent page_read's. */
297 cp->c_device = dev;
298 cp->c_inode = inode;
299
300 /* Open the cache file. */
301 error = VOP_OPEN(vp, flag, cred, td);
302 if (error) {
303 printf("coda_open: VOP_OPEN on container failed %d\n", error);
304 return (error);
305 }
306 /* grab (above) does this when it calls newvnode unless it's in the cache*/
307 if (vp->v_type == VREG) {
308 error = vfs_object_create(vp, td, cred);
309 if (error != 0) {
310 printf("coda_open: vfs_object_create() returns %d\n", error);
311 vput(vp);
312 }
313 }
314
315 return(error);
316 }
317
318 /*
319 * Close the cache file used for I/O and notify Venus.
320 */
321 int
322 coda_close(v)
323 void *v;
324 {
325 /* true args */
326 struct vop_close_args *ap = v;
327 struct vnode *vp = ap->a_vp;
328 struct cnode *cp = VTOC(vp);
329 int flag = ap->a_fflag;
330 struct ucred *cred = ap->a_cred;
331 struct thread *td = ap->a_td;
332 /* locals */
333 int error;
334
335 MARK_ENTRY(CODA_CLOSE_STATS);
336
337 /* Check for close of control file. */
338 if (IS_CTL_VP(vp)) {
339 MARK_INT_SAT(CODA_CLOSE_STATS);
340 return(0);
341 }
342
343 if (IS_UNMOUNTING(cp)) {
344 if (cp->c_ovp) {
345 #ifdef CODA_VERBOSE
346 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n",
347 vrefcnt(vp), cp->c_ovp, vp, cp);
348 #endif
349 #ifdef hmm
350 vgone(cp->c_ovp);
351 #else
352 VOP_CLOSE(cp->c_ovp, flag, cred, td); /* Do errors matter here? */
353 vrele(cp->c_ovp);
354 #endif
355 } else {
356 #ifdef CODA_VERBOSE
357 printf("coda_close: NO container vp %p/cp %p\n", vp, cp);
358 #endif
359 }
360 return ENODEV;
361 } else {
362 VOP_CLOSE(cp->c_ovp, flag, cred, td); /* Do errors matter here? */
363 vrele(cp->c_ovp);
364 }
365
366 if (--cp->c_ocount == 0)
367 cp->c_ovp = NULL;
368
369 if (flag & FWRITE) /* file was opened for write */
370 --cp->c_owrite;
371
372 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, td->td_proc);
373 vrele(CTOV(cp));
374
375 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); )
376 return(error);
377 }
378
379 int
380 coda_read(v)
381 void *v;
382 {
383 struct vop_read_args *ap = v;
384
385 ENTRY;
386 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ,
387 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_td));
388 }
389
390 int
391 coda_write(v)
392 void *v;
393 {
394 struct vop_write_args *ap = v;
395
396 ENTRY;
397 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE,
398 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_td));
399 }
400
401 int
402 coda_rdwr(vp, uiop, rw, ioflag, cred, td)
403 struct vnode *vp;
404 struct uio *uiop;
405 enum uio_rw rw;
406 int ioflag;
407 struct ucred *cred;
408 struct thread *td;
409 {
410 /* upcall decl */
411 /* NOTE: container file operation!!! */
412 /* locals */
413 struct cnode *cp = VTOC(vp);
414 struct vnode *cfvp = cp->c_ovp;
415 struct proc *p = td->td_proc;
416 struct thread *ltd = td;
417 int igot_internally = 0;
418 int opened_internally = 0;
419 int error = 0;
420 int iscore = 0;
421
422 MARK_ENTRY(CODA_RDWR_STATS);
423
424 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %d, %lld, %d)\n", rw,
425 (void *)uiop->uio_iov->iov_base, uiop->uio_resid,
426 (long long)uiop->uio_offset, uiop->uio_segflg)); )
427
428 /* Check for rdwr of control object. */
429 if (IS_CTL_VP(vp)) {
430 MARK_INT_FAIL(CODA_RDWR_STATS);
431 return(EINVAL);
432 }
433
434 /*
435 * If file is not already open this must be a page
436 * {read,write} request. Iget the cache file's inode
437 * pointer if we still have its <device, inode> pair.
438 * Otherwise, we must do an internal open to derive the
439 * pair.
440 */
441 if (cfvp == NULL) {
442 /*
443 * If we're dumping core, do the internal open. Otherwise
444 * venus won't have the correct size of the core when
445 * it's completely written.
446 */
447 if (p) {
448 PROC_LOCK(p);
449 iscore = (p->p_acflag & ACORE);
450 PROC_UNLOCK(p);
451 }
452 else
453 ltd = curthread;
454
455 if (cp->c_inode != 0 && !iscore) {
456 igot_internally = 1;
457 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp);
458 if (error) {
459 MARK_INT_FAIL(CODA_RDWR_STATS);
460 return(error);
461 }
462 /*
463 * We get the vnode back locked by curthread in both Mach and
464 * NetBSD. Needs unlocked
465 */
466 VOP_UNLOCK(cfvp, 0, ltd);
467 }
468 else {
469 opened_internally = 1;
470 MARK_INT_GEN(CODA_OPEN_STATS);
471 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE),
472 cred, td);
473 printf("coda_rdwr: Internally Opening %p\n", vp);
474 if (error) {
475 printf("coda_rdwr: VOP_OPEN on container failed %d\n", error);
476 return (error);
477 }
478 if (vp->v_type == VREG) {
479 error = vfs_object_create(vp, td, cred);
480 if (error != 0) {
481 printf("coda_rdwr: vfs_object_create() returns %d\n", error);
482 vput(vp);
483 }
484 }
485 if (error) {
486 MARK_INT_FAIL(CODA_RDWR_STATS);
487 return(error);
488 }
489 cfvp = cp->c_ovp;
490 }
491 }
492
493 /* Have UFS handle the call. */
494 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n",
495 cp->c_fid.Volume, cp->c_fid.Vnode,
496 cp->c_fid.Unique, vrefcnt(CTOV(cp)))); )
497
498 if (rw == UIO_READ) {
499 error = VOP_READ(cfvp, uiop, ioflag, cred);
500 } else {
501 error = VOP_WRITE(cfvp, uiop, ioflag, cred);
502 /* ufs_write updates the vnode_pager_setsize for the vnode/object */
503
504 { struct vattr attr;
505
506 if (VOP_GETATTR(cfvp, &attr, cred, td) == 0) {
507 vnode_pager_setsize(vp, attr.va_size);
508 }
509 }
510 }
511
512 if (error)
513 MARK_INT_FAIL(CODA_RDWR_STATS);
514 else
515 MARK_INT_SAT(CODA_RDWR_STATS);
516
517 /* Do an internal close if necessary. */
518 if (opened_internally) {
519 MARK_INT_GEN(CODA_CLOSE_STATS);
520 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, td);
521 }
522
523 /* Invalidate cached attributes if writing. */
524 if (rw == UIO_WRITE)
525 cp->c_flags &= ~C_VATTR;
526 return(error);
527 }
528
529
530
531 int
532 coda_ioctl(v)
533 void *v;
534 {
535 /* true args */
536 struct vop_ioctl_args *ap = v;
537 struct vnode *vp = ap->a_vp;
538 int com = ap->a_command;
539 caddr_t data = ap->a_data;
540 int flag = ap->a_fflag;
541 struct ucred *cred = ap->a_cred;
542 struct thread *td = ap->a_td;
543 /* locals */
544 int error;
545 struct vnode *tvp;
546 struct nameidata ndp;
547 struct PioctlData *iap = (struct PioctlData *)data;
548
549 MARK_ENTRY(CODA_IOCTL_STATS);
550
551 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));)
552
553 /* Don't check for operation on a dying object, for ctlvp it
554 shouldn't matter */
555
556 /* Must be control object to succeed. */
557 if (!IS_CTL_VP(vp)) {
558 MARK_INT_FAIL(CODA_IOCTL_STATS);
559 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));)
560 return (EOPNOTSUPP);
561 }
562 /* Look up the pathname. */
563
564 /* Should we use the name cache here? It would get it from
565 lookupname sooner or later anyway, right? */
566
567 NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, iap->path, td);
568 error = namei(&ndp);
569 tvp = ndp.ni_vp;
570
571 if (error) {
572 MARK_INT_FAIL(CODA_IOCTL_STATS);
573 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n",
574 error));)
575 return(error);
576 }
577
578 /*
579 * Make sure this is a coda style cnode, but it may be a
580 * different vfsp
581 */
582 if (tvp->v_op != coda_vnodeop_p) {
583 vrele(tvp);
584 NDFREE(&ndp, NDF_ONLY_PNBUF);
585 MARK_INT_FAIL(CODA_IOCTL_STATS);
586 CODADEBUG(CODA_IOCTL,
587 myprintf(("coda_ioctl error: %s not a coda object\n",
588 iap->path));)
589 return(EINVAL);
590 }
591
592 if (iap->vi.in_size > VC_MAXDATASIZE) {
593 NDFREE(&ndp, 0);
594 return(EINVAL);
595 }
596 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, td->td_proc);
597
598 if (error)
599 MARK_INT_FAIL(CODA_IOCTL_STATS);
600 else
601 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); )
602
603 vrele(tvp);
604 NDFREE(&ndp, NDF_ONLY_PNBUF);
605 return(error);
606 }
607
608 /*
609 * To reduce the cost of a user-level venus;we cache attributes in
610 * the kernel. Each cnode has storage allocated for an attribute. If
611 * c_vattr is valid, return a reference to it. Otherwise, get the
612 * attributes from venus and store them in the cnode. There is some
613 * question if this method is a security leak. But I think that in
614 * order to make this call, the user must have done a lookup and
615 * opened the file, and therefore should already have access.
616 */
617 int
618 coda_getattr(v)
619 void *v;
620 {
621 /* true args */
622 struct vop_getattr_args *ap = v;
623 struct vnode *vp = ap->a_vp;
624 struct cnode *cp = VTOC(vp);
625 struct vattr *vap = ap->a_vap;
626 struct ucred *cred = ap->a_cred;
627 struct thread *td = ap->a_td;
628 /* locals */
629 int error;
630
631 MARK_ENTRY(CODA_GETATTR_STATS);
632
633 if (IS_UNMOUNTING(cp))
634 return ENODEV;
635
636 /* Check for getattr of control object. */
637 if (IS_CTL_VP(vp)) {
638 MARK_INT_FAIL(CODA_GETATTR_STATS);
639 return(ENOENT);
640 }
641
642 /* Check to see if the attributes have already been cached */
643 if (VALID_VATTR(cp)) {
644 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n",
645 cp->c_fid.Volume,
646 cp->c_fid.Vnode,
647 cp->c_fid.Unique));});
648 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
649 print_vattr(&cp->c_vattr); );
650
651 *vap = cp->c_vattr;
652 MARK_INT_SAT(CODA_GETATTR_STATS);
653 return(0);
654 }
655
656 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, td->td_proc, vap);
657
658 if (!error) {
659 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n",
660 cp->c_fid.Volume,
661 cp->c_fid.Vnode,
662 cp->c_fid.Unique,
663 error)); )
664
665 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
666 print_vattr(vap); );
667
668 { int size = vap->va_size;
669 struct vnode *convp = cp->c_ovp;
670 if (convp != (struct vnode *)0) {
671 vnode_pager_setsize(convp, size);
672 }
673 }
674 /* If not open for write, store attributes in cnode */
675 if ((cp->c_owrite == 0) && (coda_attr_cache)) {
676 cp->c_vattr = *vap;
677 cp->c_flags |= C_VATTR;
678 }
679
680 }
681 return(error);
682 }
683
684 int
685 coda_setattr(v)
686 void *v;
687 {
688 /* true args */
689 struct vop_setattr_args *ap = v;
690 register struct vnode *vp = ap->a_vp;
691 struct cnode *cp = VTOC(vp);
692 register struct vattr *vap = ap->a_vap;
693 struct ucred *cred = ap->a_cred;
694 struct thread *td = ap->a_td;
695 /* locals */
696 int error;
697
698 MARK_ENTRY(CODA_SETATTR_STATS);
699
700 /* Check for setattr of control object. */
701 if (IS_CTL_VP(vp)) {
702 MARK_INT_FAIL(CODA_SETATTR_STATS);
703 return(ENOENT);
704 }
705
706 if (codadebug & CODADBGMSK(CODA_SETATTR)) {
707 print_vattr(vap);
708 }
709 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, td->td_proc);
710
711 if (!error)
712 cp->c_flags &= ~C_VATTR;
713
714 { int size = vap->va_size;
715 struct vnode *convp = cp->c_ovp;
716 if (size != VNOVAL && convp != (struct vnode *)0) {
717 vnode_pager_setsize(convp, size);
718 }
719 }
720 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); )
721 return(error);
722 }
723
724 int
725 coda_access(v)
726 void *v;
727 {
728 /* true args */
729 struct vop_access_args *ap = v;
730 struct vnode *vp = ap->a_vp;
731 struct cnode *cp = VTOC(vp);
732 int mode = ap->a_mode;
733 struct ucred *cred = ap->a_cred;
734 struct thread *td = ap->a_td;
735 /* locals */
736 int error;
737
738 MARK_ENTRY(CODA_ACCESS_STATS);
739
740 /* Check for access of control object. Only read access is
741 allowed on it. */
742 if (IS_CTL_VP(vp)) {
743 /* bogus hack - all will be marked as successes */
744 MARK_INT_SAT(CODA_ACCESS_STATS);
745 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC)))
746 ? 0 : EACCES);
747 }
748
749 /*
750 * if the file is a directory, and we are checking exec (eg lookup)
751 * access, and the file is in the namecache, then the user must have
752 * lookup access to it.
753 */
754 if (coda_access_cache) {
755 if ((vp->v_type == VDIR) && (mode & VEXEC)) {
756 if (coda_nc_lookup(cp, ".", 1, cred)) {
757 MARK_INT_SAT(CODA_ACCESS_STATS);
758 return(0); /* it was in the cache */
759 }
760 }
761 }
762
763 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, td->td_proc);
764
765 return(error);
766 }
767
768 int
769 coda_readlink(v)
770 void *v;
771 {
772 /* true args */
773 struct vop_readlink_args *ap = v;
774 struct vnode *vp = ap->a_vp;
775 struct cnode *cp = VTOC(vp);
776 struct uio *uiop = ap->a_uio;
777 struct ucred *cred = ap->a_cred;
778 struct thread *td = ap->a_uio->uio_td;
779 /* locals */
780 int error;
781 char *str;
782 int len;
783
784 MARK_ENTRY(CODA_READLINK_STATS);
785
786 /* Check for readlink of control object. */
787 if (IS_CTL_VP(vp)) {
788 MARK_INT_FAIL(CODA_READLINK_STATS);
789 return(ENOENT);
790 }
791
792 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */
793 uiop->uio_rw = UIO_READ;
794 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop);
795 if (error)
796 MARK_INT_FAIL(CODA_READLINK_STATS);
797 else
798 MARK_INT_SAT(CODA_READLINK_STATS);
799 return(error);
800 }
801
802 error = venus_readlink(vtomi(vp), &cp->c_fid, cred,
803 td != NULL ? td->td_proc : NULL, &str, &len);
804
805 if (!error) {
806 uiop->uio_rw = UIO_READ;
807 error = uiomove(str, len, uiop);
808
809 if (coda_symlink_cache) {
810 cp->c_symlink = str;
811 cp->c_symlen = len;
812 cp->c_flags |= C_SYMLINK;
813 } else
814 CODA_FREE(str, len);
815 }
816
817 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));)
818 return(error);
819 }
820
821 int
822 coda_fsync(v)
823 void *v;
824 {
825 /* true args */
826 struct vop_fsync_args *ap = v;
827 struct vnode *vp = ap->a_vp;
828 struct cnode *cp = VTOC(vp);
829 struct ucred *cred = ap->a_cred;
830 struct thread *td = ap->a_td;
831 /* locals */
832 struct vnode *convp = cp->c_ovp;
833 int error;
834
835 MARK_ENTRY(CODA_FSYNC_STATS);
836
837 /* Check for fsync on an unmounting object */
838 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync
839 * after an unmount has been initiated. This is a Bad Thing,
840 * which we have to avoid. Not a legitimate failure for stats.
841 */
842 if (IS_UNMOUNTING(cp)) {
843 return(ENODEV);
844 }
845
846 /* Check for fsync of control object. */
847 if (IS_CTL_VP(vp)) {
848 MARK_INT_SAT(CODA_FSYNC_STATS);
849 return(0);
850 }
851
852 if (convp)
853 VOP_FSYNC(convp, cred, MNT_WAIT, td);
854
855 /*
856 * We see fsyncs with usecount == 1 then usecount == 0.
857 * For now we ignore them.
858 */
859 /*
860 VI_LOCK(vp);
861 if (!vp->v_usecount) {
862 printf("coda_fsync on vnode %p with %d usecount. c_flags = %x (%x)\n",
863 vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING);
864 }
865 VI_UNLOCK(vp);
866 */
867
868 /*
869 * We can expect fsync on any vnode at all if venus is pruging it.
870 * Venus can't very well answer the fsync request, now can it?
871 * Hopefully, it won't have to, because hopefully, venus preserves
872 * the (possibly untrue) invariant that it never purges an open
873 * vnode. Hopefully.
874 */
875 if (cp->c_flags & C_PURGING) {
876 return(0);
877 }
878
879 /* needs research */
880 return 0;
881 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, td->td_proc);
882
883 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); );
884 return(error);
885 }
886
887 int
888 coda_inactive(v)
889 void *v;
890 {
891 /* XXX - at the moment, inactive doesn't look at cred, and doesn't
892 have a proc pointer. Oops. */
893 /* true args */
894 struct vop_inactive_args *ap = v;
895 struct vnode *vp = ap->a_vp;
896 struct cnode *cp = VTOC(vp);
897 struct ucred *cred __attribute__((unused)) = NULL;
898 struct thread *td __attribute__((unused)) = curthread;
899 /* upcall decl */
900 /* locals */
901
902 /* We don't need to send inactive to venus - DCS */
903 MARK_ENTRY(CODA_INACTIVE_STATS);
904
905 if (IS_CTL_VP(vp)) {
906 MARK_INT_SAT(CODA_INACTIVE_STATS);
907 return 0;
908 }
909
910 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n",
911 cp->c_fid.Volume, cp->c_fid.Vnode,
912 cp->c_fid.Unique, vp->v_mount));)
913
914 /* If an array has been allocated to hold the symlink, deallocate it */
915 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) {
916 if (cp->c_symlink == NULL)
917 panic("coda_inactive: null symlink pointer in cnode");
918
919 CODA_FREE(cp->c_symlink, cp->c_symlen);
920 cp->c_flags &= ~C_SYMLINK;
921 cp->c_symlen = 0;
922 }
923
924 /* Remove it from the table so it can't be found. */
925 coda_unsave(cp);
926 if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) {
927 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp));
928 panic("badness in coda_inactive\n");
929 }
930
931 if (IS_UNMOUNTING(cp)) {
932 #ifdef DEBUG
933 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vrefcnt(vp), vp, cp);
934 if (cp->c_ovp != NULL)
935 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n",
936 vrefcnt(vp), vp, cp);
937 #endif
938 lockmgr(&cp->c_lock, LK_RELEASE, &vp->v_interlock, td);
939 } else {
940 #ifdef OLD_DIAGNOSTIC
941 if (vrefcnt(CTOV(cp))) {
942 panic("coda_inactive: nonzero reference count");
943 }
944 if (cp->c_ovp != NULL) {
945 panic("coda_inactive: cp->ovp != NULL");
946 }
947 #endif
948 VOP_UNLOCK(vp, 0, td);
949 vgone(vp);
950 }
951
952 MARK_INT_SAT(CODA_INACTIVE_STATS);
953 return(0);
954 }
955
956 /*
957 * Remote filesystem operations having to do with directory manipulation.
958 */
959
960 /*
961 * It appears that in NetBSD, lookup is supposed to return the vnode locked
962 */
963 int
964 coda_lookup(v)
965 void *v;
966 {
967 /* true args */
968 struct vop_lookup_args *ap = v;
969 struct vnode *dvp = ap->a_dvp;
970 struct cnode *dcp = VTOC(dvp);
971 struct vnode **vpp = ap->a_vpp;
972 /*
973 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest
974 * of the string to xlate, and that we must try to get at least
975 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I
976 * could be wrong.
977 */
978 struct componentname *cnp = ap->a_cnp;
979 struct ucred *cred = cnp->cn_cred;
980 struct thread *td = cnp->cn_thread;
981 /* locals */
982 struct cnode *cp;
983 const char *nm = cnp->cn_nameptr;
984 int len = cnp->cn_namelen;
985 ViceFid VFid;
986 int vtype;
987 int error = 0;
988
989 MARK_ENTRY(CODA_LOOKUP_STATS);
990
991 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n",
992 nm, dcp->c_fid.Volume,
993 dcp->c_fid.Vnode, dcp->c_fid.Unique)););
994
995 /* Check for lookup of control object. */
996 if (IS_CTL_NAME(dvp, nm, len)) {
997 *vpp = coda_ctlvp;
998 vref(*vpp);
999 MARK_INT_SAT(CODA_LOOKUP_STATS);
1000 goto exit;
1001 }
1002
1003 if (len+1 > CODA_MAXNAMLEN) {
1004 MARK_INT_FAIL(CODA_LOOKUP_STATS);
1005 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n",
1006 dcp->c_fid.Volume, dcp->c_fid.Vnode,
1007 dcp->c_fid.Unique, nm)););
1008 *vpp = (struct vnode *)0;
1009 error = EINVAL;
1010 goto exit;
1011 }
1012 /* First try to look the file up in the cfs name cache */
1013 /* lock the parent vnode? */
1014 cp = coda_nc_lookup(dcp, nm, len, cred);
1015 if (cp) {
1016 *vpp = CTOV(cp);
1017 vref(*vpp);
1018 CODADEBUG(CODA_LOOKUP,
1019 myprintf(("lookup result %d vpp %p\n",error,*vpp));)
1020 } else {
1021
1022 /* The name wasn't cached, so we need to contact Venus */
1023 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, td->td_proc, &VFid, &vtype);
1024
1025 if (error) {
1026 MARK_INT_FAIL(CODA_LOOKUP_STATS);
1027 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n",
1028 dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));)
1029 *vpp = (struct vnode *)0;
1030 } else {
1031 MARK_INT_SAT(CODA_LOOKUP_STATS);
1032 CODADEBUG(CODA_LOOKUP,
1033 myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n",
1034 VFid.Volume, VFid.Vnode, VFid.Unique, vtype,
1035 error)); )
1036
1037 cp = make_coda_node(&VFid, dvp->v_mount, vtype);
1038 *vpp = CTOV(cp);
1039
1040 /* enter the new vnode in the Name Cache only if the top bit isn't set */
1041 /* And don't enter a new vnode for an invalid one! */
1042 if (!(vtype & CODA_NOCACHE))
1043 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1044 }
1045 }
1046
1047 exit:
1048 /*
1049 * If we are creating, and this was the last name to be looked up,
1050 * and the error was ENOENT, then there really shouldn't be an
1051 * error and we can make the leaf NULL and return success. Since
1052 * this is supposed to work under Mach as well as NetBSD, we're
1053 * leaving this fn wrapped. We also must tell lookup/namei that
1054 * we need to save the last component of the name. (Create will
1055 * have to free the name buffer later...lucky us...)
1056 */
1057 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME))
1058 && (cnp->cn_flags & ISLASTCN)
1059 && (error == ENOENT))
1060 {
1061 error = EJUSTRETURN;
1062 cnp->cn_flags |= SAVENAME;
1063 *ap->a_vpp = NULL;
1064 }
1065
1066 /*
1067 * If we are removing, and we are at the last element, and we
1068 * found it, then we need to keep the name around so that the
1069 * removal will go ahead as planned. Unfortunately, this will
1070 * probably also lock the to-be-removed vnode, which may or may
1071 * not be a good idea. I'll have to look at the bits of
1072 * coda_remove to make sure. We'll only save the name if we did in
1073 * fact find the name, otherwise coda_remove won't have a chance
1074 * to free the pathname.
1075 */
1076 if ((cnp->cn_nameiop == DELETE)
1077 && (cnp->cn_flags & ISLASTCN)
1078 && !error)
1079 {
1080 cnp->cn_flags |= SAVENAME;
1081 }
1082
1083 /*
1084 * If the lookup went well, we need to (potentially?) unlock the
1085 * parent, and lock the child. We are only responsible for
1086 * checking to see if the parent is supposed to be unlocked before
1087 * we return. We must always lock the child (provided there is
1088 * one, and (the parent isn't locked or it isn't the same as the
1089 * parent.) Simple, huh? We can never leave the parent locked unless
1090 * we are ISLASTCN
1091 */
1092 if (!error || (error == EJUSTRETURN)) {
1093 if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) {
1094 if ((error = VOP_UNLOCK(dvp, 0, td))) {
1095 return error;
1096 }
1097 /*
1098 * The parent is unlocked. As long as there is a child,
1099 * lock it without bothering to check anything else.
1100 */
1101 if (*ap->a_vpp) {
1102 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1103 printf("coda_lookup: ");
1104 panic("unlocked parent but couldn't lock child");
1105 }
1106 }
1107 } else {
1108 /* The parent is locked, and may be the same as the child */
1109 if (*ap->a_vpp && (*ap->a_vpp != dvp)) {
1110 /* Different, go ahead and lock it. */
1111 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1112 printf("coda_lookup: ");
1113 panic("unlocked parent but couldn't lock child");
1114 }
1115 }
1116 }
1117 } else {
1118 /* If the lookup failed, we need to ensure that the leaf is NULL */
1119 /* Don't change any locking? */
1120 *ap->a_vpp = NULL;
1121 }
1122 return(error);
1123 }
1124
1125 /*ARGSUSED*/
1126 int
1127 coda_create(v)
1128 void *v;
1129 {
1130 /* true args */
1131 struct vop_create_args *ap = v;
1132 struct vnode *dvp = ap->a_dvp;
1133 struct cnode *dcp = VTOC(dvp);
1134 struct vattr *va = ap->a_vap;
1135 int exclusive = 1;
1136 int mode = ap->a_vap->va_mode;
1137 struct vnode **vpp = ap->a_vpp;
1138 struct componentname *cnp = ap->a_cnp;
1139 struct ucred *cred = cnp->cn_cred;
1140 struct thread *td = cnp->cn_thread;
1141 /* locals */
1142 int error;
1143 struct cnode *cp;
1144 const char *nm = cnp->cn_nameptr;
1145 int len = cnp->cn_namelen;
1146 ViceFid VFid;
1147 struct vattr attr;
1148
1149 MARK_ENTRY(CODA_CREATE_STATS);
1150
1151 /* All creates are exclusive XXX */
1152 /* I'm assuming the 'mode' argument is the file mode bits XXX */
1153
1154 /* Check for create of control object. */
1155 if (IS_CTL_NAME(dvp, nm, len)) {
1156 *vpp = (struct vnode *)0;
1157 MARK_INT_FAIL(CODA_CREATE_STATS);
1158 return(EACCES);
1159 }
1160
1161 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, td->td_proc, &VFid, &attr);
1162
1163 if (!error) {
1164
1165 /* If this is an exclusive create, panic if the file already exists. */
1166 /* Venus should have detected the file and reported EEXIST. */
1167
1168 if ((exclusive == 1) &&
1169 (coda_find(&VFid) != NULL))
1170 panic("cnode existed for newly created file!");
1171
1172 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type);
1173 *vpp = CTOV(cp);
1174
1175 /* Update va to reflect the new attributes. */
1176 (*va) = attr;
1177
1178 /* Update the attribute cache and mark it as valid */
1179 if (coda_attr_cache) {
1180 VTOC(*vpp)->c_vattr = attr;
1181 VTOC(*vpp)->c_flags |= C_VATTR;
1182 }
1183
1184 /* Invalidate the parent's attr cache, the modification time has changed */
1185 VTOC(dvp)->c_flags &= ~C_VATTR;
1186
1187 /* enter the new vnode in the Name Cache */
1188 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1189
1190 CODADEBUG(CODA_CREATE,
1191 myprintf(("create: (%lx.%lx.%lx), result %d\n",
1192 VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
1193 } else {
1194 *vpp = (struct vnode *)0;
1195 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));)
1196 }
1197
1198 if (!error) {
1199 if (cnp->cn_flags & LOCKLEAF) {
1200 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1201 printf("coda_create: ");
1202 panic("unlocked parent but couldn't lock child");
1203 }
1204 }
1205 #ifdef OLD_DIAGNOSTIC
1206 else {
1207 printf("coda_create: LOCKLEAF not set!\n");
1208 }
1209 #endif
1210 }
1211 return(error);
1212 }
1213
1214 int
1215 coda_remove(v)
1216 void *v;
1217 {
1218 /* true args */
1219 struct vop_remove_args *ap = v;
1220 struct vnode *dvp = ap->a_dvp;
1221 struct cnode *cp = VTOC(dvp);
1222 struct componentname *cnp = ap->a_cnp;
1223 struct ucred *cred = cnp->cn_cred;
1224 struct thread *td = cnp->cn_thread;
1225 /* locals */
1226 int error;
1227 const char *nm = cnp->cn_nameptr;
1228 int len = cnp->cn_namelen;
1229 struct cnode *tp;
1230
1231 MARK_ENTRY(CODA_REMOVE_STATS);
1232
1233 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n",
1234 nm, cp->c_fid.Volume, cp->c_fid.Vnode,
1235 cp->c_fid.Unique)););
1236
1237 /* Remove the file's entry from the CODA Name Cache */
1238 /* We're being conservative here, it might be that this person
1239 * doesn't really have sufficient access to delete the file
1240 * but we feel zapping the entry won't really hurt anyone -- dcs
1241 */
1242 /* I'm gonna go out on a limb here. If a file and a hardlink to it
1243 * exist, and one is removed, the link count on the other will be
1244 * off by 1. We could either invalidate the attrs if cached, or
1245 * fix them. I'll try to fix them. DCS 11/8/94
1246 */
1247 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred);
1248 if (tp) {
1249 if (VALID_VATTR(tp)) { /* If attrs are cached */
1250 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */
1251 tp->c_vattr.va_nlink--;
1252 }
1253 }
1254
1255 coda_nc_zapfile(VTOC(dvp), nm, len);
1256 /* No need to flush it if it doesn't exist! */
1257 }
1258 /* Invalidate the parent's attr cache, the modification time has changed */
1259 VTOC(dvp)->c_flags &= ~C_VATTR;
1260
1261 /* Check for remove of control object. */
1262 if (IS_CTL_NAME(dvp, nm, len)) {
1263 MARK_INT_FAIL(CODA_REMOVE_STATS);
1264 return(ENOENT);
1265 }
1266
1267 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, td->td_proc);
1268
1269 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); )
1270
1271 return(error);
1272 }
1273
1274 int
1275 coda_link(v)
1276 void *v;
1277 {
1278 /* true args */
1279 struct vop_link_args *ap = v;
1280 struct vnode *vp = ap->a_vp;
1281 struct cnode *cp = VTOC(vp);
1282 struct vnode *tdvp = ap->a_tdvp;
1283 struct cnode *tdcp = VTOC(tdvp);
1284 struct componentname *cnp = ap->a_cnp;
1285 struct ucred *cred = cnp->cn_cred;
1286 struct thread *td = cnp->cn_thread;
1287 /* locals */
1288 int error;
1289 const char *nm = cnp->cn_nameptr;
1290 int len = cnp->cn_namelen;
1291
1292 MARK_ENTRY(CODA_LINK_STATS);
1293
1294 if (codadebug & CODADBGMSK(CODA_LINK)) {
1295
1296 myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n",
1297 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1298 myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n",
1299 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
1300
1301 }
1302 if (codadebug & CODADBGMSK(CODA_LINK)) {
1303 myprintf(("link: vp fid: (%lx.%lx.%lx)\n",
1304 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1305 myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n",
1306 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
1307
1308 }
1309
1310 /* Check for link to/from control object. */
1311 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) {
1312 MARK_INT_FAIL(CODA_LINK_STATS);
1313 return(EACCES);
1314 }
1315
1316 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, td->td_proc);
1317
1318 /* Invalidate the parent's attr cache, the modification time has changed */
1319 VTOC(tdvp)->c_flags &= ~C_VATTR;
1320 VTOC(vp)->c_flags &= ~C_VATTR;
1321
1322 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); )
1323
1324 return(error);
1325 }
1326
1327 int
1328 coda_rename(v)
1329 void *v;
1330 {
1331 /* true args */
1332 struct vop_rename_args *ap = v;
1333 struct vnode *odvp = ap->a_fdvp;
1334 struct cnode *odcp = VTOC(odvp);
1335 struct componentname *fcnp = ap->a_fcnp;
1336 struct vnode *ndvp = ap->a_tdvp;
1337 struct cnode *ndcp = VTOC(ndvp);
1338 struct componentname *tcnp = ap->a_tcnp;
1339 struct ucred *cred = fcnp->cn_cred;
1340 struct thread *td = fcnp->cn_thread;
1341 /* true args */
1342 int error;
1343 const char *fnm = fcnp->cn_nameptr;
1344 int flen = fcnp->cn_namelen;
1345 const char *tnm = tcnp->cn_nameptr;
1346 int tlen = tcnp->cn_namelen;
1347
1348 MARK_ENTRY(CODA_RENAME_STATS);
1349
1350 /* Hmmm. The vnodes are already looked up. Perhaps they are locked?
1351 This could be Bad. XXX */
1352 #ifdef OLD_DIAGNOSTIC
1353 if ((fcnp->cn_cred != tcnp->cn_cred)
1354 || (fcnp->cn_thread != tcnp->cn_thread))
1355 {
1356 panic("coda_rename: component names don't agree");
1357 }
1358 #endif
1359
1360 /* Check for rename involving control object. */
1361 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) {
1362 MARK_INT_FAIL(CODA_RENAME_STATS);
1363 return(EACCES);
1364 }
1365
1366 /* Problem with moving directories -- need to flush entry for .. */
1367 if (odvp != ndvp) {
1368 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred);
1369 if (ovcp) {
1370 struct vnode *ovp = CTOV(ovcp);
1371 if ((ovp) &&
1372 (ovp->v_type == VDIR)) /* If it's a directory */
1373 coda_nc_zapfile(VTOC(ovp),"..", 2);
1374 }
1375 }
1376
1377 /* Remove the entries for both source and target files */
1378 coda_nc_zapfile(VTOC(odvp), fnm, flen);
1379 coda_nc_zapfile(VTOC(ndvp), tnm, tlen);
1380
1381 /* Invalidate the parent's attr cache, the modification time has changed */
1382 VTOC(odvp)->c_flags &= ~C_VATTR;
1383 VTOC(ndvp)->c_flags &= ~C_VATTR;
1384
1385 if (flen+1 > CODA_MAXNAMLEN) {
1386 MARK_INT_FAIL(CODA_RENAME_STATS);
1387 error = EINVAL;
1388 goto exit;
1389 }
1390
1391 if (tlen+1 > CODA_MAXNAMLEN) {
1392 MARK_INT_FAIL(CODA_RENAME_STATS);
1393 error = EINVAL;
1394 goto exit;
1395 }
1396
1397 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, td->td_proc);
1398
1399 exit:
1400 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));)
1401 /* XXX - do we need to call cache pureg on the moved vnode? */
1402 cache_purge(ap->a_fvp);
1403
1404 /* It seems to be incumbent on us to drop locks on all four vnodes */
1405 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */
1406
1407 vrele(ap->a_fvp);
1408 vrele(odvp);
1409
1410 if (ap->a_tvp) {
1411 if (ap->a_tvp == ndvp) {
1412 vrele(ap->a_tvp);
1413 } else {
1414 vput(ap->a_tvp);
1415 }
1416 }
1417
1418 vput(ndvp);
1419 return(error);
1420 }
1421
1422 int
1423 coda_mkdir(v)
1424 void *v;
1425 {
1426 /* true args */
1427 struct vop_mkdir_args *ap = v;
1428 struct vnode *dvp = ap->a_dvp;
1429 struct cnode *dcp = VTOC(dvp);
1430 struct componentname *cnp = ap->a_cnp;
1431 register struct vattr *va = ap->a_vap;
1432 struct vnode **vpp = ap->a_vpp;
1433 struct ucred *cred = cnp->cn_cred;
1434 struct thread *td = cnp->cn_thread;
1435 /* locals */
1436 int error;
1437 const char *nm = cnp->cn_nameptr;
1438 int len = cnp->cn_namelen;
1439 struct cnode *cp;
1440 ViceFid VFid;
1441 struct vattr ova;
1442
1443 MARK_ENTRY(CODA_MKDIR_STATS);
1444
1445 /* Check for mkdir of target object. */
1446 if (IS_CTL_NAME(dvp, nm, len)) {
1447 *vpp = (struct vnode *)0;
1448 MARK_INT_FAIL(CODA_MKDIR_STATS);
1449 return(EACCES);
1450 }
1451
1452 if (len+1 > CODA_MAXNAMLEN) {
1453 *vpp = (struct vnode *)0;
1454 MARK_INT_FAIL(CODA_MKDIR_STATS);
1455 return(EACCES);
1456 }
1457
1458 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, td->td_proc, &VFid, &ova);
1459
1460 if (!error) {
1461 if (coda_find(&VFid) != NULL)
1462 panic("cnode existed for newly created directory!");
1463
1464
1465 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type);
1466 *vpp = CTOV(cp);
1467
1468 /* enter the new vnode in the Name Cache */
1469 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1470
1471 /* as a side effect, enter "." and ".." for the directory */
1472 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp));
1473 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp));
1474
1475 if (coda_attr_cache) {
1476 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */
1477 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */
1478 }
1479
1480 /* Invalidate the parent's attr cache, the modification time has changed */
1481 VTOC(dvp)->c_flags &= ~C_VATTR;
1482
1483 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n",
1484 VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
1485 } else {
1486 *vpp = (struct vnode *)0;
1487 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));)
1488 }
1489
1490 return(error);
1491 }
1492
1493 int
1494 coda_rmdir(v)
1495 void *v;
1496 {
1497 /* true args */
1498 struct vop_rmdir_args *ap = v;
1499 struct vnode *dvp = ap->a_dvp;
1500 struct cnode *dcp = VTOC(dvp);
1501 struct componentname *cnp = ap->a_cnp;
1502 struct ucred *cred = cnp->cn_cred;
1503 struct thread *td = cnp->cn_thread;
1504 /* true args */
1505 int error;
1506 const char *nm = cnp->cn_nameptr;
1507 int len = cnp->cn_namelen;
1508 struct cnode *cp;
1509
1510 MARK_ENTRY(CODA_RMDIR_STATS);
1511
1512 /* Check for rmdir of control object. */
1513 if (IS_CTL_NAME(dvp, nm, len)) {
1514 MARK_INT_FAIL(CODA_RMDIR_STATS);
1515 return(ENOENT);
1516 }
1517
1518 /* We're being conservative here, it might be that this person
1519 * doesn't really have sufficient access to delete the file
1520 * but we feel zapping the entry won't really hurt anyone -- dcs
1521 */
1522 /*
1523 * As a side effect of the rmdir, remove any entries for children of
1524 * the directory, especially "." and "..".
1525 */
1526 cp = coda_nc_lookup(dcp, nm, len, cred);
1527 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL);
1528
1529 /* Remove the file's entry from the CODA Name Cache */
1530 coda_nc_zapfile(dcp, nm, len);
1531
1532 /* Invalidate the parent's attr cache, the modification time has changed */
1533 dcp->c_flags &= ~C_VATTR;
1534
1535 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, td->td_proc);
1536
1537 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); )
1538
1539 return(error);
1540 }
1541
1542 int
1543 coda_symlink(v)
1544 void *v;
1545 {
1546 /* true args */
1547 struct vop_symlink_args *ap = v;
1548 struct vnode *tdvp = ap->a_dvp;
1549 struct cnode *tdcp = VTOC(tdvp);
1550 struct componentname *cnp = ap->a_cnp;
1551 struct vattr *tva = ap->a_vap;
1552 char *path = ap->a_target;
1553 struct ucred *cred = cnp->cn_cred;
1554 struct thread *td = cnp->cn_thread;
1555 struct vnode **vpp = ap->a_vpp;
1556 /* locals */
1557 int error;
1558 /*
1559 * XXX I'm assuming the following things about coda_symlink's
1560 * arguments:
1561 * t(foo) is the new name/parent/etc being created.
1562 * lname is the contents of the new symlink.
1563 */
1564 char *nm = cnp->cn_nameptr;
1565 int len = cnp->cn_namelen;
1566 int plen = strlen(path);
1567
1568 /*
1569 * Here's the strategy for the moment: perform the symlink, then
1570 * do a lookup to grab the resulting vnode. I know this requires
1571 * two communications with Venus for a new sybolic link, but
1572 * that's the way the ball bounces. I don't yet want to change
1573 * the way the Mach symlink works. When Mach support is
1574 * deprecated, we should change symlink so that the common case
1575 * returns the resultant vnode in a vpp argument.
1576 */
1577
1578 MARK_ENTRY(CODA_SYMLINK_STATS);
1579
1580 /* Check for symlink of control object. */
1581 if (IS_CTL_NAME(tdvp, nm, len)) {
1582 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1583 return(EACCES);
1584 }
1585
1586 if (plen+1 > CODA_MAXPATHLEN) {
1587 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1588 return(EINVAL);
1589 }
1590
1591 if (len+1 > CODA_MAXNAMLEN) {
1592 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1593 error = EINVAL;
1594 goto exit;
1595 }
1596
1597 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, td->td_proc);
1598
1599 /* Invalidate the parent's attr cache, the modification time has changed */
1600 tdcp->c_flags &= ~C_VATTR;
1601
1602 if (error == 0)
1603 error = VOP_LOOKUP(tdvp, vpp, cnp);
1604
1605 exit:
1606 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); )
1607 return(error);
1608 }
1609
1610 /*
1611 * Read directory entries.
1612 */
1613 int
1614 coda_readdir(v)
1615 void *v;
1616 {
1617 /* true args */
1618 struct vop_readdir_args *ap = v;
1619 struct vnode *vp = ap->a_vp;
1620 struct cnode *cp = VTOC(vp);
1621 register struct uio *uiop = ap->a_uio;
1622 struct ucred *cred = ap->a_cred;
1623 int *eofflag = ap->a_eofflag;
1624 u_long **cookies = ap->a_cookies;
1625 int *ncookies = ap->a_ncookies;
1626 struct thread *td = ap->a_uio->uio_td;
1627 /* upcall decl */
1628 /* locals */
1629 int error = 0;
1630
1631 MARK_ENTRY(CODA_READDIR_STATS);
1632
1633 CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %d, %lld, %d)\n",
1634 (void *)uiop->uio_iov->iov_base,
1635 uiop->uio_resid,
1636 (long long)uiop->uio_offset,
1637 uiop->uio_segflg)); )
1638
1639 /* Check for readdir of control object. */
1640 if (IS_CTL_VP(vp)) {
1641 MARK_INT_FAIL(CODA_READDIR_STATS);
1642 return(ENOENT);
1643 }
1644
1645 {
1646 /* If directory is not already open do an "internal open" on it. */
1647 int opened_internally = 0;
1648 if (cp->c_ovp == NULL) {
1649 opened_internally = 1;
1650 MARK_INT_GEN(CODA_OPEN_STATS);
1651 error = VOP_OPEN(vp, FREAD, cred, td);
1652 printf("coda_readdir: Internally Opening %p\n", vp);
1653 if (error) {
1654 printf("coda_readdir: VOP_OPEN on container failed %d\n", error);
1655 return (error);
1656 }
1657 if (vp->v_type == VREG) {
1658 error = vfs_object_create(vp, td, cred);
1659 if (error != 0) {
1660 printf("coda_readdir: vfs_object_create() returns %d\n", error);
1661 vput(vp);
1662 }
1663 }
1664 if (error) return(error);
1665 }
1666
1667 /* Have UFS handle the call. */
1668 CODADEBUG(CODA_READDIR, myprintf(("indirect readdir: fid = (%lx.%lx.%lx), refcnt = %d\n",cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique, vrefcnt(vp))); )
1669 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies,
1670 cookies);
1671
1672 if (error)
1673 MARK_INT_FAIL(CODA_READDIR_STATS);
1674 else
1675 MARK_INT_SAT(CODA_READDIR_STATS);
1676
1677 /* Do an "internal close" if necessary. */
1678 if (opened_internally) {
1679 MARK_INT_GEN(CODA_CLOSE_STATS);
1680 (void)VOP_CLOSE(vp, FREAD, cred, td);
1681 }
1682 }
1683
1684 return(error);
1685 }
1686
1687 /*
1688 * Convert from filesystem blocks to device blocks
1689 */
1690 int
1691 coda_bmap(v)
1692 void *v;
1693 {
1694 /* XXX on the global proc */
1695 /* true args */
1696 struct vop_bmap_args *ap = v;
1697 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */
1698 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */
1699 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */
1700 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */
1701 struct thread *td __attribute__((unused)) = curthread;
1702 /* upcall decl */
1703 /* locals */
1704
1705 int ret = 0;
1706 struct cnode *cp;
1707
1708 cp = VTOC(vp);
1709 if (cp->c_ovp) {
1710 return EINVAL;
1711 ret = VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb);
1712 #if 0
1713 printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %lld, ap->a_runp %p, ap->a_runb %p) = %d\n",
1714 cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret);
1715 #endif
1716 return ret;
1717 } else {
1718 #if 0
1719 printf("coda_bmap: no container\n");
1720 #endif
1721 return(EOPNOTSUPP);
1722 }
1723 }
1724
1725 /*
1726 * I don't think the following two things are used anywhere, so I've
1727 * commented them out
1728 *
1729 * struct buf *async_bufhead;
1730 * int async_daemon_count;
1731 */
1732 int
1733 coda_strategy(v)
1734 void *v;
1735 {
1736 /* true args */
1737 struct vop_strategy_args *ap = v;
1738 register struct buf *bp __attribute__((unused)) = ap->a_bp;
1739 struct thread *td __attribute__((unused)) = curthread;
1740 /* upcall decl */
1741 /* locals */
1742
1743 printf("coda_strategy: called ???\n");
1744 return(EOPNOTSUPP);
1745 }
1746
1747 int
1748 coda_reclaim(v)
1749 void *v;
1750 {
1751 /* true args */
1752 struct vop_reclaim_args *ap = v;
1753 struct vnode *vp = ap->a_vp;
1754 struct cnode *cp = VTOC(vp);
1755 /* upcall decl */
1756 /* locals */
1757
1758 /*
1759 * Forced unmount/flush will let vnodes with non zero use be destroyed!
1760 */
1761 ENTRY;
1762
1763 if (IS_UNMOUNTING(cp)) {
1764 #ifdef DEBUG
1765 if (VTOC(vp)->c_ovp) {
1766 if (IS_UNMOUNTING(cp))
1767 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp);
1768 }
1769 #endif
1770 } else {
1771 #ifdef OLD_DIAGNOSTIC
1772 if (vrefcnt(vp) != 0)
1773 print("coda_reclaim: pushing active %p\n", vp);
1774 if (VTOC(vp)->c_ovp) {
1775 panic("coda_reclaim: c_ovp not void");
1776 }
1777 #endif
1778 }
1779 cache_purge(vp);
1780 lockdestroy(&(VTOC(vp)->c_lock));
1781 coda_free(VTOC(vp));
1782 VTOC(vp) = NULL;
1783 return (0);
1784 }
1785
1786 int
1787 coda_lock(v)
1788 void *v;
1789 {
1790 /* true args */
1791 struct vop_lock_args *ap = v;
1792 struct vnode *vp = ap->a_vp;
1793 struct cnode *cp = VTOC(vp);
1794 struct thread *td = ap->a_td;
1795 /* upcall decl */
1796 /* locals */
1797
1798 ENTRY;
1799
1800 if (coda_lockdebug) {
1801 myprintf(("Attempting lock on %lx.%lx.%lx\n",
1802 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1803 }
1804
1805 #ifndef DEBUG_LOCKS
1806 return (lockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, td));
1807 #else
1808 return (debuglockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, td,
1809 "coda_lock", vp->filename, vp->line));
1810 #endif
1811 }
1812
1813 int
1814 coda_unlock(v)
1815 void *v;
1816 {
1817 /* true args */
1818 struct vop_unlock_args *ap = v;
1819 struct vnode *vp = ap->a_vp;
1820 struct cnode *cp = VTOC(vp);
1821 struct thread *td = ap->a_td;
1822 /* upcall decl */
1823 /* locals */
1824
1825 ENTRY;
1826 if (coda_lockdebug) {
1827 myprintf(("Attempting unlock on %lx.%lx.%lx\n",
1828 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1829 }
1830
1831 return (lockmgr(&cp->c_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock, td));
1832 }
1833
1834 int
1835 coda_islocked(v)
1836 void *v;
1837 {
1838 /* true args */
1839 struct vop_islocked_args *ap = v;
1840 struct cnode *cp = VTOC(ap->a_vp);
1841 ENTRY;
1842
1843 return (lockstatus(&cp->c_lock, ap->a_td));
1844 }
1845
1846 /* How one looks up a vnode given a device/inode pair: */
1847 int
1848 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp)
1849 {
1850 /* This is like VFS_VGET() or igetinode()! */
1851 int error;
1852 struct mount *mp;
1853
1854 if (!(mp = devtomp(dev))) {
1855 myprintf(("coda_grab_vnode: devtomp(%#lx) returns NULL\n",
1856 (u_long)dev2udev(dev)));
1857 return(ENXIO);
1858 }
1859
1860 /* XXX - ensure that nonzero-return means failure */
1861 error = VFS_VGET(mp,ino,LK_EXCLUSIVE,vpp);
1862 if (error) {
1863 myprintf(("coda_grab_vnode: iget/vget(%lx, %lu) returns %p, err %d\n",
1864 (u_long)dev2udev(dev), (u_long)ino, (void *)*vpp, error));
1865 return(ENOENT);
1866 }
1867 return(0);
1868 }
1869
1870 void
1871 print_vattr( attr )
1872 struct vattr *attr;
1873 {
1874 char *typestr;
1875
1876 switch (attr->va_type) {
1877 case VNON:
1878 typestr = "VNON";
1879 break;
1880 case VREG:
1881 typestr = "VREG";
1882 break;
1883 case VDIR:
1884 typestr = "VDIR";
1885 break;
1886 case VBLK:
1887 typestr = "VBLK";
1888 break;
1889 case VCHR:
1890 typestr = "VCHR";
1891 break;
1892 case VLNK:
1893 typestr = "VLNK";
1894 break;
1895 case VSOCK:
1896 typestr = "VSCK";
1897 break;
1898 case VFIFO:
1899 typestr = "VFFO";
1900 break;
1901 case VBAD:
1902 typestr = "VBAD";
1903 break;
1904 default:
1905 typestr = "????";
1906 break;
1907 }
1908
1909
1910 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n",
1911 typestr, (int)attr->va_mode, (int)attr->va_uid,
1912 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev));
1913
1914 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n",
1915 (int)attr->va_fileid, (int)attr->va_nlink,
1916 (int)attr->va_size,
1917 (int)attr->va_blocksize,(int)attr->va_bytes));
1918 myprintf((" gen %ld flags %ld vaflags %d\n",
1919 attr->va_gen, attr->va_flags, attr->va_vaflags));
1920 myprintf((" atime sec %d nsec %d\n",
1921 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec));
1922 myprintf((" mtime sec %d nsec %d\n",
1923 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec));
1924 myprintf((" ctime sec %d nsec %d\n",
1925 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec));
1926 }
1927
1928 /* How to print a ucred */
1929 void
1930 print_cred(cred)
1931 struct ucred *cred;
1932 {
1933
1934 int i;
1935
1936 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid));
1937
1938 for (i=0; i < cred->cr_ngroups; i++)
1939 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i]));
1940 myprintf(("\n"));
1941
1942 }
1943
1944 /*
1945 * Return a vnode for the given fid.
1946 * If no cnode exists for this fid create one and put it
1947 * in a table hashed by fid.Volume and fid.Vnode. If the cnode for
1948 * this fid is already in the table return it (ref count is
1949 * incremented by coda_find. The cnode will be flushed from the
1950 * table when coda_inactive calls coda_unsave.
1951 */
1952 struct cnode *
1953 make_coda_node(fid, vfsp, type)
1954 ViceFid *fid; struct mount *vfsp; short type;
1955 {
1956 struct cnode *cp;
1957 int err;
1958
1959 if ((cp = coda_find(fid)) == NULL) {
1960 struct vnode *vp;
1961
1962 cp = coda_alloc();
1963 lockinit(&cp->c_lock, PINOD, "cnode", 0, 0);
1964 cp->c_fid = *fid;
1965
1966 err = getnewvnode("coda", vfsp, coda_vnodeop_p, &vp);
1967 if (err) {
1968 panic("coda: getnewvnode returned error %d\n", err);
1969 }
1970 vp->v_data = cp;
1971 vp->v_type = type;
1972 cp->c_vnode = vp;
1973 coda_save(cp);
1974
1975 } else {
1976 vref(CTOV(cp));
1977 }
1978
1979 return cp;
1980 }
1981
1982 int
1983 coda_pathconf(v)
1984 void *v;
1985 {
1986 struct vop_pathconf_args *ap;
1987 int error;
1988 register_t *retval;
1989
1990 ap = v;
1991 retval = ap->a_retval;
1992 error = 0;
1993
1994 switch (ap->a_name) {
1995 case _PC_NAME_MAX:
1996 *retval = CODA_MAXNAMLEN;
1997 break;
1998 case _PC_PATH_MAX:
1999 *retval = CODA_MAXPATHLEN;
2000 break;
2001 default:
2002 error = vop_stdpathconf(ap);
2003 break;
2004 }
2005
2006 return (error);
2007 }
Cache object: 672e6a6c5ba04b7d0b89ebc3f44a4ae6
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