coda_vfsops.c revision 1.7 1 /* $NetBSD: coda_vfsops.c,v 1.7 1999/02/26 23:44:44 wrstuden Exp $ */
2
3 /*
4 *
5 * Coda: an Experimental Distributed File System
6 * Release 3.1
7 *
8 * Copyright (c) 1987-1998 Carnegie Mellon University
9 * All Rights Reserved
10 *
11 * Permission to use, copy, modify and distribute this software and its
12 * documentation is hereby granted, provided that both the copyright
13 * notice and this permission notice appear in all copies of the
14 * software, derivative works or modified versions, and any portions
15 * thereof, and that both notices appear in supporting documentation, and
16 * that credit is given to Carnegie Mellon University in all documents
17 * and publicity pertaining to direct or indirect use of this code or its
18 * derivatives.
19 *
20 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS,
21 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS
22 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON
23 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER
24 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF
25 * ANY DERIVATIVE WORK.
26 *
27 * Carnegie Mellon encourages users of this software to return any
28 * improvements or extensions that they make, and to grant Carnegie
29 * Mellon the rights to redistribute these changes without encumbrance.
30 *
31 * @(#) cfs/coda_vfsops.c,v 1.1.1.1 1998/08/29 21:26:45 rvb Exp $
32 */
33
34 /*
35 * Mach Operating System
36 * Copyright (c) 1989 Carnegie-Mellon University
37 * All rights reserved. The CMU software License Agreement specifies
38 * the terms and conditions for use and redistribution.
39 */
40
41 /*
42 * This code was written for the Coda file system at Carnegie Mellon
43 * University. Contributers include David Steere, James Kistler, and
44 * M. Satyanarayanan.
45 */
46
47 /*
48 * HISTORY
49 * $Log: coda_vfsops.c,v $
50 * Revision 1.7 1999/02/26 23:44:44 wrstuden
51 * Modify vfsops to seperate vfs_fhtovp() into two routines. vfs_fhtovp() now
52 * only handles the file handle to vnode conversion, and a new call,
53 * vfs_checkexp(), performs the export verification.
54 *
55 * Revision 1.6 1998/12/10 02:22:52 rvb
56 * Commit a couple of old fixes
57 *
58 * Revision 1.5 1998/09/25 15:01:13 rvb
59 * Conditionalize "stray" printouts under DIAGNOSTIC and DEBUG.
60 * Make files compile if DEBUG is on (from Alan Barrett). Finally,
61 * make coda an lkm.
62 *
63 * Revision 1.4 1998/09/15 02:03:00 rvb
64 * Final piece of rename cfs->coda
65 *
66 * Revision 1.3 1998/09/12 15:05:49 rvb
67 * Change cfs/CFS in symbols, strings and constants to coda/CODA
68 * to avoid fs conflicts.
69 *
70 * Revision 1.2 1998/09/08 17:12:47 rvb
71 * Pass2 complete
72 *
73 * Revision 1.1.1.1 1998/08/29 21:26:45 rvb
74 * Very Preliminary Coda
75 *
76 * Revision 1.11 1998/08/28 18:12:22 rvb
77 * Now it also works on FreeBSD -current. This code will be
78 * committed to the FreeBSD -current and NetBSD -current
79 * trees. It will then be tailored to the particular platform
80 * by flushing conditional code.
81 *
82 * Revision 1.10 1998/08/18 17:05:19 rvb
83 * Don't use __RCSID now
84 *
85 * Revision 1.9 1998/08/18 16:31:44 rvb
86 * Sync the code for NetBSD -current; test on 1.3 later
87 *
88 * Revision 1.8 98/02/24 22:22:48 rvb
89 * Fixes up mainly to flush iopen and friends
90 *
91 * Revision 1.7 98/01/23 11:53:45 rvb
92 * Bring RVB_CODA1_1 to HEAD
93 *
94 * Revision 1.6.2.6 98/01/23 11:21:07 rvb
95 * Sync with 2.2.5
96 *
97 * Revision 1.6.2.5 98/01/22 13:05:33 rvb
98 * Move make_coda_node ctlfid later so vfsp is known
99 *
100 * Revision 1.6.2.4 97/12/19 14:26:05 rvb
101 * session id
102 *
103 * Revision 1.6.2.3 97/12/16 12:40:11 rvb
104 * Sync with 1.3
105 *
106 * Revision 1.6.2.2 97/12/10 11:40:25 rvb
107 * No more ody
108 *
109 * Revision 1.6.2.1 97/12/06 17:41:24 rvb
110 * Sync with peters coda.h
111 *
112 * Revision 1.6 97/12/05 10:39:21 rvb
113 * Read CHANGES
114 *
115 * Revision 1.5.14.8 97/11/24 15:44:46 rvb
116 * Final cfs_venus.c w/o macros, but one locking bug
117 *
118 * Revision 1.5.14.7 97/11/21 13:22:03 rvb
119 * Catch a few coda_calls in coda_vfsops.c
120 *
121 * Revision 1.5.14.6 97/11/20 11:46:48 rvb
122 * Capture current cfs_venus
123 *
124 * Revision 1.5.14.5 97/11/18 10:27:17 rvb
125 * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
126 * cfs_nb_foo and cfs_foo are joined
127 *
128 * Revision 1.5.14.4 97/11/13 22:03:01 rvb
129 * pass2 cfs_NetBSD.h mt
130 *
131 * Revision 1.5.14.3 97/11/12 12:09:40 rvb
132 * reorg pass1
133 *
134 * Revision 1.5.14.2 97/10/29 16:06:28 rvb
135 * Kill DYING
136 *
137 * Revision 1.5.14.1 1997/10/28 23:10:17 rvb
138 * >64Meg; venus can be killed!
139 *
140 * Revision 1.5 1997/01/13 17:11:07 bnoble
141 * Coda statfs needs to return something other than -1 for blocks avail. and
142 * files available for wabi (and other windowsish) programs to install
143 * there correctly.
144 *
145 * Revision 1.4 1996/12/12 22:11:00 bnoble
146 * Fixed the "downcall invokes venus operation" deadlock in all known cases.
147 * There may be more
148 *
149 * Revision 1.3 1996/11/08 18:06:12 bnoble
150 * Minor changes in vnode operation signature, VOP_UPDATE signature, and
151 * some newly defined bits in the include files.
152 *
153 * Revision 1.2 1996/01/02 16:57:04 bnoble
154 * Added support for Coda MiniCache and raw inode calls (final commit)
155 *
156 * Revision 1.1.2.1 1995/12/20 01:57:32 bnoble
157 * Added CODA-specific files
158 *
159 * Revision 3.1.1.1 1995/03/04 19:08:02 bnoble
160 * Branch for NetBSD port revisions
161 *
162 * Revision 3.1 1995/03/04 19:08:01 bnoble
163 * Bump to major revision 3 to prepare for NetBSD port
164 *
165 * Revision 2.4 1995/02/17 16:25:22 dcs
166 * These versions represent several changes:
167 * 1. Allow venus to restart even if outstanding references exist.
168 * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d
169 * 3. Allow ody_expand to return many members, not just one.
170 *
171 * Revision 2.3 94/10/14 09:58:21 dcs
172 * Made changes 'cause sun4s have braindead compilers
173 *
174 * Revision 2.2 94/10/12 16:46:33 dcs
175 * Cleaned kernel/venus interface by removing XDR junk, plus
176 * so cleanup to allow this code to be more easily ported.
177 *
178 * Revision 1.3 93/05/28 16:24:29 bnoble
179 * *** empty log message ***
180 *
181 * Revision 1.2 92/10/27 17:58:24 lily
182 * merge kernel/latest and alpha/src/cfs
183 *
184 * Revision 2.3 92/09/30 14:16:32 mja
185 * Added call to coda_flush to coda_unmount.
186 * [90/12/15 dcs]
187 *
188 * Added contributors blurb.
189 * [90/12/13 jjk]
190 *
191 * Revision 2.2 90/07/05 11:26:40 mrt
192 * Created for the Coda File System.
193 * [90/05/23 dcs]
194 *
195 * Revision 1.3 90/05/31 17:01:42 dcs
196 * Prepare for merge with facilities kernel.
197 *
198 *
199 */
200
201 #ifdef _LKM
202 #define NVCODA 4
203 #else
204 #include <vcoda.h>
205 #endif
206
207 #include <sys/param.h>
208 #include <sys/systm.h>
209 #include <sys/malloc.h>
210 #include <sys/conf.h>
211 #include <sys/namei.h>
212 #include <sys/mount.h>
213 #include <sys/proc.h>
214 #include <sys/select.h>
215
216 #include <coda/coda.h>
217 #include <coda/cnode.h>
218 #include <coda/coda_vfsops.h>
219 #include <coda/coda_venus.h>
220 #include <coda/coda_subr.h>
221 #include <coda/coda_opstats.h>
222 /* for VN_RDEV */
223 #include <miscfs/specfs/specdev.h>
224
225 int codadebug = 0;
226
227 int coda_vfsop_print_entry = 0;
228 #define ENTRY if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__FUNCTION__))
229
230 struct vnode *coda_ctlvp;
231 struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */
232
233 /* structure to keep statistics of internally generated/satisfied calls */
234
235 struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE];
236
237 #define MARK_ENTRY(op) (coda_vfsopstats[op].entries++)
238 #define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++)
239 #define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++)
240 #define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++)
241
242 extern int coda_nc_initialized; /* Set if cache has been initialized */
243 extern int vc_nb_open __P((dev_t, int, int, struct proc *));
244 extern struct cdevsw cdevsw[]; /* For sanity check in coda_mount */
245 extern struct vnodeopv_desc coda_vnodeop_opv_desc;
246
247 struct vnodeopv_desc *coda_vnodeopv_descs[] = {
248 &coda_vnodeop_opv_desc,
249 NULL,
250 };
251
252 struct vfsops coda_vfsops = {
253 MOUNT_CODA,
254 coda_mount,
255 coda_start,
256 coda_unmount,
257 coda_root,
258 coda_quotactl,
259 coda_nb_statfs,
260 coda_sync,
261 coda_vget,
262 (int (*) (struct mount *, struct fid *, struct vnode ** ))
263 eopnotsupp,
264 (int (*) (struct vnode *, struct fid *)) eopnotsupp,
265 coda_init,
266 coda_sysctl,
267 (int (*)(void)) eopnotsupp,
268 (int (*)(struct mount *, struct mbuf *, int *, struct ucred **))
269 eopnotsupp,
270 coda_vnodeopv_descs,
271 0
272 };
273
274 int
275 coda_vfsopstats_init(void)
276 {
277 register int i;
278
279 for (i=0;i<CODA_VFSOPS_SIZE;i++) {
280 coda_vfsopstats[i].opcode = i;
281 coda_vfsopstats[i].entries = 0;
282 coda_vfsopstats[i].sat_intrn = 0;
283 coda_vfsopstats[i].unsat_intrn = 0;
284 coda_vfsopstats[i].gen_intrn = 0;
285 }
286
287 return 0;
288 }
289
290 /*
291 * cfs mount vfsop
292 * Set up mount info record and attach it to vfs struct.
293 */
294 /*ARGSUSED*/
295 int
296 coda_mount(vfsp, path, data, ndp, p)
297 struct mount *vfsp; /* Allocated and initialized by mount(2) */
298 const char *path; /* path covered: ignored by the fs-layer */
299 void *data; /* Need to define a data type for this in netbsd? */
300 struct nameidata *ndp; /* Clobber this to lookup the device name */
301 struct proc *p; /* The ever-famous proc pointer */
302 {
303 struct vnode *dvp;
304 struct cnode *cp;
305 dev_t dev;
306 struct coda_mntinfo *mi;
307 struct vnode *rootvp;
308 ViceFid rootfid;
309 ViceFid ctlfid;
310 int error;
311
312 ENTRY;
313
314 coda_vfsopstats_init();
315 coda_vnodeopstats_init();
316
317 MARK_ENTRY(CODA_MOUNT_STATS);
318 if (CODA_MOUNTED(vfsp)) {
319 MARK_INT_FAIL(CODA_MOUNT_STATS);
320 return(EBUSY);
321 }
322
323 /* Validate mount device. Similar to getmdev(). */
324
325 NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, p);
326 error = namei(ndp);
327 dvp = ndp->ni_vp;
328
329 if (error) {
330 MARK_INT_FAIL(CODA_MOUNT_STATS);
331 return (error);
332 }
333 if (dvp->v_type != VCHR) {
334 MARK_INT_FAIL(CODA_MOUNT_STATS);
335 vrele(dvp);
336 return(ENXIO);
337 }
338 dev = dvp->v_specinfo->si_rdev;
339 vrele(dvp);
340 if (major(dev) >= nchrdev || major(dev) < 0) {
341 MARK_INT_FAIL(CODA_MOUNT_STATS);
342 return(ENXIO);
343 }
344
345 /*
346 * See if the device table matches our expectations.
347 */
348 if (cdevsw[major(dev)].d_open != vc_nb_open)
349 {
350 MARK_INT_FAIL(CODA_MOUNT_STATS);
351 return(ENXIO);
352 }
353
354 if (minor(dev) >= NVCODA || minor(dev) < 0) {
355 MARK_INT_FAIL(CODA_MOUNT_STATS);
356 return(ENXIO);
357 }
358
359 /*
360 * Initialize the mount record and link it to the vfs struct
361 */
362 mi = &coda_mnttbl[minor(dev)];
363
364 if (!VC_OPEN(&mi->mi_vcomm)) {
365 MARK_INT_FAIL(CODA_MOUNT_STATS);
366 return(ENODEV);
367 }
368
369 /* No initialization (here) of mi_vcomm! */
370 vfsp->mnt_data = (qaddr_t)mi;
371 vfsp->mnt_stat.f_fsid.val[0] = 0;
372 vfsp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_CODA);
373 mi->mi_vfsp = vfsp;
374
375 /*
376 * Make a root vnode to placate the Vnode interface, but don't
377 * actually make the CODA_ROOT call to venus until the first call
378 * to coda_root in case a server is down while venus is starting.
379 */
380 rootfid.Volume = 0;
381 rootfid.Vnode = 0;
382 rootfid.Unique = 0;
383 cp = make_coda_node(&rootfid, vfsp, VDIR);
384 rootvp = CTOV(cp);
385 rootvp->v_flag |= VROOT;
386
387 ctlfid.Volume = CTL_VOL;
388 ctlfid.Vnode = CTL_VNO;
389 ctlfid.Unique = CTL_UNI;
390 /* cp = make_coda_node(&ctlfid, vfsp, VCHR);
391 The above code seems to cause a loop in the cnode links.
392 I don't totally understand when it happens, it is caught
393 when closing down the system.
394 */
395 cp = make_coda_node(&ctlfid, 0, VCHR);
396
397 coda_ctlvp = CTOV(cp);
398
399 /* Add vfs and rootvp to chain of vfs hanging off mntinfo */
400 mi->mi_vfsp = vfsp;
401 mi->mi_rootvp = rootvp;
402
403 /* set filesystem block size */
404 vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */
405
406 /* error is currently guaranteed to be zero, but in case some
407 code changes... */
408 CODADEBUG(1,
409 myprintf(("coda_mount returned %d\n",error)););
410 if (error)
411 MARK_INT_FAIL(CODA_MOUNT_STATS);
412 else
413 MARK_INT_SAT(CODA_MOUNT_STATS);
414
415 return(error);
416 }
417
418 int
419 coda_start(vfsp, flags, p)
420 struct mount *vfsp;
421 int flags;
422 struct proc *p;
423 {
424 ENTRY;
425 return (0);
426 }
427
428 int
429 coda_unmount(vfsp, mntflags, p)
430 struct mount *vfsp;
431 int mntflags;
432 struct proc *p;
433 {
434 struct coda_mntinfo *mi = vftomi(vfsp);
435 int active, error = 0;
436
437 ENTRY;
438 MARK_ENTRY(CODA_UMOUNT_STATS);
439 if (!CODA_MOUNTED(vfsp)) {
440 MARK_INT_FAIL(CODA_UMOUNT_STATS);
441 return(EINVAL);
442 }
443
444 if (mi->mi_vfsp == vfsp) { /* We found the victim */
445 if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp)))
446 return (EBUSY); /* Venus is still running */
447
448 #ifdef DEBUG
449 printf("coda_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp));
450 #endif
451 vrele(mi->mi_rootvp);
452
453 active = coda_kill(vfsp, NOT_DOWNCALL);
454 mi->mi_rootvp->v_flag &= ~VROOT;
455 error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE);
456 printf("coda_unmount: active = %d, vflush active %d\n", active, error);
457 error = 0;
458
459 /* I'm going to take this out to allow lookups to go through. I'm
460 * not sure it's important anyway. -- DCS 2/2/94
461 */
462 /* vfsp->VFS_DATA = NULL; */
463
464 /* No more vfsp's to hold onto */
465 mi->mi_vfsp = NULL;
466 mi->mi_rootvp = NULL;
467
468 if (error)
469 MARK_INT_FAIL(CODA_UMOUNT_STATS);
470 else
471 MARK_INT_SAT(CODA_UMOUNT_STATS);
472
473 return(error);
474 }
475 return (EINVAL);
476 }
477
478 /*
479 * find root of cfs
480 */
481 int
482 coda_root(vfsp, vpp)
483 struct mount *vfsp;
484 struct vnode **vpp;
485 {
486 struct coda_mntinfo *mi = vftomi(vfsp);
487 struct vnode **result;
488 int error;
489 struct proc *p = curproc; /* XXX - bnoble */
490 ViceFid VFid;
491
492 ENTRY;
493 MARK_ENTRY(CODA_ROOT_STATS);
494 result = NULL;
495
496 if (vfsp == mi->mi_vfsp) {
497 if ((VTOC(mi->mi_rootvp)->c_fid.Volume != 0) ||
498 (VTOC(mi->mi_rootvp)->c_fid.Vnode != 0) ||
499 (VTOC(mi->mi_rootvp)->c_fid.Unique != 0))
500 { /* Found valid root. */
501 *vpp = mi->mi_rootvp;
502 /* On Mach, this is vref. On NetBSD, VOP_LOCK */
503 vref(*vpp);
504 vn_lock(*vpp, LK_EXCLUSIVE);
505 MARK_INT_SAT(CODA_ROOT_STATS);
506 return(0);
507 }
508 }
509
510 error = venus_root(vftomi(vfsp), p->p_cred->pc_ucred, p, &VFid);
511
512 if (!error) {
513 /*
514 * Save the new rootfid in the cnode, and rehash the cnode into the
515 * cnode hash with the new fid key.
516 */
517 coda_unsave(VTOC(mi->mi_rootvp));
518 VTOC(mi->mi_rootvp)->c_fid = VFid;
519 coda_save(VTOC(mi->mi_rootvp));
520
521 *vpp = mi->mi_rootvp;
522 vref(*vpp);
523 vn_lock(*vpp, LK_EXCLUSIVE);
524 MARK_INT_SAT(CODA_ROOT_STATS);
525 goto exit;
526 } else if (error == ENODEV || error == EINTR) {
527 /* Gross hack here! */
528 /*
529 * If Venus fails to respond to the CODA_ROOT call, coda_call returns
530 * ENODEV. Return the uninitialized root vnode to allow vfs
531 * operations such as unmount to continue. Without this hack,
532 * there is no way to do an unmount if Venus dies before a
533 * successful CODA_ROOT call is done. All vnode operations
534 * will fail.
535 */
536 *vpp = mi->mi_rootvp;
537 vref(*vpp);
538 vn_lock(*vpp, LK_EXCLUSIVE);
539 MARK_INT_FAIL(CODA_ROOT_STATS);
540 error = 0;
541 goto exit;
542 } else {
543 CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n", error)); );
544 MARK_INT_FAIL(CODA_ROOT_STATS);
545
546 goto exit;
547 }
548 exit:
549 return(error);
550 }
551
552 int
553 coda_quotactl(vfsp, cmd, uid, arg, p)
554 struct mount *vfsp;
555 int cmd;
556 uid_t uid;
557 caddr_t arg;
558 struct proc *p;
559 {
560 ENTRY;
561 return (EOPNOTSUPP);
562 }
563
564 /*
565 * Get file system statistics.
566 */
567 int
568 coda_nb_statfs(vfsp, sbp, p)
569 register struct mount *vfsp;
570 struct statfs *sbp;
571 struct proc *p;
572 {
573 ENTRY;
574 /* MARK_ENTRY(CODA_STATFS_STATS); */
575 if (!CODA_MOUNTED(vfsp)) {
576 /* MARK_INT_FAIL(CODA_STATFS_STATS);*/
577 return(EINVAL);
578 }
579
580 bzero(sbp, sizeof(struct statfs));
581 /* XXX - what to do about f_flags, others? --bnoble */
582 /* Below This is what AFS does
583 #define NB_SFS_SIZ 0x895440
584 */
585 /* Note: Normal fs's have a bsize of 0x400 == 1024 */
586 sbp->f_type = 0;
587 sbp->f_bsize = 8192; /* XXX */
588 sbp->f_iosize = 8192; /* XXX */
589 #define NB_SFS_SIZ 0x8AB75D
590 sbp->f_blocks = NB_SFS_SIZ;
591 sbp->f_bfree = NB_SFS_SIZ;
592 sbp->f_bavail = NB_SFS_SIZ;
593 sbp->f_files = NB_SFS_SIZ;
594 sbp->f_ffree = NB_SFS_SIZ;
595 bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t));
596 strncpy(sbp->f_fstypename, MOUNT_CODA, MFSNAMELEN-1);
597 strcpy(sbp->f_mntonname, "/coda");
598 strcpy(sbp->f_mntfromname, "CODA");
599 /* MARK_INT_SAT(CODA_STATFS_STATS); */
600 return(0);
601 }
602
603 /*
604 * Flush any pending I/O.
605 */
606 int
607 coda_sync(vfsp, waitfor, cred, p)
608 struct mount *vfsp;
609 int waitfor;
610 struct ucred *cred;
611 struct proc *p;
612 {
613 ENTRY;
614 MARK_ENTRY(CODA_SYNC_STATS);
615 MARK_INT_SAT(CODA_SYNC_STATS);
616 return(0);
617 }
618
619 int
620 coda_vget(vfsp, ino, vpp)
621 struct mount *vfsp;
622 ino_t ino;
623 struct vnode **vpp;
624 {
625 ENTRY;
626 return (EOPNOTSUPP);
627 }
628
629 /*
630 * fhtovp is now what vget used to be in 4.3-derived systems. For
631 * some silly reason, vget is now keyed by a 32 bit ino_t, rather than
632 * a type-specific fid.
633 */
634 int
635 coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
636 register struct mount *vfsp;
637 struct fid *fhp;
638 struct mbuf *nam;
639 struct vnode **vpp;
640 int *exflagsp;
641 struct ucred **creadanonp;
642 {
643 struct cfid *cfid = (struct cfid *)fhp;
644 struct cnode *cp = 0;
645 int error;
646 struct proc *p = curproc; /* XXX -mach */
647 ViceFid VFid;
648 int vtype;
649
650 ENTRY;
651
652 MARK_ENTRY(CODA_VGET_STATS);
653 /* Check for vget of control object. */
654 if (IS_CTL_FID(&cfid->cfid_fid)) {
655 *vpp = coda_ctlvp;
656 vref(coda_ctlvp);
657 MARK_INT_SAT(CODA_VGET_STATS);
658 return(0);
659 }
660
661 error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_cred->pc_ucred, p, &VFid, &vtype);
662
663 if (error) {
664 CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));)
665 *vpp = (struct vnode *)0;
666 } else {
667 CODADEBUG(CODA_VGET,
668 myprintf(("vget: vol %lx vno %lx uni %lx type %d result %d\n",
669 VFid.Volume, VFid.Vnode, VFid.Unique, vtype, error)); )
670
671 cp = make_coda_node(&VFid, vfsp, vtype);
672 *vpp = CTOV(cp);
673 }
674 return(error);
675 }
676
677 int
678 coda_vptofh(vnp, fidp)
679 struct vnode *vnp;
680 struct fid *fidp;
681 {
682 ENTRY;
683 return (EOPNOTSUPP);
684 }
685
686 void
687 coda_init(void)
688 {
689 ENTRY;
690 }
691
692 int
693 coda_sysctl(name, namelen, oldp, oldlp, newp, newl, p)
694 int *name;
695 u_int namelen;
696 void *oldp;
697 size_t *oldlp;
698 void *newp;
699 size_t newl;
700 struct proc *p;
701 {
702
703 /* all sysctl names at this level are terminal */
704 if (namelen != 1)
705 return (ENOTDIR); /* overloaded */
706
707 switch (name[0]) {
708 /*
709 case FFS_CLUSTERREAD:
710 return (sysctl_int(oldp, oldlp, newp, newl, &doclusterread));
711 */
712 default:
713 return (EOPNOTSUPP);
714 }
715 /* NOTREACHED */
716 }
717
718 /*
719 * To allow for greater ease of use, some vnodes may be orphaned when
720 * Venus dies. Certain operations should still be allowed to go
721 * through, but without propagating ophan-ness. So this function will
722 * get a new vnode for the file from the current run of Venus. */
723
724 int
725 getNewVnode(vpp)
726 struct vnode **vpp;
727 {
728 struct cfid cfid;
729 struct coda_mntinfo *mi = vftomi((*vpp)->v_mount);
730
731 ENTRY;
732
733 cfid.cfid_len = (short)sizeof(ViceFid);
734 cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */
735 /* XXX ? */
736
737 /* We're guessing that if set, the 1st element on the list is a
738 * valid vnode to use. If not, return ENODEV as venus is dead.
739 */
740 if (mi->mi_vfsp == NULL)
741 return ENODEV;
742
743 return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp,
744 NULL, NULL);
745 }
746
747 #include <ufs/ufs/quota.h>
748 #include <ufs/ufs/ufsmount.h>
749 /* get the mount structure corresponding to a given device. Assume
750 * device corresponds to a UFS. Return NULL if no device is found.
751 */
752 struct mount *devtomp(dev)
753 dev_t dev;
754 {
755 struct mount *mp, *nmp;
756
757 for (mp = mountlist.cqh_first; mp != (void*)&mountlist; mp = nmp) {
758 nmp = mp->mnt_list.cqe_next;
759 if ((!strcmp(mp->mnt_op->vfs_name, MOUNT_UFS)) &&
760 ((VFSTOUFS(mp))->um_dev == (dev_t) dev)) {
761 /* mount corresponds to UFS and the device matches one we want */
762 return(mp);
763 }
764 }
765 /* mount structure wasn't found */
766 return(NULL);
767 }
768