coda_vfsops.c revision 39650 
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/cfs/coda_vfsops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
30 *  $Id: coda_vfsops.c,v 1.5 1998/09/13 13:57:59 rvb Exp $
31 *
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 1.5  1998/09/13 13:57:59  rvb
51 * Finish conversion of cfs -> coda
52 *
53 * Revision 1.4  1998/09/11 18:50:17  rvb
54 * All the references to cfs, in symbols, structs, and strings
55 * have been changed to coda.  (Same for CFS.)
56 *
57 * Revision 1.2  1998/09/02 19:09:53  rvb
58 * Pass2 complete
59 *
60 * Revision 1.1.1.1  1998/08/29 21:14:52  rvb
61 * Very Preliminary Coda
62 *
63 * Revision 1.11  1998/08/28 18:12:22  rvb
64 * Now it also works on FreeBSD -current.  This code will be
65 * committed to the FreeBSD -current and NetBSD -current
66 * trees.  It will then be tailored to the particular platform
67 * by flushing conditional code.
68 *
69 * Revision 1.10  1998/08/18 17:05:19  rvb
70 * Don't use __RCSID now
71 *
72 * Revision 1.9  1998/08/18 16:31:44  rvb
73 * Sync the code for NetBSD -current; test on 1.3 later
74 *
75 * Revision 1.8  98/02/24  22:22:48  rvb
76 * Fixes up mainly to flush iopen and friends
77 *
78 * Revision 1.7  98/01/23  11:53:45  rvb
79 * Bring RVB_CODA1_1 to HEAD
80 *
81 * Revision 1.6.2.6  98/01/23  11:21:07  rvb
82 * Sync with 2.2.5
83 *
84 * Revision 1.6.2.5  98/01/22  13:05:33  rvb
85 * Move make_coda_node ctlfid later so vfsp is known
86 *
87 * Revision 1.6.2.4  97/12/19  14:26:05  rvb
88 * session id
89 *
90 * Revision 1.6.2.3  97/12/16  12:40:11  rvb
91 * Sync with 1.3
92 *
93 * Revision 1.6.2.2  97/12/10  11:40:25  rvb
94 * No more ody
95 *
96 * Revision 1.6.2.1  97/12/06  17:41:24  rvb
97 * Sync with peters coda.h
98 *
99 * Revision 1.6  97/12/05  10:39:21  rvb
100 * Read CHANGES
101 *
102 * Revision 1.5.14.8  97/11/24  15:44:46  rvb
103 * Final cfs_venus.c w/o macros, but one locking bug
104 *
105 * Revision 1.5.14.7  97/11/21  13:22:03  rvb
106 * Catch a few coda_calls in coda_vfsops.c
107 *
108 * Revision 1.5.14.6  97/11/20  11:46:48  rvb
109 * Capture current cfs_venus
110 *
111 * Revision 1.5.14.5  97/11/18  10:27:17  rvb
112 * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
113 * cfs_nb_foo and cfs_foo are joined
114 *
115 * Revision 1.5.14.4  97/11/13  22:03:01  rvb
116 * pass2 cfs_NetBSD.h mt
117 *
118 * Revision 1.5.14.3  97/11/12  12:09:40  rvb
119 * reorg pass1
120 *
121 * Revision 1.5.14.2  97/10/29  16:06:28  rvb
122 * Kill DYING
123 *
124 * Revision 1.5.14.1  1997/10/28 23:10:17  rvb
125 * >64Meg; venus can be killed!
126 *
127 * Revision 1.5  1997/01/13 17:11:07  bnoble
128 * Coda statfs needs to return something other than -1 for blocks avail. and
129 * files available for wabi (and other windowsish) programs to install
130 * there correctly.
131 *
132 * Revision 1.4  1996/12/12 22:11:00  bnoble
133 * Fixed the "downcall invokes venus operation" deadlock in all known cases.
134 * There may be more
135 *
136 * Revision 1.3  1996/11/08 18:06:12  bnoble
137 * Minor changes in vnode operation signature, VOP_UPDATE signature, and
138 * some newly defined bits in the include files.
139 *
140 * Revision 1.2  1996/01/02 16:57:04  bnoble
141 * Added support for Coda MiniCache and raw inode calls (final commit)
142 *
143 * Revision 1.1.2.1  1995/12/20 01:57:32  bnoble
144 * Added CODA-specific files
145 *
146 * Revision 3.1.1.1  1995/03/04  19:08:02  bnoble
147 * Branch for NetBSD port revisions
148 *
149 * Revision 3.1  1995/03/04  19:08:01  bnoble
150 * Bump to major revision 3 to prepare for NetBSD port
151 *
152 * Revision 2.4  1995/02/17  16:25:22  dcs
153 * These versions represent several changes:
154 * 1. Allow venus to restart even if outstanding references exist.
155 * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d
156 * 3. Allow ody_expand to return many members, not just one.
157 *
158 * Revision 2.3  94/10/14  09:58:21  dcs
159 * Made changes 'cause sun4s have braindead compilers
160 *
161 * Revision 2.2  94/10/12  16:46:33  dcs
162 * Cleaned kernel/venus interface by removing XDR junk, plus
163 * so cleanup to allow this code to be more easily ported.
164 *
165 * Revision 1.3  93/05/28  16:24:29  bnoble
166 * *** empty log message ***
167 *
168 * Revision 1.2  92/10/27  17:58:24  lily
169 * merge kernel/latest and alpha/src/cfs
170 *
171 * Revision 2.3  92/09/30  14:16:32  mja
172 * 	Added call to coda_flush to coda_unmount.
173 * 	[90/12/15            dcs]
174 *
175 * 	Added contributors blurb.
176 * 	[90/12/13            jjk]
177 *
178 * Revision 2.2  90/07/05  11:26:40  mrt
179 * 	Created for the Coda File System.
180 * 	[90/05/23            dcs]
181 *
182 * Revision 1.3  90/05/31  17:01:42  dcs
183 * Prepare for merge with facilities kernel.
184 *
185 *
186 */
187
188#ifdef	ACTUALLY_LKM_NOT_KERNEL
189#define NVCODA 4
190#else
191#include <vcoda.h>
192#endif
193
194#include <sys/param.h>
195#include <sys/systm.h>
196#include <sys/kernel.h>
197#include <sys/proc.h>
198#include <sys/malloc.h>
199#include <sys/conf.h>
200#include <sys/namei.h>
201#include <sys/mount.h>
202#include <sys/select.h>
203
204#include <coda/coda.h>
205#include <coda/cnode.h>
206#include <coda/coda_vfsops.h>
207#include <coda/coda_venus.h>
208#include <coda/coda_subr.h>
209#include <coda/coda_opstats.h>
210
211#include <miscfs/specfs/specdev.h>
212
213MALLOC_DEFINE(M_CODA, "CODA storage", "Various Coda Structures");
214
215int codadebug = 0;
216int coda_vfsop_print_entry = 0;
217#define ENTRY    if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__FUNCTION__))
218
219struct vnode *coda_ctlvp;
220struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */
221
222/* structure to keep statistics of internally generated/satisfied calls */
223
224struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE];
225
226#define MARK_ENTRY(op) (coda_vfsopstats[op].entries++)
227#define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++)
228#define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++)
229#define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++)
230
231extern int coda_nc_initialized;     /* Set if cache has been initialized */
232extern int vc_nb_open __P((dev_t, int, int, struct proc *));
233
234int
235coda_vfsopstats_init(void)
236{
237	register int i;
238
239	for (i=0;i<CODA_VFSOPS_SIZE;i++) {
240		coda_vfsopstats[i].opcode = i;
241		coda_vfsopstats[i].entries = 0;
242		coda_vfsopstats[i].sat_intrn = 0;
243		coda_vfsopstats[i].unsat_intrn = 0;
244		coda_vfsopstats[i].gen_intrn = 0;
245	}
246
247	return 0;
248}
249
250/*
251 * cfs mount vfsop
252 * Set up mount info record and attach it to vfs struct.
253 */
254/*ARGSUSED*/
255int
256coda_mount(vfsp, path, data, ndp, p)
257    struct mount *vfsp;		/* Allocated and initialized by mount(2) */
258    char *path;			/* path covered: ignored by the fs-layer */
259    caddr_t data;		/* Need to define a data type for this in netbsd? */
260    struct nameidata *ndp;	/* Clobber this to lookup the device name */
261    struct proc *p;		/* The ever-famous proc pointer */
262{
263    struct vnode *dvp;
264    struct cnode *cp;
265    dev_t dev;
266    struct coda_mntinfo *mi;
267    struct vnode *rootvp;
268    ViceFid rootfid;
269    ViceFid ctlfid;
270    int error;
271
272    ENTRY;
273
274    coda_vfsopstats_init();
275    coda_vnodeopstats_init();
276
277    MARK_ENTRY(CODA_MOUNT_STATS);
278    if (CODA_MOUNTED(vfsp)) {
279	MARK_INT_FAIL(CODA_MOUNT_STATS);
280	return(EBUSY);
281    }
282
283    /* Validate mount device.  Similar to getmdev(). */
284
285    NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, p);
286    error = namei(ndp);
287    dvp = ndp->ni_vp;
288
289    if (error) {
290	MARK_INT_FAIL(CODA_MOUNT_STATS);
291	return (error);
292    }
293    if (dvp->v_type != VCHR) {
294	MARK_INT_FAIL(CODA_MOUNT_STATS);
295	vrele(dvp);
296	return(ENXIO);
297    }
298    dev = dvp->v_specinfo->si_rdev;
299    vrele(dvp);
300    if (major(dev) >= nchrdev || major(dev) < 0) {
301	MARK_INT_FAIL(CODA_MOUNT_STATS);
302	return(ENXIO);
303    }
304
305    /*
306     * See if the device table matches our expectations.
307     */
308    if (cdevsw[major(dev)]->d_open != vc_nb_open)
309    {
310	MARK_INT_FAIL(CODA_MOUNT_STATS);
311	return(ENXIO);
312    }
313
314    if (minor(dev) >= NVCODA || minor(dev) < 0) {
315	MARK_INT_FAIL(CODA_MOUNT_STATS);
316	return(ENXIO);
317    }
318
319    /*
320     * Initialize the mount record and link it to the vfs struct
321     */
322    mi = &coda_mnttbl[minor(dev)];
323
324    if (!VC_OPEN(&mi->mi_vcomm)) {
325	MARK_INT_FAIL(CODA_MOUNT_STATS);
326	return(ENODEV);
327    }
328
329    /* No initialization (here) of mi_vcomm! */
330    vfsp->mnt_data = (qaddr_t)mi;
331    vfs_getnewfsid (vfsp);
332
333    mi->mi_vfsp = vfsp;
334
335    /*
336     * Make a root vnode to placate the Vnode interface, but don't
337     * actually make the CODA_ROOT call to venus until the first call
338     * to coda_root in case a server is down while venus is starting.
339     */
340    rootfid.Volume = 0;
341    rootfid.Vnode = 0;
342    rootfid.Unique = 0;
343    cp = make_coda_node(&rootfid, vfsp, VDIR);
344    rootvp = CTOV(cp);
345    rootvp->v_flag |= VROOT;
346
347    ctlfid.Volume = CTL_VOL;
348    ctlfid.Vnode = CTL_VNO;
349    ctlfid.Unique = CTL_UNI;
350/*  cp = make_coda_node(&ctlfid, vfsp, VCHR);
351    The above code seems to cause a loop in the cnode links.
352    I don't totally understand when it happens, it is caught
353    when closing down the system.
354 */
355    cp = make_coda_node(&ctlfid, 0, VCHR);
356
357    coda_ctlvp = CTOV(cp);
358
359    /* Add vfs and rootvp to chain of vfs hanging off mntinfo */
360    mi->mi_vfsp = vfsp;
361    mi->mi_rootvp = rootvp;
362
363    /* set filesystem block size */
364    vfsp->mnt_stat.f_bsize = 8192;	    /* XXX -JJK */
365
366    /* Set f_iosize.  XXX -- inamura@isl.ntt.co.jp.
367       For vnode_pager_haspage() references. The value should be obtained
368       from underlying UFS. */
369    /* Checked UFS. iosize is set as 8192 */
370    vfsp->mnt_stat.f_iosize = 8192;
371
372    /* error is currently guaranteed to be zero, but in case some
373       code changes... */
374    CODADEBUG(1,
375	     myprintf(("coda_mount returned %d\n",error)););
376    if (error)
377	MARK_INT_FAIL(CODA_MOUNT_STATS);
378    else
379	MARK_INT_SAT(CODA_MOUNT_STATS);
380
381    return(error);
382}
383
384int
385coda_start(vfsp, flags, p)
386    struct mount *vfsp;
387    int flags;
388    struct proc *p;
389{
390    ENTRY;
391    return (0);
392}
393
394int
395coda_unmount(vfsp, mntflags, p)
396    struct mount *vfsp;
397    int mntflags;
398    struct proc *p;
399{
400    struct coda_mntinfo *mi = vftomi(vfsp);
401    int active, error = 0;
402
403    ENTRY;
404    MARK_ENTRY(CODA_UMOUNT_STATS);
405    if (!CODA_MOUNTED(vfsp)) {
406	MARK_INT_FAIL(CODA_UMOUNT_STATS);
407	return(EINVAL);
408    }
409
410    if (mi->mi_vfsp == vfsp) {	/* We found the victim */
411	if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp)))
412	    return (EBUSY); 	/* Venus is still running */
413
414#ifdef	DEBUG
415	printf("coda_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp));
416#endif
417	vrele(mi->mi_rootvp);
418
419	active = coda_kill(vfsp, NOT_DOWNCALL);
420	error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE);
421	printf("coda_unmount: active = %d, vflush active %d\n", active, error);
422	error = 0;
423	/* I'm going to take this out to allow lookups to go through. I'm
424	 * not sure it's important anyway. -- DCS 2/2/94
425	 */
426	/* vfsp->VFS_DATA = NULL; */
427
428	/* No more vfsp's to hold onto */
429	mi->mi_vfsp = NULL;
430	mi->mi_rootvp = NULL;
431
432	if (error)
433	    MARK_INT_FAIL(CODA_UMOUNT_STATS);
434	else
435	    MARK_INT_SAT(CODA_UMOUNT_STATS);
436
437	return(error);
438    }
439    return (EINVAL);
440}
441
442/*
443 * find root of cfs
444 */
445int
446coda_root(vfsp, vpp)
447	struct mount *vfsp;
448	struct vnode **vpp;
449{
450    struct coda_mntinfo *mi = vftomi(vfsp);
451    struct vnode **result;
452    int error;
453    struct proc *p = curproc;    /* XXX - bnoble */
454    ViceFid VFid;
455
456    ENTRY;
457    MARK_ENTRY(CODA_ROOT_STATS);
458    result = NULL;
459
460    if (vfsp == mi->mi_vfsp) {
461	if ((VTOC(mi->mi_rootvp)->c_fid.Volume != 0) ||
462	    (VTOC(mi->mi_rootvp)->c_fid.Vnode != 0) ||
463	    (VTOC(mi->mi_rootvp)->c_fid.Unique != 0))
464	    { /* Found valid root. */
465		*vpp = mi->mi_rootvp;
466		/* On Mach, this is vref.  On NetBSD, VOP_LOCK */
467#if	1
468		vref(*vpp);
469		vn_lock(*vpp, LK_EXCLUSIVE, p);
470#else
471		vget(*vpp, LK_EXCLUSIVE, p);
472#endif
473		MARK_INT_SAT(CODA_ROOT_STATS);
474		return(0);
475	    }
476    }
477
478    error = venus_root(vftomi(vfsp), p->p_cred->pc_ucred, p, &VFid);
479
480    if (!error) {
481	/*
482	 * Save the new rootfid in the cnode, and rehash the cnode into the
483	 * cnode hash with the new fid key.
484	 */
485	coda_unsave(VTOC(mi->mi_rootvp));
486	VTOC(mi->mi_rootvp)->c_fid = VFid;
487	coda_save(VTOC(mi->mi_rootvp));
488
489	*vpp = mi->mi_rootvp;
490#if	1
491	vref(*vpp);
492	vn_lock(*vpp, LK_EXCLUSIVE, p);
493#else
494	vget(*vpp, LK_EXCLUSIVE, p);
495#endif
496
497	MARK_INT_SAT(CODA_ROOT_STATS);
498	goto exit;
499    } else if (error == ENODEV) {
500	/* Gross hack here! */
501	/*
502	 * If Venus fails to respond to the CODA_ROOT call, coda_call returns
503	 * ENODEV. Return the uninitialized root vnode to allow vfs
504	 * operations such as unmount to continue. Without this hack,
505	 * there is no way to do an unmount if Venus dies before a
506	 * successful CODA_ROOT call is done. All vnode operations
507	 * will fail.
508	 */
509	*vpp = mi->mi_rootvp;
510#if	1
511	vref(*vpp);
512	vn_lock(*vpp, LK_EXCLUSIVE, p);
513#else
514	vget(*vpp, LK_EXCLUSIVE, p);
515#endif
516
517	MARK_INT_FAIL(CODA_ROOT_STATS);
518	error = 0;
519	goto exit;
520    } else {
521	CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n", error)); );
522	MARK_INT_FAIL(CODA_ROOT_STATS);
523
524	goto exit;
525    }
526
527 exit:
528    return(error);
529}
530
531int
532coda_quotactl(vfsp, cmd, uid, arg, p)
533    struct mount *vfsp;
534    int cmd;
535    uid_t uid;
536    caddr_t arg;
537    struct proc *p;
538{
539    ENTRY;
540    return (EOPNOTSUPP);
541}
542
543/*
544 * Get file system statistics.
545 */
546int
547coda_nb_statfs(vfsp, sbp, p)
548    register struct mount *vfsp;
549    struct statfs *sbp;
550    struct proc *p;
551{
552    ENTRY;
553/*  MARK_ENTRY(CODA_STATFS_STATS); */
554    if (!CODA_MOUNTED(vfsp)) {
555/*	MARK_INT_FAIL(CODA_STATFS_STATS);*/
556	return(EINVAL);
557    }
558
559    bzero(sbp, sizeof(struct statfs));
560    /* XXX - what to do about f_flags, others? --bnoble */
561    /* Below This is what AFS does
562    	#define NB_SFS_SIZ 0x895440
563     */
564    /* Note: Normal fs's have a bsize of 0x400 == 1024 */
565    sbp->f_type = vfsp->mnt_vfc->vfc_typenum;
566    sbp->f_bsize = 8192; /* XXX */
567    sbp->f_iosize = 8192; /* XXX */
568#define NB_SFS_SIZ 0x8AB75D
569    sbp->f_blocks = NB_SFS_SIZ;
570    sbp->f_bfree = NB_SFS_SIZ;
571    sbp->f_bavail = NB_SFS_SIZ;
572    sbp->f_files = NB_SFS_SIZ;
573    sbp->f_ffree = NB_SFS_SIZ;
574    bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t));
575    strcpy(sbp->f_mntonname, "/coda");
576    strcpy(sbp->f_mntfromname, "CODA");
577/*  MARK_INT_SAT(CODA_STATFS_STATS); */
578    return(0);
579}
580
581/*
582 * Flush any pending I/O.
583 */
584int
585coda_sync(vfsp, waitfor, cred, p)
586    struct mount *vfsp;
587    int    waitfor;
588    struct ucred *cred;
589    struct proc *p;
590{
591    ENTRY;
592    MARK_ENTRY(CODA_SYNC_STATS);
593    MARK_INT_SAT(CODA_SYNC_STATS);
594    return(0);
595}
596
597int
598coda_vget(vfsp, ino, vpp)
599    struct mount *vfsp;
600    ino_t ino;
601    struct vnode **vpp;
602{
603    ENTRY;
604    return (EOPNOTSUPP);
605}
606
607/*
608 * fhtovp is now what vget used to be in 4.3-derived systems.  For
609 * some silly reason, vget is now keyed by a 32 bit ino_t, rather than
610 * a type-specific fid.
611 */
612int
613coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
614    register struct mount *vfsp;
615    struct fid *fhp;
616    struct mbuf *nam;
617    struct vnode **vpp;
618    int *exflagsp;
619    struct ucred **creadanonp;
620{
621    struct cfid *cfid = (struct cfid *)fhp;
622    struct cnode *cp = 0;
623    int error;
624    struct proc *p = curproc; /* XXX -mach */
625    ViceFid VFid;
626    int vtype;
627
628    ENTRY;
629
630    MARK_ENTRY(CODA_VGET_STATS);
631    /* Check for vget of control object. */
632    if (IS_CTL_FID(&cfid->cfid_fid)) {
633	*vpp = coda_ctlvp;
634	vref(coda_ctlvp);
635	MARK_INT_SAT(CODA_VGET_STATS);
636	return(0);
637    }
638
639    error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_cred->pc_ucred, p, &VFid, &vtype);
640
641    if (error) {
642	CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));)
643	    *vpp = (struct vnode *)0;
644    } else {
645	CODADEBUG(CODA_VGET,
646		 myprintf(("vget: vol %lx vno %lx uni %lx type %d result %d\n",
647			VFid.Volume, VFid.Vnode, VFid.Unique, vtype, error)); )
648
649	cp = make_coda_node(&VFid, vfsp, vtype);
650	*vpp = CTOV(cp);
651    }
652    return(error);
653}
654
655int
656coda_vptofh(vnp, fidp)
657    struct vnode *vnp;
658    struct fid   *fidp;
659{
660    ENTRY;
661    return (EOPNOTSUPP);
662}
663
664int
665coda_init(struct vfsconf *vfsp)
666{
667    ENTRY;
668    return 0;
669}
670
671/*
672 * To allow for greater ease of use, some vnodes may be orphaned when
673 * Venus dies.  Certain operations should still be allowed to go
674 * through, but without propagating ophan-ness.  So this function will
675 * get a new vnode for the file from the current run of Venus.  */
676
677int
678getNewVnode(vpp)
679     struct vnode **vpp;
680{
681    struct cfid cfid;
682    struct coda_mntinfo *mi = vftomi((*vpp)->v_mount);
683
684    ENTRY;
685
686    cfid.cfid_len = (short)sizeof(ViceFid);
687    cfid.cfid_fid = VTOC(*vpp)->c_fid;	/* Structure assignment. */
688    /* XXX ? */
689
690    /* We're guessing that if set, the 1st element on the list is a
691     * valid vnode to use. If not, return ENODEV as venus is dead.
692     */
693    if (mi->mi_vfsp == NULL)
694	return ENODEV;
695
696    return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp,
697		      NULL, NULL);
698}
699
700#include <ufs/ufs/quota.h>
701#include <ufs/ufs/ufsmount.h>
702/* get the mount structure corresponding to a given device.  Assume
703 * device corresponds to a UFS. Return NULL if no device is found.
704 */
705struct mount *devtomp(dev)
706    dev_t dev;
707{
708    struct mount *mp, *nmp;
709
710    for (mp = mountlist.cqh_first; mp != (void*)&mountlist; mp = nmp) {
711	nmp = mp->mnt_list.cqe_next;
712	if (((VFSTOUFS(mp))->um_dev == (dev_t) dev)) {
713	    /* mount corresponds to UFS and the device matches one we want */
714	    return(mp);
715	}
716    }
717    /* mount structure wasn't found */
718    return(NULL);
719}
720
721struct vfsops coda_vfsops = {
722    coda_mount,
723    coda_start,
724    coda_unmount,
725    coda_root,
726    coda_quotactl,
727    coda_nb_statfs,
728    coda_sync,
729    coda_vget,
730    (int (*) (struct mount *, struct fid *, struct sockaddr *, struct vnode **,
731	      int *, struct ucred **))
732	eopnotsupp,
733    (int (*) (struct vnode *, struct fid *)) eopnotsupp,
734    coda_init,
735};
736
737#ifdef	ACTUALLY_LKM_NOT_KERNEL
738/*
739 * This case is being handled in coda_fbsd.c
740 * What we want is too hairy for VFS_SET to get right!
741 */
742#else
743VFS_SET(coda_vfsops, coda, VFCF_NETWORK);
744#endif
745