Very Preliminary Coda

1 files changed, 887 insertions, 0 deletions

diff --git a/sys/coda/coda_vfsops.c b/sys/coda/coda_vfsops.c
new file mode 100644
index 0000000..d44533a
--- /dev/null
+++ b/sys/coda/coda_vfsops.c
@@ -0,0 +1,887 @@
+/*
+
+            Coda: an Experimental Distributed File System
+                             Release 3.1
+
+          Copyright (c) 1987-1998 Carnegie Mellon University
+                         All Rights Reserved
+
+Permission  to  use, copy, modify and distribute this software and its
+documentation is hereby granted,  provided  that  both  the  copyright
+notice  and  this  permission  notice  appear  in  all  copies  of the
+software, derivative works or  modified  versions,  and  any  portions
+thereof, and that both notices appear in supporting documentation, and
+that credit is given to Carnegie Mellon University  in  all  documents
+and publicity pertaining to direct or indirect use of this code or its
+derivatives.
+
+CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS  KNOWN  TO  HAVE  BUGS,
+SOME  OF  WHICH MAY HAVE SERIOUS CONSEQUENCES.  CARNEGIE MELLON ALLOWS
+FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION.   CARNEGIE  MELLON
+DISCLAIMS  ANY  LIABILITY  OF  ANY  KIND  FOR  ANY  DAMAGES WHATSOEVER
+RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE  OR  OF
+ANY DERIVATIVE WORK.
+
+Carnegie  Mellon  encourages  users  of  this  software  to return any
+improvements or extensions that  they  make,  and  to  grant  Carnegie
+Mellon the rights to redistribute these changes without encumbrance.
+*/
+
+/* $Header: /afs/cs/project/coda-src/cvs/coda/kernel-src/vfs/freebsd/cfs/cfs_vfsops.c,v 1.11 1998/08/28 18:12:22 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1989 Carnegie-Mellon University
+ * All rights reserved.  The CMU software License Agreement specifies
+ * the terms and conditions for use and redistribution.
+ */
+
+/*
+ * This code was written for the Coda file system at Carnegie Mellon
+ * University.  Contributers include David Steere, James Kistler, and
+ * M. Satyanarayanan.  
+ */
+
+/*
+ * HISTORY
+ * $Log: cfs_vfsops.c,v $
+ * Revision 1.11  1998/08/28 18:12:22  rvb
+ * Now it also works on FreeBSD -current.  This code will be
+ * committed to the FreeBSD -current and NetBSD -current
+ * trees.  It will then be tailored to the particular platform
+ * by flushing conditional code.
+ *
+ * Revision 1.10  1998/08/18 17:05:19  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.9  1998/08/18 16:31:44  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.8  98/02/24  22:22:48  rvb
+ * Fixes up mainly to flush iopen and friends
+ * 
+ * Revision 1.7  98/01/23  11:53:45  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.6.2.6  98/01/23  11:21:07  rvb
+ * Sync with 2.2.5
+ * 
+ * Revision 1.6.2.5  98/01/22  13:05:33  rvb
+ * Move makecfsnode ctlfid later so vfsp is known
+ * 
+ * Revision 1.6.2.4  97/12/19  14:26:05  rvb
+ * session id
+ * 
+ * Revision 1.6.2.3  97/12/16  12:40:11  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.6.2.2  97/12/10  11:40:25  rvb
+ * No more ody
+ * 
+ * Revision 1.6.2.1  97/12/06  17:41:24  rvb
+ * Sync with peters coda.h
+ * 
+ * Revision 1.6  97/12/05  10:39:21  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.5.14.8  97/11/24  15:44:46  rvb
+ * Final cfs_venus.c w/o macros, but one locking bug
+ * 
+ * Revision 1.5.14.7  97/11/21  13:22:03  rvb
+ * Catch a few cfscalls in cfs_vfsops.c
+ * 
+ * Revision 1.5.14.6  97/11/20  11:46:48  rvb
+ * Capture current cfs_venus
+ * 
+ * Revision 1.5.14.5  97/11/18  10:27:17  rvb
+ * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
+ * cfs_nb_foo and cfs_foo are joined
+ * 
+ * Revision 1.5.14.4  97/11/13  22:03:01  rvb
+ * pass2 cfs_NetBSD.h mt
+ * 
+ * Revision 1.5.14.3  97/11/12  12:09:40  rvb
+ * reorg pass1
+ * 
+ * Revision 1.5.14.2  97/10/29  16:06:28  rvb
+ * Kill DYING
+ * 
+ * Revision 1.5.14.1  1997/10/28 23:10:17  rvb
+ * >64Meg; venus can be killed!
+ *
+ * Revision 1.5  1997/01/13 17:11:07  bnoble
+ * Coda statfs needs to return something other than -1 for blocks avail. and
+ * files available for wabi (and other windowsish) programs to install
+ * there correctly.
+ *
+ * Revision 1.4  1996/12/12 22:11:00  bnoble
+ * Fixed the "downcall invokes venus operation" deadlock in all known cases.
+ * There may be more
+ *
+ * Revision 1.3  1996/11/08 18:06:12  bnoble
+ * Minor changes in vnode operation signature, VOP_UPDATE signature, and
+ * some newly defined bits in the include files.
+ *
+ * Revision 1.2  1996/01/02 16:57:04  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ *
+ * Revision 1.1.2.1  1995/12/20 01:57:32  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 3.1.1.1  1995/03/04  19:08:02  bnoble
+ * Branch for NetBSD port revisions
+ *
+ * Revision 3.1  1995/03/04  19:08:01  bnoble
+ * Bump to major revision 3 to prepare for NetBSD port
+ *
+ * Revision 2.4  1995/02/17  16:25:22  dcs
+ * These versions represent several changes:
+ * 1. Allow venus to restart even if outstanding references exist.
+ * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d
+ * 3. Allow ody_expand to return many members, not just one.
+ *
+ * Revision 2.3  94/10/14  09:58:21  dcs
+ * Made changes 'cause sun4s have braindead compilers
+ * 
+ * Revision 2.2  94/10/12  16:46:33  dcs
+ * Cleaned kernel/venus interface by removing XDR junk, plus
+ * so cleanup to allow this code to be more easily ported.
+ * 
+ * Revision 1.3  93/05/28  16:24:29  bnoble
+ * *** empty log message ***
+ * 
+ * Revision 1.2  92/10/27  17:58:24  lily
+ * merge kernel/latest and alpha/src/cfs
+ * 
+ * Revision 2.3  92/09/30  14:16:32  mja
+ * 	Added call to cfs_flush to cfs_unmount.
+ * 	[90/12/15            dcs]
+ * 
+ * 	Added contributors blurb.
+ * 	[90/12/13            jjk]
+ * 
+ * Revision 2.2  90/07/05  11:26:40  mrt
+ * 	Created for the Coda File System.
+ * 	[90/05/23            dcs]
+ * 
+ * Revision 1.3  90/05/31  17:01:42  dcs
+ * Prepare for merge with facilities kernel.
+ * 
+ * 
+ */ 
+#include <vcfs.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/conf.h>
+#include <sys/namei.h>
+#include <sys/mount.h>
+#include <sys/proc.h>
+#include <sys/select.h>
+
+#include <cfs/coda.h>
+#include <cfs/cnode.h>
+#include <cfs/cfs_vfsops.h>
+#include <cfs/cfs_venus.h>
+#include <cfs/cfs_subr.h>
+#include <cfs/coda_opstats.h>
+/* for VN_RDEV */
+#include <miscfs/specfs/specdev.h>
+
+#ifdef	__FreeBSD__
+#ifdef	__FreeBSD_version
+MALLOC_DEFINE(M_CFS, "CFS storage", "Various Coda Structures");
+#endif
+#endif
+
+int cfsdebug = 0;
+
+int cfs_vfsop_print_entry = 0;
+#ifdef __GNUC__
+#define ENTRY    \
+    if(cfs_vfsop_print_entry) myprintf(("Entered %s\n",__FUNCTION__))
+#else
+#define ENTRY
+#endif 
+
+
+struct vnode *cfs_ctlvp;
+struct cfs_mntinfo cfs_mnttbl[NVCFS]; /* indexed by minor device number */
+
+/* structure to keep statistics of internally generated/satisfied calls */
+
+struct cfs_op_stats cfs_vfsopstats[CFS_VFSOPS_SIZE];
+
+#define MARK_ENTRY(op) (cfs_vfsopstats[op].entries++)
+#define MARK_INT_SAT(op) (cfs_vfsopstats[op].sat_intrn++)
+#define MARK_INT_FAIL(op) (cfs_vfsopstats[op].unsat_intrn++)
+#define MRAK_INT_GEN(op) (cfs_vfsopstats[op].gen_intrn++)
+
+extern int cfsnc_initialized;     /* Set if cache has been initialized */
+extern int vc_nb_open __P((dev_t, int, int, struct proc *));
+#ifdef	__NetBSD__
+extern struct cdevsw cdevsw[];    /* For sanity check in cfs_mount */
+#endif
+/* NetBSD interface to statfs */
+
+#if	defined(__NetBSD__) && defined(NetBSD1_3) && (NetBSD1_3 >= 5)
+extern struct vnodeopv_desc cfs_vnodeop_opv_desc;
+
+struct vnodeopv_desc *cfs_vnodeopv_descs[] = {
+	&cfs_vnodeop_opv_desc,
+	NULL,
+};
+
+struct vfsops cfs_vfsops = {
+    MOUNT_CFS,
+    cfs_mount,
+    cfs_start,
+    cfs_unmount,
+    cfs_root,
+    cfs_quotactl,
+    cfs_nb_statfs,
+    cfs_sync,
+    cfs_vget,
+    (int (*) (struct mount *, struct fid *, struct mbuf *, struct vnode **,
+	      int *, struct ucred **))
+	eopnotsupp,
+    (int (*) (struct vnode *, struct fid *)) eopnotsupp,
+    cfs_init,
+#if (NetBSD1_3 >= 7)
+    cfs_sysctl,
+#endif
+    (int (*)(void)) eopnotsupp,
+    cfs_vnodeopv_descs,
+    0
+};
+#elif	defined(__NetBSD__)
+struct vfsops cfs_vfsops = {
+    MOUNT_CFS,
+    cfs_mount,
+    cfs_start,
+    cfs_unmount,
+    cfs_root,
+    cfs_quotactl,
+    cfs_nb_statfs,
+    cfs_sync,
+    cfs_vget,
+    (int (*) (struct mount *, struct fid *, struct mbuf *, struct vnode **,
+	      int *, struct ucred **))
+	eopnotsupp,
+    (int (*) (struct vnode *, struct fid *)) eopnotsupp,
+    cfs_init,
+#ifdef	NetBSD1_3
+    (int (*)(void)) eopnotsupp,
+#endif
+    0
+};
+
+#elif	defined(__FreeBSD__)
+#ifdef	__FreeBSD_version
+struct vfsops cfs_vfsops = {
+    cfs_mount,
+    cfs_start,
+    cfs_unmount,
+    cfs_root,
+    cfs_quotactl,
+    cfs_nb_statfs,
+    cfs_sync,
+    cfs_vget,
+    (int (*) (struct mount *, struct fid *, struct sockaddr *, struct vnode **,
+	      int *, struct ucred **))
+	eopnotsupp,
+    (int (*) (struct vnode *, struct fid *)) eopnotsupp,
+    cfs_init,
+};
+
+#else
+struct vfsops cfs_vfsops = {
+    cfs_mount,
+    cfs_start,
+    cfs_unmount,
+    cfs_root,
+    cfs_quotactl,
+    cfs_nb_statfs,
+    cfs_sync,
+    cfs_vget,
+    (int (*) (struct mount *, struct fid *, struct mbuf *, struct vnode **,
+	      int *, struct ucred **))
+	eopnotsupp,
+    (int (*) (struct vnode *, struct fid *)) eopnotsupp,
+    cfs_init,
+};
+
+#endif
+
+
+#include <sys/kernel.h>
+VFS_SET(cfs_vfsops, cfs, MOUNT_CFS, VFCF_NETWORK);
+#endif
+
+int
+cfs_vfsopstats_init(void)
+{
+	register int i;
+	
+	for (i=0;i<CFS_VFSOPS_SIZE;i++) {
+		cfs_vfsopstats[i].opcode = i;
+		cfs_vfsopstats[i].entries = 0;
+		cfs_vfsopstats[i].sat_intrn = 0;
+		cfs_vfsopstats[i].unsat_intrn = 0;
+		cfs_vfsopstats[i].gen_intrn = 0;
+	}
+	
+	return 0;
+}
+
+
+/*
+ * cfs mount vfsop
+ * Set up mount info record and attach it to vfs struct.
+ */
+/*ARGSUSED*/
+int
+cfs_mount(vfsp, path, data, ndp, p)
+    struct mount *vfsp;		/* Allocated and initialized by mount(2) */
+#ifdef	NetBSD1_3
+    const char *path;		/* path covered: ignored by the fs-layer */
+    void *data;			/* Need to define a data type for this in netbsd? */
+#else
+    char *path;			/* path covered: ignored by the fs-layer */
+    caddr_t data;		/* Need to define a data type for this in netbsd? */
+#endif
+    struct nameidata *ndp;	/* Clobber this to lookup the device name */
+    struct proc *p;		/* The ever-famous proc pointer */
+{
+    struct vnode *dvp;
+    struct cnode *cp;
+    dev_t dev;
+    struct cfs_mntinfo *mi;
+    struct vnode *rootvp;
+    ViceFid rootfid;
+    ViceFid ctlfid;
+    int error;
+
+    ENTRY;
+
+    cfs_vfsopstats_init();
+    cfs_vnodeopstats_init();
+    
+    MARK_ENTRY(CFS_MOUNT_STATS);
+    if (CFS_MOUNTED(vfsp)) {
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+	return(EBUSY);
+    }
+    
+    /* Validate mount device.  Similar to getmdev(). */
+
+    NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, p);
+    error = namei(ndp);
+    dvp = ndp->ni_vp;
+
+    if (error) {
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+	return (error);
+    }
+    if (dvp->v_type != VCHR) {
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+	vrele(dvp);
+	return(ENXIO);
+    }
+    dev = dvp->v_specinfo->si_rdev;
+    vrele(dvp);
+    if (major(dev) >= nchrdev || major(dev) < 0) {
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+	return(ENXIO);
+    }
+
+    /*
+     * See if the device table matches our expectations.
+     */
+#ifdef	__NetBSD__
+    if (cdevsw[major(dev)].d_open != vc_nb_open)
+#elif	defined(__FreeBSD__)
+    if (cdevsw[major(dev)]->d_open != vc_nb_open)
+#endif
+    {
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+	return(ENXIO);
+    }
+    
+    if (minor(dev) >= NVCFS || minor(dev) < 0) {
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+	return(ENXIO);
+    }
+    
+    /*
+     * Initialize the mount record and link it to the vfs struct
+     */
+    mi = &cfs_mnttbl[minor(dev)];
+    
+    if (!VC_OPEN(&mi->mi_vcomm)) {
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+	return(ENODEV);
+    }
+    
+    /* No initialization (here) of mi_vcomm! */
+    vfsp->mnt_data = (qaddr_t)mi;
+#ifdef	__NetBSD__
+    vfsp->mnt_stat.f_fsid.val[0] = 0;
+    vfsp->mnt_stat.f_fsid.val[1] = makefstype(MOUNT_CFS);
+#elif	defined(__FreeBSD__) && defined(__FreeBSD_version)
+
+    vfs_getnewfsid (vfsp);
+
+#elif	defined(__FreeBSD__)
+    /* Seems a bit overkill, since usualy /coda is the only mount point
+     * for cfs.
+     */
+    getnewfsid (vfsp, MOUNT_CFS);
+#endif
+    mi->mi_vfsp = vfsp;
+    
+    /*
+     * Make a root vnode to placate the Vnode interface, but don't
+     * actually make the CFS_ROOT call to venus until the first call
+     * to cfs_root in case a server is down while venus is starting.
+     */
+    rootfid.Volume = 0;
+    rootfid.Vnode = 0;
+    rootfid.Unique = 0;
+    cp = makecfsnode(&rootfid, vfsp, VDIR);
+    rootvp = CTOV(cp);
+    rootvp->v_flag |= VROOT;
+	
+    ctlfid.Volume = CTL_VOL;
+    ctlfid.Vnode = CTL_VNO;
+    ctlfid.Unique = CTL_UNI;
+/*  cp = makecfsnode(&ctlfid, vfsp, VCHR);
+    The above code seems to cause a loop in the cnode links.
+    I don't totally understand when it happens, it is caught
+    when closing down the system.
+ */
+    cp = makecfsnode(&ctlfid, 0, VCHR);
+
+    cfs_ctlvp = CTOV(cp);
+
+    /* Add vfs and rootvp to chain of vfs hanging off mntinfo */
+    mi->mi_vfsp = vfsp;
+    mi->mi_rootvp = rootvp;
+    
+    /* set filesystem block size */
+    vfsp->mnt_stat.f_bsize = 8192;	    /* XXX -JJK */
+#ifdef	 __FreeBSD__
+    /* Set f_iosize.  XXX -- inamura@isl.ntt.co.jp. 
+       For vnode_pager_haspage() references. The value should be obtained 
+       from underlying UFS. */
+    /* Checked UFS. iosize is set as 8192 */
+    vfsp->mnt_stat.f_iosize = 8192;
+#endif
+
+    /* error is currently guaranteed to be zero, but in case some
+       code changes... */
+    CFSDEBUG(1,
+	     myprintf(("cfs_mount returned %d\n",error)););
+    if (error)
+	MARK_INT_FAIL(CFS_MOUNT_STATS);
+    else
+	MARK_INT_SAT(CFS_MOUNT_STATS);
+    
+    return(error);
+}
+
+int
+cfs_start(vfsp, flags, p)
+    struct mount *vfsp;
+    int flags;
+    struct proc *p;
+{
+    ENTRY;
+    return (0);
+}
+
+int
+cfs_unmount(vfsp, mntflags, p)
+    struct mount *vfsp;
+    int mntflags;
+    struct proc *p;
+{
+    struct cfs_mntinfo *mi = vftomi(vfsp);
+    int active, error = 0;
+    
+    ENTRY;
+    MARK_ENTRY(CFS_UMOUNT_STATS);
+    if (!CFS_MOUNTED(vfsp)) {
+	MARK_INT_FAIL(CFS_UMOUNT_STATS);
+	return(EINVAL);
+    }
+    
+    if (mi->mi_vfsp == vfsp) {	/* We found the victim */
+	if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp)))
+	    return (EBUSY); 	/* Venus is still running */
+
+#ifdef	DEBUG
+	printf("cfs_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp));
+#endif
+	vrele(mi->mi_rootvp);
+
+#ifdef	NetBSD1_3
+	active = cfs_kill(vfsp, NOT_DOWNCALL);
+
+#if	defined(__NetBSD__) && defined(NetBSD1_3) && (NetBSD1_3 >= 7)
+	if (1)
+#else
+	if ((error = vfs_busy(mi->mi_vfsp)) == 0)
+#endif
+	{
+		error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE);
+		printf("cfs_unmount: active = %d, vflush active %d\n", active, error);
+		error = 0;
+	} else {
+		printf("cfs_unmount: busy\n");
+	} 
+#else	/* FreeBSD I guess */
+	active = cfs_kill(vfsp, NOT_DOWNCALL);
+	error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE);
+	printf("cfs_unmount: active = %d, vflush active %d\n", active, error);
+	error = 0;
+#endif
+	/* I'm going to take this out to allow lookups to go through. I'm
+	 * not sure it's important anyway. -- DCS 2/2/94
+	 */
+	/* vfsp->VFS_DATA = NULL; */
+
+	/* No more vfsp's to hold onto */
+	mi->mi_vfsp = NULL;
+	mi->mi_rootvp = NULL;
+
+	if (error)
+	    MARK_INT_FAIL(CFS_UMOUNT_STATS);
+	else
+	    MARK_INT_SAT(CFS_UMOUNT_STATS);
+
+	return(error);
+    }
+    return (EINVAL);
+}
+
+/*
+ * find root of cfs
+ */
+int
+cfs_root(vfsp, vpp)
+	struct mount *vfsp;
+	struct vnode **vpp;
+{
+    struct cfs_mntinfo *mi = vftomi(vfsp);
+    struct vnode **result;
+    int error;
+    struct proc *p = curproc;    /* XXX - bnoble */
+    ViceFid VFid;
+
+    ENTRY;
+    MARK_ENTRY(CFS_ROOT_STATS);
+    result = NULL;
+    
+    if (vfsp == mi->mi_vfsp) {
+	if ((VTOC(mi->mi_rootvp)->c_fid.Volume != 0) ||
+	    (VTOC(mi->mi_rootvp)->c_fid.Vnode != 0) ||
+	    (VTOC(mi->mi_rootvp)->c_fid.Unique != 0))
+	    { /* Found valid root. */
+		*vpp = mi->mi_rootvp;
+		/* On Mach, this is vref.  On NetBSD, VOP_LOCK */
+		vref(*vpp);
+		VOP_X_LOCK(*vpp, LK_EXCLUSIVE);
+		MARK_INT_SAT(CFS_ROOT_STATS);
+		return(0);
+	    }
+    }
+
+    error = venus_root(vftomi(vfsp), p->p_cred->pc_ucred, p, &VFid);
+
+    if (!error) {
+	/*
+	 * Save the new rootfid in the cnode, and rehash the cnode into the
+	 * cnode hash with the new fid key.
+	 */
+	cfs_unsave(VTOC(mi->mi_rootvp));
+	VTOC(mi->mi_rootvp)->c_fid = VFid;
+	cfs_save(VTOC(mi->mi_rootvp));
+
+	*vpp = mi->mi_rootvp;
+	vref(*vpp);
+	VOP_X_LOCK(*vpp, LK_EXCLUSIVE);
+	MARK_INT_SAT(CFS_ROOT_STATS);
+	goto exit;
+    } else if (error == ENODEV) {
+	/* Gross hack here! */
+	/*
+	 * If Venus fails to respond to the CFS_ROOT call, cfscall returns
+	 * ENODEV. Return the uninitialized root vnode to allow vfs
+	 * operations such as unmount to continue. Without this hack,
+	 * there is no way to do an unmount if Venus dies before a 
+	 * successful CFS_ROOT call is done. All vnode operations 
+	 * will fail.
+	 */
+	*vpp = mi->mi_rootvp;
+	vref(*vpp);
+	VOP_X_LOCK(*vpp, LK_EXCLUSIVE);
+	MARK_INT_FAIL(CFS_ROOT_STATS);
+	error = 0;
+	goto exit;
+    } else {
+	CFSDEBUG( CFS_ROOT, myprintf(("error %d in CFS_ROOT\n", error)); );
+	MARK_INT_FAIL(CFS_ROOT_STATS);
+		
+	goto exit;
+    }
+ exit:
+    return(error);
+}
+
+int
+cfs_quotactl(vfsp, cmd, uid, arg, p)
+    struct mount *vfsp;
+    int cmd;
+    uid_t uid;
+    caddr_t arg;
+    struct proc *p;
+{
+    ENTRY;
+    return (EOPNOTSUPP);
+}
+     
+/*
+ * Get file system statistics.
+ */
+int
+cfs_nb_statfs(vfsp, sbp, p)
+    register struct mount *vfsp;
+    struct statfs *sbp;
+    struct proc *p;
+{
+    ENTRY;
+/*  MARK_ENTRY(CFS_STATFS_STATS); */
+    if (!CFS_MOUNTED(vfsp)) {
+/*	MARK_INT_FAIL(CFS_STATFS_STATS);*/
+	return(EINVAL);
+    }
+    
+    bzero(sbp, sizeof(struct statfs));
+    /* XXX - what to do about f_flags, others? --bnoble */
+    /* Below This is what AFS does
+    	#define NB_SFS_SIZ 0x895440
+     */
+    /* Note: Normal fs's have a bsize of 0x400 == 1024 */
+#ifdef	__NetBSD__
+    sbp->f_type = 0;
+#elif	defined(__FreeBSD__)
+    sbp->f_type = MOUNT_CFS;
+#endif
+    sbp->f_bsize = 8192; /* XXX */
+    sbp->f_iosize = 8192; /* XXX */
+#define NB_SFS_SIZ 0x8AB75D
+    sbp->f_blocks = NB_SFS_SIZ;
+    sbp->f_bfree = NB_SFS_SIZ;
+    sbp->f_bavail = NB_SFS_SIZ;
+    sbp->f_files = NB_SFS_SIZ;
+    sbp->f_ffree = NB_SFS_SIZ;
+    bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t));
+#ifdef	__NetBSD__
+    strncpy(sbp->f_fstypename, MOUNT_CFS, MFSNAMELEN-1);
+#endif
+    strcpy(sbp->f_mntonname, "/coda");
+    strcpy(sbp->f_mntfromname, "CFS");
+/*  MARK_INT_SAT(CFS_STATFS_STATS); */
+    return(0);
+}
+
+/*
+ * Flush any pending I/O.
+ */
+int
+cfs_sync(vfsp, waitfor, cred, p)
+    struct mount *vfsp;
+    int    waitfor;
+    struct ucred *cred;
+    struct proc *p;
+{
+    ENTRY;
+    MARK_ENTRY(CFS_SYNC_STATS);
+    MARK_INT_SAT(CFS_SYNC_STATS);
+    return(0);
+}
+
+int
+cfs_vget(vfsp, ino, vpp)
+    struct mount *vfsp;
+    ino_t ino;
+    struct vnode **vpp;
+{
+    ENTRY;
+    return (EOPNOTSUPP);
+}
+
+/* 
+ * fhtovp is now what vget used to be in 4.3-derived systems.  For
+ * some silly reason, vget is now keyed by a 32 bit ino_t, rather than
+ * a type-specific fid.  
+ */
+int
+cfs_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
+    register struct mount *vfsp;    
+    struct fid *fhp;
+    struct mbuf *nam;
+    struct vnode **vpp;
+    int *exflagsp;
+    struct ucred **creadanonp;
+{
+    struct cfid *cfid = (struct cfid *)fhp;
+    struct cnode *cp = 0;
+    int error;
+    struct proc *p = curproc; /* XXX -mach */
+    ViceFid VFid;
+    int vtype;
+
+    ENTRY;
+    
+    MARK_ENTRY(CFS_VGET_STATS);
+    /* Check for vget of control object. */
+    if (IS_CTL_FID(&cfid->cfid_fid)) {
+	*vpp = cfs_ctlvp;
+	vref(cfs_ctlvp);
+	MARK_INT_SAT(CFS_VGET_STATS);
+	return(0);
+    }
+    
+    error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_cred->pc_ucred, p, &VFid, &vtype);
+    
+    if (error) {
+	CFSDEBUG(CFS_VGET, myprintf(("vget error %d\n",error));)
+	    *vpp = (struct vnode *)0;
+    } else {
+	CFSDEBUG(CFS_VGET, 
+		 myprintf(("vget: vol %lx vno %lx uni %lx type %d result %d\n",
+			VFid.Volume, VFid.Vnode, VFid.Unique, vtype, error)); )
+	    
+	cp = makecfsnode(&VFid, vfsp, vtype);
+	*vpp = CTOV(cp);
+    }
+    return(error);
+}
+
+int
+cfs_vptofh(vnp, fidp)
+    struct vnode *vnp;
+    struct fid   *fidp;
+{
+    ENTRY;
+    return (EOPNOTSUPP);
+}
+
+#ifdef	__NetBSD__ 
+void
+cfs_init(void)
+{
+    ENTRY;
+}
+#elif	defined(__FreeBSD__)
+#ifdef	__FreeBSD_version
+int
+cfs_init(struct vfsconf *vfsp)
+{
+    ENTRY;
+    return 0;
+}
+#else
+int
+cfs_init(void)
+{
+    ENTRY;
+    return 0;
+}
+#endif
+#endif
+
+#if	defined(__NetBSD__) && defined(NetBSD1_3) && (NetBSD1_3 >= 7)
+int
+cfs_sysctl(name, namelen, oldp, oldlp, newp, newl, p)
+	int *name;
+	u_int namelen;
+	void *oldp;
+	size_t *oldlp;
+	void *newp;
+	size_t newl;
+	struct proc *p;
+{
+
+	/* all sysctl names at this level are terminal */
+	if (namelen != 1)
+		return (ENOTDIR);		/* overloaded */
+
+	switch (name[0]) {
+/*
+	case FFS_CLUSTERREAD:
+		return (sysctl_int(oldp, oldlp, newp, newl, &doclusterread));
+ */
+	default:
+		return (EOPNOTSUPP);
+	}
+	/* NOTREACHED */
+}
+#endif
+
+/*
+ * To allow for greater ease of use, some vnodes may be orphaned when
+ * Venus dies.  Certain operations should still be allowed to go
+ * through, but without propagating ophan-ness.  So this function will
+ * get a new vnode for the file from the current run of Venus.  */
+ 
+int
+getNewVnode(vpp)
+     struct vnode **vpp;
+{
+    struct cfid cfid;
+    struct cfs_mntinfo *mi = vftomi((*vpp)->v_mount);
+    
+    ENTRY;
+
+    cfid.cfid_len = (short)sizeof(ViceFid);
+    cfid.cfid_fid = VTOC(*vpp)->c_fid;	/* Structure assignment. */
+    /* XXX ? */
+
+    /* We're guessing that if set, the 1st element on the list is a
+     * valid vnode to use. If not, return ENODEV as venus is dead.
+     */
+    if (mi->mi_vfsp == NULL)
+	return ENODEV;
+    
+    return cfs_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp,
+		      NULL, NULL);
+}
+
+#include <ufs/ufs/quota.h>
+#include <ufs/ufs/ufsmount.h>
+/* get the mount structure corresponding to a given device.  Assume 
+ * device corresponds to a UFS. Return NULL if no device is found.
+ */ 
+struct mount *devtomp(dev)
+    dev_t dev;
+{
+    struct mount *mp, *nmp;
+    
+    for (mp = mountlist.cqh_first; mp != (void*)&mountlist; mp = nmp) {
+	nmp = mp->mnt_list.cqe_next;
+	if (
+#ifdef	__NetBSD__
+	    (!strcmp(mp->mnt_op->vfs_name, MOUNT_UFS)) &&
+#endif
+	    ((VFSTOUFS(mp))->um_dev == (dev_t) dev)) {
+	    /* mount corresponds to UFS and the device matches one we want */
+	    return(mp); 
+	}
+    }
+    /* mount structure wasn't found */ 
+    return(NULL); 
+}