Very Preliminary Coda

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diff --git a/sys/fs/coda/README b/sys/fs/coda/README
new file mode 100644
index 0000000..49ccad6
--- /dev/null
+++ b/sys/fs/coda/README
@@ -0,0 +1,60 @@
+                Announcing the Availability of the
+                        Coda Distributed
+                           Filesystem
+                              for
+                         BSD Unix Systems
+
+        Coda is a distributed file system like NFS and AFS.  It is
+freely available, like NFS.  But it functions much like AFS in being a
+"stateful" file system.  Coda and AFS cache files on your local
+machine to improve performance.  But Coda goes a step further than AFS
+by letting you access the cached files when there is no available
+network, viz. disconnected laptops and network outages.  In Coda, both
+the client and server are outside the kernel which makes them easier
+to experiment with.
+
+To get more information on Coda, I would like to refer people to
+        http://www.coda.cs.cmu.edu
+There is a wealth of documents, papers, theses there.  There is also a
+good introduction to the Coda File System in
+        http://www.coda.cs.cmu.edu/ljpaper/lj.html
+
+Coda was originally developed as an academic prototype/testbed.  It is
+being polished and rewritten where necessary.  Coda is a work in
+progress and does have bugs.  It is, though, very usable.  Our
+interest is in making Coda available to as many people as possible and
+to have Coda evolve and flourish.
+
+The bulk of the Coda file system code supports the Coda client
+program, the Coda server program and the utilities needed by both.
+All these programs are unix programs and can run equally well on any
+Unix platform.  Our main development thrust is improving these
+programs.  There is a small part of Coda that deals with the kernel to
+file system interface.  This code is OS specific (but should not be
+platform specific).
+
+Coda is currently available for several OS's and platforms:
+        Freebsd-2.2.5: i386
+        Freebsd-2.2.6: i386
+	Freebsd -current: i386
+        linux 2.0: i386 & sparc
+        linux 2.1: i386 & sparc
+        NetBSD 1.3: i386
+	NetBSD -current: i386
+The relevant sources, binaries, and docs can be found in
+        ftp://ftp.coda.cs.cmu.edu/pub/coda/
+
+We intend to come out with new Coda releases often, not daily.  We
+don't wish to slight any OS/platform not mentioned above.  We are just
+limited in our resources as to what we can support internally.  We
+will be happy to integrate OpenBSD support as well as other OS
+support.  Also, adding platform support is relatively easy and we can
+discuss this.  The only problem is that Coda has a light weight
+process package.  It does some manipulations in assembler which would
+have to be redone for a different platform.
+
+There are several mailing lists @coda.cs.cmu.edu that discuss coda:
+coda-announce and linux-coda.  We are going to revise linux-coda to be
+OS neutral, since it is mainly Coda we want to discuss.  We appreciate
+comments, feedback, bug reports, bug fixes, enhancements, etc.
+
diff --git a/sys/fs/coda/TODO b/sys/fs/coda/TODO
new file mode 100644
index 0000000..f19b4b6
--- /dev/null
+++ b/sys/fs/coda/TODO
@@ -0,0 +1,12 @@
+Near term:
+	Existing VOP_LOCKS's should proabably be 
+	 vn_lock since that is what they were in -stable.
+	Fix bug in executing/mapping new files.
+
+Medium term:
+	Add missing VFS methods.
+	Do performance profile.
+	Tune hash algorithm used in cfs_namecache.
+
+Eventually:
+	Use standard queue macros.
diff --git a/sys/fs/coda/cnode.h b/sys/fs/coda/cnode.h
new file mode 100644
index 0000000..901dc8a
--- /dev/null
+++ b/sys/fs/coda/cnode.h
@@ -0,0 +1,343 @@
+/*
+
+            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/cnode.h,v 1.10 1998/08/28 18:12:25 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1990 Carnegie-Mellon University
+ * 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: cnode.h,v $
+ * Revision 1.10  1998/08/28 18:12:25  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 1.9  1998/08/18 17:05:24  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.8  1998/08/18 16:31:49  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.7  98/02/24  22:22:53  rvb
+ * Fixes up mainly to flush iopen and friends
+ * 
+ * Revision 1.6  98/01/31  20:53:19  rvb
+ * First version that works on FreeBSD 2.2.5
+ * 
+ * Revision 1.5  98/01/23  11:53:51  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.4.2.5  98/01/23  11:21:14  rvb
+ * Sync with 2.2.5
+ * 
+ * Revision 1.4.2.4  98/01/22  13:03:38  rvb
+ * Had Breaken ls .
+ * 
+ * Revision 1.4.2.3  97/12/19  14:26:09  rvb
+ * session id
+ * 
+ * Revision 1.4.2.2  97/12/16  12:40:24  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.4.2.1  97/12/06  17:41:28  rvb
+ * Sync with peters coda.h
+ * 
+ * Revision 1.4  97/12/05  10:39:30  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.3.18.2  97/11/12  12:09:45  rvb
+ * reorg pass1
+ * 
+ * Revision 1.3.18.1  97/10/29  16:06:31  rvb
+ * Kill DYING
+ * 
+ * Revision 1.3  1996/12/12 22:11:03  bnoble
+ * Fixed the "downcall invokes venus operation" deadlock in all known cases. 
+ *  There may be more.
+ *
+ * Revision 1.2  1996/01/02 16:57:26  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ *
+ * Revision 1.1.2.1  1995/12/20 01:57:53  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 3.1.1.1  1995/03/04  19:08:23  bnoble
+ * Branch for NetBSD port revisions
+ *
+ * Revision 3.1  1995/03/04  19:08:23  bnoble
+ * Bump to major revision 3 to prepare for NetBSD port
+ *
+ * Revision 2.2  1994/12/06  13:39:18  dcs
+ * Add a flag value to indicate a cnode was orphaned, e.g. the venus
+ * that created it has exited. This will allow one to restart venus
+ * even though some process may be cd'd into /coda.
+ *
+ * Revision 2.1  94/07/21  16:25:33  satya
+ * Conversion to C++ 3.0; start of Coda Release 2.0
+ * 
+ * Revision 1.2.7.1  94/06/16  11:26:02  raiff
+ * Branch for release beta-16Jun1994_39118
+ * 
+ * Revision 1.2  92/10/27  17:58:41  lily
+ * merge kernel/latest and alpha/src/cfs
+ * 
+ * Revision 2.3  92/09/30  14:16:53  mja
+ * 	Picked up fixed #ifdef _KERNEL. Also...
+ * 
+ * 	Substituted rvb's history blurb so that we agree with Mach 2.5 sources.
+ * 	[91/02/09            jjk]
+ * 
+ * 	Added contributors blurb.
+ * 	[90/12/13            jjk]
+ * 
+ * Revision 2.2  90/07/05  11:27:24  mrt
+ * 	Created for the Coda File System.
+ * 	[90/05/23            dcs]
+ * 
+ * Revision 1.4  90/05/31  17:02:16  dcs
+ * Prepare for merge with facilities kernel.
+ * 
+ * 
+ * 
+ */
+
+#ifndef	_CNODE_H_
+#define	_CNODE_H_
+
+#include <sys/vnode.h>
+
+#ifdef	__FreeBSD__
+
+/* for the prototype of DELAY() */
+#include <machine/clock.h>
+
+#ifdef	__FreeBSD_version
+/* You would think that <sys/param.h> or something would include this */
+#include <sys/lock.h>
+
+MALLOC_DECLARE(M_CFS);
+
+#else
+
+/* yuck yuck yuck */
+#define vref(x) cvref(x)
+extern void cvref(struct vnode *vp);
+/* yuck yuck yuck */
+
+#endif
+#endif
+
+#if	defined(__NetBSD__) && defined(NetBSD1_3) && (NetBSD1_3 >= 7)
+#define	NEW_LOCKMGR(l, f, i) lockmgr(l, f, i)
+#define	VOP_X_LOCK(vn, fl) vn_lock(vn, fl)
+#define	VOP_X_UNLOCK(vn, fl) VOP_UNLOCK(vn, fl)
+
+#elif defined(__FreeBSD_version)
+#define	NEW_LOCKMGR(l, f, i) lockmgr(l, f, i, curproc)
+#define	VOP_X_LOCK(vn, fl) vn_lock(vn, fl, curproc)
+#define	VOP_X_UNLOCK(vn, fl) VOP_UNLOCK(vn, fl, curproc)
+
+/* NetBSD 1.3 & FreeBSD 2.2.x */
+#else
+#undef	NEW_LOCKMGR
+#define	VOP_X_LOCK(vn, fl) VOP_LOCK(vn)
+#define	VOP_X_UNLOCK(vn, fl) VOP_UNLOCK(vn)
+#endif
+
+/*
+ * tmp below since we need struct queue
+ */
+#include <cfs/cfsk.h>
+
+/*
+ * Cnode lookup stuff.
+ * NOTE: CFS_CACHESIZE must be a power of 2 for cfshash to work!
+ */
+#define CFS_CACHESIZE 512
+
+#define CFS_ALLOC(ptr, cast, size)                                        \
+do {                                                                      \
+    ptr = (cast)malloc((unsigned long) size, M_CFS, M_WAITOK);            \
+    if (ptr == 0) {                                                       \
+	panic("kernel malloc returns 0 at %s:%d\n", __FILE__, __LINE__);  \
+    }                                                                     \
+} while (0)
+
+#define CFS_FREE(ptr, size)  free((ptr), M_CFS)
+
+/*
+ * global cache state control
+ */
+extern int cfsnc_use;
+
+/*
+ * Used to select debugging statements throughout the cfs code.
+ */
+extern int cfsdebug;
+extern int cfsnc_debug;
+extern int cfs_printf_delay;
+extern int cfs_vnop_print_entry;
+extern int cfs_psdev_print_entry;
+extern int cfs_vfsop_print_entry;
+
+#define CFSDBGMSK(N)            (1 << N)
+#define CFSDEBUG(N, STMT)       { if (cfsdebug & CFSDBGMSK(N)) { STMT } }
+#define myprintf(args)          \
+do {                            \
+    if (cfs_printf_delay)       \
+	DELAY(cfs_printf_delay);\
+    printf args ;               \
+} while (0)
+
+struct cnode {
+    struct vnode	*c_vnode;
+    u_short		 c_flags;	/* flags (see below) */
+    ViceFid		 c_fid;		/* file handle */
+#ifdef	NEW_LOCKMGR
+    struct lock		 c_lock;	/* new lock protocol */
+#endif
+    struct vnode	*c_ovp;		/* open vnode pointer */
+    u_short		 c_ocount;	/* count of openers */
+    u_short		 c_owrite;	/* count of open for write */
+    struct vattr	 c_vattr; 	/* attributes */
+    char		*c_symlink;	/* pointer to symbolic link */
+    u_short		 c_symlen;	/* length of symbolic link */
+    dev_t		 c_device;	/* associated vnode device */
+    ino_t		 c_inode;	/* associated vnode inode */
+    struct cnode	*c_next;	/* links if on NetBSD machine */
+};
+#define	VTOC(vp)	((struct cnode *)(vp)->v_data)
+#define	CTOV(cp)	((struct vnode *)((cp)->c_vnode))
+
+/* flags */
+#define C_VATTR		0x01	/* Validity of vattr in the cnode */
+#define C_SYMLINK	0x02	/* Validity of symlink pointer in the Code */
+#define C_WANTED	0x08	/* Set if lock wanted */
+#define C_LOCKED	0x10	/* Set if lock held */
+#define C_UNMOUNTING	0X20	/* Set if unmounting */
+#define C_PURGING	0x40	/* Set if purging a fid */
+
+#define VALID_VATTR(cp)		((cp->c_flags) & C_VATTR)
+#define VALID_SYMLINK(cp)	((cp->c_flags) & C_SYMLINK)
+#define IS_UNMOUNTING(cp)	((cp)->c_flags & C_UNMOUNTING)
+
+struct vcomm {
+	u_long		vc_seq;
+	struct selinfo	vc_selproc;
+	struct queue	vc_requests;
+	struct queue	vc_replys;
+};
+
+#define	VC_OPEN(vcp)	    ((vcp)->vc_requests.forw != NULL)
+#define MARK_VC_CLOSED(vcp) (vcp)->vc_requests.forw = NULL;
+#define MARK_VC_OPEN(vcp)    /* MT */
+
+struct cfs_clstat {
+	int	ncalls;			/* client requests */
+	int	nbadcalls;		/* upcall failures */
+	int	reqs[CFS_NCALLS];	/* count of each request */
+};
+extern struct cfs_clstat cfs_clstat;
+
+/*
+ * CFS structure to hold mount/file system information
+ */
+struct cfs_mntinfo {
+    struct vnode	*mi_rootvp;
+    struct mount	*mi_vfsp;
+    struct vcomm	 mi_vcomm;
+};
+extern struct cfs_mntinfo cfs_mnttbl[]; /* indexed by minor device number */
+
+/*
+ * vfs pointer to mount info
+ */
+#define vftomi(vfsp)    ((struct cfs_mntinfo *)(vfsp->mnt_data))
+#define	CFS_MOUNTED(vfsp)   (vftomi((vfsp)) != (struct cfs_mntinfo *)0)
+
+/*
+ * vnode pointer to mount info
+ */
+#define vtomi(vp)       ((struct cfs_mntinfo *)(vp->v_mount->mnt_data))
+
+/*
+ * Used for identifying usage of "Control" object
+ */
+extern struct vnode *cfs_ctlvp;
+#define	IS_CTL_VP(vp)		((vp) == cfs_ctlvp)
+#define	IS_CTL_NAME(vp, name, l)((l == CFS_CONTROLLEN) \
+ 				 && ((vp) == vtomi((vp))->mi_rootvp)    \
+				 && strncmp(name, CFS_CONTROL, l) == 0)
+
+/* 
+ * An enum to tell us whether something that will remove a reference
+ * to a cnode was a downcall or not
+ */
+enum dc_status {
+    IS_DOWNCALL = 6,
+    NOT_DOWNCALL = 7
+};
+
+/* cfs_psdev.h */
+int cfscall(struct cfs_mntinfo *mntinfo, int inSize, int *outSize, caddr_t buffer);
+
+/* cfs_subr.h */
+int  handleDownCall(int opcode, union outputArgs *out);
+void cfs_unmounting(struct mount *whoIam);
+int  cfs_vmflush(struct cnode *cp);
+
+/* cfs_vnodeops.h */
+struct cnode *makecfsnode(ViceFid *fid, struct mount *vfsp, short type);
+int cfs_vnodeopstats_init(void);
+
+/* cfs_vfsops.h */
+struct mount *devtomp(dev_t dev);
+
+#if	!(defined NetBSD1_3) && !defined(__FreeBSD_version)
+#define __RCSID(x) static char *rcsid = x
+#endif
+
+/* sigh */
+#define CFS_RDWR ((u_long) 31)
+
+#endif	/* _CNODE_H_ */
+
diff --git a/sys/fs/coda/coda.h b/sys/fs/coda/coda.h
new file mode 100644
index 0000000..78de1fd
--- /dev/null
+++ b/sys/fs/coda/coda.h
@@ -0,0 +1,677 @@
+/*
+
+            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/coda.h,v 1.10 1998/08/28 18:12:26 rvb Exp $ */
+
+/*
+ *
+ * Based on cfs.h from Mach, but revamped for increased simplicity.
+ * Linux modifications by Peter Braam, Aug 1996
+ */
+
+#ifndef _CFS_HEADER_
+#define _CFS_HEADER_
+
+
+
+/* Catch new _KERNEL defn for NetBSD */
+#ifdef __NetBSD__
+#include <sys/types.h>
+#endif 
+
+#if defined(__linux__) || defined(__CYGWIN32__)
+#define cdev_t u_quad_t
+#if !defined(_UQUAD_T_) && (!defined(__GLIBC__) || __GLIBC__ < 2)
+#define _UQUAD_T_ 1
+typedef unsigned long long u_quad_t;
+#endif 
+#else
+#define cdev_t dev_t
+#endif
+
+#ifdef __CYGWIN32__
+typedef unsigned char u_int8_t;
+struct timespec {
+        time_t  tv_sec;         /* seconds */
+        long    tv_nsec;        /* nanoseconds */
+};
+#endif
+
+
+/*
+ * Cfs constants
+ */
+#define CFS_MAXNAMLEN   255
+#define CFS_MAXPATHLEN  1024
+#define CFS_MAXSYMLINK  10
+
+/* these are Coda's version of O_RDONLY etc combinations
+ * to deal with VFS open modes
+ */
+#define	C_O_READ	0x001
+#define	C_O_WRITE       0x002
+#define C_O_TRUNC       0x010
+#define C_O_EXCL	0x100
+
+/* these are to find mode bits in Venus */ 
+#define C_M_READ  00400
+#define C_M_WRITE 00200
+
+/* for access Venus will use */
+#define C_A_R_OK    4               /* Test for read permission.  */
+#define C_A_W_OK    2               /* Test for write permission.  */
+#define C_A_X_OK    1               /* Test for execute permission.  */
+#define C_A_F_OK    0               /* Test for existence.  */
+
+
+
+#ifndef _VENUS_DIRENT_T_
+#define _VENUS_DIRENT_T_ 1
+struct venus_dirent {
+        unsigned long	d_fileno;		/* file number of entry */
+        unsigned short	d_reclen;		/* length of this record */
+        char 		d_type;			/* file type, see below */
+        char		d_namlen;		/* length of string in d_name */
+        char		d_name[CFS_MAXNAMLEN + 1];/* name must be no longer than this */
+};
+#undef DIRSIZ
+#define DIRSIZ(dp)      ((sizeof (struct venus_dirent) - (CFS_MAXNAMLEN+1)) + \
+                         (((dp)->d_namlen+1 + 3) &~ 3))
+
+/*
+ * File types
+ */
+#define	CDT_UNKNOWN	 0
+#define	CDT_FIFO		 1
+#define	CDT_CHR		 2
+#define	CDT_DIR		 4
+#define	CDT_BLK		 6
+#define	CDT_REG		 8
+#define	CDT_LNK		10
+#define	CDT_SOCK		12
+#define	CDT_WHT		14
+
+/*
+ * Convert between stat structure types and directory types.
+ */
+#define	IFTOCDT(mode)	(((mode) & 0170000) >> 12)
+#define	CDTTOIF(dirtype)	((dirtype) << 12)
+
+#endif
+
+#ifndef	_FID_T_
+#define _FID_T_	1
+typedef u_long VolumeId;
+typedef u_long VnodeId;
+typedef u_long Unique_t;
+typedef u_long FileVersion;
+#endif 
+
+#ifndef	_VICEFID_T_
+#define _VICEFID_T_	1
+typedef struct ViceFid {
+    VolumeId Volume;
+    VnodeId Vnode;
+    Unique_t Unique;
+} ViceFid;
+#endif	/* VICEFID */
+
+#ifdef	__linux__
+static inline ino_t coda_f2i(struct ViceFid *fid)
+{
+      if ( fid ) {
+              return (fid->Unique + (fid->Vnode << 10) + (fid->Volume << 20));
+      } else { 
+              return 0;
+      }
+}
+#endif
+
+#ifndef _VUID_T_
+#define _VUID_T_
+typedef u_long vuid_t;
+typedef u_long vgid_t;
+#endif /*_VUID_T_ */
+
+#ifndef _CODACRED_T_
+#define _CODACRED_T_
+struct coda_cred {
+    vuid_t cr_uid, cr_euid, cr_suid, cr_fsuid; /* Real, efftve, set, fs uid*/
+#if	defined(__NetBSD__) || defined(__FreeBSD__)
+    vgid_t cr_groupid, cr_egid, cr_sgid, cr_fsgid; /* same for groups */
+#else
+    vgid_t cr_gid,     cr_egid, cr_sgid, cr_fsgid; /* same for groups */
+#endif
+};
+#endif 
+
+#ifndef _VENUS_VATTR_T_
+#define _VENUS_VATTR_T_
+/*
+ * Vnode types.  VNON means no type.
+ */
+enum coda_vtype	{ C_VNON, C_VREG, C_VDIR, C_VBLK, C_VCHR, C_VLNK, C_VSOCK, C_VFIFO, C_VBAD };
+
+struct coda_vattr {
+	enum coda_vtype	va_type;	/* vnode type (for create) */
+	u_short		va_mode;	/* files access mode and type */
+	short		va_nlink;	/* number of references to file */
+	vuid_t		va_uid;		/* owner user id */
+	vgid_t		va_gid;		/* owner group id */
+	long		va_fileid;	/* file id */
+	u_quad_t	va_size;	/* file size in bytes */
+	long		va_blocksize;	/* blocksize preferred for i/o */
+	struct timespec	va_atime;	/* time of last access */
+	struct timespec	va_mtime;	/* time of last modification */
+	struct timespec	va_ctime;	/* time file changed */
+	u_long		va_gen;		/* generation number of file */
+	u_long		va_flags;	/* flags defined for file */
+	cdev_t	        va_rdev;	/* device special file represents */
+	u_quad_t	va_bytes;	/* bytes of disk space held by file */
+	u_quad_t	va_filerev;	/* file modification number */
+};
+
+#endif 
+
+/*
+ * Kernel <--> Venus communications.
+ */
+
+#define CFS_ROOT	((u_long) 2)
+#define CFS_SYNC	((u_long) 3)
+#define CFS_OPEN	((u_long) 4)
+#define CFS_CLOSE	((u_long) 5)
+#define CFS_IOCTL	((u_long) 6)
+#define CFS_GETATTR	((u_long) 7)
+#define CFS_SETATTR	((u_long) 8)
+#define CFS_ACCESS	((u_long) 9)
+#define CFS_LOOKUP	((u_long) 10)
+#define CFS_CREATE	((u_long) 11)
+#define CFS_REMOVE	((u_long) 12)
+#define CFS_LINK	((u_long) 13)
+#define CFS_RENAME	((u_long) 14)
+#define CFS_MKDIR	((u_long) 15)
+#define CFS_RMDIR	((u_long) 16)
+#define CFS_READDIR	((u_long) 17)
+#define CFS_SYMLINK	((u_long) 18)
+#define CFS_READLINK	((u_long) 19)
+#define CFS_FSYNC	((u_long) 20)
+#define CFS_INACTIVE	((u_long) 21)
+#define CFS_VGET	((u_long) 22)
+#define CFS_SIGNAL	((u_long) 23)
+#define CFS_REPLACE	((u_long) 24)
+#define CFS_FLUSH       ((u_long) 25)
+#define CFS_PURGEUSER   ((u_long) 26)
+#define CFS_ZAPFILE     ((u_long) 27)
+#define CFS_ZAPDIR      ((u_long) 28)
+#define CFS_ZAPVNODE    ((u_long) 29)
+#define CFS_PURGEFID    ((u_long) 30)
+#define CFS_NCALLS 31
+
+#define DOWNCALL(opcode) (opcode >= CFS_REPLACE && opcode <= CFS_PURGEFID)
+
+#define VC_MAXDATASIZE	    8192
+#define VC_MAXMSGSIZE      sizeof(union inputArgs)+sizeof(union outputArgs) +\
+                            VC_MAXDATASIZE  
+
+
+
+/*
+ *        Venus <-> Coda  RPC arguments
+ */
+struct cfs_in_hdr {
+    unsigned long opcode;
+    unsigned long unique;	    /* Keep multiple outstanding msgs distinct */
+    u_short pid;		    /* Common to all */
+    u_short pgid;		    /* Common to all */
+    u_short sid;                    /* Common to all */
+    struct coda_cred cred;	    /* Common to all */
+};
+
+/* Really important that opcode and unique are 1st two fields! */
+struct cfs_out_hdr {
+    unsigned long opcode;
+    unsigned long unique;	
+    unsigned long result;
+};
+
+/* cfs_root: NO_IN */
+struct cfs_root_out {
+    struct cfs_out_hdr oh;
+    ViceFid VFid;
+};
+
+struct cfs_root_in {
+    struct cfs_in_hdr in;
+};
+
+/* cfs_sync: */
+/* Nothing needed for cfs_sync */
+
+/* cfs_open: */
+struct cfs_open_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int	flags;
+};
+
+struct cfs_open_out {
+    struct cfs_out_hdr oh;
+    cdev_t	dev;
+    ino_t	inode;
+};
+
+
+/* cfs_close: */
+struct cfs_close_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int	flags;
+};
+
+struct cfs_close_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_ioctl: */
+struct cfs_ioctl_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+    int	cmd;
+    int	len;
+    int	rwflag;
+    char *data;			/* Place holder for data. */
+};
+
+struct cfs_ioctl_out {
+    struct cfs_out_hdr oh;
+    int	len;
+    caddr_t	data;		/* Place holder for data. */
+};
+
+
+/* cfs_getattr: */
+struct cfs_getattr_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+};
+
+struct cfs_getattr_out {
+    struct cfs_out_hdr oh;
+    struct coda_vattr attr;
+};
+
+
+/* cfs_setattr: NO_OUT */
+struct cfs_setattr_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+    struct coda_vattr attr;
+};
+
+struct cfs_setattr_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_access: NO_OUT */
+struct cfs_access_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int	flags;
+};
+
+struct cfs_access_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_lookup: */
+struct  cfs_lookup_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int         name;		/* Place holder for data. */
+};
+
+struct cfs_lookup_out {
+    struct cfs_out_hdr oh;
+    ViceFid VFid;
+    int	vtype;
+};
+
+
+/* cfs_create: */
+struct cfs_create_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+    struct coda_vattr attr;
+    int excl;
+    int mode;
+    int 	name;		/* Place holder for data. */
+};
+
+struct cfs_create_out {
+    struct cfs_out_hdr oh;
+    ViceFid VFid;
+    struct coda_vattr attr;
+};
+
+
+/* cfs_remove: NO_OUT */
+struct cfs_remove_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int name;		/* Place holder for data. */
+};
+
+struct cfs_remove_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_link: NO_OUT */
+struct cfs_link_in {
+    struct cfs_in_hdr ih;
+    ViceFid sourceFid;          /* cnode to link *to* */
+    ViceFid destFid;            /* Directory in which to place link */
+    int tname;		/* Place holder for data. */
+};
+
+struct cfs_link_out {
+    struct cfs_out_hdr out;
+};
+
+
+/* cfs_rename: NO_OUT */
+struct cfs_rename_in {
+    struct cfs_in_hdr ih;
+    ViceFid	sourceFid;
+    int 	srcname;
+    ViceFid destFid;
+    int 	destname;
+};
+
+struct cfs_rename_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_mkdir: */
+struct cfs_mkdir_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    struct coda_vattr attr;
+    int	   name;		/* Place holder for data. */
+};
+
+struct cfs_mkdir_out {
+    struct cfs_out_hdr oh;
+    ViceFid VFid;
+    struct coda_vattr attr;
+};
+
+
+/* cfs_rmdir: NO_OUT */
+struct cfs_rmdir_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int name;		/* Place holder for data. */
+};
+
+struct cfs_rmdir_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_readdir: */
+struct cfs_readdir_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int	count;
+    int	offset;
+};
+
+struct cfs_readdir_out {
+    struct cfs_out_hdr oh;
+    int	size;
+    caddr_t	data;		/* Place holder for data. */
+};
+
+/* cfs_symlink: NO_OUT */
+struct cfs_symlink_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;          /* Directory to put symlink in */
+    int srcname;
+    struct coda_vattr attr;
+    int tname;
+};
+
+struct cfs_symlink_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_readlink: */
+struct cfs_readlink_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+};
+
+struct cfs_readlink_out {
+    struct cfs_out_hdr oh;
+    int	count;
+    caddr_t	data;		/* Place holder for data. */
+};
+
+
+/* cfs_fsync: NO_OUT */
+struct cfs_fsync_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+};
+
+struct cfs_fsync_out {
+    struct cfs_out_hdr out;
+};
+
+/* cfs_inactive: NO_OUT */
+struct cfs_inactive_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+};
+
+/* cfs_vget: */
+struct cfs_vget_in {
+    struct cfs_in_hdr ih;
+    ViceFid VFid;
+};
+
+struct cfs_vget_out {
+    struct cfs_out_hdr oh;
+    ViceFid VFid;
+    int	vtype;
+};
+
+
+/* CFS_SIGNAL is out-of-band, doesn't need data. */
+/* CFS_INVALIDATE is a venus->kernel call */
+/* CFS_FLUSH is a venus->kernel call */
+
+/* cfs_purgeuser: */
+/* CFS_PURGEUSER is a venus->kernel call */
+struct cfs_purgeuser_out {
+    struct cfs_out_hdr oh;
+    struct coda_cred cred;
+};
+
+/* cfs_zapfile: */
+/* CFS_ZAPFILE is a venus->kernel call */
+struct cfs_zapfile_out {  
+    struct cfs_out_hdr oh;
+    ViceFid CodaFid;
+};
+
+/* cfs_zapdir: */
+/* CFS_ZAPDIR is a venus->kernel call */	
+struct cfs_zapdir_out {	  
+    struct cfs_out_hdr oh;
+    ViceFid CodaFid;
+};
+
+/* cfs_zapnode: */
+/* CFS_ZAPVNODE is a venus->kernel call */	
+struct cfs_zapvnode_out { 
+    struct cfs_out_hdr oh;
+    struct coda_cred cred;
+    ViceFid VFid;
+};
+
+/* cfs_purgefid: */
+/* CFS_PURGEFID is a venus->kernel call */	
+struct cfs_purgefid_out { 
+    struct cfs_out_hdr oh;
+    ViceFid CodaFid;
+};
+
+/* cfs_rdwr: */
+struct cfs_rdwr_in {
+    struct cfs_in_hdr ih;
+    ViceFid	VFid;
+    int	rwflag;
+    int	count;
+    int	offset;
+    int	ioflag;
+    caddr_t	data;		/* Place holder for data. */	
+};
+
+struct cfs_rdwr_out {
+    struct cfs_out_hdr oh;
+    int	rwflag;
+    int	count;
+    caddr_t	data;	/* Place holder for data. */
+};
+
+
+/* cfs_replace: */
+/* CFS_REPLACE is a venus->kernel call */	
+struct cfs_replace_out { /* cfs_replace is a venus->kernel call */
+    struct cfs_out_hdr oh;
+    ViceFid NewFid;
+    ViceFid OldFid;
+};
+
+/* 
+ * Occasionally, don't cache the fid returned by CFS_LOOKUP. For instance, if
+ * the fid is inconsistent. This case is handled by setting the top bit of the
+ * return result parameter.
+ */
+#define CFS_NOCACHE          0x80000000
+
+union inputArgs {
+    struct cfs_in_hdr ih;		/* NB: every struct below begins with an ih */
+    struct cfs_open_in cfs_open;
+    struct cfs_close_in cfs_close;
+    struct cfs_ioctl_in cfs_ioctl;
+    struct cfs_getattr_in cfs_getattr;
+    struct cfs_setattr_in cfs_setattr;
+    struct cfs_access_in cfs_access;
+    struct cfs_lookup_in cfs_lookup;
+    struct cfs_create_in cfs_create;
+    struct cfs_remove_in cfs_remove;
+    struct cfs_link_in cfs_link;
+    struct cfs_rename_in cfs_rename;
+    struct cfs_mkdir_in cfs_mkdir;
+    struct cfs_rmdir_in cfs_rmdir;
+    struct cfs_readdir_in cfs_readdir;
+    struct cfs_symlink_in cfs_symlink;
+    struct cfs_readlink_in cfs_readlink;
+    struct cfs_fsync_in cfs_fsync;
+    struct cfs_inactive_in cfs_inactive;
+    struct cfs_vget_in cfs_vget;
+    struct cfs_rdwr_in cfs_rdwr;
+};
+
+union outputArgs {
+    struct cfs_out_hdr oh;		/* NB: every struct below begins with an oh */
+    struct cfs_root_out cfs_root;
+    struct cfs_open_out cfs_open;
+    struct cfs_ioctl_out cfs_ioctl;
+    struct cfs_getattr_out cfs_getattr;
+    struct cfs_lookup_out cfs_lookup;
+    struct cfs_create_out cfs_create;
+    struct cfs_mkdir_out cfs_mkdir;
+    struct cfs_readdir_out cfs_readdir;
+    struct cfs_readlink_out cfs_readlink;
+    struct cfs_vget_out cfs_vget;
+    struct cfs_purgeuser_out cfs_purgeuser;
+    struct cfs_zapfile_out cfs_zapfile;
+    struct cfs_zapdir_out cfs_zapdir;
+    struct cfs_zapvnode_out cfs_zapvnode;
+    struct cfs_purgefid_out cfs_purgefid;
+    struct cfs_rdwr_out cfs_rdwr;
+    struct cfs_replace_out cfs_replace;
+};    
+
+union cfs_downcalls {
+    /* CFS_INVALIDATE is a venus->kernel call */
+    /* CFS_FLUSH is a venus->kernel call */
+    struct cfs_purgeuser_out purgeuser;
+    struct cfs_zapfile_out zapfile;
+    struct cfs_zapdir_out zapdir;
+    struct cfs_zapvnode_out zapvnode;
+    struct cfs_purgefid_out purgefid;
+    struct cfs_replace_out replace;
+};
+
+
+/*
+ * Used for identifying usage of "Control" and pioctls
+ */
+
+#define PIOCPARM_MASK 0x0000ffff
+struct ViceIoctl {
+        caddr_t in, out;        /* Data to be transferred in, or out */
+        short in_size;          /* Size of input buffer <= 2K */
+        short out_size;         /* Maximum size of output buffer, <= 2K */
+};
+
+struct PioctlData {
+        const char *path;
+        int follow;
+        struct ViceIoctl vi;
+};
+
+#define	CFS_CONTROL		".CONTROL"
+#define CFS_CONTROLLEN           8
+#define	CTL_VOL			-1
+#define	CTL_VNO			-1
+#define	CTL_UNI			-1
+#define CTL_INO                 -1
+#define	CTL_FILE		"/coda/.CONTROL"
+
+
+#define	IS_CTL_FID(fidp)	((fidp)->Volume == CTL_VOL &&\
+				 (fidp)->Vnode == CTL_VNO &&\
+				 (fidp)->Unique == CTL_UNI)
+#endif 
+
diff --git a/sys/fs/coda/coda_fbsd.c b/sys/fs/coda/coda_fbsd.c
new file mode 100644
index 0000000..23d55cc
--- /dev/null
+++ b/sys/fs/coda/coda_fbsd.c
@@ -0,0 +1,241 @@
+/*
+
+            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_fbsd.c,v 1.6 1998/08/28 18:12:11 rvb Exp $ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/proc.h>
+#include <sys/fcntl.h>
+#include <sys/ucred.h>
+#include <sys/malloc.h>
+#include <vm/vm.h>
+#include <vm/vnode_pager.h>
+
+#ifdef DEVFS
+#include <sys/devfsext.h>
+#endif
+#include <sys/conf.h>
+
+#include <sys/vnode.h>
+#include <cfs/coda.h>
+#include <cfs/cnode.h>
+#include <cfs/cfs_vnodeops.h>
+
+/* 
+   From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
+   Subject: Re: New 3.0 SNAPshot CDROM about ready for production.. 
+   To: "Robert.V.Baron" <rvb@GLUCK.CODA.CS.CMU.EDU>
+   Date: Fri, 20 Feb 1998 15:57:01 -0800
+
+   > Also I need a character device major number. (and might want to reserve
+   > a block of 10 syscalls.)
+
+   Just one char device number?  No block devices?  Very well, cdev 93 is yours!
+*/
+
+#define VC_DEV_NO      93
+
+#ifdef	__FreeBSD_version
+/* Type of device methods. */
+extern d_open_t  vc_nb_open;
+extern d_close_t vc_nb_close;
+extern d_read_t  vc_nb_read;
+extern d_write_t vc_nb_write;
+extern d_ioctl_t vc_nb_ioctl;
+extern d_poll_t	 vc_nb_poll;
+
+static struct cdevsw vccdevsw =
+{ 
+  vc_nb_open,      vc_nb_close,    vc_nb_read,        vc_nb_write,	/*93*/
+  vc_nb_ioctl,     nostop,         nullreset,         nodevtotty,
+  vc_nb_poll,      nommap,         NULL,              "Coda", NULL, -1 };
+#else
+/* Type of device methods. */
+#define D_OPEN_T    d_open_t
+#define D_CLOSE_T   d_close_t
+#define D_RDWR_T    d_rdwr_t
+#define D_READ_T    d_read_t
+#define D_WRITE_T   d_write_t
+#define D_IOCTL_T   d_ioctl_t
+#define D_SELECT_T  d_select_t
+
+/* rvb why */
+D_OPEN_T    vc_nb_open;		/* was is defined in cfs_FreeBSD.h */
+D_CLOSE_T   vc_nb_close;
+D_READ_T    vc_nb_read;
+D_WRITE_T   vc_nb_write;
+D_IOCTL_T   vc_nb_ioctl;
+D_SELECT_T  vc_nb_select;
+
+static struct cdevsw vccdevsw =
+{ 
+  vc_nb_open,      vc_nb_close,    vc_nb_read,        vc_nb_write,
+  vc_nb_ioctl,     nostop,         nullreset,         nodevtotty,
+  vc_nb_select,    nommap,         NULL,              "Coda", NULL, -1 };
+
+PSEUDO_SET(vcattach, vc);
+#endif
+
+void vcattach __P((void));
+static dev_t vccdev;
+
+int     vcdebug = 1;
+#define VCDEBUG if (vcdebug) printf
+
+void
+vcattach(void)
+{
+  /*
+   * In case we are an LKM, set up device switch.
+   */
+  if (0 == (vccdev = makedev(VC_DEV_NO, 0)))
+    VCDEBUG("makedev returned null\n");
+  else 
+    VCDEBUG("makedev OK.\n");
+    
+  cdevsw_add(&vccdev, &vccdevsw, NULL);
+  VCDEBUG("cfs: vccdevsw entry installed at %d.\n", major(vccdev));
+}
+
+void
+cvref(vp)
+	struct vnode *vp;
+{
+	if (vp->v_usecount <= 0)
+		panic("vref used where vget required");
+
+	vp->v_usecount++;
+}
+
+
+#ifdef	__FreeBSD_version
+static vc_devsw_installed = 0;
+
+static void 	vc_drvinit __P((void *unused));
+static void
+vc_drvinit(void *unused)
+{
+	dev_t dev;
+
+	if( ! vc_devsw_installed ) {
+		dev = makedev(VC_DEV_NO, 0);
+		cdevsw_add(&dev,&vccdevsw, NULL);
+		vc_devsw_installed = 1;
+    	}
+}
+
+int
+cfs_fbsd_getpages(v)
+	void *v;
+{
+    struct vop_getpages_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    int ret = 0;
+
+#if	1
+	/*??? a_offset */
+	ret = vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
+		ap->a_reqpage);
+	return ret;
+#else
+  {
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    struct vnode *cfvp = cp->c_ovp;
+    int opened_internally = 0;
+    struct ucred *cred = (struct ucred *) 0;
+    struct proc *p = curproc;
+    int error = 0;
+	
+    if (IS_CTL_VP(vp)) {
+	return(EINVAL);
+    }
+
+    /* Redirect the request to UFS. */
+
+    if (cfvp == NULL) {
+	opened_internally = 1;
+
+	error = VOP_OPEN(vp, FREAD,  cred, p);
+printf("cfs_getp: Internally Opening %p\n", vp);
+
+	if (error) {
+	    printf("cfs_getpage: VOP_OPEN on container failed %d\n", error);
+		return (error);
+	}
+	if (vp->v_type == VREG) {
+	    error = vfs_object_create(vp, p, cred, 1);
+	    if (error != 0) {
+		printf("cfs_getpage: vfs_object_create() returns %d\n", error);
+		vput(vp);
+		return(error);
+	    }
+	}
+
+	cfvp = cp->c_ovp;
+    } else {
+printf("cfs_getp: has container %p\n", cfvp);
+    }
+
+printf("cfs_fbsd_getpages: using container ");
+/*
+    error = vnode_pager_generic_getpages(cfvp, ap->a_m, ap->a_count,
+	ap->a_reqpage);
+*/
+    error = VOP_GETPAGES(cfvp, ap->a_m, ap->a_count,
+	ap->a_reqpage, ap->a_offset);
+printf("error = %d\n", error);
+
+    /* Do an internal close if necessary. */
+    if (opened_internally) {
+	(void)VOP_CLOSE(vp, FREAD, cred, p);
+    }
+
+    return(error);
+  }
+#endif
+}
+
+int
+cfs_fbsd_putpages(v)
+	void *v;
+{
+	struct vop_putpages_args *ap = v;
+
+	/*??? a_offset */
+	return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
+		ap->a_sync, ap->a_rtvals);
+}
+
+
+SYSINIT(vccdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+VC_DEV_NO,vc_drvinit,NULL)
+#endif
diff --git a/sys/fs/coda/coda_io.h b/sys/fs/coda/coda_io.h
new file mode 100644
index 0000000..e515594
--- /dev/null
+++ b/sys/fs/coda/coda_io.h
@@ -0,0 +1,125 @@
+/*
+
+            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/cfsio.h,v 1.5 1998/08/18 17:05:23 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1990 Carnegie-Mellon University
+ * 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: cfsio.h,v $
+ * Revision 1.5  1998/08/18 17:05:23  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.4  1998/08/18 16:31:47  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.3  98/01/23  11:53:49  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.2.38.1  97/12/16  12:40:22  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.2  96/01/02  16:57:15  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ * 
+ * Revision 1.1.2.1  1995/12/20 01:57:42  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 3.1.1.1  1995/03/04  19:08:20  bnoble
+ * Branch for NetBSD port revisions
+ *
+ * Revision 3.1  1995/03/04  19:08:20  bnoble
+ * Bump to major revision 3 to prepare for NetBSD port
+ *
+ * Revision 2.1  1994/07/21  16:25:25  satya
+ * Conversion to C++ 3.0; start of Coda Release 2.0
+ *
+ * Revision 1.3  94/06/14  16:53:47  dcs
+ * Added support for ODY-like mounting in the kernel (SETS)
+ * 
+ * Revision 1.3  94/06/14  16:48:03  dcs
+ * Added support for ODY-like mounting in the kernel (SETS)
+ * 
+ * Revision 1.2  92/10/27  17:58:28  lily
+ * merge kernel/latest and alpha/src/cfs
+ * 
+ * Revision 1.1  92/04/03  17:35:34  satya
+ * Initial revision
+ * 
+ * Revision 1.5  91/02/09  12:53:26  jjk
+ * Substituted rvb's history blurb so that we agree with Mach 2.5 sources.
+ * 
+ * Revision 2.2.1.1  91/01/06  22:08:22  rvb
+ * 	Created for the Coda File System.
+ * 	[90/05/23            dcs]
+ * 
+ * Revision 1.3  90/07/19  10:23:05  dcs
+ * Added ; to cfs_resize definition for port to 386.
+ * 
+ * Revision 1.2  90/05/31  17:02:09  dcs
+ * Prepare for merge with facilities kernel.
+ * 
+ * 
+ * 
+ */
+
+#ifndef _CFSIO_H_
+#define _CFSIO_H_
+
+/* Define ioctl commands for vcioctl, /dev/cfs */
+
+#ifdef __STDC__
+#define CFSRESIZE    _IOW('c', 1, struct cfs_resize )  /* Resize CFS NameCache */
+#define CFSSTATS      _IO('c', 2)                      /* Collect stats */
+#define CFSPRINT      _IO('c', 3)                      /* Print Cache */
+#define CFSTEST       _IO('c', 4)                      /* Print Cache */
+#else /* sys/ioctl.h puts the quotes on */
+#define CFSRESIZE    _IOW(c, 1, struct cfs_resize )  /* Resize CFS NameCache */
+#define CFSSTATS      _IO(c, 2)                      /* Collect stats */
+#define CFSPRINT      _IO(c, 3)                      /* Print Cache */
+
+#define CFSTEST       _IO(c, 4)                      /* Print Cache */
+#endif __STDC__
+
+
+struct cfs_resize { int hashsize, heapsize; };
+
+#endif !_CFSIO_H_
diff --git a/sys/fs/coda/coda_kernel.h b/sys/fs/coda/coda_kernel.h
new file mode 100644
index 0000000..5bdcd41
--- /dev/null
+++ b/sys/fs/coda/coda_kernel.h
@@ -0,0 +1,64 @@
+/*
+
+            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/cfsk.h,v 1.9 1998/08/18 17:05:23 rvb Exp $ */
+
+/* Macros to manipulate the queue */
+#ifndef INIT_QUEUE
+struct queue {
+    struct queue *forw, *back;
+};
+
+#define INIT_QUEUE(head)                     \
+do {                                         \
+    (head).forw = (struct queue *)&(head);   \
+    (head).back = (struct queue *)&(head);   \
+} while (0)
+
+#define GETNEXT(head) (head).forw
+
+#define EMPTY(head) ((head).forw == &(head))
+
+#define EOQ(el, head) ((struct queue *)(el) == (struct queue *)&(head))
+		   
+#define INSQUE(el, head)                             \
+do {                                                 \
+	(el).forw = ((head).back)->forw;             \
+	(el).back = (head).back;                     \
+	((head).back)->forw = (struct queue *)&(el); \
+	(head).back = (struct queue *)&(el);         \
+} while (0)
+
+#define REMQUE(el)                         \
+do {                                       \
+	((el).forw)->back = (el).back;     \
+	(el).back->forw = (el).forw;       \
+}  while (0)
+
+#endif INIT_QUEUE
diff --git a/sys/fs/coda/coda_namecache.c b/sys/fs/coda/coda_namecache.c
new file mode 100644
index 0000000..6c80a26
--- /dev/null
+++ b/sys/fs/coda/coda_namecache.c
@@ -0,0 +1,898 @@
+/*
+
+            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_namecache.c,v 1.11 1998/08/28 18:12:16 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1990 Carnegie-Mellon University
+ * 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_namecache.c,v $
+ * Revision 1.11  1998/08/28 18:12:16  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 17:05:14  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.9  1998/08/18 16:31:39  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.8  98/01/31  20:53:10  rvb
+ * First version that works on FreeBSD 2.2.5
+ * 
+ * Revision 1.7  98/01/23  11:53:39  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.6.2.4  98/01/23  11:21:02  rvb
+ * Sync with 2.2.5
+ * 
+ * Revision 1.6.2.3  97/12/16  12:40:03  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.6.2.2  97/12/09  16:07:10  rvb
+ * Sync with vfs/include/coda.h
+ * 
+ * Revision 1.6.2.1  97/12/06  17:41:18  rvb
+ * Sync with peters coda.h
+ * 
+ * Revision 1.6  97/12/05  10:39:13  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.5.4.7  97/11/25  08:08:43  rvb
+ * cfs_venus ... done; until cred/vattr change
+ * 
+ * Revision 1.5.4.6  97/11/24  15:44:43  rvb
+ * Final cfs_venus.c w/o macros, but one locking bug
+ * 
+ * Revision 1.5.4.5  97/11/20  11:46:38  rvb
+ * Capture current cfs_venus
+ * 
+ * Revision 1.5.4.4  97/11/18  10:27:13  rvb
+ * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
+ * cfs_nb_foo and cfs_foo are joined
+ * 
+ * Revision 1.5.4.3  97/11/13  22:02:57  rvb
+ * pass2 cfs_NetBSD.h mt
+ * 
+ * Revision 1.5.4.2  97/11/12  12:09:35  rvb
+ * reorg pass1
+ * 
+ * Revision 1.5.4.1  97/10/28  23:10:12  rvb
+ * >64Meg; venus can be killed!
+ * 
+ * Revision 1.5  97/08/05  11:08:01  lily
+ * Removed cfsnc_replace, replaced it with a cfs_find, unhash, and
+ * rehash.  This fixes a cnode leak and a bug in which the fid is
+ * not actually replaced.  (cfs_namecache.c, cfsnc.h, cfs_subr.c)
+ * 
+ * Revision 1.4  96/12/12  22:10:57  bnoble
+ * Fixed the "downcall invokes venus operation" deadlock in all known cases.
+ * There may be more
+ * 
+ * Revision 1.3  1996/11/08 18:06:09  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 16:56:50  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ *
+ * Revision 1.1.2.1  1995/12/20 01:57:15  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 3.1.1.1  1995/03/04  19:07:57  bnoble
+ * Branch for NetBSD port revisions
+ *
+ * Revision 3.1  1995/03/04  19:07:56  bnoble
+ * Bump to major revision 3 to prepare for NetBSD port
+ *
+ * Revision 2.3  1994/10/14  09:57:54  dcs
+ * Made changes 'cause sun4s have braindead compilers
+ *
+ * Revision 2.2  94/08/28  19:37:35  luqi
+ * Add a new CFS_REPLACE call to allow venus to replace a ViceFid in the
+ * mini-cache. 
+ * 
+ * In "cfs.h":
+ * Add CFS_REPLACE decl.
+ * 
+ * In "cfs_namecache.c":
+ * Add routine cfsnc_replace.
+ * 
+ * In "cfs_subr.c":
+ * Add case-statement to process CFS_REPLACE.
+ * 
+ * In "cfsnc.h":
+ * Add decl for CFSNC_REPLACE.
+ * 
+ * 
+ * Revision 2.1  94/07/21  16:25:15  satya
+ * Conversion to C++ 3.0; start of Coda Release 2.0
+ *
+ * Revision 1.2  92/10/27  17:58:21  lily
+ * merge kernel/latest and alpha/src/cfs
+ * 
+ * Revision 2.3  92/09/30  14:16:20  mja
+ * 	call cfs_flush instead of calling inode_uncache_try directly 
+ * 	(from dcs). Also...
+ * 
+ * 	Substituted rvb's history blurb so that we agree with Mach 2.5 sources.
+ * 	[91/02/09            jjk]
+ * 
+ * 	Added contributors blurb.
+ * 	[90/12/13            jjk]
+ * 
+ * Revision 2.2  90/07/05  11:26:30  mrt
+ * 	Created for the Coda File System.
+ * 	[90/05/23            dcs]
+ * 
+ * Revision 1.3  90/05/31  17:01:24  dcs
+ * Prepare for merge with facilities kernel.
+ * 
+ * 
+ */
+
+/*
+ * This module contains the routines to implement the CFS name cache. The
+ * purpose of this cache is to reduce the cost of translating pathnames 
+ * into Vice FIDs. Each entry in the cache contains the name of the file,
+ * the vnode (FID) of the parent directory, and the cred structure of the
+ * user accessing the file.
+ *
+ * The first time a file is accessed, it is looked up by the local Venus
+ * which first insures that the user has access to the file. In addition
+ * we are guaranteed that Venus will invalidate any name cache entries in
+ * case the user no longer should be able to access the file. For these
+ * reasons we do not need to keep access list information as well as a
+ * cred structure for each entry.
+ *
+ * The table can be accessed through the routines cnc_init(), cnc_enter(),
+ * cnc_lookup(), cnc_rmfidcred(), cnc_rmfid(), cnc_rmcred(), and cnc_purge().
+ * There are several other routines which aid in the implementation of the
+ * hash table.
+ */
+
+/*
+ * NOTES: rvb@cs
+ * 1.	The name cache holds a reference to every vnode in it.  Hence files can not be
+ *	 closed or made inactive until they are released.
+ * 2.	cfsnc_name(cp) was added to get a name for a cnode pointer for debugging.
+ * 3.	cfsnc_find() has debug code to detect when entries are stored with different
+ *	 credentials.  We don't understand yet, if/how entries are NOT EQ but still
+ *	 EQUAL
+ * 4.	I wonder if this name cache could be replace by the vnode name cache.
+ *	The latter has no zapping functions, so probably not.
+ */
+
+#include <sys/param.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
+#include <sys/select.h>
+
+#include <cfs/coda.h>
+#include <cfs/cnode.h>
+#include <cfs/cfsnc.h>
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+#ifndef insque
+#include <sys/systm.h>
+#endif /* insque */
+#endif /* __NetBSD__ || defined(__FreeBSD__) */
+
+#ifdef	__FreeBSD__
+#include <vm/vm.h>
+#include <vm/vm_object.h>
+#ifdef	__FreeBSD_version
+#include <sys/ucred.h>
+#endif
+#endif
+
+/* 
+ * Declaration of the name cache data structure.
+ */
+
+int 	cfsnc_use = 1;			 /* Indicate use of CFS Name Cache */
+
+int	cfsnc_size = CFSNC_CACHESIZE;	 /* size of the cache */
+int	cfsnc_hashsize = CFSNC_HASHSIZE; /* size of the primary hash */
+
+struct 	cfscache *cfsncheap;	/* pointer to the cache entries */
+struct	cfshash  *cfsnchash;	/* hash table of cfscache pointers */
+struct	cfslru   cfsnc_lru;	/* head of lru chain */
+
+struct cfsnc_statistics cfsnc_stat;	/* Keep various stats */
+
+/* 
+ * for testing purposes
+ */
+int cfsnc_debug = 0;
+
+
+/*
+ * Entry points for the CFS Name Cache
+ */
+static struct cfscache *
+cfsnc_find(struct cnode *dcp, const char *name, int namelen,
+	struct ucred *cred, int hash);
+static void
+cfsnc_remove(struct cfscache *cncp, enum dc_status dcstat);
+
+
+/*  
+ * Initialize the cache, the LRU structure and the Hash structure(s)
+ */
+
+#define TOTAL_CACHE_SIZE 	(sizeof(struct cfscache) * cfsnc_size)
+#define TOTAL_HASH_SIZE 	(sizeof(struct cfshash)  * cfsnc_hashsize)
+
+int cfsnc_initialized = 0;      /* Initially the cache has not been initialized */
+
+void
+cfsnc_init(void)
+{
+    int i;
+
+    /* zero the statistics structure */
+    
+    bzero(&cfsnc_stat, (sizeof(struct cfsnc_statistics)));
+
+    printf("CFS NAME CACHE: CACHE %d, HASH TBL %d\n", CFSNC_CACHESIZE, CFSNC_HASHSIZE);
+    CFS_ALLOC(cfsncheap, struct cfscache *, TOTAL_CACHE_SIZE);
+    CFS_ALLOC(cfsnchash, struct cfshash *, TOTAL_HASH_SIZE);
+    
+    cfsnc_lru.lru_next = 
+	cfsnc_lru.lru_prev = (struct cfscache *)LRU_PART(&cfsnc_lru);
+    
+    
+    for (i=0; i < cfsnc_size; i++) {	/* initialize the heap */
+	CFSNC_LRUINS(&cfsncheap[i], &cfsnc_lru);
+	CFSNC_HSHNUL(&cfsncheap[i]);
+	cfsncheap[i].cp = cfsncheap[i].dcp = (struct cnode *)0;
+    }
+    
+    for (i=0; i < cfsnc_hashsize; i++) {	/* initialize the hashtable */
+	CFSNC_HSHNUL((struct cfscache *)&cfsnchash[i]);
+    }
+    
+    cfsnc_initialized++;
+}
+
+/*
+ * Auxillary routines -- shouldn't be entry points
+ */
+
+static struct cfscache *
+cfsnc_find(dcp, name, namelen, cred, hash)
+	struct cnode *dcp;
+	const char *name;
+	int namelen;
+	struct ucred *cred;
+	int hash;
+{
+	/* 
+	 * hash to find the appropriate bucket, look through the chain
+	 * for the right entry (especially right cred, unless cred == 0) 
+	 */
+	struct cfscache *cncp;
+	int count = 1;
+
+	CFSNC_DEBUG(CFSNC_FIND, 
+		    myprintf(("cfsnc_find(dcp %p, name %s, len %d, cred %p, hash %d\n",
+			   dcp, name, namelen, cred, hash));)
+
+	for (cncp = cfsnchash[hash].hash_next; 
+	     cncp != (struct cfscache *)&cfsnchash[hash];
+	     cncp = cncp->hash_next, count++) 
+	{
+
+	    if ((CFS_NAMEMATCH(cncp, name, namelen, dcp)) &&
+		((cred == 0) || (cncp->cred == cred))) 
+	    { 
+		/* compare cr_uid instead */
+		cfsnc_stat.Search_len += count;
+		return(cncp);
+	    }
+#ifdef	DEBUG
+	    else if (CFS_NAMEMATCH(cncp, name, namelen, dcp)) {
+	    	printf("cfsnc_find: name %s, new cred = %p, cred = %p\n",
+			name, cred, cncp->cred);
+		printf("nref %d, nuid %d, ngid %d // oref %d, ocred %d, ogid %d\n",
+			cred->cr_ref, cred->cr_uid, cred->cr_gid,
+			cncp->cred->cr_ref, cncp->cred->cr_uid, cncp->cred->cr_gid);
+		print_cred(cred);
+		print_cred(cncp->cred);
+	    }
+#endif
+	}
+
+	return((struct cfscache *)0);
+}
+
+/*
+ * Enter a new (dir cnode, name) pair into the cache, updating the
+ * LRU and Hash as needed.
+ */
+void
+cfsnc_enter(dcp, name, namelen, cred, cp)
+    struct cnode *dcp;
+    const char *name;
+    int namelen;
+    struct ucred *cred;
+    struct cnode *cp;
+{
+    struct cfscache *cncp;
+    int hash;
+    
+    if (cfsnc_use == 0)			/* Cache is off */
+	return;
+    
+    CFSNC_DEBUG(CFSNC_ENTER, 
+		myprintf(("Enter: dcp %p cp %p name %s cred %p \n",
+		       dcp, cp, name, cred)); )
+	
+    if (namelen > CFSNC_NAMELEN) {
+	CFSNC_DEBUG(CFSNC_ENTER, 
+		    myprintf(("long name enter %s\n",name));)
+	    cfsnc_stat.long_name_enters++;	/* record stats */
+	return;
+    }
+    
+    hash = CFSNC_HASH(name, namelen, dcp);
+    cncp = cfsnc_find(dcp, name, namelen, cred, hash);
+    if (cncp != (struct cfscache *) 0) {	
+	cfsnc_stat.dbl_enters++;		/* duplicate entry */
+	return;
+    }
+    
+    cfsnc_stat.enters++;		/* record the enters statistic */
+    
+    /* Grab the next element in the lru chain */
+    cncp = CFSNC_LRUGET(cfsnc_lru);
+    
+    CFSNC_LRUREM(cncp);	/* remove it from the lists */
+    
+    if (CFSNC_VALID(cncp)) {
+	/* Seems really ugly, but we have to decrement the appropriate
+	   hash bucket length here, so we have to find the hash bucket
+	   */
+	cfsnchash[CFSNC_HASH(cncp->name, cncp->namelen, cncp->dcp)].length--;
+	
+	cfsnc_stat.lru_rm++;	/* zapped a valid entry */
+	CFSNC_HSHREM(cncp);
+	vrele(CTOV(cncp->dcp)); 
+	vrele(CTOV(cncp->cp));
+	crfree(cncp->cred);
+    }
+    
+    /*
+     * Put a hold on the current vnodes and fill in the cache entry.
+     */
+    vref(CTOV(cp));
+    vref(CTOV(dcp));
+    crhold(cred); 
+    cncp->dcp = dcp;
+    cncp->cp = cp;
+    cncp->namelen = namelen;
+    cncp->cred = cred;
+    
+    bcopy(name, cncp->name, (unsigned)namelen);
+    
+    /* Insert into the lru and hash chains. */
+    
+    CFSNC_LRUINS(cncp, &cfsnc_lru);
+    CFSNC_HSHINS(cncp, &cfsnchash[hash]);
+    cfsnchash[hash].length++;                      /* Used for tuning */
+    
+    CFSNC_DEBUG(CFSNC_PRINTCFSNC, print_cfsnc(); )
+}
+
+/*
+ * Find the (dir cnode, name) pair in the cache, if it's cred
+ * matches the input, return it, otherwise return 0
+ */
+struct cnode *
+cfsnc_lookup(dcp, name, namelen, cred)
+	struct cnode *dcp;
+	const char *name;
+	int namelen;
+	struct ucred *cred;
+{
+	int hash;
+	struct cfscache *cncp;
+
+	if (cfsnc_use == 0)			/* Cache is off */
+		return((struct cnode *) 0);
+
+	if (namelen > CFSNC_NAMELEN) {
+	        CFSNC_DEBUG(CFSNC_LOOKUP, 
+			    myprintf(("long name lookup %s\n",name));)
+		cfsnc_stat.long_name_lookups++;		/* record stats */
+		return((struct cnode *) 0);
+	}
+
+	/* Use the hash function to locate the starting point,
+	   then the search routine to go down the list looking for
+	   the correct cred.
+ 	 */
+
+	hash = CFSNC_HASH(name, namelen, dcp);
+	cncp = cfsnc_find(dcp, name, namelen, cred, hash);
+	if (cncp == (struct cfscache *) 0) {
+		cfsnc_stat.misses++;			/* record miss */
+		return((struct cnode *) 0);
+	}
+
+	cfsnc_stat.hits++;
+
+	/* put this entry at the end of the LRU */
+	CFSNC_LRUREM(cncp);
+	CFSNC_LRUINS(cncp, &cfsnc_lru);
+
+	/* move it to the front of the hash chain */
+	/* don't need to change the hash bucket length */
+	CFSNC_HSHREM(cncp);
+	CFSNC_HSHINS(cncp, &cfsnchash[hash]);
+
+	CFSNC_DEBUG(CFSNC_LOOKUP, 
+		printf("lookup: dcp %p, name %s, cred %p = cp %p\n",
+			dcp, name, cred, cncp->cp); )
+
+	return(cncp->cp);
+}
+
+static void
+cfsnc_remove(cncp, dcstat)
+	struct cfscache *cncp;
+	enum dc_status dcstat;
+{
+	/* 
+	 * remove an entry -- vrele(cncp->dcp, cp), crfree(cred),
+	 * remove it from it's hash chain, and
+	 * place it at the head of the lru list.
+	 */
+        CFSNC_DEBUG(CFSNC_REMOVE,
+		    myprintf(("cfsnc_remove %s from parent %lx.%lx.%lx\n",
+			   cncp->name, (cncp->dcp)->c_fid.Volume,
+			   (cncp->dcp)->c_fid.Vnode, (cncp->dcp)->c_fid.Unique));)
+
+  	CFSNC_HSHREM(cncp);
+
+	CFSNC_HSHNUL(cncp);		/* have it be a null chain */
+	if ((dcstat == IS_DOWNCALL) && (CTOV(cncp->dcp)->v_usecount == 1)) {
+		cncp->dcp->c_flags |= C_PURGING;
+	}
+	vrele(CTOV(cncp->dcp)); 
+
+	if ((dcstat == IS_DOWNCALL) && (CTOV(cncp->cp)->v_usecount == 1)) {
+		cncp->cp->c_flags |= C_PURGING;
+	}
+	vrele(CTOV(cncp->cp)); 
+
+	crfree(cncp->cred); 
+	bzero(DATA_PART(cncp),DATA_SIZE);
+
+	/* Put the null entry just after the least-recently-used entry */
+	/* LRU_TOP adjusts the pointer to point to the top of the structure. */
+	CFSNC_LRUREM(cncp);
+	CFSNC_LRUINS(cncp, LRU_TOP(cfsnc_lru.lru_prev));
+}
+
+/*
+ * Remove all entries with a parent which has the input fid.
+ */
+void
+cfsnc_zapParentfid(fid, dcstat)
+	ViceFid *fid;
+	enum dc_status dcstat;
+{
+	/* To get to a specific fid, we might either have another hashing
+	   function or do a sequential search through the cache for the
+	   appropriate entries. The later may be acceptable since I don't
+	   think callbacks or whatever Case 1 covers are frequent occurences.
+	 */
+	struct cfscache *cncp, *ncncp;
+	int i;
+
+	if (cfsnc_use == 0)			/* Cache is off */
+		return;
+
+	CFSNC_DEBUG(CFSNC_ZAPPFID, 
+		myprintf(("ZapParent: fid 0x%lx, 0x%lx, 0x%lx \n",
+			fid->Volume, fid->Vnode, fid->Unique)); )
+
+	cfsnc_stat.zapPfids++;
+
+	for (i = 0; i < cfsnc_hashsize; i++) {
+
+		/*
+		 * Need to save the hash_next pointer in case we remove the
+		 * entry. remove causes hash_next to point to itself.
+		 */
+
+		for (cncp = cfsnchash[i].hash_next; 
+		     cncp != (struct cfscache *)&cfsnchash[i];
+		     cncp = ncncp) {
+			ncncp = cncp->hash_next;
+			if ((cncp->dcp->c_fid.Volume == fid->Volume) &&
+			    (cncp->dcp->c_fid.Vnode == fid->Vnode)   &&
+			    (cncp->dcp->c_fid.Unique == fid->Unique)) {
+			        cfsnchash[i].length--;      /* Used for tuning */
+				cfsnc_remove(cncp, dcstat); 
+			}
+		}
+	}
+}
+
+
+/*
+ * Remove all entries which have the same fid as the input
+ */
+void
+cfsnc_zapfid(fid, dcstat)
+	ViceFid *fid;
+	enum dc_status dcstat;
+{
+	/* See comment for zapParentfid. This routine will be used
+	   if attributes are being cached. 
+	 */
+	struct cfscache *cncp, *ncncp;
+	int i;
+
+	if (cfsnc_use == 0)			/* Cache is off */
+		return;
+
+	CFSNC_DEBUG(CFSNC_ZAPFID, 
+		myprintf(("Zapfid: fid 0x%lx, 0x%lx, 0x%lx \n",
+			fid->Volume, fid->Vnode, fid->Unique)); )
+
+	cfsnc_stat.zapFids++;
+
+	for (i = 0; i < cfsnc_hashsize; i++) {
+		for (cncp = cfsnchash[i].hash_next; 
+		     cncp != (struct cfscache *)&cfsnchash[i];
+		     cncp = ncncp) {
+			ncncp = cncp->hash_next;
+			if ((cncp->cp->c_fid.Volume == fid->Volume) &&
+			    (cncp->cp->c_fid.Vnode == fid->Vnode)   &&
+			    (cncp->cp->c_fid.Unique == fid->Unique)) {
+			        cfsnchash[i].length--;     /* Used for tuning */
+				cfsnc_remove(cncp, dcstat); 
+			}
+		}
+	}
+}
+
+/* 
+ * Remove all entries which match the fid and the cred
+ */
+void
+cfsnc_zapvnode(fid, cred, dcstat)	
+	ViceFid *fid;
+	struct ucred *cred;
+	enum dc_status dcstat;
+{
+	/* See comment for zapfid. I don't think that one would ever
+	   want to zap a file with a specific cred from the kernel.
+	   We'll leave this one unimplemented.
+	 */
+	if (cfsnc_use == 0)			/* Cache is off */
+		return;
+
+	CFSNC_DEBUG(CFSNC_ZAPVNODE, 
+		myprintf(("Zapvnode: fid 0x%lx, 0x%lx, 0x%lx cred %p\n",
+			  fid->Volume, fid->Vnode, fid->Unique, cred)); )
+
+}
+
+/*
+ * Remove all entries which have the (dir vnode, name) pair
+ */
+void
+cfsnc_zapfile(dcp, name, namelen)
+	struct cnode *dcp;
+	const char *name;
+	int namelen;
+{
+	/* use the hash function to locate the file, then zap all
+ 	   entries of it regardless of the cred.
+	 */
+	struct cfscache *cncp;
+	int hash;
+
+	if (cfsnc_use == 0)			/* Cache is off */
+		return;
+
+	CFSNC_DEBUG(CFSNC_ZAPFILE, 
+		myprintf(("Zapfile: dcp %p name %s \n",
+			  dcp, name)); )
+
+	if (namelen > CFSNC_NAMELEN) {
+		cfsnc_stat.long_remove++;		/* record stats */
+		return;
+	}
+
+	cfsnc_stat.zapFile++;
+
+	hash = CFSNC_HASH(name, namelen, dcp);
+	cncp = cfsnc_find(dcp, name, namelen, 0, hash);
+
+	while (cncp) {
+	  cfsnchash[hash].length--;                 /* Used for tuning */
+/* 1.3 */
+	  cfsnc_remove(cncp, NOT_DOWNCALL);
+	  cncp = cfsnc_find(dcp, name, namelen, 0, hash);
+	}
+}
+
+/* 
+ * Remove all the entries for a particular user. Used when tokens expire.
+ * A user is determined by his/her effective user id (id_uid).
+ */
+void
+cfsnc_purge_user(uid, dcstat)
+	vuid_t	uid;
+	enum dc_status  dcstat;
+{
+	/* 
+	 * I think the best approach is to go through the entire cache
+	 * via HASH or whatever and zap all entries which match the
+	 * input cred. Or just flush the whole cache.  It might be
+	 * best to go through on basis of LRU since cache will almost
+	 * always be full and LRU is more straightforward.  
+	 */
+
+	struct cfscache *cncp, *ncncp;
+	int hash;
+
+	if (cfsnc_use == 0)			/* Cache is off */
+		return;
+
+	CFSNC_DEBUG(CFSNC_PURGEUSER, 
+		myprintf(("ZapDude: uid %lx\n", uid)); )
+	cfsnc_stat.zapUsers++;
+
+	for (cncp = CFSNC_LRUGET(cfsnc_lru);
+	     cncp != (struct cfscache *)(&cfsnc_lru);
+	     cncp = ncncp) {
+		ncncp = CFSNC_LRUGET(*cncp);
+
+		if ((CFSNC_VALID(cncp)) &&
+		   ((cncp->cred)->cr_uid == uid)) {
+		        /* Seems really ugly, but we have to decrement the appropriate
+			   hash bucket length here, so we have to find the hash bucket
+			   */
+		        hash = CFSNC_HASH(cncp->name, cncp->namelen, cncp->dcp);
+			cfsnchash[hash].length--;     /* For performance tuning */
+
+			cfsnc_remove(cncp, dcstat); 
+		}
+	}
+}
+
+/*
+ * Flush the entire name cache. In response to a flush of the Venus cache.
+ */
+void
+cfsnc_flush(dcstat)
+	enum dc_status dcstat;
+{
+	/* One option is to deallocate the current name cache and
+	   call init to start again. Or just deallocate, then rebuild.
+	   Or again, we could just go through the array and zero the 
+	   appropriate fields. 
+	 */
+	
+	/* 
+	 * Go through the whole lru chain and kill everything as we go.
+	 * I don't use remove since that would rebuild the lru chain
+	 * as it went and that seemed unneccesary.
+	 */
+	struct cfscache *cncp;
+	int i;
+
+	if (cfsnc_use == 0)			/* Cache is off */
+		return;
+
+	cfsnc_stat.Flushes++;
+
+	for (cncp = CFSNC_LRUGET(cfsnc_lru);
+	     cncp != (struct cfscache *)&cfsnc_lru;
+	     cncp = CFSNC_LRUGET(*cncp)) {
+		if (CFSNC_VALID(cncp)) {
+
+			CFSNC_HSHREM(cncp);	/* only zero valid nodes */
+			CFSNC_HSHNUL(cncp);
+			if ((dcstat == IS_DOWNCALL) 
+			    && (CTOV(cncp->dcp)->v_usecount == 1))
+			{
+				cncp->dcp->c_flags |= C_PURGING;
+			}
+			vrele(CTOV(cncp->dcp)); 
+
+			if (CTOV(cncp->cp)->v_flag & VTEXT) {
+			    if (cfs_vmflush(cncp->cp))
+				CFSDEBUG(CFS_FLUSH, 
+					 myprintf(("cfsnc_flush: (%lx.%lx.%lx) busy\n", cncp->cp->c_fid.Volume, cncp->cp->c_fid.Vnode, cncp->cp->c_fid.Unique)); )
+			}
+
+			if ((dcstat == IS_DOWNCALL) 
+			    && (CTOV(cncp->cp)->v_usecount == 1))
+			{
+				cncp->cp->c_flags |= C_PURGING;
+			}
+			vrele(CTOV(cncp->cp));  
+
+			crfree(cncp->cred); 
+			bzero(DATA_PART(cncp),DATA_SIZE);
+		}
+	}
+
+	for (i = 0; i < cfsnc_hashsize; i++)
+	  cfsnchash[i].length = 0;
+}
+
+/*
+ * Debugging routines
+ */
+
+/* 
+ * This routine should print out all the hash chains to the console.
+ */
+void
+print_cfsnc(void)
+{
+	int hash;
+	struct cfscache *cncp;
+
+	for (hash = 0; hash < cfsnc_hashsize; hash++) {
+		myprintf(("\nhash %d\n",hash));
+
+		for (cncp = cfsnchash[hash].hash_next; 
+		     cncp != (struct cfscache *)&cfsnchash[hash];
+		     cncp = cncp->hash_next) {
+			myprintf(("cp %p dcp %p cred %p name %s\n",
+				  cncp->cp, cncp->dcp,
+				  cncp->cred, cncp->name));
+		     }
+	}
+}
+
+void
+cfsnc_gather_stats(void)
+{
+    int i, max = 0, sum = 0, temp, zeros = 0, ave, n;
+
+	for (i = 0; i < cfsnc_hashsize; i++) {
+	  if (cfsnchash[i].length) {
+	    sum += cfsnchash[i].length;
+	  } else {
+	    zeros++;
+	  }
+
+	  if (cfsnchash[i].length > max)
+	    max = cfsnchash[i].length;
+	}
+
+	/*
+	 * When computing the Arithmetic mean, only count slots which 
+	 * are not empty in the distribution.
+	 */
+        cfsnc_stat.Sum_bucket_len = sum;
+        cfsnc_stat.Num_zero_len = zeros;
+        cfsnc_stat.Max_bucket_len = max;
+
+	if ((n = cfsnc_hashsize - zeros) > 0) 
+	  ave = sum / n;
+	else
+	  ave = 0;
+
+	sum = 0;
+	for (i = 0; i < cfsnc_hashsize; i++) {
+	  if (cfsnchash[i].length) {
+	    temp = cfsnchash[i].length - ave;
+	    sum += temp * temp;
+	  }
+	}
+        cfsnc_stat.Sum2_bucket_len = sum;
+}
+
+/*
+ * The purpose of this routine is to allow the hash and cache sizes to be
+ * changed dynamically. This should only be used in controlled environments,
+ * it makes no effort to lock other users from accessing the cache while it
+ * is in an improper state (except by turning the cache off).
+ */
+int
+cfsnc_resize(hashsize, heapsize, dcstat)
+     int hashsize, heapsize;
+     enum dc_status dcstat;
+{
+    if ((hashsize % 2) || (heapsize % 2)) { /* Illegal hash or cache sizes */
+	return(EINVAL);
+    }                 
+    
+    cfsnc_use = 0;                       /* Turn the cache off */
+    
+    cfsnc_flush(dcstat);                 /* free any cnodes in the cache */
+    
+    /* WARNING: free must happen *before* size is reset */
+    CFS_FREE(cfsncheap,TOTAL_CACHE_SIZE);
+    CFS_FREE(cfsnchash,TOTAL_HASH_SIZE);
+    
+    cfsnc_hashsize = hashsize;
+    cfsnc_size = heapsize;
+    
+    cfsnc_init();                        /* Set up a cache with the new size */
+    
+    cfsnc_use = 1;                       /* Turn the cache back on */
+    return(0);
+}
+
+#define DEBUG
+#ifdef	DEBUG
+char cfsnc_name_buf[CFS_MAXNAMLEN+1];
+
+void
+cfsnc_name(struct cnode *cp)
+{
+	struct cfscache *cncp, *ncncp;
+	int i;
+
+	if (cfsnc_use == 0)			/* Cache is off */
+		return;
+
+	for (i = 0; i < cfsnc_hashsize; i++) {
+		for (cncp = cfsnchash[i].hash_next; 
+		     cncp != (struct cfscache *)&cfsnchash[i];
+		     cncp = ncncp) {
+			ncncp = cncp->hash_next;
+			if (cncp->cp == cp) {
+				bcopy(cncp->name, cfsnc_name_buf, cncp->namelen);
+				cfsnc_name_buf[cncp->namelen] = 0;
+				printf(" is %s (%p,%p)@%p",
+					cfsnc_name_buf, cncp->cp, cncp->dcp, cncp);
+			}
+
+		}
+	}
+}
+#endif
diff --git a/sys/fs/coda/coda_namecache.h b/sys/fs/coda/coda_namecache.h
new file mode 100644
index 0000000..86ed38c
--- /dev/null
+++ b/sys/fs/coda/coda_namecache.h
@@ -0,0 +1,273 @@
+/*
+
+            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/cfsnc.h,v 1.8 1998/08/28 18:12:25 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1990 Carnegie-Mellon University
+ * 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: cfsnc.h,v $
+ * Revision 1.8  1998/08/28 18:12:25  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 1.7  1998/08/18 17:05:24  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.6  1998/08/18 16:31:49  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.5  98/01/23  11:53:51  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.4.2.1  97/12/16  12:40:23  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.4  97/12/05  10:39:29  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.3.4.3  97/11/24  15:44:51  rvb
+ * Final cfs_venus.c w/o macros, but one locking bug
+ * 
+ * Revision 1.3.4.2  97/11/12  12:09:44  rvb
+ * reorg pass1
+ * 
+ * Revision 1.3.4.1  97/11/06  21:06:05  rvb
+ * don't include headers in headers
+ * 
+ * Revision 1.3  97/08/05  11:08:19  lily
+ * Removed cfsnc_replace, replaced it with a cfs_find, unhash, and
+ * rehash.  This fixes a cnode leak and a bug in which the fid is
+ * not actually replaced.  (cfs_namecache.c, cfsnc.h, cfs_subr.c)
+ * 
+ * Revision 1.2  96/01/02  16:57:19  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ * 
+ * Revision 1.1.2.1  1995/12/20 01:57:45  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 3.1.1.1  1995/03/04  19:08:22  bnoble
+ * Branch for NetBSD port revisions
+ *
+ * Revision 3.1  1995/03/04  19:08:21  bnoble
+ * Bump to major revision 3 to prepare for NetBSD port
+ *
+ * Revision 2.2  1994/08/28  19:37:39  luqi
+ * Add a new CFS_REPLACE call to allow venus to replace a ViceFid in the
+ * mini-cache.
+ *
+ * In "cfs.h":
+ * Add CFS_REPLACE decl.
+ *
+ * In "cfs_namecache.c":
+ * Add routine cfsnc_replace.
+ *
+ * In "cfs_subr.c":
+ * Add case-statement to process CFS_REPLACE.
+ *
+ * In "cfsnc.h":
+ * Add decl for CFSNC_REPLACE.
+ *
+ * Revision 2.1  94/07/21  16:25:27  satya
+ * Conversion to C++ 3.0; start of Coda Release 2.0
+ *
+ * Revision 1.2  92/10/27  17:58:34  lily
+ * merge kernel/latest and alpha/src/cfs
+ * 
+ * Revision 2.2  90/07/05  11:27:04  mrt
+ * 	Created for the Coda File System.
+ * 	[90/05/23            dcs]
+ * 
+ * Revision 1.4  90/05/31  17:02:12  dcs
+ * Prepare for merge with facilities kernel.
+ * 
+ * 
+ */
+#ifndef _CFSNC_HEADER_
+#define _CFSNC_HEADER_
+
+/*
+ * Cfs constants
+ */
+#define CFSNC_NAMELEN	15		/* longest name stored in cache */
+#define CFSNC_CACHESIZE 256		/* Default cache size */
+#define CFSNC_HASHSIZE	64		/* Must be multiple of 2 */
+
+/*
+ * Hash function for the primary hash.
+ */
+
+/* 
+ * First try -- (first + last letters + length + (int)cp) mod size
+ * 2nd try -- same, except dir fid.vnode instead of cp
+ */
+
+#ifdef	oldhash
+#define CFSNC_HASH(name, namelen, cp) \
+	((name[0] + name[namelen-1] + namelen + (int)(cp)) & (cfsnc_hashsize-1))
+#else
+#define CFSNC_HASH(name, namelen, cp) \
+	((name[0] + (name[namelen-1]<<4) + namelen + (((int)cp)>>8)) & (cfsnc_hashsize-1))
+#endif
+
+#define CFS_NAMEMATCH(cp, name, namelen, dcp) \
+	((namelen == cp->namelen) && (dcp == cp->dcp) && \
+		 (bcmp(cp->name,name,namelen) == 0))
+
+/*
+ * Functions to modify the hash and lru chains.
+ * insque and remque assume that the pointers are the first thing
+ * in the list node, thus the trickery for lru.
+ */
+
+#define CFSNC_HSHINS(elem, pred)	insque(elem,pred)
+#define CFSNC_HSHREM(elem)		remque(elem)
+#define CFSNC_HSHNUL(elem)		(elem)->hash_next = \
+					(elem)->hash_prev = (elem)
+
+#define CFSNC_LRUINS(elem, pred)	insque(LRU_PART(elem), LRU_PART(pred))
+#define CFSNC_LRUREM(elem)		remque(LRU_PART(elem));
+#define CFSNC_LRUGET(lruhead)		LRU_TOP((lruhead).lru_prev)
+
+#define CFSNC_VALID(cncp)	(cncp->dcp != (struct cnode *)0)
+ 
+#define LRU_PART(cncp)			(struct cfscache *) \
+				((char *)cncp + (2*sizeof(struct cfscache *)))
+#define LRU_TOP(cncp)				(struct cfscache *) \
+			((char *)cncp - (2*sizeof(struct cfscache *)))
+#define DATA_PART(cncp)				(struct cfscache *) \
+			((char *)cncp + (4*sizeof(struct cfscache *)))
+#define DATA_SIZE	(sizeof(struct cfscache)-(4*sizeof(struct cfscache *)))
+
+/*
+ * Structure for an element in the CFS Name Cache.
+ * NOTE: I use the position of arguments and their size in the
+ * implementation of the functions CFSNC_LRUINS, CFSNC_LRUREM, and
+ * DATA_PART.
+ */
+
+struct cfscache {	
+	struct cfscache	*hash_next,*hash_prev;	/* Hash list */
+	struct cfscache	*lru_next, *lru_prev;	/* LRU list */
+	struct cnode	*cp;			/* vnode of the file */
+	struct cnode	*dcp;			/* parent's cnode */
+	struct ucred	*cred;			/* user credentials */
+	char		name[CFSNC_NAMELEN];	/* segment name */
+	int		namelen;		/* length of name */
+};
+
+struct	cfslru {		/* Start of LRU chain */
+	char *dummy1, *dummy2;			/* place holders */
+	struct cfscache *lru_next, *lru_prev;   /* position of pointers is important */
+};
+
+
+struct cfshash {		/* Start of Hash chain */
+	struct cfscache *hash_next, *hash_prev; /* NOTE: chain pointers must be first */
+        int length;                             /* used for tuning purposes */
+};
+
+
+/* 
+ * Symbols to aid in debugging the namecache code. Assumes the existence
+ * of the variable cfsnc_debug, which is defined in cfs_namecache.c
+ */
+#define CFSNC_DEBUG(N, STMT)     { if (cfsnc_debug & (1 <<N)) { STMT } }
+
+/* Prototypes of functions exported within cfs */
+extern void cfsnc_init(void);
+extern void cfsnc_enter(struct cnode *, const char *, int, struct ucred *, struct cnode *);
+extern struct cnode *cfsnc_lookup(struct cnode *, const char *, int, struct ucred *);
+
+extern void cfsnc_zapParentfid(ViceFid *, enum dc_status);
+extern void cfsnc_zapfid(ViceFid *, enum dc_status);
+extern void cfsnc_zapvnode(ViceFid *, struct ucred *, enum dc_status);
+extern void cfsnc_zapfile(struct cnode *, const char *, int);
+extern void cfsnc_purge_user(vuid_t, enum dc_status);
+extern void cfsnc_flush(enum dc_status);
+
+extern void print_cfsnc(void);
+extern void cfsnc_gather_stats(void);
+extern int  cfsnc_resize(int, int, enum dc_status);
+extern void cfsnc_name(struct cnode *cp);
+
+/*
+ * Structure to contain statistics on the cache usage
+ */
+
+struct cfsnc_statistics {
+	unsigned	hits;
+	unsigned	misses;
+	unsigned	enters;
+	unsigned	dbl_enters;
+	unsigned	long_name_enters;
+	unsigned	long_name_lookups;
+	unsigned	long_remove;
+	unsigned	lru_rm;
+	unsigned	zapPfids;
+	unsigned	zapFids;
+	unsigned	zapFile;
+	unsigned	zapUsers;
+	unsigned	Flushes;
+	unsigned        Sum_bucket_len;
+	unsigned        Sum2_bucket_len;
+	unsigned        Max_bucket_len;
+	unsigned        Num_zero_len;
+	unsigned        Search_len;
+};
+
+#define CFSNC_FIND		((u_long) 1)
+#define CFSNC_REMOVE		((u_long) 2)
+#define CFSNC_INIT		((u_long) 3)
+#define CFSNC_ENTER		((u_long) 4)
+#define CFSNC_LOOKUP		((u_long) 5)
+#define CFSNC_ZAPPFID		((u_long) 6)
+#define CFSNC_ZAPFID		((u_long) 7)
+#define CFSNC_ZAPVNODE		((u_long) 8)
+#define CFSNC_ZAPFILE		((u_long) 9)
+#define CFSNC_PURGEUSER		((u_long) 10)
+#define CFSNC_FLUSH		((u_long) 11)
+#define CFSNC_PRINTCFSNC	((u_long) 12)
+#define CFSNC_PRINTSTATS	((u_long) 13)
+
+#endif /* _CFSNC_HEADER_ */
diff --git a/sys/fs/coda/coda_opstats.h b/sys/fs/coda/coda_opstats.h
new file mode 100644
index 0000000..37017f2
--- /dev/null
+++ b/sys/fs/coda/coda_opstats.h
@@ -0,0 +1,129 @@
+/*
+
+            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/coda_opstats.h,v 1.5 1998/08/18 17:05:25 rvb Exp $ */
+
+
+/*
+ * operation stats: what the minicache can intercept that
+ * *isn't* seen by venus.  These stats are kept to augment
+ * the stats maintained by the Volume-Session mechanism.
+ */
+
+/* vfsops:
+ *          mount: not currently bounced to Venus
+ *          umount: nope
+ *          root: only first call, rest is cached.
+ *          statfs: none (bogus)
+ *          sync: none (bogus)
+ *          vget: all
+ */
+
+#define CFS_MOUNT_STATS  0
+#define CFS_UMOUNT_STATS 1
+#define CFS_ROOT_STATS   2
+#define CFS_STATFS_STATS 3
+#define CFS_SYNC_STATS   4
+#define CFS_VGET_STATS   5
+#define CFS_VFSOPS_SIZE  6
+
+/* vnodeops:
+ *            open: all to venus
+ *            close: all to venus
+ *            rdrw: bogus.  Maybe redirected to UFS.
+ *                          May call open/close for internal opens/closes
+ *                          (Does exec not call open?)
+ *            ioctl: causes a lookupname
+ *                   passes through
+ *            select: can't get there from here.
+ *            getattr: can be satsified by cache
+ *            setattr: all go through
+ *            access: can be satisfied by cache
+ *            readlink: can be satisfied by cache
+ *            fsync: passes through
+ *            inactive: passes through
+ *            lookup: can be satisfied by cache
+ *            create: passes through
+ *            remove: passes through
+ *            link: passes through
+ *            rename: passes through
+ *            mkdir: passes through
+ *            rmdir: passes through
+ *            symlink: passes through
+ *            readdir: may be redirected to UFS
+ *                     may cause an "internal" open/close
+ */
+
+#define CFS_OPEN_STATS     0
+#define CFS_CLOSE_STATS    1
+#define CFS_RDWR_STATS     2
+#define CFS_IOCTL_STATS    3
+#define CFS_SELECT_STATS   4
+#define CFS_GETATTR_STATS  5
+#define CFS_SETATTR_STATS  6
+#define CFS_ACCESS_STATS   7
+#define CFS_READLINK_STATS 8
+#define CFS_FSYNC_STATS    9
+#define CFS_INACTIVE_STATS 10
+#define CFS_LOOKUP_STATS   11
+#define CFS_CREATE_STATS   12
+#define CFS_REMOVE_STATS   13
+#define CFS_LINK_STATS     14
+#define CFS_RENAME_STATS   15
+#define CFS_MKDIR_STATS    16
+#define CFS_RMDIR_STATS    17
+#define CFS_SYMLINK_STATS  18
+#define CFS_READDIR_STATS  19
+#define CFS_VNODEOPS_SIZE  20
+
+
+/*
+ * I propose the following structres:
+ */
+
+
+struct cfs_op_stats {
+    int opcode;       /* vfs opcode */
+    long entries;     /* number of times call attempted */
+    long sat_intrn;   /* number of times call satisfied by cache */
+    long unsat_intrn; /* number of times call failed in cache, but
+                         was not bounced to venus proper. */
+    long gen_intrn;   /* number of times call generated internally */
+                      /* (do we need that?) */
+};
+
+
+/*
+ * With each call to the minicache, we'll bump the counters whenver
+ * a call is satisfied internally (through the cache or through a
+ * redirect), and whenever an operation is caused internally.
+ * Then, we can add the total operations caught by the minicache
+ * to the world-wide totals, and leave a caveat for the specific
+ * graphs later.
+ */
diff --git a/sys/fs/coda/coda_pioctl.h b/sys/fs/coda/coda_pioctl.h
new file mode 100644
index 0000000..3e89570
--- /dev/null
+++ b/sys/fs/coda/coda_pioctl.h
@@ -0,0 +1,124 @@
+/*
+
+            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/pioctl.h,v 1.7 1998/08/28 18:12:26 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1989 Carnegie-Mellon University
+ * Copyright (c) 1988 Carnegie-Mellon University
+ * Copyright (c) 1987 Carnegie-Mellon University
+ * All rights reserved.  The CMU software License Agreement specifies
+ * the terms and conditions for use and redistribution.
+ */
+
+/*
+ * HISTORY
+ * $Log: pioctl.h,v $
+ * Revision 1.7  1998/08/28 18:12:26  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 1.6  1998/08/18 17:05:26  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.5  1998/08/18 16:31:51  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.4  98/01/23  11:53:54  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.3.2.1  97/12/06  17:41:29  rvb
+ * Sync with peters coda.h
+ * 
+ * Revision 1.3  97/12/05  10:39:31  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.2.34.2  97/11/13  22:03:06  rvb
+ * pass2 cfs_NetBSD.h mt
+ * 
+ * Revision 1.2.34.1  97/11/12  12:38:11  rvb
+ * mach_vioctl.h -> pioctl.h
+ * 
+ * Revision 1.2  96/01/02  16:57:27  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ * 
+ * Revision 1.1.2.1  1995/12/20 01:57:54  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 2.4  90/08/30  11:51:12  bohman
+ * 	Ioctl changes for STDC.
+ * 	[90/08/28            bohman]
+ * 
+ * Revision 2.3  89/03/09  22:10:26  rpd
+ * 	More cleanup.
+ * 
+ * Revision 2.2  89/02/25  17:58:32  gm0w
+ * 	Changes for cleanup.
+ * 
+ *  7-Feb-87  Avadis Tevanian (avie) at Carnegie-Mellon University
+ *	No need for VICE conditional.
+ *
+ * 22-Oct-86  Jay Kistler (jjk) at Carnegie-Mellon University
+ *	Created from Andrew's vice.h and viceioctl.h.
+ *
+ */
+/*
+ * ITC Remote file system - vice ioctl interface module
+ */
+
+/*
+ *  TODO:  Find /usr/local/include/viceioctl.h.
+ */
+
+#ifndef	_SYS_PIOCTL_H_
+#define _SYS_PIOCTL_H_
+
+/* The 2K limits above are a consequence of the size of the kernel buffer
+   used to buffer requests from the user to venus--2*MAXPATHLEN.
+   The buffer pointers may be null, or the counts may be 0 if there
+   are no input or output parameters
+ */
+
+#ifdef	__STDC__
+#define _VICEIOCTL(id)  ((unsigned int ) _IOW('V', id, struct ViceIoctl))
+#else
+#define _VICEIOCTL(id)  ((unsigned int ) _IOW(V, id, struct ViceIoctl))
+#endif
+/* Use this macro to define up to 256 vice ioctl's.  These ioctl's
+   all potentially have in/out parameters--this depends upon the
+   values in the ViceIoctl structure.  This structure is itself passed
+   into the kernel by the normal ioctl parameter passing mechanism.
+ */
+
+#define _VALIDVICEIOCTL(com) (com >= _VICEIOCTL(0) && com <= _VICEIOCTL(255))
+
+#endif	_SYS_PIOCTL_H_
diff --git a/sys/fs/coda/coda_psdev.c b/sys/fs/coda/coda_psdev.c
new file mode 100644
index 0000000..47b4754
--- /dev/null
+++ b/sys/fs/coda/coda_psdev.c
@@ -0,0 +1,756 @@
+/*
+
+            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_psdev.c,v 1.9 1998/08/28 18:12:17 rvb Exp $ */
+
+#define CTL_C
+
+/* 
+ * 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.  */
+
+/* ************************************************** */
+/* These routines define the psuedo device for communication between
+ * Coda's Venus and Minicache in Mach 2.6. They used to be in cfs_subr.c, 
+ * but I moved them to make it easier to port the Minicache without 
+ * porting coda. -- DCS 10/12/94
+ */
+
+/* 
+ * Renamed to cfs_psdev: pseudo-device driver.
+ */
+
+/*
+ * HISTORY
+ * $Log: cfs_psdev.c,v $
+ * Revision 1.9  1998/08/28 18:12:17  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 1.8  1998/08/18 17:05:15  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.7  1998/08/18 16:31:41  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.8  1998/06/09 23:30:42  rvb
+ * Try to allow ^C -- take 1
+ *
+ * Revision 1.5.2.8  98/01/23  11:21:04  rvb
+ * Sync with 2.2.5
+ * 
+ * Revision 1.5.2.7  98/01/22  22:22:21  rvb
+ * sync 1.2 and 1.3
+ * 
+ * Revision 1.5.2.6  98/01/22  13:11:24  rvb
+ * Move makecfsnode ctlfid later so vfsp is known; work on ^c and ^z
+ * 
+ * Revision 1.5.2.5  97/12/16  22:01:27  rvb
+ * Oops add cfs_subr.h cfs_venus.h; sync with peter
+ * 
+ * Revision 1.5.2.4  97/12/16  12:40:05  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.5.2.3  97/12/10  14:08:24  rvb
+ * Fix O_ flags; check result in cfscall
+ * 
+ * Revision 1.5.2.2  97/12/10  11:40:24  rvb
+ * No more ody
+ * 
+ * Revision 1.5.2.1  97/12/06  17:41:20  rvb
+ * Sync with peters coda.h
+ * 
+ * Revision 1.5  97/12/05  10:39:16  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.4.18.9  97/12/05  08:58:07  rvb
+ * peter found this one
+ * 
+ * Revision 1.4.18.8  97/11/26  15:28:57  rvb
+ * Cant make downcall pbuf == union cfs_downcalls yet
+ * 
+ * Revision 1.4.18.7  97/11/25  09:40:49  rvb
+ * Final cfs_venus.c w/o macros, but one locking bug
+ * 
+ * Revision 1.4.18.6  97/11/20  11:46:41  rvb
+ * Capture current cfs_venus
+ * 
+ * Revision 1.4.18.5  97/11/18  10:27:15  rvb
+ * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
+ * cfs_nb_foo and cfs_foo are joined
+ * 
+ * Revision 1.4.18.4  97/11/13  22:02:59  rvb
+ * pass2 cfs_NetBSD.h mt
+ * 
+ * Revision 1.4.18.3  97/11/12  12:09:38  rvb
+ * reorg pass1
+ * 
+ * Revision 1.4.18.2  97/10/29  16:06:09  rvb
+ * Kill DYING
+ * 
+ * Revision 1.4.18.1  1997/10/28 23:10:15  rvb
+ * >64Meg; venus can be killed!
+ *
+ * Revision 1.4  1996/12/12 22:10:58  bnoble
+ * Fixed the "downcall invokes venus operation" deadlock in all known cases.
+ * There may be more
+ *
+ * Revision 1.3  1996/11/13 04:14:20  bnoble
+ * Merging BNOBLE_WORK_6_20_96 into main line
+ *
+ * Revision 1.2.8.1  1996/08/22 14:25:04  bnoble
+ * Added a return code from vc_nb_close
+ *
+ * Revision 1.2  1996/01/02 16:56:58  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ *
+ * Revision 1.1.2.1  1995/12/20 01:57:24  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 1.1  1995/03/14  20:52:15  bnoble
+ * Initial revision
+ *
+ */
+
+/* These routines are the device entry points for Venus. */
+
+extern int cfsnc_initialized;    /* Set if cache has been initialized */
+
+#include <vcfs.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/mount.h>
+#include <sys/file.h>
+#ifdef	__FreeBSD_version
+#include <sys/ioccom.h>
+#else
+#include <sys/ioctl.h>
+#endif
+#ifdef	NetBSD1_3
+#include <sys/poll.h>
+#endif
+#ifdef	__FreeBSD_version
+#include <sys/poll.h>
+#else
+#include <sys/select.h>
+#endif
+
+#include <cfs/coda.h>
+#include <cfs/cnode.h>
+#include <cfs/cfsnc.h>
+#include <cfs/cfsio.h>
+
+int cfs_psdev_print_entry = 0;
+
+#ifdef __GNUC__
+#define ENTRY    \
+    if(cfs_psdev_print_entry) myprintf(("Entered %s\n",__FUNCTION__))
+#else
+#define ENTRY
+#endif 
+
+void vcfsattach(int n);
+int vc_nb_open(dev_t dev, int flag, int mode, struct proc *p);
+int vc_nb_close (dev_t dev, int flag, int mode, struct proc *p);
+int vc_nb_read(dev_t dev, struct uio *uiop, int flag);
+int vc_nb_write(dev_t dev, struct uio *uiop, int flag);
+int vc_nb_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p);
+#if	defined(NetBSD1_3) || defined(__FreeBSD_version)
+int vc_nb_poll(dev_t dev, int events, struct proc *p);
+#else
+int vc_nb_select(dev_t dev, int flag, struct proc *p);
+#endif
+
+struct vmsg {
+    struct queue vm_chain;
+    caddr_t	 vm_data;
+    u_short	 vm_flags;
+    u_short      vm_inSize;	/* Size is at most 5000 bytes */
+    u_short	 vm_outSize;
+    u_short	 vm_opcode; 	/* copied from data to save ptr lookup */
+    int		 vm_unique;
+    caddr_t	 vm_sleep;	/* Not used by Mach. */
+};
+
+#define	VM_READ	    1
+#define	VM_WRITE    2
+#define	VM_INTR	    4
+
+/* vcfsattach: do nothing */
+void
+vcfsattach(n)
+    int n;
+{
+}
+
+/* 
+ * These functions are written for NetBSD.
+ */
+int 
+vc_nb_open(dev, flag, mode, p)    
+    dev_t        dev;      
+    int          flag;     
+    int          mode;     
+    struct proc *p;             /* NetBSD only */
+{
+    register struct vcomm *vcp;
+    
+    ENTRY;
+
+    if (minor(dev) >= NVCFS || minor(dev) < 0)
+	return(ENXIO);
+    
+    if (!cfsnc_initialized)
+	cfsnc_init();
+    
+    vcp = &cfs_mnttbl[minor(dev)].mi_vcomm;
+    if (VC_OPEN(vcp))
+	return(EBUSY);
+    
+    bzero(&(vcp->vc_selproc), sizeof (struct selinfo));
+    INIT_QUEUE(vcp->vc_requests);
+    INIT_QUEUE(vcp->vc_replys);
+    MARK_VC_OPEN(vcp);
+    
+    cfs_mnttbl[minor(dev)].mi_vfsp = NULL;
+    cfs_mnttbl[minor(dev)].mi_rootvp = NULL;
+
+    return(0);
+}
+
+int 
+vc_nb_close (dev, flag, mode, p)    
+    dev_t        dev;      
+    int          flag;     
+    int          mode;     
+    struct proc *p;
+{
+    register struct vcomm *vcp;
+    register struct vmsg *vmp;
+    struct cfs_mntinfo *mi;
+    int                 err;
+	
+    ENTRY;
+
+    if (minor(dev) >= NVCFS || minor(dev) < 0)
+	return(ENXIO);
+
+    mi = &cfs_mnttbl[minor(dev)];
+    vcp = &(mi->mi_vcomm);
+    
+    if (!VC_OPEN(vcp))
+	panic("vcclose: not open");
+    
+    /* prevent future operations on this vfs from succeeding by auto-
+     * unmounting any vfs mounted via this device. This frees user or
+     * sysadm from having to remember where all mount points are located.
+     * Put this before WAKEUPs to avoid queuing new messages between
+     * the WAKEUP and the unmount (which can happen if we're unlucky)
+     */
+    if (mi->mi_rootvp) {
+	/* Let unmount know this is for real */
+	VTOC(mi->mi_rootvp)->c_flags |= C_UNMOUNTING;
+#ifdef	NEW_LOCKMGR
+#ifdef	__FreeBSD_version
+	/* dounmount is different ... probably wrong ... */
+#else
+	if (vfs_busy(mi->mi_vfsp, 0, 0))
+	    return (EBUSY);
+#endif
+#endif
+	cfs_unmounting(mi->mi_vfsp);
+	err = dounmount(mi->mi_vfsp, flag, p);
+	if (err)
+	    myprintf(("Error %d unmounting vfs in vcclose(%d)\n", 
+		      err, minor(dev)));
+    }
+    
+    /* Wakeup clients so they can return. */
+    for (vmp = (struct vmsg *)GETNEXT(vcp->vc_requests);
+	 !EOQ(vmp, vcp->vc_requests);
+	 vmp = (struct vmsg *)GETNEXT(vmp->vm_chain))
+    {	    
+	/* Free signal request messages and don't wakeup cause
+	   no one is waiting. */
+	if (vmp->vm_opcode == CFS_SIGNAL) {
+	    CFS_FREE((caddr_t)vmp->vm_data, (u_int)VC_IN_NO_DATA);
+	    CFS_FREE((caddr_t)vmp, (u_int)sizeof(struct vmsg));
+	    continue;
+	}
+	
+	wakeup(&vmp->vm_sleep);
+    }
+    
+    for (vmp = (struct vmsg *)GETNEXT(vcp->vc_replys);
+	 !EOQ(vmp, vcp->vc_replys);
+	 vmp = (struct vmsg *)GETNEXT(vmp->vm_chain))
+    {
+	wakeup(&vmp->vm_sleep);
+    }
+    
+    MARK_VC_CLOSED(vcp);
+    return 0;
+}
+
+int 
+vc_nb_read(dev, uiop, flag)   
+    dev_t        dev;  
+    struct uio  *uiop; 
+    int          flag;
+{
+    register struct vcomm *	vcp;
+    register struct vmsg *vmp;
+    int error = 0;
+    
+    ENTRY;
+
+    if (minor(dev) >= NVCFS || minor(dev) < 0)
+	return(ENXIO);
+    
+    vcp = &cfs_mnttbl[minor(dev)].mi_vcomm;
+    /* Get message at head of request queue. */
+    if (EMPTY(vcp->vc_requests))
+	return(0);	/* Nothing to read */
+    
+    vmp = (struct vmsg *)GETNEXT(vcp->vc_requests);
+    
+    /* Move the input args into userspace */
+    uiop->uio_rw = UIO_READ;
+    error = uiomove(vmp->vm_data, vmp->vm_inSize, uiop);
+    if (error) {
+	myprintf(("vcread: error (%d) on uiomove\n", error));
+	error = EINVAL;
+    }
+
+#ifdef DIAGNOSTIC    
+    if (vmp->vm_chain.forw == 0 || vmp->vm_chain.back == 0)
+	panic("vc_nb_read: bad chain");
+#endif
+
+    REMQUE(vmp->vm_chain);
+    
+    /* If request was a signal, free up the message and don't
+       enqueue it in the reply queue. */
+    if (vmp->vm_opcode == CFS_SIGNAL) {
+	if (cfsdebug)
+	    myprintf(("vcread: signal msg (%d, %d)\n", 
+		      vmp->vm_opcode, vmp->vm_unique));
+	CFS_FREE((caddr_t)vmp->vm_data, (u_int)VC_IN_NO_DATA);
+	CFS_FREE((caddr_t)vmp, (u_int)sizeof(struct vmsg));
+	return(error);
+    }
+    
+    vmp->vm_flags |= VM_READ;
+    INSQUE(vmp->vm_chain, vcp->vc_replys);
+    
+    return(error);
+}
+
+int
+vc_nb_write(dev, uiop, flag)   
+    dev_t        dev;  
+    struct uio  *uiop; 
+    int          flag;
+{
+    register struct vcomm *	vcp;
+    register struct vmsg *vmp;
+    struct cfs_out_hdr *out;
+    u_long seq;
+    u_long opcode;
+    int buf[2];
+    int error = 0;
+
+    ENTRY;
+
+    if (minor(dev) >= NVCFS || minor(dev) < 0)
+	return(ENXIO);
+    
+    vcp = &cfs_mnttbl[minor(dev)].mi_vcomm;
+    
+    /* Peek at the opcode, unique without transfering the data. */
+    uiop->uio_rw = UIO_WRITE;
+    error = uiomove((caddr_t)buf, sizeof(int) * 2, uiop);
+    if (error) {
+	myprintf(("vcwrite: error (%d) on uiomove\n", error));
+	return(EINVAL);
+    }
+    
+    opcode = buf[0];
+    seq = buf[1];
+	
+    if (cfsdebug)
+	myprintf(("vcwrite got a call for %ld.%ld\n", opcode, seq));
+    
+    if (DOWNCALL(opcode)) {
+	union outputArgs pbuf;
+	
+	/* get the rest of the data. */
+	uiop->uio_rw = UIO_WRITE;
+	error = uiomove((caddr_t)&pbuf.cfs_purgeuser.oh.result, sizeof(pbuf) - (sizeof(int)*2), uiop);
+	if (error) {
+	    myprintf(("vcwrite: error (%d) on uiomove (Op %ld seq %ld)\n", 
+		      error, opcode, seq));
+	    return(EINVAL);
+	    }
+	
+	return handleDownCall(opcode, &pbuf);
+    }
+    
+    /* Look for the message on the (waiting for) reply queue. */
+    for (vmp = (struct vmsg *)GETNEXT(vcp->vc_replys);
+	 !EOQ(vmp, vcp->vc_replys);
+	 vmp = (struct vmsg *)GETNEXT(vmp->vm_chain))
+    {
+	if (vmp->vm_unique == seq) break;
+    }
+    
+    if (EOQ(vmp, vcp->vc_replys)) {
+	if (cfsdebug)
+	    myprintf(("vcwrite: msg (%ld, %ld) not found\n", opcode, seq));
+	
+	return(ESRCH);
+	}
+    
+    /* Remove the message from the reply queue */
+    REMQUE(vmp->vm_chain);
+    
+    /* move data into response buffer. */
+    out = (struct cfs_out_hdr *)vmp->vm_data;
+    /* Don't need to copy opcode and uniquifier. */
+    
+    /* get the rest of the data. */
+    if (vmp->vm_outSize < uiop->uio_resid) {
+	myprintf(("vcwrite: more data than asked for (%d < %d)\n",
+		  vmp->vm_outSize, uiop->uio_resid));
+	wakeup(&vmp->vm_sleep); 	/* Notify caller of the error. */
+	return(EINVAL);
+    } 
+    
+    buf[0] = uiop->uio_resid; 	/* Save this value. */
+    uiop->uio_rw = UIO_WRITE;
+    error = uiomove((caddr_t) &out->result, vmp->vm_outSize - (sizeof(int) * 2), uiop);
+    if (error) {
+	myprintf(("vcwrite: error (%d) on uiomove (op %ld seq %ld)\n", 
+		  error, opcode, seq));
+	return(EINVAL);
+    }
+    
+    /* I don't think these are used, but just in case. */
+    /* XXX - aren't these two already correct? -bnoble */
+    out->opcode = opcode;
+    out->unique = seq;
+    vmp->vm_outSize	= buf[0];	/* Amount of data transferred? */
+    vmp->vm_flags |= VM_WRITE;
+    wakeup(&vmp->vm_sleep);
+    
+    return(0);
+}
+
+int
+vc_nb_ioctl(dev, cmd, addr, flag, p) 
+    dev_t         dev;       
+    int           cmd;       
+    caddr_t       addr;      
+    int           flag;      
+    struct proc  *p;
+{
+    ENTRY;
+
+    switch(cmd) {
+    case CFSRESIZE: {
+	struct cfs_resize *data = (struct cfs_resize *)addr;
+	return(cfsnc_resize(data->hashsize, data->heapsize, IS_DOWNCALL));
+	break;
+    }
+    case CFSSTATS:
+	if (cfsnc_use) {
+	    cfsnc_gather_stats();
+	    return(0);
+	} else {
+	    return(ENODEV);
+	}
+	break;
+    case CFSPRINT:
+	if (cfsnc_use) {
+	    print_cfsnc();
+	    return(0);
+	} else {
+	    return(ENODEV);
+	}
+	break;
+    default :
+	return(EINVAL);
+	break;
+    }
+}
+
+#if	defined(NetBSD1_3) || defined(__FreeBSD_version)
+int
+vc_nb_poll(dev, events, p)         
+    dev_t         dev;    
+    int           events;   
+    struct proc  *p;
+{
+    register struct vcomm *vcp;
+    int event_msk = 0;
+
+    ENTRY;
+    
+    if (minor(dev) >= NVCFS || minor(dev) < 0)
+	return(ENXIO);
+    
+    vcp = &cfs_mnttbl[minor(dev)].mi_vcomm;
+    
+    event_msk = events & (POLLIN|POLLRDNORM);
+    if (!event_msk)
+	return(0);
+    
+    if (!EMPTY(vcp->vc_requests))
+	return(events & (POLLIN|POLLRDNORM));
+
+    selrecord(p, &(vcp->vc_selproc));
+    
+    return(0);
+}
+#else
+int
+vc_nb_select(dev, flag, p)         
+    dev_t         dev;    
+    int           flag;   
+    struct proc  *p;
+{
+    register struct vcomm *vcp;
+    
+    ENTRY;
+    
+    if (minor(dev) >= NVCFS || minor(dev) < 0)
+	return(ENXIO);
+    
+    vcp = &cfs_mnttbl[minor(dev)].mi_vcomm;
+    
+    if (flag != FREAD)
+	return(0);
+    
+    if (!EMPTY(vcp->vc_requests))
+	return(1);
+    
+    selrecord(p, &(vcp->vc_selproc));
+    
+    return(0);
+}
+#endif
+
+/*
+ * Statistics
+ */
+struct cfs_clstat cfs_clstat;
+
+/* 
+ * Key question: whether to sleep interuptably or uninteruptably when
+ * waiting for Venus.  The former seems better (cause you can ^C a
+ * job), but then GNU-EMACS completion breaks. Use tsleep with no
+ * timeout, and no longjmp happens. But, when sleeping
+ * "uninterruptibly", we don't get told if it returns abnormally
+ * (e.g. kill -9).  
+ */
+
+/* If you want this to be interruptible, set this to > PZERO */
+int cfscall_sleep = PZERO - 1;
+#ifdef	CTL_C
+int cfs_pcatch = PCATCH;
+#else
+#endif
+
+int
+cfscall(mntinfo, inSize, outSize, buffer) 
+     struct cfs_mntinfo *mntinfo; int inSize; int *outSize; caddr_t buffer;
+{
+	struct vcomm *vcp;
+	struct vmsg *vmp;
+	int error;
+#ifdef	CTL_C
+	struct proc *p = curproc;
+	unsigned int psig_omask = p->p_sigmask;
+	int i;
+#endif
+	if (mntinfo == NULL) {
+	    /* Unlikely, but could be a race condition with a dying warden */
+	    return ENODEV;
+	}
+
+	vcp = &(mntinfo->mi_vcomm);
+	
+	cfs_clstat.ncalls++;
+	cfs_clstat.reqs[((struct cfs_in_hdr *)buffer)->opcode]++;
+
+	if (!VC_OPEN(vcp))
+	    return(ENODEV);
+
+	CFS_ALLOC(vmp,struct vmsg *,sizeof(struct vmsg));
+	/* Format the request message. */
+	vmp->vm_data = buffer;
+	vmp->vm_flags = 0;
+	vmp->vm_inSize = inSize;
+	vmp->vm_outSize 
+	    = *outSize ? *outSize : inSize; /* |buffer| >= inSize */
+	vmp->vm_opcode = ((struct cfs_in_hdr *)buffer)->opcode;
+	vmp->vm_unique = ++vcp->vc_seq;
+	if (cfsdebug)
+	    myprintf(("Doing a call for %d.%d\n", 
+		      vmp->vm_opcode, vmp->vm_unique));
+	
+	/* Fill in the common input args. */
+	((struct cfs_in_hdr *)buffer)->unique = vmp->vm_unique;
+
+	/* Append msg to request queue and poke Venus. */
+	INSQUE(vmp->vm_chain, vcp->vc_requests);
+	selwakeup(&(vcp->vc_selproc));
+
+	/* We can be interrupted while we wait for Venus to process
+	 * our request.  If the interrupt occurs before Venus has read
+	 * the request, we dequeue and return. If it occurs after the
+	 * read but before the reply, we dequeue, send a signal
+	 * message, and return. If it occurs after the reply we ignore
+	 * it. In no case do we want to restart the syscall.  If it
+	 * was interrupted by a venus shutdown (vcclose), return
+	 * ENODEV.  */
+
+	/* Ignore return, We have to check anyway */
+#ifdef	CTL_C
+	/* This is work in progress.  Setting cfs_pcatch lets tsleep reawaken
+	   on a ^c or ^z.  The problem is that emacs sets certain interrupts
+	   as SA_RESTART.  This means that we should exit sleep handle the
+	   "signal" and then go to sleep again.  Mostly this is done by letting
+	   the syscall complete and be restarted.  We are not idempotent and 
+	   can not do this.  A better solution is necessary.
+	 */
+	i = 0;
+	do {
+	    error = tsleep(&vmp->vm_sleep, (cfscall_sleep|cfs_pcatch), "cfscall", hz*2);
+	    if (error == 0)
+	    	break;
+	    else if (error == EWOULDBLOCK) {
+		    printf("cfscall: tsleep TIMEOUT %d sec\n", 2+2*i);
+    	    } else if (p->p_siglist == sigmask(SIGIO)) {
+		    p->p_sigmask |= p->p_siglist;
+		    printf("cfscall: tsleep returns %d SIGIO, cnt %d\n", error, i);
+	    } else {
+		    printf("cfscall: tsleep returns %d, cnt %d\n", error, i);
+		    printf("cfscall: siglist = %x, sigmask = %x, mask %x\n",
+			    p->p_siglist, p->p_sigmask,
+			    p->p_siglist & ~p->p_sigmask);
+		    break;
+		    p->p_sigmask |= p->p_siglist;
+		    printf("cfscall: new mask, siglist = %x, sigmask = %x, mask %x\n",
+			    p->p_siglist, p->p_sigmask,
+			    p->p_siglist & ~p->p_sigmask);
+	    }
+	} while (error && i++ < 128);
+	p->p_sigmask = psig_omask;
+#else
+	(void) tsleep(&vmp->vm_sleep, cfscall_sleep, "cfscall", 0);
+#endif
+	if (VC_OPEN(vcp)) {	/* Venus is still alive */
+ 	/* Op went through, interrupt or not... */
+	    if (vmp->vm_flags & VM_WRITE) {
+		error = 0;
+		*outSize = vmp->vm_outSize;
+	    }
+
+	    else if (!(vmp->vm_flags & VM_READ)) { 
+		/* Interrupted before venus read it. */
+		if (cfsdebug||1)
+		    myprintf(("interrupted before read: op = %d.%d, flags = %x\n",
+			   vmp->vm_opcode, vmp->vm_unique, vmp->vm_flags));
+		REMQUE(vmp->vm_chain);
+		error = EINTR;
+	    }
+	    
+	    else { 	
+		/* (!(vmp->vm_flags & VM_WRITE)) means interrupted after
+                   upcall started */
+		/* Interrupted after start of upcall, send venus a signal */
+		struct cfs_in_hdr *dog;
+		struct vmsg *svmp;
+		
+		if (cfsdebug||1)
+		    myprintf(("Sending Venus a signal: op = %d.%d, flags = %x\n",
+			   vmp->vm_opcode, vmp->vm_unique, vmp->vm_flags));
+		
+		REMQUE(vmp->vm_chain);
+		error = EINTR;
+		
+		CFS_ALLOC(svmp, struct vmsg *, sizeof (struct vmsg));
+
+		CFS_ALLOC((svmp->vm_data), char *, sizeof (struct cfs_in_hdr));
+		dog = (struct cfs_in_hdr *)svmp->vm_data;
+		
+		svmp->vm_flags = 0;
+		dog->opcode = svmp->vm_opcode = CFS_SIGNAL;
+		dog->unique = svmp->vm_unique = vmp->vm_unique;
+		svmp->vm_inSize = sizeof (struct cfs_in_hdr);
+/*??? rvb */	svmp->vm_outSize = sizeof (struct cfs_in_hdr);
+		
+		if (cfsdebug)
+		    myprintf(("cfscall: enqueing signal msg (%d, %d)\n",
+			   svmp->vm_opcode, svmp->vm_unique));
+		
+		/* insert at head of queue! */
+		INSQUE(svmp->vm_chain, vcp->vc_requests);
+		selwakeup(&(vcp->vc_selproc));
+	    }
+	}
+
+	else {	/* If venus died (!VC_OPEN(vcp)) */
+	    if (cfsdebug)
+		myprintf(("vcclose woke op %d.%d flags %d\n",
+		       vmp->vm_opcode, vmp->vm_unique, vmp->vm_flags));
+	    
+		error = ENODEV;
+	}
+
+	CFS_FREE(vmp, sizeof(struct vmsg));
+
+	if (!error)
+		error = ((struct cfs_out_hdr *)buffer)->result;
+	return(error);
+}
diff --git a/sys/fs/coda/coda_subr.c b/sys/fs/coda/coda_subr.c
new file mode 100644
index 0000000..3d20e57
--- /dev/null
+++ b/sys/fs/coda/coda_subr.c
@@ -0,0 +1,750 @@
+/*
+
+            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_subr.c,v 1.11 1998/08/28 18:12:18 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_subr.c,v $
+ * Revision 1.11  1998/08/28 18:12:18  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 17:05:16  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.9  1998/08/18 16:31:41  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.8  98/01/31  20:53:12  rvb
+ * First version that works on FreeBSD 2.2.5
+ * 
+ * Revision 1.7  98/01/23  11:53:42  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.6.2.3  98/01/23  11:21:05  rvb
+ * Sync with 2.2.5
+ * 
+ * Revision 1.6.2.2  97/12/16  12:40:06  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.6.2.1  97/12/06  17:41:21  rvb
+ * Sync with peters coda.h
+ * 
+ * Revision 1.6  97/12/05  10:39:17  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.5.4.8  97/11/26  15:28:58  rvb
+ * Cant make downcall pbuf == union cfs_downcalls yet
+ * 
+ * Revision 1.5.4.7  97/11/20  11:46:42  rvb
+ * Capture current cfs_venus
+ * 
+ * Revision 1.5.4.6  97/11/18  10:27:16  rvb
+ * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
+ * cfs_nb_foo and cfs_foo are joined
+ * 
+ * Revision 1.5.4.5  97/11/13  22:03:00  rvb
+ * pass2 cfs_NetBSD.h mt
+ * 
+ * Revision 1.5.4.4  97/11/12  12:09:39  rvb
+ * reorg pass1
+ * 
+ * Revision 1.5.4.3  97/11/06  21:02:38  rvb
+ * first pass at ^c ^z
+ * 
+ * Revision 1.5.4.2  97/10/29  16:06:27  rvb
+ * Kill DYING
+ * 
+ * Revision 1.5.4.1  97/10/28 23:10:16  rvb
+ * >64Meg; venus can be killed!
+ *
+ * Revision 1.5  97/08/05  11:08:17  lily
+ * Removed cfsnc_replace, replaced it with a cfs_find, unhash, and
+ * rehash.  This fixes a cnode leak and a bug in which the fid is
+ * not actually replaced.  (cfs_namecache.c, cfsnc.h, cfs_subr.c)
+ * 
+ * Revision 1.4  96/12/12  22:10:59  bnoble
+ * Fixed the "downcall invokes venus operation" deadlock in all known cases. 
+ * There may be more
+ * 
+ * Revision 1.3  1996/12/05 16:20:15  bnoble
+ * Minor debugging aids
+ *
+ * Revision 1.2  1996/01/02 16:57:01  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ *
+ * Revision 1.1.2.1  1995/12/20 01:57:27  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 3.1.1.1  1995/03/04  19:07:59  bnoble
+ * Branch for NetBSD port revisions
+ *
+ * Revision 3.1  1995/03/04  19:07:58  bnoble
+ * Bump to major revision 3 to prepare for NetBSD port
+ *
+ * Revision 2.8  1995/03/03  17:00:04  dcs
+ * Fixed kernel bug involving sleep and upcalls. Basically if you killed
+ * a job waiting on venus, the venus upcall queues got trashed. Depending
+ * on luck, you could kill the kernel or not.
+ * (mods to cfs_subr.c and cfs_mach.d)
+ *
+ * Revision 2.7  95/03/02  22:45:21  dcs
+ * Sun4 compatibility
+ * 
+ * Revision 2.6  95/02/17  16:25:17  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 2.5  94/11/09  15:56:26  dcs
+ * Had the thread sleeping on the wrong thing!
+ * 
+ * Revision 2.4  94/10/14  09:57:57  dcs
+ * Made changes 'cause sun4s have braindead compilers
+ * 
+ * Revision 2.3  94/10/12  16:46:26  dcs
+ * Cleaned kernel/venus interface by removing XDR junk, plus
+ * so cleanup to allow this code to be more easily ported.
+ * 
+ * Revision 1.2  92/10/27  17:58:22  lily
+ * merge kernel/latest and alpha/src/cfs
+ * 
+ * Revision 2.4  92/09/30  14:16:26  mja
+ * 	Incorporated Dave Steere's fix for the GNU-Emacs bug.
+ * 	Also, included his cfs_flush routine in place of the former cfsnc_flush.
+ * 	[91/02/07            jjk]
+ * 
+ * 	Added contributors blurb.
+ * 	[90/12/13            jjk]
+ * 
+ * 	Hack to allow users to keep coda venus calls uninterruptible. THis
+ * 	basically prevents the Gnu-emacs bug from appearing, in which a call
+ * 	was being interrupted, and return EINTR, but gnu didn't check for the
+ * 	error and figured the file was buggered.
+ * 	[90/12/09            dcs]
+ * 
+ * Revision 2.3  90/08/10  10:23:20  mrt
+ * 	Removed include of vm/vm_page.h as it no longer exists.
+ * 	[90/08/10            mrt]
+ * 
+ * Revision 2.2  90/07/05  11:26:35  mrt
+ * 	Initialize name cache on first call to vcopen.
+ * 	[90/05/23            dcs]
+ * 
+ * 	Created for the Coda File System.
+ * 	[90/05/23            dcs]
+ * 
+ * Revision 1.5  90/05/31  17:01:35  dcs
+ * Prepare for merge with facilities kernel.
+ * 
+ * Revision 1.2  90/03/19  15:56:25  dcs
+ * Initialize name cache on first call to vcopen.
+ * 
+ * Revision 1.1  90/03/15  10:43:26  jjk
+ * Initial revision
+ * 
+ */ 
+
+/* NOTES: rvb
+ * 1.	Added cfs_unmounting to mark all cnodes as being UNMOUNTING.  This has to
+ *	 be done before dounmount is called.  Because some of the routines that
+ *	 dounmount calls before cfs_unmounted might try to force flushes to venus.
+ *	 The vnode pager does this.
+ * 2.	cfs_unmounting marks all cnodes scanning cfs_cache.
+ * 3.	cfs_checkunmounting (under DEBUG) checks all cnodes by chasing the vnodes
+ *	 under the /coda mount point.
+ * 4.	cfs_cacheprint (under DEBUG) prints names with vnode/cnode address
+ */
+
+#include <vcfs.h>
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/select.h>
+#include <sys/mount.h>
+
+#include <cfs/coda.h>
+#include <cfs/cnode.h>
+#include <cfs/cfs_subr.h>
+#include <cfs/cfsnc.h>
+
+#if	NVCFS
+
+int cfs_active = 0;
+int cfs_reuse = 0;
+int cfs_new = 0;
+
+struct cnode *cfs_freelist = NULL;
+struct cnode *cfs_cache[CFS_CACHESIZE];
+
+#define cfshash(fid) \
+    (((fid)->Volume + (fid)->Vnode) & (CFS_CACHESIZE-1))
+
+#define	CNODE_NEXT(cp)	((cp)->c_next)
+
+#define ODD(vnode)        ((vnode) & 0x1)
+
+/*
+ * Allocate a cnode.
+ */
+struct cnode *
+cfs_alloc(void)
+{
+    struct cnode *cp;
+
+    if (cfs_freelist) {
+	cp = cfs_freelist;
+	cfs_freelist = CNODE_NEXT(cp);
+	cfs_reuse++;
+    }
+    else {
+	CFS_ALLOC(cp, struct cnode *, sizeof(struct cnode));
+	/* NetBSD vnodes don't have any Pager info in them ('cause there are
+	   no external pagers, duh!) */
+#define VNODE_VM_INFO_INIT(vp)         /* MT */
+	VNODE_VM_INFO_INIT(CTOV(cp));
+	cfs_new++;
+    }
+    bzero(cp, sizeof (struct cnode));
+
+    return(cp);
+}
+
+/*
+ * Deallocate a cnode.
+ */
+void
+cfs_free(cp)
+     register struct cnode *cp;
+{
+
+    CNODE_NEXT(cp) = cfs_freelist;
+    cfs_freelist = cp;
+}
+
+/*
+ * Put a cnode in the hash table
+ */
+void
+cfs_save(cp)
+     struct cnode *cp;
+{
+	CNODE_NEXT(cp) = cfs_cache[cfshash(&cp->c_fid)];
+	cfs_cache[cfshash(&cp->c_fid)] = cp;
+}
+
+/*
+ * Remove a cnode from the hash table
+ */
+void
+cfs_unsave(cp)
+     struct cnode *cp;
+{
+    struct cnode *ptr;
+    struct cnode *ptrprev = NULL;
+    
+    ptr = cfs_cache[cfshash(&cp->c_fid)]; 
+    while (ptr != NULL) { 
+	if (ptr == cp) { 
+	    if (ptrprev == NULL) {
+		cfs_cache[cfshash(&cp->c_fid)] 
+		    = CNODE_NEXT(ptr);
+	    } else {
+		CNODE_NEXT(ptrprev) = CNODE_NEXT(ptr);
+	    }
+	    CNODE_NEXT(cp) = (struct cnode *)NULL;
+	    
+	    return; 
+	}	
+	ptrprev = ptr;
+	ptr = CNODE_NEXT(ptr);
+    }	
+}
+
+/*
+ * Lookup a cnode by fid. If the cnode is dying, it is bogus so skip it.
+ * NOTE: this allows multiple cnodes with same fid -- dcs 1/25/95
+ */
+struct cnode *
+cfs_find(fid) 
+     ViceFid *fid;
+{
+    struct cnode *cp;
+
+    cp = cfs_cache[cfshash(fid)];
+    while (cp) {
+	if ((cp->c_fid.Vnode == fid->Vnode) &&
+	    (cp->c_fid.Volume == fid->Volume) &&
+	    (cp->c_fid.Unique == fid->Unique) &&
+	    (!IS_UNMOUNTING(cp)))
+	    {
+		cfs_active++;
+		return(cp); 
+	    }		    
+	cp = CNODE_NEXT(cp);
+    }
+    return(NULL);
+}
+
+/*
+ * cfs_kill is called as a side effect to vcopen. To prevent any
+ * cnodes left around from an earlier run of a venus or warden from
+ * causing problems with the new instance, mark any outstanding cnodes
+ * as dying. Future operations on these cnodes should fail (excepting
+ * cfs_inactive of course!). Since multiple venii/wardens can be
+ * running, only kill the cnodes for a particular entry in the
+ * cfs_mnttbl. -- DCS 12/1/94 */
+
+int
+cfs_kill(whoIam, dcstat)
+	struct mount *whoIam;
+	enum dc_status dcstat;
+{
+	int hash, count = 0;
+	struct cnode *cp;
+	
+	/* 
+	 * Algorithm is as follows: 
+	 *     Second, flush whatever vnodes we can from the name cache.
+	 * 
+	 *     Finally, step through whatever is left and mark them dying.
+	 *        This prevents any operation at all.
+	 */
+	
+	/* This is slightly overkill, but should work. Eventually it'd be
+	 * nice to only flush those entries from the namecache that
+	 * reference a vnode in this vfs.  */
+	cfsnc_flush(dcstat);
+	
+	for (hash = 0; hash < CFS_CACHESIZE; hash++) {
+		for (cp = cfs_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {
+			if (CTOV(cp)->v_mount == whoIam) {
+#ifdef	DEBUG
+				printf("cfs_kill: vp %p, cp %p\n", CTOV(cp), cp);
+#endif
+				count++;
+				CFSDEBUG(CFS_FLUSH, 
+					 myprintf(("Live cnode fid %lx.%lx.%lx flags %d count %d\n",
+						   (cp->c_fid).Volume,
+						   (cp->c_fid).Vnode,
+						   (cp->c_fid).Unique, 
+						   cp->c_flags,
+						   CTOV(cp)->v_usecount)); );
+			}
+		}
+	}
+	return count;
+}
+
+/*
+ * There are two reasons why a cnode may be in use, it may be in the
+ * name cache or it may be executing.  
+ */
+void
+cfs_flush(dcstat)
+	enum dc_status dcstat;
+{
+    int hash;
+    struct cnode *cp;
+    
+    cfs_clstat.ncalls++;
+    cfs_clstat.reqs[CFS_FLUSH]++;
+    
+    cfsnc_flush(dcstat);	    /* flush files from the name cache */
+
+    for (hash = 0; hash < CFS_CACHESIZE; hash++) {
+	for (cp = cfs_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {  
+	    if (!ODD(cp->c_fid.Vnode)) /* only files can be executed */
+		cfs_vmflush(cp);
+	}
+    }
+}
+
+/*
+ * As a debugging measure, print out any cnodes that lived through a
+ * name cache flush.  
+ */
+void
+cfs_testflush(void)
+{
+    int hash;
+    struct cnode *cp;
+    
+    for (hash = 0; hash < CFS_CACHESIZE; hash++) {
+	for (cp = cfs_cache[hash];
+	     cp != NULL;
+	     cp = CNODE_NEXT(cp)) {  
+	    myprintf(("Live cnode fid %lx.%lx.%lx count %d\n",
+		      (cp->c_fid).Volume,(cp->c_fid).Vnode,
+		      (cp->c_fid).Unique, CTOV(cp)->v_usecount));
+	}
+    }
+}
+
+/*
+ *     First, step through all cnodes and mark them unmounting.
+ *         NetBSD kernels may try to fsync them now that venus
+ *         is dead, which would be a bad thing.
+ *
+ */
+void
+cfs_unmounting(whoIam)
+	struct mount *whoIam;
+{	
+	int hash;
+	struct cnode *cp;
+
+	for (hash = 0; hash < CFS_CACHESIZE; hash++) {
+		for (cp = cfs_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {
+			if (CTOV(cp)->v_mount == whoIam) {
+				if (cp->c_flags & (C_LOCKED|C_WANTED)) {
+					printf("cfs_unmounting: Unlocking %p\n", cp);
+					cp->c_flags &= ~(C_LOCKED|C_WANTED);
+					wakeup((caddr_t) cp);
+				}
+				cp->c_flags |= C_UNMOUNTING;
+			}
+		}
+	}
+}
+
+#ifdef	DEBUG
+cfs_checkunmounting(mp)
+	struct mount *mp;
+{	
+	register struct vnode *vp, *nvp;
+	struct cnode *cp;
+	int count = 0, bad = 0;
+loop:
+	for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) {
+		if (vp->v_mount != mp)
+			goto loop;
+		nvp = vp->v_mntvnodes.le_next;
+		cp = VTOC(vp);
+		count++;
+		if (!(cp->c_flags & C_UNMOUNTING)) {
+			bad++;
+			printf("vp %p, cp %p missed\n", vp, cp);
+			cp->c_flags |= C_UNMOUNTING;
+		}
+	}
+}
+
+int
+cfs_cacheprint(whoIam)
+	struct mount *whoIam;
+{	
+	int hash;
+	struct cnode *cp;
+	int count = 0;
+
+	printf("cfs_cacheprint: cfs_ctlvp %p, cp %p", cfs_ctlvp, VTOC(cfs_ctlvp));
+	cfsnc_name(cfs_ctlvp);
+	printf("\n");
+
+	for (hash = 0; hash < CFS_CACHESIZE; hash++) {
+		for (cp = cfs_cache[hash]; cp != NULL; cp = CNODE_NEXT(cp)) {
+			if (CTOV(cp)->v_mount == whoIam) {
+				printf("cfs_cacheprint: vp %p, cp %p", CTOV(cp), cp);
+				cfsnc_name(cp);
+				printf("\n");
+				count++;
+			}
+		}
+	}
+	printf("cfs_cacheprint: count %d\n", count);
+}
+#endif
+
+/*
+ * There are 6 cases where invalidations occur. The semantics of each
+ * is listed here.
+ *
+ * CFS_FLUSH     -- flush all entries from the name cache and the cnode cache.
+ * CFS_PURGEUSER -- flush all entries from the name cache for a specific user
+ *                  This call is a result of token expiration.
+ *
+ * The next two are the result of callbacks on a file or directory.
+ * CFS_ZAPDIR    -- flush the attributes for the dir from its cnode.
+ *                  Zap all children of this directory from the namecache.
+ * CFS_ZAPFILE   -- flush the attributes for a file.
+ *
+ * The fifth is a result of Venus detecting an inconsistent file.
+ * CFS_PURGEFID  -- flush the attribute for the file
+ *                  If it is a dir (odd vnode), purge its 
+ *                  children from the namecache
+ *                  remove the file from the namecache.
+ *
+ * The sixth allows Venus to replace local fids with global ones
+ * during reintegration.
+ *
+ * CFS_REPLACE -- replace one ViceFid with another throughout the name cache 
+ */
+
+int handleDownCall(opcode, out)
+     int opcode; union outputArgs *out;
+{
+    int error;
+
+    /* Handle invalidate requests. */
+    switch (opcode) {
+      case CFS_FLUSH : {
+
+	  cfs_flush(IS_DOWNCALL);
+	  
+	  CFSDEBUG(CFS_FLUSH,cfs_testflush();)    /* print remaining cnodes */
+	      return(0);
+      }
+	
+      case CFS_PURGEUSER : {
+	  cfs_clstat.ncalls++;
+	  cfs_clstat.reqs[CFS_PURGEUSER]++;
+	  
+	  /* XXX - need to prevent fsync's */
+	  cfsnc_purge_user(out->cfs_purgeuser.cred.cr_uid, IS_DOWNCALL);
+	  return(0);
+      }
+	
+      case CFS_ZAPFILE : {
+	  struct cnode *cp;
+
+	  error = 0;
+	  cfs_clstat.ncalls++;
+	  cfs_clstat.reqs[CFS_ZAPFILE]++;
+	  
+	  cp = cfs_find(&out->cfs_zapfile.CodaFid);
+	  if (cp != NULL) {
+	      vref(CTOV(cp));
+	      
+	      cp->c_flags &= ~C_VATTR;
+	      if (CTOV(cp)->v_flag & VTEXT)
+		  error = cfs_vmflush(cp);
+	      CFSDEBUG(CFS_ZAPFILE, myprintf(("zapfile: fid = (%lx.%lx.%lx), 
+                                              refcnt = %d, error = %d\n",
+					      cp->c_fid.Volume, 
+					      cp->c_fid.Vnode, 
+					      cp->c_fid.Unique, 
+					      CTOV(cp)->v_usecount - 1, error)););
+	      if (CTOV(cp)->v_usecount == 1) {
+		  cp->c_flags |= C_PURGING;
+	      }
+	      vrele(CTOV(cp));
+	  }
+	  
+	  return(error);
+      }
+	
+      case CFS_ZAPDIR : {
+	  struct cnode *cp;
+
+	  cfs_clstat.ncalls++;
+	  cfs_clstat.reqs[CFS_ZAPDIR]++;
+	  
+	  cp = cfs_find(&out->cfs_zapdir.CodaFid);
+	  if (cp != NULL) {
+	      vref(CTOV(cp));
+	      
+	      cp->c_flags &= ~C_VATTR;
+	      cfsnc_zapParentfid(&out->cfs_zapdir.CodaFid, IS_DOWNCALL);     
+	      
+	      CFSDEBUG(CFS_ZAPDIR, myprintf(("zapdir: fid = (%lx.%lx.%lx), 
+                                          refcnt = %d\n",cp->c_fid.Volume, 
+					     cp->c_fid.Vnode, 
+					     cp->c_fid.Unique, 
+					     CTOV(cp)->v_usecount - 1)););
+	      if (CTOV(cp)->v_usecount == 1) {
+		  cp->c_flags |= C_PURGING;
+	      }
+	      vrele(CTOV(cp));
+	  }
+	  
+	  return(0);
+      }
+	
+      case CFS_ZAPVNODE : {
+	  cfs_clstat.ncalls++;
+	  cfs_clstat.reqs[CFS_ZAPVNODE]++;
+	  
+	  myprintf(("CFS_ZAPVNODE: Called, but uniplemented\n"));
+	  /*
+	   * Not that below we must really translate the returned coda_cred to
+	   * a netbsd cred.  This is a bit muddled at present and the cfsnc_zapnode
+	   * is further unimplemented, so punt!
+	   * I suppose we could use just the uid.
+	   */
+	  /* cfsnc_zapvnode(&out->cfs_zapvnode.VFid, &out->cfs_zapvnode.cred,
+			 IS_DOWNCALL); */
+	  return(0);
+      }	
+	
+      case CFS_PURGEFID : {
+	  struct cnode *cp;
+
+	  error = 0;
+	  cfs_clstat.ncalls++;
+	  cfs_clstat.reqs[CFS_PURGEFID]++;
+
+	  cp = cfs_find(&out->cfs_purgefid.CodaFid);
+	  if (cp != NULL) {
+	      vref(CTOV(cp));
+	      if (ODD(out->cfs_purgefid.CodaFid.Vnode)) { /* Vnode is a directory */
+		  cfsnc_zapParentfid(&out->cfs_purgefid.CodaFid,
+				     IS_DOWNCALL);     
+	      }
+	      cp->c_flags &= ~C_VATTR;
+	      cfsnc_zapfid(&out->cfs_purgefid.CodaFid, IS_DOWNCALL);
+	      if (!(ODD(out->cfs_purgefid.CodaFid.Vnode)) 
+		  && (CTOV(cp)->v_flag & VTEXT)) {
+		  
+		  error = cfs_vmflush(cp);
+	      }
+	      CFSDEBUG(CFS_PURGEFID, myprintf(("purgefid: fid = (%lx.%lx.%lx), refcnt = %d, error = %d\n",
+                                            cp->c_fid.Volume, cp->c_fid.Vnode,
+                                            cp->c_fid.Unique, 
+					    CTOV(cp)->v_usecount - 1, error)););
+	      if (CTOV(cp)->v_usecount == 1) {
+		  cp->c_flags |= C_PURGING;
+	      }
+	      vrele(CTOV(cp));
+	  }
+	  return(error);
+      }
+
+      case CFS_REPLACE : {
+	  struct cnode *cp = NULL;
+
+	  cfs_clstat.ncalls++;
+	  cfs_clstat.reqs[CFS_REPLACE]++;
+	  
+	  cp = cfs_find(&out->cfs_replace.OldFid);
+	  if (cp != NULL) { 
+	      /* remove the cnode from the hash table, replace the fid, and reinsert */
+	      vref(CTOV(cp));
+	      cfs_unsave(cp);
+	      cp->c_fid = out->cfs_replace.NewFid;
+	      cfs_save(cp);
+
+	      CFSDEBUG(CFS_REPLACE, myprintf(("replace: oldfid = (%lx.%lx.%lx), newfid = (%lx.%lx.%lx), cp = %p\n",
+					   out->cfs_replace.OldFid.Volume,
+					   out->cfs_replace.OldFid.Vnode,
+					   out->cfs_replace.OldFid.Unique,
+					   cp->c_fid.Volume, cp->c_fid.Vnode, 
+					   cp->c_fid.Unique, cp));)
+	      vrele(CTOV(cp));
+	  }
+	  return (0);
+      }
+      default:
+      	myprintf(("handleDownCall: unknown opcode %d\n", opcode));
+	return (EINVAL);
+    }
+}
+
+/* cfs_grab_vnode: lives in either cfs_mach.c or cfs_nbsd.c */
+
+int
+cfs_vmflush(cp)
+     struct cnode *cp;
+{
+#if	0
+  /* old code */
+    /* Unset <device, inode> so that page_read doesn't try to use
+       (possibly) invalid cache file. */
+    cp->c_device = 0;
+    cp->c_inode = 0;
+
+    return(inode_uncache_try(VTOI(CTOV(cp))) ? 0 : ETXTBSY);
+#else /* __NetBSD__ || __FreeBSD__ */
+    return 0;
+#endif /* __NetBSD__ || __FreeBSD__ */
+}
+
+
+/* 
+ * kernel-internal debugging switches
+ */
+
+void cfs_debugon(void)
+{
+    cfsdebug = -1;
+    cfsnc_debug = -1;
+    cfs_vnop_print_entry = 1;
+    cfs_psdev_print_entry = 1;
+    cfs_vfsop_print_entry = 1;
+}
+
+void cfs_debugoff(void)
+{
+    cfsdebug = 0;
+    cfsnc_debug = 0;
+    cfs_vnop_print_entry = 0;
+    cfs_psdev_print_entry = 0;
+    cfs_vfsop_print_entry = 0;
+}
+
+/*
+ * Utilities used by both client and server
+ * Standard levels:
+ * 0) no debugging
+ * 1) hard failures
+ * 2) soft failures
+ * 3) current test software
+ * 4) main procedure entry points
+ * 5) main procedure exit points
+ * 6) utility procedure entry points
+ * 7) utility procedure exit points
+ * 8) obscure procedure entry points
+ * 9) obscure procedure exit points
+ * 10) random stuff
+ * 11) all <= 1
+ * 12) all <= 2
+ * 13) all <= 3
+ * ...
+ */
+
+
+#endif	/* NVCFS */
diff --git a/sys/fs/coda/coda_subr.h b/sys/fs/coda/coda_subr.h
new file mode 100644
index 0000000..cf983d4
--- /dev/null
+++ b/sys/fs/coda/coda_subr.h
@@ -0,0 +1,45 @@
+/*
+
+            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_subr.h,v 1.4 1998/08/18 17:05:16 rvb Exp $ */
+
+struct cnode *cfs_alloc(void);
+void  cfs_free(struct cnode *cp);
+struct cnode *cfs_find(ViceFid *fid);
+void cfs_flush(enum dc_status dcstat);
+void cfs_testflush(void);
+int  cfs_checkunmounting(struct mount *mp);
+int  cfs_cacheprint(struct mount *whoIam);
+void cfs_debugon(void);
+void cfs_debugoff(void);
+int  cfs_kill(struct mount *whoIam, enum dc_status dcstat);
+void cfs_save(struct cnode *cp);
+void cfs_unsave(struct cnode *cp);
+
+
diff --git a/sys/fs/coda/coda_venus.c b/sys/fs/coda/coda_venus.c
new file mode 100644
index 0000000..8767914
--- /dev/null
+++ b/sys/fs/coda/coda_venus.c
@@ -0,0 +1,654 @@
+/*
+
+            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_venus.c,v 1.11 1998/08/28 18:12:20 rvb Exp $ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/proc.h>
+#include <sys/select.h>
+#ifdef	__FreeBSD_version
+#include <sys/ioccom.h>
+#else
+#include <sys/ioctl.h>
+#endif
+/* for CNV_OFLAGS below */
+#include <sys/fcntl.h>
+
+#include <cfs/coda.h>
+#include <cfs/cnode.h>
+#include <cfs/cfs_venus.h>
+#include <cfs/pioctl.h>
+
+#define DECL_NO_IN(name) 				\
+    struct cfs_in_hdr *inp;				\
+    struct name ## _out *outp;				\
+    int name ## _size = sizeof (struct cfs_in_hdr);	\
+    int Isize = sizeof (struct cfs_in_hdr);		\
+    int Osize = sizeof (struct name ## _out);		\
+    int error
+
+#define DECL(name)					\
+    struct name ## _in *inp;				\
+    struct name ## _out *outp;				\
+    int name ## _size = sizeof (struct name ## _in);	\
+    int Isize = sizeof (struct name ## _in);		\
+    int Osize = sizeof (struct name ## _out);		\
+    int error
+
+#define DECL_NO_OUT(name)				\
+    struct name ## _in *inp;				\
+    struct cfs_out_hdr *outp;				\
+    int name ## _size = sizeof (struct name ## _in);	\
+    int Isize = sizeof (struct name ## _in);		\
+    int Osize = sizeof (struct cfs_out_hdr);		\
+    int error
+
+#define ALLOC_NO_IN(name)				\
+    if (Osize > name ## _size)				\
+    	name ## _size = Osize;				\
+    CFS_ALLOC(inp, struct cfs_in_hdr *, name ## _size);\
+    outp = (struct name ## _out *) inp
+
+#define ALLOC(name)					\
+    if (Osize > name ## _size)				\
+    	name ## _size = Osize;				\
+    CFS_ALLOC(inp, struct name ## _in *, name ## _size);\
+    outp = (struct name ## _out *) inp
+
+#define ALLOC_NO_OUT(name)				\
+    if (Osize > name ## _size)				\
+    	name ## _size = Osize;				\
+    CFS_ALLOC(inp, struct name ## _in *, name ## _size);\
+    outp = (struct cfs_out_hdr *) inp
+
+#define STRCPY(struc, name, len) \
+    bcopy(name, (char *)inp + (int)inp->struc, len); \
+    ((char*)inp + (int)inp->struc)[len++] = 0; \
+    Isize += len
+
+#define INIT_IN(in, op, ident, p) \
+	  (in)->opcode = (op); \
+	  (in)->pid = p ? p->p_pid : -1; \
+          (in)->pgid = p ? p->p_pgid : -1; \
+          (in)->sid = (p && p->p_session && p->p_session->s_leader) ? (p->p_session->s_leader->p_pid) : -1; \
+          if (ident != NOCRED) {                              \
+	      (in)->cred.cr_uid = ident->cr_uid;              \
+	      (in)->cred.cr_groupid = ident->cr_gid;          \
+          } else {                                            \
+	      bzero(&((in)->cred),sizeof(struct coda_cred));  \
+	      (in)->cred.cr_uid = -1;                         \
+	      (in)->cred.cr_groupid = -1;                     \
+          }                                                   \
+
+#define	CNV_OFLAG(to, from) 				\
+    do { 						\
+	  to = 0;					\
+	  if (from & FREAD)   to |= C_O_READ; 		\
+	  if (from & FWRITE)  to |= C_O_WRITE; 		\
+	  if (from & O_TRUNC) to |= C_O_TRUNC; 		\
+	  if (from & O_EXCL)  to |= C_O_EXCL; 		\
+    } while (0)
+
+#define CNV_VV2V_ATTR(top, fromp) \
+	do { \
+		(top)->va_type = (fromp)->va_type; \
+		(top)->va_mode = (fromp)->va_mode; \
+		(top)->va_nlink = (fromp)->va_nlink; \
+		(top)->va_uid = (fromp)->va_uid; \
+		(top)->va_gid = (fromp)->va_gid; \
+		(top)->va_fsid = VNOVAL; \
+		(top)->va_fileid = (fromp)->va_fileid; \
+		(top)->va_size = (fromp)->va_size; \
+		(top)->va_blocksize = (fromp)->va_blocksize; \
+		(top)->va_atime = (fromp)->va_atime; \
+		(top)->va_mtime = (fromp)->va_mtime; \
+		(top)->va_ctime = (fromp)->va_ctime; \
+		(top)->va_gen = (fromp)->va_gen; \
+		(top)->va_flags = (fromp)->va_flags; \
+		(top)->va_rdev = (fromp)->va_rdev; \
+		(top)->va_bytes = (fromp)->va_bytes; \
+		(top)->va_filerev = (fromp)->va_filerev; \
+		(top)->va_vaflags = VNOVAL; \
+		(top)->va_spare = VNOVAL; \
+	} while (0)
+
+#define CNV_V2VV_ATTR(top, fromp) \
+	do { \
+		(top)->va_type = (fromp)->va_type; \
+		(top)->va_mode = (fromp)->va_mode; \
+		(top)->va_nlink = (fromp)->va_nlink; \
+		(top)->va_uid = (fromp)->va_uid; \
+		(top)->va_gid = (fromp)->va_gid; \
+		(top)->va_fileid = (fromp)->va_fileid; \
+		(top)->va_size = (fromp)->va_size; \
+		(top)->va_blocksize = (fromp)->va_blocksize; \
+		(top)->va_atime = (fromp)->va_atime; \
+		(top)->va_mtime = (fromp)->va_mtime; \
+		(top)->va_ctime = (fromp)->va_ctime; \
+		(top)->va_gen = (fromp)->va_gen; \
+		(top)->va_flags = (fromp)->va_flags; \
+		(top)->va_rdev = (fromp)->va_rdev; \
+		(top)->va_bytes = (fromp)->va_bytes; \
+		(top)->va_filerev = (fromp)->va_filerev; \
+	} while (0)
+
+
+int
+venus_root(void *mdp,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid)
+{
+    DECL_NO_IN(cfs_root);		/* sets Isize & Osize */
+    ALLOC_NO_IN(cfs_root);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(inp, CFS_ROOT, cred, p);  
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error)
+	*VFid = outp->VFid;
+
+    CFS_FREE(inp, cfs_root_size);
+    return error;
+}
+
+int
+venus_open(void *mdp, ViceFid *fid, int flag,
+	struct ucred *cred, struct proc *p,
+/*out*/	dev_t *dev, ino_t *inode)
+{
+    int cflag;
+    DECL(cfs_open);			/* sets Isize & Osize */
+    ALLOC(cfs_open);			/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_OPEN, cred, p);
+    inp->VFid = *fid;
+    CNV_OFLAG(cflag, flag);
+    inp->flags = cflag;
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	*dev =  outp->dev;
+	*inode = outp->inode;
+    }
+
+    CFS_FREE(inp, cfs_open_size);
+    return error;
+}
+
+int
+venus_close(void *mdp, ViceFid *fid, int flag,
+	struct ucred *cred, struct proc *p)
+{
+    int cflag;
+    DECL_NO_OUT(cfs_close);		/* sets Isize & Osize */
+    ALLOC_NO_OUT(cfs_close);		/* sets inp & outp */
+
+    INIT_IN(&inp->ih, CFS_CLOSE, cred, p);
+    inp->VFid = *fid;
+    CNV_OFLAG(cflag, flag);
+    inp->flags = cflag;
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_close_size);
+    return error;
+}
+
+/*
+ * these two calls will not exist!!!  the container file is read/written
+ * directly.
+ */
+void
+venus_read(void)
+{
+}
+
+void
+venus_write(void)
+{
+}
+
+/*
+ * this is a bit sad too.  the ioctl's are for the control file, not for
+ * normal files.
+ */
+int
+venus_ioctl(void *mdp, ViceFid *fid,
+	int com, int flag, caddr_t data,
+	struct ucred *cred, struct proc *p)
+{
+    DECL(cfs_ioctl);			/* sets Isize & Osize */
+    struct PioctlData *iap = (struct PioctlData *)data;
+    int tmp;
+
+    cfs_ioctl_size = VC_MAXMSGSIZE;
+    ALLOC(cfs_ioctl);			/* sets inp & outp */
+
+    INIT_IN(&inp->ih, CFS_IOCTL, cred, p);
+    inp->VFid = *fid;
+
+    /* command was mutated by increasing its size field to reflect the  
+     * path and follow args. we need to subtract that out before sending
+     * the command to venus.
+     */
+    inp->cmd = (com & ~(IOCPARM_MASK << 16));
+    tmp = ((com >> 16) & IOCPARM_MASK) - sizeof (char *) - sizeof (int);
+    inp->cmd |= (tmp & IOCPARM_MASK) <<	16;
+
+    inp->rwflag = flag;
+    inp->len = iap->vi.in_size;
+    inp->data = (char *)(sizeof (struct cfs_ioctl_in));
+
+    error = copyin(iap->vi.in, (char*)inp + (int)inp->data, 
+		   iap->vi.in_size);
+    if (error) {
+	CFS_FREE(inp, cfs_ioctl_size);
+	return(error);
+    }
+
+    Osize = VC_MAXMSGSIZE;
+    error = cfscall(mdp, Isize + iap->vi.in_size, &Osize, (char *)inp);
+
+	/* copy out the out buffer. */
+    if (!error) {
+	if (outp->len > iap->vi.out_size) {
+	    error = EINVAL;
+	} else {
+	    error = copyout((char *)outp + (int)outp->data, 
+			    iap->vi.out, iap->vi.out_size);
+	}
+    }
+
+    CFS_FREE(inp, cfs_ioctl_size);
+    return error;
+}
+
+int
+venus_getattr(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p,
+/*out*/	struct vattr *vap)
+{
+    DECL(cfs_getattr);			/* sets Isize & Osize */
+    ALLOC(cfs_getattr);			/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_GETATTR, cred, p);
+    inp->VFid = *fid;
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	CNV_VV2V_ATTR(vap, &outp->attr);
+    }
+
+    CFS_FREE(inp, cfs_getattr_size);
+    return error;
+}
+
+int
+venus_setattr(void *mdp, ViceFid *fid, struct vattr *vap,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_setattr);		/* sets Isize & Osize */
+    ALLOC_NO_OUT(cfs_setattr);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_SETATTR, cred, p);
+    inp->VFid = *fid;
+    CNV_V2VV_ATTR(&inp->attr, vap);
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_setattr_size);
+    return error;
+}
+
+int
+venus_access(void *mdp, ViceFid *fid, int mode,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_access);		/* sets Isize & Osize */
+    ALLOC_NO_OUT(cfs_access);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_ACCESS, cred, p);
+    inp->VFid = *fid;
+#ifdef	NetBSD1_3
+    inp->flags = mode;
+#else
+    inp->flags = mode>>6;
+#endif
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_access_size);
+    return error;
+}
+
+int
+venus_readlink(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p,
+/*out*/	char **str, int *len)
+{
+    DECL(cfs_readlink);			/* sets Isize & Osize */
+    cfs_readlink_size += CFS_MAXPATHLEN;
+    ALLOC(cfs_readlink);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_READLINK, cred, p);
+    inp->VFid = *fid;
+
+    Osize += CFS_MAXPATHLEN;
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	    CFS_ALLOC(*str, char *, outp->count);
+	    *len = outp->count;
+	    bcopy((char *)outp + (int)outp->data, *str, *len);
+    }
+
+    CFS_FREE(inp, cfs_readlink_size);
+    return error;
+}
+
+int
+venus_fsync(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_fsync);		/* sets Isize & Osize */
+    ALLOC_NO_OUT(cfs_fsync);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_FSYNC, cred, p);
+    inp->VFid = *fid;
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_fsync_size);
+    return error;
+}
+
+int
+venus_lookup(void *mdp, ViceFid *fid,
+    	const char *nm, int len,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, int *vtype)
+{
+    DECL(cfs_lookup);			/* sets Isize & Osize */
+    cfs_lookup_size += len + 1;
+    ALLOC(cfs_lookup);			/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_LOOKUP, cred, p);
+    inp->VFid = *fid;
+
+    inp->name = Isize;
+    STRCPY(name, nm, len);		/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	*VFid = outp->VFid;
+	*vtype = outp->vtype;
+    }
+
+    CFS_FREE(inp, cfs_lookup_size);
+    return error;
+}
+
+int
+venus_create(void *mdp, ViceFid *fid,
+    	const char *nm, int len, int exclusive, int mode, struct vattr *va,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, struct vattr *attr)
+{
+    DECL(cfs_create);			/* sets Isize & Osize */
+    cfs_create_size += len + 1;
+    ALLOC(cfs_create);			/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_CREATE, cred, p);
+    inp->VFid = *fid;
+    inp->excl = exclusive ? C_O_EXCL : 0;
+#ifdef	NetBSD1_3
+    inp->mode = mode<<6;
+#else
+    inp->mode = mode;
+#endif
+    CNV_V2VV_ATTR(&inp->attr, va);
+
+    inp->name = Isize;
+    STRCPY(name, nm, len);		/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	*VFid = outp->VFid;
+	CNV_VV2V_ATTR(attr, &outp->attr);
+    }
+
+    CFS_FREE(inp, cfs_create_size);
+    return error;
+}
+
+int
+venus_remove(void *mdp, ViceFid *fid,
+        const char *nm, int len,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_remove);		/* sets Isize & Osize */
+    cfs_remove_size += len + 1;
+    ALLOC_NO_OUT(cfs_remove);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_REMOVE, cred, p);
+    inp->VFid = *fid;
+
+    inp->name = Isize;
+    STRCPY(name, nm, len);		/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_remove_size);
+    return error;
+}
+
+int
+venus_link(void *mdp, ViceFid *fid, ViceFid *tfid,
+        const char *nm, int len,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_link);		/* sets Isize & Osize */
+    cfs_link_size += len + 1;
+    ALLOC_NO_OUT(cfs_link);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_LINK, cred, p);
+    inp->sourceFid = *fid;
+    inp->destFid = *tfid;
+
+    inp->tname = Isize;
+    STRCPY(tname, nm, len);		/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_link_size);
+    return error;
+}
+
+int
+venus_rename(void *mdp, ViceFid *fid, ViceFid *tfid,
+        const char *nm, int len, const char *tnm, int tlen,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_rename);		/* sets Isize & Osize */
+    cfs_rename_size += len + 1 + tlen + 1;
+    ALLOC_NO_OUT(cfs_rename);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_RENAME, cred, p);
+    inp->sourceFid = *fid;
+    inp->destFid = *tfid;
+
+    inp->srcname = Isize;
+    STRCPY(srcname, nm, len);		/* increments Isize */
+
+    inp->destname = Isize;
+    STRCPY(destname, tnm, tlen);	/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_rename_size);
+    return error;
+}
+
+int
+venus_mkdir(void *mdp, ViceFid *fid,
+    	const char *nm, int len, struct vattr *va,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, struct vattr *ova)
+{
+    DECL(cfs_mkdir);			/* sets Isize & Osize */
+    cfs_mkdir_size += len + 1;
+    ALLOC(cfs_mkdir);			/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_MKDIR, cred, p);
+    inp->VFid = *fid;
+    CNV_V2VV_ATTR(&inp->attr, va);
+
+    inp->name = Isize;
+    STRCPY(name, nm, len);		/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	*VFid = outp->VFid;
+	CNV_VV2V_ATTR(ova, &outp->attr);
+    }
+
+    CFS_FREE(inp, cfs_mkdir_size);
+    return error;
+}
+
+int
+venus_rmdir(void *mdp, ViceFid *fid,
+    	const char *nm, int len,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_rmdir);		/* sets Isize & Osize */
+    cfs_rmdir_size += len + 1;
+    ALLOC_NO_OUT(cfs_rmdir);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_RMDIR, cred, p);
+    inp->VFid = *fid;
+
+    inp->name = Isize;
+    STRCPY(name, nm, len);		/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_rmdir_size);
+    return error;
+}
+
+int
+venus_symlink(void *mdp, ViceFid *fid,
+        const char *lnm, int llen, const char *nm, int len, struct vattr *va,
+	struct ucred *cred, struct proc *p)
+{
+    DECL_NO_OUT(cfs_symlink);		/* sets Isize & Osize */
+    cfs_symlink_size += llen + 1 + len + 1;
+    ALLOC_NO_OUT(cfs_symlink);		/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_SYMLINK, cred, p);
+    inp->VFid = *fid;
+    CNV_V2VV_ATTR(&inp->attr, va);
+
+    inp->srcname = Isize;
+    STRCPY(srcname, lnm, llen);		/* increments Isize */
+
+    inp->tname = Isize;
+    STRCPY(tname, nm, len);		/* increments Isize */
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+
+    CFS_FREE(inp, cfs_symlink_size);
+    return error;
+}
+
+int
+venus_readdir(void *mdp, ViceFid *fid,
+    	int count, int offset,
+	struct ucred *cred, struct proc *p,
+/*out*/	char *buffer, int *len)
+{
+    DECL(cfs_readdir);			/* sets Isize & Osize */
+    cfs_readdir_size = VC_MAXMSGSIZE;
+    ALLOC(cfs_readdir);			/* sets inp & outp */
+
+    /* send the open to venus. */
+    INIT_IN(&inp->ih, CFS_READDIR, cred, p);
+    inp->VFid = *fid;
+    inp->count = count;
+    inp->offset = offset;
+
+    Osize = VC_MAXMSGSIZE;
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	bcopy((char *)outp + (int)outp->data, buffer, outp->size);
+	*len = outp->size;
+    }
+
+    CFS_FREE(inp, cfs_readdir_size);
+    return error;
+}
+
+int
+venus_fhtovp(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, int *vtype)
+{
+    DECL(cfs_vget);			/* sets Isize & Osize */
+    ALLOC(cfs_vget);			/* sets inp & outp */
+
+    /* Send the open to Venus. */
+    INIT_IN(&inp->ih, CFS_VGET, cred, p);
+    inp->VFid = *fid;
+
+    error = cfscall(mdp, Isize, &Osize, (char *)inp);
+    if (!error) {
+	*VFid = outp->VFid;
+	*vtype = outp->vtype;
+    }
+
+    CFS_FREE(inp, cfs_vget_size);
+    return error;
+}
diff --git a/sys/fs/coda/coda_venus.h b/sys/fs/coda/coda_venus.h
new file mode 100644
index 0000000..19c95e7
--- /dev/null
+++ b/sys/fs/coda/coda_venus.h
@@ -0,0 +1,131 @@
+/*
+
+            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_venus.h,v 1.4 1998/08/18 17:05:18 rvb Exp $ */
+
+int
+venus_root(void *mdp,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid);
+
+int
+venus_open(void *mdp, ViceFid *fid, int flag,
+	struct ucred *cred, struct proc *p,
+/*out*/	dev_t *dev, ino_t *inode);
+
+int
+venus_close(void *mdp, ViceFid *fid, int flag,
+	struct ucred *cred, struct proc *p);
+
+void
+venus_read(void);
+
+void
+venus_write(void);
+
+int
+venus_ioctl(void *mdp, ViceFid *fid,
+	int com, int flag, caddr_t data,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_getattr(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p,
+/*out*/	struct vattr *vap);
+
+int
+venus_setattr(void *mdp, ViceFid *fid, struct vattr *vap,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_access(void *mdp, ViceFid *fid, int mode,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_readlink(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p,
+/*out*/	char **str, int *len);
+
+int
+venus_fsync(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_lookup(void *mdp, ViceFid *fid,
+    	const char *nm, int len,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, int *vtype);
+
+int
+venus_create(void *mdp, ViceFid *fid,
+    	const char *nm, int len, int exclusive, int mode, struct vattr *va,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, struct vattr *attr);
+
+int
+venus_remove(void *mdp, ViceFid *fid,
+        const char *nm, int len,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_link(void *mdp, ViceFid *fid, ViceFid *tfid,
+        const char *nm, int len,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_rename(void *mdp, ViceFid *fid, ViceFid *tfid,
+        const char *nm, int len, const char *tnm, int tlen,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_mkdir(void *mdp, ViceFid *fid,
+    	const char *nm, int len, struct vattr *va,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, struct vattr *ova);
+
+int
+venus_rmdir(void *mdp, ViceFid *fid,
+    	const char *nm, int len,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_symlink(void *mdp, ViceFid *fid,
+        const char *lnm, int llen, const char *nm, int len, struct vattr *va,
+	struct ucred *cred, struct proc *p);
+
+int
+venus_readdir(void *mdp, ViceFid *fid,
+    	int count, int offset,
+	struct ucred *cred, struct proc *p,
+/*out*/	char *buffer, int *len);
+
+int
+venus_fhtovp(void *mdp, ViceFid *fid,
+	struct ucred *cred, struct proc *p,
+/*out*/	ViceFid *VFid, int *vtype);
diff --git a/sys/fs/coda/coda_vfsops.c b/sys/fs/coda/coda_vfsops.c
new file mode 100644
index 0000000..d44533a
--- /dev/null
+++ b/sys/fs/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); 
+}
diff --git a/sys/fs/coda/coda_vfsops.h b/sys/fs/coda/coda_vfsops.h
new file mode 100644
index 0000000..9f8e777
--- /dev/null
+++ b/sys/fs/coda/coda_vfsops.h
@@ -0,0 +1,78 @@
+/*
+
+            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.h,v 1.9 1998/08/28 18:12:22 rvb Exp $ */
+
+/*
+ * cfid structure:
+ * This overlays the fid structure (see vfs.h)
+ * Only used below and will probably go away.
+ */
+
+struct cfid {
+    u_short	cfid_len;
+    u_short     padding;
+    ViceFid	cfid_fid;
+};
+
+
+struct mount;
+
+int cfs_vfsopstats_init(void);
+#ifdef	NetBSD1_3
+int cfs_mount(struct mount *, const char *, void *, struct nameidata *, 
+		       struct proc *);
+#else
+int cfs_mount(struct mount *, char *, caddr_t, struct nameidata *, 
+		       struct proc *);
+#endif
+int cfs_start(struct mount *, int, struct proc *);
+int cfs_unmount(struct mount *, int, struct proc *);
+int cfs_root(struct mount *, struct vnode **);
+int cfs_quotactl(struct mount *, int, uid_t, caddr_t, struct proc *);
+int cfs_nb_statfs(struct mount *, struct statfs *, struct proc *);
+int cfs_sync(struct mount *, int, struct ucred *, struct proc *);
+int cfs_vget(struct mount *, ino_t, struct vnode **);
+int cfs_fhtovp(struct mount *, struct fid *, struct mbuf *, struct vnode **,
+		       int *, struct ucred **);
+int cfs_vptofh(struct vnode *, struct fid *);
+#ifdef	__NetBSD__
+void cfs_init(void);
+#elif defined(__FreeBSD__)
+#ifdef	__FreeBSD_version
+int cfs_init(struct vfsconf *vfsp);
+#else
+int cfs_init(void);
+#endif
+#endif
+#if	defined(__NetBSD__) && defined(NetBSD1_3) && (NetBSD1_3 >= 7)
+int cfs_sysctl(int *, u_int, void *, size_t *, void *, size_t,
+		    struct proc *);
+#endif
+int getNewVnode(struct vnode **vpp);
diff --git a/sys/fs/coda/coda_vnops.c b/sys/fs/coda/coda_vnops.c
new file mode 100644
index 0000000..69197d7
--- /dev/null
+++ b/sys/fs/coda/coda_vnops.c
@@ -0,0 +1,2802 @@
+/*
+
+            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_vnodeops.c,v 1.12 1998/08/28 18:28:00 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1990 Carnegie-Mellon University
+ * 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_vnodeops.c,v $
+ * Revision 1.12  1998/08/28 18:28:00  rvb
+ * NetBSD -current is stricter!
+ *
+ * Revision 1.11  1998/08/28 18:12:23  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 17:05:21  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.9  1998/08/18 16:31:46  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.8  98/02/24  22:22:50  rvb
+ * Fixes up mainly to flush iopen and friends
+ * 
+ * Revision 1.7  98/01/31  20:53:15  rvb
+ * First version that works on FreeBSD 2.2.5
+ * 
+ * Revision 1.6  98/01/23  11:53:47  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.5.2.8  98/01/23  11:21:11  rvb
+ * Sync with 2.2.5
+ * 
+ * Revision 1.5.2.7  97/12/19  14:26:08  rvb
+ * session id
+ * 
+ * Revision 1.5.2.6  97/12/16  22:01:34  rvb
+ * Oops add cfs_subr.h cfs_venus.h; sync with peter
+ * 
+ * Revision 1.5.2.5  97/12/16  12:40:14  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.5.2.4  97/12/10  14:08:31  rvb
+ * Fix O_ flags; check result in cfscall
+ * 
+ * Revision 1.5.2.3  97/12/10  11:40:27  rvb
+ * No more ody
+ * 
+ * Revision 1.5.2.2  97/12/09  16:07:15  rvb
+ * Sync with vfs/include/coda.h
+ * 
+ * Revision 1.5.2.1  97/12/06  17:41:25  rvb
+ * Sync with peters coda.h
+ * 
+ * Revision 1.5  97/12/05  10:39:23  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.4.14.10  97/11/25  08:08:48  rvb
+ * cfs_venus ... done; until cred/vattr change
+ * 
+ * Revision 1.4.14.9  97/11/24  15:44:48  rvb
+ * Final cfs_venus.c w/o macros, but one locking bug
+ * 
+ * Revision 1.4.14.8  97/11/21  11:28:04  rvb
+ * cfs_venus.c is done: first pass
+ * 
+ * Revision 1.4.14.7  97/11/20  11:46:51  rvb
+ * Capture current cfs_venus
+ * 
+ * Revision 1.4.14.6  97/11/18  10:27:19  rvb
+ * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c
+ * cfs_nb_foo and cfs_foo are joined
+ * 
+ * Revision 1.4.14.5  97/11/13  22:03:03  rvb
+ * pass2 cfs_NetBSD.h mt
+ * 
+ * Revision 1.4.14.4  97/11/12  12:09:42  rvb
+ * reorg pass1
+ * 
+ * Revision 1.4.14.3  97/11/06  21:03:28  rvb
+ * don't include headers in headers
+ * 
+ * Revision 1.4.14.2  97/10/29  16:06:30  rvb
+ * Kill DYING
+ * 
+ * Revision 1.4.14.1  1997/10/28 23:10:18  rvb
+ * >64Meg; venus can be killed!
+ *
+ * Revision 1.4  1997/02/20 13:54:50  lily
+ * check for NULL return from cfsnc_lookup before CTOV
+ *
+ * Revision 1.3  1996/12/12 22:11:02  bnoble
+ * Fixed the "downcall invokes venus operation" deadlock in all known cases.
+ * There may be more
+ *
+ * Revision 1.2  1996/01/02 16:57:07  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ *
+ * Revision 1.1.2.1  1995/12/20 01:57:34  bnoble
+ * Added CFS-specific files
+ *
+ * Revision 3.1.1.1  1995/03/04  19:08:06  bnoble
+ * Branch for NetBSD port revisions
+ *
+ * Revision 3.1  1995/03/04  19:08:04  bnoble
+ * Bump to major revision 3 to prepare for NetBSD port
+ *
+ * Revision 2.6  1995/02/17  16:25:26  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 2.5  94/11/09  20:29:27  dcs
+ * Small bug in remove dealing with hard links and link counts was fixed.
+ * 
+ * Revision 2.4  94/10/14  09:58:42  dcs
+ * Made changes 'cause sun4s have braindead compilers
+ * 
+ * Revision 2.3  94/10/12  16:46:37  dcs
+ * Cleaned kernel/venus interface by removing XDR junk, plus
+ * so cleanup to allow this code to be more easily ported.
+ * 
+ * Revision 2.2  94/09/20  14:12:41  dcs
+ * Fixed bug in rename when moving a directory.
+ * 
+ * Revision 2.1  94/07/21  16:25:22  satya
+ * Conversion to C++ 3.0; start of Coda Release 2.0
+ * 
+ * Revision 1.4  93/12/17  01:38:01  luqi
+ * Changes made for kernel to pass process info to Venus:
+ * 
+ * (1) in file cfs.h
+ * add process id and process group id in most of the cfs argument types.
+ * 
+ * (2) in file cfs_vnodeops.c
+ * add process info passing in most of the cfs vnode operations.
+ * 
+ * (3) in file cfs_xdr.c
+ * expand xdr routines according changes in (1). 
+ * add variable pass_process_info to allow venus for kernel version checking.
+ * 
+ * Revision 1.3  93/05/28  16:24:33  bnoble
+ * *** empty log message ***
+ * 
+ * Revision 1.2  92/10/27  17:58:25  lily
+ * merge kernel/latest and alpha/src/cfs
+ * 
+ * Revision 2.4  92/09/30  14:16:37  mja
+ * 	Redid buffer allocation so that it does kmem_{alloc,free} for all
+ * 	architectures.  Zone allocation, previously used on the 386, caused
+ * 	panics if it was invoked repeatedly.  Stack allocation, previously
+ * 	used on all other architectures, tickled some Mach bug that appeared
+ * 	with large stack frames.
+ * 	[91/02/09            jjk]
+ * 
+ * 	Added contributors blurb.
+ * 	[90/12/13            jjk]
+ * 
+ * Revision 2.3  90/07/26  15:50:09  mrt
+ * 	    Fixed fix to rename to remove .. from moved directories.
+ * 	[90/06/28            dcs]
+ * 
+ * Revision 1.7  90/06/28  16:24:25  dcs
+ * Fixed bug with moving directories, we weren't flushing .. for the moved directory.
+ * 
+ * Revision 1.6  90/05/31  17:01:47  dcs
+ * Prepare for merge with facilities kernel.
+ * 
+ * 
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/errno.h>
+#include <sys/acct.h>
+#include <sys/file.h>
+#include <sys/uio.h>
+#include <sys/namei.h>
+#ifdef	__FreeBSD_version
+#include <sys/ioccom.h>
+#else
+#include <sys/ioctl.h>
+#endif
+#include <sys/mount.h>
+#include <sys/proc.h>
+#include <sys/select.h>
+#ifdef	__NetBSD__
+#include <sys/user.h>
+#endif
+#include <vm/vm.h>
+#ifdef	NetBSD1_3
+#include <miscfs/genfs/genfs.h>
+#endif
+
+#ifdef	__FreeBSD__
+#include <vm/vm_object.h>
+#include <vm/vm_extern.h>
+#ifdef	__FreeBSD_version
+#include <sys/fcntl.h>
+#endif
+#endif
+
+#include <cfs/coda.h>
+#include <cfs/cnode.h>
+#include <cfs/cfs_vnodeops.h>
+#include <cfs/cfs_venus.h>
+#include <cfs/coda_opstats.h>
+#include <cfs/cfs_subr.h>
+#include <cfs/cfsnc.h>
+#include <cfs/pioctl.h>
+
+/* 
+ * These flags select various performance enhancements.
+ */
+int cfs_intercept_rdwr = 1;    /* Set to handle read/write in the kernel */
+int cfs_attr_cache  = 1;       /* Set to cache attributes in the kernel */
+int cfs_symlink_cache = 1;     /* Set to cache symbolic link information */
+int cfs_access_cache = 1;      /* Set to handle some access checks directly */
+
+/* structure to keep track of vfs calls */
+
+struct cfs_op_stats cfs_vnodeopstats[CFS_VNODEOPS_SIZE];
+
+#define MARK_ENTRY(op) (cfs_vnodeopstats[op].entries++)
+#define MARK_INT_SAT(op) (cfs_vnodeopstats[op].sat_intrn++)
+#define MARK_INT_FAIL(op) (cfs_vnodeopstats[op].unsat_intrn++)
+#define MARK_INT_GEN(op) (cfs_vnodeopstats[op].gen_intrn++)
+
+/* What we are delaying for in printf */
+int cfs_printf_delay = 0;  /* in microseconds */
+int cfs_vnop_print_entry = 0;
+static int cfs_lockdebug = 0;
+
+/* Definition of the vfs operation vector */
+
+/*
+ * Some NetBSD details:
+ * 
+ *   cfs_start is called at the end of the mount syscall.
+ *   cfs_init is called at boot time.
+ */
+
+#ifdef __GNUC__
+#define ENTRY    \
+   if(cfs_vnop_print_entry) myprintf(("Entered %s\n",__FUNCTION__))
+#else
+#define ENTRY
+#endif 
+
+/* Definition of the vnode operation vector */
+
+struct vnodeopv_entry_desc cfs_vnodeop_entries[] = {
+    { &vop_default_desc, nbsd_vop_error },
+    { &vop_lookup_desc, cfs_lookup },		/* lookup */
+    { &vop_create_desc, cfs_create },		/* create */
+    { &vop_mknod_desc, nbsd_vop_error },	/* mknod */
+    { &vop_open_desc, cfs_open },		/* open */
+    { &vop_close_desc, cfs_close },		/* close */
+    { &vop_access_desc, cfs_access },		/* access */
+    { &vop_getattr_desc, cfs_getattr },		/* getattr */
+    { &vop_setattr_desc, cfs_setattr },		/* setattr */
+    { &vop_read_desc, cfs_read },		/* read */
+    { &vop_write_desc, cfs_write },		/* write */
+    { &vop_ioctl_desc, cfs_ioctl },		/* ioctl */
+/* 1.3    { &vop_select_desc, cfs_select },	select */
+    { &vop_mmap_desc, nbsd_vop_error },		/* mmap */
+    { &vop_fsync_desc, cfs_fsync },		/* fsync */
+    { &vop_remove_desc, cfs_remove },		/* remove */
+    { &vop_link_desc, cfs_link },		/* link */
+    { &vop_rename_desc, cfs_rename },		/* rename */
+    { &vop_mkdir_desc, cfs_mkdir },		/* mkdir */
+    { &vop_rmdir_desc, cfs_rmdir },		/* rmdir */
+    { &vop_symlink_desc, cfs_symlink },		/* symlink */
+    { &vop_readdir_desc, cfs_readdir },		/* readdir */
+    { &vop_readlink_desc, cfs_readlink },	/* readlink */
+    { &vop_abortop_desc, cfs_abortop },		/* abortop */
+    { &vop_inactive_desc, cfs_inactive },	/* inactive */
+    { &vop_reclaim_desc, cfs_reclaim },		/* reclaim */
+    { &vop_lock_desc, cfs_lock },		/* lock */
+    { &vop_unlock_desc, cfs_unlock },		/* unlock */
+    { &vop_bmap_desc, cfs_bmap },		/* bmap */
+    { &vop_strategy_desc, cfs_strategy },	/* strategy */
+    { &vop_print_desc, nbsd_vop_error },	/* print */
+    { &vop_islocked_desc, cfs_islocked },	/* islocked */
+    { &vop_pathconf_desc, nbsd_vop_error },	/* pathconf */
+    { &vop_advlock_desc, nbsd_vop_nop },	/* advlock */
+    { &vop_bwrite_desc, nbsd_vop_error },	/* bwrite */
+    { &vop_lease_desc, nbsd_vop_nop },          /* lease */
+
+#ifdef	__FreeBSD_version
+#else	/*  FreeBSD stable & NetBSD both */
+    { &vop_blkatoff_desc, nbsd_vop_error },	/* blkatoff */
+    { &vop_valloc_desc, nbsd_vop_error },	/* valloc */
+    { &vop_vfree_desc, nbsd_vop_error },	/* vfree */
+    { &vop_truncate_desc, nbsd_vop_error },	/* truncate */
+    { &vop_update_desc, nbsd_vop_error },	/* update */
+#endif
+
+    /* NetBSD only */
+#ifdef	__NetBSD__
+#ifdef	NetBSD1_3
+    { &vop_seek_desc, genfs_seek },		/* seek */
+#else
+    { &vop_seek_desc, nbsd_vop_error },		/* seek */
+#endif
+#endif
+
+    /* FreeBSD only */
+#ifdef	__FreeBSD__
+
+#ifdef	__FreeBSD_version
+
+    { &vop_poll_desc,		(vop_t *) vop_stdpoll },
+    { &vop_getpages_desc, (vop_t *) cfs_fbsd_getpages },       /* pager intf.*/
+    { &vop_putpages_desc, (vop_t *) cfs_fbsd_putpages },       /* pager intf.*/
+
+#if	0
+#define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
+#define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
+#define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
+#define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee)
+#define UFS_UPDATE(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_update(aa, bb, cc, dd)
+
+    missing
+    { &vop_reallocblks_desc,	(vop_t *) ufs_missingop },
+    { &vop_cachedlookup_desc,	(vop_t *) ufs_lookup },
+    { &vop_whiteout_desc,	(vop_t *) ufs_whiteout },
+#endif
+
+#else	/* FreeBSD stable */
+    { &vop_getpages_desc, fbsd_vnotsup },       /* pager intf.*/
+    { &vop_putpages_desc, fbsd_vnotsup },       /* pager intf.*/
+    { &vop_seek_desc, nbsd_vop_error },		/* seek */
+    { &vop_blkatoff_desc, nbsd_vop_error },	/* blkatoff */
+    { &vop_valloc_desc, nbsd_vop_error },	/* valloc */
+    { &vop_vfree_desc, nbsd_vop_error },	/* vfree */
+    { &vop_truncate_desc, nbsd_vop_error },	/* truncate */
+    { &vop_update_desc, nbsd_vop_error },	/* update */
+#endif
+#endif
+    { (struct vnodeop_desc*)NULL, (int(*)(void *))NULL }
+};
+
+#ifdef __NetBSD__
+struct vnodeopv_desc cfs_vnodeop_opv_desc = 
+        { &cfs_vnodeop_p, cfs_vnodeop_entries };
+
+#define NAMEI_FREE(a) FREE(a, M_NAMEI)
+#endif
+
+#ifdef __FreeBSD__
+static struct vnodeopv_desc cfs_vnodeop_opv_desc =
+		{ &cfs_vnodeop_p, cfs_vnodeop_entries };
+
+#include <sys/kernel.h>
+VNODEOP_SET(cfs_vnodeop_opv_desc);
+
+int
+fbsd_vnotsup(ap)
+    void *ap;
+{
+    return(EOPNOTSUPP);
+}
+
+#ifdef	__FreeBSD_version
+#include <vm/vm_zone.h>
+
+#define NAMEI_FREE(a) zfree(namei_zone, a);
+#else
+#define NAMEI_FREE(a) FREE(a, M_NAMEI)
+#endif
+#endif
+
+/* Definitions of NetBSD vnodeop interfaces */
+
+/* A generic panic: we were called with something we didn't define yet */
+int
+nbsd_vop_error(void *anon) {
+    struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
+
+    myprintf(("Vnode operation %s called, but not defined\n",
+	      (*desc)->vdesc_name));
+    panic("nbsd_vop_error");
+    return 0;
+}
+
+/* A generic do-nothing.  For lease_check, advlock */
+int
+nbsd_vop_nop(void *anon) {
+    struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
+
+    if (cfsdebug) {
+	myprintf(("Vnode operation %s called, but unsupported\n",
+		  (*desc)->vdesc_name));
+    } 
+   return (0);
+}
+
+int
+cfs_vnodeopstats_init(void)
+{
+	register int i;
+	
+	for(i=0;i<CFS_VNODEOPS_SIZE;i++) {
+		cfs_vnodeopstats[i].opcode = i;
+		cfs_vnodeopstats[i].entries = 0;
+		cfs_vnodeopstats[i].sat_intrn = 0;
+		cfs_vnodeopstats[i].unsat_intrn = 0;
+		cfs_vnodeopstats[i].gen_intrn = 0;
+	}
+	
+	return 0;
+}
+		
+/* 
+ * cfs_open calls Venus to return the device, inode pair of the cache
+ * file holding the data. Using iget, cfs_open finds the vnode of the
+ * cache file, and then opens it.
+ */
+int
+cfs_open(v)
+    void *v;
+{
+    /* 
+     * NetBSD can pass the O_EXCL flag in mode, even though the check
+     * has already happened.  Venus defensively assumes that if open
+     * is passed the EXCL, it must be a bug.  We strip the flag here.
+     */
+/* true args */
+    struct vop_open_args *ap = v;
+    register struct vnode **vpp = &(ap->a_vp);
+    struct cnode *cp = VTOC(*vpp);
+    int flag = ap->a_mode & (~O_EXCL);
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_p;
+/* locals */
+    int error;
+    struct vnode *vp;
+    dev_t dev;
+    ino_t inode;
+
+    MARK_ENTRY(CFS_OPEN_STATS);
+
+    /* Check for open of control file. */
+    if (IS_CTL_VP(*vpp)) {
+	/* XXX */
+	/* if (WRITEABLE(flag)) */ 
+	if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) {
+	    MARK_INT_FAIL(CFS_OPEN_STATS);
+	    return(EACCES);
+	}
+	MARK_INT_SAT(CFS_OPEN_STATS);
+	return(0);
+    }
+
+    error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, p, &dev, &inode);
+    if (error)
+	return (error);
+    if (!error) {
+	CFSDEBUG( CFS_OPEN,myprintf(("open: dev %d inode %d result %d\n",
+				  dev, inode, error)); )
+    }
+
+    /* Translate the <device, inode> pair for the cache file into
+       an inode pointer. */
+    error = cfs_grab_vnode(dev, inode, &vp);
+    if (error)
+	return (error);
+
+    /* We get the vnode back locked in both Mach and NetBSD.  Needs unlocked */
+    VOP_X_UNLOCK(vp, 0);
+    /* Keep a reference until the close comes in. */
+    vref(*vpp);                
+
+    /* Save the vnode pointer for the cache file. */
+    if (cp->c_ovp == NULL) {
+	cp->c_ovp = vp;
+    } else {
+	if (cp->c_ovp != vp)
+	    panic("cfs_open:  cp->c_ovp != ITOV(ip)");
+    }
+    cp->c_ocount++;
+
+    /* Flush the attribute cached if writing the file. */
+    if (flag & FWRITE) {
+	cp->c_owrite++;
+	cp->c_flags &= ~C_VATTR;
+    }
+
+    /* Save the <device, inode> pair for the cache file to speed
+       up subsequent page_read's. */
+    cp->c_device = dev;
+    cp->c_inode = inode;
+
+    /* Open the cache file. */
+    error = VOP_OPEN(vp, flag, cred, p); 
+#ifdef	__FreeBSD__
+    if (error) {
+    	printf("cfs_open: VOP_OPEN on container failed %d\n", error);
+	return (error);
+    }
+    if (vp->v_type == VREG) {
+    	error = vfs_object_create(vp, p, cred, 1);
+	if (error != 0) {
+	    printf("cfs_open: vfs_object_create() returns %d\n", error);
+	    vput(vp);
+	}
+    }
+#endif
+    return(error);
+}
+
+/*
+ * Close the cache file used for I/O and notify Venus.
+ */
+int
+cfs_close(v)
+    void *v;
+{
+/* true args */
+    struct vop_close_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    int flag = ap->a_fflag;
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_p;
+/* locals */
+    int error;
+
+    MARK_ENTRY(CFS_CLOSE_STATS);
+
+    /* Check for close of control file. */
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_SAT(CFS_CLOSE_STATS);
+	return(0);
+    }
+
+    if (IS_UNMOUNTING(cp)) {
+	if (cp->c_ovp) {
+	    printf("cfs_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n",
+		    vp->v_usecount, cp->c_ovp, vp, cp);
+	    vgone(cp->c_ovp);
+	} else {
+	    printf("cfs_close: NO container vp %p/cp %p\n", vp, cp);
+	}
+	return ENODEV;
+    } else {
+	VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */
+	vrele(cp->c_ovp);
+    }
+
+    if (--cp->c_ocount == 0)
+	cp->c_ovp = NULL;
+
+    if (flag & FWRITE)                    /* file was opened for write */
+	--cp->c_owrite;
+
+    error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, p);
+    vrele(CTOV(cp));
+
+    CFSDEBUG(CFS_CLOSE, myprintf(("close: result %d\n",error)); )
+    return(error);
+}
+
+int
+cfs_read(v)
+    void *v;
+{
+    struct vop_read_args *ap = v;
+
+    ENTRY;
+    return(cfs_rdwr(ap->a_vp, ap->a_uio, UIO_READ,
+		    ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp));
+}
+
+int
+cfs_write(v)
+    void *v;
+{
+    struct vop_write_args *ap = v;
+
+    ENTRY;
+    return(cfs_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE,
+		    ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp));
+}
+
+int
+cfs_rdwr(vp, uiop, rw, ioflag, cred, p)
+    struct vnode *vp;
+    struct uio *uiop;
+    enum uio_rw rw;
+    int ioflag;
+    struct ucred *cred;
+    struct proc *p;
+{ 
+/* upcall decl */
+  /* NOTE: container file operation!!! */
+/* locals */
+    struct cnode *cp = VTOC(vp);
+    struct vnode *cfvp = cp->c_ovp;
+    int igot_internally = 0;
+    int opened_internally = 0;
+    int error = 0;
+
+    MARK_ENTRY(CFS_RDWR_STATS);
+
+    CFSDEBUG(CFS_RDWR, myprintf(("cfs_rdwr(%d, %p, %d, %qd, %d)\n", rw, 
+			      uiop->uio_iov->iov_base, uiop->uio_resid, 
+			      uiop->uio_offset, uiop->uio_segflg)); )
+	
+    /* Check for rdwr of control object. */
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_FAIL(CFS_RDWR_STATS);
+	return(EINVAL);
+    }
+
+    /* Redirect the request to UFS. */
+
+    /* 
+     * If file is not already open this must be a page
+     * {read,write} request.  Iget the cache file's inode
+     * pointer if we still have its <device, inode> pair.
+     * Otherwise, we must do an internal open to derive the
+     * pair. 
+     */
+    if (cfvp == NULL) {
+	/* 
+	 * If we're dumping core, do the internal open. Otherwise
+	 * venus won't have the correct size of the core when
+	 * it's completely written.
+	 */
+	if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 
+	    igot_internally = 1;
+	    error = cfs_grab_vnode(cp->c_device, cp->c_inode, &cfvp);
+	    if (error) {
+		MARK_INT_FAIL(CFS_RDWR_STATS);
+		return(error);
+	    }
+	    /* 
+	     * We get the vnode back locked in both Mach and
+	     * NetBSD.  Needs unlocked 
+	     */
+	    VOP_X_UNLOCK(cfvp, 0);
+	}
+	else {
+	    opened_internally = 1;
+	    MARK_INT_GEN(CFS_OPEN_STATS);
+	    error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 
+			     cred, p);
+printf("cfs_rdwr: Internally Opening %p\n", vp);
+#ifdef	__FreeBSD__
+	    if (error) {
+		printf("cfs_rdwr: VOP_OPEN on container failed %d\n", error);
+		return (error);
+	    }
+	    if (vp->v_type == VREG) {
+		error = vfs_object_create(vp, p, cred, 1);
+		if (error != 0) {
+		    printf("cfs_rdwr: vfs_object_create() returns %d\n", error);
+		    vput(vp);
+		}
+	    }
+#endif
+	    if (error) {
+		MARK_INT_FAIL(CFS_RDWR_STATS);
+		return(error);
+	    }
+	    cfvp = cp->c_ovp;
+	}
+    }
+
+    /* Have UFS handle the call. */
+    CFSDEBUG(CFS_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n",
+			      cp->c_fid.Volume, cp->c_fid.Vnode, 
+			      cp->c_fid.Unique, CTOV(cp)->v_usecount)); )
+
+    if (rw == UIO_READ) {
+	error = VOP_READ(cfvp, uiop, ioflag, cred);
+    } else {
+	error = VOP_WRITE(cfvp, uiop, ioflag, cred);
+#ifdef	__FreeBSD__
+	/* ufs_write updates the vnode_pager_setsize for the vnode/object */
+	{   struct vattr attr;
+
+	    if (VOP_GETATTR(cfvp, &attr, cred, p) == 0) {
+		vnode_pager_setsize(vp, attr.va_size);
+#ifdef	__DEBUG_FreeBSD__
+		printf("write: vnode_pager_setsize(%p, %d)\n", vp, attr.va_size);
+#endif
+	    }
+	}
+#endif
+    }
+
+    if (error)
+	MARK_INT_FAIL(CFS_RDWR_STATS);
+    else
+	MARK_INT_SAT(CFS_RDWR_STATS);
+
+    /* Do an internal close if necessary. */
+    if (opened_internally) {
+	MARK_INT_GEN(CFS_CLOSE_STATS);
+	(void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, p);
+    }
+
+    /* Invalidate cached attributes if writing. */
+    if (rw == UIO_WRITE)
+	cp->c_flags &= ~C_VATTR;
+    return(error);
+}
+
+int
+cfs_ioctl(v)
+    void *v;
+{
+/* true args */
+    struct vop_ioctl_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    int com = ap->a_command;
+    caddr_t data = ap->a_data;
+    int flag = ap->a_fflag;
+    struct ucred *cred = ap->a_cred;
+    struct proc  *p = ap->a_p;
+/* locals */
+    int error;
+    struct vnode *tvp;
+    struct nameidata ndp;
+    struct PioctlData *iap = (struct PioctlData *)data;
+
+    MARK_ENTRY(CFS_IOCTL_STATS);
+
+    CFSDEBUG(CFS_IOCTL, myprintf(("in cfs_ioctl on %s\n", iap->path));)
+	
+    /* Don't check for operation on a dying object, for ctlvp it
+       shouldn't matter */
+	
+    /* Must be control object to succeed. */
+    if (!IS_CTL_VP(vp)) {
+	MARK_INT_FAIL(CFS_IOCTL_STATS);
+	CFSDEBUG(CFS_IOCTL, myprintf(("cfs_ioctl error: vp != ctlvp"));)
+	    return (EOPNOTSUPP);
+    }
+    /* Look up the pathname. */
+
+    /* Should we use the name cache here? It would get it from
+       lookupname sooner or later anyway, right? */
+
+    NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, ((caddr_t)iap->path), p);
+    error = namei(&ndp);
+    tvp = ndp.ni_vp;
+
+    if (error) {
+	MARK_INT_FAIL(CFS_IOCTL_STATS);
+	CFSDEBUG(CFS_IOCTL, myprintf(("cfs_ioctl error: lookup returns %d\n",
+				   error));)
+	return(error);
+    }
+
+    /* 
+     * Make sure this is a coda style cnode, but it may be a
+     * different vfsp 
+     */
+    /* XXX: this totally violates the comment about vtagtype in vnode.h */
+    if (tvp->v_tag != VT_CFS) {
+	vrele(tvp);
+	MARK_INT_FAIL(CFS_IOCTL_STATS);
+	CFSDEBUG(CFS_IOCTL, 
+		 myprintf(("cfs_ioctl error: %s not a coda object\n", 
+			iap->path));)
+	return(EINVAL);
+    }
+
+    if (iap->vi.in_size > VC_MAXDATASIZE) {
+	vrele(tvp);
+	return(EINVAL);
+    }
+    error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p);
+
+    if (error)
+	MARK_INT_FAIL(CFS_IOCTL_STATS);
+    else
+	CFSDEBUG(CFS_IOCTL, myprintf(("Ioctl returns %d \n", error)); )
+
+    vrele(tvp);
+    return(error);
+}
+
+#if	0
+int
+cfs_select(v)
+    void *v;
+{
+/* true args */
+    struct vop_select_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    int which = ap->a_which;
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_p;
+/* upcall decl */
+/* locals */
+
+	MARK_ENTRY(CFS_SELECT_STATS);
+
+	myprintf(("in cfs_select\n"));
+	MARK_INT_FAIL(CFS_SELECT_STATS);
+	return (EOPNOTSUPP);
+}
+#endif
+
+/*
+ * To reduce the cost of a user-level venus;we cache attributes in
+ * the kernel.  Each cnode has storage allocated for an attribute. If
+ * c_vattr is valid, return a reference to it. Otherwise, get the
+ * attributes from venus and store them in the cnode.  There is some
+ * question if this method is a security leak. But I think that in
+ * order to make this call, the user must have done a lookup and
+ * opened the file, and therefore should already have access.  
+ */
+int
+cfs_getattr(v)
+    void *v;
+{
+/* true args */
+    struct vop_getattr_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    struct vattr *vap = ap->a_vap;
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_p;
+/* locals */
+    int error;
+    struct cnode *scp = NULL;
+
+    MARK_ENTRY(CFS_GETATTR_STATS);
+
+#if	0
+    /* Check for operation on a dying object */
+    if (IS_DYING(cp)) {
+	COMPLAIN_BITTERLY(getattr, cp->c_fid);
+	scp = cp;	/* Save old cp */
+	/* If no error, gives a valid vnode with which to work. */
+	error = getNewVnode(&vp);	
+	if (error) {
+	    MARK_INT_FAIL(CFS_GETATTR_STATS);
+	    return(error);	/* Can't contact dead venus */
+	}
+	cp = VTOC(vp);
+    }
+#endif
+
+#ifdef	__FreeBSD__
+    if (IS_UNMOUNTING(cp))
+	return ENODEV;
+#endif
+    /* Check for getattr of control object. */
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_FAIL(CFS_GETATTR_STATS);
+	return(ENOENT);
+    }
+
+    /* Check to see if the attributes have already been cached */
+    if (VALID_VATTR(cp)) { 
+	CFSDEBUG(CFS_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n",
+				       cp->c_fid.Volume,
+				       cp->c_fid.Vnode,
+				       cp->c_fid.Unique));});
+	CFSDEBUG(CFS_GETATTR, if (!(cfsdebug & ~CFS_GETATTR))
+		 print_vattr(&cp->c_vattr); );
+	
+	*vap = cp->c_vattr;
+	MARK_INT_SAT(CFS_GETATTR_STATS);
+	if (scp) vrele(vp);
+	return(0);
+    }
+
+    error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap);
+
+    if (!error) {
+	CFSDEBUG(CFS_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n",
+				     cp->c_fid.Volume,
+				     cp->c_fid.Vnode,
+				     cp->c_fid.Unique,
+				     error)); )
+	    
+	CFSDEBUG(CFS_GETATTR, if (!(cfsdebug & ~CFS_GETATTR))
+		 print_vattr(vap);	);
+	
+#ifdef	__FreeBSD__
+    {	int size = vap->va_size;
+    	struct vnode *convp = cp->c_ovp;
+	if (convp != (struct vnode *)0) {
+	    vnode_pager_setsize(convp, size);
+#ifdef	__DEBUG_FreeBSD__
+	    printf("getattr: vnode_pager_setsize(%p, %d)\n", convp, size);
+#endif
+	}
+    }
+#endif
+	/* If not open for write, store attributes in cnode */   
+	if ((cp->c_owrite == 0) && (cfs_attr_cache)) {  
+	    cp->c_vattr = *vap;
+	    cp->c_flags |= C_VATTR; 
+	}
+	
+    }
+    if (scp) vrele(vp);
+    return(error);
+}
+
+int
+cfs_setattr(v)
+    void *v;
+{
+/* true args */
+    struct vop_setattr_args *ap = v;
+    register struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    register struct vattr *vap = ap->a_vap;
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_p;
+/* locals */
+    int error;
+
+    MARK_ENTRY(CFS_SETATTR_STATS);
+
+    /* Check for setattr of control object. */
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_FAIL(CFS_SETATTR_STATS);
+	return(ENOENT);
+    }
+
+    if (cfsdebug & CFSDBGMSK(CFS_SETATTR)) {
+	print_vattr(vap);
+    }
+    error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p);
+
+    if (!error)
+	cp->c_flags &= ~C_VATTR;
+
+#ifdef	__FreeBSD__
+    {	int size = vap->va_size;
+    	struct vnode *convp = cp->c_ovp;
+	if (size != VNOVAL && convp != (struct vnode *)0) {
+	    vnode_pager_setsize(convp, size);
+#ifdef	__DEBUG_FreeBSD__
+	    printf("setattr: vnode_pager_setsize(%p, %d)\n", convp, size);
+#endif
+	}
+    }
+#endif
+    CFSDEBUG(CFS_SETATTR,	myprintf(("setattr %d\n", error)); )
+    return(error);
+}
+
+int
+cfs_access(v)
+    void *v;
+{
+/* true args */
+    struct vop_access_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    int mode = ap->a_mode;
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_p;
+/* locals */
+    int error;
+
+    MARK_ENTRY(CFS_ACCESS_STATS);
+
+    /* Check for access of control object.  Only read access is
+       allowed on it. */
+    if (IS_CTL_VP(vp)) {
+	/* bogus hack - all will be marked as successes */
+	MARK_INT_SAT(CFS_ACCESS_STATS);
+	return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 
+	       ? 0 : EACCES);
+    }
+
+    /*
+     * if the file is a directory, and we are checking exec (eg lookup) 
+     * access, and the file is in the namecache, then the user must have 
+     * lookup access to it.
+     */
+    if (cfs_access_cache) {
+	if ((vp->v_type == VDIR) && (mode & VEXEC)) {
+	    if (cfsnc_lookup(cp, ".", 1, cred)) {
+		MARK_INT_SAT(CFS_ACCESS_STATS);
+		return(0);                     /* it was in the cache */
+	    }
+	}
+    }
+
+    error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p);
+
+    return(error);
+}
+
+/*
+ * CFS abort op, called after namei() when a CREATE/DELETE isn't actually
+ * done. If a buffer has been saved in anticipation of a cfs_create or
+ * a cfs_remove, delete it.
+ */
+/* ARGSUSED */
+int
+cfs_abortop(v)
+    void *v;
+{
+/* true args */
+    struct vop_abortop_args /* {
+	struct vnode *a_dvp;
+	struct componentname *a_cnp;
+    } */ *ap = v;
+/* upcall decl */
+/* locals */
+
+    if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)
+	NAMEI_FREE(ap->a_cnp->cn_pnbuf);
+    return (0);
+}
+
+int
+cfs_readlink(v)
+    void *v;
+{
+/* true args */
+    struct vop_readlink_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    struct uio *uiop = ap->a_uio;
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_uio->uio_procp;
+/* locals */
+    int error;
+    char *str;
+    int len;
+
+    MARK_ENTRY(CFS_READLINK_STATS);
+
+    /* Check for readlink of control object. */
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_FAIL(CFS_READLINK_STATS);
+	return(ENOENT);
+    }
+
+    if ((cfs_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */
+	uiop->uio_rw = UIO_READ;
+	error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop);
+	if (error)
+	    MARK_INT_FAIL(CFS_READLINK_STATS);
+	else
+	    MARK_INT_SAT(CFS_READLINK_STATS);
+	return(error);
+    }
+
+    error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len);
+
+    if (!error) {
+	uiop->uio_rw = UIO_READ;
+	error = uiomove(str, len, uiop);
+
+	if (cfs_symlink_cache) {
+	    cp->c_symlink = str;
+	    cp->c_symlen = len;
+	    cp->c_flags |= C_SYMLINK;
+	} else
+	    CFS_FREE(str, len);
+    }
+
+    CFSDEBUG(CFS_READLINK, myprintf(("in readlink result %d\n",error));)
+    return(error);
+}
+
+int
+cfs_fsync(v)
+    void *v;
+{
+/* true args */
+    struct vop_fsync_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    struct ucred *cred = ap->a_cred;
+    struct proc *p = ap->a_p;
+/* locals */
+    struct vnode *convp = cp->c_ovp;
+    int error;
+   
+    MARK_ENTRY(CFS_FSYNC_STATS);
+
+    /* Check for fsync on an unmounting object */
+    /* The NetBSD kernel, in it's infinite wisdom, can try to fsync
+     * after an unmount has been initiated.  This is a Bad Thing,
+     * which we have to avoid.  Not a legitimate failure for stats.
+     */
+    if (IS_UNMOUNTING(cp)) {
+	return(ENODEV);
+    }
+
+    /* Check for fsync of control object. */
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_SAT(CFS_FSYNC_STATS);
+	return(0);
+    }
+
+    if (convp)
+    	VOP_FSYNC(convp, cred, MNT_WAIT, p);
+
+#ifdef	__FreeBSD__
+    /*
+     * We see fsyncs with usecount == 1 then usecount == 0.
+     * For now we ignore them.
+     */
+    /*
+    if (!vp->v_usecount) {
+    	printf("cfs_fsync on vnode %p with %d usecount.  c_flags = %x (%x)\n",
+		vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING);
+    }
+    */
+#endif
+
+    /*
+     * We can expect fsync on any vnode at all if venus is pruging it.
+     * Venus can't very well answer the fsync request, now can it?
+     * Hopefully, it won't have to, because hopefully, venus preserves
+     * the (possibly untrue) invariant that it never purges an open
+     * vnode.  Hopefully.
+     */
+    if (cp->c_flags & C_PURGING) {
+	return(0);
+    }
+
+#ifdef	__FreeBSD__
+    /* needs research */
+    return 0;
+#endif
+    error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p);
+
+    CFSDEBUG(CFS_FSYNC, myprintf(("in fsync result %d\n",error)); );
+    return(error);
+}
+
+int
+cfs_inactive(v)
+    void *v;
+{
+    /* XXX - at the moment, inactive doesn't look at cred, and doesn't
+       have a proc pointer.  Oops. */
+/* true args */
+    struct vop_inactive_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    struct ucred *cred __attribute__((unused)) = NULL;
+    struct proc *p __attribute__((unused)) = curproc;
+/* upcall decl */
+/* locals */
+
+    /* We don't need to send inactive to venus - DCS */
+    MARK_ENTRY(CFS_INACTIVE_STATS);
+
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_SAT(CFS_INACTIVE_STATS);
+	return 0;
+    }
+
+    CFSDEBUG(CFS_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n",
+				  cp->c_fid.Volume, cp->c_fid.Vnode, 
+				  cp->c_fid.Unique, vp->v_mount));)
+
+#ifdef	__DEBUG_FreeBSD__
+    if (vp->v_flag & VXLOCK)
+	printf ("Inactive: Vnode is Locked\n");
+#endif
+
+    /* If an array has been allocated to hold the symlink, deallocate it */
+    if ((cfs_symlink_cache) && (VALID_SYMLINK(cp))) {
+	if (cp->c_symlink == NULL)
+	    panic("cfs_inactive: null symlink pointer in cnode");
+	
+	CFS_FREE(cp->c_symlink, cp->c_symlen);
+	cp->c_flags &= ~C_SYMLINK;
+	cp->c_symlen = 0;
+    }
+
+    /* Remove it from the table so it can't be found. */
+    cfs_unsave(cp);
+    if ((struct cfs_mntinfo *)(vp->v_mount->mnt_data) == NULL) {
+	myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp));
+	panic("badness in cfs_inactive\n");
+    }
+
+    if (IS_UNMOUNTING(cp)) {
+#ifdef	DEBUG
+	printf("cfs_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp);
+	if (cp->c_ovp != NULL)
+	    printf("cfs_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n",
+	    	   vp->v_usecount, vp, cp);
+#endif
+#ifdef	NEW_LOCKMGR
+	NEW_LOCKMGR(&cp->c_lock, LK_RELEASE, &vp->v_interlock);
+#endif
+    } else {
+#ifdef DIAGNOSTIC
+	if (CTOV(cp)->v_usecount) {
+	    panic("cfs_inactive: nonzero reference count");
+	}
+	if (cp->c_ovp != NULL) {
+	    panic("cfs_inactive:  cp->ovp != NULL");
+	}
+#endif
+#ifdef	NEW_LOCKMGR
+	VOP_X_UNLOCK(vp, 0);
+#endif
+	vgone(vp);
+    }
+
+    MARK_INT_SAT(CFS_INACTIVE_STATS);
+    return(0);
+}
+
+/*
+ * Remote file system operations having to do with directory manipulation.
+ */
+
+/* 
+ * It appears that in NetBSD, lookup is supposed to return the vnode locked
+ */
+int
+cfs_lookup(v)
+    void *v;
+{
+/* true args */
+    struct vop_lookup_args *ap = v;
+    struct vnode *dvp = ap->a_dvp;
+    struct cnode *dcp = VTOC(dvp);
+    struct vnode **vpp = ap->a_vpp;
+    /* 
+     * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest
+     * of the string to xlate, and that we must try to get at least
+     * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth.  I
+     * could be wrong. 
+     */
+    struct componentname  *cnp = ap->a_cnp;
+    struct ucred *cred = cnp->cn_cred;
+    struct proc *p = cnp->cn_proc;
+/* locals */
+    struct cnode *cp;
+    struct cnode *scp = NULL;
+    const char *nm = cnp->cn_nameptr;
+    int len = cnp->cn_namelen;
+    ViceFid VFid;
+    int	vtype;
+    int error = 0;
+
+    MARK_ENTRY(CFS_LOOKUP_STATS);
+
+    CFSDEBUG(CFS_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n",
+				   nm, dcp->c_fid.Volume,
+				   dcp->c_fid.Vnode, dcp->c_fid.Unique)););
+
+#if	0
+    /* Check for operation on a dying object */
+    if (IS_DYING(dcp)) {
+	COMPLAIN_BITTERLY(lookup, dcp->c_fid);
+	scp = dcp;	/* Save old dcp */
+	/* If no error, gives a valid vnode with which to work. */
+	error = getNewVnode(&dvp);	
+	if (error) {
+	    MARK_INT_FAIL(CFS_LOOKUP_STATS);
+	    return(error);	/* Can't contact dead venus */
+	}
+	dcp = VTOC(dvp);
+    }
+#endif
+
+    /* Check for lookup of control object. */
+    if (IS_CTL_NAME(dvp, nm, len)) {
+	*vpp = cfs_ctlvp;
+	vref(*vpp);
+	MARK_INT_SAT(CFS_LOOKUP_STATS);
+	if (scp) vrele(dvp);
+	goto exit;
+    }
+
+    if (len+1 > CFS_MAXNAMLEN) {
+	MARK_INT_FAIL(CFS_LOOKUP_STATS);
+	CFSDEBUG(CFS_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n",
+				    dcp->c_fid.Volume, dcp->c_fid.Vnode,
+				    dcp->c_fid.Unique, nm)););
+	*vpp = (struct vnode *)0;
+	error = EINVAL;
+	goto exit;
+    }
+    /* First try to look the file up in the cfs name cache */
+    /* lock the parent vnode? */
+    cp = cfsnc_lookup(dcp, nm, len, cred);
+    if (cp) {
+	*vpp = CTOV(cp);
+	vref(*vpp);
+	CFSDEBUG(CFS_LOOKUP, 
+		 myprintf(("lookup result %d vpp %p\n",error,*vpp));)
+    } else {
+	
+	/* The name wasn't cached, so we need to contact Venus */
+	error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype);
+	
+	if (error) {
+	    MARK_INT_FAIL(CFS_LOOKUP_STATS);
+	    CFSDEBUG(CFS_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n",
+					dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));)
+	    *vpp = (struct vnode *)0;
+	} else {
+	    MARK_INT_SAT(CFS_LOOKUP_STATS);
+	    CFSDEBUG(CFS_LOOKUP, 
+		     myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n",
+			    VFid.Volume, VFid.Vnode, VFid.Unique, vtype,
+			    error)); )
+		
+	    cp = makecfsnode(&VFid, dvp->v_mount, vtype);
+	    *vpp = CTOV(cp);
+	    
+	    /* enter the new vnode in the Name Cache only if the top bit isn't set */
+	    /* And don't enter a new vnode for an invalid one! */
+	    if (!(vtype & CFS_NOCACHE) && scp == 0)
+		cfsnc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
+	}
+    }
+
+ exit:
+    if (scp) vrele(dvp);
+    /* 
+     * If we are creating, and this was the last name to be looked up,
+     * and the error was ENOENT, then there really shouldn't be an
+     * error and we can make the leaf NULL and return success.  Since
+     * this is supposed to work under Mach as well as NetBSD, we're
+     * leaving this fn wrapped.  We also must tell lookup/namei that
+     * we need to save the last component of the name.  (Create will
+     * have to free the name buffer later...lucky us...)
+     */
+    if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME))
+	&& (cnp->cn_flags & ISLASTCN)
+	&& (error == ENOENT))
+    {
+	error = EJUSTRETURN;
+	cnp->cn_flags |= SAVENAME;
+	*ap->a_vpp = NULL;
+    }
+
+    /* 
+     * If we are removing, and we are at the last element, and we
+     * found it, then we need to keep the name around so that the
+     * removal will go ahead as planned.  Unfortunately, this will
+     * probably also lock the to-be-removed vnode, which may or may
+     * not be a good idea.  I'll have to look at the bits of
+     * cfs_remove to make sure.  We'll only save the name if we did in
+     * fact find the name, otherwise cfs_remove won't have a chance
+     * to free the pathname.  
+     */
+    if ((cnp->cn_nameiop == DELETE)
+	&& (cnp->cn_flags & ISLASTCN)
+	&& !error)
+    {
+	cnp->cn_flags |= SAVENAME;
+    }
+
+    /* 
+     * If the lookup went well, we need to (potentially?) unlock the
+     * parent, and lock the child.  We are only responsible for
+     * checking to see if the parent is supposed to be unlocked before
+     * we return.  We must always lock the child (provided there is
+     * one, and (the parent isn't locked or it isn't the same as the
+     * parent.)  Simple, huh?  We can never leave the parent locked unless
+     * we are ISLASTCN
+     */
+    if (!error || (error == EJUSTRETURN)) {
+	if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) {
+	    if ((error = VOP_X_UNLOCK(dvp, 0))) {
+		return error; 
+	    }	    
+	    /* 
+	     * The parent is unlocked.  As long as there is a child,
+	     * lock it without bothering to check anything else. 
+	     */
+	    if (*ap->a_vpp) {
+		if ((error = VOP_X_LOCK(*ap->a_vpp, LK_EXCLUSIVE))) {
+		    printf("cfs_lookup: ");
+		    panic("unlocked parent but couldn't lock child");
+		}
+	    }
+	} else {
+	    /* The parent is locked, and may be the same as the child */
+	    if (*ap->a_vpp && (*ap->a_vpp != dvp)) {
+		/* Different, go ahead and lock it. */
+		if ((error = VOP_X_LOCK(*ap->a_vpp, LK_EXCLUSIVE))) {
+		    printf("cfs_lookup: ");
+		    panic("unlocked parent but couldn't lock child");
+		}
+	    }
+	}
+    } else {
+	/* If the lookup failed, we need to ensure that the leaf is NULL */
+	/* Don't change any locking? */
+	*ap->a_vpp = NULL;
+    }
+    return(error);
+}
+
+/*ARGSUSED*/
+int
+cfs_create(v)
+    void *v;
+{
+/* true args */
+    struct vop_create_args *ap = v;
+    struct vnode *dvp = ap->a_dvp;
+    struct cnode *dcp = VTOC(dvp);
+    struct vattr *va = ap->a_vap;
+    int exclusive = 1;
+    int mode = ap->a_vap->va_mode;
+    struct vnode **vpp = ap->a_vpp;
+    struct componentname  *cnp = ap->a_cnp;
+    struct ucred *cred = cnp->cn_cred;
+    struct proc *p = cnp->cn_proc;
+/* locals */
+    int error;
+    struct cnode *cp;
+    const char *nm = cnp->cn_nameptr;
+    int len = cnp->cn_namelen;
+    ViceFid VFid;
+    struct vattr attr;
+
+    MARK_ENTRY(CFS_CREATE_STATS);
+
+    /* All creates are exclusive XXX */
+    /* I'm assuming the 'mode' argument is the file mode bits XXX */
+
+    /* Check for create of control object. */
+    if (IS_CTL_NAME(dvp, nm, len)) {
+	*vpp = (struct vnode *)0;
+	MARK_INT_FAIL(CFS_CREATE_STATS);
+	return(EACCES);
+    }
+
+    error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr);
+
+    if (!error) {
+	
+	/* If this is an exclusive create, panic if the file already exists. */
+	/* Venus should have detected the file and reported EEXIST. */
+
+	if ((exclusive == 1) &&
+	    (cfs_find(&VFid) != NULL))
+	    panic("cnode existed for newly created file!");
+	
+	cp = makecfsnode(&VFid, dvp->v_mount, attr.va_type);
+	*vpp = CTOV(cp);
+	
+	/* Update va to reflect the new attributes. */
+	(*va) = attr;
+	
+	/* Update the attribute cache and mark it as valid */
+	if (cfs_attr_cache) {
+	    VTOC(*vpp)->c_vattr = attr;
+	    VTOC(*vpp)->c_flags |= C_VATTR;       
+	}
+
+	/* Invalidate the parent's attr cache, the modification time has changed */
+	VTOC(dvp)->c_flags &= ~C_VATTR;
+	
+	/* enter the new vnode in the Name Cache */
+	cfsnc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
+	
+	CFSDEBUG(CFS_CREATE, 
+		 myprintf(("create: (%lx.%lx.%lx), result %d\n",
+			VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
+    } else {
+	*vpp = (struct vnode *)0;
+	CFSDEBUG(CFS_CREATE, myprintf(("create error %d\n", error));)
+    }
+
+    /* Locking strategy. */
+    /*
+     * In NetBSD, all creates must explicitly vput their dvp's.  We'll
+     * go ahead and use the LOCKLEAF flag of the cnp argument.
+     * However, I'm pretty sure that create must return the leaf
+     * locked; so there is a DIAGNOSTIC check to ensure that this is
+     * true.
+     */
+#ifdef	__FreeBSD_version
+    /*
+     * Well, FreeBSD -current does the vput put in
+     * kern/vfs_vnops.c.c:vn_open()
+     */
+#else
+    vput(dvp);
+#endif
+    if (!error) {
+	if (cnp->cn_flags & LOCKLEAF) {
+	    if ((error = VOP_X_LOCK(*ap->a_vpp, LK_EXCLUSIVE))) {
+		printf("cfs_create: ");
+		panic("unlocked parent but couldn't lock child");
+	    }
+	}
+#ifdef DIAGNOSTIC
+	else {
+	    printf("cfs_create: LOCKLEAF not set!\n");
+	}
+#endif /* DIAGNOSTIC */
+    }
+    /* Have to free the previously saved name */
+    /* 
+     * This condition is stolen from ufs_makeinode.  I have no idea
+     * why it's here, but what the hey...
+     */
+    if ((cnp->cn_flags & SAVESTART) == 0) {
+	NAMEI_FREE(cnp->cn_pnbuf);
+    }
+    return(error);
+}
+
+int
+cfs_remove(v)
+    void *v;
+{
+/* true args */
+    struct vop_remove_args *ap = v;
+    struct vnode *dvp = ap->a_dvp;
+    struct cnode *cp = VTOC(dvp);
+    struct componentname  *cnp = ap->a_cnp;
+    struct ucred *cred = cnp->cn_cred;
+    struct proc *p = cnp->cn_proc;
+/* locals */
+    int error;
+    const char *nm = cnp->cn_nameptr;
+    int len = cnp->cn_namelen;
+    struct cnode *tp;
+
+    MARK_ENTRY(CFS_REMOVE_STATS);
+
+    CFSDEBUG(CFS_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n",
+				   nm, cp->c_fid.Volume, cp->c_fid.Vnode,
+				   cp->c_fid.Unique)););
+
+    /* Remove the file's entry from the CFS Name Cache */
+    /* We're being conservative here, it might be that this person
+     * doesn't really have sufficient access to delete the file
+     * but we feel zapping the entry won't really hurt anyone -- dcs
+     */
+    /* I'm gonna go out on a limb here. If a file and a hardlink to it
+     * exist, and one is removed, the link count on the other will be
+     * off by 1. We could either invalidate the attrs if cached, or
+     * fix them. I'll try to fix them. DCS 11/8/94
+     */
+    tp = cfsnc_lookup(VTOC(dvp), nm, len, cred);
+    if (tp) {
+	if (VALID_VATTR(tp)) {	/* If attrs are cached */
+	    if (tp->c_vattr.va_nlink > 1) {	/* If it's a hard link */
+		tp->c_vattr.va_nlink--;
+	    }
+	}
+	
+	cfsnc_zapfile(VTOC(dvp), nm, len); 
+	/* No need to flush it if it doesn't exist! */
+    }
+    /* Invalidate the parent's attr cache, the modification time has changed */
+    VTOC(dvp)->c_flags &= ~C_VATTR;
+
+    /* Check for remove of control object. */
+    if (IS_CTL_NAME(dvp, nm, len)) {
+	MARK_INT_FAIL(CFS_REMOVE_STATS);
+	return(ENOENT);
+    }
+
+    error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p);
+
+    CFSDEBUG(CFS_REMOVE, myprintf(("in remove result %d\n",error)); )
+
+#ifdef	__FreeBSD_version
+    /*
+     * Well, FreeBSD -current does the vrele/vput put in
+     * kern/vfs_syscalls.c:unlink()
+     */
+#else
+    /* 
+     * Regardless of what happens, we have to unconditionally drop
+     * locks/refs on parent and child.  (I hope).  This is based on
+     * what ufs_remove seems to be doing.
+     */
+    if (dvp == ap->a_vp) {
+	vrele(ap->a_vp);
+    } else {
+	vput(ap->a_vp);
+    }
+    vput(dvp);
+#endif
+
+    if ((cnp->cn_flags & SAVESTART) == 0) {
+	NAMEI_FREE(cnp->cn_pnbuf);
+    }
+    return(error);
+}
+
+int
+cfs_link(v)
+    void *v;
+{
+/* true args */
+    struct vop_link_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+#ifdef	__NetBSD__
+    struct vnode *tdvp = ap->a_dvp;
+#elif	defined(__FreeBSD__)
+    struct vnode *tdvp = ap->a_tdvp;
+#endif
+    struct cnode *tdcp = VTOC(tdvp);
+    struct componentname *cnp = ap->a_cnp;
+    struct ucred *cred = cnp->cn_cred;
+    struct proc *p = cnp->cn_proc;
+/* locals */
+    int error;
+    const char *nm = cnp->cn_nameptr;
+    int len = cnp->cn_namelen;
+
+    MARK_ENTRY(CFS_LINK_STATS);
+
+    if (cfsdebug & CFSDBGMSK(CFS_LINK)) {
+
+	myprintf(("nb_link:   vp fid: (%lx.%lx.%lx)\n",
+		  cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
+	myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n",
+		  tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
+	
+    }
+    if (cfsdebug & CFSDBGMSK(CFS_LINK)) {
+	myprintf(("link:   vp fid: (%lx.%lx.%lx)\n",
+		  cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
+	myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n",
+		  tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
+
+    }
+
+    /* Check for link to/from control object. */
+    if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) {
+	MARK_INT_FAIL(CFS_LINK_STATS);
+	return(EACCES);
+    }
+
+    /*
+     * According to the ufs_link operation here's the locking situation:
+     *     We enter with the thing called "dvp" (the directory) locked.
+     *     We must unconditionally drop locks on "dvp"
+     *
+     *     We enter with the thing called "vp" (the linked-to) unlocked,
+     *       but ref'd (?)
+     *     We seem to need to lock it before calling cfs_link, and
+     *       unconditionally unlock it after.
+     */
+
+#ifdef	__FreeBSD_version
+    /*
+     * Well, FreeBSD -current does the vrele/vput put in
+     * kern/vfs_syscalls.c:link()
+     */
+#else
+    if ((ap->a_vp != tdvp) && (error = VOP_X_LOCK(ap->a_vp, LK_EXCLUSIVE))) {
+	goto exit;
+    }
+#endif
+	
+    error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p);
+
+    /* Invalidate the parent's attr cache, the modification time has changed */
+    VTOC(tdvp)->c_flags &= ~C_VATTR;
+    VTOC(vp)->c_flags &= ~C_VATTR;
+
+    CFSDEBUG(CFS_LINK,	myprintf(("in link result %d\n",error)); )
+
+exit:
+
+#ifdef	__FreeBSD_version
+    /*
+     * Well, FreeBSD -current does the vrele/vput put in
+     * kern/vfs_syscalls.c:link()
+     */
+#else
+    if (ap->a_vp != tdvp) {
+	VOP_X_UNLOCK(ap->a_vp, 0);
+    }
+    vput(tdvp);
+#endif
+
+    /* Drop the name buffer if we don't need to SAVESTART */
+    if ((cnp->cn_flags & SAVESTART) == 0) {
+	NAMEI_FREE(cnp->cn_pnbuf);
+    }
+    return(error);
+}
+
+int
+cfs_rename(v)
+    void *v;
+{
+/* true args */
+    struct vop_rename_args *ap = v;
+    struct vnode *odvp = ap->a_fdvp;
+    struct cnode *odcp = VTOC(odvp);
+    struct componentname  *fcnp = ap->a_fcnp;
+    struct vnode *ndvp = ap->a_tdvp;
+    struct cnode *ndcp = VTOC(ndvp);
+    struct componentname  *tcnp = ap->a_tcnp;
+    struct ucred *cred = fcnp->cn_cred;
+    struct proc *p = fcnp->cn_proc;
+/* true args */
+    int error;
+    const char *fnm = fcnp->cn_nameptr;
+    int flen = fcnp->cn_namelen;
+    const char *tnm = tcnp->cn_nameptr;
+    int tlen = tcnp->cn_namelen;
+
+    MARK_ENTRY(CFS_RENAME_STATS);
+
+    /* Hmmm.  The vnodes are already looked up.  Perhaps they are locked?
+       This could be Bad. XXX */
+#ifdef DIAGNOSTIC
+    if ((fcnp->cn_cred != tcnp->cn_cred)
+	|| (fcnp->cn_proc != tcnp->cn_proc))
+    {
+	panic("cfs_rename: component names don't agree");
+    }
+#endif DIAGNOSTIC
+
+    /* Check for rename involving control object. */ 
+    if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) {
+	MARK_INT_FAIL(CFS_RENAME_STATS);
+	return(EACCES);
+    }
+
+    /* Problem with moving directories -- need to flush entry for .. */
+    if (odvp != ndvp) {
+	struct cnode *ovcp = cfsnc_lookup(VTOC(odvp), fnm, flen, cred);
+	if (ovcp) {
+	    struct vnode *ovp = CTOV(ovcp);
+	    if ((ovp) &&
+		(ovp->v_type == VDIR)) /* If it's a directory */
+		cfsnc_zapfile(VTOC(ovp),"..", 2);
+	}
+    }
+
+    /* Remove the entries for both source and target files */
+    cfsnc_zapfile(VTOC(odvp), fnm, flen);
+    cfsnc_zapfile(VTOC(ndvp), tnm, tlen);
+
+    /* Invalidate the parent's attr cache, the modification time has changed */
+    VTOC(odvp)->c_flags &= ~C_VATTR;
+    VTOC(ndvp)->c_flags &= ~C_VATTR;
+
+    if (flen+1 > CFS_MAXNAMLEN) {
+	MARK_INT_FAIL(CFS_RENAME_STATS);
+	error = EINVAL;
+	goto exit;
+    }
+
+    if (tlen+1 > CFS_MAXNAMLEN) {
+	MARK_INT_FAIL(CFS_RENAME_STATS);
+	error = EINVAL;
+	goto exit;
+    }
+
+    error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p);
+
+ exit:
+    CFSDEBUG(CFS_RENAME, myprintf(("in rename result %d\n",error));)
+    /* XXX - do we need to call cache pureg on the moved vnode? */
+    cache_purge(ap->a_fvp);
+
+    /* It seems to be incumbent on us to drop locks on all four vnodes */
+    /* From-vnodes are not locked, only ref'd.  To-vnodes are locked. */
+
+    vrele(ap->a_fvp);
+    vrele(odvp);
+
+    if (ap->a_tvp) {
+	if (ap->a_tvp == ndvp) {
+	    vrele(ap->a_tvp);
+	} else {
+	    vput(ap->a_tvp);
+	}
+    }
+
+    vput(ndvp);
+    return(error);
+}
+
+int
+cfs_mkdir(v)
+    void *v;
+{
+/* true args */
+    struct vop_mkdir_args *ap = v;
+    struct vnode *dvp = ap->a_dvp;
+    struct cnode *dcp = VTOC(dvp);	
+    struct componentname  *cnp = ap->a_cnp;
+    register struct vattr *va = ap->a_vap;
+    struct vnode **vpp = ap->a_vpp;
+    struct ucred *cred = cnp->cn_cred;
+    struct proc *p = cnp->cn_proc;
+/* locals */
+    int error;
+    const char *nm = cnp->cn_nameptr;
+    int len = cnp->cn_namelen;
+    struct cnode *cp;
+    ViceFid VFid;
+    struct vattr ova;
+
+    MARK_ENTRY(CFS_MKDIR_STATS);
+
+    /* Check for mkdir of target object. */
+    if (IS_CTL_NAME(dvp, nm, len)) {
+	*vpp = (struct vnode *)0;
+	MARK_INT_FAIL(CFS_MKDIR_STATS);
+	return(EACCES);
+    }
+
+    if (len+1 > CFS_MAXNAMLEN) {
+	*vpp = (struct vnode *)0;
+	MARK_INT_FAIL(CFS_MKDIR_STATS);
+	return(EACCES);
+    }
+
+    error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova);
+
+    if (!error) {
+	if (cfs_find(&VFid) != NULL)
+	    panic("cnode existed for newly created directory!");
+	
+	
+	cp =  makecfsnode(&VFid, dvp->v_mount, va->va_type);
+	*vpp = CTOV(cp);
+	
+	/* enter the new vnode in the Name Cache */
+	cfsnc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
+
+	/* as a side effect, enter "." and ".." for the directory */
+	cfsnc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp));
+	cfsnc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp));
+
+	if (cfs_attr_cache) {
+	    VTOC(*vpp)->c_vattr = ova;		/* update the attr cache */
+	    VTOC(*vpp)->c_flags |= C_VATTR;	/* Valid attributes in cnode */
+	}
+
+	/* Invalidate the parent's attr cache, the modification time has changed */
+	VTOC(dvp)->c_flags &= ~C_VATTR;
+	
+	CFSDEBUG( CFS_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n",
+				    VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
+    } else {
+	*vpp = (struct vnode *)0;
+	CFSDEBUG(CFS_MKDIR, myprintf(("mkdir error %d\n",error));)
+    }
+
+    /*
+     * Currently, all mkdirs explicitly vput their dvp's.
+     * It also appears that we *must* lock the vpp, since
+     * lockleaf isn't set, but someone down the road is going
+     * to try to unlock the new directory.
+     */
+#ifdef	__FreeBSD_version
+    /*
+     * Well, FreeBSD -current does the vrele/vput put in
+     * kern/vfs_syscalls.c:mkdir()
+     */
+#else
+    vput(dvp);
+    if (!error) {
+	if ((error = VOP_X_LOCK(*ap->a_vpp, LK_EXCLUSIVE))) {
+	    panic("cfs_mkdir: couldn't lock child");
+	}
+    }
+#endif
+
+    /* Have to free the previously saved name */
+    /* 
+     * ufs_mkdir doesn't check for SAVESTART before freeing the
+     * pathname buffer, but ufs_create does.  For the moment, I'll
+     * follow their lead, but this seems like it is probably
+     * incorrect.  
+     */
+    NAMEI_FREE(cnp->cn_pnbuf);
+    return(error);
+}
+
+int
+cfs_rmdir(v)
+    void *v;
+{
+/* true args */
+    struct vop_rmdir_args *ap = v;
+    struct vnode *dvp = ap->a_dvp;
+    struct cnode *dcp = VTOC(dvp);
+    struct componentname  *cnp = ap->a_cnp;
+    struct ucred *cred = cnp->cn_cred;
+    struct proc *p = cnp->cn_proc;
+/* true args */
+    int error;
+    const char *nm = cnp->cn_nameptr;
+    int len = cnp->cn_namelen;
+    struct cnode *cp;
+   
+    MARK_ENTRY(CFS_RMDIR_STATS);
+
+    /* Check for rmdir of control object. */
+    if (IS_CTL_NAME(dvp, nm, len)) {
+	MARK_INT_FAIL(CFS_RMDIR_STATS);
+	return(ENOENT);
+    }
+
+    /* We're being conservative here, it might be that this person
+     * doesn't really have sufficient access to delete the file
+     * but we feel zapping the entry won't really hurt anyone -- dcs
+     */
+    /*
+     * As a side effect of the rmdir, remove any entries for children of
+     * the directory, especially "." and "..".
+     */
+    cp = cfsnc_lookup(dcp, nm, len, cred);
+    if (cp) cfsnc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL);
+
+    /* Remove the file's entry from the CFS Name Cache */
+    cfsnc_zapfile(dcp, nm, len);
+
+    /* Invalidate the parent's attr cache, the modification time has changed */
+    dcp->c_flags &= ~C_VATTR;
+
+    error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p);
+
+    CFSDEBUG(CFS_RMDIR, myprintf(("in rmdir result %d\n", error)); )
+
+#ifdef	__FreeBSD_version
+    /*
+     * Well, FreeBSD -current does the vrele/vput put in
+     * kern/vfs_syscalls.c:rmdir()
+     */
+#else
+    /*
+     * regardless of what happens, we need to drop locks/refs on the 
+     * parent and child.  I think. 
+     */
+    if (dvp == ap->a_vp) {
+	vrele(ap->a_vp);
+    } else {
+	vput(ap->a_vp);
+    }
+    vput(dvp);
+#endif
+
+    if ((cnp->cn_flags & SAVESTART) == 0) {
+	NAMEI_FREE(cnp->cn_pnbuf);
+    }
+    return(error);
+}
+
+int
+cfs_symlink(v)
+    void *v;
+{
+/* true args */
+    struct vop_symlink_args *ap = v;
+    struct vnode *tdvp = ap->a_dvp;
+    struct cnode *tdcp = VTOC(tdvp);	
+    struct componentname *cnp = ap->a_cnp;
+    struct vattr *tva = ap->a_vap;
+    char *path = ap->a_target;
+    struct ucred *cred = cnp->cn_cred;
+    struct proc *p = cnp->cn_proc;
+/* locals */
+    int error;
+    /* 
+     * XXX I'm assuming the following things about cfs_symlink's
+     * arguments: 
+     *       t(foo) is the new name/parent/etc being created.
+     *       lname is the contents of the new symlink. 
+     */
+#ifdef	NetBSD1_3
+    const 
+#endif
+          char *nm = cnp->cn_nameptr;
+    int len = cnp->cn_namelen;
+    int plen = strlen(path);
+
+    /* XXX What about the vpp argument?  Do we need it? */
+    /* 
+     * Here's the strategy for the moment: perform the symlink, then
+     * do a lookup to grab the resulting vnode.  I know this requires
+     * two communications with Venus for a new sybolic link, but
+     * that's the way the ball bounces.  I don't yet want to change
+     * the way the Mach symlink works.  When Mach support is
+     * deprecated, we should change symlink so that the common case
+     * returns the resultant vnode in a vpp argument.
+     */
+
+    MARK_ENTRY(CFS_SYMLINK_STATS);
+
+    /* Check for symlink of control object. */
+    if (IS_CTL_NAME(tdvp, nm, len)) {
+	MARK_INT_FAIL(CFS_SYMLINK_STATS);
+	return(EACCES);
+    }
+
+    if (plen+1 > CFS_MAXPATHLEN) {
+	MARK_INT_FAIL(CFS_SYMLINK_STATS);
+	return(EINVAL);
+    }
+
+    if (len+1 > CFS_MAXNAMLEN) {
+	MARK_INT_FAIL(CFS_SYMLINK_STATS);
+	error = EINVAL;
+	goto exit;
+    }
+
+    error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p);
+
+    /* Invalidate the parent's attr cache, the modification time has changed */
+    tdcp->c_flags &= ~C_VATTR;
+
+#ifdef	__FreeBSD_version
+
+#else
+    if (!error)
+    {
+	struct nameidata nd;
+	NDINIT(&nd, LOOKUP, FOLLOW|LOCKLEAF, UIO_SYSSPACE, nm, p);
+	nd.ni_cnd.cn_cred = cred;
+	nd.ni_loopcnt = 0;
+	nd.ni_startdir = tdvp;
+	nd.ni_cnd.cn_pnbuf = (char *)nm;
+	nd.ni_cnd.cn_nameptr = nd.ni_cnd.cn_pnbuf;
+	nd.ni_pathlen = len;
+	vput(tdvp);
+	error = lookup(&nd);
+	*ap->a_vpp = nd.ni_vp;
+    }
+
+    /* 
+     * Okay, now we have to drop locks on dvp.  vpp is unlocked, but
+     * ref'd.  It doesn't matter what happens in either symlink or
+     * lookup.  Furthermore, there isn't any way for (dvp == *vpp), so
+     * we don't bother checking.  
+     */
+/*  vput(ap->a_dvp);		released earlier */
+    if (*ap->a_vpp) {
+    	VOP_X_UNLOCK(*ap->a_vpp, 0);	/* this line is new!! It is necessary because lookup() calls
+				   VOP_LOOKUP (cfs_lookup) which returns vpp locked.  cfs_nb_lookup
+				   merged with cfs_lookup() to become cfs_lookup so UNLOCK is
+				   necessary */
+    	vrele(*ap->a_vpp);
+    }
+#endif
+
+    /* 
+     * Free the name buffer 
+     */
+    if ((cnp->cn_flags & SAVESTART) == 0) {
+	NAMEI_FREE(cnp->cn_pnbuf);
+    }
+
+ exit:    
+    CFSDEBUG(CFS_SYMLINK, myprintf(("in symlink result %d\n",error)); )
+    return(error);
+}
+
+/*
+ * Read directory entries.
+ */
+int
+cfs_readdir(v)
+    void *v;
+{
+/* true args */
+    struct vop_readdir_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+    register struct uio *uiop = ap->a_uio;
+    struct ucred *cred = ap->a_cred;
+    int *eofflag = ap->a_eofflag;
+#if	defined(__NetBSD__) && defined(NetBSD1_3) && (NetBSD1_3 >= 7)
+    off_t **cookies = ap->a_cookies;
+    int *ncookies = ap->a_ncookies;
+#elif	defined(NetBSD1_3)
+    off_t *cookies = ap->a_cookies;
+    int ncookies = ap->a_ncookies;
+#elif	NetBSD1_2
+    u_long *cookies = ap->a_cookies;
+    int ncookies = ap->a_ncookies;
+#elif	defined(__FreeBSD__) && defined(__FreeBSD_version)
+    u_long **cookies = ap->a_cookies;
+    int *ncookies = ap->a_ncookies;
+#elif	defined(__FreeBSD__)
+    u_int **cookies = ap->a_cookies;
+    int *ncookies = ap->a_ncookies;
+#endif
+    struct proc *p = ap->a_uio->uio_procp;
+/* upcall decl */
+/* locals */
+    int error = 0;
+
+    MARK_ENTRY(CFS_READDIR_STATS);
+
+    CFSDEBUG(CFS_READDIR, myprintf(("cfs_readdir(%p, %d, %qd, %d)\n", uiop->uio_iov->iov_base, uiop->uio_resid, uiop->uio_offset, uiop->uio_segflg)); )
+	
+    /* Check for readdir of control object. */
+    if (IS_CTL_VP(vp)) {
+	MARK_INT_FAIL(CFS_READDIR_STATS);
+	return(ENOENT);
+    }
+
+    if (cfs_intercept_rdwr) {
+	/* Redirect the request to UFS. */
+	
+	/* If directory is not already open do an "internal open" on it. */
+	int opened_internally = 0;
+	if (cp->c_ovp == NULL) {
+	    opened_internally = 1;
+	    MARK_INT_GEN(CFS_OPEN_STATS);
+	    error = VOP_OPEN(vp, FREAD, cred, p);
+printf("cfs_readdir: Internally Opening %p\n", vp);
+#ifdef	__FreeBSD__
+	    if (error) {
+		printf("cfs_readdir: VOP_OPEN on container failed %d\n", error);
+		return (error);
+	    }
+	    if (vp->v_type == VREG) {
+		error = vfs_object_create(vp, p, cred, 1);
+		if (error != 0) {
+		    printf("cfs_readdir: vfs_object_create() returns %d\n", error);
+		    vput(vp);
+		}
+	    }
+#endif
+	    if (error) return(error);
+	}
+	
+	/* Have UFS handle the call. */
+	CFSDEBUG(CFS_READDIR, myprintf(("indirect readdir: fid = (%lx.%lx.%lx), refcnt = %d\n",cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique, vp->v_usecount)); )
+#ifdef	__NetBSD__
+	error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, cookies,
+			       ncookies);
+#elif	defined(__FreeBSD__)
+	error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies,
+			       cookies);
+#endif
+	
+	if (error)
+	    MARK_INT_FAIL(CFS_READDIR_STATS);
+	else
+	    MARK_INT_SAT(CFS_READDIR_STATS);
+	
+	/* Do an "internal close" if necessary. */ 
+	if (opened_internally) {
+	    MARK_INT_GEN(CFS_CLOSE_STATS);
+	    (void)VOP_CLOSE(vp, FREAD, cred, p);
+	}
+    }
+    else {
+	/* Read the block from Venus. */
+	struct iovec *iovp = uiop->uio_iov;
+	unsigned count = iovp->iov_len;
+	int size;
+	
+	
+	/* Make the count a multiple of DIRBLKSIZ (borrowed from ufs_readdir). */	
+#define DIRBLKSIZ DEV_BSIZE
+	if ((uiop->uio_iovcnt != 1) || (count < DIRBLKSIZ) ||
+	    (uiop->uio_offset & (DIRBLKSIZ - 1)))
+	    return (EINVAL);
+	count &= ~(DIRBLKSIZ - 1);
+	uiop->uio_resid -= iovp->iov_len - count;
+	iovp->iov_len = count;
+	if (count > VC_MAXDATASIZE)
+	    return(EINVAL);
+	
+	
+	error = venus_readdir(vtomi(CTOV(cp)), &cp->c_fid, count, uiop->uio_offset, cred, p, iovp->iov_base, &size);
+	
+	CFSDEBUG(CFS_READDIR,
+		 myprintf(("cfs_readdir(%p, %d, %qd, %d) returns (%d, %d)\n",
+			iovp->iov_base, count,
+			uiop->uio_offset, uiop->uio_segflg, error,
+			size)); )	
+	if (!error) {
+	    iovp->iov_base += size;
+	    iovp->iov_len -= size;
+	    uiop->uio_resid -= size;
+	    uiop->uio_offset += size;
+	}
+    }
+
+    return(error);
+}
+
+/*
+ * Convert from file system blocks to device blocks
+ */
+int
+cfs_bmap(v)
+    void *v;
+{
+    /* XXX on the global proc */
+/* true args */
+    struct vop_bmap_args *ap = v;
+    struct vnode *vp __attribute__((unused)) = ap->a_vp;	/* file's vnode */
+    daddr_t bn __attribute__((unused)) = ap->a_bn;	/* fs block number */
+    struct vnode **vpp = ap->a_vpp;			/* RETURN vp of device */
+    daddr_t *bnp __attribute__((unused)) = ap->a_bnp;	/* RETURN device block number */
+    struct proc *p __attribute__((unused)) = curproc;
+/* upcall decl */
+/* locals */
+
+#ifdef	__FreeBSD__
+#ifdef	__FreeBSD_version
+	int ret = 0;
+	struct cnode *cp;
+
+	cp = VTOC(vp);
+	if (cp->c_ovp) {
+		printf("cfs_bmap: container .. ");
+		ret =  VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb);
+		printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %p, ap->a_runp %p, ap->a_runb %p) = %d\n",
+			cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret);
+		return ret;
+	} else {
+		printf("cfs_bmap: no container\n");
+		return(EOPNOTSUPP);
+	}
+#else
+        /* Just like nfs_bmap(). Do not touch *vpp, this cause pfault. */
+	return(EOPNOTSUPP);
+#endif
+#else	/* !FreeBSD */
+	*vpp = (struct vnode *)0;
+	myprintf(("cfs_bmap called!\n"));
+	return(EINVAL);
+#endif
+}
+
+/*
+ * I don't think the following two things are used anywhere, so I've
+ * commented them out 
+ * 
+ * struct buf *async_bufhead; 
+ * int async_daemon_count;
+ */
+int
+cfs_strategy(v)
+    void *v;
+{
+/* true args */
+    struct vop_strategy_args *ap = v;
+    register struct buf *bp __attribute__((unused)) = ap->a_bp;
+    struct proc *p __attribute__((unused)) = curproc;
+/* upcall decl */
+/* locals */
+
+#ifdef	__FreeBSD__
+#ifdef	__FreeBSD_version
+	printf("cfs_strategy: called ???\n");
+	return(EOPNOTSUPP);
+#else	/* ! __MAYBE_FreeBSD__ */
+	myprintf(("cfs_strategy called!  "));
+	return(EOPNOTSUPP);
+#endif	/* __MAYBE_FreeBSD__ */
+#else	/* ! __FreeBSD__ */
+	myprintf(("cfs_strategy called!  "));
+	return(EINVAL);
+#endif	/* __FreeBSD__ */
+}
+
+int
+cfs_reclaim(v) 
+    void *v;
+{
+/* true args */
+    struct vop_reclaim_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+/* upcall decl */
+/* locals */
+
+/*
+ * Forced unmount/flush will let vnodes with non zero use be destroyed!
+ */
+    ENTRY;
+
+    if (IS_UNMOUNTING(cp)) {
+#ifdef	DEBUG
+	if (VTOC(vp)->c_ovp) {
+	    if (IS_UNMOUNTING(cp))
+		printf("cfs_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp);
+	}
+#endif
+    } else {
+#ifdef DIAGNOSTIC
+	if (vp->v_usecount != 0) 
+	    vprint("cfs_reclaim: pushing active", vp);
+	if (VTOC(vp)->c_ovp) {
+	    panic("cfs_reclaim: c_ovp not void");
+    }
+#endif DIAGNOSTIC
+    }	
+    cache_purge(vp);
+    cfs_free(VTOC(vp));
+    VTOC(vp) = NULL;
+    return (0);
+}
+
+#ifdef	NEW_LOCKMGR
+int
+cfs_lock(v)
+    void *v;
+{
+/* true args */
+    struct vop_lock_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+#ifdef	__FreeBSD_version
+    struct proc  *p = ap->a_p;
+#endif
+/* upcall decl */
+/* locals */
+
+    ENTRY;
+
+    if (cfs_lockdebug) {
+	myprintf(("Attempting lock on %lx.%lx.%lx\n",
+		  cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
+    }
+
+    return (NEW_LOCKMGR(&cp->c_lock, ap->a_flags, &vp->v_interlock));
+}
+
+int
+cfs_unlock(v)
+    void *v;
+{
+/* true args */
+    struct vop_unlock_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp = VTOC(vp);
+#ifdef	__FreeBSD_version
+    struct proc  *p = ap->a_p;
+#endif
+/* upcall decl */
+/* locals */
+
+    ENTRY;
+    if (cfs_lockdebug) {
+	myprintf(("Attempting unlock on %lx.%lx.%lx\n",
+		  cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
+    }
+
+    return (NEW_LOCKMGR(&cp->c_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock));
+}
+
+int
+cfs_islocked(v)
+    void *v;
+{
+/* true args */
+    struct vop_islocked_args *ap = v;
+    struct cnode *cp = VTOC(ap->a_vp);
+    ENTRY;
+
+    return (lockstatus(&cp->c_lock));
+}
+#else
+int
+cfs_lock(v)
+    void *v;
+{
+/* true args */
+    struct vop_lock_args *ap = v;
+    struct vnode *vp = ap->a_vp;
+    struct cnode *cp;
+    struct proc  *p __attribute__((unused)) = curproc; /* XXX */
+/* upcall decl */
+/* locals */
+
+    ENTRY;
+    cp = VTOC(vp);
+
+    if (cfs_lockdebug) {
+	myprintf(("Attempting lock on %lx.%lx.%lx\n",
+		  cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
+    }
+start:
+    while (vp->v_flag & VXLOCK) {
+	vp->v_flag |= VXWANT;
+#ifdef	__NetBSD__
+	(void) sleep((caddr_t)vp, PINOD);
+#elif	defined(__FreeBSD__)
+	(void) tsleep((caddr_t)vp, PINOD, "cfs_lock1", 0);
+#endif
+    }
+    if (vp->v_tag == VT_NON)
+	return (ENOENT);
+
+    if (cp->c_flags & C_LOCKED) {
+	cp->c_flags |= C_WANTED;
+#ifdef DIAGNOSTIC
+	myprintf(("cfs_lock: lock contention"));
+	cfsnc_name(cp);
+	myprintf(("\n"));
+#endif
+#ifdef	__NetBSD__
+	(void) sleep((caddr_t)cp, PINOD);
+#elif	defined(__FreeBSD__)
+	(void) tsleep((caddr_t)cp, PINOD, "cfs_lock2", 0);
+#endif
+#ifdef DIAGNOSTIC
+	myprintf(("cfs_lock: contention resolved\n"));
+#endif
+	goto start;
+    }
+    cp->c_flags |= C_LOCKED;
+    return (0);
+}
+
+int
+cfs_unlock(v)
+    void *v;
+{
+/* true args */
+    struct vop_unlock_args *ap = v;
+    struct cnode *cp = VTOC(ap->a_vp);
+/* upcall decl */
+/* locals */
+
+    ENTRY;
+    if (cfs_lockdebug) {
+	myprintf(("Attempting unlock on %lx.%lx.%lx\n",
+		  cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
+    }
+#ifdef DIAGNOSTIC
+    if ((cp->c_flags & C_LOCKED) == 0) 
+	panic("cfs_unlock: not locked");
+#endif
+    cp->c_flags &= ~C_LOCKED;
+    if (cp->c_flags & C_WANTED) {
+	cp->c_flags &= ~C_WANTED;
+	wakeup((caddr_t)cp);
+    }
+    return (0);
+}
+
+int
+cfs_islocked(v)
+    void *v;
+{
+/* true args */
+    struct vop_islocked_args *ap = v;
+
+    ENTRY;
+    if (VTOC(ap->a_vp)->c_flags & C_LOCKED)
+	return (1);
+    return (0);
+}
+#endif
+
+/* How one looks up a vnode given a device/inode pair: */
+int
+cfs_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp)
+{
+    /* This is like VFS_VGET() or igetinode()! */
+    int           error;
+    struct mount *mp;
+
+    if (!(mp = devtomp(dev))) {
+	myprintf(("cfs_grab_vnode: devtomp(%d) returns NULL\n", dev));
+	return(ENXIO);
+    }
+
+    /* XXX - ensure that nonzero-return means failure */
+    error = VFS_VGET(mp,ino,vpp);
+    if (error) {
+	myprintf(("cfs_grab_vnode: iget/vget(%d, %d) returns %p, err %d\n", 
+		  dev, ino, *vpp, error));
+	return(ENOENT);
+    }
+    return(0);
+}
+
+void
+print_vattr( attr )
+	struct vattr *attr;
+{
+    char *typestr;
+
+    switch (attr->va_type) {
+    case VNON:
+	typestr = "VNON";
+	break;
+    case VREG:
+	typestr = "VREG";
+	break;
+    case VDIR:
+	typestr = "VDIR";
+	break;
+    case VBLK:
+	typestr = "VBLK";
+	break;
+    case VCHR:
+	typestr = "VCHR";
+	break;
+    case VLNK:
+	typestr = "VLNK";
+	break;
+    case VSOCK:
+	typestr = "VSCK";
+	break;
+    case VFIFO:
+	typestr = "VFFO";
+	break;
+    case VBAD:
+	typestr = "VBAD";
+	break;
+    default:
+	typestr = "????";
+	break;
+    }
+
+
+    myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n",
+	      typestr, (int)attr->va_mode, (int)attr->va_uid,
+	      (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev));
+
+    myprintf(("      fileid %d nlink %d size %d blocksize %d bytes %d\n",
+	      (int)attr->va_fileid, (int)attr->va_nlink, 
+	      (int)attr->va_size,
+	      (int)attr->va_blocksize,(int)attr->va_bytes));
+    myprintf(("      gen %ld flags %ld vaflags %d\n",
+	      attr->va_gen, attr->va_flags, attr->va_vaflags));
+    myprintf(("      atime sec %d nsec %d\n",
+	      (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec));
+    myprintf(("      mtime sec %d nsec %d\n",
+	      (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec));
+    myprintf(("      ctime sec %d nsec %d\n",
+	      (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec));
+}
+
+/* How to print a ucred */
+void
+print_cred(cred)
+	struct ucred *cred;
+{
+
+	int i;
+
+	myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid));
+
+	for (i=0; i < cred->cr_ngroups; i++)
+		myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i]));
+	myprintf(("\n"));
+
+}
+
+/*
+  -----------------------------------------------------------------------------------
+ */
+
+/*
+ * Return a vnode for the given fid.
+ * If no cnode exists for this fid create one and put it
+ * in a table hashed by fid.Volume and fid.Vnode.  If the cnode for
+ * this fid is already in the table return it (ref count is
+ * incremented by cfs_find.  The cnode will be flushed from the
+ * table when cfs_inactive calls cfs_unsave.
+ */
+struct cnode *
+makecfsnode(fid, vfsp, type)
+     ViceFid *fid; struct mount *vfsp; short type;
+{
+    struct cnode *cp;
+    int          err;
+
+    if ((cp = cfs_find(fid)) == NULL) {
+	struct vnode *vp;
+	
+	cp = cfs_alloc();
+#ifdef	NEW_LOCKMGR
+	lockinit(&cp->c_lock, PINOD, "cnode", 0, 0);
+#endif
+	cp->c_fid = *fid;
+	
+	err = getnewvnode(VT_CFS, vfsp, cfs_vnodeop_p, &vp);  
+	if (err) {                                                
+	    panic("cfs: getnewvnode returned error %d\n", err);   
+	}                                                         
+	vp->v_data = cp;                                          
+	vp->v_type = type;                                      
+	cp->c_vnode = vp;                                         
+	cfs_save(cp);
+	
+    } else {
+	vref(CTOV(cp));
+    }
+
+    return cp;
+}
+
+
+
+#ifdef MACH
+/*
+ * read a logical block and return it in a buffer */
+int
+cfs_bread(vp, lbn, bpp)
+    struct vnode *vp;
+    daddr_t lbn;
+    struct buf **bpp; 
+{
+    myprintf(("cfs_bread called!\n"));
+    return(EINVAL);
+}
+
+/*
+ * release a block returned by cfs_bread
+ */
+int
+cfs_brelse(vp, bp)
+    struct vnode *vp;
+    struct buf *bp; 
+{
+
+    myprintf(("cfs_brelse called!\n"));
+    return(EINVAL);
+}
+
+int
+cfs_badop()
+{
+	panic("cfs_badop");
+}
+
+int
+cfs_noop()
+{
+	return (EINVAL);
+}
+
+int
+cfs_fid(vp, fidpp)
+	struct vnode *vp;
+	struct fid **fidpp;
+{
+	struct cfid *cfid;
+
+	cfid = (struct cfid *)kalloc(sizeof(struct cfid));
+	bzero((caddr_t)cfid, sizeof(struct cfid));
+	cfid->cfid_len = sizeof(struct cfid) - (sizeof(struct fid) - MAXFIDSZ);
+	cfid->cfid_fid = VTOC(vp)->c_fid;
+	*fidpp = (struct fid *)cfid;
+	return (0);
+}
+
+int
+cfs_freefid(vp, fidp)
+	struct vnode *vp;
+	struct fid *fidp;
+{
+	kfree((struct cfid *)fidp, sizeof(struct cfid));
+	return (0);
+}
+
+/*
+ * Record-locking requests are passed to the local Lock-Manager daemon.
+ */
+int
+cfs_lockctl(vp, ld, cmd, cred)
+	struct vnode *vp;
+	struct flock *ld;
+	int cmd;
+	struct ucred *cred;
+{ 
+	myprintf(("cfs_lockctl called!\n"));
+	return(EINVAL);
+}
+
+cfs_page_read(vp, buffer, size, offset, cred)
+	struct vnode	*vp;
+	caddr_t		buffer;
+	int		size;
+	vm_offset_t	offset;
+	struct ucred *cred;
+{ 
+	struct cnode *cp = VTOC(vp);
+	struct uio uio;
+	struct iovec iov;
+	int error = 0;
+
+	CFSDEBUG(CFS_RDWR, myprintf(("cfs_page_read(%p, %d, %d), fid = (%lx.%lx.%lx), refcnt = %d\n", buffer, size, offset, VTOC(vp)->c_fid.Volume, VTOC(vp)->c_fid.Vnode, VTOC(vp)->c_fid.Unique, vp->v_count)); )
+
+	iov.iov_base = buffer;
+	iov.iov_len = size;
+	uio.uio_iov = &iov;
+	uio.uio_iovcnt = 1;
+	uio.uio_offset = offset;
+	uio.uio_segflg = UIO_SYSSPACE;
+	uio.uio_resid = size;
+	error = cfs_rdwr(vp, &uio, UIO_READ, 0, cred);
+	if (error) {
+	    myprintf(("error %d on pagein (cfs_rdwr)\n", error));
+	    error = EIO;
+	}
+
+/*
+	if (!error && (cp->states & CWired) == 0)
+	    cfs_Wire(cp);
+*/
+
+	return(error);
+}
+
+cfs_page_write(vp, buffer, size, offset, cred, init)
+	struct vnode	*vp;
+	caddr_t buffer;
+	int size;
+	vm_offset_t	offset;
+	struct ucred *cred;
+	boolean_t init;
+{
+	struct cnode *cp = VTOC(vp);
+	struct uio uio;
+	struct iovec iov;
+	int error = 0;
+
+	CFSDEBUG(CFS_RDWR, myprintf(("cfs_page_write(%p, %d, %d), fid = (%lx.%lx.%lx), refcnt = %d\n", buffer, size, offset, VTOC(vp)->c_fid.Volume, VTOC(vp)->c_fid.Vnode, VTOC(vp)->c_fid.Unique, vp->v_count)); )
+
+	if (init) {
+	    panic("cfs_page_write: called from data_initialize");
+	}
+
+	iov.iov_base = buffer;
+	iov.iov_len = size;
+	uio.uio_iov = &iov;
+	uio.uio_iovcnt = 1;
+	uio.uio_offset = offset;
+	uio.uio_segflg = UIO_SYSSPACE;
+	uio.uio_resid = size;
+	error = cfs_rdwr(vp, &uio, UIO_WRITE, 0, cred);
+	if (error) {
+	    myprintf(("error %d on pageout (cfs_rdwr)\n", error));
+	    error = EIO;
+	}
+
+	return(error);
+}
+
+#endif
diff --git a/sys/fs/coda/coda_vnops.h b/sys/fs/coda/coda_vnops.h
new file mode 100644
index 0000000..697cb91
--- /dev/null
+++ b/sys/fs/coda/coda_vnops.h
@@ -0,0 +1,138 @@
+/*
+
+            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_vnodeops.h,v 1.7 1998/08/28 18:12:24 rvb Exp $ */
+
+/* 
+ * Mach Operating System
+ * Copyright (c) 1990 Carnegie-Mellon University
+ * 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_vnodeops.h,v $
+ * Revision 1.7  1998/08/28 18:12:24  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 1.6  1998/08/18 17:05:22  rvb
+ * Don't use __RCSID now
+ *
+ * Revision 1.5  1998/08/18 16:31:47  rvb
+ * Sync the code for NetBSD -current; test on 1.3 later
+ *
+ * Revision 1.4  98/01/23  11:53:49  rvb
+ * Bring RVB_CFS1_1 to HEAD
+ * 
+ * Revision 1.3.2.3  98/01/23  11:21:13  rvb
+ * Sync with 2.2.5
+ * 
+ * Revision 1.3.2.2  97/12/16  12:40:20  rvb
+ * Sync with 1.3
+ * 
+ * Revision 1.3.2.1  97/12/10  14:08:34  rvb
+ * Fix O_ flags; check result in cfscall
+ * 
+ * Revision 1.3  97/12/05  10:39:25  rvb
+ * Read CHANGES
+ * 
+ * Revision 1.2.34.2  97/11/20  11:46:54  rvb
+ * Capture current cfs_venus
+ * 
+ * Revision 1.2.34.1  97/11/13  22:03:04  rvb
+ * pass2 cfs_NetBSD.h mt
+ * 
+ * Revision 1.2  96/01/02  16:57:14  bnoble
+ * Added support for Coda MiniCache and raw inode calls (final commit)
+ * 
+ * Revision 1.1.2.1  1995/12/20 01:57:40  bnoble
+ * Added CFS-specific files
+ *
+ */
+
+
+/* NetBSD interfaces to the vnodeops */
+int cfs_open      __P((void *));
+int cfs_close     __P((void *));
+int cfs_read      __P((void *));
+int cfs_write     __P((void *));
+int cfs_ioctl     __P((void *));
+/* 1.3 int cfs_select    __P((void *));*/
+int cfs_getattr   __P((void *));
+int cfs_setattr   __P((void *));
+int cfs_access    __P((void *));
+int cfs_abortop   __P((void *));
+int cfs_readlink  __P((void *));
+int cfs_fsync     __P((void *));
+int cfs_inactive  __P((void *));
+int cfs_lookup    __P((void *));
+int cfs_create    __P((void *));
+int cfs_remove    __P((void *));
+int cfs_link      __P((void *));
+int cfs_rename    __P((void *));
+int cfs_mkdir     __P((void *));
+int cfs_rmdir     __P((void *));
+int cfs_symlink   __P((void *));
+int cfs_readdir   __P((void *));
+int cfs_bmap      __P((void *));
+int cfs_strategy  __P((void *));
+int cfs_reclaim   __P((void *));
+int cfs_lock      __P((void *));
+int cfs_unlock    __P((void *));
+int cfs_islocked  __P((void *));
+int nbsd_vop_error   __P((void *));
+int nbsd_vop_nop     __P((void *));
+#ifdef __FreeBSD__
+int fbsd_vnotsup  __P((void *ap));
+#ifdef	__FreeBSD_version
+int cfs_fbsd_getpages	__P((void *));
+int cfs_fbsd_putpages	__P((void *));
+#endif
+#endif
+
+int (**cfs_vnodeop_p)(void *);
+int cfs_rdwr(struct vnode *vp, struct uio *uiop, enum uio_rw rw,
+    int ioflag, struct ucred *cred, struct proc *p);
+
+
+
+int cfs_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp);
+void print_vattr(struct vattr *attr);
+void print_cred(struct ucred *cred);