Very Preliminary Coda

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diff --git a/sys/coda/cnode.h b/sys/coda/cnode.h
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+/*
+
+            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_ */
+