Very Preliminary Coda

1 files changed, 241 insertions, 0 deletions

diff --git a/sys/coda/coda_fbsd.c b/sys/coda/coda_fbsd.c
new file mode 100644
index 0000000..23d55cc
--- /dev/null
+++ b/sys/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