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Diffstat (limited to 'sys/coda/coda_fbsd.c')
-rw-r--r-- | sys/coda/coda_fbsd.c | 241 |
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 |