BSD 4.4 Lite Kernel Sources

1 files changed, 759 insertions, 0 deletions

diff --git a/sys/miscfs/kernfs/kernfs_vnops.c b/sys/miscfs/kernfs/kernfs_vnops.c
new file mode 100644
index 0000000..10b7d7c
--- /dev/null
+++ b/sys/miscfs/kernfs/kernfs_vnops.c
@@ -0,0 +1,759 @@
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software donated to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)kernfs_vnops.c	8.6 (Berkeley) 2/10/94
+ */
+
+/*
+ * Kernel parameter filesystem (/kern)
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/vmmeter.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/proc.h>
+#include <sys/vnode.h>
+#include <sys/malloc.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+#include <sys/namei.h>
+#include <sys/buf.h>
+#include <sys/dirent.h>
+#include <miscfs/kernfs/kernfs.h>
+
+#define KSTRING	256		/* Largest I/O available via this filesystem */
+#define	UIO_MX 32
+
+#define	READ_MODE	(S_IRUSR|S_IRGRP|S_IROTH)
+#define	WRITE_MODE	(S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH)
+#define DIR_MODE	(S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
+
+struct kern_target {
+	char *kt_name;
+	void *kt_data;
+#define	KTT_NULL 1
+#define	KTT_TIME 5
+#define KTT_INT	17
+#define	KTT_STRING 31
+#define KTT_HOSTNAME 47
+#define KTT_AVENRUN 53
+	int kt_tag;
+	int kt_rw;
+	int kt_vtype;
+} kern_targets[] = {
+/* NOTE: The name must be less than UIO_MX-16 chars in length */
+	/* name		data		tag		ro/rw */
+	{ ".",		0,		KTT_NULL,	VREAD,		VDIR },
+	{ "..",		0,		KTT_NULL,	VREAD,		VDIR },
+	{ "boottime",	&boottime.tv_sec, KTT_INT,	VREAD,		VREG },
+	{ "copyright",	copyright,	KTT_STRING,	VREAD,		VREG },
+	{ "hostname",	0,		KTT_HOSTNAME,	VREAD|VWRITE,	VREG },
+	{ "hz",		&hz,		KTT_INT,	VREAD,		VREG },
+	{ "loadavg",	0,		KTT_AVENRUN,	VREAD,		VREG },
+	{ "pagesize",	&cnt.v_page_size, KTT_INT,	VREAD,		VREG },
+	{ "physmem",	&physmem,	KTT_INT,	VREAD,		VREG },
+#if 0
+	{ "root",	0,		KTT_NULL,	VREAD,		VDIR },
+#endif
+	{ "rootdev",	0,		KTT_NULL,	VREAD,		VBLK },
+	{ "rrootdev",	0,		KTT_NULL,	VREAD,		VCHR },
+	{ "time",	0,		KTT_TIME,	VREAD,		VREG },
+	{ "version",	version,	KTT_STRING,	VREAD,		VREG },
+};
+
+static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]);
+
+static int
+kernfs_xread(kt, buf, len, lenp)
+	struct kern_target *kt;
+	char *buf;
+	int len;
+	int *lenp;
+{
+	switch (kt->kt_tag) {
+	case KTT_TIME: {
+		struct timeval tv;
+		microtime(&tv);
+		sprintf(buf, "%d %d\n", tv.tv_sec, tv.tv_usec);
+		break;
+	}
+
+	case KTT_INT: {
+		int *ip = kt->kt_data;
+		sprintf(buf, "%d\n", *ip);
+		break;
+	}
+
+	case KTT_STRING: {
+		char *cp = kt->kt_data;
+		int xlen = strlen(cp) + 1;
+
+		if (xlen >= len)
+			return (EINVAL);
+
+		bcopy(cp, buf, xlen);
+		break;
+	}
+
+	case KTT_HOSTNAME: {
+		char *cp = hostname;
+		int xlen = hostnamelen;
+
+		if (xlen >= (len-2))
+			return (EINVAL);
+
+		bcopy(cp, buf, xlen);
+		buf[xlen] = '\n';
+		buf[xlen+1] = '\0';
+		break;
+	}
+
+	case KTT_AVENRUN:
+		sprintf(buf, "%ld %ld %ld %ld\n",
+				averunnable.ldavg[0],
+				averunnable.ldavg[1],
+				averunnable.ldavg[2],
+				averunnable.fscale);
+		break;
+
+	default:
+		return (EINVAL);
+	}
+
+	*lenp = strlen(buf);
+	return (0);
+}
+
+static int
+kernfs_xwrite(kt, buf, len)
+	struct kern_target *kt;
+	char *buf;
+	int len;
+{
+	switch (kt->kt_tag) {
+	case KTT_HOSTNAME: {
+		if (buf[len-1] == '\n')
+			--len;
+		bcopy(buf, hostname, len);
+		hostname[len] = '\0';
+		hostnamelen = len;
+		return (0);
+	}
+
+	default:
+		return (EIO);
+	}
+}
+
+
+/*
+ * vp is the current namei directory
+ * ndp is the name to locate in that directory...
+ */
+kernfs_lookup(ap)
+	struct vop_lookup_args /* {
+		struct vnode * a_dvp;
+		struct vnode ** a_vpp;
+		struct componentname * a_cnp;
+	} */ *ap;
+{
+	struct vnode **vpp = ap->a_vpp;
+	struct vnode *dvp = ap->a_dvp;
+	struct componentname *cnp = ap->a_cnp;
+	struct vnode *fvp;
+	int error, i;
+	char *pname;
+
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_lookup(%x)\n", ap);
+	printf("kernfs_lookup(dp = %x, vpp = %x, cnp = %x)\n", dvp, vpp, ap->a_cnp);
+#endif
+	pname = cnp->cn_nameptr;
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_lookup(%s)\n", pname);
+#endif
+	if (cnp->cn_namelen == 1 && *pname == '.') {
+		*vpp = dvp;
+		VREF(dvp);
+		/*VOP_LOCK(dvp);*/
+		return (0);
+	}
+
+#if 0
+	if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) {
+		*vpp = rootdir;
+		VREF(rootdir);
+		VOP_LOCK(rootdir);
+		return (0);
+	}
+#endif
+
+	/*
+	 * /kern/rootdev is the root device
+	 */
+	if (cnp->cn_namelen == 7 && bcmp(pname, "rootdev", 7) == 0) {
+		*vpp = rootvp;
+		VREF(rootvp);
+		VOP_LOCK(rootvp);
+		return (0);
+	}
+
+	/*
+	 * /kern/rrootdev is the raw root device
+	 */
+	if (cnp->cn_namelen == 8 && bcmp(pname, "rrootdev", 8) == 0) {
+		if (rrootvp) {
+			*vpp = rrootvp;
+			VREF(rrootvp);
+			VOP_LOCK(rrootvp);
+			return (0);
+		}
+		error = ENXIO;
+		goto bad;
+	}
+
+	error = ENOENT;
+
+	for (i = 0; i < nkern_targets; i++) {
+		struct kern_target *kt = &kern_targets[i];
+		if (cnp->cn_namelen == strlen(kt->kt_name) &&
+		    bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0) {
+			error = 0;
+			break;
+		}
+	}
+
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_lookup: i = %d, error = %d\n", i, error);
+#endif
+
+	if (error)
+		goto bad;
+
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_lookup: allocate new vnode\n");
+#endif
+	error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p, &fvp);
+	if (error)
+		goto bad;
+	MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP, M_WAITOK);
+	VTOKERN(fvp)->kf_kt = &kern_targets[i];
+	fvp->v_type = VTOKERN(fvp)->kf_kt->kt_vtype;
+	*vpp = fvp;
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_lookup: newvp = %x\n", fvp);
+#endif
+	return (0);
+
+bad:;
+	*vpp = NULL;
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_lookup: error = %d\n", error);
+#endif
+	return (error);
+}
+
+kernfs_open(ap)
+	struct vop_open_args /* {
+		struct vnode *a_vp;
+		int  a_mode;
+		struct ucred *a_cred;
+		struct proc *a_p;
+	} */ *ap;
+{
+	struct vnode *vp = ap->a_vp;
+
+	/*
+	 * Can always open the root (modulo perms)
+	 */
+	if (vp->v_flag & VROOT)
+		return (0);
+
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_open, mode = %x, file = %s\n",
+			ap->a_mode, VTOKERN(vp)->kf_kt->kt_name);
+#endif
+
+	if ((ap->a_mode & FWRITE) && !(VTOKERN(vp)->kf_kt->kt_rw & VWRITE))
+		return (EOPNOTSUPP);
+
+	return (0);
+}
+
+static int
+kernfs_access(ap)
+	struct vop_access_args /* {
+		struct vnode *a_vp;
+		int  a_mode;
+		struct ucred *a_cred;
+		struct proc *a_p;
+	} */ *ap;
+{
+	struct vnode *vp = ap->a_vp;
+	struct ucred *cred = ap->a_cred;
+	mode_t mode = ap->a_mode;
+
+	if (mode & VEXEC) {
+		if (vp->v_flag & VROOT)
+			return (0);
+		return (EACCES);
+	}
+
+	if (cred->cr_uid == 0) {
+		if ((vp->v_flag & VROOT) == 0) {
+			struct kern_target *kt = VTOKERN(vp)->kf_kt;
+
+			if ((mode & VWRITE) && !(kt->kt_rw & VWRITE))
+				return (EROFS);
+		}
+		return (0);
+	}
+
+	if (mode & VWRITE)
+		return (EACCES);
+
+	return (0);
+}
+
+
+kernfs_getattr(ap)
+	struct vop_getattr_args /* {
+		struct vnode *a_vp;
+		struct vattr *a_vap;
+		struct ucred *a_cred;
+		struct proc *a_p;
+	} */ *ap;
+{
+	struct vnode *vp = ap->a_vp;
+	struct vattr *vap = ap->a_vap;
+	int error = 0;
+	char strbuf[KSTRING];
+
+	bzero((caddr_t) vap, sizeof(*vap));
+	vattr_null(vap);
+	vap->va_uid = 0;
+	vap->va_gid = 0;
+	vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
+	/* vap->va_qsize = 0; */
+	vap->va_blocksize = DEV_BSIZE;
+	microtime(&vap->va_atime);
+	vap->va_mtime = vap->va_atime;
+	vap->va_ctime = vap->va_ctime;
+	vap->va_gen = 0;
+	vap->va_flags = 0;
+	vap->va_rdev = 0;
+	/* vap->va_qbytes = 0; */
+	vap->va_bytes = 0;
+
+	if (vp->v_flag & VROOT) {
+#ifdef KERNFS_DIAGNOSTIC
+		printf("kernfs_getattr: stat rootdir\n");
+#endif
+		vap->va_type = VDIR;
+		vap->va_mode = DIR_MODE;
+		vap->va_nlink = 2;
+		vap->va_fileid = 2;
+		vap->va_size = DEV_BSIZE;
+	} else {
+		struct kern_target *kt = VTOKERN(vp)->kf_kt;
+		int nbytes;
+#ifdef KERNFS_DIAGNOSTIC
+		printf("kernfs_getattr: stat target %s\n", kt->kt_name);
+#endif
+		vap->va_type = kt->kt_vtype;
+		vap->va_mode = (kt->kt_rw & VWRITE ? WRITE_MODE : READ_MODE);
+		vap->va_nlink = 1;
+		vap->va_fileid = 3 + (kt - kern_targets) / sizeof(*kt);
+		error = kernfs_xread(kt, strbuf, sizeof(strbuf), &nbytes);
+		vap->va_size = nbytes;
+	}
+
+	vp->v_type = vap->va_type;
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_getattr: return error %d\n", error);
+#endif
+	return (error);
+}
+
+kernfs_setattr(ap)
+	struct vop_setattr_args /* {
+		struct vnode *a_vp;
+		struct vattr *a_vap;
+		struct ucred *a_cred;
+		struct proc *a_p;
+	} */ *ap;
+{
+
+	/*
+	 * Silently ignore attribute changes.
+	 * This allows for open with truncate to have no
+	 * effect until some data is written.  I want to
+	 * do it this way because all writes are atomic.
+	 */
+	return (0);
+}
+
+static int
+kernfs_read(ap)
+	struct vop_read_args /* {
+		struct vnode *a_vp;
+		struct uio *a_uio;
+		int  a_ioflag;
+		struct ucred *a_cred;
+	} */ *ap;
+{
+	struct vnode *vp = ap->a_vp;
+	struct uio *uio = ap->a_uio;
+	struct kern_target *kt;
+	char strbuf[KSTRING];
+	int off = uio->uio_offset;
+	int error, len;
+	char *cp;
+
+	if (vp->v_flag & VROOT)
+		return (EOPNOTSUPP);
+
+	kt = VTOKERN(vp)->kf_kt;
+
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kern_read %s\n", kt->kt_name);
+#endif
+
+	len = 0;
+	error = kernfs_xread(kt, strbuf, sizeof(strbuf), &len);
+	if (error)
+		return (error);
+	cp = strbuf + off;
+	len -= off;
+	return (uiomove(cp, len, uio));
+}
+
+static int
+kernfs_write(ap)
+	struct vop_write_args /* {
+		struct vnode *a_vp;
+		struct uio *a_uio;
+		int  a_ioflag;
+		struct ucred *a_cred;
+	} */ *ap;
+{
+	struct vnode *vp = ap->a_vp;
+	struct uio *uio = ap->a_uio;
+	struct kern_target *kt;
+	int error, xlen;
+	char strbuf[KSTRING];
+
+	if (vp->v_flag & VROOT)
+		return (0);
+
+	kt = VTOKERN(vp)->kf_kt;
+
+	if (uio->uio_offset != 0)
+		return (EINVAL);
+
+	xlen = min(uio->uio_resid, KSTRING-1);
+	error = uiomove(strbuf, xlen, uio);
+	if (error)
+		return (error);
+
+	if (uio->uio_resid != 0)
+		return (EIO);
+
+	strbuf[xlen] = '\0';
+	xlen = strlen(strbuf);
+	return (kernfs_xwrite(kt, strbuf, xlen));
+}
+
+
+kernfs_readdir(ap)
+	struct vop_readdir_args /* {
+		struct vnode *a_vp;
+		struct uio *a_uio;
+		struct ucred *a_cred;
+	} */ *ap;
+{
+	struct uio *uio = ap->a_uio;
+	int i;
+	int error;
+
+	i = uio->uio_offset / UIO_MX;
+	error = 0;
+	while (uio->uio_resid > 0 && i < nkern_targets) {
+		struct dirent d;
+		struct dirent *dp = &d;
+		struct kern_target *kt = &kern_targets[i];
+#ifdef KERNFS_DIAGNOSTIC
+		printf("kernfs_readdir: i = %d\n", i);
+#endif
+
+		bzero((caddr_t) dp, UIO_MX);
+
+		dp->d_namlen = strlen(kt->kt_name);
+		bcopy(kt->kt_name, dp->d_name, dp->d_namlen+1);
+
+#ifdef KERNFS_DIAGNOSTIC
+		printf("kernfs_readdir: name = %s, len = %d\n",
+				dp->d_name, dp->d_namlen);
+#endif
+		/*
+		 * Fill in the remaining fields
+		 */
+		dp->d_reclen = UIO_MX;
+		dp->d_fileno = i + 3;
+		dp->d_type = DT_UNKNOWN;	/* XXX */
+		/*
+		 * And ship to userland
+		 */
+		error = uiomove((caddr_t) dp, UIO_MX, uio);
+		if (error)
+			break;
+		i++;
+	}
+
+	uio->uio_offset = i * UIO_MX;
+
+	return (error);
+}
+
+kernfs_inactive(ap)
+	struct vop_inactive_args /* {
+		struct vnode *a_vp;
+	} */ *ap;
+{
+	struct vnode *vp = ap->a_vp;
+
+	/*
+	 * Clear out the v_type field to avoid
+	 * nasty things happening in vgone().
+	 */
+	vp->v_type = VNON;
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_inactive(%x)\n", vp);
+#endif
+	return (0);
+}
+
+kernfs_reclaim(ap)
+	struct vop_reclaim_args /* {
+		struct vnode *a_vp;
+	} */ *ap;
+{
+	struct vnode *vp = ap->a_vp;
+#ifdef KERNFS_DIAGNOSTIC
+	printf("kernfs_reclaim(%x)\n", vp);
+#endif
+	if (vp->v_data) {
+		FREE(vp->v_data, M_TEMP);
+		vp->v_data = 0;
+	}
+	return (0);
+}
+
+/*
+ * Return POSIX pathconf information applicable to special devices.
+ */
+kernfs_pathconf(ap)
+	struct vop_pathconf_args /* {
+		struct vnode *a_vp;
+		int a_name;
+		int *a_retval;
+	} */ *ap;
+{
+
+	switch (ap->a_name) {
+	case _PC_LINK_MAX:
+		*ap->a_retval = LINK_MAX;
+		return (0);
+	case _PC_MAX_CANON:
+		*ap->a_retval = MAX_CANON;
+		return (0);
+	case _PC_MAX_INPUT:
+		*ap->a_retval = MAX_INPUT;
+		return (0);
+	case _PC_PIPE_BUF:
+		*ap->a_retval = PIPE_BUF;
+		return (0);
+	case _PC_CHOWN_RESTRICTED:
+		*ap->a_retval = 1;
+		return (0);
+	case _PC_VDISABLE:
+		*ap->a_retval = _POSIX_VDISABLE;
+		return (0);
+	default:
+		return (EINVAL);
+	}
+	/* NOTREACHED */
+}
+
+/*
+ * Print out the contents of a /dev/fd vnode.
+ */
+/* ARGSUSED */
+kernfs_print(ap)
+	struct vop_print_args /* {
+		struct vnode *a_vp;
+	} */ *ap;
+{
+
+	printf("tag VT_KERNFS, kernfs vnode\n");
+	return (0);
+}
+
+/*void*/
+kernfs_vfree(ap)
+	struct vop_vfree_args /* {
+		struct vnode *a_pvp;
+		ino_t a_ino;
+		int a_mode;
+	} */ *ap;
+{
+
+	return (0);
+}
+
+/*
+ * /dev/fd vnode unsupported operation
+ */
+kernfs_enotsupp()
+{
+
+	return (EOPNOTSUPP);
+}
+
+/*
+ * /dev/fd "should never get here" operation
+ */
+kernfs_badop()
+{
+
+	panic("kernfs: bad op");
+	/* NOTREACHED */
+}
+
+/*
+ * kernfs vnode null operation
+ */
+kernfs_nullop()
+{
+
+	return (0);
+}
+
+#define kernfs_create ((int (*) __P((struct  vop_create_args *)))kernfs_enotsupp)
+#define kernfs_mknod ((int (*) __P((struct  vop_mknod_args *)))kernfs_enotsupp)
+#define kernfs_close ((int (*) __P((struct  vop_close_args *)))nullop)
+#define kernfs_ioctl ((int (*) __P((struct  vop_ioctl_args *)))kernfs_enotsupp)
+#define kernfs_select ((int (*) __P((struct  vop_select_args *)))kernfs_enotsupp)
+#define kernfs_mmap ((int (*) __P((struct  vop_mmap_args *)))kernfs_enotsupp)
+#define kernfs_fsync ((int (*) __P((struct  vop_fsync_args *)))nullop)
+#define kernfs_seek ((int (*) __P((struct  vop_seek_args *)))nullop)
+#define kernfs_remove ((int (*) __P((struct  vop_remove_args *)))kernfs_enotsupp)
+#define kernfs_link ((int (*) __P((struct  vop_link_args *)))kernfs_enotsupp)
+#define kernfs_rename ((int (*) __P((struct  vop_rename_args *)))kernfs_enotsupp)
+#define kernfs_mkdir ((int (*) __P((struct  vop_mkdir_args *)))kernfs_enotsupp)
+#define kernfs_rmdir ((int (*) __P((struct  vop_rmdir_args *)))kernfs_enotsupp)
+#define kernfs_symlink ((int (*) __P((struct vop_symlink_args *)))kernfs_enotsupp)
+#define kernfs_readlink \
+	((int (*) __P((struct  vop_readlink_args *)))kernfs_enotsupp)
+#define kernfs_abortop ((int (*) __P((struct  vop_abortop_args *)))nullop)
+#define kernfs_lock ((int (*) __P((struct  vop_lock_args *)))nullop)
+#define kernfs_unlock ((int (*) __P((struct  vop_unlock_args *)))nullop)
+#define kernfs_bmap ((int (*) __P((struct  vop_bmap_args *)))kernfs_badop)
+#define kernfs_strategy ((int (*) __P((struct  vop_strategy_args *)))kernfs_badop)
+#define kernfs_islocked ((int (*) __P((struct  vop_islocked_args *)))nullop)
+#define kernfs_advlock ((int (*) __P((struct vop_advlock_args *)))kernfs_enotsupp)
+#define kernfs_blkatoff \
+	((int (*) __P((struct  vop_blkatoff_args *)))kernfs_enotsupp)
+#define kernfs_valloc ((int(*) __P(( \
+		struct vnode *pvp, \
+		int mode, \
+		struct ucred *cred, \
+		struct vnode **vpp))) kernfs_enotsupp)
+#define kernfs_truncate \
+	((int (*) __P((struct  vop_truncate_args *)))kernfs_enotsupp)
+#define kernfs_update ((int (*) __P((struct  vop_update_args *)))kernfs_enotsupp)
+#define kernfs_bwrite ((int (*) __P((struct  vop_bwrite_args *)))kernfs_enotsupp)
+
+int (**kernfs_vnodeop_p)();
+struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = {
+	{ &vop_default_desc, vn_default_error },
+	{ &vop_lookup_desc, kernfs_lookup },	/* lookup */
+	{ &vop_create_desc, kernfs_create },	/* create */
+	{ &vop_mknod_desc, kernfs_mknod },	/* mknod */
+	{ &vop_open_desc, kernfs_open },	/* open */
+	{ &vop_close_desc, kernfs_close },	/* close */
+	{ &vop_access_desc, kernfs_access },	/* access */
+	{ &vop_getattr_desc, kernfs_getattr },	/* getattr */
+	{ &vop_setattr_desc, kernfs_setattr },	/* setattr */
+	{ &vop_read_desc, kernfs_read },	/* read */
+	{ &vop_write_desc, kernfs_write },	/* write */
+	{ &vop_ioctl_desc, kernfs_ioctl },	/* ioctl */
+	{ &vop_select_desc, kernfs_select },	/* select */
+	{ &vop_mmap_desc, kernfs_mmap },	/* mmap */
+	{ &vop_fsync_desc, kernfs_fsync },	/* fsync */
+	{ &vop_seek_desc, kernfs_seek },	/* seek */
+	{ &vop_remove_desc, kernfs_remove },	/* remove */
+	{ &vop_link_desc, kernfs_link },	/* link */
+	{ &vop_rename_desc, kernfs_rename },	/* rename */
+	{ &vop_mkdir_desc, kernfs_mkdir },	/* mkdir */
+	{ &vop_rmdir_desc, kernfs_rmdir },	/* rmdir */
+	{ &vop_symlink_desc, kernfs_symlink },	/* symlink */
+	{ &vop_readdir_desc, kernfs_readdir },	/* readdir */
+	{ &vop_readlink_desc, kernfs_readlink },/* readlink */
+	{ &vop_abortop_desc, kernfs_abortop },	/* abortop */
+	{ &vop_inactive_desc, kernfs_inactive },/* inactive */
+	{ &vop_reclaim_desc, kernfs_reclaim },	/* reclaim */
+	{ &vop_lock_desc, kernfs_lock },	/* lock */
+	{ &vop_unlock_desc, kernfs_unlock },	/* unlock */
+	{ &vop_bmap_desc, kernfs_bmap },	/* bmap */
+	{ &vop_strategy_desc, kernfs_strategy },/* strategy */
+	{ &vop_print_desc, kernfs_print },	/* print */
+	{ &vop_islocked_desc, kernfs_islocked },/* islocked */
+	{ &vop_pathconf_desc, kernfs_pathconf },/* pathconf */
+	{ &vop_advlock_desc, kernfs_advlock },	/* advlock */
+	{ &vop_blkatoff_desc, kernfs_blkatoff },/* blkatoff */
+	{ &vop_valloc_desc, kernfs_valloc },	/* valloc */
+	{ &vop_vfree_desc, kernfs_vfree },	/* vfree */
+	{ &vop_truncate_desc, kernfs_truncate },/* truncate */
+	{ &vop_update_desc, kernfs_update },	/* update */
+	{ &vop_bwrite_desc, kernfs_bwrite },	/* bwrite */
+	{ (struct vnodeop_desc*)NULL, (int(*)())NULL }
+};
+struct vnodeopv_desc kernfs_vnodeop_opv_desc =
+	{ &kernfs_vnodeop_p, kernfs_vnodeop_entries };