[apple/xnu.git] / bsd / miscfs / portal / portal_vnops.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * 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.
 *
 *      @(#)portal_vnops.c      8.14 (Berkeley) 5/21/95
 *
 *      @(#)portal_vnops.c      8.8 (Berkeley) 1/21/94
 */

/*
 * Portal Filesystem
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/namei.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/ubc.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#include <miscfs/portal/portal.h>
#include <vfs/vfs_support.h>

static int portal_fileid = PORTAL_ROOTFILEID+1;

static void
portal_closefd(p, fd)
        struct proc *p;
        int fd;
{
        int error;
        struct {
                int fd;
        } ua;
        int rc;

        ua.fd = fd;
        error = close(p, &ua, &rc);
        /*
         * We should never get an error, and there isn't anything
         * we could do if we got one, so just print a message.
         */
        if (error)
                printf("portal_closefd: error = %d\n", error);
}

/*
 * vp is the current namei directory
 * cnp is the name to locate in that directory...
 */
int
portal_lookup(ap)
        struct vop_lookup_args /* {
                struct vnode * a_dvp;
                struct vnode ** a_vpp;
                struct componentname * a_cnp;
        } */ *ap;
{
        struct componentname *cnp = ap->a_cnp;
        struct vnode **vpp = ap->a_vpp;
        struct vnode *dvp = ap->a_dvp;
        char *pname = cnp->cn_nameptr;
        struct portalnode *pt;
        int error;
        struct vnode *fvp = 0;
        char *path;
        int size;

        *vpp = NULLVP;

        if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)
                return (EROFS);

        if (cnp->cn_namelen == 1 && *pname == '.') {
                *vpp = dvp;
                VREF(dvp);
                /*VOP_LOCK(dvp);*/
                return (0);
        }

        MALLOC(pt, void *, sizeof(struct portalnode), M_TEMP, M_WAITOK);
        error = getnewvnode(VT_PORTAL, dvp->v_mount, portal_vnodeop_p, &fvp);
        if (error) {
                FREE(pt, M_TEMP);
                goto bad;
        }
        fvp->v_type = VREG;
        ubc_info_init(fvp);
        fvp->v_data = pt;

        /*
         * Save all of the remaining pathname and
         * advance the namei next pointer to the end
         * of the string.
         */
        for (size = 0, path = pname; *path; path++)
                size++;
        cnp->cn_consume = size - cnp->cn_namelen;

        MALLOC(pt->pt_arg, caddr_t, size+1, M_TEMP, M_WAITOK);
        pt->pt_size = size+1;
        bcopy(pname, pt->pt_arg, pt->pt_size);
        pt->pt_fileid = portal_fileid++;

        *vpp = fvp;
        /*VOP_LOCK(fvp);*/
        return (0);

bad:
        if (fvp)
                vrele(fvp);
        return (error);
}

/* This should be called only from network funnel */
static int
portal_connect(so, so2)
        struct socket *so;
        struct socket *so2;
{
        /* from unp_connect, bypassing the namei stuff... */
        struct socket *so3;
        struct unpcb *unp2;
        struct unpcb *unp3;

        if (so2 == 0)
                return (ECONNREFUSED);

        if (so->so_type != so2->so_type)
                return (EPROTOTYPE);

        if ((so2->so_options & SO_ACCEPTCONN) == 0)
                return (ECONNREFUSED);

        if ((so3 = sonewconn(so2, 0)) == 0)
                return (ECONNREFUSED);

        unp2 = sotounpcb(so2);
        unp3 = sotounpcb(so3);
        if (unp2->unp_addr)
                unp3->unp_addr = m_copy(unp2->unp_addr, 0, (int)M_COPYALL);

        so2 = so3;


        return (unp_connect2(so, so2));
}

int
portal_open(ap)
        struct vop_open_args /* {
                struct vnode *a_vp;
                int  a_mode;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;
{
        struct socket *so = 0;
        struct portalnode *pt;
        struct proc *p = ap->a_p;
        struct vnode *vp = ap->a_vp;
        int s;
        struct uio auio;
        struct iovec aiov[2];
        int res;
        struct mbuf *cm = 0;
        struct cmsghdr *cmsg;
        int newfds;
        int *ip;
        int fd;
        int error;
        int len;
        struct portalmount *fmp;
        struct file *fp;
        struct portal_cred pcred;

        /*
         * Nothing to do when opening the root node.
         */
        if (vp->v_flag & VROOT)
                return (0);

        /*
         * Can't be opened unless the caller is set up
         * to deal with the side effects.  Check for this
         * by testing whether the p_dupfd has been set.
         */
        if (p->p_dupfd >= 0)
                return (ENODEV);

        pt = VTOPORTAL(vp);
        fmp = VFSTOPORTAL(vp->v_mount);

        /*
         * Create a new socket.
         */
        thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
        error = socreate(AF_UNIX, &so, SOCK_STREAM, 0);
        if (error) {
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
        }

        /*
         * Reserve some buffer space
         */
        res = pt->pt_size + sizeof(pcred) + 512;        /* XXX */
        error = soreserve(so, res, res);
        if (error) {
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
        }

        /*
         * Kick off connection
         */
        error = portal_connect(so, (struct socket *)fmp->pm_server->f_data);
        if (error) {
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
        }

        /*
         * Wait for connection to complete
         */
        /*
         * XXX: Since the mount point is holding a reference on the
         * underlying server socket, it is not easy to find out whether
         * the server process is still running.  To handle this problem
         * we loop waiting for the new socket to be connected (something
         * which will only happen if the server is still running) or for
         * the reference count on the server socket to drop to 1, which
         * will happen if the server dies.  Sleep for 5 second intervals
         * and keep polling the reference count.   XXX.
         */
        s = splnet();
        while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
                if (fcount(fmp->pm_server) == 1) {
                        error = ECONNREFUSED;
                        splx(s);
                        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                        goto bad;
                }
                (void) tsleep((caddr_t) &so->so_timeo, PSOCK, "portalcon", 5 * hz);
        }
        splx(s);

        if (so->so_error) {
                error = so->so_error;
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
        }
                
        /*
         * Set miscellaneous flags
         */
        so->so_rcv.sb_timeo = 0;
        so->so_snd.sb_timeo = 0;
        so->so_rcv.sb_flags |= SB_NOINTR;
        so->so_snd.sb_flags |= SB_NOINTR;


        pcred.pcr_flag = ap->a_mode;
        pcred.pcr_uid = ap->a_cred->cr_uid;
        pcred.pcr_ngroups = ap->a_cred->cr_ngroups;
        bcopy(ap->a_cred->cr_groups, pcred.pcr_groups, NGROUPS * sizeof(gid_t));
        aiov[0].iov_base = (caddr_t) &pcred;
        aiov[0].iov_len = sizeof(pcred);
        aiov[1].iov_base = pt->pt_arg;
        aiov[1].iov_len = pt->pt_size;
        auio.uio_iov = aiov;
        auio.uio_iovcnt = 2;
        auio.uio_rw = UIO_WRITE;
        auio.uio_segflg = UIO_SYSSPACE;
        auio.uio_procp = p;
        auio.uio_offset = 0;
        auio.uio_resid = aiov[0].iov_len + aiov[1].iov_len;

        error = sosend(so, (struct sockaddr *) 0, &auio,
                        (struct mbuf *) 0, (struct mbuf *) 0, 0);
        if (error) {
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
        }

        len = auio.uio_resid = sizeof(int);
        do {
                struct mbuf *m = 0;
                int flags = MSG_WAITALL;
                error = soreceive(so, (struct sockaddr **) 0, &auio,
                                        &m, &cm, &flags);
                if (error) {
                        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                        goto bad;
                }

                /*
                 * Grab an error code from the mbuf.
                 */
                if (m) {
                        m = m_pullup(m, sizeof(int));   /* Needed? */
                        if (m) {
                                error = *(mtod(m, int *));
                                m_freem(m);
                        } else {
                                error = EINVAL;
                        }
                } else {
                        if (cm == 0) {
                                error = ECONNRESET;      /* XXX */
#ifdef notdef
                                break;
#endif
                        }
                }
        } while (cm == 0 && auio.uio_resid == len && !error);

        if (cm == 0) {
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
        }

        if (auio.uio_resid) {
                error = 0;
#ifdef notdef
                error = EMSGSIZE;
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
#endif
        }

        /*
         * XXX: Break apart the control message, and retrieve the
         * received file descriptor.  Note that more than one descriptor
         * may have been received, or that the rights chain may have more
         * than a single mbuf in it.  What to do?
         */
        cmsg = mtod(cm, struct cmsghdr *);
        newfds = (cmsg->cmsg_len - sizeof(*cmsg)) / sizeof (int);
        if (newfds == 0) {
                error = ECONNREFUSED;
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                goto bad;
        }
        /*
         * At this point the rights message consists of a control message
         * header, followed by a data region containing a vector of
         * integer file descriptors.  The fds were allocated by the action
         * of receiving the control message.
         */
        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
        ip = (int *) (cmsg + 1);
        fd = *ip++;
        if (newfds > 1) {
                /*
                 * Close extra fds.
                 */
                int i;
                printf("portal_open: %d extra fds\n", newfds - 1);
                for (i = 1; i < newfds; i++) {
                        portal_closefd(p, *ip);
                        ip++;
                }
        }

        /*
         * Check that the mode the file is being opened for is a subset 
         * of the mode of the existing descriptor.
         */
        fp = *fdfile(p, fd);
        if (((ap->a_mode & (FREAD|FWRITE)) | fp->f_flag) != fp->f_flag) {
                portal_closefd(p, fd);
                error = EACCES;
                goto bad;
        }

        /*
         * Save the dup fd in the proc structure then return the
         * special error code (ENXIO) which causes magic things to
         * happen in vn_open.  The whole concept is, well, hmmm.
         */
        p->p_dupfd = fd;
        error = ENXIO;

bad:;
        /*
         * And discard the control message.
         */
        if (cm) { 
                m_freem(cm);
        }

        if (so) {
                thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
                soshutdown(so, 2);
                soclose(so);
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
        }
        return (error);
}

int
portal_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;
        struct timeval tv;

        bzero(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_size = DEV_BSIZE;
        vap->va_blocksize = DEV_BSIZE;
        microtime(&tv);
        TIMEVAL_TO_TIMESPEC(&tv, &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;
        /* vap->va_qsize = 0; */
        if (vp->v_flag & VROOT) {
                vap->va_type = VDIR;
                vap->va_mode = S_IRUSR|S_IWUSR|S_IXUSR|
                                S_IRGRP|S_IWGRP|S_IXGRP|
                                S_IROTH|S_IWOTH|S_IXOTH;
                vap->va_nlink = 2;
                vap->va_fileid = 2;
        } else {
                vap->va_type = VREG;
                vap->va_mode = S_IRUSR|S_IWUSR|
                                S_IRGRP|S_IWGRP|
                                S_IROTH|S_IWOTH;
                vap->va_nlink = 1;
                vap->va_fileid = VTOPORTAL(vp)->pt_fileid;
        }
        return (0);
}

int
portal_setattr(ap)
        struct vop_setattr_args /* {
                struct vnode *a_vp;
                struct vattr *a_vap;
                struct ucred *a_cred;
                struct proc *a_p;
        } */ *ap;
{

        /*
         * Can't mess with the root vnode
         */
        if (ap->a_vp->v_flag & VROOT)
                return (EACCES);

        return (0);
}

/*
 * Fake readdir, just return empty directory.
 * It is hard to deal with '.' and '..' so don't bother.
 */
int
portal_readdir(ap)
        struct vop_readdir_args /* {
                struct vnode *a_vp;
                struct uio *a_uio;
                struct ucred *a_cred;
                int *a_eofflag;
                u_long *a_cookies;
                int a_ncookies;
        } */ *ap;
{

        /*
         * We don't allow exporting portal mounts, and currently local
         * requests do not need cookies.
         */
        if (ap->a_ncookies)
                panic("portal_readdir: not hungry");

        return (0);
}

int
portal_inactive(ap)
        struct vop_inactive_args /* {
                struct vnode *a_vp;
                struct proc *a_p;
        } */ *ap;
{

        VOP_UNLOCK(ap->a_vp, 0, ap->a_p);
        return (0);
}

int
portal_reclaim(ap)
        struct vop_reclaim_args /* {
                struct vnode *a_vp;
        } */ *ap;
{
        struct portalnode *pt = VTOPORTAL(ap->a_vp);

        if (pt->pt_arg) {
                _FREE((caddr_t) pt->pt_arg, M_TEMP);
                pt->pt_arg = 0;
        }
        FREE(ap->a_vp->v_data, M_TEMP);
        ap->a_vp->v_data = 0;

        return (0);
}

/*
 * Return POSIX pathconf information applicable to special devices.
 */
portal_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 Portal vnode.
 */
/* ARGSUSED */
int
portal_print(ap)
        struct vop_print_args /* {
                struct vnode *a_vp;
        } */ *ap;
{

        printf("tag VT_PORTAL, portal vnode\n");
        return (0);
}

/*void*/
int
portal_vfree(ap)
        struct vop_vfree_args /* {
                struct vnode *a_pvp;
                ino_t a_ino;
                int a_mode;
        } */ *ap;
{

        return (0);
}


/*
 * Portal vnode unsupported operation
 */
int
portal_enotsupp()
{

        return (EOPNOTSUPP);
}

/*
 * Portal "should never get here" operation
 */
int
portal_badop()
{

        panic("portal: bad op");
        /* NOTREACHED */
}

/*
 * Portal vnode null operation
 */
int
portal_nullop()
{

        return (0);
}

#define portal_create ((int (*) __P((struct vop_create_args *)))portal_enotsupp)
#define portal_mknod ((int (*) __P((struct  vop_mknod_args *)))portal_enotsupp)
#define portal_close ((int (*) __P((struct  vop_close_args *)))nullop)
#define portal_access ((int (*) __P((struct  vop_access_args *)))nullop)
#define portal_read ((int (*) __P((struct  vop_read_args *)))portal_enotsupp)
#define portal_write ((int (*) __P((struct  vop_write_args *)))portal_enotsupp)
#define portal_ioctl ((int (*) __P((struct  vop_ioctl_args *)))portal_enotsupp)
#define portal_select ((int (*) __P((struct vop_select_args *)))portal_enotsupp)
#define portal_mmap ((int (*) __P((struct  vop_mmap_args *)))portal_enotsupp)
#define portal_revoke vop_revoke
#define portal_fsync ((int (*) __P((struct  vop_fsync_args *)))nullop)
#define portal_seek ((int (*) __P((struct  vop_seek_args *)))nullop)
#define portal_remove ((int (*) __P((struct vop_remove_args *)))portal_enotsupp)
#define portal_link ((int (*) __P((struct  vop_link_args *)))portal_enotsupp)
#define portal_rename ((int (*) __P((struct vop_rename_args *)))portal_enotsupp)
#define portal_mkdir ((int (*) __P((struct  vop_mkdir_args *)))portal_enotsupp)
#define portal_rmdir ((int (*) __P((struct  vop_rmdir_args *)))portal_enotsupp)
#define portal_symlink \
        ((int (*) __P((struct  vop_symlink_args *)))portal_enotsupp)
#define portal_readlink \
        ((int (*) __P((struct  vop_readlink_args *)))portal_enotsupp)
#define portal_abortop ((int (*) __P((struct  vop_abortop_args *)))nullop)
#define portal_lock ((int (*) __P((struct  vop_lock_args *)))vop_nolock)
#define portal_unlock ((int (*) __P((struct  vop_unlock_args *)))vop_nounlock)
#define portal_bmap ((int (*) __P((struct  vop_bmap_args *)))portal_badop)
#define portal_strategy \
        ((int (*) __P((struct  vop_strategy_args *)))portal_badop)
#define portal_islocked \
        ((int (*) __P((struct vop_islocked_args *)))vop_noislocked)
#define fifo_islocked ((int(*) __P((struct vop_islocked_args *)))vop_noislocked)
#define portal_advlock \
        ((int (*) __P((struct  vop_advlock_args *)))portal_enotsupp)
#define portal_blkatoff \
        ((int (*) __P((struct  vop_blkatoff_args *)))portal_enotsupp)
#define portal_valloc ((int(*) __P(( \
                struct vnode *pvp, \
                int mode, \
                struct ucred *cred, \
                struct vnode **vpp))) portal_enotsupp)
#define portal_truncate \
        ((int (*) __P((struct  vop_truncate_args *)))portal_enotsupp)
#define portal_update ((int (*) __P((struct vop_update_args *)))portal_enotsupp)
#define portal_copyfile ((int (*) __P((struct vop_copyfile *)))err_copyfile)
#define portal_bwrite ((int (*) __P((struct vop_bwrite_args *)))portal_enotsupp)
#define portal_blktooff \
        ((int (*) __P((struct vop_blktooff_args *)))portal_enotsupp)
#define portal_offtoblk \
        ((int (*) __P((struct vop_offtoblk_args *)))portal_enotsupp)
#define portal_cmap \
        ((int (*) __P((struct vop_cmap_args *)))portal_enotsupp)

#define VOPFUNC int (*)(void *)

int (**portal_vnodeop_p)(void *);
struct vnodeopv_entry_desc portal_vnodeop_entries[] = {
        { &vop_default_desc, (VOPFUNC)vn_default_error },
        { &vop_lookup_desc, (VOPFUNC)portal_lookup },           /* lookup */
        { &vop_create_desc, (VOPFUNC)portal_create },           /* create */
        { &vop_mknod_desc, (VOPFUNC)portal_mknod },             /* mknod */
        { &vop_open_desc, (VOPFUNC)portal_open },               /* open */
        { &vop_close_desc, (VOPFUNC)portal_close },             /* close */
        { &vop_access_desc, (VOPFUNC)portal_access },           /* access */
        { &vop_getattr_desc, (VOPFUNC)portal_getattr },         /* getattr */
        { &vop_setattr_desc, (VOPFUNC)portal_setattr },         /* setattr */
        { &vop_read_desc, (VOPFUNC)portal_read },               /* read */
        { &vop_write_desc, (VOPFUNC)portal_write },             /* write */
        { &vop_ioctl_desc, (VOPFUNC)portal_ioctl },             /* ioctl */
        { &vop_select_desc, (VOPFUNC)portal_select },           /* select */
        { &vop_mmap_desc, (VOPFUNC)portal_mmap },               /* mmap */
        { &vop_revoke_desc, (VOPFUNC)portal_revoke },           /* revoke */
        { &vop_fsync_desc, (VOPFUNC)portal_fsync },             /* fsync */
        { &vop_seek_desc, (VOPFUNC)portal_seek },               /* seek */
        { &vop_remove_desc, (VOPFUNC)portal_remove },           /* remove */
        { &vop_link_desc, (VOPFUNC)portal_link },               /* link */
        { &vop_rename_desc, (VOPFUNC)portal_rename },           /* rename */
        { &vop_mkdir_desc, (VOPFUNC)portal_mkdir },             /* mkdir */
        { &vop_rmdir_desc, (VOPFUNC)portal_rmdir },             /* rmdir */
        { &vop_symlink_desc, (VOPFUNC)portal_symlink },         /* symlink */
        { &vop_readdir_desc, (VOPFUNC)portal_readdir },         /* readdir */
        { &vop_readlink_desc, (VOPFUNC)portal_readlink },       /* readlink */
        { &vop_abortop_desc, (VOPFUNC)portal_abortop },         /* abortop */
        { &vop_inactive_desc, (VOPFUNC)portal_inactive },       /* inactive */
        { &vop_reclaim_desc, (VOPFUNC)portal_reclaim },         /* reclaim */
        { &vop_lock_desc, (VOPFUNC)portal_lock },               /* lock */
        { &vop_unlock_desc, (VOPFUNC)portal_unlock },           /* unlock */
        { &vop_bmap_desc, (VOPFUNC)portal_bmap },               /* bmap */
        { &vop_strategy_desc, (VOPFUNC)portal_strategy },       /* strategy */
        { &vop_print_desc, (VOPFUNC)portal_print },             /* print */
        { &vop_islocked_desc, (VOPFUNC)portal_islocked },       /* islocked */
        { &vop_pathconf_desc, (VOPFUNC)portal_pathconf },       /* pathconf */
        { &vop_advlock_desc, (VOPFUNC)portal_advlock },         /* advlock */
        { &vop_blkatoff_desc, (VOPFUNC)portal_blkatoff },       /* blkatoff */
        { &vop_valloc_desc, (VOPFUNC)portal_valloc },           /* valloc */
        { &vop_vfree_desc, (VOPFUNC)portal_vfree },             /* vfree */
        { &vop_truncate_desc, (VOPFUNC)portal_truncate },       /* truncate */
        { &vop_update_desc, (VOPFUNC)portal_update },           /* update */
        { &vop_bwrite_desc, (VOPFUNC)portal_bwrite },           /* bwrite */
        { &vop_pagein_desc, (VOPFUNC)err_pagein },              /* Pagein */
        { &vop_pageout_desc, (VOPFUNC)err_pageout },            /* Pageout */
        { &vop_copyfile_desc, (VOPFUNC)portal_copyfile },       /* Copyfile */
        { &vop_blktooff_desc, (VOPFUNC)portal_blktooff },       /* blktooff */
        { &vop_blktooff_desc, (VOPFUNC)portal_offtoblk },       /* offtoblk */
        { &vop_cmap_desc, (VOPFUNC)portal_cmap },               /* cmap */
        { (struct vnodeop_desc*)NULL, (int(*)())NULL }
};
struct vnodeopv_desc portal_vnodeop_opv_desc =
        { &portal_vnodeop_p, portal_vnodeop_entries };