[apple/xnu.git] / bsd / nfs / nfs_syscalls.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) 1989, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * 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.
 *
 *      @(#)nfs_syscalls.c      8.5 (Berkeley) 3/30/95
 * FreeBSD-Id: nfs_syscalls.c,v 1.32 1997/11/07 08:53:25 phk Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
/* XXX CSM 11/25/97 FreeBSD's generated syscall prototypes */
#ifdef notyet
#include <sys/sysproto.h>
#endif
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/namei.h>
#include <sys/syslog.h>
#include <sys/user.h>
#include <machine/spl.h>

#include <netinet/in.h>
#include <netinet/tcp.h>
#if ISO
#include <netiso/iso.h>
#endif
#include <nfs/xdr_subs.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nfsrvcache.h>
#include <nfs/nfsmount.h>
#include <nfs/nfsnode.h>
#include <nfs/nqnfs.h>
#include <nfs/nfsrtt.h>


/* Global defs. */
extern int (*nfsrv3_procs[NFS_NPROCS]) __P((struct nfsrv_descript *nd,
                                            struct nfssvc_sock *slp,
                                            struct proc *procp,
                                            struct mbuf **mreqp));
extern int nfs_numasync;
extern time_t nqnfsstarttime;
extern int nqsrv_writeslack;
extern int nfsrtton;
extern struct nfsstats nfsstats;
extern int nfsrvw_procrastinate;
extern int nfsrvw_procrastinate_v3;
struct nfssvc_sock *nfs_udpsock, *nfs_cltpsock;
static int nuidhash_max = NFS_MAXUIDHASH;

static void     nfsrv_zapsock __P((struct nfssvc_sock *slp));
static int      nfssvc_iod __P((struct proc *));

#define TRUE    1
#define FALSE   0

static int nfs_asyncdaemon[NFS_MAXASYNCDAEMON];

#ifndef NFS_NOSERVER
int nfsd_waiting = 0;
static struct nfsdrt nfsdrt;
static int nfs_numnfsd = 0;
static int notstarted = 1;
static int modify_flag = 0;
static void     nfsd_rt __P((int sotype, struct nfsrv_descript *nd,
                             int cacherep));
static int      nfssvc_addsock __P((struct file *, struct mbuf *,
                                    struct proc *));
static int      nfssvc_nfsd __P((struct nfsd_srvargs *,caddr_t,struct proc *));

static int nfs_privport = 0;
/* XXX CSM 11/25/97 Upgrade sysctl.h someday */
#ifdef notyet
SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, 0, "");
SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, "");
SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, "");
#endif

/*
 * NFS server system calls
 * getfh() lives here too, but maybe should move to kern/vfs_syscalls.c
 */

/*
 * Get file handle system call
 */
#ifndef _SYS_SYSPROTO_H_
struct getfh_args {
        char    *fname;
        fhandle_t *fhp;
};
#endif
int
getfh(p, uap)
        struct proc *p;
        register struct getfh_args *uap;
{
        register struct vnode *vp;
        fhandle_t fh;
        int error;
        struct nameidata nd;

        /*
         * Must be super user
         */
        error = suser(p->p_ucred, &p->p_acflag);
        if(error)
                return (error);
        NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, uap->fname, p);
        error = namei(&nd);
        if (error)
                return (error);
        vp = nd.ni_vp;
        bzero((caddr_t)&fh, sizeof(fh));
        fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
        error = VFS_VPTOFH(vp, &fh.fh_fid);
        vput(vp);
        if (error)
                return (error);
        error = copyout((caddr_t)&fh, (caddr_t)uap->fhp, sizeof (fh));
        return (error);
}

#endif /* NFS_NOSERVER */
/*
 * Nfs server psuedo system call for the nfsd's
 * Based on the flag value it either:
 * - adds a socket to the selection list
 * - remains in the kernel as an nfsd
 * - remains in the kernel as an nfsiod
 */
#ifndef _SYS_SYSPROTO_H_
struct nfssvc_args {
        int flag;
        caddr_t argp;
};
#endif
int
nfssvc(p, uap)
        struct proc *p;
        register struct nfssvc_args *uap;
{
#ifndef NFS_NOSERVER
        struct nameidata nd;
        struct file *fp;
        struct mbuf *nam;
        struct nfsd_args nfsdarg;
        struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs;
        struct nfsd_cargs ncd;
        struct nfsd *nfsd;
        struct nfssvc_sock *slp;
        struct nfsuid *nuidp;
        struct nfsmount *nmp;
#endif /* NFS_NOSERVER */
        int error;

        /*
         * Must be super user
         */
        error = suser(p->p_ucred, &p->p_acflag);
        if(error)
                return (error);
        while (nfssvc_sockhead_flag & SLP_INIT) {
                 nfssvc_sockhead_flag |= SLP_WANTINIT;
                (void) tsleep((caddr_t)&nfssvc_sockhead, PSOCK, "nfsd init", 0);
        }
        if (uap->flag & NFSSVC_BIOD)
                error = nfssvc_iod(p);
#ifdef NFS_NOSERVER
        else
                error = ENXIO;
#else /* !NFS_NOSERVER */
        else if (uap->flag & NFSSVC_MNTD) {
                error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd));
                if (error)
                        return (error);
                NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
                        ncd.ncd_dirp, p);
                error = namei(&nd);
                if (error)
                        return (error);
                if ((nd.ni_vp->v_flag & VROOT) == 0)
                        error = EINVAL;
                nmp = VFSTONFS(nd.ni_vp->v_mount);
                vput(nd.ni_vp);
                if (error)
                        return (error);

                /* disable split funnels now */
                thread_funnel_merge(kernel_flock, network_flock);

                if ((nmp->nm_flag & NFSMNT_MNTD) &&
                        (uap->flag & NFSSVC_GOTAUTH) == 0)
                        return (0);
                nmp->nm_flag |= NFSMNT_MNTD;
                error = nqnfs_clientd(nmp, p->p_ucred, &ncd, uap->flag,
                        uap->argp, p);
        } else if (uap->flag & NFSSVC_ADDSOCK) {
                error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg));
                if (error)
                        return (error);
                error = getsock(p->p_fd, nfsdarg.sock, &fp);
                if (error)
                        return (error);
                /*
                 * Get the client address for connected sockets.
                 */
                if (nfsdarg.name == NULL || nfsdarg.namelen == 0)
                        nam = (struct mbuf *)0;
                else {
                        error = sockargs(&nam, nfsdarg.name, nfsdarg.namelen,
                                MT_SONAME);
                        if (error)
                                return (error);
                }
                error = nfssvc_addsock(fp, nam, p);
        } else {
                error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd));
                if (error)
                        return (error);

                /* disable split funnels now */
                thread_funnel_merge(kernel_flock, network_flock);

                if ((uap->flag & NFSSVC_AUTHIN) && ((nfsd = nsd->nsd_nfsd)) &&
                        (nfsd->nfsd_slp->ns_flag & SLP_VALID)) {
                        slp = nfsd->nfsd_slp;

                        /*
                         * First check to see if another nfsd has already
                         * added this credential.
                         */
                        for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first;
                            nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
                                if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid &&
                                    (!nfsd->nfsd_nd->nd_nam2 ||
                                     netaddr_match(NU_NETFAM(nuidp),
                                     &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2)))
                                        break;
                        }
                        if (nuidp) {
                            nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr);
                            nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
                        } else {
                            /*
                             * Nope, so we will.
                             */
                            if (slp->ns_numuids < nuidhash_max) {
                                slp->ns_numuids++;
                                nuidp = (struct nfsuid *)
                                   _MALLOC_ZONE(sizeof (struct nfsuid),
                                                        M_NFSUID, M_WAITOK);
                            } else
                                nuidp = (struct nfsuid *)0;
                            if ((slp->ns_flag & SLP_VALID) == 0) {
                                if (nuidp)
                                    _FREE_ZONE((caddr_t)nuidp,
                                        sizeof (struct nfsuid), M_NFSUID);
                            } else {
                                if (nuidp == (struct nfsuid *)0) {
                                    nuidp = slp->ns_uidlruhead.tqh_first;
                                    LIST_REMOVE(nuidp, nu_hash);
                                    TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp,
                                        nu_lru);
                                    if (nuidp->nu_flag & NU_NAM)
                                        m_freem(nuidp->nu_nam);
                                }
                                nuidp->nu_flag = 0;
                                nuidp->nu_cr = nsd->nsd_cr;
                                if (nuidp->nu_cr.cr_ngroups > NGROUPS)
                                    nuidp->nu_cr.cr_ngroups = NGROUPS;
                                nuidp->nu_cr.cr_ref = 1;
                                nuidp->nu_timestamp = nsd->nsd_timestamp;
                                nuidp->nu_expire = time.tv_sec + nsd->nsd_ttl;
                                /*
                                 * and save the session key in nu_key.
                                 */
                                bcopy(nsd->nsd_key, nuidp->nu_key,
                                    sizeof (nsd->nsd_key));
                                if (nfsd->nfsd_nd->nd_nam2) {
                                    struct sockaddr_in *saddr;

                                    saddr = mtod(nfsd->nfsd_nd->nd_nam2,
                                         struct sockaddr_in *);
                                    switch (saddr->sin_family) {
                                    case AF_INET:
                                        nuidp->nu_flag |= NU_INETADDR;
                                        nuidp->nu_inetaddr =
                                             saddr->sin_addr.s_addr;
                                        break;
                                    case AF_ISO:
                                    default:
                                        nuidp->nu_flag |= NU_NAM;
                                        nuidp->nu_nam = m_copym(
                                            nfsd->nfsd_nd->nd_nam2, 0,
                                             M_COPYALL, M_WAIT);
                                        break;
                                    };
                                }
                                TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp,
                                        nu_lru);
                                LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid),
                                        nuidp, nu_hash);
                                nfsrv_setcred(&nuidp->nu_cr,
                                    &nfsd->nfsd_nd->nd_cr);
                                nfsd->nfsd_nd->nd_flag |= ND_KERBFULL;
                            }
                        }
                }
                if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd))
                        nfsd->nfsd_flag |= NFSD_AUTHFAIL;
                error = nfssvc_nfsd(nsd, uap->argp, p);
        }
#endif /* NFS_NOSERVER */
        if (error == EINTR || error == ERESTART)
                error = 0;
        return (error);
}

#ifndef NFS_NOSERVER
/*
 * Adds a socket to the list for servicing by nfsds.
 */
static int
nfssvc_addsock(fp, mynam, p)
        struct file *fp;
        struct mbuf *mynam;
        struct proc *p;
{
        register struct mbuf *m;
        register int siz;
        register struct nfssvc_sock *slp;
        register struct socket *so;
        struct nfssvc_sock *tslp;
        int error, s;

        so = (struct socket *)fp->f_data;
        tslp = (struct nfssvc_sock *)0;
        /*
         * Add it to the list, as required.
         */
        thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
        if (so->so_proto->pr_protocol == IPPROTO_UDP) {
                tslp = nfs_udpsock;
                if (tslp->ns_flag & SLP_VALID) {
                        m_freem(mynam);
                        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                        return (EPERM);
                }
#if ISO
        } else if (so->so_proto->pr_protocol == ISOPROTO_CLTP) {
                tslp = nfs_cltpsock;
                if (tslp->ns_flag & SLP_VALID) {
                        m_freem(mynam);
                        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                        return (EPERM);
                }
#endif /* ISO */
        }
        if (so->so_type == SOCK_STREAM)
                siz = NFS_MAXPACKET + sizeof (u_long);
        else
                siz = NFS_MAXPACKET;
        error = soreserve(so, siz, siz);
        if (error) {
                m_freem(mynam);
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                return (error);
        }

        /*
         * Set protocol specific options { for now TCP only } and
         * reserve some space. For datagram sockets, this can get called
         * repeatedly for the same socket, but that isn't harmful.
         */
        if (so->so_type == SOCK_STREAM) {
                struct sockopt sopt;
                int val;

                bzero(&sopt, sizeof sopt);
                sopt.sopt_level = SOL_SOCKET;
                sopt.sopt_name = SO_KEEPALIVE;
                sopt.sopt_val = &val;
                sopt.sopt_valsize = sizeof val;
                val = 1;
                sosetopt(so, &sopt);
        }
        if (so->so_proto->pr_domain->dom_family == AF_INET &&
            so->so_proto->pr_protocol == IPPROTO_TCP) {
                struct sockopt sopt;
                int val;

                bzero(&sopt, sizeof sopt);
                sopt.sopt_level = IPPROTO_TCP;
                sopt.sopt_name = TCP_NODELAY;
                sopt.sopt_val = &val;
                sopt.sopt_valsize = sizeof val;
                val = 1;
                sosetopt(so, &sopt);
        }

        so->so_rcv.sb_flags &= ~SB_NOINTR;
        so->so_rcv.sb_timeo = 0;
        so->so_snd.sb_flags &= ~SB_NOINTR;
        so->so_snd.sb_timeo = 0;
        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
        if (tslp)
                slp = tslp;
        else {
                MALLOC(slp, struct nfssvc_sock *, sizeof(struct nfssvc_sock),
                                M_NFSSVC, M_WAITOK);
                bzero((caddr_t)slp, sizeof (struct nfssvc_sock));
                TAILQ_INIT(&slp->ns_uidlruhead);
                TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain);
        }
        slp->ns_so = so;
        slp->ns_nam = mynam;
        slp->ns_fp = fp;
        (void)fref(fp);
        thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
        s = splnet();
        so->so_upcallarg = (caddr_t)slp;
        so->so_upcall = nfsrv_rcv;
        so->so_rcv.sb_flags |= SB_UPCALL; /* required for freebsd merge */
        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
        slp->ns_flag = (SLP_VALID | SLP_NEEDQ);
        nfsrv_wakenfsd(slp);
        splx(s);
        return (0);
}

/*
 * Called by nfssvc() for nfsds. Just loops around servicing rpc requests
 * until it is killed by a signal.
 */
static int
nfssvc_nfsd(nsd, argp, p)
        struct nfsd_srvargs *nsd;
        caddr_t argp;
        struct proc *p;
{
        register struct mbuf *m;
        register int siz;
        register struct nfssvc_sock *slp;
        register struct socket *so;
        register int *solockp;
        struct nfsd *nfsd = nsd->nsd_nfsd;
        struct nfsrv_descript *nd = NULL;
        struct mbuf *mreq;
        int error = 0, cacherep, s, sotype, writes_todo;
        int procrastinate;
        u_quad_t cur_usec;
        extern void     nfs_aio_thread_init();

#ifndef nolint
        cacherep = RC_DOIT;
        writes_todo = 0;
#endif
        s = splnet();
        if (nfsd == (struct nfsd *)0) {
                MALLOC(nfsd, struct nfsd *, sizeof(struct nfsd), M_NFSD, M_WAITOK);
                nsd->nsd_nfsd = nfsd;
                bzero((caddr_t)nfsd, sizeof (struct nfsd));
                nfsd->nfsd_procp = p;
                TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain);
                nfs_numnfsd++;
                nfs_aio_thread_init();
        }
        /*
         * Loop getting rpc requests until SIGKILL.
         */
        for (;;) {
                if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) {
                        while (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
                            (nfsd_head_flag & NFSD_CHECKSLP) == 0) {
                                nfsd->nfsd_flag |= NFSD_WAITING;
                                nfsd_waiting++;
                                error = tsleep((caddr_t)nfsd, PSOCK | PCATCH,
                                    "nfsd", 0);
                                nfsd_waiting--;
                                if (error)
                                        goto done;
                        }
                        if (nfsd->nfsd_slp == (struct nfssvc_sock *)0 &&
                            (nfsd_head_flag & NFSD_CHECKSLP) != 0) {
                                for (slp = nfssvc_sockhead.tqh_first; slp != 0;
                                    slp = slp->ns_chain.tqe_next) {
                                    if ((slp->ns_flag & (SLP_VALID | SLP_DOREC))
                                        == (SLP_VALID | SLP_DOREC)) {
                                            slp->ns_flag &= ~SLP_DOREC;
                                            slp->ns_sref++;
                                            nfsd->nfsd_slp = slp;
                                            break;
                                    }
                                }
                                if (slp == 0)
                                        nfsd_head_flag &= ~NFSD_CHECKSLP;
                        }
                        if ((slp = nfsd->nfsd_slp) == (struct nfssvc_sock *)0)
                                continue;
                        if (slp->ns_flag & SLP_VALID) {
                                if (slp->ns_flag & SLP_DISCONN)
                                        nfsrv_zapsock(slp);
                                else if (slp->ns_flag & SLP_NEEDQ) {
                                        slp->ns_flag &= ~SLP_NEEDQ;
                                        (void) nfs_sndlock(&slp->ns_solock,
                                                (struct nfsreq *)0);
                                        thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
                                        nfsrv_rcv(slp->ns_so, (caddr_t)slp,
                                                M_WAIT);
                                        thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                                        nfs_sndunlock(&slp->ns_solock);
                                }
                                error = nfsrv_dorec(slp, nfsd, &nd);
                                cur_usec = (u_quad_t)time.tv_sec * 1000000 +
                                        (u_quad_t)time.tv_usec;
                                if (error && slp->ns_tq.lh_first &&
                                    slp->ns_tq.lh_first->nd_time <= cur_usec) {
                                        error = 0;
                                        cacherep = RC_DOIT;
                                        writes_todo = 1;
                                } else
                                        writes_todo = 0;
                                nfsd->nfsd_flag |= NFSD_REQINPROG;
                        }
                } else {
                        error = 0;
                        slp = nfsd->nfsd_slp;
                }
                if (error || (slp->ns_flag & SLP_VALID) == 0) {
                        if (nd) {
                                _FREE_ZONE((caddr_t)nd,
                                                sizeof *nd, M_NFSRVDESC);
                                nd = NULL;
                        }
                        nfsd->nfsd_slp = (struct nfssvc_sock *)0;
                        nfsd->nfsd_flag &= ~NFSD_REQINPROG;
                        nfsrv_slpderef(slp);
                        continue;
                }
                splx(s);
                so = slp->ns_so;
                sotype = so->so_type;
                if (so->so_proto->pr_flags & PR_CONNREQUIRED)
                        solockp = &slp->ns_solock;
                else
                        solockp = (int *)0;
                if (nd) {
                    nd->nd_starttime = time;
                    if (nd->nd_nam2)
                        nd->nd_nam = nd->nd_nam2;
                    else
                        nd->nd_nam = slp->ns_nam;

                    /*
                     * Check to see if authorization is needed.
                     */
                    if (nfsd->nfsd_flag & NFSD_NEEDAUTH) {
                        nfsd->nfsd_flag &= ~NFSD_NEEDAUTH;
                        nsd->nsd_haddr = mtod(nd->nd_nam,
                            struct sockaddr_in *)->sin_addr.s_addr;
                        nsd->nsd_authlen = nfsd->nfsd_authlen;
                        nsd->nsd_verflen = nfsd->nfsd_verflen;
                        if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr,
                                nfsd->nfsd_authlen) &&
                            !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr,
                                nfsd->nfsd_verflen) &&
                            !copyout((caddr_t)nsd, argp, sizeof (*nsd)))
                            return (ENEEDAUTH);
                        cacherep = RC_DROPIT;
                    } else
                        cacherep = nfsrv_getcache(nd, slp, &mreq);

                    /*
                     * Check for just starting up for NQNFS and send
                     * fake "try again later" replies to the NQNFS clients.
                     */
                    if (notstarted && nqnfsstarttime <= time.tv_sec) {
                        if (modify_flag) {
                                nqnfsstarttime = time.tv_sec + nqsrv_writeslack;
                                modify_flag = 0;
                        } else
                                notstarted = 0;
                    }
                    if (notstarted) {
                        if ((nd->nd_flag & ND_NQNFS) == 0)
                                cacherep = RC_DROPIT;
                        else if (nd->nd_procnum != NFSPROC_WRITE) {
                                nd->nd_procnum = NFSPROC_NOOP;
                                nd->nd_repstat = NQNFS_TRYLATER;
                                cacherep = RC_DOIT;
                        } else
                                modify_flag = 1;
                    } else if (nfsd->nfsd_flag & NFSD_AUTHFAIL) {
                        nfsd->nfsd_flag &= ~NFSD_AUTHFAIL;
                        nd->nd_procnum = NFSPROC_NOOP;
                        nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
                        cacherep = RC_DOIT;
                    } else if (nfs_privport) {
                        /* Check if source port is privileged */
                        u_short port;
                        struct sockaddr *nam = nd->nd_nam;
                        struct sockaddr_in *sin;

                        sin = (struct sockaddr_in *)nam;
                        port = ntohs(sin->sin_port);
                        if (port >= IPPORT_RESERVED && 
                            nd->nd_procnum != NFSPROC_NULL) {
                            nd->nd_procnum = NFSPROC_NOOP;
                            nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
                            cacherep = RC_DOIT;
                            printf("NFS request from unprivileged port (%s:%d)\n",
                                   (char *)(inet_ntoa(sin->sin_addr)), port);
                        }
                    }

                }

                /*
                 * Loop to get all the write rpc relies that have been
                 * gathered together.
                 */
                do {
                    switch (cacherep) {
                    case RC_DOIT:
                        if (nd && (nd->nd_flag & ND_NFSV3))
                            procrastinate = nfsrvw_procrastinate_v3;
                        else
                            procrastinate = nfsrvw_procrastinate;
                        if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE &&
                            procrastinate > 0 && !notstarted))
                            error = nfsrv_writegather(&nd, slp,
                                nfsd->nfsd_procp, &mreq);
                        else
                            error = (*(nfsrv3_procs[nd->nd_procnum]))(nd,
                                slp, nfsd->nfsd_procp, &mreq);
                        if (mreq == NULL)
                                break;
                        if (error) {
                                if (nd->nd_procnum != NQNFSPROC_VACATED)
                                        nfsstats.srv_errs++;
                                nfsrv_updatecache(nd, FALSE, mreq);
                                if (nd->nd_nam2)
                                        m_freem(nd->nd_nam2);
                                break;
                        }
                        nfsstats.srvrpccnt[nd->nd_procnum]++;
                        nfsrv_updatecache(nd, TRUE, mreq);
                        nd->nd_mrep = (struct mbuf *)0;
                    case RC_REPLY:
                        m = mreq;
                        siz = 0;
                        while (m) {
                                siz += m->m_len;
                                m = m->m_next;
                        }
                        if (siz <= 0 || siz > NFS_MAXPACKET) {
                                printf("mbuf siz=%d\n",siz);
                                panic("Bad nfs svc reply");
                        }
                        m = mreq;
                        m->m_pkthdr.len = siz;
                        m->m_pkthdr.rcvif = (struct ifnet *)0;
                        /*
                         * For stream protocols, prepend a Sun RPC
                         * Record Mark.
                         */
                        if (sotype == SOCK_STREAM) {
                                M_PREPEND(m, NFSX_UNSIGNED, M_WAIT);
                                *mtod(m, u_long *) = htonl(0x80000000 | siz);
                        }
                        if (solockp)
                                (void) nfs_sndlock(solockp, (struct nfsreq *)0);
                        if (slp->ns_flag & SLP_VALID)
                            error = nfs_send(so, nd->nd_nam2, m, NULL);
                        else {
                            error = EPIPE;
                            m_freem(m);
                        }
                        if (nfsrtton)
                                nfsd_rt(sotype, nd, cacherep);
                        if (nd->nd_nam2)
                                MFREE(nd->nd_nam2, m);
                        if (nd->nd_mrep)
                                m_freem(nd->nd_mrep);
                        if (error == EPIPE)
                                nfsrv_zapsock(slp);
                        if (solockp)
                                nfs_sndunlock(solockp);
                        if (error == EINTR || error == ERESTART) {
                                _FREE_ZONE((caddr_t)nd,
                                                sizeof *nd, M_NFSRVDESC);
                                nfsrv_slpderef(slp);
                                s = splnet();
                                goto done;
                        }
                        break;
                    case RC_DROPIT:
                        if (nfsrtton)
                                nfsd_rt(sotype, nd, cacherep);
                        m_freem(nd->nd_mrep);
                        m_freem(nd->nd_nam2);
                        break;
                    };
                    if (nd) {
                        FREE_ZONE((caddr_t)nd, sizeof *nd, M_NFSRVDESC);
                        nd = NULL;
                    }

                    /*
                     * Check to see if there are outstanding writes that
                     * need to be serviced.
                     */
                    cur_usec = (u_quad_t)time.tv_sec * 1000000 +
                        (u_quad_t)time.tv_usec;
                    s = splsoftclock();
                    if (slp->ns_tq.lh_first &&
                        slp->ns_tq.lh_first->nd_time <= cur_usec) {
                        cacherep = RC_DOIT;
                        writes_todo = 1;
                    } else
                        writes_todo = 0;
                    splx(s);
                } while (writes_todo);
                s = splnet();
                if (nfsrv_dorec(slp, nfsd, &nd)) {
                        nfsd->nfsd_flag &= ~NFSD_REQINPROG;
                        nfsd->nfsd_slp = NULL;
                        nfsrv_slpderef(slp);
                }
        }
done:
        TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain);
        splx(s);
        _FREE((caddr_t)nfsd, M_NFSD);
        nsd->nsd_nfsd = (struct nfsd *)0;
        if (--nfs_numnfsd == 0)
                nfsrv_init(TRUE);       /* Reinitialize everything */
        return (error);
}
#endif /* NFS_NOSERVER */

int nfs_defect = 0;
/* XXX CSM 11/25/97 Upgrade sysctl.h someday */
#ifdef notyet
SYSCTL_INT(_vfs_nfs, OID_AUTO, defect, CTLFLAG_RW, &nfs_defect, 0, "");
#endif

static int nfssvc_iod_continue(int);

/*
 * Asynchronous I/O daemons for client nfs.
 * They do read-ahead and write-behind operations on the block I/O cache.
 * Never returns unless it fails or gets killed.
 */
static int
nfssvc_iod(p)
        struct proc *p;
{
        register struct buf *bp;
        register int i, myiod;
        struct nfsmount *nmp;
        int error = 0;
        struct uthread *ut;

        /*
         * Assign my position or return error if too many already running
         */
        myiod = -1;
        for (i = 0; i < NFS_MAXASYNCDAEMON; i++)
                if (nfs_asyncdaemon[i] == 0) {
                        nfs_asyncdaemon[i]++;
                        myiod = i;
                        break;
                }
        if (myiod == -1)
                return (EBUSY);
        nfs_numasync++;

        /* stuff myiod into uthread to get off local stack for
       continuation */

        ut = get_bsdthread_info(current_act());
        ut->uu_state.uu_nfs_myiod = myiod;  /* squirrel away for continuation */

        nfssvc_iod_continue(0);
        /* NOTREACHED */

}

/*
 * Continuation for Asynchronous I/O daemons for client nfs.
 */
static int
nfssvc_iod_continue(error)
{
        register struct buf *bp;
        register int i, myiod;
        struct nfsmount *nmp;
        struct uthread *ut;
        struct proc *p;

        /*
         * real myiod is stored in uthread, recover it
         */
        ut = get_bsdthread_info(current_act());
        myiod = ut->uu_state.uu_nfs_myiod;
        p = get_bsdtask_info(current_task());

        /*
         * Just loop around doin our stuff until SIGKILL
     *  - actually we don't loop with continuations...
         */
        for (;;) {
            while (((nmp = nfs_iodmount[myiod]) == NULL
                    || nmp->nm_bufq.tqh_first == NULL)
                   && error == 0) {
                if (nmp)
                    nmp->nm_bufqiods--;
                nfs_iodwant[myiod] = p;
                nfs_iodmount[myiod] = NULL;
                error = tsleep0((caddr_t)&nfs_iodwant[myiod],
                        PWAIT | PCATCH, "nfsidl", 0, nfssvc_iod_continue);
                /* NOTREACHED */
            }
            if (error) {
                nfs_asyncdaemon[myiod] = 0;
                if (nmp) nmp->nm_bufqiods--;
                nfs_iodwant[myiod] = NULL;
                nfs_iodmount[myiod] = NULL;
                nfs_numasync--;
                if (error == EINTR || error == ERESTART)
                  error = 0;
#if defined (__i386__)
                return(error);
#else
                unix_syscall_return(error);
#endif
            }
            while ((bp = nmp->nm_bufq.tqh_first) != NULL) {
                /* Take one off the front of the list */
                TAILQ_REMOVE(&nmp->nm_bufq, bp, b_freelist);
                nmp->nm_bufqlen--;
                if (nmp->nm_bufqwant && nmp->nm_bufqlen < 2 * nfs_numasync) {
                    nmp->nm_bufqwant = FALSE;
                    wakeup(&nmp->nm_bufq);
                }
                if (ISSET(bp->b_flags, B_READ))
                    (void) nfs_doio(bp, bp->b_rcred, (struct proc *)0);
                else
                    (void) nfs_doio(bp, bp->b_wcred, (struct proc *)0);

                /*
                 * If there are more than one iod on this mount, then defect
                 * so that the iods can be shared out fairly between the mounts
                 */
                if (nfs_defect && nmp->nm_bufqiods > 1) {
                    NFS_DPF(ASYNCIO,
                            ("nfssvc_iod: iod %d defecting from mount %p\n",
                             myiod, nmp));
                    nfs_iodmount[myiod] = NULL;
                    nmp->nm_bufqiods--;
                    break;
                }
            }
        }
}

/*
 * Shut down a socket associated with an nfssvc_sock structure.
 * Should be called with the send lock set, if required.
 * The trick here is to increment the sref at the start, so that the nfsds
 * will stop using it and clear ns_flag at the end so that it will not be
 * reassigned during cleanup.
 */
static void
nfsrv_zapsock(slp)
        register struct nfssvc_sock *slp;
{
        register struct nfsuid *nuidp, *nnuidp;
        register struct nfsrv_descript *nwp, *nnwp;
        struct socket *so;
        struct file *fp;
        struct mbuf *m;
        int s;

        slp->ns_flag &= ~SLP_ALLFLAGS;
        fp = slp->ns_fp;
        if (fp) {
                slp->ns_fp = (struct file *)0;
                so = slp->ns_so;
                thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
                so->so_upcall = NULL;
                so->so_rcv.sb_flags &= ~SB_UPCALL;
                soshutdown(so, 2);
                thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
                closef(fp, (struct proc *)0);
                if (slp->ns_nam)
                        MFREE(slp->ns_nam, m);
                m_freem(slp->ns_raw);
                m_freem(slp->ns_rec);
                for (nuidp = slp->ns_uidlruhead.tqh_first; nuidp != 0;
                    nuidp = nnuidp) {
                        nnuidp = nuidp->nu_lru.tqe_next;
                        LIST_REMOVE(nuidp, nu_hash);
                        TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru);
                        if (nuidp->nu_flag & NU_NAM)
                                m_freem(nuidp->nu_nam);
                        _FREE_ZONE((caddr_t)nuidp,
                                        sizeof (struct nfsuid), M_NFSUID);
                }
                s = splsoftclock();
                for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) {
                        nnwp = nwp->nd_tq.le_next;
                        LIST_REMOVE(nwp, nd_tq);
                        _FREE_ZONE((caddr_t)nwp, sizeof *nwp, M_NFSRVDESC);
                }
                LIST_INIT(&slp->ns_tq);
                splx(s);
        }
}

/*
 * Get an authorization string for the uid by having the mount_nfs sitting
 * on this mount point porpous out of the kernel and do it.
 */
int
nfs_getauth(nmp, rep, cred, auth_str, auth_len, verf_str, verf_len, key)
        register struct nfsmount *nmp;
        struct nfsreq *rep;
        struct ucred *cred;
        char **auth_str;
        int *auth_len;
        char *verf_str;
        int *verf_len;
        NFSKERBKEY_T key;               /* return session key */
{
        int error = 0;

        while ((nmp->nm_flag & NFSMNT_WAITAUTH) == 0) {
                nmp->nm_flag |= NFSMNT_WANTAUTH;
                (void) tsleep((caddr_t)&nmp->nm_authtype, PSOCK,
                        "nfsauth1", 2 * hz);
                error = nfs_sigintr(nmp, rep, rep->r_procp);
                if (error) {
                        nmp->nm_flag &= ~NFSMNT_WANTAUTH;
                        return (error);
                }
        }
        nmp->nm_flag &= ~(NFSMNT_WAITAUTH | NFSMNT_WANTAUTH);
        MALLOC(*auth_str, char *, RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK);
        nmp->nm_authstr = *auth_str;
        nmp->nm_authlen = RPCAUTH_MAXSIZ;
        nmp->nm_verfstr = verf_str;
        nmp->nm_verflen = *verf_len;
        nmp->nm_authuid = cred->cr_uid;
        wakeup((caddr_t)&nmp->nm_authstr);

        /*
         * And wait for mount_nfs to do its stuff.
         */
        while ((nmp->nm_flag & NFSMNT_HASAUTH) == 0 && error == 0) {
                (void) tsleep((caddr_t)&nmp->nm_authlen, PSOCK,
                        "nfsauth2", 2 * hz);
                error = nfs_sigintr(nmp, rep, rep->r_procp);
        }
        if (nmp->nm_flag & NFSMNT_AUTHERR) {
                nmp->nm_flag &= ~NFSMNT_AUTHERR;
                error = EAUTH;
        }
        if (error)
                _FREE((caddr_t)*auth_str, M_TEMP);
        else {
                *auth_len = nmp->nm_authlen;
                *verf_len = nmp->nm_verflen;
                bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key));
        }
        nmp->nm_flag &= ~NFSMNT_HASAUTH;
        nmp->nm_flag |= NFSMNT_WAITAUTH;
        if (nmp->nm_flag & NFSMNT_WANTAUTH) {
                nmp->nm_flag &= ~NFSMNT_WANTAUTH;
                wakeup((caddr_t)&nmp->nm_authtype);
        }
        return (error);
}

/*
 * Get a nickname authenticator and verifier.
 */
int
nfs_getnickauth(nmp, cred, auth_str, auth_len, verf_str, verf_len)
        struct nfsmount *nmp;
        struct ucred *cred;
        char **auth_str;
        int *auth_len;
        char *verf_str;
        int verf_len;
{
        register struct nfsuid *nuidp;
        register u_long *nickp, *verfp;
        struct timeval ktvin, ktvout;

#if DIAGNOSTIC
        if (verf_len < (4 * NFSX_UNSIGNED))
                panic("nfs_getnickauth verf too small");
#endif
        for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first;
            nuidp != 0; nuidp = nuidp->nu_hash.le_next) {
                if (nuidp->nu_cr.cr_uid == cred->cr_uid)
                        break;
        }
        if (!nuidp || nuidp->nu_expire < time.tv_sec)
                return (EACCES);

        /*
         * Move to the end of the lru list (end of lru == most recently used).
         */
        TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
        TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru);

        MALLOC(nickp, u_long *, 2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK);
        *nickp++ = txdr_unsigned(RPCAKN_NICKNAME);
        *nickp = txdr_unsigned(nuidp->nu_nickname);
        *auth_str = (char *)nickp;
        *auth_len = 2 * NFSX_UNSIGNED;

        /*
         * Now we must encrypt the verifier and package it up.
         */
        verfp = (u_long *)verf_str;
        *verfp++ = txdr_unsigned(RPCAKN_NICKNAME);
        if (time.tv_sec > nuidp->nu_timestamp.tv_sec ||
            (time.tv_sec == nuidp->nu_timestamp.tv_sec &&
             time.tv_usec > nuidp->nu_timestamp.tv_usec))
                nuidp->nu_timestamp = time;
        else
                nuidp->nu_timestamp.tv_usec++;
        ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec);
        ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec);

        /*
         * Now encrypt the timestamp verifier in ecb mode using the session
         * key.
         */
#if NFSKERB
        XXX
#endif

        *verfp++ = ktvout.tv_sec;
        *verfp++ = ktvout.tv_usec;
        *verfp = 0;
        return (0);
}

/*
 * Save the current nickname in a hash list entry on the mount point.
 */
int
nfs_savenickauth(nmp, cred, len, key, mdp, dposp, mrep)
        register struct nfsmount *nmp;
        struct ucred *cred;
        int len;
        NFSKERBKEY_T key;
        struct mbuf **mdp;
        char **dposp;
        struct mbuf *mrep;
{
        register struct nfsuid *nuidp;
        register u_long *tl;
        register long t1;
        struct mbuf *md = *mdp;
        struct timeval ktvin, ktvout;
        u_long nick;
        char *dpos = *dposp, *cp2;
        int deltasec, error = 0;

        if (len == (3 * NFSX_UNSIGNED)) {
                nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
                ktvin.tv_sec = *tl++;
                ktvin.tv_usec = *tl++;
                nick = fxdr_unsigned(u_long, *tl);

                /*
                 * Decrypt the timestamp in ecb mode.
                 */
#if NFSKERB
                XXX
#endif
                ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec);
                ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec);
                deltasec = time.tv_sec - ktvout.tv_sec;
                if (deltasec < 0)
                        deltasec = -deltasec;
                /*
                 * If ok, add it to the hash list for the mount point.
                 */
                if (deltasec <= NFS_KERBCLOCKSKEW) {
                        if (nmp->nm_numuids < nuidhash_max) {
                                nmp->nm_numuids++;
                                MALLOC_ZONE(nuidp, struct nfsuid *,
                                                sizeof (struct nfsuid),
                                                        M_NFSUID, M_WAITOK);
                        } else {
                                nuidp = nmp->nm_uidlruhead.tqh_first;
                                LIST_REMOVE(nuidp, nu_hash);
                                TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp,
                                        nu_lru);
                        }
                        nuidp->nu_flag = 0;
                        nuidp->nu_cr.cr_uid = cred->cr_uid;
                        nuidp->nu_expire = time.tv_sec + NFS_KERBTTL;
                        nuidp->nu_timestamp = ktvout;
                        nuidp->nu_nickname = nick;
                        bcopy(key, nuidp->nu_key, sizeof (key));
                        TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp,
                                nu_lru);
                        LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid),
                                nuidp, nu_hash);
                }
        } else
                nfsm_adv(nfsm_rndup(len));
nfsmout:
        *mdp = md;
        *dposp = dpos;
        return (error);
}

#ifndef NFS_NOSERVER

/*
 * Derefence a server socket structure. If it has no more references and
 * is no longer valid, you can throw it away.
 */
void
nfsrv_slpderef(slp)
        register struct nfssvc_sock *slp;
{
        if (--(slp->ns_sref) == 0 && (slp->ns_flag & SLP_VALID) == 0) {
                TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
                _FREE((caddr_t)slp, M_NFSSVC);
        }
}

/*
 * Initialize the data structures for the server.
 * Handshake with any new nfsds starting up to avoid any chance of
 * corruption.
 */
void
nfsrv_init(terminating)
        int terminating;
{
        register struct nfssvc_sock *slp, *nslp;

        if (nfssvc_sockhead_flag & SLP_INIT)
                panic("nfsd init");
        nfssvc_sockhead_flag |= SLP_INIT;
        if (terminating) {
                for (slp = nfssvc_sockhead.tqh_first; slp != 0; slp = nslp) {
                        nslp = slp->ns_chain.tqe_next;
                        if (slp->ns_flag & SLP_VALID)
                                nfsrv_zapsock(slp);
                        TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain);
                        _FREE((caddr_t)slp, M_NFSSVC);
                }
                nfsrv_cleancache();     /* And clear out server cache */
/* XXX CSM 12/4/97 Revisit when enabling WebNFS */
#ifdef notyet
        } else
                nfs_pub.np_valid = 0;
#else
        }
#endif

        TAILQ_INIT(&nfssvc_sockhead);
        nfssvc_sockhead_flag &= ~SLP_INIT;
        if (nfssvc_sockhead_flag & SLP_WANTINIT) {
                nfssvc_sockhead_flag &= ~SLP_WANTINIT;
                wakeup((caddr_t)&nfssvc_sockhead);
        }

        TAILQ_INIT(&nfsd_head);
        nfsd_head_flag &= ~NFSD_CHECKSLP;

        MALLOC(nfs_udpsock, struct nfssvc_sock *, sizeof(struct nfssvc_sock),
                        M_NFSSVC, M_WAITOK);
        bzero((caddr_t)nfs_udpsock, sizeof (struct nfssvc_sock));
        TAILQ_INIT(&nfs_udpsock->ns_uidlruhead);
        TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain);

        MALLOC(nfs_cltpsock, struct nfssvc_sock *, sizeof(struct nfssvc_sock),
                        M_NFSSVC, M_WAITOK);
        bzero((caddr_t)nfs_cltpsock, sizeof (struct nfssvc_sock));
        TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead);
        TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain);
}

/*
 * Add entries to the server monitor log.
 */
static void
nfsd_rt(sotype, nd, cacherep)
        int sotype;
        register struct nfsrv_descript *nd;
        int cacherep;
{
        register struct drt *rt;

        rt = &nfsdrt.drt[nfsdrt.pos];
        if (cacherep == RC_DOIT)
                rt->flag = 0;
        else if (cacherep == RC_REPLY)
                rt->flag = DRT_CACHEREPLY;
        else
                rt->flag = DRT_CACHEDROP;
        if (sotype == SOCK_STREAM)
                rt->flag |= DRT_TCP;
        if (nd->nd_flag & ND_NQNFS)
                rt->flag |= DRT_NQNFS;
        else if (nd->nd_flag & ND_NFSV3)
                rt->flag |= DRT_NFSV3;
        rt->proc = nd->nd_procnum;
        if (mtod(nd->nd_nam, struct sockaddr *)->sa_family == AF_INET)
            rt->ipadr = mtod(nd->nd_nam, struct sockaddr_in *)->sin_addr.s_addr;
        else
            rt->ipadr = INADDR_ANY;
        rt->resptime = ((time.tv_sec - nd->nd_starttime.tv_sec) * 1000000) +
                (time.tv_usec - nd->nd_starttime.tv_usec);
        rt->tstamp = time;
        nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ;
}
#endif /* NFS_NOSERVER */