/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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. 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.
 *
 */

#include <sys/cdefs.h>
#include "opt_inet.h"
#include "opt_inet6.h"
/*
 * nfs version 2, 3 and 4 server calls to vnode ops
 * - these routines generally have 3 phases
 *   1 - break down and validate rpc request in mbuf list
 *   2 - do the vnode ops for the request, usually by calling a nfsvno_XXX()
 *       function in nfsd_port.c
 *   3 - build the rpc reply in an mbuf list
 * For nfsv4, these functions are called for each Op within the Compound RPC.
 */

#include <fs/nfs/nfsport.h>
#include <sys/extattr.h>
#include <sys/filio.h>

/* Global vars */
extern u_int32_t newnfs_false, newnfs_true;
extern __enum_uint8(vtype) nv34tov_type[8];
extern struct timeval nfsboottime;
extern int nfsrv_enable_crossmntpt;
extern int nfsrv_statehashsize;
extern int nfsrv_layouthashsize;
extern time_t nfsdev_time;
extern volatile int nfsrv_devidcnt;
extern int nfsd_debuglevel;
extern u_long sb_max_adj;
extern int nfsrv_pnfsatime;
extern int nfsrv_maxpnfsmirror;
extern uint32_t nfs_srvmaxio;

static int	nfs_async = 0;
SYSCTL_DECL(_vfs_nfsd);
SYSCTL_INT(_vfs_nfsd, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0,
    "Tell client that writes were synced even though they were not");
extern int	nfsrv_doflexfile;
SYSCTL_INT(_vfs_nfsd, OID_AUTO, default_flexfile, CTLFLAG_RW,
    &nfsrv_doflexfile, 0, "Make Flex File Layout the default for pNFS");
static int	nfsrv_linux42server = 1;
SYSCTL_INT(_vfs_nfsd, OID_AUTO, linux42server, CTLFLAG_RW,
    &nfsrv_linux42server, 0,
    "Enable Linux style NFSv4.2 server (non-RFC compliant)");
static bool	nfsrv_openaccess = true;
SYSCTL_BOOL(_vfs_nfsd, OID_AUTO, v4openaccess, CTLFLAG_RW,
    &nfsrv_openaccess, 0,
    "Enable Linux style NFSv4 Open access check");
static char nfsrv_scope[NFSV4_OPAQUELIMIT];
SYSCTL_STRING(_vfs_nfsd, OID_AUTO, scope, CTLFLAG_RWTUN,
    &nfsrv_scope, NFSV4_OPAQUELIMIT, "Server scope");
static char nfsrv_owner_major[NFSV4_OPAQUELIMIT];
SYSCTL_STRING(_vfs_nfsd, OID_AUTO, owner_major, CTLFLAG_RWTUN,
    &nfsrv_owner_major, NFSV4_OPAQUELIMIT, "Server owner major");
static uint64_t nfsrv_owner_minor;
SYSCTL_U64(_vfs_nfsd, OID_AUTO, owner_minor, CTLFLAG_RWTUN,
    &nfsrv_owner_minor, 0, "Server owner minor");
/*
 * Only enable this if all your exported file systems
 * (or pNFS DSs for the pNFS case) support VOP_ALLOCATE.
 */
static bool	nfsrv_doallocate = false;
SYSCTL_BOOL(_vfs_nfsd, OID_AUTO, enable_v42allocate, CTLFLAG_RW,
    &nfsrv_doallocate, 0,
    "Enable NFSv4.2 Allocate operation");

/*
 * This list defines the GSS mechanisms supported.
 * (Don't ask me how you get these strings from the RFC stuff like
 *  iso(1), org(3)... but someone did it, so I don't need to know.)
 */
static struct nfsgss_mechlist nfsgss_mechlist[] = {
	{ 9, "\052\206\110\206\367\022\001\002\002", 11 },
	{ 0, "", 0 },
};

/* local functions */
static void nfsrvd_symlinksub(struct nfsrv_descript *nd, struct nameidata *ndp,
    struct nfsvattr *nvap, fhandle_t *fhp, vnode_t *vpp,
    vnode_t dirp, struct nfsvattr *dirforp, struct nfsvattr *diraftp,
    int *diraft_retp, nfsattrbit_t *attrbitp,
    NFSACL_T *aclp, NFSPROC_T *p, struct nfsexstuff *exp, char *pathcp,
    int pathlen);
static void nfsrvd_mkdirsub(struct nfsrv_descript *nd, struct nameidata *ndp,
    struct nfsvattr *nvap, fhandle_t *fhp, vnode_t *vpp,
    vnode_t dirp, struct nfsvattr *dirforp, struct nfsvattr *diraftp,
    int *diraft_retp, nfsattrbit_t *attrbitp, NFSACL_T *aclp,
    NFSPROC_T *p, struct nfsexstuff *exp);

/*
 * nfs access service (not a part of NFS V2)
 */
int
nfsrvd_access(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int getret, error = 0;
	struct nfsvattr nva;
	u_int32_t testmode, nfsmode, supported = 0;
	accmode_t deletebit;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, 1, &nva);
		goto out;
	}
	NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
	nfsmode = fxdr_unsigned(u_int32_t, *tl);
	if ((nd->nd_flag & ND_NFSV4) &&
	    (nfsmode & ~(NFSACCESS_READ | NFSACCESS_LOOKUP |
	     NFSACCESS_MODIFY | NFSACCESS_EXTEND | NFSACCESS_DELETE |
	     NFSACCESS_EXECUTE | NFSACCESS_XAREAD | NFSACCESS_XAWRITE |
	     NFSACCESS_XALIST))) {
		nd->nd_repstat = NFSERR_INVAL;
		vput(vp);
		goto out;
	}
	if (nfsmode & NFSACCESS_READ) {
		supported |= NFSACCESS_READ;
		if (nfsvno_accchk(vp, VREAD, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~NFSACCESS_READ;
	}
	if (nfsmode & NFSACCESS_MODIFY) {
		supported |= NFSACCESS_MODIFY;
		if (nfsvno_accchk(vp, VWRITE, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~NFSACCESS_MODIFY;
	}
	if (nfsmode & NFSACCESS_EXTEND) {
		supported |= NFSACCESS_EXTEND;
		if (nfsvno_accchk(vp, VWRITE | VAPPEND, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~NFSACCESS_EXTEND;
	}
	if (nfsmode & NFSACCESS_XAREAD) {
		supported |= NFSACCESS_XAREAD;
		if (nfsvno_accchk(vp, VREAD, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~NFSACCESS_XAREAD;
	}
	if (nfsmode & NFSACCESS_XAWRITE) {
		supported |= NFSACCESS_XAWRITE;
		if (nfsvno_accchk(vp, VWRITE, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~NFSACCESS_XAWRITE;
	}
	if (nfsmode & NFSACCESS_XALIST) {
		supported |= NFSACCESS_XALIST;
		if (nfsvno_accchk(vp, VREAD, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~NFSACCESS_XALIST;
	}
	if (nfsmode & NFSACCESS_DELETE) {
		supported |= NFSACCESS_DELETE;
		if (vp->v_type == VDIR)
			deletebit = VDELETE_CHILD;
		else
			deletebit = VDELETE;
		if (nfsvno_accchk(vp, deletebit, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~NFSACCESS_DELETE;
	}
	if (vp->v_type == VDIR)
		testmode = NFSACCESS_LOOKUP;
	else
		testmode = NFSACCESS_EXECUTE;
	if (nfsmode & testmode) {
		supported |= (nfsmode & testmode);
		if (nfsvno_accchk(vp, VEXEC, nd->nd_cred, exp, p,
		    NFSACCCHK_NOOVERRIDE, NFSACCCHK_VPISLOCKED, &supported))
			nfsmode &= ~testmode;
	}
	nfsmode &= supported;
	if (nd->nd_flag & ND_NFSV3) {
		getret = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
		nfsrv_postopattr(nd, getret, &nva);
	}
	vput(vp);
	if (nd->nd_flag & ND_NFSV4) {
		NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(supported);
	} else
		NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
	*tl = txdr_unsigned(nfsmode);

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs getattr service
 */
int
nfsrvd_getattr(struct nfsrv_descript *nd, int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	struct nfsvattr nva;
	fhandle_t fh;
	int at_root = 0, error = 0, supports_nfsv4acls;
	struct nfsreferral *refp;
	nfsattrbit_t attrbits, tmpbits;
	struct mount *mp;
	struct vnode *tvp = NULL;
	struct vattr va;
	uint64_t mounted_on_fileno = 0;
	accmode_t accmode;
	struct thread *p = curthread;

	if (nd->nd_repstat)
		goto out;
	if (nd->nd_flag & ND_NFSV4) {
		error = nfsrv_getattrbits(nd, &attrbits, NULL, NULL);
		if (error) {
			vput(vp);
			goto out;
		}

		/*
		 * Check for a referral.
		 */
		refp = nfsv4root_getreferral(vp, NULL, 0);
		if (refp != NULL) {
			(void) nfsrv_putreferralattr(nd, &attrbits, refp, 1,
			    &nd->nd_repstat);
			vput(vp);
			goto out;
		}
		if (nd->nd_repstat == 0) {
			accmode = 0;
			NFSSET_ATTRBIT(&tmpbits, &attrbits);

			/*
			 * GETATTR with write-only attr time_access_set and time_modify_set
			 * should return NFS4ERR_INVAL.
			 */
			if (NFSISSET_ATTRBIT(&tmpbits, NFSATTRBIT_TIMEACCESSSET) ||
					NFSISSET_ATTRBIT(&tmpbits, NFSATTRBIT_TIMEMODIFYSET)){
				error = NFSERR_INVAL;
				vput(vp);
				goto out;
			}
			if (NFSISSET_ATTRBIT(&tmpbits, NFSATTRBIT_ACL)) {
				NFSCLRBIT_ATTRBIT(&tmpbits, NFSATTRBIT_ACL);
				accmode |= VREAD_ACL;
			}
			if (NFSNONZERO_ATTRBIT(&tmpbits))
				accmode |= VREAD_ATTRIBUTES;
			if (accmode != 0)
				nd->nd_repstat = nfsvno_accchk(vp, accmode,
				    nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
				    NFSACCCHK_VPISLOCKED, NULL);
		}
	}
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1, &attrbits);
	if (!nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV4) {
			if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_FILEHANDLE))
				nd->nd_repstat = nfsvno_getfh(vp, &fh, p);
			if (!nd->nd_repstat)
				nd->nd_repstat = nfsrv_checkgetattr(nd, vp,
				    &nva, &attrbits, p);
			if (nd->nd_repstat == 0) {
				supports_nfsv4acls = nfs_supportsnfsv4acls(vp);
				mp = vp->v_mount;
				if (nfsrv_enable_crossmntpt != 0 &&
				    vp->v_type == VDIR &&
				    (vp->v_vflag & VV_ROOT) != 0 &&
				    vp != rootvnode) {
					tvp = mp->mnt_vnodecovered;
					VREF(tvp);
					at_root = 1;
				} else
					at_root = 0;
				vfs_ref(mp);
				NFSVOPUNLOCK(vp);
				if (at_root != 0) {
					if ((nd->nd_repstat =
					     NFSVOPLOCK(tvp, LK_SHARED)) == 0) {
						nd->nd_repstat = VOP_GETATTR(
						    tvp, &va, nd->nd_cred);
						vput(tvp);
					} else
						vrele(tvp);
					if (nd->nd_repstat == 0)
						mounted_on_fileno = (uint64_t)
						    va.va_fileid;
					else
						at_root = 0;
				}
				if (nd->nd_repstat == 0)
					nd->nd_repstat = vfs_busy(mp, 0);
				vfs_rel(mp);
				if (nd->nd_repstat == 0) {
					(void)nfsvno_fillattr(nd, mp, vp, &nva,
					    &fh, 0, &attrbits, nd->nd_cred, p,
					    isdgram, 1, supports_nfsv4acls,
					    at_root, mounted_on_fileno);
					vfs_unbusy(mp);
				}
				vrele(vp);
			} else
				vput(vp);
		} else {
			nfsrv_fillattr(nd, &nva);
			vput(vp);
		}
	} else {
		vput(vp);
	}

out:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs setattr service
 */
int
nfsrvd_setattr(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	struct nfsvattr nva, nva2;
	u_int32_t *tl;
	int preat_ret = 1, postat_ret = 1, gcheck = 0, error = 0;
	int gotproxystateid;
	struct timespec guard = { 0, 0 };
	nfsattrbit_t attrbits, retbits;
	nfsv4stateid_t stateid;
	NFSACL_T *aclp = NULL;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_wcc(nd, preat_ret, &nva2, postat_ret, &nva);
		goto out;
	}
#ifdef NFS4_ACL_EXTATTR_NAME
	aclp = acl_alloc(M_WAITOK);
	aclp->acl_cnt = 0;
#endif
	gotproxystateid = 0;
	NFSVNO_ATTRINIT(&nva);
	if (nd->nd_flag & ND_NFSV4) {
		NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
		stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
		stateid.other[0] = *tl++;
		stateid.other[1] = *tl++;
		stateid.other[2] = *tl;
		if (stateid.other[0] == 0x55555555 &&
		    stateid.other[1] == 0x55555555 &&
		    stateid.other[2] == 0x55555555 &&
		    stateid.seqid == 0xffffffff)
			gotproxystateid = 1;
	}
	error = nfsrv_sattr(nd, vp, &nva, &attrbits, aclp, p);
	if (error)
		goto nfsmout;

	/* For NFSv4, only va_uid is used from nva2. */
	NFSZERO_ATTRBIT(&retbits);
	NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_OWNER);
	preat_ret = nfsvno_getattr(vp, &nva2, nd, p, 1, &retbits);
	if (!nd->nd_repstat)
		nd->nd_repstat = preat_ret;

	NFSZERO_ATTRBIT(&retbits);
	if (nd->nd_flag & ND_NFSV3) {
		NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
		gcheck = fxdr_unsigned(int, *tl);
		if (gcheck) {
			NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
			fxdr_nfsv3time(tl, &guard);
		}
		if (!nd->nd_repstat && gcheck &&
		    (nva2.na_ctime.tv_sec != guard.tv_sec ||
		     nva2.na_ctime.tv_nsec != guard.tv_nsec))
			nd->nd_repstat = NFSERR_NOT_SYNC;
		if (nd->nd_repstat) {
			vput(vp);
#ifdef NFS4_ACL_EXTATTR_NAME
			acl_free(aclp);
#endif
			nfsrv_wcc(nd, preat_ret, &nva2, postat_ret, &nva);
			goto out;
		}
	} else if (!nd->nd_repstat && (nd->nd_flag & ND_NFSV4))
		nd->nd_repstat = nfsrv_checkuidgid(nd, &nva);

	/*
	 * Now that we have all the fields, lets do it.
	 * If the size is being changed write access is required, otherwise
	 * just check for a read only file system.
	 */
	if (!nd->nd_repstat) {
		if (NFSVNO_NOTSETSIZE(&nva)) {
			if (NFSVNO_EXRDONLY(exp) ||
			    (vp->v_mount->mnt_flag & MNT_RDONLY))
				nd->nd_repstat = EROFS;
		} else {
			if (vp->v_type != VREG)
				nd->nd_repstat = EINVAL;
			else if (nva2.na_uid != nd->nd_cred->cr_uid ||
			    NFSVNO_EXSTRICTACCESS(exp))
				nd->nd_repstat = nfsvno_accchk(vp,
				    VWRITE, nd->nd_cred, exp, p,
				    NFSACCCHK_NOOVERRIDE,
				    NFSACCCHK_VPISLOCKED, NULL);
		}
	}
	/*
	 * Proxy operations from the MDS are allowed via the all 0s special
	 * stateid.
	 */
	if (nd->nd_repstat == 0 && (nd->nd_flag & ND_NFSV4) != 0 &&
	    gotproxystateid == 0)
		nd->nd_repstat = nfsrv_checksetattr(vp, nd, &stateid,
		    &nva, &attrbits, exp, p);

	if (!nd->nd_repstat && (nd->nd_flag & ND_NFSV4)) {
	    /*
	     * For V4, try setting the attributes in sets, so that the
	     * reply bitmap will be correct for an error case.
	     */
	    if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_OWNER) ||
		NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP)) {
		NFSVNO_ATTRINIT(&nva2);
		NFSVNO_SETATTRVAL(&nva2, uid, nva.na_uid);
		NFSVNO_SETATTRVAL(&nva2, gid, nva.na_gid);
		nd->nd_repstat = nfsvno_setattr(vp, &nva2, nd->nd_cred, p,
		    exp);
		if (!nd->nd_repstat) {
		    if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_OWNER))
			NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_OWNER);
		    if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_OWNERGROUP))
			NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_OWNERGROUP);
		}
	    }
	    if (!nd->nd_repstat &&
		NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_SIZE)) {
		NFSVNO_ATTRINIT(&nva2);
		NFSVNO_SETATTRVAL(&nva2, size, nva.na_size);
		nd->nd_repstat = nfsvno_setattr(vp, &nva2, nd->nd_cred, p,
		    exp);
		if (!nd->nd_repstat)
		    NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_SIZE);
	    }
	    if (!nd->nd_repstat &&
		(NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET) ||
		 NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET))) {
		NFSVNO_ATTRINIT(&nva2);
		NFSVNO_SETATTRVAL(&nva2, atime, nva.na_atime);
		NFSVNO_SETATTRVAL(&nva2, mtime, nva.na_mtime);
		if (nva.na_vaflags & VA_UTIMES_NULL) {
			nva2.na_vaflags |= VA_UTIMES_NULL;
			NFSVNO_SETACTIVE(&nva2, vaflags);
		}
		nd->nd_repstat = nfsvno_setattr(vp, &nva2, nd->nd_cred, p,
		    exp);
		if (!nd->nd_repstat) {
		    if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_TIMEACCESSSET))
			NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_TIMEACCESSSET);
		    if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_TIMEMODIFYSET))
			NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_TIMEMODIFYSET);
		}
	    }
	    if (!nd->nd_repstat &&
		NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_TIMECREATE)) {
		NFSVNO_ATTRINIT(&nva2);
		NFSVNO_SETATTRVAL(&nva2, btime, nva.na_btime);
		nd->nd_repstat = nfsvno_setattr(vp, &nva2, nd->nd_cred, p,
		    exp);
		if (!nd->nd_repstat)
		    NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_TIMECREATE);
	    }
	    if (!nd->nd_repstat &&
		(NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_MODE) ||
		 NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_MODESETMASKED))) {
		NFSVNO_ATTRINIT(&nva2);
		NFSVNO_SETATTRVAL(&nva2, mode, nva.na_mode);
		nd->nd_repstat = nfsvno_setattr(vp, &nva2, nd->nd_cred, p,
		    exp);
		if (!nd->nd_repstat) {
		    if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_MODE))
			NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_MODE);
		    if (NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_MODESETMASKED))
			NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_MODESETMASKED);
		}
	    }

#ifdef NFS4_ACL_EXTATTR_NAME
	    if (!nd->nd_repstat && aclp->acl_cnt > 0 &&
		NFSISSET_ATTRBIT(&attrbits, NFSATTRBIT_ACL)) {
		nd->nd_repstat = nfsrv_setacl(vp, aclp, nd->nd_cred, p);
		if (!nd->nd_repstat) 
		    NFSSETBIT_ATTRBIT(&retbits, NFSATTRBIT_ACL);
	    }
#endif
	} else if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_setattr(vp, &nva, nd->nd_cred, p,
		    exp);
	}
	if (nd->nd_flag & (ND_NFSV2 | ND_NFSV3)) {
		postat_ret = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
		if (!nd->nd_repstat)
			nd->nd_repstat = postat_ret;
	}
	vput(vp);
#ifdef NFS4_ACL_EXTATTR_NAME
	acl_free(aclp);
#endif
	if (nd->nd_flag & ND_NFSV3)
		nfsrv_wcc(nd, preat_ret, &nva2, postat_ret, &nva);
	else if (nd->nd_flag & ND_NFSV4)
		(void) nfsrv_putattrbit(nd, &retbits);
	else if (!nd->nd_repstat)
		nfsrv_fillattr(nd, &nva);

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
#ifdef NFS4_ACL_EXTATTR_NAME
	acl_free(aclp);
#endif
	if (nd->nd_flag & ND_NFSV4) {
		/*
		 * For all nd_repstat, the V4 reply includes a bitmap,
		 * even NFSERR_BADXDR, which is what this will end up
		 * returning.
		 */
		(void) nfsrv_putattrbit(nd, &retbits);
	}
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs lookup rpc
 * (Also performs lookup parent for v4)
 */
int
nfsrvd_lookup(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, vnode_t *vpp, fhandle_t *fhp, struct nfsexstuff *exp)
{
	struct nameidata named;
	vnode_t vp, dirp = NULL;
	int error = 0, dattr_ret = 1;
	struct nfsvattr nva, dattr;
	char *bufp;
	u_long *hashp;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, dattr_ret, &dattr);
		goto out;
	}

	/*
	 * For some reason, if dp is a symlink, the error
	 * returned is supposed to be NFSERR_SYMLINK and not NFSERR_NOTDIR.
	 */
	if (dp->v_type == VLNK && (nd->nd_flag & ND_NFSV4)) {
		nd->nd_repstat = NFSERR_SYMLINK;
		vrele(dp);
		goto out;
	}

	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, LOOKUP,
	    LOCKLEAF);
	nfsvno_setpathbuf(&named, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
	if (error) {
		vrele(dp);
		nfsvno_relpathbuf(&named);
		goto out;
	}
	if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_namei(nd, &named, dp, 0, exp, &dirp);
	} else {
		vrele(dp);
		nfsvno_relpathbuf(&named);
	}
	if (nd->nd_repstat) {
		if (dirp) {
			if (nd->nd_flag & ND_NFSV3)
				dattr_ret = nfsvno_getattr(dirp, &dattr, nd, p,
				    0, NULL);
			vrele(dirp);
		}
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_postopattr(nd, dattr_ret, &dattr);
		goto out;
	}
	nfsvno_relpathbuf(&named);
	vp = named.ni_vp;
	if ((nd->nd_flag & ND_NFSV4) != 0 && !NFSVNO_EXPORTED(exp) &&
	    vp->v_type != VDIR && vp->v_type != VLNK)
		/*
		 * Only allow lookup of VDIR and VLNK for traversal of
		 * non-exported volumes during NFSv4 mounting.
		 */
		nd->nd_repstat = ENOENT;
	if (nd->nd_repstat == 0) {
		nd->nd_repstat = nfsvno_getfh(vp, fhp, p);
		/*
		 * EOPNOTSUPP indicates the file system cannot be exported,
		 * so just pretend the entry does not exist.
		 */
		if (nd->nd_repstat == EOPNOTSUPP)
			nd->nd_repstat = ENOENT;
	}
	if (!(nd->nd_flag & ND_NFSV4) && !nd->nd_repstat)
		nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
	if (vpp != NULL && nd->nd_repstat == 0)
		*vpp = vp;
	else
		vput(vp);
	if (dirp) {
		if (nd->nd_flag & ND_NFSV3)
			dattr_ret = nfsvno_getattr(dirp, &dattr, nd, p, 0,
			    NULL);
		vrele(dirp);
	}
	if (nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_postopattr(nd, dattr_ret, &dattr);
		goto out;
	}
	if (nd->nd_flag & ND_NFSV2) {
		(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, 0, 0);
		nfsrv_fillattr(nd, &nva);
	} else if (nd->nd_flag & ND_NFSV3) {
		(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, 0, 0);
		nfsrv_postopattr(nd, 0, &nva);
		nfsrv_postopattr(nd, dattr_ret, &dattr);
	}

out:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs readlink service
 */
int
nfsrvd_readlink(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	struct mbuf *mp = NULL, *mpend = NULL;
	int getret = 1, len;
	struct nfsvattr nva;
	struct thread *p = curthread;
	uint16_t off;

	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, getret, &nva);
		goto out;
	}
	if (vp->v_type != VLNK) {
		if (nd->nd_flag & ND_NFSV2)
			nd->nd_repstat = ENXIO;
		else
			nd->nd_repstat = EINVAL;
	}
	if (nd->nd_repstat == 0) {
		if ((nd->nd_flag & ND_EXTPG) != 0)
			nd->nd_repstat = nfsvno_readlink(vp, nd->nd_cred,
			    nd->nd_maxextsiz, p, &mp, &mpend, &len);
		else
			nd->nd_repstat = nfsvno_readlink(vp, nd->nd_cred,
			    0, p, &mp, &mpend, &len);
	}
	if (nd->nd_flag & ND_NFSV3)
		getret = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
	vput(vp);
	if (nd->nd_flag & ND_NFSV3)
		nfsrv_postopattr(nd, getret, &nva);
	if (nd->nd_repstat)
		goto out;
	NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
	*tl = txdr_unsigned(len);
	if (mp != NULL) {
		nd->nd_mb->m_next = mp;
		nd->nd_mb = mpend;
		if ((mpend->m_flags & M_EXTPG) != 0) {
			nd->nd_bextpg = mpend->m_epg_npgs - 1;
			nd->nd_bpos = (char *)(void *)
			    PHYS_TO_DMAP(mpend->m_epg_pa[nd->nd_bextpg]);
			off = (nd->nd_bextpg == 0) ? mpend->m_epg_1st_off : 0;
			nd->nd_bpos += off + mpend->m_epg_last_len;
			nd->nd_bextpgsiz = PAGE_SIZE - mpend->m_epg_last_len -
			    off;
		} else
			nd->nd_bpos = mtod(mpend, char *) + mpend->m_len;
	}

out:
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfs read service
 */
int
nfsrvd_read(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int error = 0, cnt, getret = 1, gotproxystateid, reqlen, eof = 0;
	struct mbuf *m2, *m3;
	struct nfsvattr nva;
	off_t off = 0x0;
	struct nfsstate st, *stp = &st;
	struct nfslock lo, *lop = &lo;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	struct thread *p = curthread;
	uint16_t poff;

	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, getret, &nva);
		goto out;
	}
	if (nd->nd_flag & ND_NFSV2) {
		NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
		off = (off_t)fxdr_unsigned(u_int32_t, *tl++);
		reqlen = fxdr_unsigned(int, *tl);
	} else if (nd->nd_flag & ND_NFSV3) {
		NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
		off = fxdr_hyper(tl);
		tl += 2;
		reqlen = fxdr_unsigned(int, *tl);
	} else {
		NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3*NFSX_UNSIGNED);
		reqlen = fxdr_unsigned(int, *(tl + 6));
	}
	if (reqlen > NFS_SRVMAXDATA(nd)) {
		reqlen = NFS_SRVMAXDATA(nd);
	} else if (reqlen < 0) {
		error = EBADRPC;
		goto nfsmout;
	}
	gotproxystateid = 0;
	if (nd->nd_flag & ND_NFSV4) {
		stp->ls_flags = (NFSLCK_CHECK | NFSLCK_READACCESS);
		lop->lo_flags = NFSLCK_READ;
		stp->ls_ownerlen = 0;
		stp->ls_op = NULL;
		stp->ls_uid = nd->nd_cred->cr_uid;
		stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
		clientid.lval[0] = stp->ls_stateid.other[0] = *tl++;
		clientid.lval[1] = stp->ls_stateid.other[1] = *tl++;
		if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				clientid.qval = nd->nd_clientid.qval;
			else if (nd->nd_clientid.qval != clientid.qval)
				printf("EEK1 multiple clids\n");
		} else {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				printf("EEK! no clientid from session\n");
			nd->nd_flag |= ND_IMPLIEDCLID;
			nd->nd_clientid.qval = clientid.qval;
		}
		stp->ls_stateid.other[2] = *tl++;
		/*
		 * Don't allow the client to use a special stateid for a DS op.
		 */
		if ((nd->nd_flag & ND_DSSERVER) != 0 &&
		    ((stp->ls_stateid.other[0] == 0x0 &&
		    stp->ls_stateid.other[1] == 0x0 &&
		    stp->ls_stateid.other[2] == 0x0) ||
		    (stp->ls_stateid.other[0] == 0xffffffff &&
		    stp->ls_stateid.other[1] == 0xffffffff &&
		    stp->ls_stateid.other[2] == 0xffffffff) ||
		    stp->ls_stateid.seqid != 0))
			nd->nd_repstat = NFSERR_BADSTATEID;
		/* However, allow the proxy stateid. */
		if (stp->ls_stateid.seqid == 0xffffffff &&
		    stp->ls_stateid.other[0] == 0x55555555 &&
		    stp->ls_stateid.other[1] == 0x55555555 &&
		    stp->ls_stateid.other[2] == 0x55555555)
			gotproxystateid = 1;
		off = fxdr_hyper(tl);
		lop->lo_first = off;
		tl += 2;
		lop->lo_end = off + reqlen;
		/*
		 * Paranoia, just in case it wraps around.
		 */
		if (lop->lo_end < off)
			lop->lo_end = NFS64BITSSET;
	}
	if (vp->v_type != VREG) {
		if (nd->nd_flag & ND_NFSV3)
			nd->nd_repstat = EINVAL;
		else
			nd->nd_repstat = (vp->v_type == VDIR) ? EISDIR :
			    EINVAL;
	}
	getret = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
	if (!nd->nd_repstat)
		nd->nd_repstat = getret;
	if (!nd->nd_repstat &&
	    (nva.na_uid != nd->nd_cred->cr_uid ||
	     NFSVNO_EXSTRICTACCESS(exp))) {
		nd->nd_repstat = nfsvno_accchk(vp, VREAD,
		    nd->nd_cred, exp, p,
		    NFSACCCHK_ALLOWOWNER, NFSACCCHK_VPISLOCKED, NULL);
		if (nd->nd_repstat)
			nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
			    nd->nd_cred, exp, p, NFSACCCHK_ALLOWOWNER,
			    NFSACCCHK_VPISLOCKED, NULL);
	}
	/*
	 * DS reads are marked by ND_DSSERVER or use the proxy special
	 * stateid.
	 */
	if (nd->nd_repstat == 0 && (nd->nd_flag & (ND_NFSV4 | ND_DSSERVER)) ==
	    ND_NFSV4 && gotproxystateid == 0)
		nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
		    &stateid, exp, nd, p);
	if (nd->nd_repstat) {
		vput(vp);
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_postopattr(nd, getret, &nva);
		goto out;
	}
	if (off >= nva.na_size) {
		cnt = 0;
		eof = 1;
	} else if (reqlen == 0)
		cnt = 0;
	else if ((off + reqlen) >= nva.na_size) {
		cnt = nva.na_size - off;
		eof = 1;
	} else
		cnt = reqlen;
	m3 = NULL;
	if (cnt > 0) {
		/*
		 * If cnt > MCLBYTES and the reply will not be saved, use
		 * ext_pgs mbufs for TLS.
		 * For NFSv4.0, we do not know for sure if the reply will
		 * be saved, so do not use ext_pgs mbufs for NFSv4.0.
		 * Always use ext_pgs mbufs if ND_EXTPG is set.
		 */
		if ((nd->nd_flag & ND_EXTPG) != 0 || (cnt > MCLBYTES &&
		    (nd->nd_flag & (ND_TLS | ND_SAVEREPLY)) == ND_TLS &&
		    (nd->nd_flag & (ND_NFSV4 | ND_NFSV41)) != ND_NFSV4))
			nd->nd_repstat = nfsvno_read(vp, off, cnt, nd->nd_cred,
			    nd->nd_maxextsiz, p, &m3, &m2);
		else
			nd->nd_repstat = nfsvno_read(vp, off, cnt, nd->nd_cred,
			    0, p, &m3, &m2);
		if (!(nd->nd_flag & ND_NFSV4)) {
			getret = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
			if (!nd->nd_repstat)
				nd->nd_repstat = getret;
		}
		if (nd->nd_repstat) {
			vput(vp);
			if (m3)
				m_freem(m3);
			if (nd->nd_flag & ND_NFSV3)
				nfsrv_postopattr(nd, getret, &nva);
			goto out;
		}
	}
	vput(vp);
	if (nd->nd_flag & ND_NFSV2) {
		nfsrv_fillattr(nd, &nva);
		NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
	} else {
		if (nd->nd_flag & ND_NFSV3) {
			nfsrv_postopattr(nd, getret, &nva);
			NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(cnt);
		} else
			NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
		if (eof)
			*tl++ = newnfs_true;
		else
			*tl++ = newnfs_false;
	}
	*tl = txdr_unsigned(cnt);
	if (m3) {
		nd->nd_mb->m_next = m3;
		nd->nd_mb = m2;
		if ((m2->m_flags & M_EXTPG) != 0) {
			nd->nd_flag |= ND_EXTPG;
			nd->nd_bextpg = m2->m_epg_npgs - 1;
			nd->nd_bpos = (char *)(void *)
			    PHYS_TO_DMAP(m2->m_epg_pa[nd->nd_bextpg]);
			poff = (nd->nd_bextpg == 0) ? m2->m_epg_1st_off : 0;
			nd->nd_bpos += poff + m2->m_epg_last_len;
			nd->nd_bextpgsiz = PAGE_SIZE - m2->m_epg_last_len -
			    poff;
		} else
			nd->nd_bpos = mtod(m2, char *) + m2->m_len;
	}

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs write service
 */
int
nfsrvd_write(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	struct nfsvattr nva, forat;
	int aftat_ret = 1, retlen, len, error = 0, forat_ret = 1;
	int gotproxystateid, stable = NFSWRITE_FILESYNC;
	off_t off;
	struct nfsstate st, *stp = &st;
	struct nfslock lo, *lop = &lo;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	nfsattrbit_t attrbits;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_wcc(nd, forat_ret, &forat, aftat_ret, &nva);
		goto out;
	}
	gotproxystateid = 0;
	if (nd->nd_flag & ND_NFSV2) {
		NFSM_DISSECT(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
		off = (off_t)fxdr_unsigned(u_int32_t, *++tl);
		tl += 2;
		retlen = len = fxdr_unsigned(int32_t, *tl);
	} else if (nd->nd_flag & ND_NFSV3) {
		NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
		off = fxdr_hyper(tl);
		tl += 3;
		stable = fxdr_unsigned(int, *tl++);
		retlen = len = fxdr_unsigned(int32_t, *tl);
	} else {
		NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 4 * NFSX_UNSIGNED);
		stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS);
		lop->lo_flags = NFSLCK_WRITE;
		stp->ls_ownerlen = 0;
		stp->ls_op = NULL;
		stp->ls_uid = nd->nd_cred->cr_uid;
		stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
		clientid.lval[0] = stp->ls_stateid.other[0] = *tl++;
		clientid.lval[1] = stp->ls_stateid.other[1] = *tl++;
		if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				clientid.qval = nd->nd_clientid.qval;
			else if (nd->nd_clientid.qval != clientid.qval)
				printf("EEK2 multiple clids\n");
		} else {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				printf("EEK! no clientid from session\n");
			nd->nd_flag |= ND_IMPLIEDCLID;
			nd->nd_clientid.qval = clientid.qval;
		}
		stp->ls_stateid.other[2] = *tl++;
		/*
		 * Don't allow the client to use a special stateid for a DS op.
		 */
		if ((nd->nd_flag & ND_DSSERVER) != 0 &&
		    ((stp->ls_stateid.other[0] == 0x0 &&
		    stp->ls_stateid.other[1] == 0x0 &&
		    stp->ls_stateid.other[2] == 0x0) ||
		    (stp->ls_stateid.other[0] == 0xffffffff &&
		    stp->ls_stateid.other[1] == 0xffffffff &&
		    stp->ls_stateid.other[2] == 0xffffffff) ||
		    stp->ls_stateid.seqid != 0))
			nd->nd_repstat = NFSERR_BADSTATEID;
		/* However, allow the proxy stateid. */
		if (stp->ls_stateid.seqid == 0xffffffff &&
		    stp->ls_stateid.other[0] == 0x55555555 &&
		    stp->ls_stateid.other[1] == 0x55555555 &&
		    stp->ls_stateid.other[2] == 0x55555555)
			gotproxystateid = 1;
		off = fxdr_hyper(tl);
		lop->lo_first = off;
		tl += 2;
		stable = fxdr_unsigned(int, *tl++);
		retlen = len = fxdr_unsigned(int32_t, *tl);
		lop->lo_end = off + len;
		/*
		 * Paranoia, just in case it wraps around, which shouldn't
		 * ever happen anyhow.
		 */
		if (lop->lo_end < lop->lo_first)
			lop->lo_end = NFS64BITSSET;
	}

	if (retlen > nfs_srvmaxio || retlen < 0)
		nd->nd_repstat = EIO;
	if (vp->v_type != VREG && !nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV3)
			nd->nd_repstat = EINVAL;
		else
			nd->nd_repstat = (vp->v_type == VDIR) ? EISDIR :
			    EINVAL;
	}
	NFSZERO_ATTRBIT(&attrbits);
	NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER);
	forat_ret = nfsvno_getattr(vp, &forat, nd, p, 1, &attrbits);
	if (!nd->nd_repstat)
		nd->nd_repstat = forat_ret;
	if (!nd->nd_repstat &&
	    (forat.na_uid != nd->nd_cred->cr_uid ||
	     NFSVNO_EXSTRICTACCESS(exp)))
		nd->nd_repstat = nfsvno_accchk(vp, VWRITE,
		    nd->nd_cred, exp, p,
		    NFSACCCHK_ALLOWOWNER, NFSACCCHK_VPISLOCKED, NULL);
	/*
	 * DS reads are marked by ND_DSSERVER or use the proxy special
	 * stateid.
	 */
	if (nd->nd_repstat == 0 && (nd->nd_flag & (ND_NFSV4 | ND_DSSERVER)) ==
	    ND_NFSV4 && gotproxystateid == 0)
		nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
		    &stateid, exp, nd, p);
	if (nd->nd_repstat) {
		vput(vp);
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_wcc(nd, forat_ret, &forat, aftat_ret, &nva);
		goto out;
	}

	/*
	 * For NFS Version 2, it is not obvious what a write of zero length
	 * should do, but I might as well be consistent with Version 3,
	 * which is to return ok so long as there are no permission problems.
	 */
	if (retlen > 0) {
		nd->nd_repstat = nfsvno_write(vp, off, retlen, &stable,
		    nd->nd_md, nd->nd_dpos, nd->nd_cred, p);
		error = nfsm_advance(nd, NFSM_RNDUP(retlen), -1);
		if (error)
			goto nfsmout;
	}
	if (nd->nd_flag & ND_NFSV4)
		aftat_ret = 0;
	else
		aftat_ret = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
	vput(vp);
	if (!nd->nd_repstat)
		nd->nd_repstat = aftat_ret;
	if (nd->nd_flag & (ND_NFSV3 | ND_NFSV4)) {
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_wcc(nd, forat_ret, &forat, aftat_ret, &nva);
		if (nd->nd_repstat)
			goto out;
		NFSM_BUILD(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(retlen);
		/*
		 * If nfs_async is set, then pretend the write was FILESYNC.
		 * Warning: Doing this violates RFC1813 and runs a risk
		 * of data written by a client being lost when the server
		 * crashes/reboots.
		 */
		if (stable == NFSWRITE_UNSTABLE && nfs_async == 0)
			*tl++ = txdr_unsigned(stable);
		else
			*tl++ = txdr_unsigned(NFSWRITE_FILESYNC);
		/*
		 * Actually, there is no need to txdr these fields,
		 * but it may make the values more human readable,
		 * for debugging purposes.
		 */
		*tl++ = txdr_unsigned(nfsboottime.tv_sec);
		*tl = txdr_unsigned(nfsboottime.tv_usec);
	} else if (!nd->nd_repstat)
		nfsrv_fillattr(nd, &nva);

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs create service (creates regular files for V2 and V3. Spec. files for V2.)
 * now does a truncate to 0 length via. setattr if it already exists
 * The core creation routine has been extracted out into nfsrv_creatsub(),
 * so it can also be used by nfsrv_open() for V4.
 */
int
nfsrvd_create(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, struct nfsexstuff *exp)
{
	struct nfsvattr nva, dirfor, diraft;
	struct nfsv2_sattr *sp;
	struct nameidata named;
	u_int32_t *tl;
	int error = 0, tsize, dirfor_ret = 1, diraft_ret = 1;
	int how = NFSCREATE_UNCHECKED, exclusive_flag = 0;
	NFSDEV_T rdev = 0;
	vnode_t vp = NULL, dirp = NULL;
	fhandle_t fh;
	char *bufp;
	u_long *hashp;
	__enum_uint8(vtype) vtyp;
	int32_t cverf[2], tverf[2] = { 0, 0 };
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
		goto out;
	}
	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, CREATE,
	    LOCKPARENT | LOCKLEAF | NOCACHE);
	nfsvno_setpathbuf(&named, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
	if (error)
		goto nfsmout;
	if (!nd->nd_repstat) {
		NFSVNO_ATTRINIT(&nva);
		if (nd->nd_flag & ND_NFSV2) {
			NFSM_DISSECT(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
			vtyp = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode));
			if (vtyp == VNON)
				vtyp = VREG;
			NFSVNO_SETATTRVAL(&nva, type, vtyp);
			NFSVNO_SETATTRVAL(&nva, mode,
			    nfstov_mode(sp->sa_mode));
			switch (nva.na_type) {
			case VREG:
				tsize = fxdr_unsigned(int32_t, sp->sa_size);
				if (tsize != -1)
					NFSVNO_SETATTRVAL(&nva, size,
					    (u_quad_t)tsize);
				break;
			case VCHR:
			case VBLK:
			case VFIFO:
				rdev = fxdr_unsigned(NFSDEV_T, sp->sa_size);
				break;
			default:
				break;
			}
		} else {
			NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
			how = fxdr_unsigned(int, *tl);
			switch (how) {
			case NFSCREATE_GUARDED:
			case NFSCREATE_UNCHECKED:
				error = nfsrv_sattr(nd, NULL, &nva, NULL, NULL, p);
				if (error)
					goto nfsmout;
				break;
			case NFSCREATE_EXCLUSIVE:
				NFSM_DISSECT(tl, u_int32_t *, NFSX_VERF);
				cverf[0] = *tl++;
				cverf[1] = *tl;
				exclusive_flag = 1;
				break;
			}
			NFSVNO_SETATTRVAL(&nva, type, VREG);
		}
	}
	if (nd->nd_repstat) {
		nfsvno_relpathbuf(&named);
		if (nd->nd_flag & ND_NFSV3) {
			dirfor_ret = nfsvno_getattr(dp, &dirfor, nd, p, 1,
			    NULL);
			nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret,
			    &diraft);
		}
		vput(dp);
		goto out;
	}

	nd->nd_repstat = nfsvno_namei(nd, &named, dp, 1, exp, &dirp);
	if (dirp) {
		if (nd->nd_flag & ND_NFSV2) {
			vrele(dirp);
			dirp = NULL;
		} else {
			dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0,
			    NULL);
		}
	}
	if (nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret,
			    &diraft);
		if (dirp)
			vrele(dirp);
		goto out;
	}

	if (!(nd->nd_flag & ND_NFSV2)) {
		switch (how) {
		case NFSCREATE_GUARDED:
			if (named.ni_vp)
				nd->nd_repstat = EEXIST;
			break;
		case NFSCREATE_UNCHECKED:
			break;
		case NFSCREATE_EXCLUSIVE:
			if (named.ni_vp == NULL)
				NFSVNO_SETATTRVAL(&nva, mode, 0);
			break;
		}
	}

	/*
	 * Iff doesn't exist, create it
	 * otherwise just truncate to 0 length
	 *   should I set the mode too ?
	 */
	nd->nd_repstat = nfsvno_createsub(nd, &named, &vp, &nva,
	    &exclusive_flag, cverf, rdev, exp);

	if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_getfh(vp, &fh, p);
		if (!nd->nd_repstat)
			nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1,
			    NULL);
		vput(vp);
		if (!nd->nd_repstat) {
			tverf[0] = nva.na_atime.tv_sec;
			tverf[1] = nva.na_atime.tv_nsec;
		}
	}
	if (nd->nd_flag & ND_NFSV2) {
		if (!nd->nd_repstat) {
			(void)nfsm_fhtom(NULL, nd, (u_int8_t *)&fh, 0, 0);
			nfsrv_fillattr(nd, &nva);
		}
	} else {
		if (exclusive_flag && !nd->nd_repstat && (cverf[0] != tverf[0]
		    || cverf[1] != tverf[1]))
			nd->nd_repstat = EEXIST;
		diraft_ret = nfsvno_getattr(dirp, &diraft, nd, p, 0, NULL);
		vrele(dirp);
		if (!nd->nd_repstat) {
			(void)nfsm_fhtom(NULL, nd, (u_int8_t *)&fh, 0, 1);
			nfsrv_postopattr(nd, 0, &nva);
		}
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
	}

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(dp);
	nfsvno_relpathbuf(&named);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs v3 mknod service (and v4 create)
 */
int
nfsrvd_mknod(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, vnode_t *vpp, fhandle_t *fhp, struct nfsexstuff *exp)
{
	struct nfsvattr nva, dirfor, diraft;
	u_int32_t *tl;
	struct nameidata named;
	int error = 0, dirfor_ret = 1, diraft_ret = 1, pathlen;
	u_int32_t major, minor;
	__enum_uint8(vtype) vtyp = VNON;
	nfstype nfs4type = NFNON;
	vnode_t vp, dirp = NULL;
	nfsattrbit_t attrbits;
	char *bufp = NULL, *pathcp = NULL;
	u_long *hashp, cnflags;
	NFSACL_T *aclp = NULL;
	struct thread *p = curthread;

	NFSVNO_ATTRINIT(&nva);
	cnflags = LOCKPARENT;
	if (nd->nd_repstat) {
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
		goto out;
	}
#ifdef NFS4_ACL_EXTATTR_NAME
	aclp = acl_alloc(M_WAITOK);
	aclp->acl_cnt = 0;
#endif

	/*
	 * For V4, the creation stuff is here, Yuck!
	 */
	if (nd->nd_flag & ND_NFSV4) {
		NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
		vtyp = nfsv34tov_type(*tl);
		nfs4type = fxdr_unsigned(nfstype, *tl);
		switch (nfs4type) {
		case NFLNK:
			error = nfsvno_getsymlink(nd, &nva, p, &pathcp,
			    &pathlen);
			if (error)
				goto nfsmout;
			break;
		case NFCHR:
		case NFBLK:
			NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
			major = fxdr_unsigned(u_int32_t, *tl++);
			minor = fxdr_unsigned(u_int32_t, *tl);
			nva.na_rdev = NFSMAKEDEV(major, minor);
			break;
		case NFSOCK:
		case NFFIFO:
			break;
		case NFDIR:
			cnflags = LOCKPARENT;
			break;
		default:
			nd->nd_repstat = NFSERR_BADTYPE;
			vrele(dp);
#ifdef NFS4_ACL_EXTATTR_NAME
			acl_free(aclp);
#endif
			goto out;
		}
	}
	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, CREATE, cnflags | NOCACHE);
	nfsvno_setpathbuf(&named, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
	if (error)
		goto nfsmout;
	if (!nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV3) {
			NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
			vtyp = nfsv34tov_type(*tl);
		}
		error = nfsrv_sattr(nd, NULL, &nva, &attrbits, aclp, p);
		if (error)
			goto nfsmout;
		nva.na_type = vtyp;
		if (!nd->nd_repstat && (nd->nd_flag & ND_NFSV3) &&
		    (vtyp == VCHR || vtyp == VBLK)) {
			NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
			major = fxdr_unsigned(u_int32_t, *tl++);
			minor = fxdr_unsigned(u_int32_t, *tl);
			nva.na_rdev = NFSMAKEDEV(major, minor);
		}
	}

	dirfor_ret = nfsvno_getattr(dp, &dirfor, nd, p, 0, NULL);
	if (!nd->nd_repstat && (nd->nd_flag & ND_NFSV4)) {
		if (!dirfor_ret && NFSVNO_ISSETGID(&nva) &&
		    dirfor.na_gid == nva.na_gid)
			NFSVNO_UNSET(&nva, gid);
		nd->nd_repstat = nfsrv_checkuidgid(nd, &nva);
	}
	if (nd->nd_repstat) {
		vrele(dp);
#ifdef NFS4_ACL_EXTATTR_NAME
		acl_free(aclp);
#endif
		nfsvno_relpathbuf(&named);
		if (pathcp)
			free(pathcp, M_TEMP);
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret,
			    &diraft);
		goto out;
	}

	/*
	 * Yuck! For V4, mkdir and link are here and some V4 clients don't fill
	 * in va_mode, so we'll have to set a default here.
	 */
	if (NFSVNO_NOTSETMODE(&nva)) {
		if (vtyp == VLNK)
			nva.na_mode = 0755;
		else
			nva.na_mode = 0400;
	}

	if (vtyp == VDIR)
		named.ni_cnd.cn_flags |= WILLBEDIR;
	nd->nd_repstat = nfsvno_namei(nd, &named, dp, 0, exp, &dirp);
	if (nd->nd_repstat) {
		if (dirp) {
			if (nd->nd_flag & ND_NFSV3)
				dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd,
				    p, 0, NULL);
			vrele(dirp);
		}
#ifdef NFS4_ACL_EXTATTR_NAME
		acl_free(aclp);
#endif
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret,
			    &diraft);
		goto out;
	}
	if (dirp)
		dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0, NULL);

	if ((nd->nd_flag & ND_NFSV4) && (vtyp == VDIR || vtyp == VLNK)) {
		if (vtyp == VDIR) {
			nfsrvd_mkdirsub(nd, &named, &nva, fhp, vpp, dirp,
			    &dirfor, &diraft, &diraft_ret, &attrbits, aclp, p,
			    exp);
#ifdef NFS4_ACL_EXTATTR_NAME
			acl_free(aclp);
#endif
			goto out;
		} else if (vtyp == VLNK) {
			nfsrvd_symlinksub(nd, &named, &nva, fhp, vpp, dirp,
			    &dirfor, &diraft, &diraft_ret, &attrbits,
			    aclp, p, exp, pathcp, pathlen);
#ifdef NFS4_ACL_EXTATTR_NAME
			acl_free(aclp);
#endif
			free(pathcp, M_TEMP);
			goto out;
		}
	}

	nd->nd_repstat = nfsvno_mknod(&named, &nva, nd->nd_cred, p);
	if (!nd->nd_repstat) {
		vp = named.ni_vp;
		nfsrv_fixattr(nd, vp, &nva, aclp, p, &attrbits, exp);
		nd->nd_repstat = nfsvno_getfh(vp, fhp, p);
		if ((nd->nd_flag & ND_NFSV3) && !nd->nd_repstat)
			nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1,
			    NULL);
		if (vpp != NULL && nd->nd_repstat == 0) {
			NFSVOPUNLOCK(vp);
			*vpp = vp;
		} else
			vput(vp);
	}

	diraft_ret = nfsvno_getattr(dirp, &diraft, nd, p, 0, NULL);
	vrele(dirp);
	if (!nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV3) {
			(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, 0, 1);
			nfsrv_postopattr(nd, 0, &nva);
		} else {
			NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
			*tl++ = newnfs_false;
			txdr_hyper(dirfor.na_filerev, tl);
			tl += 2;
			txdr_hyper(diraft.na_filerev, tl);
			(void) nfsrv_putattrbit(nd, &attrbits);
		}
	}
	if (nd->nd_flag & ND_NFSV3)
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
#ifdef NFS4_ACL_EXTATTR_NAME
	acl_free(aclp);
#endif

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vrele(dp);
#ifdef NFS4_ACL_EXTATTR_NAME
	acl_free(aclp);
#endif
	if (bufp)
		nfsvno_relpathbuf(&named);
	if (pathcp)
		free(pathcp, M_TEMP);

	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs remove service
 */
int
nfsrvd_remove(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, struct nfsexstuff *exp)
{
	struct nameidata named;
	u_int32_t *tl;
	int error = 0, dirfor_ret = 1, diraft_ret = 1;
	vnode_t dirp = NULL;
	struct nfsvattr dirfor, diraft;
	char *bufp;
	u_long *hashp;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
		goto out;
	}
	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, DELETE,
	    LOCKPARENT | LOCKLEAF);
	nfsvno_setpathbuf(&named, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
	if (error) {
		vput(dp);
		nfsvno_relpathbuf(&named);
		goto out;
	}
	if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_namei(nd, &named, dp, 1, exp, &dirp);
	} else {
		vput(dp);
		nfsvno_relpathbuf(&named);
	}
	if (dirp) {
		if (!(nd->nd_flag & ND_NFSV2)) {
			dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0,
			    NULL);
		} else {
			vrele(dirp);
			dirp = NULL;
		}
	}
	if (!nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV4) {
			if (named.ni_vp->v_type == VDIR)
				nd->nd_repstat = nfsvno_rmdirsub(&named, 1,
				    nd->nd_cred, p, exp);
			else
				nd->nd_repstat = nfsvno_removesub(&named, 1,
				    nd->nd_cred, p, exp);
		} else if (nd->nd_procnum == NFSPROC_RMDIR) {
			nd->nd_repstat = nfsvno_rmdirsub(&named, 0,
			    nd->nd_cred, p, exp);
		} else {
			nd->nd_repstat = nfsvno_removesub(&named, 0,
			    nd->nd_cred, p, exp);
		}
	}
	if (!(nd->nd_flag & ND_NFSV2)) {
		if (dirp) {
			diraft_ret = nfsvno_getattr(dirp, &diraft, nd, p, 0,
			    NULL);
			vrele(dirp);
		}
		if (nd->nd_flag & ND_NFSV3) {
			nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret,
			    &diraft);
		} else if (!nd->nd_repstat) {
			NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
			*tl++ = newnfs_false;
			txdr_hyper(dirfor.na_filerev, tl);
			tl += 2;
			txdr_hyper(diraft.na_filerev, tl);
		}
	}

out:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs rename service
 */
int
nfsrvd_rename(struct nfsrv_descript *nd, int isdgram,
    vnode_t dp, vnode_t todp, struct nfsexstuff *exp, struct nfsexstuff *toexp)
{
	u_int32_t *tl;
	int error = 0, fdirfor_ret = 1, fdiraft_ret = 1;
	int tdirfor_ret = 1, tdiraft_ret = 1;
	struct nameidata fromnd, tond;
	vnode_t fdirp = NULL, tdirp = NULL, tdp = NULL;
	struct nfsvattr fdirfor, fdiraft, tdirfor, tdiraft;
	struct nfsexstuff tnes;
	struct nfsrvfh tfh;
	char *bufp, *tbufp = NULL;
	u_long *hashp;
	fhandle_t fh;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_wcc(nd, fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
		nfsrv_wcc(nd, tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
		goto out;
	}
	if (!(nd->nd_flag & ND_NFSV2))
		fdirfor_ret = nfsvno_getattr(dp, &fdirfor, nd, p, 1, NULL);
	tond.ni_cnd.cn_nameiop = 0;
	tond.ni_startdir = NULL;
	NFSNAMEICNDSET(&fromnd.ni_cnd, nd->nd_cred, DELETE, WANTPARENT);
	nfsvno_setpathbuf(&fromnd, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &fromnd.ni_pathlen);
	if (error) {
		vput(dp);
		if (todp)
			vrele(todp);
		nfsvno_relpathbuf(&fromnd);
		goto out;
	}
	/*
	 * Unlock dp in this code section, so it is unlocked before
	 * tdp gets locked. This avoids a potential LOR if tdp is the
	 * parent directory of dp.
	 */
	if (nd->nd_flag & ND_NFSV4) {
		tdp = todp;
		tnes = *toexp;
		if (dp != tdp) {
			NFSVOPUNLOCK(dp);
			/* Might lock tdp. */
			tdirfor_ret = nfsvno_getattr(tdp, &tdirfor, nd, p, 0,
			    NULL);
		} else {
			tdirfor_ret = nfsvno_getattr(tdp, &tdirfor, nd, p, 1,
			    NULL);
			NFSVOPUNLOCK(dp);
		}
	} else {
		tfh.nfsrvfh_len = 0;
		error = nfsrv_mtofh(nd, &tfh);
		if (error == 0)
			error = nfsvno_getfh(dp, &fh, p);
		if (error) {
			vput(dp);
			/* todp is always NULL except NFSv4 */
			nfsvno_relpathbuf(&fromnd);
			goto out;
		}

		/* If this is the same file handle, just VREF() the vnode. */
		if (tfh.nfsrvfh_len == NFSX_MYFH &&
		    !NFSBCMP(tfh.nfsrvfh_data, &fh, NFSX_MYFH)) {
			VREF(dp);
			tdp = dp;
			tnes = *exp;
			tdirfor_ret = nfsvno_getattr(tdp, &tdirfor, nd, p, 1,
			    NULL);
			NFSVOPUNLOCK(dp);
		} else {
			NFSVOPUNLOCK(dp);
			nd->nd_cred->cr_uid = nd->nd_saveduid;
			nfsd_fhtovp(nd, &tfh, LK_EXCLUSIVE, &tdp, &tnes, NULL,
			    0, -1);	/* Locks tdp. */
			if (tdp) {
				tdirfor_ret = nfsvno_getattr(tdp, &tdirfor, nd,
				    p, 1, NULL);
				NFSVOPUNLOCK(tdp);
			}
		}
	}
	NFSNAMEICNDSET(&tond.ni_cnd, nd->nd_cred, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE);
	nfsvno_setpathbuf(&tond, &tbufp, &hashp);
	if (!nd->nd_repstat) {
		error = nfsrv_parsename(nd, tbufp, hashp, &tond.ni_pathlen);
		if (error) {
			if (tdp)
				vrele(tdp);
			vrele(dp);
			nfsvno_relpathbuf(&fromnd);
			nfsvno_relpathbuf(&tond);
			goto out;
		}
	}
	if (nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV3) {
			nfsrv_wcc(nd, fdirfor_ret, &fdirfor, fdiraft_ret,
			    &fdiraft);
			nfsrv_wcc(nd, tdirfor_ret, &tdirfor, tdiraft_ret,
			    &tdiraft);
		}
		if (tdp)
			vrele(tdp);
		vrele(dp);
		nfsvno_relpathbuf(&fromnd);
		nfsvno_relpathbuf(&tond);
		goto out;
	}

	/*
	 * Done parsing, now down to business.
	 */
	nd->nd_repstat = nfsvno_namei(nd, &fromnd, dp, 0, exp, &fdirp);
	if (nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV3) {
			nfsrv_wcc(nd, fdirfor_ret, &fdirfor, fdiraft_ret,
			    &fdiraft);
			nfsrv_wcc(nd, tdirfor_ret, &tdirfor, tdiraft_ret,
			    &tdiraft);
		}
		if (fdirp)
			vrele(fdirp);
		if (tdp)
			vrele(tdp);
		nfsvno_relpathbuf(&tond);
		goto out;
	}
	if (fromnd.ni_vp->v_type == VDIR)
		tond.ni_cnd.cn_flags |= WILLBEDIR;
	nd->nd_repstat = nfsvno_namei(nd, &tond, tdp, 0, &tnes, &tdirp);
	nd->nd_repstat = nfsvno_rename(&fromnd, &tond, nd->nd_repstat,
	    nd->nd_flag, nd->nd_cred, p);
	if (fdirp)
		fdiraft_ret = nfsvno_getattr(fdirp, &fdiraft, nd, p, 0, NULL);
	if (tdirp)
		tdiraft_ret = nfsvno_getattr(tdirp, &tdiraft, nd, p, 0, NULL);
	if (fdirp)
		vrele(fdirp);
	if (tdirp)
		vrele(tdirp);
	if (nd->nd_flag & ND_NFSV3) {
		nfsrv_wcc(nd, fdirfor_ret, &fdirfor, fdiraft_ret, &fdiraft);
		nfsrv_wcc(nd, tdirfor_ret, &tdirfor, tdiraft_ret, &tdiraft);
	} else if ((nd->nd_flag & ND_NFSV4) && !nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, 10 * NFSX_UNSIGNED);
		*tl++ = newnfs_false;
		txdr_hyper(fdirfor.na_filerev, tl);
		tl += 2;
		txdr_hyper(fdiraft.na_filerev, tl);
		tl += 2;
		*tl++ = newnfs_false;
		txdr_hyper(tdirfor.na_filerev, tl);
		tl += 2;
		txdr_hyper(tdiraft.na_filerev, tl);
	}

out:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs link service
 */
int
nfsrvd_link(struct nfsrv_descript *nd, int isdgram,
    vnode_t vp, vnode_t tovp, struct nfsexstuff *exp, struct nfsexstuff *toexp)
{
	struct nameidata named;
	u_int32_t *tl;
	int error = 0, dirfor_ret = 1, diraft_ret = 1, getret = 1;
	vnode_t dirp = NULL, dp = NULL;
	struct nfsvattr dirfor, diraft, at;
	struct nfsexstuff tnes;
	struct nfsrvfh dfh;
	char *bufp;
	u_long *hashp;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, getret, &at);
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
		goto out;
	}
	NFSVOPUNLOCK(vp);
	if (vp->v_type == VDIR) {
		if (nd->nd_flag & ND_NFSV4)
			nd->nd_repstat = NFSERR_ISDIR;
		else
			nd->nd_repstat = NFSERR_INVAL;
		if (tovp)
			vrele(tovp);
	}
	if (!nd->nd_repstat) {
		if (nd->nd_flag & ND_NFSV4) {
			dp = tovp;
			tnes = *toexp;
		} else {
			error = nfsrv_mtofh(nd, &dfh);
			if (error) {
				vrele(vp);
				/* tovp is always NULL unless NFSv4 */
				goto out;
			}
			nfsd_fhtovp(nd, &dfh, LK_EXCLUSIVE, &dp, &tnes, NULL,
			    0, -1);
			if (dp)
				NFSVOPUNLOCK(dp);
		}
	}
	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, CREATE, LOCKPARENT | NOCACHE);
	if (!nd->nd_repstat) {
		nfsvno_setpathbuf(&named, &bufp, &hashp);
		error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
		if (error) {
			vrele(vp);
			if (dp)
				vrele(dp);
			nfsvno_relpathbuf(&named);
			goto out;
		}
		if (!nd->nd_repstat) {
			nd->nd_repstat = nfsvno_namei(nd, &named, dp, 0, &tnes,
			    &dirp);
		} else {
			if (dp)
				vrele(dp);
			nfsvno_relpathbuf(&named);
		}
	}
	if (dirp) {
		if (nd->nd_flag & ND_NFSV2) {
			vrele(dirp);
			dirp = NULL;
		} else {
			dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0,
			    NULL);
		}
	}
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsvno_link(&named, vp, nd->nd_cred, p, exp);
	if (nd->nd_flag & ND_NFSV3)
		getret = nfsvno_getattr(vp, &at, nd, p, 0, NULL);
	if (dirp) {
		diraft_ret = nfsvno_getattr(dirp, &diraft, nd, p, 0, NULL);
		vrele(dirp);
	}
	vrele(vp);
	if (nd->nd_flag & ND_NFSV3) {
		nfsrv_postopattr(nd, getret, &at);
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
	} else if ((nd->nd_flag & ND_NFSV4) && !nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
		*tl++ = newnfs_false;
		txdr_hyper(dirfor.na_filerev, tl);
		tl += 2;
		txdr_hyper(diraft.na_filerev, tl);
	}

out:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs symbolic link service
 */
int
nfsrvd_symlink(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, vnode_t *vpp, fhandle_t *fhp, struct nfsexstuff *exp)
{
	struct nfsvattr nva, dirfor, diraft;
	struct nameidata named;
	int error = 0, dirfor_ret = 1, diraft_ret = 1, pathlen;
	vnode_t dirp = NULL;
	char *bufp, *pathcp = NULL;
	u_long *hashp;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
		goto out;
	}
	if (vpp)
		*vpp = NULL;
	NFSVNO_ATTRINIT(&nva);
	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, CREATE,
	    LOCKPARENT | NOCACHE);
	nfsvno_setpathbuf(&named, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
	if (!error && !nd->nd_repstat)
		error = nfsvno_getsymlink(nd, &nva, p, &pathcp, &pathlen);
	if (error) {
		vrele(dp);
		nfsvno_relpathbuf(&named);
		goto out;
	}
	if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_namei(nd, &named, dp, 0, exp, &dirp);
	} else {
		vrele(dp);
		nfsvno_relpathbuf(&named);
	}
	if (dirp != NULL && !(nd->nd_flag & ND_NFSV3)) {
		vrele(dirp);
		dirp = NULL;
	}

	/*
	 * And call nfsrvd_symlinksub() to do the common code. It will
	 * return EBADRPC upon a parsing error, 0 otherwise.
	 */
	if (!nd->nd_repstat) {
		if (dirp != NULL)
			dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0,
			    NULL);
		nfsrvd_symlinksub(nd, &named, &nva, fhp, vpp, dirp,
		    &dirfor, &diraft, &diraft_ret, NULL, NULL, p, exp,
		    pathcp, pathlen);
	} else if (dirp != NULL) {
		dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0, NULL);
		vrele(dirp);
	}
	if (pathcp)
		free(pathcp, M_TEMP);

	if (nd->nd_flag & ND_NFSV3) {
		if (!nd->nd_repstat) {
			(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, 0, 1);
			nfsrv_postopattr(nd, 0, &nva);
		}
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
	}

out:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * Common code for creating a symbolic link.
 */
static void
nfsrvd_symlinksub(struct nfsrv_descript *nd, struct nameidata *ndp,
    struct nfsvattr *nvap, fhandle_t *fhp, vnode_t *vpp,
    vnode_t dirp, struct nfsvattr *dirforp, struct nfsvattr *diraftp,
    int *diraft_retp, nfsattrbit_t *attrbitp,
    NFSACL_T *aclp, NFSPROC_T *p, struct nfsexstuff *exp, char *pathcp,
    int pathlen)
{
	u_int32_t *tl;

	nd->nd_repstat = nfsvno_symlink(ndp, nvap, pathcp, pathlen,
	    !(nd->nd_flag & ND_NFSV2), nd->nd_saveduid, nd->nd_cred, p, exp);
	if (!nd->nd_repstat && !(nd->nd_flag & ND_NFSV2)) {
		nfsrv_fixattr(nd, ndp->ni_vp, nvap, aclp, p, attrbitp, exp);
		if (nd->nd_flag & ND_NFSV3) {
			nd->nd_repstat = nfsvno_getfh(ndp->ni_vp, fhp, p);
			if (!nd->nd_repstat)
				nd->nd_repstat = nfsvno_getattr(ndp->ni_vp,
				    nvap, nd, p, 1, NULL);
		}
		if (vpp != NULL && nd->nd_repstat == 0) {
			NFSVOPUNLOCK(ndp->ni_vp);
			*vpp = ndp->ni_vp;
		} else
			vput(ndp->ni_vp);
	}
	if (dirp) {
		*diraft_retp = nfsvno_getattr(dirp, diraftp, nd, p, 0, NULL);
		vrele(dirp);
	}
	if ((nd->nd_flag & ND_NFSV4) && !nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
		*tl++ = newnfs_false;
		txdr_hyper(dirforp->na_filerev, tl);
		tl += 2;
		txdr_hyper(diraftp->na_filerev, tl);
		(void) nfsrv_putattrbit(nd, attrbitp);
	}

	NFSEXITCODE2(0, nd);
}

/*
 * nfs mkdir service
 */
int
nfsrvd_mkdir(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, vnode_t *vpp, fhandle_t *fhp, struct nfsexstuff *exp)
{
	struct nfsvattr nva, dirfor, diraft;
	struct nameidata named;
	u_int32_t *tl;
	int error = 0, dirfor_ret = 1, diraft_ret = 1;
	vnode_t dirp = NULL;
	char *bufp;
	u_long *hashp;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
		goto out;
	}
	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, CREATE, LOCKPARENT | NOCACHE);
	nfsvno_setpathbuf(&named, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
	if (error)
		goto nfsmout;
	if (!nd->nd_repstat) {
		NFSVNO_ATTRINIT(&nva);
		if (nd->nd_flag & ND_NFSV3) {
			error = nfsrv_sattr(nd, NULL, &nva, NULL, NULL, p);
			if (error)
				goto nfsmout;
		} else {
			NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
			nva.na_mode = nfstov_mode(*tl++);
		}
	}
	if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_namei(nd, &named, dp, 0, exp, &dirp);
	} else {
		vrele(dp);
		nfsvno_relpathbuf(&named);
	}
	if (dirp != NULL && !(nd->nd_flag & ND_NFSV3)) {
		vrele(dirp);
		dirp = NULL;
	}
	if (nd->nd_repstat) {
		if (dirp != NULL) {
			dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0,
			    NULL);
			vrele(dirp);
		}
		if (nd->nd_flag & ND_NFSV3)
			nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret,
			    &diraft);
		goto out;
	}
	if (dirp != NULL)
		dirfor_ret = nfsvno_getattr(dirp, &dirfor, nd, p, 0, NULL);

	/*
	 * Call nfsrvd_mkdirsub() for the code common to V4 as well.
	 */
	nfsrvd_mkdirsub(nd, &named, &nva, fhp, vpp, dirp, &dirfor, &diraft,
	    &diraft_ret, NULL, NULL, p, exp);

	if (nd->nd_flag & ND_NFSV3) {
		if (!nd->nd_repstat) {
			(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, 0, 1);
			nfsrv_postopattr(nd, 0, &nva);
		}
		nfsrv_wcc(nd, dirfor_ret, &dirfor, diraft_ret, &diraft);
	} else if (!nd->nd_repstat) {
		(void)nfsm_fhtom(NULL, nd, (u_int8_t *)fhp, 0, 0);
		nfsrv_fillattr(nd, &nva);
	}

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vrele(dp);
	nfsvno_relpathbuf(&named);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * Code common to mkdir for V2,3 and 4.
 */
static void
nfsrvd_mkdirsub(struct nfsrv_descript *nd, struct nameidata *ndp,
    struct nfsvattr *nvap, fhandle_t *fhp, vnode_t *vpp,
    vnode_t dirp, struct nfsvattr *dirforp, struct nfsvattr *diraftp,
    int *diraft_retp, nfsattrbit_t *attrbitp, NFSACL_T *aclp,
    NFSPROC_T *p, struct nfsexstuff *exp)
{
	vnode_t vp;
	u_int32_t *tl;

	NFSVNO_SETATTRVAL(nvap, type, VDIR);
	nd->nd_repstat = nfsvno_mkdir(ndp, nvap, nd->nd_saveduid,
	    nd->nd_cred, p, exp);
	if (!nd->nd_repstat) {
		vp = ndp->ni_vp;
		nfsrv_fixattr(nd, vp, nvap, aclp, p, attrbitp, exp);
		nd->nd_repstat = nfsvno_getfh(vp, fhp, p);
		if (!(nd->nd_flag & ND_NFSV4) && !nd->nd_repstat)
			nd->nd_repstat = nfsvno_getattr(vp, nvap, nd, p, 1,
			    NULL);
		if (vpp && !nd->nd_repstat) {
			NFSVOPUNLOCK(vp);
			*vpp = vp;
		} else {
			vput(vp);
		}
	}
	if (dirp) {
		*diraft_retp = nfsvno_getattr(dirp, diraftp, nd, p, 0, NULL);
		vrele(dirp);
	}
	if ((nd->nd_flag & ND_NFSV4) && !nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
		*tl++ = newnfs_false;
		txdr_hyper(dirforp->na_filerev, tl);
		tl += 2;
		txdr_hyper(diraftp->na_filerev, tl);
		(void) nfsrv_putattrbit(nd, attrbitp);
	}

	NFSEXITCODE2(0, nd);
}

/*
 * nfs commit service
 */
int
nfsrvd_commit(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	struct nfsvattr bfor, aft;
	u_int32_t *tl;
	int error = 0, for_ret = 1, aft_ret = 1, cnt;
	u_int64_t off;
	struct thread *p = curthread;

       if (nd->nd_repstat) {
		nfsrv_wcc(nd, for_ret, &bfor, aft_ret, &aft);
		goto out;
	}

	/* Return NFSERR_ISDIR in NFSv4 when commit on a directory. */
	if (vp->v_type != VREG) {
		if (nd->nd_flag & ND_NFSV3)
			error = NFSERR_NOTSUPP;
		else
			error = (vp->v_type == VDIR) ? NFSERR_ISDIR : NFSERR_INVAL;
		goto nfsmout;
	}
	NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);

	/*
	 * XXX At this time VOP_FSYNC() does not accept offset and byte
	 * count parameters, so these arguments are useless (someday maybe).
	 */
	off = fxdr_hyper(tl);
	tl += 2;
	cnt = fxdr_unsigned(int, *tl);
	if (nd->nd_flag & ND_NFSV3)
		for_ret = nfsvno_getattr(vp, &bfor, nd, p, 1, NULL);
	nd->nd_repstat = nfsvno_fsync(vp, off, cnt, nd->nd_cred, p);
	if (nd->nd_flag & ND_NFSV3) {
		aft_ret = nfsvno_getattr(vp, &aft, nd, p, 1, NULL);
		nfsrv_wcc(nd, for_ret, &bfor, aft_ret, &aft);
	}
	vput(vp);
	if (!nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, NFSX_VERF);
		*tl++ = txdr_unsigned(nfsboottime.tv_sec);
		*tl = txdr_unsigned(nfsboottime.tv_usec);
	}

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs statfs service
 */
int
nfsrvd_statfs(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	struct statfs *sf;
	u_int32_t *tl;
	int getret = 1;
	struct nfsvattr at;
	u_quad_t tval;
	struct thread *p = curthread;

	sf = NULL;
	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, getret, &at);
		goto out;
	}
	sf = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
	nd->nd_repstat = nfsvno_statfs(vp, sf);
	getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL);
	vput(vp);
	if (nd->nd_flag & ND_NFSV3)
		nfsrv_postopattr(nd, getret, &at);
	if (nd->nd_repstat)
		goto out;
	if (nd->nd_flag & ND_NFSV2) {
		NFSM_BUILD(tl, u_int32_t *, NFSX_V2STATFS);
		*tl++ = txdr_unsigned(NFS_V2MAXDATA);
		*tl++ = txdr_unsigned(sf->f_bsize);
		*tl++ = txdr_unsigned(sf->f_blocks);
		*tl++ = txdr_unsigned(sf->f_bfree);
		*tl = txdr_unsigned(sf->f_bavail);
	} else {
		NFSM_BUILD(tl, u_int32_t *, NFSX_V3STATFS);
		tval = (u_quad_t)sf->f_blocks;
		tval *= (u_quad_t)sf->f_bsize;
		txdr_hyper(tval, tl); tl += 2;
		tval = (u_quad_t)sf->f_bfree;
		tval *= (u_quad_t)sf->f_bsize;
		txdr_hyper(tval, tl); tl += 2;
		tval = (u_quad_t)sf->f_bavail;
		tval *= (u_quad_t)sf->f_bsize;
		txdr_hyper(tval, tl); tl += 2;
		tval = (u_quad_t)sf->f_files;
		txdr_hyper(tval, tl); tl += 2;
		tval = (u_quad_t)sf->f_ffree;
		txdr_hyper(tval, tl); tl += 2;
		tval = (u_quad_t)sf->f_ffree;
		txdr_hyper(tval, tl); tl += 2;
		*tl = 0;
	}

out:
	free(sf, M_STATFS);
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfs fsinfo service
 */
int
nfsrvd_fsinfo(struct nfsrv_descript *nd, int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	struct nfsfsinfo fs;
	int getret = 1;
	struct nfsvattr at;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, getret, &at);
		goto out;
	}
	getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL);
	nfsvno_getfs(&fs, isdgram);
	vput(vp);
	nfsrv_postopattr(nd, getret, &at);
	NFSM_BUILD(tl, u_int32_t *, NFSX_V3FSINFO);
	*tl++ = txdr_unsigned(fs.fs_rtmax);
	*tl++ = txdr_unsigned(fs.fs_rtpref);
	*tl++ = txdr_unsigned(fs.fs_rtmult);
	*tl++ = txdr_unsigned(fs.fs_wtmax);
	*tl++ = txdr_unsigned(fs.fs_wtpref);
	*tl++ = txdr_unsigned(fs.fs_wtmult);
	*tl++ = txdr_unsigned(fs.fs_dtpref);
	txdr_hyper(fs.fs_maxfilesize, tl);
	tl += 2;
	txdr_nfsv3time(&fs.fs_timedelta, tl);
	tl += 2;
	*tl = txdr_unsigned(fs.fs_properties);

out:
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfs pathconf service
 */
int
nfsrvd_pathconf(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	struct nfsv3_pathconf *pc;
	int getret = 1;
	long linkmax, namemax, chownres, notrunc;
	struct nfsvattr at;
	struct thread *p = curthread;

	if (nd->nd_repstat) {
		nfsrv_postopattr(nd, getret, &at);
		goto out;
	}
	nd->nd_repstat = nfsvno_pathconf(vp, _PC_LINK_MAX, &linkmax,
	    nd->nd_cred, p);
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsvno_pathconf(vp, _PC_NAME_MAX, &namemax,
		    nd->nd_cred, p);
	if (!nd->nd_repstat)
		nd->nd_repstat=nfsvno_pathconf(vp, _PC_CHOWN_RESTRICTED,
		    &chownres, nd->nd_cred, p);
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsvno_pathconf(vp, _PC_NO_TRUNC, &notrunc,
		    nd->nd_cred, p);
	getret = nfsvno_getattr(vp, &at, nd, p, 1, NULL);
	vput(vp);
	nfsrv_postopattr(nd, getret, &at);
	if (!nd->nd_repstat) {
		NFSM_BUILD(pc, struct nfsv3_pathconf *, NFSX_V3PATHCONF);
		pc->pc_linkmax = txdr_unsigned(linkmax);
		pc->pc_namemax = txdr_unsigned(namemax);
		pc->pc_notrunc = txdr_unsigned(notrunc);
		pc->pc_chownrestricted = txdr_unsigned(chownres);

		/*
		 * These should probably be supported by VOP_PATHCONF(), but
		 * until msdosfs is exportable (why would you want to?), the
		 * Unix defaults should be ok.
		 */
		pc->pc_caseinsensitive = newnfs_false;
		pc->pc_casepreserving = newnfs_true;
	}

out:
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfsv4 lock service
 */
int
nfsrvd_lock(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int i;
	struct nfsstate *stp = NULL;
	struct nfslock *lop;
	struct nfslockconflict cf;
	int error = 0;
	u_short flags = NFSLCK_LOCK, lflags;
	u_int64_t offset, len;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
	i = fxdr_unsigned(int, *tl++);
	switch (i) {
	case NFSV4LOCKT_READW:
		flags |= NFSLCK_BLOCKING;
	case NFSV4LOCKT_READ:
		lflags = NFSLCK_READ;
		break;
	case NFSV4LOCKT_WRITEW:
		flags |= NFSLCK_BLOCKING;
	case NFSV4LOCKT_WRITE:
		lflags = NFSLCK_WRITE;
		break;
	default:
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	if (*tl++ == newnfs_true)
		flags |= NFSLCK_RECLAIM;
	offset = fxdr_hyper(tl);
	tl += 2;
	len = fxdr_hyper(tl);
	tl += 2;
	if (*tl == newnfs_true)
		flags |= NFSLCK_OPENTOLOCK;
	if (flags & NFSLCK_OPENTOLOCK) {
		NFSM_DISSECT(tl, u_int32_t *, 5 * NFSX_UNSIGNED + NFSX_STATEID);
		i = fxdr_unsigned(int, *(tl+4+(NFSX_STATEID / NFSX_UNSIGNED)));
		if (i <= 0 || i > NFSV4_OPAQUELIMIT) {
			nd->nd_repstat = NFSERR_BADXDR;
			goto nfsmout;
		}
		stp = malloc(sizeof (struct nfsstate) + i,
			M_NFSDSTATE, M_WAITOK);
		stp->ls_ownerlen = i;
		stp->ls_op = nd->nd_rp;
		stp->ls_seq = fxdr_unsigned(int, *tl++);
		stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
		NFSBCOPY((caddr_t)tl, (caddr_t)stp->ls_stateid.other,
			NFSX_STATEIDOTHER);
		tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);

		/*
		 * For the special stateid of other all 0s and seqid == 1, set
		 * the stateid to the current stateid, if it is set.
		 */
		if ((nd->nd_flag & ND_NFSV41) != 0 &&
		    stp->ls_stateid.seqid == 1 &&
		    stp->ls_stateid.other[0] == 0 &&
		    stp->ls_stateid.other[1] == 0 &&
		    stp->ls_stateid.other[2] == 0) {
			if ((nd->nd_flag & ND_CURSTATEID) != 0) {
				stp->ls_stateid = nd->nd_curstateid;
				stp->ls_stateid.seqid = 0;
			} else {
				nd->nd_repstat = NFSERR_BADSTATEID;
				goto nfsmout;
			}
		}

		stp->ls_opentolockseq = fxdr_unsigned(int, *tl++);
		clientid.lval[0] = *tl++;
		clientid.lval[1] = *tl++;
		if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				clientid.qval = nd->nd_clientid.qval;
			else if (nd->nd_clientid.qval != clientid.qval)
				printf("EEK3 multiple clids\n");
		} else {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				printf("EEK! no clientid from session\n");
			nd->nd_flag |= ND_IMPLIEDCLID;
			nd->nd_clientid.qval = clientid.qval;
		}
		error = nfsrv_mtostr(nd, stp->ls_owner, stp->ls_ownerlen);
		if (error)
			goto nfsmout;
	} else {
		NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + NFSX_UNSIGNED);
		stp = malloc(sizeof (struct nfsstate),
			M_NFSDSTATE, M_WAITOK);
		stp->ls_ownerlen = 0;
		stp->ls_op = nd->nd_rp;
		stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
		NFSBCOPY((caddr_t)tl, (caddr_t)stp->ls_stateid.other,
			NFSX_STATEIDOTHER);
		tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);

		/*
		 * For the special stateid of other all 0s and seqid == 1, set
		 * the stateid to the current stateid, if it is set.
		 */
		if ((nd->nd_flag & ND_NFSV41) != 0 &&
		    stp->ls_stateid.seqid == 1 &&
		    stp->ls_stateid.other[0] == 0 &&
		    stp->ls_stateid.other[1] == 0 &&
		    stp->ls_stateid.other[2] == 0) {
			if ((nd->nd_flag & ND_CURSTATEID) != 0) {
				stp->ls_stateid = nd->nd_curstateid;
				stp->ls_stateid.seqid = 0;
			} else {
				nd->nd_repstat = NFSERR_BADSTATEID;
				goto nfsmout;
			}
		}

		stp->ls_seq = fxdr_unsigned(int, *tl);
		clientid.lval[0] = stp->ls_stateid.other[0];
		clientid.lval[1] = stp->ls_stateid.other[1];
		if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				clientid.qval = nd->nd_clientid.qval;
			else if (nd->nd_clientid.qval != clientid.qval)
				printf("EEK4 multiple clids\n");
		} else {
			if ((nd->nd_flag & ND_NFSV41) != 0)
				printf("EEK! no clientid from session\n");
			nd->nd_flag |= ND_IMPLIEDCLID;
			nd->nd_clientid.qval = clientid.qval;
		}
	}
	lop = malloc(sizeof (struct nfslock),
		M_NFSDLOCK, M_WAITOK);
	lop->lo_first = offset;
	if (len == NFS64BITSSET) {
		lop->lo_end = NFS64BITSSET;
	} else {
		lop->lo_end = offset + len;
		if (lop->lo_end <= lop->lo_first)
			nd->nd_repstat = NFSERR_INVAL;
	}
	lop->lo_flags = lflags;
	stp->ls_flags = flags;
	stp->ls_uid = nd->nd_cred->cr_uid;

	/*
	 * Do basic access checking.
	 */
	if (!nd->nd_repstat && vp->v_type != VREG) {
	    if (vp->v_type == VDIR)
		nd->nd_repstat = NFSERR_ISDIR;
	    else
		nd->nd_repstat = NFSERR_INVAL;
	}
	if (!nd->nd_repstat) {
	    if (lflags & NFSLCK_WRITE) {
		nd->nd_repstat = nfsvno_accchk(vp, VWRITE,
		    nd->nd_cred, exp, p, NFSACCCHK_ALLOWOWNER,
		    NFSACCCHK_VPISLOCKED, NULL);
	    } else {
		nd->nd_repstat = nfsvno_accchk(vp, VREAD,
		    nd->nd_cred, exp, p, NFSACCCHK_ALLOWOWNER,
		    NFSACCCHK_VPISLOCKED, NULL);
		if (nd->nd_repstat)
		    nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
			nd->nd_cred, exp, p, NFSACCCHK_ALLOWOWNER,
			NFSACCCHK_VPISLOCKED, NULL);
	    }
	}

	/*
	 * We call nfsrv_lockctrl() even if nd_repstat set, so that the
	 * seqid# gets updated. nfsrv_lockctrl() will return the value
	 * of nd_repstat, if it gets that far.
	 */
	nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, &cf, clientid, 
		&stateid, exp, nd, p);
	if (lop)
		free(lop, M_NFSDLOCK);
	if (stp)
		free(stp, M_NFSDSTATE);
	if (!nd->nd_repstat) {
		/* For NFSv4.1, set the Current StateID. */
		if ((nd->nd_flag & ND_NFSV41) != 0) {
			nd->nd_curstateid = stateid;
			nd->nd_flag |= ND_CURSTATEID;
		}
		NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
		*tl++ = txdr_unsigned(stateid.seqid);
		NFSBCOPY((caddr_t)stateid.other,(caddr_t)tl,NFSX_STATEIDOTHER);
	} else if (nd->nd_repstat == NFSERR_DENIED) {
		NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
		txdr_hyper(cf.cl_first, tl);
		tl += 2;
		if (cf.cl_end == NFS64BITSSET)
			len = NFS64BITSSET;
		else
			len = cf.cl_end - cf.cl_first;
		txdr_hyper(len, tl);
		tl += 2;
		if (cf.cl_flags == NFSLCK_WRITE)
			*tl++ = txdr_unsigned(NFSV4LOCKT_WRITE);
		else
			*tl++ = txdr_unsigned(NFSV4LOCKT_READ);
		*tl++ = stateid.other[0];
		*tl = stateid.other[1];
		(void) nfsm_strtom(nd, cf.cl_owner, cf.cl_ownerlen);
	}
	vput(vp);
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	if (stp)
		free(stp, M_NFSDSTATE);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 lock test service
 */
int
nfsrvd_lockt(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int i;
	struct nfsstate *stp = NULL;
	struct nfslock lo, *lop = &lo;
	struct nfslockconflict cf;
	int error = 0;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	u_int64_t len;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, u_int32_t *, 8 * NFSX_UNSIGNED);
	i = fxdr_unsigned(int, *(tl + 7));
	if (i <= 0 || i > NFSV4_OPAQUELIMIT) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	stp = malloc(sizeof (struct nfsstate) + i,
	    M_NFSDSTATE, M_WAITOK);
	stp->ls_ownerlen = i;
	stp->ls_op = NULL;
	stp->ls_flags = NFSLCK_TEST;
	stp->ls_uid = nd->nd_cred->cr_uid;
	i = fxdr_unsigned(int, *tl++);
	switch (i) {
	case NFSV4LOCKT_READW:
		stp->ls_flags |= NFSLCK_BLOCKING;
	case NFSV4LOCKT_READ:
		lo.lo_flags = NFSLCK_READ;
		break;
	case NFSV4LOCKT_WRITEW:
		stp->ls_flags |= NFSLCK_BLOCKING;
	case NFSV4LOCKT_WRITE:
		lo.lo_flags = NFSLCK_WRITE;
		break;
	default:
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	lo.lo_first = fxdr_hyper(tl);
	tl += 2;
	len = fxdr_hyper(tl);
	if (len == NFS64BITSSET) {
		lo.lo_end = NFS64BITSSET;
	} else {
		lo.lo_end = lo.lo_first + len;
		if (lo.lo_end <= lo.lo_first)
			nd->nd_repstat = NFSERR_INVAL;
	}
	tl += 2;
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK5 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	error = nfsrv_mtostr(nd, stp->ls_owner, stp->ls_ownerlen);
	if (error)
		goto nfsmout;
	if (!nd->nd_repstat && vp->v_type != VREG) {
	    if (vp->v_type == VDIR)
		nd->nd_repstat = NFSERR_ISDIR;
	    else
		nd->nd_repstat = NFSERR_INVAL;
	}
	if (!nd->nd_repstat)
	  nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, &cf, clientid,
	    &stateid, exp, nd, p);
	if (nd->nd_repstat) {
	    if (nd->nd_repstat == NFSERR_DENIED) {
		NFSM_BUILD(tl, u_int32_t *, 7 * NFSX_UNSIGNED);
		txdr_hyper(cf.cl_first, tl);
		tl += 2;
		if (cf.cl_end == NFS64BITSSET)
			len = NFS64BITSSET;
		else
			len = cf.cl_end - cf.cl_first;
		txdr_hyper(len, tl);
		tl += 2;
		if (cf.cl_flags == NFSLCK_WRITE)
			*tl++ = txdr_unsigned(NFSV4LOCKT_WRITE);
		else
			*tl++ = txdr_unsigned(NFSV4LOCKT_READ);
		*tl++ = stp->ls_stateid.other[0];
		*tl = stp->ls_stateid.other[1];
		(void) nfsm_strtom(nd, cf.cl_owner, cf.cl_ownerlen);
	    }
	}
	vput(vp);
	if (stp)
		free(stp, M_NFSDSTATE);
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	if (stp)
		free(stp, M_NFSDSTATE);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 unlock service
 */
int
nfsrvd_locku(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int i;
	struct nfsstate *stp;
	struct nfslock *lop;
	int error = 0;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	u_int64_t len;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED + NFSX_STATEID);
	stp = malloc(sizeof (struct nfsstate),
	    M_NFSDSTATE, M_WAITOK);
	lop = malloc(sizeof (struct nfslock),
	    M_NFSDLOCK, M_WAITOK);
	stp->ls_flags = NFSLCK_UNLOCK;
	lop->lo_flags = NFSLCK_UNLOCK;
	stp->ls_op = nd->nd_rp;
	i = fxdr_unsigned(int, *tl++);
	switch (i) {
	case NFSV4LOCKT_READW:
		stp->ls_flags |= NFSLCK_BLOCKING;
	case NFSV4LOCKT_READ:
		break;
	case NFSV4LOCKT_WRITEW:
		stp->ls_flags |= NFSLCK_BLOCKING;
	case NFSV4LOCKT_WRITE:
		break;
	default:
		nd->nd_repstat = NFSERR_BADXDR;
		free(stp, M_NFSDSTATE);
		free(lop, M_NFSDLOCK);
		goto nfsmout;
	}
	stp->ls_ownerlen = 0;
	stp->ls_uid = nd->nd_cred->cr_uid;
	stp->ls_seq = fxdr_unsigned(int, *tl++);
	stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
	NFSBCOPY((caddr_t)tl, (caddr_t)stp->ls_stateid.other,
	    NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);

	/*
	 * For the special stateid of other all 0s and seqid == 1, set the
	 * stateid to the current stateid, if it is set.
	 */
	if ((nd->nd_flag & ND_NFSV41) != 0 && stp->ls_stateid.seqid == 1 &&
	    stp->ls_stateid.other[0] == 0 && stp->ls_stateid.other[1] == 0 &&
	    stp->ls_stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0) {
			stp->ls_stateid = nd->nd_curstateid;
			stp->ls_stateid.seqid = 0;
		} else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			free(stp, M_NFSDSTATE);
			free(lop, M_NFSDLOCK);
			goto nfsmout;
		}
	}

	lop->lo_first = fxdr_hyper(tl);
	tl += 2;
	len = fxdr_hyper(tl);
	if (len == NFS64BITSSET) {
		lop->lo_end = NFS64BITSSET;
	} else {
		lop->lo_end = lop->lo_first + len;
		if (lop->lo_end <= lop->lo_first)
			nd->nd_repstat = NFSERR_INVAL;
	}
	clientid.lval[0] = stp->ls_stateid.other[0];
	clientid.lval[1] = stp->ls_stateid.other[1];
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK6 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	if (!nd->nd_repstat && vp->v_type != VREG) {
	    if (vp->v_type == VDIR)
		nd->nd_repstat = NFSERR_ISDIR;
	    else
		nd->nd_repstat = NFSERR_INVAL;
	}
	/*
	 * Call nfsrv_lockctrl() even if nd_repstat is set, so that the
	 * seqid# gets incremented. nfsrv_lockctrl() will return the
	 * value of nd_repstat, if it gets that far.
	 */
	nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
	    &stateid, exp, nd, p);
	if (stp)
		free(stp, M_NFSDSTATE);
	if (lop)
		free(lop, M_NFSDLOCK);
	if (!nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
		*tl++ = txdr_unsigned(stateid.seqid);
		NFSBCOPY((caddr_t)stateid.other,(caddr_t)tl,NFSX_STATEIDOTHER);
	}
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 open service
 */
int
nfsrvd_open(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, vnode_t *vpp, __unused fhandle_t *fhp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int i, retext;
	struct nfsstate *stp = NULL;
	int error = 0, create, claim, exclusive_flag = 0, override;
	u_int32_t rflags = NFSV4OPEN_LOCKTYPEPOSIX, acemask;
	int how = NFSCREATE_UNCHECKED;
	int32_t cverf[2], tverf[2] = { 0, 0 };
	vnode_t vp = NULL, dirp = NULL;
	struct nfsvattr nva, dirfor, diraft;
	struct nameidata named;
	nfsv4stateid_t stateid, delegstateid;
	nfsattrbit_t attrbits;
	nfsquad_t clientid;
	char *bufp = NULL;
	u_long *hashp;
	NFSACL_T *aclp = NULL;
	struct thread *p = curthread;
	bool done_namei;

#ifdef NFS4_ACL_EXTATTR_NAME
	aclp = acl_alloc(M_WAITOK);
	aclp->acl_cnt = 0;
#endif
	NFSZERO_ATTRBIT(&attrbits);
	done_namei = false;
	named.ni_cnd.cn_nameiop = 0;
	NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
	i = fxdr_unsigned(int, *(tl + 5));
	if (i <= 0 || i > NFSV4_OPAQUELIMIT) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	stp = malloc(sizeof (struct nfsstate) + i,
	    M_NFSDSTATE, M_WAITOK);
	stp->ls_ownerlen = i;
	stp->ls_op = nd->nd_rp;
	stp->ls_flags = NFSLCK_OPEN;
	stp->ls_uid = nd->nd_cred->cr_uid;
	stp->ls_seq = fxdr_unsigned(u_int32_t, *tl++);
	i = fxdr_unsigned(int, *tl++);
	retext = 0;
	if ((i & (NFSV4OPEN_WANTDELEGMASK | NFSV4OPEN_WANTSIGNALDELEG |
	    NFSV4OPEN_WANTPUSHDELEG)) != 0 && (nd->nd_flag & ND_NFSV41) != 0) {
		retext = 1;
		/* For now, ignore these. */
		i &= ~(NFSV4OPEN_WANTPUSHDELEG | NFSV4OPEN_WANTSIGNALDELEG);
		switch (i & NFSV4OPEN_WANTDELEGMASK) {
		case NFSV4OPEN_WANTANYDELEG:
			stp->ls_flags |= (NFSLCK_WANTRDELEG |
			    NFSLCK_WANTWDELEG);
			i &= ~NFSV4OPEN_WANTDELEGMASK;
			break;
		case NFSV4OPEN_WANTREADDELEG:
			stp->ls_flags |= NFSLCK_WANTRDELEG;
			i &= ~NFSV4OPEN_WANTDELEGMASK;
			break;
		case NFSV4OPEN_WANTWRITEDELEG:
			stp->ls_flags |= NFSLCK_WANTWDELEG;
			i &= ~NFSV4OPEN_WANTDELEGMASK;
			break;
		case NFSV4OPEN_WANTNODELEG:
			stp->ls_flags |= NFSLCK_WANTNODELEG;
			i &= ~NFSV4OPEN_WANTDELEGMASK;
			break;
		case NFSV4OPEN_WANTCANCEL:
			printf("NFSv4: ignore Open WantCancel\n");
			i &= ~NFSV4OPEN_WANTDELEGMASK;
			break;
		default:
			/* nd_repstat will be set to NFSERR_INVAL below. */
			break;
		}
	}
	switch (i) {
	case NFSV4OPEN_ACCESSREAD:
		stp->ls_flags |= NFSLCK_READACCESS;
		break;
	case NFSV4OPEN_ACCESSWRITE:
		stp->ls_flags |= NFSLCK_WRITEACCESS;
		break;
	case NFSV4OPEN_ACCESSBOTH:
		stp->ls_flags |= (NFSLCK_READACCESS | NFSLCK_WRITEACCESS);
		break;
	default:
		nd->nd_repstat = NFSERR_INVAL;
	}
	i = fxdr_unsigned(int, *tl++);
	switch (i) {
	case NFSV4OPEN_DENYNONE:
		break;
	case NFSV4OPEN_DENYREAD:
		stp->ls_flags |= NFSLCK_READDENY;
		break;
	case NFSV4OPEN_DENYWRITE:
		stp->ls_flags |= NFSLCK_WRITEDENY;
		break;
	case NFSV4OPEN_DENYBOTH:
		stp->ls_flags |= (NFSLCK_READDENY | NFSLCK_WRITEDENY);
		break;
	default:
		nd->nd_repstat = NFSERR_INVAL;
	}
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK7 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	error = nfsrv_mtostr(nd, stp->ls_owner, stp->ls_ownerlen);
	if (error)
		goto nfsmout;
	NFSVNO_ATTRINIT(&nva);
	NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
	create = fxdr_unsigned(int, *tl);
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsvno_getattr(dp, &dirfor, nd, p, 0, NULL);
	if (create == NFSV4OPEN_CREATE) {
		nva.na_type = VREG;
		nva.na_mode = 0;
		NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
		how = fxdr_unsigned(int, *tl);
		switch (how) {
		case NFSCREATE_UNCHECKED:
		case NFSCREATE_GUARDED:
			error = nfsv4_sattr(nd, NULL, &nva, &attrbits, aclp, p);
			if (error)
				goto nfsmout;
			/*
			 * If the na_gid being set is the same as that of
			 * the directory it is going in, clear it, since
			 * that is what will be set by default. This allows
			 * a user that isn't in that group to do the create.
			 */
			if (!nd->nd_repstat && NFSVNO_ISSETGID(&nva) &&
			    nva.na_gid == dirfor.na_gid)
				NFSVNO_UNSET(&nva, gid);
			if (!nd->nd_repstat)
				nd->nd_repstat = nfsrv_checkuidgid(nd, &nva);
			break;
		case NFSCREATE_EXCLUSIVE:
			NFSM_DISSECT(tl, u_int32_t *, NFSX_VERF);
			cverf[0] = *tl++;
			cverf[1] = *tl;
			break;
		case NFSCREATE_EXCLUSIVE41:
			NFSM_DISSECT(tl, u_int32_t *, NFSX_VERF);
			cverf[0] = *tl++;
			cverf[1] = *tl;
			error = nfsv4_sattr(nd, NULL, &nva, &attrbits, aclp, p);
			if (error != 0)
				goto nfsmout;
			if (NFSISSET_ATTRBIT(&attrbits,
			    NFSATTRBIT_TIMEACCESSSET))
				nd->nd_repstat = NFSERR_INVAL;
			/*
			 * If the na_gid being set is the same as that of
			 * the directory it is going in, clear it, since
			 * that is what will be set by default. This allows
			 * a user that isn't in that group to do the create.
			 */
			if (nd->nd_repstat == 0 && NFSVNO_ISSETGID(&nva) &&
			    nva.na_gid == dirfor.na_gid)
				NFSVNO_UNSET(&nva, gid);
			if (nd->nd_repstat == 0)
				nd->nd_repstat = nfsrv_checkuidgid(nd, &nva);
			break;
		default:
			nd->nd_repstat = NFSERR_BADXDR;
			goto nfsmout;
		}
	} else if (create != NFSV4OPEN_NOCREATE) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}

	/*
	 * Now, handle the claim, which usually includes looking up a
	 * name in the directory referenced by dp. The exception is
	 * NFSV4OPEN_CLAIMPREVIOUS.
	 */
	NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
	claim = fxdr_unsigned(int, *tl);
	if (claim == NFSV4OPEN_CLAIMDELEGATECUR) {
		NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
		stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
		NFSBCOPY((caddr_t)tl,(caddr_t)stateid.other,NFSX_STATEIDOTHER);
		stp->ls_flags |= NFSLCK_DELEGCUR;
	} else if (claim == NFSV4OPEN_CLAIMDELEGATECURFH) {
		/* Fill in most of the stateid from the clientid. */
		stateid.seqid = 0;
		stateid.other[0] = clientid.lval[0];
		stateid.other[1] = clientid.lval[1];
		stateid.other[2] = 0;
		stp->ls_flags |= NFSLCK_DELEGCUR;
	} else if (claim == NFSV4OPEN_CLAIMDELEGATEPREV || claim ==
	    NFSV4OPEN_CLAIMDELEGATEPREVFH) {
		stp->ls_flags |= NFSLCK_DELEGPREV;
	}
	if (claim == NFSV4OPEN_CLAIMNULL || claim == NFSV4OPEN_CLAIMDELEGATECUR
	    || claim == NFSV4OPEN_CLAIMDELEGATEPREV) {
		if (!nd->nd_repstat && create == NFSV4OPEN_CREATE &&
		    claim != NFSV4OPEN_CLAIMNULL)
			nd->nd_repstat = NFSERR_INVAL;
		if (nd->nd_repstat) {
			nd->nd_repstat = nfsrv_opencheck(clientid,
			    &stateid, stp, NULL, nd, p, nd->nd_repstat);
			goto nfsmout;
		}
		if (create == NFSV4OPEN_CREATE)
		    NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, CREATE,
			LOCKPARENT | LOCKLEAF | NOCACHE);
		else
		    NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, LOOKUP,
			LOCKLEAF);
		nfsvno_setpathbuf(&named, &bufp, &hashp);
		error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
		if (error) {
			vrele(dp);
#ifdef NFS4_ACL_EXTATTR_NAME
			acl_free(aclp);
#endif
			free(stp, M_NFSDSTATE);
			nfsvno_relpathbuf(&named);
			NFSEXITCODE2(error, nd);
			return (error);
		}
		if (!nd->nd_repstat) {
			nd->nd_repstat = nfsvno_namei(nd, &named, dp, 0, exp,
			    &dirp);
		} else {
			vrele(dp);
			nfsvno_relpathbuf(&named);
		}
		if (create == NFSV4OPEN_CREATE) {
		    switch (how) {
		    case NFSCREATE_UNCHECKED:
			if (nd->nd_repstat == 0 && named.ni_vp != NULL) {
				/*
				 * Clear the setable attribute bits, except
				 * for Size, if it is being truncated.
				 */
				NFSZERO_ATTRBIT(&attrbits);
				if (NFSVNO_ISSETSIZE(&nva))
					NFSSETBIT_ATTRBIT(&attrbits,
					    NFSATTRBIT_SIZE);
			}
			break;
		    case NFSCREATE_GUARDED:
			if (nd->nd_repstat == 0 && named.ni_vp != NULL) {
				nd->nd_repstat = EEXIST;
				done_namei = true;
			}
			break;
		    case NFSCREATE_EXCLUSIVE:
			exclusive_flag = 1;
			if (nd->nd_repstat == 0 && named.ni_vp == NULL)
				nva.na_mode = 0;
			break;
		    case NFSCREATE_EXCLUSIVE41:
			exclusive_flag = 1;
			break;
		    }
		}
		nfsvno_open(nd, &named, clientid, &stateid, stp,
		    &exclusive_flag, &nva, cverf, create, aclp, &attrbits,
		    nd->nd_cred, done_namei, exp, &vp);
	} else if (claim == NFSV4OPEN_CLAIMPREVIOUS || claim ==
	    NFSV4OPEN_CLAIMFH || claim == NFSV4OPEN_CLAIMDELEGATECURFH ||
	    claim == NFSV4OPEN_CLAIMDELEGATEPREVFH) {
		if (claim == NFSV4OPEN_CLAIMPREVIOUS) {
			NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
			i = fxdr_unsigned(int, *tl);
			switch (i) {
			case NFSV4OPEN_DELEGATEREAD:
				stp->ls_flags |= NFSLCK_DELEGREAD;
				break;
			case NFSV4OPEN_DELEGATEWRITE:
				stp->ls_flags |= NFSLCK_DELEGWRITE;
			case NFSV4OPEN_DELEGATENONE:
				break;
			default:
				nd->nd_repstat = NFSERR_BADXDR;
				goto nfsmout;
			}
			stp->ls_flags |= NFSLCK_RECLAIM;
		} else {
			if (nd->nd_repstat == 0 && create == NFSV4OPEN_CREATE)
				nd->nd_repstat = NFSERR_INVAL;
		}
		vp = dp;
		NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
		if (!VN_IS_DOOMED(vp))
			nd->nd_repstat = nfsrv_opencheck(clientid, &stateid,
			    stp, vp, nd, p, nd->nd_repstat);
		else
			nd->nd_repstat = NFSERR_PERM;
	} else {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}

	/*
	 * Do basic access checking.
	 */
	if (!nd->nd_repstat && vp->v_type != VREG) {
		/*
		 * The IETF working group decided that this is the correct
		 * error return for all non-regular files.
		 */
		nd->nd_repstat = (vp->v_type == VDIR) ? NFSERR_ISDIR : NFSERR_SYMLINK;
	}

	/*
	 * If the Open is being done for a file that already exists, apply
	 * normal permission checking including for the file owner, if
	 * vfs.nfsd.v4openaccess is set.
	 * Previously, the owner was always allowed to open the file to
	 * be consistent with the NFS tradition of always allowing the
	 * owner of the file to write to the file regardless of permissions.
	 * It now appears that the Linux client expects the owner
	 * permissions to be checked for opens that are not creating the
	 * file.  I believe the correct approach is to use the Access
	 * operation's results to be consistent with NFSv3, but that is
	 * not what the current Linux client appears to be doing.
	 * Since both the Linux and OpenSolaris NFSv4 servers do this check,
	 * I have enabled it by default.  Since Linux does not apply this
	 * check for claim_delegate_cur, this code does the same.
	 * If this semantic change causes a problem, it can be disabled by
	 * setting the sysctl vfs.nfsd.v4openaccess to 0 to re-enable the
	 * previous semantics.
	 */
	if (nfsrv_openaccess && create == NFSV4OPEN_NOCREATE &&
	    (stp->ls_flags & NFSLCK_DELEGCUR) == 0)
		override = NFSACCCHK_NOOVERRIDE;
	else
		override = NFSACCCHK_ALLOWOWNER;
	if (!nd->nd_repstat && (stp->ls_flags & NFSLCK_WRITEACCESS))
	    nd->nd_repstat = nfsvno_accchk(vp, VWRITE, nd->nd_cred,
	        exp, p, override, NFSACCCHK_VPISLOCKED, NULL);
	if (!nd->nd_repstat && (stp->ls_flags & NFSLCK_READACCESS)) {
	    nd->nd_repstat = nfsvno_accchk(vp, VREAD, nd->nd_cred,
	        exp, p, override, NFSACCCHK_VPISLOCKED, NULL);
	    if (nd->nd_repstat)
		nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
		    nd->nd_cred, exp, p, override,
		    NFSACCCHK_VPISLOCKED, NULL);
	}

	if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
		if (!nd->nd_repstat) {
			tverf[0] = nva.na_atime.tv_sec;
			tverf[1] = nva.na_atime.tv_nsec;
		}
	}
	if (!nd->nd_repstat && exclusive_flag && (cverf[0] != tverf[0] ||
	    cverf[1] != tverf[1]))
		nd->nd_repstat = EEXIST;
	/*
	 * Do the open locking/delegation stuff.
	 */
	if (!nd->nd_repstat)
	    nd->nd_repstat = nfsrv_openctrl(nd, vp, &stp, clientid, &stateid,
		&delegstateid, &rflags, exp, p, nva.na_filerev);

	/*
	 * vp must be unlocked before the call to nfsvno_getattr(dirp,...)
	 * below, to avoid a deadlock with the lookup in nfsvno_namei() above.
	 * (ie: Leave the NFSVOPUNLOCK() about here.)
	 */
	if (vp)
		NFSVOPUNLOCK(vp);
	if (stp)
		free(stp, M_NFSDSTATE);
	if (!nd->nd_repstat && dirp)
		nd->nd_repstat = nfsvno_getattr(dirp, &diraft, nd, p, 0, NULL);
	if (!nd->nd_repstat) {
		/* For NFSv4.1, set the Current StateID. */
		if ((nd->nd_flag & ND_NFSV41) != 0) {
			nd->nd_curstateid = stateid;
			nd->nd_flag |= ND_CURSTATEID;
		}
		NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID + 6 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(stateid.seqid);
		NFSBCOPY((caddr_t)stateid.other,(caddr_t)tl,NFSX_STATEIDOTHER);
		tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
		if (claim == NFSV4OPEN_CLAIMPREVIOUS) {
			*tl++ = newnfs_true;
			*tl++ = 0;
			*tl++ = 0;
			*tl++ = 0;
			*tl++ = 0;
		} else {
			*tl++ = newnfs_false;	/* Since dirp is not locked */
			txdr_hyper(dirfor.na_filerev, tl);
			tl += 2;
			txdr_hyper(diraft.na_filerev, tl);
			tl += 2;
		}
		*tl = txdr_unsigned(rflags & NFSV4OPEN_RFLAGS);
		(void) nfsrv_putattrbit(nd, &attrbits);
		NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
		if (rflags & NFSV4OPEN_READDELEGATE)
			*tl = txdr_unsigned(NFSV4OPEN_DELEGATEREAD);
		else if (rflags & NFSV4OPEN_WRITEDELEGATE)
			*tl = txdr_unsigned(NFSV4OPEN_DELEGATEWRITE);
		else if (retext != 0) {
			*tl = txdr_unsigned(NFSV4OPEN_DELEGATENONEEXT);
			if ((rflags & NFSV4OPEN_WDNOTWANTED) != 0) {
				NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
				*tl = txdr_unsigned(NFSV4OPEN_NOTWANTED);
			} else if ((rflags & NFSV4OPEN_WDSUPPFTYPE) != 0) {
				NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
				*tl = txdr_unsigned(NFSV4OPEN_NOTSUPPFTYPE);
			} else if ((rflags & NFSV4OPEN_WDCONTENTION) != 0) {
				NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
				*tl++ = txdr_unsigned(NFSV4OPEN_CONTENTION);
				*tl = newnfs_false;
			} else if ((rflags & NFSV4OPEN_WDRESOURCE) != 0) {
				NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
				*tl++ = txdr_unsigned(NFSV4OPEN_RESOURCE);
				*tl = newnfs_false;
			} else {
				NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
				*tl = txdr_unsigned(NFSV4OPEN_NOTWANTED);
			}
		} else
			*tl = txdr_unsigned(NFSV4OPEN_DELEGATENONE);
		if (rflags & (NFSV4OPEN_READDELEGATE|NFSV4OPEN_WRITEDELEGATE)) {
			NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID+NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(delegstateid.seqid);
			NFSBCOPY((caddr_t)delegstateid.other, (caddr_t)tl,
			    NFSX_STATEIDOTHER);
			tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
			if (rflags & NFSV4OPEN_RECALL)
				*tl = newnfs_true;
			else
				*tl = newnfs_false;
			if (rflags & NFSV4OPEN_WRITEDELEGATE) {
				NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
				*tl++ = txdr_unsigned(NFSV4OPEN_LIMITSIZE);
				txdr_hyper(nva.na_size, tl);
			}
			NFSM_BUILD(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(NFSV4ACE_ALLOWEDTYPE);
			*tl++ = txdr_unsigned(0x0);
			acemask = NFSV4ACE_ALLFILESMASK;
			if (nva.na_mode & S_IRUSR)
			    acemask |= NFSV4ACE_READMASK;
			if (nva.na_mode & S_IWUSR)
			    acemask |= NFSV4ACE_WRITEMASK;
			if (nva.na_mode & S_IXUSR)
			    acemask |= NFSV4ACE_EXECUTEMASK;
			*tl = txdr_unsigned(acemask);
			(void) nfsm_strtom(nd, "OWNER@", 6);
		}
		*vpp = vp;
	} else if (vp) {
		vrele(vp);
	}
	if (dirp)
		vrele(dirp);
#ifdef NFS4_ACL_EXTATTR_NAME
	acl_free(aclp);
#endif
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vrele(dp);
#ifdef NFS4_ACL_EXTATTR_NAME
	acl_free(aclp);
#endif
	if (stp)
		free(stp, M_NFSDSTATE);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 close service
 */
int
nfsrvd_close(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	struct nfsstate st, *stp = &st;
	int error = 0, writeacc;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	struct nfsvattr na;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_STATEID);
	stp->ls_seq = fxdr_unsigned(u_int32_t, *tl++);
	stp->ls_ownerlen = 0;
	stp->ls_op = nd->nd_rp;
	stp->ls_uid = nd->nd_cred->cr_uid;
	stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
	NFSBCOPY((caddr_t)tl, (caddr_t)stp->ls_stateid.other,
	    NFSX_STATEIDOTHER);

	/*
	 * For the special stateid of other all 0s and seqid == 1, set the
	 * stateid to the current stateid, if it is set.
	 */
	if ((nd->nd_flag & ND_NFSV41) != 0 && stp->ls_stateid.seqid == 1 &&
	    stp->ls_stateid.other[0] == 0 && stp->ls_stateid.other[1] == 0 &&
	    stp->ls_stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0)
			stp->ls_stateid = nd->nd_curstateid;
		else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	stp->ls_flags = NFSLCK_CLOSE;
	clientid.lval[0] = stp->ls_stateid.other[0];
	clientid.lval[1] = stp->ls_stateid.other[1];
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK8 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	nd->nd_repstat = nfsrv_openupdate(vp, stp, clientid, &stateid, nd, p,
	    &writeacc);
	/* For pNFS, update the attributes. */
	if (writeacc != 0 || nfsrv_pnfsatime != 0)
		nfsrv_updatemdsattr(vp, &na, p);
	vput(vp);
	if (!nd->nd_repstat) {
		/*
		 * If the stateid that has been closed is the current stateid,
		 * unset it.
		 */
		if ((nd->nd_flag & ND_CURSTATEID) != 0 &&
		    stateid.other[0] == nd->nd_curstateid.other[0] &&
		    stateid.other[1] == nd->nd_curstateid.other[1] &&
		    stateid.other[2] == nd->nd_curstateid.other[2])
			nd->nd_flag &= ~ND_CURSTATEID;
		NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
		*tl++ = txdr_unsigned(stateid.seqid);
		NFSBCOPY((caddr_t)stateid.other,(caddr_t)tl,NFSX_STATEIDOTHER);
	}
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 delegpurge service
 */
int
nfsrvd_delegpurge(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int error = 0;
	nfsquad_t clientid;
	struct thread *p = curthread;

	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK9 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	nd->nd_repstat = nfsrv_delegupdate(nd, clientid, NULL, NULL,
	    NFSV4OP_DELEGPURGE, nd->nd_cred, p, NULL);
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 delegreturn service
 */
int
nfsrvd_delegreturn(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int error = 0, writeacc;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	struct nfsvattr na;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID);
	stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
	NFSBCOPY((caddr_t)tl, (caddr_t)stateid.other, NFSX_STATEIDOTHER);
	clientid.lval[0] = stateid.other[0];
	clientid.lval[1] = stateid.other[1];
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK10 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	nd->nd_repstat = nfsrv_delegupdate(nd, clientid, &stateid, vp,
	    NFSV4OP_DELEGRETURN, nd->nd_cred, p, &writeacc);
	/* For pNFS, update the attributes. */
	if (writeacc != 0 || nfsrv_pnfsatime != 0)
		nfsrv_updatemdsattr(vp, &na, p);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 get file handle service
 */
int
nfsrvd_getfh(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	fhandle_t fh;
	struct thread *p = curthread;

	nd->nd_repstat = nfsvno_getfh(vp, &fh, p);
	vput(vp);
	if (!nd->nd_repstat)
		(void)nfsm_fhtom(NULL, nd, (u_int8_t *)&fh, 0, 0);
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfsv4 open confirm service
 */
int
nfsrvd_openconfirm(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	struct nfsstate st, *stp = &st;
	int error = 0;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	struct thread *p = curthread;

	if ((nd->nd_flag & ND_NFSV41) != 0) {
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}
	NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + NFSX_UNSIGNED);
	stp->ls_ownerlen = 0;
	stp->ls_op = nd->nd_rp;
	stp->ls_uid = nd->nd_cred->cr_uid;
	stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
	NFSBCOPY((caddr_t)tl, (caddr_t)stp->ls_stateid.other,
	    NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
	stp->ls_seq = fxdr_unsigned(u_int32_t, *tl);
	stp->ls_flags = NFSLCK_CONFIRM;
	clientid.lval[0] = stp->ls_stateid.other[0];
	clientid.lval[1] = stp->ls_stateid.other[1];
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK11 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	nd->nd_repstat = nfsrv_openupdate(vp, stp, clientid, &stateid, nd, p,
	    NULL);
	if (!nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
		*tl++ = txdr_unsigned(stateid.seqid);
		NFSBCOPY((caddr_t)stateid.other,(caddr_t)tl,NFSX_STATEIDOTHER);
	}
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 open downgrade service
 */
int
nfsrvd_opendowngrade(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int i;
	struct nfsstate st, *stp = &st;
	int error = 0;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	struct thread *p = curthread;

	/* opendowngrade can only work on a file object.*/
	if (vp->v_type != VREG) {
		error = NFSERR_INVAL;
		goto nfsmout;
	}
	NFSM_DISSECT(tl, u_int32_t *, NFSX_STATEID + 3 * NFSX_UNSIGNED);
	stp->ls_ownerlen = 0;
	stp->ls_op = nd->nd_rp;
	stp->ls_uid = nd->nd_cred->cr_uid;
	stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
	NFSBCOPY((caddr_t)tl, (caddr_t)stp->ls_stateid.other,
	    NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);

	/*
	 * For the special stateid of other all 0s and seqid == 1, set the
	 * stateid to the current stateid, if it is set.
	 */
	if ((nd->nd_flag & ND_NFSV41) != 0 && stp->ls_stateid.seqid == 1 &&
	    stp->ls_stateid.other[0] == 0 && stp->ls_stateid.other[1] == 0 &&
	    stp->ls_stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0)
			stp->ls_stateid = nd->nd_curstateid;
		else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	stp->ls_seq = fxdr_unsigned(u_int32_t, *tl++);
	i = fxdr_unsigned(int, *tl++);
	if ((nd->nd_flag & ND_NFSV41) != 0)
		i &= ~NFSV4OPEN_WANTDELEGMASK;
	switch (i) {
	case NFSV4OPEN_ACCESSREAD:
		stp->ls_flags = (NFSLCK_READACCESS | NFSLCK_DOWNGRADE);
		break;
	case NFSV4OPEN_ACCESSWRITE:
		stp->ls_flags = (NFSLCK_WRITEACCESS | NFSLCK_DOWNGRADE);
		break;
	case NFSV4OPEN_ACCESSBOTH:
		stp->ls_flags = (NFSLCK_READACCESS | NFSLCK_WRITEACCESS |
		    NFSLCK_DOWNGRADE);
		break;
	default:
		nd->nd_repstat = NFSERR_INVAL;
	}
	i = fxdr_unsigned(int, *tl);
	switch (i) {
	case NFSV4OPEN_DENYNONE:
		break;
	case NFSV4OPEN_DENYREAD:
		stp->ls_flags |= NFSLCK_READDENY;
		break;
	case NFSV4OPEN_DENYWRITE:
		stp->ls_flags |= NFSLCK_WRITEDENY;
		break;
	case NFSV4OPEN_DENYBOTH:
		stp->ls_flags |= (NFSLCK_READDENY | NFSLCK_WRITEDENY);
		break;
	default:
		nd->nd_repstat = NFSERR_INVAL;
	}

	clientid.lval[0] = stp->ls_stateid.other[0];
	clientid.lval[1] = stp->ls_stateid.other[1];
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK12 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsrv_openupdate(vp, stp, clientid, &stateid,
		    nd, p, NULL);
	if (!nd->nd_repstat) {
		/* For NFSv4.1, set the Current StateID. */
		if ((nd->nd_flag & ND_NFSV41) != 0) {
			nd->nd_curstateid = stateid;
			nd->nd_flag |= ND_CURSTATEID;
		}
		NFSM_BUILD(tl, u_int32_t *, NFSX_STATEID);
		*tl++ = txdr_unsigned(stateid.seqid);
		NFSBCOPY((caddr_t)stateid.other,(caddr_t)tl,NFSX_STATEIDOTHER);
	}
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 renew lease service
 */
int
nfsrvd_renew(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int error = 0;
	nfsquad_t clientid;
	struct thread *p = curthread;

	if ((nd->nd_flag & ND_NFSV41) != 0) {
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}
	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, u_int32_t *, NFSX_HYPER);
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK13 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	nd->nd_repstat = nfsrv_getclient(clientid, (CLOPS_RENEWOP|CLOPS_RENEW),
	    NULL, NULL, (nfsquad_t)((u_quad_t)0), 0, nd, p);
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 security info service
 */
int
nfsrvd_secinfo(struct nfsrv_descript *nd, int isdgram,
    vnode_t dp, struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int len;
	struct nameidata named;
	vnode_t dirp = NULL, vp;
	struct nfsrvfh fh;
	struct nfsexstuff retnes;
	u_int32_t *sizp;
	int error = 0, i;
	uint64_t savflag;
	char *bufp;
	u_long *hashp;
	struct thread *p = curthread;

	/*
	 * All this just to get the export flags for the name.
	 */
	NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, LOOKUP,
	    LOCKLEAF);
	nfsvno_setpathbuf(&named, &bufp, &hashp);
	error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
	if (error) {
		vput(dp);
		nfsvno_relpathbuf(&named);
		goto out;
	}
	if (!nd->nd_repstat) {
		nd->nd_repstat = nfsvno_namei(nd, &named, dp, 1, exp, &dirp);
	} else {
		vput(dp);
		nfsvno_relpathbuf(&named);
	}
	if (dirp)
		vrele(dirp);
	if (nd->nd_repstat)
		goto out;
	nfsvno_relpathbuf(&named);
	fh.nfsrvfh_len = NFSX_MYFH;
	vp = named.ni_vp;
	nd->nd_repstat = nfsvno_getfh(vp, (fhandle_t *)fh.nfsrvfh_data, p);
	vput(vp);
	savflag = nd->nd_flag;
	if (!nd->nd_repstat) {
		/*
		 * Pretend the next op is Secinfo, so that no wrongsec
		 * test will be done.
		 */
		nfsd_fhtovp(nd, &fh, LK_SHARED, &vp, &retnes, NULL, 0,
		    NFSV4OP_SECINFO);
		if (vp)
			vput(vp);
	}
	nd->nd_flag = savflag;
	if (nd->nd_repstat)
		goto out;

	/*
	 * Finally have the export flags for name, so we can create
	 * the security info.
	 */
	len = 0;
	NFSM_BUILD(sizp, u_int32_t *, NFSX_UNSIGNED);

	/* If nes_numsecflavor == 0, all are allowed. */
	if (retnes.nes_numsecflavor == 0) {
		NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(RPCAUTH_UNIX);
		*tl = txdr_unsigned(RPCAUTH_GSS);
		nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
		    nfsgss_mechlist[KERBV_MECH].len);
		NFSM_BUILD(tl, uint32_t *, 3 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(GSS_KERBV_QOP);
		*tl++ = txdr_unsigned(RPCAUTHGSS_SVCNONE);
		*tl = txdr_unsigned(RPCAUTH_GSS);
		nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
		    nfsgss_mechlist[KERBV_MECH].len);
		NFSM_BUILD(tl, uint32_t *, 3 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(GSS_KERBV_QOP);
		*tl++ = txdr_unsigned(RPCAUTHGSS_SVCINTEGRITY);
		*tl = txdr_unsigned(RPCAUTH_GSS);
		nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
		    nfsgss_mechlist[KERBV_MECH].len);
		NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(GSS_KERBV_QOP);
		*tl = txdr_unsigned(RPCAUTHGSS_SVCPRIVACY);
		len = 4;
	}
	for (i = 0; i < retnes.nes_numsecflavor; i++) {
		if (retnes.nes_secflavors[i] == AUTH_SYS) {
			NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
			*tl = txdr_unsigned(RPCAUTH_UNIX);
			len++;
		} else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5) {
			NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(RPCAUTH_GSS);
			(void) nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
			    nfsgss_mechlist[KERBV_MECH].len);
			NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(GSS_KERBV_QOP);
			*tl = txdr_unsigned(RPCAUTHGSS_SVCNONE);
			len++;
		} else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5I) {
			NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(RPCAUTH_GSS);
			(void) nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
			    nfsgss_mechlist[KERBV_MECH].len);
			NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(GSS_KERBV_QOP);
			*tl = txdr_unsigned(RPCAUTHGSS_SVCINTEGRITY);
			len++;
		} else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5P) {
			NFSM_BUILD(tl, u_int32_t *, NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(RPCAUTH_GSS);
			(void) nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
			    nfsgss_mechlist[KERBV_MECH].len);
			NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(GSS_KERBV_QOP);
			*tl = txdr_unsigned(RPCAUTHGSS_SVCPRIVACY);
			len++;
		}
	}
	*sizp = txdr_unsigned(len);

out:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 security info no name service
 */
int
nfsrvd_secinfononame(struct nfsrv_descript *nd, int isdgram,
    vnode_t dp, struct nfsexstuff *exp)
{
	uint32_t *tl, *sizp;
	struct nameidata named;
	vnode_t dirp = NULL, vp;
	struct nfsrvfh fh;
	struct nfsexstuff retnes;
	int error = 0, fhstyle, i, len;
	uint64_t savflag;
	char *bufp;
	u_long *hashp;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	fhstyle = fxdr_unsigned(int, *tl);
	switch (fhstyle) {
	case NFSSECINFONONAME_PARENT:
		if (dp->v_type != VDIR) {
			vput(dp);
			nd->nd_repstat = NFSERR_NOTDIR;
			goto nfsmout;
		}
		NFSNAMEICNDSET(&named.ni_cnd, nd->nd_cred, LOOKUP,
		    LOCKLEAF);
		nfsvno_setpathbuf(&named, &bufp, &hashp);
		error = nfsrv_parsename(nd, bufp, hashp, &named.ni_pathlen);
		if (error != 0) {
			vput(dp);
			nfsvno_relpathbuf(&named);
			goto nfsmout;
		}
		if (nd->nd_repstat == 0)
			nd->nd_repstat = nfsvno_namei(nd, &named, dp, 1, exp, &dirp);
		else
			vput(dp);
		if (dirp != NULL)
			vrele(dirp);
		nfsvno_relpathbuf(&named);
		vp = named.ni_vp;
		break;
	case NFSSECINFONONAME_CURFH:
		vp = dp;
		break;
	default:
		nd->nd_repstat = NFSERR_INVAL;
		vput(dp);
	}
	if (nd->nd_repstat != 0)
		goto nfsmout;
	fh.nfsrvfh_len = NFSX_MYFH;
	nd->nd_repstat = nfsvno_getfh(vp, (fhandle_t *)fh.nfsrvfh_data, p);
	vput(vp);
	savflag = nd->nd_flag;
	if (nd->nd_repstat == 0) {
		/*
		 * Pretend the next op is Secinfo, so that no wrongsec
		 * test will be done.
		 */
		nfsd_fhtovp(nd, &fh, LK_SHARED, &vp, &retnes, NULL, 0,
		    NFSV4OP_SECINFO);
		if (vp != NULL)
			vput(vp);
	}
	nd->nd_flag = savflag;
	if (nd->nd_repstat != 0)
		goto nfsmout;

	/*
	 * Finally have the export flags for fh/parent, so we can create
	 * the security info.
	 */
	len = 0;
	NFSM_BUILD(sizp, uint32_t *, NFSX_UNSIGNED);

	/* If nes_numsecflavor == 0, all are allowed. */
	if (retnes.nes_numsecflavor == 0) {
		NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(RPCAUTH_UNIX);
		*tl = txdr_unsigned(RPCAUTH_GSS);
		nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
		    nfsgss_mechlist[KERBV_MECH].len);
		NFSM_BUILD(tl, uint32_t *, 3 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(GSS_KERBV_QOP);
		*tl++ = txdr_unsigned(RPCAUTHGSS_SVCNONE);
		*tl = txdr_unsigned(RPCAUTH_GSS);
		nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
		    nfsgss_mechlist[KERBV_MECH].len);
		NFSM_BUILD(tl, uint32_t *, 3 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(GSS_KERBV_QOP);
		*tl++ = txdr_unsigned(RPCAUTHGSS_SVCINTEGRITY);
		*tl = txdr_unsigned(RPCAUTH_GSS);
		nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
		    nfsgss_mechlist[KERBV_MECH].len);
		NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(GSS_KERBV_QOP);
		*tl = txdr_unsigned(RPCAUTHGSS_SVCPRIVACY);
		len = 4;
	}
	for (i = 0; i < retnes.nes_numsecflavor; i++) {
		if (retnes.nes_secflavors[i] == AUTH_SYS) {
			NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
			*tl = txdr_unsigned(RPCAUTH_UNIX);
			len++;
		} else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5) {
			NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
			*tl = txdr_unsigned(RPCAUTH_GSS);
			nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
			    nfsgss_mechlist[KERBV_MECH].len);
			NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(GSS_KERBV_QOP);
			*tl = txdr_unsigned(RPCAUTHGSS_SVCNONE);
			len++;
		} else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5I) {
			NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
			*tl = txdr_unsigned(RPCAUTH_GSS);
			nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
			    nfsgss_mechlist[KERBV_MECH].len);
			NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(GSS_KERBV_QOP);
			*tl = txdr_unsigned(RPCAUTHGSS_SVCINTEGRITY);
			len++;
		} else if (retnes.nes_secflavors[i] == RPCSEC_GSS_KRB5P) {
			NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
			*tl = txdr_unsigned(RPCAUTH_GSS);
			nfsm_strtom(nd, nfsgss_mechlist[KERBV_MECH].str,
			    nfsgss_mechlist[KERBV_MECH].len);
			NFSM_BUILD(tl, uint32_t *, 2 * NFSX_UNSIGNED);
			*tl++ = txdr_unsigned(GSS_KERBV_QOP);
			*tl = txdr_unsigned(RPCAUTHGSS_SVCPRIVACY);
			len++;
		}
	}
	*sizp = txdr_unsigned(len);

nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 set client id service
 */
int
nfsrvd_setclientid(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int i;
	int error = 0, idlen;
	struct nfsclient *clp = NULL;
#ifdef INET
	struct sockaddr_in *rin;
#endif
#ifdef INET6
	struct sockaddr_in6 *rin6;
#endif
#if defined(INET) || defined(INET6)
	u_char *ucp, *ucp2;
#endif
	u_char *verf, *addrbuf;
	nfsquad_t clientid, confirm;
	struct thread *p = curthread;

	if ((nd->nd_flag & ND_NFSV41) != 0) {
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}
	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto out;
	NFSM_DISSECT(tl, u_int32_t *, NFSX_VERF + NFSX_UNSIGNED);
	verf = (u_char *)tl;
	tl += (NFSX_VERF / NFSX_UNSIGNED);
	i = fxdr_unsigned(int, *tl);
	if (i > NFSV4_OPAQUELIMIT || i <= 0) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	idlen = i;
	if (nd->nd_flag & ND_GSS)
		i += nd->nd_princlen;
	clp = malloc(sizeof(struct nfsclient) + i, M_NFSDCLIENT, M_WAITOK |
	    M_ZERO);
	clp->lc_stateid = malloc(sizeof(struct nfsstatehead) *
	    nfsrv_statehashsize, M_NFSDCLIENT, M_WAITOK);
	NFSINITSOCKMUTEX(&clp->lc_req.nr_mtx);
	/* Allocated large enough for an AF_INET or AF_INET6 socket. */
	clp->lc_req.nr_nam = malloc(sizeof(struct sockaddr_in6), M_SONAME,
	    M_WAITOK | M_ZERO);
	clp->lc_req.nr_cred = NULL;
	NFSBCOPY(verf, clp->lc_verf, NFSX_VERF);
	clp->lc_idlen = idlen;
	error = nfsrv_mtostr(nd, clp->lc_id, idlen);
	if (error)
		goto nfsmout;
	if (nd->nd_flag & ND_GSS) {
		clp->lc_flags = LCL_GSS;
		if (nd->nd_flag & ND_GSSINTEGRITY)
			clp->lc_flags |= LCL_GSSINTEGRITY;
		else if (nd->nd_flag & ND_GSSPRIVACY)
			clp->lc_flags |= LCL_GSSPRIVACY;
	} else {
		clp->lc_flags = 0;
	}
	if ((nd->nd_flag & ND_GSS) && nd->nd_princlen > 0) {
		clp->lc_flags |= LCL_NAME;
		clp->lc_namelen = nd->nd_princlen;
		clp->lc_name = &clp->lc_id[idlen];
		NFSBCOPY(nd->nd_principal, clp->lc_name, clp->lc_namelen);
	} else {
		clp->lc_uid = nd->nd_cred->cr_uid;
		clp->lc_gid = nd->nd_cred->cr_gid;
	}

	/* If the client is using TLS, do so for the callback connection. */
	if (nd->nd_flag & ND_TLS)
		clp->lc_flags |= LCL_TLSCB;

	NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
	clp->lc_program = fxdr_unsigned(u_int32_t, *tl);
	error = nfsrv_getclientipaddr(nd, clp);
	if (error)
		goto nfsmout;
	NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
	clp->lc_callback = fxdr_unsigned(u_int32_t, *tl);

	/*
	 * nfsrv_setclient() does the actual work of adding it to the
	 * client list. If there is no error, the structure has been
	 * linked into the client list and clp should no longer be used
	 * here. When an error is returned, it has not been linked in,
	 * so it should be free'd.
	 */
	nd->nd_repstat = nfsrv_setclient(nd, &clp, &clientid, &confirm, p);
	if (nd->nd_repstat == NFSERR_CLIDINUSE) {
		/*
		 * 8 is the maximum length of the port# string.
		 */
		addrbuf = malloc(INET6_ADDRSTRLEN + 8, M_TEMP, M_WAITOK);
		switch (clp->lc_req.nr_nam->sa_family) {
#ifdef INET
		case AF_INET:
			if (clp->lc_flags & LCL_TCPCALLBACK)
				(void) nfsm_strtom(nd, "tcp", 3);
			else 
				(void) nfsm_strtom(nd, "udp", 3);
			rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
			ucp = (u_char *)&rin->sin_addr.s_addr;
			ucp2 = (u_char *)&rin->sin_port;
			sprintf(addrbuf, "%d.%d.%d.%d.%d.%d", ucp[0] & 0xff,
			    ucp[1] & 0xff, ucp[2] & 0xff, ucp[3] & 0xff,
			    ucp2[0] & 0xff, ucp2[1] & 0xff);
			break;
#endif
#ifdef INET6
		case AF_INET6:
			if (clp->lc_flags & LCL_TCPCALLBACK)
				(void) nfsm_strtom(nd, "tcp6", 4);
			else 
				(void) nfsm_strtom(nd, "udp6", 4);
			rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
			ucp = inet_ntop(AF_INET6, &rin6->sin6_addr, addrbuf,
			    INET6_ADDRSTRLEN);
			if (ucp != NULL)
				i = strlen(ucp);
			else
				i = 0;
			ucp2 = (u_char *)&rin6->sin6_port;
			sprintf(&addrbuf[i], ".%d.%d", ucp2[0] & 0xff,
			    ucp2[1] & 0xff);
			break;
#endif
		}
		(void) nfsm_strtom(nd, addrbuf, strlen(addrbuf));
		free(addrbuf, M_TEMP);
	}
	if (clp) {
		free(clp->lc_req.nr_nam, M_SONAME);
		NFSFREEMUTEX(&clp->lc_req.nr_mtx);
		free(clp->lc_stateid, M_NFSDCLIENT);
		free(clp, M_NFSDCLIENT);
	}
	if (!nd->nd_repstat) {
		NFSM_BUILD(tl, u_int32_t *, 2 * NFSX_HYPER);
		*tl++ = clientid.lval[0];
		*tl++ = clientid.lval[1];
		*tl++ = confirm.lval[0];
		*tl = confirm.lval[1];
	}

out:
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	if (clp) {
		free(clp->lc_req.nr_nam, M_SONAME);
		NFSFREEMUTEX(&clp->lc_req.nr_mtx);
		free(clp->lc_stateid, M_NFSDCLIENT);
		free(clp, M_NFSDCLIENT);
	}
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 set client id confirm service
 */
int
nfsrvd_setclientidcfrm(struct nfsrv_descript *nd,
    __unused int isdgram, __unused vnode_t vp,
    __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int error = 0;
	nfsquad_t clientid, confirm;
	struct thread *p = curthread;

	if ((nd->nd_flag & ND_NFSV41) != 0) {
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}
	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_HYPER);
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl++;
	confirm.lval[0] = *tl++;
	confirm.lval[1] = *tl;

	/*
	 * nfsrv_getclient() searches the client list for a match and
	 * returns the appropriate NFSERR status.
	 */
	nd->nd_repstat = nfsrv_getclient(clientid, (CLOPS_CONFIRM|CLOPS_RENEW),
	    NULL, NULL, confirm, 0, nd, p);
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 verify service
 */
int
nfsrvd_verify(struct nfsrv_descript *nd, int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	int error = 0, ret, fhsize = NFSX_MYFH;
	struct nfsvattr nva;
	struct statfs *sf;
	struct nfsfsinfo fs;
	fhandle_t fh;
	struct thread *p = curthread;

	sf = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
	nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1, NULL);
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsvno_statfs(vp, sf);
	if (!nd->nd_repstat)
		nd->nd_repstat = nfsvno_getfh(vp, &fh, p);
	if (!nd->nd_repstat) {
		nfsvno_getfs(&fs, isdgram);
		error = nfsv4_loadattr(nd, vp, &nva, NULL, &fh, fhsize, NULL,
		    sf, NULL, &fs, NULL, 1, &ret, NULL, NULL, p, nd->nd_cred);
		if (!error) {
			if (nd->nd_procnum == NFSV4OP_NVERIFY) {
				if (ret == 0)
					nd->nd_repstat = NFSERR_SAME;
				else if (ret != NFSERR_NOTSAME)
					nd->nd_repstat = ret;
			} else if (ret)
				nd->nd_repstat = ret;
		}
	}
	vput(vp);
	free(sf, M_STATFS);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs openattr rpc
 */
int
nfsrvd_openattr(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t dp, __unused vnode_t *vpp, __unused fhandle_t *fhp,
    __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	int error = 0, createdir __unused;

	NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
	createdir = fxdr_unsigned(int, *tl);
	nd->nd_repstat = NFSERR_NOTSUPP;
nfsmout:
	vrele(dp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 release lock owner service
 */
int
nfsrvd_releaselckown(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	u_int32_t *tl;
	struct nfsstate *stp = NULL;
	int error = 0, len;
	nfsquad_t clientid;
	struct thread *p = curthread;

	if ((nd->nd_flag & ND_NFSV41) != 0) {
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}
	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
	len = fxdr_unsigned(int, *(tl + 2));
	if (len <= 0 || len > NFSV4_OPAQUELIMIT) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	stp = malloc(sizeof (struct nfsstate) + len,
	    M_NFSDSTATE, M_WAITOK);
	stp->ls_ownerlen = len;
	stp->ls_op = NULL;
	stp->ls_flags = NFSLCK_RELEASE;
	stp->ls_uid = nd->nd_cred->cr_uid;
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK14 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	error = nfsrv_mtostr(nd, stp->ls_owner, len);
	if (error)
		goto nfsmout;
	nd->nd_repstat = nfsrv_releaselckown(stp, clientid, p);
	free(stp, M_NFSDSTATE);

	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	if (stp)
		free(stp, M_NFSDSTATE);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 exchange_id service
 */
int
nfsrvd_exchangeid(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	int error = 0, i, idlen;
	struct nfsclient *clp = NULL;
	nfsquad_t clientid, confirm;
	uint8_t *verf;
	uint32_t sp4type, v41flags;
	struct timespec verstime;
	nfsopbit_t mustops, allowops;
#ifdef INET
	struct sockaddr_in *sin, *rin;
#endif
#ifdef INET6
	struct sockaddr_in6 *sin6, *rin6;
#endif
	struct thread *p = curthread;
	char *s;

	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, u_int32_t *, NFSX_VERF + NFSX_UNSIGNED);
	verf = (uint8_t *)tl;
	tl += (NFSX_VERF / NFSX_UNSIGNED);
	i = fxdr_unsigned(int, *tl);
	if (i > NFSV4_OPAQUELIMIT || i <= 0) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	idlen = i;
	if (nd->nd_flag & ND_GSS)
		i += nd->nd_princlen;
	clp = malloc(sizeof(struct nfsclient) + i, M_NFSDCLIENT, M_WAITOK |
	    M_ZERO);
	clp->lc_stateid = malloc(sizeof(struct nfsstatehead) *
	    nfsrv_statehashsize, M_NFSDCLIENT, M_WAITOK);
	NFSINITSOCKMUTEX(&clp->lc_req.nr_mtx);
	/* Allocated large enough for an AF_INET or AF_INET6 socket. */
	clp->lc_req.nr_nam = malloc(sizeof(struct sockaddr_in6), M_SONAME,
	    M_WAITOK | M_ZERO);
	switch (nd->nd_nam->sa_family) {
#ifdef INET
	case AF_INET:
		rin = (struct sockaddr_in *)clp->lc_req.nr_nam;
		sin = (struct sockaddr_in *)nd->nd_nam;
		rin->sin_family = AF_INET;
		rin->sin_len = sizeof(struct sockaddr_in);
		rin->sin_port = 0;
		rin->sin_addr.s_addr = sin->sin_addr.s_addr;
		break;
#endif
#ifdef INET6
	case AF_INET6:
		rin6 = (struct sockaddr_in6 *)clp->lc_req.nr_nam;
		sin6 = (struct sockaddr_in6 *)nd->nd_nam;
		rin6->sin6_family = AF_INET6;
		rin6->sin6_len = sizeof(struct sockaddr_in6);
		rin6->sin6_port = 0;
		rin6->sin6_addr = sin6->sin6_addr;
		break;
#endif
	}
	clp->lc_req.nr_cred = NULL;
	NFSBCOPY(verf, clp->lc_verf, NFSX_VERF);
	clp->lc_idlen = idlen;
	error = nfsrv_mtostr(nd, clp->lc_id, idlen);
	if (error != 0)
		goto nfsmout;
	if ((nd->nd_flag & ND_GSS) != 0) {
		clp->lc_flags = LCL_GSS | LCL_NFSV41;
		if ((nd->nd_flag & ND_GSSINTEGRITY) != 0)
			clp->lc_flags |= LCL_GSSINTEGRITY;
		else if ((nd->nd_flag & ND_GSSPRIVACY) != 0)
			clp->lc_flags |= LCL_GSSPRIVACY;
	} else
		clp->lc_flags = LCL_NFSV41;
	if ((nd->nd_flag & ND_NFSV42) != 0)
		clp->lc_flags |= LCL_NFSV42;
	if ((nd->nd_flag & ND_GSS) != 0 && nd->nd_princlen > 0) {
		clp->lc_flags |= LCL_NAME;
		clp->lc_namelen = nd->nd_princlen;
		clp->lc_name = &clp->lc_id[idlen];
		NFSBCOPY(nd->nd_principal, clp->lc_name, clp->lc_namelen);
	} else {
		clp->lc_uid = nd->nd_cred->cr_uid;
		clp->lc_gid = nd->nd_cred->cr_gid;
	}
	NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
	v41flags = fxdr_unsigned(uint32_t, *tl++);
	if ((v41flags & ~(NFSV4EXCH_SUPPMOVEDREFER | NFSV4EXCH_SUPPMOVEDMIGR |
	    NFSV4EXCH_BINDPRINCSTATEID | NFSV4EXCH_MASKPNFS |
	    NFSV4EXCH_UPDCONFIRMEDRECA)) != 0) {
		nd->nd_repstat = NFSERR_INVAL;
		goto nfsmout;
	}
	if ((v41flags & NFSV4EXCH_UPDCONFIRMEDRECA) != 0)
		confirm.lval[1] = 1;
	else
		confirm.lval[1] = 0;
	if (nfsrv_devidcnt == 0)
		v41flags = NFSV4EXCH_USENONPNFS | NFSV4EXCH_USEPNFSDS;
 	else
 		v41flags = NFSV4EXCH_USEPNFSMDS;
	sp4type = fxdr_unsigned(uint32_t, *tl);
	if (sp4type == NFSV4EXCH_SP4MACHCRED) {
		if ((nd->nd_flag & (ND_GSSINTEGRITY | ND_GSSPRIVACY)) == 0 ||
		    nd->nd_princlen == 0)
			nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK);
		if (nd->nd_repstat == 0)
			nd->nd_repstat = nfsrv_getopbits(nd, &mustops, NULL);
		if (nd->nd_repstat == 0)
			nd->nd_repstat = nfsrv_getopbits(nd, &allowops, NULL);
		if (nd->nd_repstat != 0)
			goto nfsmout;
		NFSOPBIT_CLRNOTMUST(&mustops);
		NFSSET_OPBIT(&clp->lc_mustops, &mustops);
		NFSOPBIT_CLRNOTALLOWED(&allowops);
		NFSSET_OPBIT(&clp->lc_allowops, &allowops);
		clp->lc_flags |= LCL_MACHCRED;
	} else if (sp4type != NFSV4EXCH_SP4NONE) {
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}

	/*
	 * nfsrv_setclient() does the actual work of adding it to the
	 * client list. If there is no error, the structure has been
	 * linked into the client list and clp should no longer be used
	 * here. When an error is returned, it has not been linked in,
	 * so it should be free'd.
	 */
	nd->nd_repstat = nfsrv_setclient(nd, &clp, &clientid, &confirm, p);
	if (clp != NULL) {
		free(clp->lc_req.nr_nam, M_SONAME);
		NFSFREEMUTEX(&clp->lc_req.nr_mtx);
		free(clp->lc_stateid, M_NFSDCLIENT);
		free(clp, M_NFSDCLIENT);
	}
	if (nd->nd_repstat == 0) {
		if (confirm.lval[1] != 0)
			v41flags |= NFSV4EXCH_CONFIRMEDR;
		NFSM_BUILD(tl, uint32_t *, NFSX_HYPER + 3 * NFSX_UNSIGNED);
		*tl++ = clientid.lval[0];			/* ClientID */
		*tl++ = clientid.lval[1];
		*tl++ = txdr_unsigned(confirm.lval[0]);		/* SequenceID */
		*tl++ = txdr_unsigned(v41flags);		/* Exch flags */
		*tl = txdr_unsigned(sp4type);			/* No SSV */
		if (sp4type == NFSV4EXCH_SP4MACHCRED) {
			nfsrv_putopbit(nd, &mustops);
			nfsrv_putopbit(nd, &allowops);
		}
		NFSM_BUILD(tl, uint32_t *, NFSX_HYPER);
		txdr_hyper(nfsrv_owner_minor, tl);	/* Owner Minor */
		if (nfsrv_owner_major[0] != 0)
			s = nfsrv_owner_major;
		else
			s = nd->nd_cred->cr_prison->pr_hostuuid;
		nfsm_strtom(nd, s, strlen(s));		/* Owner Major */
		if (nfsrv_scope[0] != 0)
			s = nfsrv_scope;
		else
			s = nd->nd_cred->cr_prison->pr_hostuuid;
		nfsm_strtom(nd, s, strlen(s)	);		/* Scope */
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
		*tl = txdr_unsigned(1);
		(void)nfsm_strtom(nd, "freebsd.org", strlen("freebsd.org"));
		(void)nfsm_strtom(nd, version, strlen(version));
		NFSM_BUILD(tl, uint32_t *, NFSX_V4TIME);
		verstime.tv_sec = 1293840000;		/* Jan 1, 2011 */
		verstime.tv_nsec = 0;
		txdr_nfsv4time(&verstime, tl);
	}
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	if (clp != NULL) {
		free(clp->lc_req.nr_nam, M_SONAME);
		NFSFREEMUTEX(&clp->lc_req.nr_mtx);
		free(clp->lc_stateid, M_NFSDCLIENT);
		free(clp, M_NFSDCLIENT);
	}
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 create session service
 */
int
nfsrvd_createsession(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	int error = 0;
	nfsquad_t clientid, confirm;
	struct nfsdsession *sep = NULL;
	uint32_t rdmacnt;
	struct thread *p = curthread;
	static bool do_printf = true;

	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	sep = (struct nfsdsession *)malloc(sizeof(struct nfsdsession),
	    M_NFSDSESSION, M_WAITOK | M_ZERO);
	sep->sess_refcnt = 1;
	mtx_init(&sep->sess_cbsess.nfsess_mtx, "nfscbsession", NULL, MTX_DEF);
	NFSM_DISSECT(tl, uint32_t *, NFSX_HYPER + 2 * NFSX_UNSIGNED);
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl++;
	confirm.lval[0] = fxdr_unsigned(uint32_t, *tl++);
	sep->sess_crflags = fxdr_unsigned(uint32_t, *tl);
	/* Persistent sessions and RDMA are not supported. */
	sep->sess_crflags &= NFSV4CRSESS_CONNBACKCHAN;

	/* Fore channel attributes. */
	NFSM_DISSECT(tl, uint32_t *, 7 * NFSX_UNSIGNED);
	tl++;					/* Header pad always 0. */
	sep->sess_maxreq = fxdr_unsigned(uint32_t, *tl++);
	if (sep->sess_maxreq > sb_max_adj - NFS_MAXXDR) {
		sep->sess_maxreq = sb_max_adj - NFS_MAXXDR;
		if (do_printf)
			printf("Consider increasing kern.ipc.maxsockbuf\n");
		do_printf = false;
	}
	sep->sess_maxresp = fxdr_unsigned(uint32_t, *tl++);
	if (sep->sess_maxresp > sb_max_adj - NFS_MAXXDR) {
		sep->sess_maxresp = sb_max_adj - NFS_MAXXDR;
		if (do_printf)
			printf("Consider increasing kern.ipc.maxsockbuf\n");
		do_printf = false;
	}
	sep->sess_maxrespcached = fxdr_unsigned(uint32_t, *tl++);
	sep->sess_maxops = fxdr_unsigned(uint32_t, *tl++);
	sep->sess_maxslots = fxdr_unsigned(uint32_t, *tl++);
	if (sep->sess_maxslots > NFSV4_SLOTS)
		sep->sess_maxslots = NFSV4_SLOTS;
	rdmacnt = fxdr_unsigned(uint32_t, *tl);
	if (rdmacnt > 1) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	} else if (rdmacnt == 1)
		NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);

	/* Back channel attributes. */
	NFSM_DISSECT(tl, uint32_t *, 7 * NFSX_UNSIGNED);
	tl++;					/* Header pad always 0. */
	sep->sess_cbmaxreq = fxdr_unsigned(uint32_t, *tl++);
	sep->sess_cbmaxresp = fxdr_unsigned(uint32_t, *tl++);
	sep->sess_cbmaxrespcached = fxdr_unsigned(uint32_t, *tl++);
	sep->sess_cbmaxops = fxdr_unsigned(uint32_t, *tl++);
	sep->sess_cbsess.nfsess_foreslots = fxdr_unsigned(uint32_t, *tl++);
	rdmacnt = fxdr_unsigned(uint32_t, *tl);
	if (rdmacnt > 1) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	} else if (rdmacnt == 1)
		NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);

	NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	sep->sess_cbprogram = fxdr_unsigned(uint32_t, *tl);

	/*
	 * nfsrv_getclient() searches the client list for a match and
	 * returns the appropriate NFSERR status.
	 */
	nd->nd_repstat = nfsrv_getclient(clientid, CLOPS_CONFIRM | CLOPS_RENEW,
	    NULL, sep, confirm, sep->sess_cbprogram, nd, p);
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID);
		NFSBCOPY(sep->sess_sessionid, tl, NFSX_V4SESSIONID);
		NFSM_BUILD(tl, uint32_t *, 18 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(confirm.lval[0]);	/* sequenceid */
		*tl++ = txdr_unsigned(sep->sess_crflags);

		/* Fore channel attributes. */
		*tl++ = 0;
		*tl++ = txdr_unsigned(sep->sess_maxreq);
		*tl++ = txdr_unsigned(sep->sess_maxresp);
		*tl++ = txdr_unsigned(sep->sess_maxrespcached);
		*tl++ = txdr_unsigned(sep->sess_maxops);
		*tl++ = txdr_unsigned(sep->sess_maxslots);
		*tl++ = txdr_unsigned(1);
		*tl++ = txdr_unsigned(0);			/* No RDMA. */

		/* Back channel attributes. */
		*tl++ = 0;
		*tl++ = txdr_unsigned(sep->sess_cbmaxreq);
		*tl++ = txdr_unsigned(sep->sess_cbmaxresp);
		*tl++ = txdr_unsigned(sep->sess_cbmaxrespcached);
		*tl++ = txdr_unsigned(sep->sess_cbmaxops);
		*tl++ = txdr_unsigned(sep->sess_cbsess.nfsess_foreslots);
		*tl++ = txdr_unsigned(1);
		*tl = txdr_unsigned(0);			/* No RDMA. */
	}
nfsmout:
	if (nd->nd_repstat != 0 && sep != NULL)
		free(sep, M_NFSDSESSION);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 sequence service
 */
int
nfsrvd_sequence(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	uint32_t highest_slotid, sequenceid, sflags, target_highest_slotid;
	int cache_this, error = 0;
	struct thread *p = curthread;

	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID);
	NFSBCOPY(tl, nd->nd_sessionid, NFSX_V4SESSIONID);
	NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
	sequenceid = fxdr_unsigned(uint32_t, *tl++);
	nd->nd_slotid = fxdr_unsigned(uint32_t, *tl++);
	highest_slotid = fxdr_unsigned(uint32_t, *tl++);
	if (*tl == newnfs_true)
		cache_this = 1;
	else
		cache_this = 0;
	nd->nd_repstat = nfsrv_checksequence(nd, sequenceid, &highest_slotid,
	    &target_highest_slotid, cache_this, &sflags, p);
	if (nd->nd_repstat != NFSERR_BADSLOT)
		nd->nd_flag |= ND_HASSEQUENCE;
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID);
		NFSBCOPY(nd->nd_sessionid, tl, NFSX_V4SESSIONID);
		NFSM_BUILD(tl, uint32_t *, 5 * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(sequenceid);
		*tl++ = txdr_unsigned(nd->nd_slotid);
		*tl++ = txdr_unsigned(highest_slotid);
		*tl++ = txdr_unsigned(target_highest_slotid);
		*tl = txdr_unsigned(sflags);
	}
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 reclaim complete service
 */
int
nfsrvd_reclaimcomplete(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	int error = 0, onefs;

	NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	/*
	 * I believe that a ReclaimComplete with rca_one_fs == TRUE is only
	 * to be used after a file system has been transferred to a different
	 * file server.  However, RFC5661 is somewhat vague w.r.t. this and
	 * the ESXi 6.7 client does both a ReclaimComplete with rca_one_fs
	 * == TRUE and one with ReclaimComplete with rca_one_fs == FALSE.
	 * Therefore, just ignore the rca_one_fs == TRUE operation and return
	 * NFS_OK without doing anything.
	 */
	onefs = 0;
	if (*tl == newnfs_true)
		onefs = 1;
	nd->nd_repstat = nfsrv_checkreclaimcomplete(nd, onefs);
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 destroy clientid service
 */
int
nfsrvd_destroyclientid(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsquad_t clientid;
	int error = 0;
	struct thread *p = curthread;

	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED);
	clientid.lval[0] = *tl++;
	clientid.lval[1] = *tl;
	nd->nd_repstat = nfsrv_destroyclient(nd, clientid, p);
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 bind connection to session service
 */
int
nfsrvd_bindconnsess(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	uint8_t sessid[NFSX_V4SESSIONID];
	int error = 0, foreaft;

	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, uint32_t *, NFSX_V4SESSIONID + 2 * NFSX_UNSIGNED);
	NFSBCOPY(tl, sessid, NFSX_V4SESSIONID);
	tl += (NFSX_V4SESSIONID / NFSX_UNSIGNED);
	foreaft = fxdr_unsigned(int, *tl++);
	if (*tl == newnfs_true) {
		/* RDMA is not supported. */
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}

	nd->nd_repstat = nfsrv_bindconnsess(nd, sessid, &foreaft);
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, NFSX_V4SESSIONID + 2 *
		    NFSX_UNSIGNED);
		NFSBCOPY(sessid, tl, NFSX_V4SESSIONID);
		tl += (NFSX_V4SESSIONID / NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(foreaft);
		*tl = newnfs_false;
	}
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 destroy session service
 */
int
nfsrvd_destroysession(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint8_t *cp, sessid[NFSX_V4SESSIONID];
	int error = 0;

	if ((nd->nd_repstat = nfsd_checkrootexp(nd)) != 0)
		goto nfsmout;
	NFSM_DISSECT(cp, uint8_t *, NFSX_V4SESSIONID);
	NFSBCOPY(cp, sessid, NFSX_V4SESSIONID);
	nd->nd_repstat = nfsrv_destroysession(nd, sessid);
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 free stateid service
 */
int
nfsrvd_freestateid(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsv4stateid_t stateid;
	int error = 0;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, uint32_t *, NFSX_STATEID);
	stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);

	/*
	 * For the special stateid of other all 0s and seqid == 1, set the
	 * stateid to the current stateid, if it is set.
	 */
	if (stateid.seqid == 1 && stateid.other[0] == 0 &&
	    stateid.other[1] == 0 && stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0) {
			stateid = nd->nd_curstateid;
			stateid.seqid = 0;
		} else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	nd->nd_repstat = nfsrv_freestateid(nd, &stateid, p);

	/* If the current stateid has been free'd, unset it. */
	if (nd->nd_repstat == 0 && (nd->nd_flag & ND_CURSTATEID) != 0 &&
	    stateid.other[0] == nd->nd_curstateid.other[0] &&
	    stateid.other[1] == nd->nd_curstateid.other[1] &&
	    stateid.other[2] == nd->nd_curstateid.other[2])
		nd->nd_flag &= ~ND_CURSTATEID;
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 layoutget service
 */
int
nfsrvd_layoutget(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsv4stateid_t stateid;
	int error = 0, layoutlen, layouttype, iomode, maxcnt, retonclose;
	uint64_t offset, len, minlen;
	char *layp;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED + 3 * NFSX_HYPER +
	    NFSX_STATEID);
	tl++;		/* Signal layout available. Ignore for now. */
	layouttype = fxdr_unsigned(int, *tl++);
	iomode = fxdr_unsigned(int, *tl++);
	offset = fxdr_hyper(tl); tl += 2;
	len = fxdr_hyper(tl); tl += 2;
	minlen = fxdr_hyper(tl); tl += 2;
	stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
	maxcnt = fxdr_unsigned(int, *tl);
	NFSD_DEBUG(4, "layoutget ltyp=%d iom=%d off=%ju len=%ju mlen=%ju\n",
	    layouttype, iomode, (uintmax_t)offset, (uintmax_t)len,
	    (uintmax_t)minlen);
	if (len < minlen ||
	    (minlen != UINT64_MAX && offset + minlen < offset) ||
	    (len != UINT64_MAX && offset + len < offset)) {
		nd->nd_repstat = NFSERR_INVAL;
		goto nfsmout;
	}

	/*
	 * For the special stateid of other all 0s and seqid == 1, set the
	 * stateid to the current stateid, if it is set.
	 */
	if (stateid.seqid == 1 && stateid.other[0] == 0 &&
	    stateid.other[1] == 0 && stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0) {
			stateid = nd->nd_curstateid;
			stateid.seqid = 0;
		} else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	layp = NULL;
	if (layouttype == NFSLAYOUT_NFSV4_1_FILES && nfsrv_maxpnfsmirror == 1)
		layp = malloc(NFSX_V4FILELAYOUT, M_TEMP, M_WAITOK);
	else if (layouttype == NFSLAYOUT_FLEXFILE)
		layp = malloc(NFSX_V4FLEXLAYOUT(nfsrv_maxpnfsmirror), M_TEMP,
		    M_WAITOK);
	else
		nd->nd_repstat = NFSERR_UNKNLAYOUTTYPE;
	if (layp != NULL)
		nd->nd_repstat = nfsrv_layoutget(nd, vp, exp, layouttype,
		    &iomode, &offset, &len, minlen, &stateid, maxcnt,
		    &retonclose, &layoutlen, layp, nd->nd_cred, p);
	NFSD_DEBUG(4, "nfsrv_layoutget stat=%u layoutlen=%d\n", nd->nd_repstat,
	    layoutlen);
	if (nd->nd_repstat == 0) {
		/* For NFSv4.1, set the Current StateID. */
		if ((nd->nd_flag & ND_NFSV41) != 0) {
			nd->nd_curstateid = stateid;
			nd->nd_flag |= ND_CURSTATEID;
		}
		NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED + NFSX_STATEID +
		    2 * NFSX_HYPER);
		*tl++ = txdr_unsigned(retonclose);
		*tl++ = txdr_unsigned(stateid.seqid);
		NFSBCOPY(stateid.other, tl, NFSX_STATEIDOTHER);
		tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(1);	/* Only returns one layout. */
		txdr_hyper(offset, tl); tl += 2;
		txdr_hyper(len, tl); tl += 2;
		*tl++ = txdr_unsigned(iomode);
		*tl = txdr_unsigned(layouttype);
		nfsm_strtom(nd, layp, layoutlen);
	} else if (nd->nd_repstat == NFSERR_LAYOUTTRYLATER) {
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
		*tl = newnfs_false;
	}
	free(layp, M_TEMP);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 layoutcommit service
 */
int
nfsrvd_layoutcommit(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsv4stateid_t stateid;
	int error = 0, hasnewoff, hasnewmtime, layouttype, maxcnt, reclaim;
	int hasnewsize;
	uint64_t offset, len, newoff = 0, newsize;
	struct timespec newmtime;
	char *layp;
	struct thread *p = curthread;

	layp = NULL;
	NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + 2 * NFSX_HYPER +
	    NFSX_STATEID);
	offset = fxdr_hyper(tl); tl += 2;
	len = fxdr_hyper(tl); tl += 2;
	reclaim = fxdr_unsigned(int, *tl++);
	stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
	/*
	 * For the special stateid of other all 0s and seqid == 1, set the
	 * stateid to the current stateid, if it is set.
	 */
	if (stateid.seqid == 1 && stateid.other[0] == 0 &&
	    stateid.other[1] == 0 && stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0) {
			stateid = nd->nd_curstateid;
			stateid.seqid = 0;
		} else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	hasnewoff = fxdr_unsigned(int, *tl);
	if (hasnewoff != 0) {
		NFSM_DISSECT(tl, uint32_t *, NFSX_HYPER + NFSX_UNSIGNED);
		newoff = fxdr_hyper(tl); tl += 2;
	} else
		NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	hasnewmtime = fxdr_unsigned(int, *tl);
	if (hasnewmtime != 0) {
		NFSM_DISSECT(tl, uint32_t *, NFSX_V4TIME + 2 * NFSX_UNSIGNED);
		fxdr_nfsv4time(tl, &newmtime);
		tl += (NFSX_V4TIME / NFSX_UNSIGNED);
	} else
		NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED);
	layouttype = fxdr_unsigned(int, *tl++);
	maxcnt = fxdr_unsigned(int, *tl);
	if (maxcnt > 0) {
		layp = malloc(maxcnt + 1, M_TEMP, M_WAITOK);
		error = nfsrv_mtostr(nd, layp, maxcnt);
		if (error != 0)
			goto nfsmout;
	}
	nd->nd_repstat = nfsrv_layoutcommit(nd, vp, layouttype, hasnewoff,
	    newoff, offset, len, hasnewmtime, &newmtime, reclaim, &stateid,
	    maxcnt, layp, &hasnewsize, &newsize, nd->nd_cred, p);
	NFSD_DEBUG(4, "nfsrv_layoutcommit stat=%u\n", nd->nd_repstat);
	if (nd->nd_repstat == 0) {
		if (hasnewsize != 0) {
			NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED + NFSX_HYPER);
			*tl++ = newnfs_true;
			txdr_hyper(newsize, tl);
		} else {
			NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
			*tl = newnfs_false;
		}
	}
nfsmout:
	free(layp, M_TEMP);
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 layoutreturn service
 */
int
nfsrvd_layoutreturn(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl, *layp;
	nfsv4stateid_t stateid;
	int error = 0, fnd, kind, layouttype, iomode, maxcnt, reclaim;
	uint64_t offset, len;
	struct thread *p = curthread;

	layp = NULL;
	NFSM_DISSECT(tl, uint32_t *, 4 * NFSX_UNSIGNED);
	reclaim = *tl++;
	layouttype = fxdr_unsigned(int, *tl++);
	iomode = fxdr_unsigned(int, *tl++);
	kind = fxdr_unsigned(int, *tl);
	NFSD_DEBUG(4, "layoutreturn recl=%d ltyp=%d iom=%d kind=%d\n", reclaim,
	    layouttype, iomode, kind);
	if (kind == NFSV4LAYOUTRET_FILE) {
		NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_STATEID +
		    NFSX_UNSIGNED);
		offset = fxdr_hyper(tl); tl += 2;
		len = fxdr_hyper(tl); tl += 2;
		stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
		NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
		tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);

		/*
		 * For the special stateid of other all 0s and seqid == 1, set
		 * the stateid to the current stateid, if it is set.
		 */
		if (stateid.seqid == 1 && stateid.other[0] == 0 &&
		    stateid.other[1] == 0 && stateid.other[2] == 0) {
			if ((nd->nd_flag & ND_CURSTATEID) != 0) {
				stateid = nd->nd_curstateid;
				stateid.seqid = 0;
			} else {
				nd->nd_repstat = NFSERR_BADSTATEID;
				goto nfsmout;
			}
		}

		maxcnt = fxdr_unsigned(int, *tl);
		/*
		 * There is no fixed upper bound defined in the RFCs,
		 * but 128Kbytes should be more than sufficient.
		 */
		if (maxcnt < 0 || maxcnt > 131072)
			maxcnt = 0;
		if (maxcnt > 0) {
			layp = malloc(maxcnt + 1, M_TEMP, M_WAITOK);
			error = nfsrv_mtostr(nd, (char *)layp, maxcnt);
			if (error != 0)
				goto nfsmout;
		}
	} else {
		if (reclaim == newnfs_true) {
			nd->nd_repstat = NFSERR_INVAL;
			goto nfsmout;
		}
		offset = len = 0;
		maxcnt = 0;
	}
	nd->nd_repstat = nfsrv_layoutreturn(nd, vp, layouttype, iomode,
	    offset, len, reclaim, kind, &stateid, maxcnt, layp, &fnd,
	    nd->nd_cred, p);
	NFSD_DEBUG(4, "nfsrv_layoutreturn stat=%u fnd=%d\n", nd->nd_repstat,
	    fnd);
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
		if (fnd != 0) {
			*tl = newnfs_true;
			NFSM_BUILD(tl, uint32_t *, NFSX_STATEID);
			*tl++ = txdr_unsigned(stateid.seqid);
			NFSBCOPY(stateid.other, tl, NFSX_STATEIDOTHER);
		} else
			*tl = newnfs_false;
	}
nfsmout:
	free(layp, M_TEMP);
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 layout error service
 */
int
nfsrvd_layouterror(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsv4stateid_t stateid;
	int cnt, error = 0, i, stat;
	int opnum __unused;
	char devid[NFSX_V4DEVICEID];
	uint64_t offset, len;

	NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_STATEID +
	    NFSX_UNSIGNED);
	offset = fxdr_hyper(tl); tl += 2;
	len = fxdr_hyper(tl); tl += 2;
	stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
	cnt = fxdr_unsigned(int, *tl);
	NFSD_DEBUG(4, "layouterror off=%ju len=%ju cnt=%d\n", (uintmax_t)offset,
	    (uintmax_t)len, cnt);
	/*
	 * For the special stateid of other all 0s and seqid == 1, set
	 * the stateid to the current stateid, if it is set.
	 */
	if (stateid.seqid == 1 && stateid.other[0] == 0 &&
	    stateid.other[1] == 0 && stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0) {
			stateid = nd->nd_curstateid;
			stateid.seqid = 0;
		} else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	/*
	 * Ignore offset, len and stateid for now.
	 */
	for (i = 0; i < cnt; i++) {
		NFSM_DISSECT(tl, uint32_t *, NFSX_V4DEVICEID + 2 *
		    NFSX_UNSIGNED);
		NFSBCOPY(tl, devid, NFSX_V4DEVICEID);
		tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
		stat = fxdr_unsigned(int, *tl++);
		opnum = fxdr_unsigned(int, *tl);
		NFSD_DEBUG(4, "nfsrvd_layouterr op=%d stat=%d\n", opnum, stat);
		/*
		 * Except for NFSERR_ACCES, NFSERR_STALE and NFSERR_NOSPC
		 * errors, disable the mirror.
		 */
		if (stat != NFSERR_ACCES && stat != NFSERR_STALE &&
		    stat != NFSERR_NOSPC)
			nfsrv_delds(devid, curthread);

		/* For NFSERR_NOSPC, mark all deviceids and layouts. */
		if (stat == NFSERR_NOSPC)
			nfsrv_marknospc(devid, true);
	}
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 layout stats service
 */
int
nfsrvd_layoutstats(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsv4stateid_t stateid;
	int cnt, error = 0;
	int layouttype __unused;
	char devid[NFSX_V4DEVICEID] __unused;
	uint64_t offset __unused, len __unused, readcount __unused;
	uint64_t readbytes __unused, writecount __unused, writebytes __unused;

	NFSM_DISSECT(tl, uint32_t *, 6 * NFSX_HYPER + NFSX_STATEID +
	    NFSX_V4DEVICEID + 2 * NFSX_UNSIGNED);
	offset = fxdr_hyper(tl); tl += 2;
	len = fxdr_hyper(tl); tl += 2;
	stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
	readcount = fxdr_hyper(tl); tl += 2;
	readbytes = fxdr_hyper(tl); tl += 2;
	writecount = fxdr_hyper(tl); tl += 2;
	writebytes = fxdr_hyper(tl); tl += 2;
	NFSBCOPY(tl, devid, NFSX_V4DEVICEID);
	tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
	layouttype = fxdr_unsigned(int, *tl++);
	cnt = fxdr_unsigned(int, *tl);
	error = nfsm_advance(nd, NFSM_RNDUP(cnt), -1);
	if (error != 0)
		goto nfsmout;
	NFSD_DEBUG(4, "layoutstats cnt=%d\n", cnt);
	/*
	 * For the special stateid of other all 0s and seqid == 1, set
	 * the stateid to the current stateid, if it is set.
	 */
	if (stateid.seqid == 1 && stateid.other[0] == 0 &&
	    stateid.other[1] == 0 && stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0) {
			stateid = nd->nd_curstateid;
			stateid.seqid = 0;
		} else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	/*
	 * No use for the stats for now.
	 */
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 io_advise service
 */
int
nfsrvd_ioadvise(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsv4stateid_t stateid;
	nfsattrbit_t hints;
	int error = 0, ret;
	off_t offset, len;

	NFSM_DISSECT(tl, uint32_t *, NFSX_STATEID + 2 * NFSX_HYPER);
	stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	NFSBCOPY(tl, stateid.other, NFSX_STATEIDOTHER);
	tl += (NFSX_STATEIDOTHER / NFSX_UNSIGNED);
	offset = fxdr_hyper(tl); tl += 2;
	len = fxdr_hyper(tl);
	error = nfsrv_getattrbits(nd, &hints, NULL, NULL);
	if (error != 0)
		goto nfsmout;
	/*
	 * For the special stateid of other all 0s and seqid == 1, set
	 * the stateid to the current stateid, if it is set.
	 */
	if (stateid.seqid == 1 && stateid.other[0] == 0 &&
	    stateid.other[1] == 0 && stateid.other[2] == 0) {
		if ((nd->nd_flag & ND_CURSTATEID) != 0) {
			stateid = nd->nd_curstateid;
			stateid.seqid = 0;
		} else {
			nd->nd_repstat = NFSERR_BADSTATEID;
			goto nfsmout;
		}
	}

	if (offset < 0) {
		nd->nd_repstat = NFSERR_INVAL;
		goto nfsmout;
	}
	if (len < 0)
		len = 0;
	if (vp->v_type != VREG) {
		if (vp->v_type == VDIR)
			nd->nd_repstat = NFSERR_ISDIR;
		else
			nd->nd_repstat = NFSERR_WRONGTYPE;
		goto nfsmout;
	}

	/*
	 * For now, we can only handle WILLNEED and DONTNEED and don't use
	 * the stateid.
	 */
	if ((NFSISSET_ATTRBIT(&hints, NFSV4IOHINT_WILLNEED) &&
	    !NFSISSET_ATTRBIT(&hints, NFSV4IOHINT_DONTNEED)) ||
	    (NFSISSET_ATTRBIT(&hints, NFSV4IOHINT_DONTNEED) &&
	    !NFSISSET_ATTRBIT(&hints, NFSV4IOHINT_WILLNEED))) {
		NFSVOPUNLOCK(vp);
		if (NFSISSET_ATTRBIT(&hints, NFSV4IOHINT_WILLNEED)) {
			ret = VOP_ADVISE(vp, offset, len, POSIX_FADV_WILLNEED);
			NFSZERO_ATTRBIT(&hints);
			if (ret == 0)
				NFSSETBIT_ATTRBIT(&hints, NFSV4IOHINT_WILLNEED);
			else
				NFSSETBIT_ATTRBIT(&hints, NFSV4IOHINT_NORMAL);
		} else {
			ret = VOP_ADVISE(vp, offset, len, POSIX_FADV_DONTNEED);
			NFSZERO_ATTRBIT(&hints);
			if (ret == 0)
				NFSSETBIT_ATTRBIT(&hints, NFSV4IOHINT_DONTNEED);
			else
				NFSSETBIT_ATTRBIT(&hints, NFSV4IOHINT_NORMAL);
		}
		vrele(vp);
	} else {
		NFSZERO_ATTRBIT(&hints);
		NFSSETBIT_ATTRBIT(&hints, NFSV4IOHINT_NORMAL);
		vput(vp);
	}
	nfsrv_putattrbit(nd, &hints);
	NFSEXITCODE2(error, nd);
	return (error);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 getdeviceinfo service
 */
int
nfsrvd_getdevinfo(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl, maxcnt, notify[NFSV4_NOTIFYBITMAP];
	int cnt, devaddrlen, error = 0, i, layouttype;
	char devid[NFSX_V4DEVICEID], *devaddr;
	time_t dev_time;

	NFSM_DISSECT(tl, uint32_t *, 3 * NFSX_UNSIGNED + NFSX_V4DEVICEID);
	NFSBCOPY(tl, devid, NFSX_V4DEVICEID);
	tl += (NFSX_V4DEVICEID / NFSX_UNSIGNED);
	layouttype = fxdr_unsigned(int, *tl++);
	maxcnt = fxdr_unsigned(uint32_t, *tl++);
	cnt = fxdr_unsigned(int, *tl);
	NFSD_DEBUG(4, "getdevinfo ltyp=%d maxcnt=%u bitcnt=%d\n", layouttype,
	    maxcnt, cnt);
	if (cnt > NFSV4_NOTIFYBITMAP || cnt < 0) {
		nd->nd_repstat = NFSERR_INVAL;
		goto nfsmout;
	}
	if (cnt > 0) {
		NFSM_DISSECT(tl, uint32_t *, cnt * NFSX_UNSIGNED);
		for (i = 0; i < cnt; i++)
			notify[i] = fxdr_unsigned(uint32_t, *tl++);
	}
	for (i = cnt; i < NFSV4_NOTIFYBITMAP; i++)
		notify[i] = 0;

	/*
	 * Check that the device id is not stale.  Device ids are recreated
	 * each time the nfsd threads are restarted.
	 */
	NFSBCOPY(devid, &dev_time, sizeof(dev_time));
	if (dev_time != nfsdev_time) {
		nd->nd_repstat = NFSERR_NOENT;
		goto nfsmout;
	}

	/* Look for the device id. */
	nd->nd_repstat = nfsrv_getdevinfo(devid, layouttype, &maxcnt,
	    notify, &devaddrlen, &devaddr);
	NFSD_DEBUG(4, "nfsrv_getdevinfo stat=%u\n", nd->nd_repstat);
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
		*tl = txdr_unsigned(layouttype);
		nfsm_strtom(nd, devaddr, devaddrlen);
		cnt = 0;
		for (i = 0; i < NFSV4_NOTIFYBITMAP; i++) {
			if (notify[i] != 0)
				cnt = i + 1;
		}
		NFSM_BUILD(tl, uint32_t *, (cnt + 1) * NFSX_UNSIGNED);
		*tl++ = txdr_unsigned(cnt);
		for (i = 0; i < cnt; i++)
			*tl++ = txdr_unsigned(notify[i]);
	} else if (nd->nd_repstat == NFSERR_TOOSMALL) {
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
		*tl = txdr_unsigned(maxcnt);
	}
nfsmout:
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfsv4 test stateid service
 */
int
nfsrvd_teststateid(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	nfsv4stateid_t *stateidp = NULL, *tstateidp;
	int cnt, error = 0, i, ret;
	struct thread *p = curthread;

	NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	cnt = fxdr_unsigned(int, *tl);
	if (cnt <= 0 || cnt > 1024) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	stateidp = mallocarray(cnt, sizeof(nfsv4stateid_t), M_TEMP, M_WAITOK);
	tstateidp = stateidp;
	for (i = 0; i < cnt; i++) {
		NFSM_DISSECT(tl, uint32_t *, NFSX_STATEID);
		tstateidp->seqid = fxdr_unsigned(uint32_t, *tl++);
		NFSBCOPY(tl, tstateidp->other, NFSX_STATEIDOTHER);
		tstateidp++;
	}
	NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
	*tl = txdr_unsigned(cnt);
	tstateidp = stateidp;
	for (i = 0; i < cnt; i++) {
		ret = nfsrv_teststateid(nd, tstateidp, p);
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
		*tl = txdr_unsigned(ret);
		tstateidp++;
	}
nfsmout:
	free(stateidp, M_TEMP);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs allocate service
 */
int
nfsrvd_allocate(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	struct nfsvattr forat;
	int error = 0, forat_ret = 1, gotproxystateid;
	off_t off, len;
	struct nfsstate st, *stp = &st;
	struct nfslock lo, *lop = &lo;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	nfsattrbit_t attrbits;

	if (!nfsrv_doallocate) {
		/*
		 * If any exported file system, such as a ZFS one, cannot
		 * do VOP_ALLOCATE(), this operation cannot be supported
		 * for NFSv4.2.  This cannot be done 'per filesystem', but
		 * must be for the entire nfsd NFSv4.2 service.
		 */
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}
	gotproxystateid = 0;
	NFSM_DISSECT(tl, uint32_t *, NFSX_STATEID + 2 * NFSX_HYPER);
	stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS);
	lop->lo_flags = NFSLCK_WRITE;
	stp->ls_ownerlen = 0;
	stp->ls_op = NULL;
	stp->ls_uid = nd->nd_cred->cr_uid;
	stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
	clientid.lval[0] = stp->ls_stateid.other[0] = *tl++;
	clientid.lval[1] = stp->ls_stateid.other[1] = *tl++;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK2 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	stp->ls_stateid.other[2] = *tl++;
	/*
	 * Don't allow this to be done for a DS.
	 */
	if ((nd->nd_flag & ND_DSSERVER) != 0)
		nd->nd_repstat = NFSERR_NOTSUPP;
	/* However, allow the proxy stateid. */
	if (stp->ls_stateid.seqid == 0xffffffff &&
	    stp->ls_stateid.other[0] == 0x55555555 &&
	    stp->ls_stateid.other[1] == 0x55555555 &&
	    stp->ls_stateid.other[2] == 0x55555555)
		gotproxystateid = 1;
	off = fxdr_hyper(tl); tl += 2;
	lop->lo_first = off;
	len = fxdr_hyper(tl);
	lop->lo_end = lop->lo_first + len;
	/*
	 * Sanity check the offset and length.
	 * off and len are off_t (signed int64_t) whereas
	 * lo_first and lo_end are uint64_t and, as such,
	 * if off >= 0 && len > 0, lo_end cannot overflow
	 * unless off_t is changed to something other than
	 * int64_t.  Check lo_end < lo_first in case that
	 * is someday the case.
	 */
	if (nd->nd_repstat == 0 && (len <= 0 || off < 0 || lop->lo_end >
	    OFF_MAX || lop->lo_end < lop->lo_first))
		nd->nd_repstat = NFSERR_INVAL;

	if (nd->nd_repstat == 0 && vp->v_type != VREG)
		nd->nd_repstat = NFSERR_WRONGTYPE;
	NFSZERO_ATTRBIT(&attrbits);
	NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER);
	forat_ret = nfsvno_getattr(vp, &forat, nd, curthread, 1, &attrbits);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = forat_ret;
	if (nd->nd_repstat == 0 && (forat.na_uid != nd->nd_cred->cr_uid ||
	     NFSVNO_EXSTRICTACCESS(exp)))
		nd->nd_repstat = nfsvno_accchk(vp, VWRITE, nd->nd_cred, exp,
		    curthread, NFSACCCHK_ALLOWOWNER, NFSACCCHK_VPISLOCKED,
		    NULL);
	if (nd->nd_repstat == 0 && gotproxystateid == 0)
		nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
		    &stateid, exp, nd, curthread);

	NFSD_DEBUG(4, "nfsrvd_allocate: off=%jd len=%jd stat=%d\n",
	    (intmax_t)off, (intmax_t)len, nd->nd_repstat);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = nfsvno_allocate(vp, off, len, nd->nd_cred,
		    curthread);
	NFSD_DEBUG(4, "nfsrvd_allocate: aft nfsvno_allocate=%d\n",
	    nd->nd_repstat);
	vput(vp);
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs deallocate service
 */
int
nfsrvd_deallocate(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	struct nfsvattr forat;
	int error = 0, forat_ret = 1, gotproxystateid;
	off_t off, len;
	struct nfsstate st, *stp = &st;
	struct nfslock lo, *lop = &lo;
	nfsv4stateid_t stateid;
	nfsquad_t clientid;
	nfsattrbit_t attrbits;

	gotproxystateid = 0;
	NFSM_DISSECT(tl, uint32_t *, NFSX_STATEID + 2 * NFSX_HYPER);
	stp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS);
	lop->lo_flags = NFSLCK_WRITE;
	stp->ls_ownerlen = 0;
	stp->ls_op = NULL;
	stp->ls_uid = nd->nd_cred->cr_uid;
	stp->ls_stateid.seqid = fxdr_unsigned(u_int32_t, *tl++);
	clientid.lval[0] = stp->ls_stateid.other[0] = *tl++;
	clientid.lval[1] = stp->ls_stateid.other[1] = *tl++;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0) {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			clientid.qval = nd->nd_clientid.qval;
		else if (nd->nd_clientid.qval != clientid.qval)
			printf("EEK2 multiple clids\n");
	} else {
		if ((nd->nd_flag & ND_NFSV41) != 0)
			printf("EEK! no clientid from session\n");
		nd->nd_flag |= ND_IMPLIEDCLID;
		nd->nd_clientid.qval = clientid.qval;
	}
	stp->ls_stateid.other[2] = *tl++;
	/*
	 * Don't allow this to be done for a DS.
	 */
	if ((nd->nd_flag & ND_DSSERVER) != 0)
		nd->nd_repstat = NFSERR_NOTSUPP;
	/* However, allow the proxy stateid. */
	if (stp->ls_stateid.seqid == 0xffffffff &&
	    stp->ls_stateid.other[0] == 0x55555555 &&
	    stp->ls_stateid.other[1] == 0x55555555 &&
	    stp->ls_stateid.other[2] == 0x55555555)
		gotproxystateid = 1;
	off = fxdr_hyper(tl); tl += 2;
	lop->lo_first = off;
	len = fxdr_hyper(tl);
	if (len < 0)
		len = OFF_MAX;
	NFSD_DEBUG(4, "dealloc: off=%jd len=%jd\n", (intmax_t)off,
	    (intmax_t)len);
	lop->lo_end = lop->lo_first + len;
	/*
	 * Sanity check the offset and length.
	 * off and len are off_t (signed int64_t) whereas
	 * lo_first and lo_end are uint64_t and, as such,
	 * if off >= 0 && len > 0, lo_end cannot overflow
	 * unless off_t is changed to something other than
	 * int64_t.  Check lo_end < lo_first in case that
	 * is someday the case.
	 * The error to return is not specified by RFC 7862 so I
	 * made this compatible with the Linux knfsd.
	 */
	if (nd->nd_repstat == 0) {
		if (off < 0 || lop->lo_end > NFSRV_MAXFILESIZE)
			nd->nd_repstat = NFSERR_FBIG;
		else if (len == 0 || lop->lo_end < lop->lo_first)
			nd->nd_repstat = NFSERR_INVAL;
	}

	if (nd->nd_repstat == 0 && vp->v_type != VREG)
		nd->nd_repstat = NFSERR_WRONGTYPE;
	NFSZERO_ATTRBIT(&attrbits);
	NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER);
	forat_ret = nfsvno_getattr(vp, &forat, nd, curthread, 1, &attrbits);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = forat_ret;
	if (nd->nd_repstat == 0 && (forat.na_uid != nd->nd_cred->cr_uid ||
	     NFSVNO_EXSTRICTACCESS(exp)))
		nd->nd_repstat = nfsvno_accchk(vp, VWRITE, nd->nd_cred, exp,
		    curthread, NFSACCCHK_ALLOWOWNER, NFSACCCHK_VPISLOCKED,
		    NULL);
	if (nd->nd_repstat == 0 && gotproxystateid == 0)
		nd->nd_repstat = nfsrv_lockctrl(vp, &stp, &lop, NULL, clientid,
		    &stateid, exp, nd, curthread);

	if (nd->nd_repstat == 0)
		nd->nd_repstat = nfsvno_deallocate(vp, off, len, nd->nd_cred,
		    curthread);
	vput(vp);
	NFSD_DEBUG(4, "eo deallocate=%d\n", nd->nd_repstat);
	NFSEXITCODE2(0, nd);
	return (0);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs copy service
 */
int
nfsrvd_copy_file_range(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, vnode_t tovp, struct nfsexstuff *exp, struct nfsexstuff *toexp)
{
	uint32_t *tl;
	struct nfsvattr at;
	int cnt, error = 0, ret;
	off_t inoff, outoff;
	uint64_t len;
	size_t xfer;
	struct nfsstate inst, outst, *instp = &inst, *outstp = &outst;
	struct nfslock inlo, outlo, *inlop = &inlo, *outlop = &outlo;
	nfsquad_t clientid;
	nfsv4stateid_t stateid;
	nfsattrbit_t attrbits;
	void *rl_rcookie, *rl_wcookie;

	rl_rcookie = rl_wcookie = NULL;
	if (nfsrv_devidcnt > 0) {
		/*
		 * For a pNFS server, reply NFSERR_NOTSUPP so that the client
		 * will do the copy via I/O on the DS(s).
		 */
		nd->nd_repstat = NFSERR_NOTSUPP;
		goto nfsmout;
	}
	if (vp == tovp) {
		/* Copying a byte range within the same file is not allowed. */
		nd->nd_repstat = NFSERR_INVAL;
		goto nfsmout;
	}
	NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_STATEID + 3 * NFSX_HYPER +
	    3 * NFSX_UNSIGNED);
	instp->ls_flags = (NFSLCK_CHECK | NFSLCK_READACCESS);
	inlop->lo_flags = NFSLCK_READ;
	instp->ls_ownerlen = 0;
	instp->ls_op = NULL;
	instp->ls_uid = nd->nd_cred->cr_uid;
	instp->ls_stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	clientid.lval[0] = instp->ls_stateid.other[0] = *tl++;
	clientid.lval[1] = instp->ls_stateid.other[1] = *tl++;
	if ((nd->nd_flag & ND_IMPLIEDCLID) != 0)
		clientid.qval = nd->nd_clientid.qval;
	instp->ls_stateid.other[2] = *tl++;
	outstp->ls_flags = (NFSLCK_CHECK | NFSLCK_WRITEACCESS);
	outlop->lo_flags = NFSLCK_WRITE;
	outstp->ls_ownerlen = 0;
	outstp->ls_op = NULL;
	outstp->ls_uid = nd->nd_cred->cr_uid;
	outstp->ls_stateid.seqid = fxdr_unsigned(uint32_t, *tl++);
	outstp->ls_stateid.other[0] = *tl++;
	outstp->ls_stateid.other[1] = *tl++;
	outstp->ls_stateid.other[2] = *tl++;
	inoff = fxdr_hyper(tl); tl += 2;
	inlop->lo_first = inoff;
	outoff = fxdr_hyper(tl); tl += 2;
	outlop->lo_first = outoff;
	len = fxdr_hyper(tl); tl += 2;
	if (len == 0) {
		/* len == 0 means to EOF. */
		inlop->lo_end = OFF_MAX;
		outlop->lo_end = OFF_MAX;
	} else {
		inlop->lo_end = inlop->lo_first + len;
		outlop->lo_end = outlop->lo_first + len;
	}

	/*
	 * At this time only consecutive, synchronous copy is supported,
	 * so ca_consecutive and ca_synchronous can be ignored.
	 */
	tl += 2;

	cnt = fxdr_unsigned(int, *tl);
	if ((nd->nd_flag & ND_DSSERVER) != 0 || cnt != 0)
		nd->nd_repstat = NFSERR_NOTSUPP;
	if (nd->nd_repstat == 0 && (inoff > OFF_MAX || outoff > OFF_MAX ||
	    inlop->lo_end > OFF_MAX || outlop->lo_end > OFF_MAX ||
	    inlop->lo_end < inlop->lo_first || outlop->lo_end <
	    outlop->lo_first))
		nd->nd_repstat = NFSERR_INVAL;

	if (nd->nd_repstat == 0 && vp->v_type != VREG)
		nd->nd_repstat = NFSERR_WRONGTYPE;

	/* Check permissions for the input file. */
	NFSZERO_ATTRBIT(&attrbits);
	NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER);
	ret = nfsvno_getattr(vp, &at, nd, curthread, 1, &attrbits);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = ret;
	if (nd->nd_repstat == 0 && (at.na_uid != nd->nd_cred->cr_uid ||
	     NFSVNO_EXSTRICTACCESS(exp)))
		nd->nd_repstat = nfsvno_accchk(vp, VREAD, nd->nd_cred, exp,
		    curthread, NFSACCCHK_ALLOWOWNER, NFSACCCHK_VPISLOCKED,
		    NULL);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = nfsrv_lockctrl(vp, &instp, &inlop, NULL,
		    clientid, &stateid, exp, nd, curthread);
	NFSVOPUNLOCK(vp);
	if (nd->nd_repstat != 0)
		goto out;

	error = NFSVOPLOCK(tovp, LK_SHARED);
	if (error != 0)
		goto out;
	if (tovp->v_type != VREG)
		nd->nd_repstat = NFSERR_WRONGTYPE;

	/* For the output file, we only need the Owner attribute. */
	ret = nfsvno_getattr(tovp, &at, nd, curthread, 1, &attrbits);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = ret;
	if (nd->nd_repstat == 0 && (at.na_uid != nd->nd_cred->cr_uid ||
	     NFSVNO_EXSTRICTACCESS(exp)))
		nd->nd_repstat = nfsvno_accchk(tovp, VWRITE, nd->nd_cred, toexp,
		    curthread, NFSACCCHK_ALLOWOWNER, NFSACCCHK_VPISLOCKED,
		    NULL);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = nfsrv_lockctrl(tovp, &outstp, &outlop, NULL,
		    clientid, &stateid, toexp, nd, curthread);
	NFSVOPUNLOCK(tovp);

	/* Range lock the byte ranges for both invp and outvp. */
	if (nd->nd_repstat == 0) {
		for (;;) {
			if (len == 0) {
				rl_wcookie = vn_rangelock_wlock(tovp, outoff,
				    OFF_MAX);
				rl_rcookie = vn_rangelock_tryrlock(vp, inoff,
				    OFF_MAX);
			} else {
				rl_wcookie = vn_rangelock_wlock(tovp, outoff,
				    outoff + len);
				rl_rcookie = vn_rangelock_tryrlock(vp, inoff,
				    inoff + len);
			}
			if (rl_rcookie != NULL)
				break;
			vn_rangelock_unlock(tovp, rl_wcookie);
			if (len == 0)
				rl_rcookie = vn_rangelock_rlock(vp, inoff,
				    OFF_MAX);
			else
				rl_rcookie = vn_rangelock_rlock(vp, inoff,
				    inoff + len);
			vn_rangelock_unlock(vp, rl_rcookie);
		}

		error = NFSVOPLOCK(vp, LK_SHARED);
		if (error == 0) {
			ret = nfsvno_getattr(vp, &at, nd, curthread, 1, NULL);
			if (ret == 0) {
				/*
				 * Since invp is range locked, na_size should
				 * not change.
				 */
				if (len == 0 && at.na_size > inoff) {
					/*
					 * If len == 0, set it based on invp's 
					 * size. If offset is past EOF, just
					 * leave len == 0.
					 */
					len = at.na_size - inoff;
				} else if (nfsrv_linux42server == 0 &&
				    inoff + len > at.na_size) {
					/*
					 * RFC-7862 says that NFSERR_INVAL must
					 * be returned when inoff + len exceeds
					 * the file size, however the NFSv4.2
					 * Linux client likes to do this, so
					 * only check if nfsrv_linux42server
					 * is not set.
					 */
					nd->nd_repstat = NFSERR_INVAL;
				}
			}
			NFSVOPUNLOCK(vp);
			if (ret != 0 && nd->nd_repstat == 0)
				nd->nd_repstat = ret;
		} else if (nd->nd_repstat == 0)
			nd->nd_repstat = error;
	}

	xfer = len;
	if (nd->nd_repstat == 0) {
		nd->nd_repstat = vn_copy_file_range(vp, &inoff, tovp, &outoff,
		    &xfer, COPY_FILE_RANGE_TIMEO1SEC, nd->nd_cred, nd->nd_cred,
		    NULL);
		if (nd->nd_repstat == 0)
			len = xfer;
	}

	/* Unlock the ranges. */
	if (rl_rcookie != NULL)
		vn_rangelock_unlock(vp, rl_rcookie);
	if (rl_wcookie != NULL)
		vn_rangelock_unlock(tovp, rl_wcookie);

	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, 4 * NFSX_UNSIGNED + NFSX_HYPER +
		    NFSX_VERF);
		*tl++ = txdr_unsigned(0);	/* No callback ids. */
		txdr_hyper(len, tl); tl += 2;
		*tl++ = txdr_unsigned(NFSWRITE_UNSTABLE);
		*tl++ = txdr_unsigned(nfsboottime.tv_sec);
		*tl++ = txdr_unsigned(nfsboottime.tv_usec);
		*tl++ = newnfs_true;
		*tl = newnfs_true;
	}
out:
	vrele(vp);
	vrele(tovp);
	NFSEXITCODE2(error, nd);
	return (error);
nfsmout:
	vput(vp);
	vrele(tovp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs seek service
 */
int
nfsrvd_seek(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, struct nfsexstuff *exp)
{
	uint32_t *tl;
	struct nfsvattr at;
	int content, error = 0;
	off_t off;
	u_long cmd;
	nfsattrbit_t attrbits;
	bool eof;

	NFSM_DISSECT(tl, uint32_t *, NFSX_STATEID + NFSX_HYPER + NFSX_UNSIGNED);
	/* Ignore the stateid for now. */
	tl += (NFSX_STATEID / NFSX_UNSIGNED);
	off = fxdr_hyper(tl); tl += 2;
	content = fxdr_unsigned(int, *tl);
	if (content == NFSV4CONTENT_DATA)
		cmd = FIOSEEKDATA;
	else if (content == NFSV4CONTENT_HOLE)
		cmd = FIOSEEKHOLE;
	else
		nd->nd_repstat = NFSERR_BADXDR;
	if (nd->nd_repstat == 0 && vp->v_type == VDIR)
		nd->nd_repstat = NFSERR_ISDIR;
	if (nd->nd_repstat == 0 && vp->v_type != VREG)
		nd->nd_repstat = NFSERR_WRONGTYPE;
	if (nd->nd_repstat == 0 && off < 0)
		nd->nd_repstat = NFSERR_NXIO;
	if (nd->nd_repstat == 0) {
		/* Check permissions for the input file. */
		NFSZERO_ATTRBIT(&attrbits);
		NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_OWNER);
		nd->nd_repstat = nfsvno_getattr(vp, &at, nd, curthread, 1,
		    &attrbits);
	}
	if (nd->nd_repstat == 0 && (at.na_uid != nd->nd_cred->cr_uid ||
	     NFSVNO_EXSTRICTACCESS(exp)))
		nd->nd_repstat = nfsvno_accchk(vp, VREAD, nd->nd_cred, exp,
		    curthread, NFSACCCHK_ALLOWOWNER, NFSACCCHK_VPISLOCKED,
		    NULL);
	if (nd->nd_repstat != 0)
		goto nfsmout;

	/* nfsvno_seek() unlocks and vrele()s the vp. */
	nd->nd_repstat = nfsvno_seek(nd, vp, cmd, &off, content, &eof,
	    nd->nd_cred, curthread);
	if (nd->nd_repstat == 0 && eof && content == NFSV4CONTENT_DATA &&
	    nfsrv_linux42server != 0)
		nd->nd_repstat = NFSERR_NXIO;
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED + NFSX_HYPER);
		if (eof)
			*tl++ = newnfs_true;
		else
			*tl++ = newnfs_false;
		txdr_hyper(off, tl);
	}
	NFSEXITCODE2(error, nd);
	return (error);
nfsmout:
	vput(vp);
	NFSEXITCODE2(error, nd);
	return (error);
}

/*
 * nfs get extended attribute service
 */
int
nfsrvd_getxattr(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	struct mbuf *mp = NULL, *mpend = NULL;
	int error, len;
	char *name;
	struct thread *p = curthread;
	uint16_t off;

	error = 0;
	NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	len = fxdr_unsigned(int, *tl);
	if (len <= 0) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	if (len > EXTATTR_MAXNAMELEN) {
		nd->nd_repstat = NFSERR_NOXATTR;
		goto nfsmout;
	}
	name = malloc(len + 1, M_TEMP, M_WAITOK);
	nd->nd_repstat = nfsrv_mtostr(nd, name, len);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = nfsvno_getxattr(vp, name,
		    nd->nd_maxresp, nd->nd_cred, nd->nd_flag,
		    nd->nd_maxextsiz, p, &mp, &mpend, &len);
	if (nd->nd_repstat == ENOATTR)
		nd->nd_repstat = NFSERR_NOXATTR;
	else if (nd->nd_repstat == EOPNOTSUPP)
		nd->nd_repstat = NFSERR_NOTSUPP;
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
		*tl = txdr_unsigned(len);
		if (len > 0) {
			nd->nd_mb->m_next = mp;
			nd->nd_mb = mpend;
			if ((mpend->m_flags & M_EXTPG) != 0) {
				nd->nd_flag |= ND_EXTPG;
				nd->nd_bextpg = mpend->m_epg_npgs - 1;
				nd->nd_bpos = (char *)(void *)
				   PHYS_TO_DMAP(mpend->m_epg_pa[nd->nd_bextpg]);
				off = (nd->nd_bextpg == 0) ?
				    mpend->m_epg_1st_off : 0;
				nd->nd_bpos += off + mpend->m_epg_last_len;
				nd->nd_bextpgsiz = PAGE_SIZE -
				    mpend->m_epg_last_len - off;
			} else
				nd->nd_bpos = mtod(mpend, char *) +
				    mpend->m_len;
		}
	}
	free(name, M_TEMP);

nfsmout:
	if (nd->nd_repstat == 0)
		nd->nd_repstat = error;
	vput(vp);
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfs set extended attribute service
 */
int
nfsrvd_setxattr(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	struct nfsvattr ova, nva;
	nfsattrbit_t attrbits;
	int error, len, opt;
	char *name;
	size_t siz;
	struct thread *p = curthread;

	error = 0;
	name = NULL;
	NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED);
	opt = fxdr_unsigned(int, *tl++);
	len = fxdr_unsigned(int, *tl);
	if (len <= 0) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	if (len > EXTATTR_MAXNAMELEN) {
		nd->nd_repstat = NFSERR_NOXATTR;
		goto nfsmout;
	}
	name = malloc(len + 1, M_TEMP, M_WAITOK);
	error = nfsrv_mtostr(nd, name, len);
	if (error != 0)
		goto nfsmout;
	NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	len = fxdr_unsigned(int, *tl);
	if (len < 0 || len > IOSIZE_MAX) {
		nd->nd_repstat = NFSERR_XATTR2BIG;
		goto nfsmout;
	}
	switch (opt) {
	case NFSV4SXATTR_CREATE:
		error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL,
		    &siz, nd->nd_cred, p);
		if (error != ENOATTR)
			nd->nd_repstat = NFSERR_EXIST;
		error = 0;
		break;
	case NFSV4SXATTR_REPLACE:
		error = VOP_GETEXTATTR(vp, EXTATTR_NAMESPACE_USER, name, NULL,
		    &siz, nd->nd_cred, p);
		if (error != 0)
			nd->nd_repstat = NFSERR_NOXATTR;
		break;
	case NFSV4SXATTR_EITHER:
		break;
	default:
		nd->nd_repstat = NFSERR_BADXDR;
	}
	if (nd->nd_repstat != 0)
		goto nfsmout;

	/* Now, do the Set Extended attribute, with Change before and after. */
	NFSZERO_ATTRBIT(&attrbits);
	NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE);
	nd->nd_repstat = nfsvno_getattr(vp, &ova, nd, p, 1, &attrbits);
	if (nd->nd_repstat == 0) {
		nd->nd_repstat = nfsvno_setxattr(vp, name, len, nd->nd_md,
		    nd->nd_dpos, nd->nd_cred, p);
		if (nd->nd_repstat == ENXIO)
			nd->nd_repstat = NFSERR_XATTR2BIG;
	}
	if (nd->nd_repstat == 0 && len > 0)
		nd->nd_repstat = nfsm_advance(nd, NFSM_RNDUP(len), -1);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1, &attrbits);
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED);
		*tl++ = newnfs_true;
		txdr_hyper(ova.na_filerev, tl); tl += 2;
		txdr_hyper(nva.na_filerev, tl);
	}

nfsmout:
	free(name, M_TEMP);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = error;
	vput(vp);
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfs remove extended attribute service
 */
int
nfsrvd_rmxattr(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t *tl;
	struct nfsvattr ova, nva;
	nfsattrbit_t attrbits;
	int error, len;
	char *name;
	struct thread *p = curthread;

	error = 0;
	name = NULL;
	NFSM_DISSECT(tl, uint32_t *, NFSX_UNSIGNED);
	len = fxdr_unsigned(int, *tl);
	if (len <= 0) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	if (len > EXTATTR_MAXNAMELEN) {
		nd->nd_repstat = NFSERR_NOXATTR;
		goto nfsmout;
	}
	name = malloc(len + 1, M_TEMP, M_WAITOK);
	error = nfsrv_mtostr(nd, name, len);
	if (error != 0)
		goto nfsmout;

	if ((nd->nd_flag & ND_IMPLIEDCLID) == 0) {
		printf("EEK! nfsrvd_rmxattr: no implied clientid\n");
		error = NFSERR_NOXATTR;
		goto nfsmout;
	}
	/*
	 * Now, do the Remove Extended attribute, with Change before and
	 * after.
	*/
	NFSZERO_ATTRBIT(&attrbits);
	NFSSETBIT_ATTRBIT(&attrbits, NFSATTRBIT_CHANGE);
	nd->nd_repstat = nfsvno_getattr(vp, &ova, nd, p, 1, &attrbits);
	if (nd->nd_repstat == 0) {
		nd->nd_repstat = nfsvno_rmxattr(nd, vp, name, nd->nd_cred, p);
		if (nd->nd_repstat == ENOATTR)
			nd->nd_repstat = NFSERR_NOXATTR;
	}
	if (nd->nd_repstat == 0)
		nd->nd_repstat = nfsvno_getattr(vp, &nva, nd, p, 1, &attrbits);
	if (nd->nd_repstat == 0) {
		NFSM_BUILD(tl, uint32_t *, 2 * NFSX_HYPER + NFSX_UNSIGNED);
		*tl++ = newnfs_true;
		txdr_hyper(ova.na_filerev, tl); tl += 2;
		txdr_hyper(nva.na_filerev, tl);
	}

nfsmout:
	free(name, M_TEMP);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = error;
	vput(vp);
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfs list extended attribute service
 */
int
nfsrvd_listxattr(struct nfsrv_descript *nd, __unused int isdgram,
    vnode_t vp, __unused struct nfsexstuff *exp)
{
	uint32_t cnt, *tl, len, len2, i, pos, retlen;
	int error;
	uint64_t cookie, cookie2;
	u_char *buf;
	bool eof;
	struct thread *p = curthread;

	error = 0;
	buf = NULL;
	NFSM_DISSECT(tl, uint32_t *, NFSX_HYPER + NFSX_UNSIGNED);
	/*
	 * The cookie doesn't need to be in net byte order, but FreeBSD
	 * does so to make it more readable in packet traces.
	 */
	cookie = fxdr_hyper(tl); tl += 2;
	len = fxdr_unsigned(uint32_t, *tl);
	if (len == 0 || cookie >= IOSIZE_MAX) {
		nd->nd_repstat = NFSERR_BADXDR;
		goto nfsmout;
	}
	if (len > nd->nd_maxresp - NFS_MAXXDR)
		len = nd->nd_maxresp - NFS_MAXXDR;
	len2 = len;
	nd->nd_repstat = nfsvno_listxattr(vp, cookie, nd->nd_cred, p, &buf,
	    &len, &eof);
	if (nd->nd_repstat == EOPNOTSUPP)
		nd->nd_repstat = NFSERR_NOTSUPP;
	if (nd->nd_repstat == 0) {
		cookie2 = cookie + len;
		if (cookie2 < cookie)
			nd->nd_repstat = NFSERR_BADXDR;
	}
	retlen = NFSX_HYPER + 2 * NFSX_UNSIGNED;
	if (nd->nd_repstat == 0 && len2 < retlen)
		nd->nd_repstat = NFSERR_TOOSMALL;
	if (nd->nd_repstat == 0) {
		/* Now copy the entries out. */
		if (len == 0) {
			/* The cookie was at eof. */
			NFSM_BUILD(tl, uint32_t *, NFSX_HYPER + 2 *
			    NFSX_UNSIGNED);
			txdr_hyper(cookie2, tl); tl += 2;
			*tl++ = txdr_unsigned(0);
			*tl = newnfs_true;
			goto nfsmout;
		}

		/* Sanity check the cookie. */
		for (pos = 0; pos < len; pos += (i + 1)) {
			if (pos == cookie)
				break;
			i = buf[pos];
		}
		if (pos != cookie) {
			nd->nd_repstat = NFSERR_INVAL;
			goto nfsmout;
		}

		/* Loop around copying the entrie(s) out. */
		cnt = 0;
		len -= cookie;
		i = buf[pos];
		while (i < len && len2 >= retlen + NFSM_RNDUP(i) +
		    NFSX_UNSIGNED) {
			if (cnt == 0) {
				NFSM_BUILD(tl, uint32_t *, NFSX_HYPER +
				    NFSX_UNSIGNED);
				txdr_hyper(cookie2, tl); tl += 2;
			}
			retlen += nfsm_strtom(nd, &buf[pos + 1], i);
			len -= (i + 1);
			pos += (i + 1);
			i = buf[pos];
			cnt++;
		}
		/*
		 * eof is set true/false by nfsvno_listxattr(), but if we
		 * can't copy all entries returned by nfsvno_listxattr(),
		 * we are not at eof.
		 */
		if (len > 0)
			eof = false;
		if (cnt > 0) {
			/* *tl is set above. */
			*tl = txdr_unsigned(cnt);
			NFSM_BUILD(tl, uint32_t *, NFSX_UNSIGNED);
			if (eof)
				*tl = newnfs_true;
			else
				*tl = newnfs_false;
		} else
			nd->nd_repstat = NFSERR_TOOSMALL;
	}

nfsmout:
	free(buf, M_TEMP);
	if (nd->nd_repstat == 0)
		nd->nd_repstat = error;
	vput(vp);
	NFSEXITCODE2(0, nd);
	return (0);
}

/*
 * nfsv4 service not supported
 */
int
nfsrvd_notsupp(struct nfsrv_descript *nd, __unused int isdgram,
    __unused vnode_t vp, __unused struct nfsexstuff *exp)
{

	nd->nd_repstat = NFSERR_NOTSUPP;
	NFSEXITCODE2(0, nd);
	return (0);
}