/*-
 * 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.
 */

#ifndef _NFS_NFSPORT_H_
#define	_NFS_NFSPORT_H_

/*
 * In general, I'm not fond of #includes in .h files, but this seems
 * to be the cleanest way to handle #include files for the ports.
 */
#ifdef _KERNEL
#include <sys/unistd.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/dirent.h>
#include <sys/domain.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/lockf.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/reboot.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <sys/sysproto.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/vnode.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/acl.h>
#include <sys/module.h>
#include <sys/sysent.h>
#include <sys/syscall.h>
#include <sys/priv.h>
#include <sys/kthread.h>
#include <sys/syscallsubr.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/radix.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <machine/in_cksum.h>
#include <sys/md5.h>
#include <rpc/rpc.h>
#include <rpc/rpcsec_gss.h>

#include <ufs/ufs/dir.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ufs/ufsmount.h>
#include <vm/uma.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/vm_param.h>
#include <nfs/nfssvc.h>
#include "opt_nfs.h"
#include "opt_ufs.h"

/*
 * These types must be defined before the nfs includes.
 */
#define	NFSSOCKADDR_T	struct sockaddr *
#define	NFSPROC_T	struct thread
#define	NFSDEV_T	dev_t
#define	NFSSVCARGS	nfssvc_args
#define	NFSACL_T	struct acl

/*
 * These should be defined as the types used for the corresponding VOP's
 * argument type.
 */
#define	NFS_ACCESS_ARGS		struct vop_access_args
#define	NFS_OPEN_ARGS		struct vop_open_args
#define	NFS_GETATTR_ARGS	struct vop_getattr_args
#define	NFS_LOOKUP_ARGS		struct vop_lookup_args
#define	NFS_READDIR_ARGS	struct vop_readdir_args

/*
 * Allocate mbufs. Must succeed and never set the mbuf ptr to NULL.
 */
#define	NFSMGET(m)	do { 					\
		MGET((m), M_WAITOK, MT_DATA); 			\
		while ((m) == NULL ) { 				\
			(void) nfs_catnap(PZERO, 0, "nfsmget");	\
			MGET((m), M_WAITOK, MT_DATA); 		\
		} 						\
	} while (0)
#define	NFSMGETHDR(m)	do { 					\
		MGETHDR((m), M_WAITOK, MT_DATA);		\
		while ((m) == NULL ) { 				\
			(void) nfs_catnap(PZERO, 0, "nfsmget");	\
			MGETHDR((m), M_WAITOK, MT_DATA); 	\
		} 						\
	} while (0)
#define	NFSMCLGET(m, w)	do { 					\
		MGET((m), M_WAITOK, MT_DATA); 			\
		while ((m) == NULL ) { 				\
			(void) nfs_catnap(PZERO, 0, "nfsmget");	\
			MGET((m), M_WAITOK, MT_DATA); 		\
		} 						\
		MCLGET((m), (w));				\
	} while (0)
#define	NFSMCLGETHDR(m, w) do { 				\
		MGETHDR((m), M_WAITOK, MT_DATA);		\
		while ((m) == NULL ) { 				\
			(void) nfs_catnap(PZERO, 0, "nfsmget");	\
			MGETHDR((m), M_WAITOK, MT_DATA); 	\
		} 						\
	} while (0)

/*
 * Client side constant for size of a lockowner name.
 */
#define	NFSV4CL_LOCKNAMELEN	12

/*
 * Type for a mutex lock.
 */
#define	NFSMUTEX_T		struct mtx

/* Just define the NFSD_VNETxxx() macros as VNETxxx() macros. */
#define	NFSD_VNET_NAME(n)		VNET_NAME(n)
#define	NFSD_VNET_DECLARE(t, n)		VNET_DECLARE(t, n)
#define	NFSD_VNET_DEFINE(t, n)		VNET_DEFINE(t, n)
#define	NFSD_VNET_DEFINE_STATIC(t, n)	VNET_DEFINE_STATIC(t, n)
#define	NFSD_VNET(n)			VNET(n)

#define	CTLFLAG_NFSD_VNET		CTLFLAG_VNET

#define	NFSD_CURVNET_SET(n)		CURVNET_SET(n)
#define	NFSD_CURVNET_SET_QUIET(n)	CURVNET_SET_QUIET(n)
#define	NFSD_CURVNET_RESTORE()		CURVNET_RESTORE()
#define	NFSD_TD_TO_VNET(n)		TD_TO_VNET(n)

#endif	/* _KERNEL */

/*
 * NFSv4 Operation numbers.
 */
#define	NFSV4OP_ACCESS		3
#define	NFSV4OP_CLOSE		4
#define	NFSV4OP_COMMIT		5
#define	NFSV4OP_CREATE		6
#define	NFSV4OP_DELEGPURGE	7
#define	NFSV4OP_DELEGRETURN	8
#define	NFSV4OP_GETATTR		9
#define	NFSV4OP_GETFH		10
#define	NFSV4OP_LINK		11
#define	NFSV4OP_LOCK		12
#define	NFSV4OP_LOCKT		13
#define	NFSV4OP_LOCKU		14
#define	NFSV4OP_LOOKUP		15
#define	NFSV4OP_LOOKUPP		16
#define	NFSV4OP_NVERIFY		17
#define	NFSV4OP_OPEN		18
#define	NFSV4OP_OPENATTR	19
#define	NFSV4OP_OPENCONFIRM	20
#define	NFSV4OP_OPENDOWNGRADE	21
#define	NFSV4OP_PUTFH		22
#define	NFSV4OP_PUTPUBFH	23
#define	NFSV4OP_PUTROOTFH	24
#define	NFSV4OP_READ		25
#define	NFSV4OP_READDIR		26
#define	NFSV4OP_READLINK	27
#define	NFSV4OP_REMOVE		28
#define	NFSV4OP_RENAME		29
#define	NFSV4OP_RENEW		30
#define	NFSV4OP_RESTOREFH	31
#define	NFSV4OP_SAVEFH		32
#define	NFSV4OP_SECINFO		33
#define	NFSV4OP_SETATTR		34
#define	NFSV4OP_SETCLIENTID	35
#define	NFSV4OP_SETCLIENTIDCFRM	36
#define	NFSV4OP_VERIFY		37
#define	NFSV4OP_WRITE		38
#define	NFSV4OP_RELEASELCKOWN	39

/*
 * Must be one greater than the last Operation#.
 */
#define	NFSV4OP_NOPS		40

/*
 * Additional Ops for NFSv4.1.
 */
#define	NFSV4OP_BACKCHANNELCTL	40
#define	NFSV4OP_BINDCONNTOSESS	41
#define	NFSV4OP_EXCHANGEID	42
#define	NFSV4OP_CREATESESSION	43
#define	NFSV4OP_DESTROYSESSION	44
#define	NFSV4OP_FREESTATEID	45
#define	NFSV4OP_GETDIRDELEG	46
#define	NFSV4OP_GETDEVINFO	47
#define	NFSV4OP_GETDEVLIST	48
#define	NFSV4OP_LAYOUTCOMMIT	49
#define	NFSV4OP_LAYOUTGET	50
#define	NFSV4OP_LAYOUTRETURN	51
#define	NFSV4OP_SECINFONONAME	52
#define	NFSV4OP_SEQUENCE	53
#define	NFSV4OP_SETSSV		54
#define	NFSV4OP_TESTSTATEID	55
#define	NFSV4OP_WANTDELEG	56
#define	NFSV4OP_DESTROYCLIENTID	57
#define	NFSV4OP_RECLAIMCOMPL	58

/*
 * Must be one more than last op#.
 */
#define	NFSV41_NOPS		59

/*
 * Additional operations for NFSv4.2.
 */
#define	NFSV4OP_ALLOCATE	59
#define	NFSV4OP_COPY		60
#define	NFSV4OP_COPYNOTIFY	61
#define	NFSV4OP_DEALLOCATE	62
#define	NFSV4OP_IOADVISE	63
#define	NFSV4OP_LAYOUTERROR	64
#define	NFSV4OP_LAYOUTSTATS	65
#define	NFSV4OP_OFFLOADCANCEL	66
#define	NFSV4OP_OFFLOADSTATUS	67
#define	NFSV4OP_READPLUS	68
#define	NFSV4OP_SEEK		69
#define	NFSV4OP_WRITESAME	70
#define	NFSV4OP_CLONE		71

/* One greater than the last Operation # defined in RFC-7862. */
#define	NFSV42_PURENOPS		72

/* and the optional Extended attribute operations (RFC-8276). */
#define	NFSV4OP_GETXATTR	72
#define	NFSV4OP_SETXATTR	73
#define	NFSV4OP_LISTXATTRS	74
#define	NFSV4OP_REMOVEXATTR	75

/*
 * Must be one more than the last NFSv4.2 op#.
 */
#define	NFSV42_NOPS		76

/* Quirky case if the illegal op code */
#define	NFSV4OP_OPILLEGAL	10044

/*
 * Fake NFSV4OP_xxx used for nfsstat. Start at NFSV42_NOPS.
 */
#define	NFSV4OP_SYMLINK		(NFSV42_NOPS)
#define	NFSV4OP_MKDIR		(NFSV42_NOPS + 1)
#define	NFSV4OP_RMDIR		(NFSV42_NOPS + 2)
#define	NFSV4OP_READDIRPLUS	(NFSV42_NOPS + 3)
#define	NFSV4OP_MKNOD		(NFSV42_NOPS + 4)
#define	NFSV4OP_FSSTAT		(NFSV42_NOPS + 5)
#define	NFSV4OP_FSINFO		(NFSV42_NOPS + 6)
#define	NFSV4OP_PATHCONF	(NFSV42_NOPS + 7)
#define	NFSV4OP_V3CREATE	(NFSV42_NOPS + 8)

/*
 * This is the count of the fake operations listed above.
 */
#define	NFSV4OP_FAKENOPS	9

/*
 * and the Callback OPs
 */
#define	NFSV4OP_CBGETATTR	3
#define	NFSV4OP_CBRECALL	4

/*
 * Must be one greater than the last Callback Operation# for NFSv4.0.
 */
#define	NFSV4OP_CBNOPS		5

/*
 * Additional Callback Ops for NFSv4.1 only.
 */
#define	NFSV4OP_CBLAYOUTRECALL	5
#define	NFSV4OP_CBNOTIFY	6
#define	NFSV4OP_CBPUSHDELEG	7
#define	NFSV4OP_CBRECALLANY	8
#define	NFSV4OP_CBRECALLOBJAVAIL 9
#define	NFSV4OP_CBRECALLSLOT	10
#define	NFSV4OP_CBSEQUENCE	11
#define	NFSV4OP_CBWANTCANCELLED	12
#define	NFSV4OP_CBNOTIFYLOCK	13
#define	NFSV4OP_CBNOTIFYDEVID	14

#define	NFSV41_CBNOPS		15

/*
 * Additional callback operations for NFSv4.2.
 */
#define	NFSV4OP_CBOFFLOAD	15

#define	NFSV42_CBNOPS		16

/*
 * The lower numbers -> 21 are used by NFSv2 and v3. These define higher
 * numbers used by NFSv4.
 * NFS_V3NPROCS is one greater than the last V3 op and NFS_NPROCS is
 * one greater than the last number.
 */
#ifndef	NFS_V3NPROCS
#define	NFS_V3NPROCS		22

#define	NFSPROC_LOOKUPP		22
#define	NFSPROC_SETCLIENTID	23
#define	NFSPROC_SETCLIENTIDCFRM	24
#define	NFSPROC_LOCK		25
#define	NFSPROC_LOCKU		26
#define	NFSPROC_OPEN		27
#define	NFSPROC_CLOSE		28
#define	NFSPROC_OPENCONFIRM	29
#define	NFSPROC_LOCKT		30
#define	NFSPROC_OPENDOWNGRADE	31
#define	NFSPROC_RENEW		32
#define	NFSPROC_PUTROOTFH	33
#define	NFSPROC_RELEASELCKOWN	34
#define	NFSPROC_DELEGRETURN	35
#define	NFSPROC_RETDELEGREMOVE	36
#define	NFSPROC_RETDELEGRENAME1	37
#define	NFSPROC_RETDELEGRENAME2	38
#define	NFSPROC_GETACL		39
#define	NFSPROC_SETACL		40

/*
 * Must be defined as one higher than the last Proc# above.
 */
#define	NFSV4_NPROCS		41

/* Additional procedures for NFSv4.1. */
#define	NFSPROC_EXCHANGEID	41
#define	NFSPROC_CREATESESSION	42
#define	NFSPROC_DESTROYSESSION	43
#define	NFSPROC_DESTROYCLIENT	44
#define	NFSPROC_FREESTATEID	45
#define	NFSPROC_LAYOUTGET	46
#define	NFSPROC_GETDEVICEINFO	47
#define	NFSPROC_LAYOUTCOMMIT	48
#define	NFSPROC_LAYOUTRETURN	49
#define	NFSPROC_RECLAIMCOMPL	50
#define	NFSPROC_WRITEDS		51
#define	NFSPROC_READDS		52
#define	NFSPROC_COMMITDS	53
#define	NFSPROC_OPENLAYGET	54
#define	NFSPROC_CREATELAYGET	55

/*
 * Must be defined as one higher than the last NFSv4.1 Proc# above.
 */
#define	NFSV41_NPROCS		56

/* Additional procedures for NFSv4.2. */
#define	NFSPROC_IOADVISE	56
#define	NFSPROC_ALLOCATE	57
#define	NFSPROC_COPY		58
#define	NFSPROC_SEEK		59
#define	NFSPROC_SEEKDS		60

/* and the ones for the optional Extended attribute support (RFC-8276). */
#define	NFSPROC_GETEXTATTR	61
#define	NFSPROC_SETEXTATTR	62
#define	NFSPROC_RMEXTATTR	63
#define	NFSPROC_LISTEXTATTR	64

/* BindConnectionToSession, done by the krpc for a new connection. */
#define	NFSPROC_BINDCONNTOSESS	65

/* Do a Lookup+Open for "oneopenown". */
#define	NFSPROC_LOOKUPOPEN	66

/* Do an NFSv4.2 Deallocate. */
#define	NFSPROC_DEALLOCATE	67

/* Do an NFSv4.2 LayoutError. */
#define	NFSPROC_LAYOUTERROR	68

/* Do an NFSv4 Verify+Write. */
#define	NFSPROC_APPENDWRITE	69

/*
 * Must be defined as one higher than the last NFSv4.2 Proc# above.
 */
#define	NFSV42_NPROCS		70

/* Value of NFSV42_NPROCS for old nfsstats structure. (Always 69) */
#define	NFSV42_OLDNPROCS	69

#endif	/* NFS_V3NPROCS */

/*
 * Newest stats structure.
 * The vers field will be set to NFSSTATS_V1 by the caller.
 */
#define	NFSSTATS_V1	2
struct nfsstatsv1 {
	int		vers;	/* Set to version requested by caller. */
	uint64_t	attrcache_hits;
	uint64_t	attrcache_misses;
	uint64_t	lookupcache_hits;
	uint64_t	lookupcache_misses;
	uint64_t	direofcache_hits;
	uint64_t	direofcache_misses;
	uint64_t	accesscache_hits;
	uint64_t	accesscache_misses;
	uint64_t	biocache_reads;
	uint64_t	read_bios;
	uint64_t	read_physios;
	uint64_t	biocache_writes;
	uint64_t	write_bios;
	uint64_t	write_physios;
	uint64_t	biocache_readlinks;
	uint64_t	readlink_bios;
	uint64_t	biocache_readdirs;
	uint64_t	readdir_bios;
	uint64_t	rpccnt[NFSV42_NPROCS + 10];
	uint64_t	rpcretries;
	uint64_t	srvrpccnt[NFSV42_NOPS + NFSV4OP_FAKENOPS + 15];
	uint64_t	srvlayouts;
	uint64_t	cllayouts;
	uint64_t	rpcrequests;
	uint64_t	rpctimeouts;
	uint64_t	rpcunexpected;
	uint64_t	rpcinvalid;
	uint64_t	srvcache_inproghits;
	uint64_t	reserved_2;
	uint64_t	srvcache_nonidemdonehits;
	uint64_t	srvcache_misses;
	uint64_t	srvcache_tcppeak;
	int		srvcache_size;	/* Updated by atomic_xx_int(). */
	uint64_t	srvclients;
	uint64_t	srvopenowners;
	uint64_t	srvopens;
	uint64_t	srvlockowners;
	uint64_t	srvlocks;
	uint64_t	srvdelegates;
	uint64_t	cbrpccnt[NFSV42_CBNOPS + 10];
	uint64_t	clopenowners;
	uint64_t	clopens;
	uint64_t	cllockowners;
	uint64_t	cllocks;
	uint64_t	cldelegates;
	uint64_t	cllocalopenowners;
	uint64_t	cllocalopens;
	uint64_t	cllocallockowners;
	uint64_t	cllocallocks;
	uint64_t	srvstartcnt;
	uint64_t	srvdonecnt;
	uint64_t	srvbytes[NFSV42_NOPS + NFSV4OP_FAKENOPS + 15];
	uint64_t	srvops[NFSV42_NOPS + NFSV4OP_FAKENOPS + 15];
	struct bintime	srvduration[NFSV42_NOPS + NFSV4OP_FAKENOPS + 15];
	struct bintime	busyfrom;
	struct bintime	busytime;
};

/*
 * Newer stats structure.
 * The vers field will be set to NFSSTATS_OV1 by the caller.
 */
#define	NFSSTATS_OV1	1
struct nfsstatsov1 {
	int		vers;	/* Set to version requested by caller. */
	uint64_t	attrcache_hits;
	uint64_t	attrcache_misses;
	uint64_t	lookupcache_hits;
	uint64_t	lookupcache_misses;
	uint64_t	direofcache_hits;
	uint64_t	direofcache_misses;
	uint64_t	accesscache_hits;
	uint64_t	accesscache_misses;
	uint64_t	biocache_reads;
	uint64_t	read_bios;
	uint64_t	read_physios;
	uint64_t	biocache_writes;
	uint64_t	write_bios;
	uint64_t	write_physios;
	uint64_t	biocache_readlinks;
	uint64_t	readlink_bios;
	uint64_t	biocache_readdirs;
	uint64_t	readdir_bios;
	uint64_t	rpccnt[NFSV42_OLDNPROCS];
	uint64_t	rpcretries;
	uint64_t	srvrpccnt[NFSV42_PURENOPS + NFSV4OP_FAKENOPS];
	uint64_t	reserved_0;
	uint64_t	reserved_1;
	uint64_t	rpcrequests;
	uint64_t	rpctimeouts;
	uint64_t	rpcunexpected;
	uint64_t	rpcinvalid;
	uint64_t	srvcache_inproghits;
	uint64_t	reserved_2;
	uint64_t	srvcache_nonidemdonehits;
	uint64_t	srvcache_misses;
	uint64_t	srvcache_tcppeak;
	int		srvcache_size;	/* Updated by atomic_xx_int(). */
	uint64_t	srvclients;
	uint64_t	srvopenowners;
	uint64_t	srvopens;
	uint64_t	srvlockowners;
	uint64_t	srvlocks;
	uint64_t	srvdelegates;
	uint64_t	cbrpccnt[NFSV42_CBNOPS];
	uint64_t	clopenowners;
	uint64_t	clopens;
	uint64_t	cllockowners;
	uint64_t	cllocks;
	uint64_t	cldelegates;
	uint64_t	cllocalopenowners;
	uint64_t	cllocalopens;
	uint64_t	cllocallockowners;
	uint64_t	cllocallocks;
	uint64_t	srvstartcnt;
	uint64_t	srvdonecnt;
	uint64_t	srvbytes[NFSV42_PURENOPS + NFSV4OP_FAKENOPS];
	uint64_t	srvops[NFSV42_PURENOPS + NFSV4OP_FAKENOPS];
	struct bintime	srvduration[NFSV42_PURENOPS + NFSV4OP_FAKENOPS];
	struct bintime	busyfrom;
	struct bintime	busytime;
};

/*
 * Old stats structure.
 */
struct ext_nfsstats {
	int	attrcache_hits;
	int	attrcache_misses;
	int	lookupcache_hits;
	int	lookupcache_misses;
	int	direofcache_hits;
	int	direofcache_misses;
	int	accesscache_hits;
	int	accesscache_misses;
	int	biocache_reads;
	int	read_bios;
	int	read_physios;
	int	biocache_writes;
	int	write_bios;
	int	write_physios;
	int	biocache_readlinks;
	int	readlink_bios;
	int	biocache_readdirs;
	int	readdir_bios;
	int	rpccnt[NFSV4_NPROCS];
	int	rpcretries;
	int	srvrpccnt[NFSV4OP_NOPS + NFSV4OP_FAKENOPS];
	int	reserved_0;
	int	reserved_1;
	int	rpcrequests;
	int	rpctimeouts;
	int	rpcunexpected;
	int	rpcinvalid;
	int	srvcache_inproghits;
	int	reserved_2;
	int	srvcache_nonidemdonehits;
	int	srvcache_misses;
	int	srvcache_tcppeak;
	int	srvcache_size;
	int	srvclients;
	int	srvopenowners;
	int	srvopens;
	int	srvlockowners;
	int	srvlocks;
	int	srvdelegates;
	int	cbrpccnt[NFSV4OP_CBNOPS];
	int	clopenowners;
	int	clopens;
	int	cllockowners;
	int	cllocks;
	int	cldelegates;
	int	cllocalopenowners;
	int	cllocalopens;
	int	cllocallockowners;
	int	cllocallocks;
};

#ifdef _KERNEL
/*
 * Define NFS_NPROCS as NFSV4_NPROCS for the experimental kernel code.
 */
#ifndef	NFS_NPROCS
#define	NFS_NPROCS		NFSV4_NPROCS
#endif

#include <fs/nfs/nfskpiport.h>
#include <fs/nfs/nfsdport.h>
#include <fs/nfs/rpcv2.h>
#include <fs/nfs/nfsproto.h>
#include <fs/nfs/nfs.h>
#include <fs/nfs/nfsclstate.h>
#include <fs/nfs/nfs_var.h>
#include <fs/nfs/nfsm_subs.h>
#include <fs/nfs/nfsrvcache.h>
#include <fs/nfs/nfsrvstate.h>
#include <fs/nfs/xdr_subs.h>
#include <fs/nfs/nfscl.h>
#include <nfsclient/nfsargs.h>
#include <fs/nfsclient/nfsmount.h>

/*
 * Just to keep nfs_var.h happy.
 */
struct nfs_vattr {
	int	junk;
};

struct nfsvattr {
	struct vattr	na_vattr;
	nfsattrbit_t	na_suppattr;
	u_int64_t	na_mntonfileno;
	u_int64_t	na_filesid[2];
};

#define	na_type		na_vattr.va_type
#define	na_mode		na_vattr.va_mode
#define	na_nlink	na_vattr.va_nlink
#define	na_uid		na_vattr.va_uid
#define	na_gid		na_vattr.va_gid
#define	na_fsid		na_vattr.va_fsid
#define	na_fileid	na_vattr.va_fileid
#define	na_size		na_vattr.va_size
#define	na_blocksize	na_vattr.va_blocksize
#define	na_atime	na_vattr.va_atime
#define	na_mtime	na_vattr.va_mtime
#define	na_ctime	na_vattr.va_ctime
#define	na_btime	na_vattr.va_birthtime
#define	na_gen		na_vattr.va_gen
#define	na_flags	na_vattr.va_flags
#define	na_rdev		na_vattr.va_rdev
#define	na_bytes	na_vattr.va_bytes
#define	na_filerev	na_vattr.va_filerev
#define	na_vaflags	na_vattr.va_vaflags

#include <fs/nfsclient/nfsnode.h>

/*
 * This is the header structure used for the lists, etc. (It has the
 * above record in it.
 */
struct nfsrv_stablefirst {
	LIST_HEAD(, nfsrv_stable) nsf_head;	/* Head of nfsrv_stable list */
	time_t		nsf_eograce;	/* Time grace period ends */
	time_t		*nsf_bootvals;	/* Previous boottime values */
	struct file	*nsf_fp;	/* File table pointer */
	u_char		nsf_flags;	/* NFSNSF_ flags */
	struct nfsf_rec	nsf_rec;	/* and above first record */
};
#define	nsf_lease	nsf_rec.lease
#define	nsf_numboots	nsf_rec.numboots

/* NFSNSF_xxx flags */
#define	NFSNSF_UPDATEDONE	0x01
#define	NFSNSF_GRACEOVER	0x02
#define	NFSNSF_NEEDLOCK		0x04
#define	NFSNSF_EXPIREDCLIENT	0x08
#define	NFSNSF_NOOPENS		0x10
#define	NFSNSF_OK		0x20

/*
 * Maximum number of boot times allowed in record. Although there is
 * really no need for a fixed upper bound, this serves as a sanity check
 * for a corrupted file.
 */
#define	NFSNSF_MAXNUMBOOTS	10000

/*
 * This structure defines the other records in the file. The
 * nst_client array is actually the size of the client string name.
 */
struct nfst_rec {
	u_int16_t	len;
	u_char		flag;
	u_char		client[1];
};
/* and the values for flag */
#define	NFSNST_NEWSTATE	0x1
#define	NFSNST_REVOKE		0x2
#define	NFSNST_GOTSTATE		0x4
#define	NFSNST_RECLAIMED	0x8

/*
 * This structure is linked onto nfsrv_stablefirst for the duration of
 * reclaim.
 */
struct nfsrv_stable {
	LIST_ENTRY(nfsrv_stable) nst_list;
	struct nfsclient	*nst_clp;
	struct nfst_rec		nst_rec;
};
#define	nst_timestamp	nst_rec.timestamp
#define	nst_len		nst_rec.len
#define	nst_flag	nst_rec.flag
#define	nst_client	nst_rec.client

/*
 * At some point the server will run out of kernel storage for
 * state structures. For FreeBSD5.2, this results in a panic
 * kmem_map is full. It happens at well over 1000000 opens plus
 * locks on a PIII-800 with 256Mbytes, so that is where I've set
 * the limit. If your server panics due to too many opens/locks,
 * decrease the size of NFSRV_V4STATELIMIT. If you find the server
 * returning NFS4ERR_RESOURCE a lot and have lots of memory, try
 * increasing it.
 */
#define	NFSRV_V4STATELIMIT	500000	/* Max # of Opens + Locks */

/*
 * The type required differs with BSDen (just the second arg).
 */
void nfsrvd_rcv(struct socket *, void *, int);

/*
 * Macros for handling socket addresses. (Hopefully this makes the code
 * more portable, since I've noticed some 'BSD don't have sockaddrs in
 * mbufs any more.)
 */
#define	NFSSOCKADDR(a, t)	((t)(a))
#define	NFSSOCKADDRSIZE(a, s)		((a)->sa_len = (s))

/*
 * These should be defined as a process or thread structure, as required
 * for signal handling, etc.
 */
#define	NFSNEWCRED(c)		(crdup(c))
#define	NFSPROCCRED(p)		((p)->td_ucred)
#define	NFSFREECRED(c)		(crfree(c))
#define	NFSUIOPROC(u, p)	((u)->uio_td = NULL)
#define	NFSPROCP(p)		((p)->td_proc)

/*
 * Define these so that cn_hash and its length is ignored.
 */
#define	NFSCNHASHZERO(c)
#define	NFSCNHASH(c, v)
#define	NCHNAMLEN	9999999

/*
 * Handle SMP stuff:
 */
#define	NFSSTATESPINLOCK	extern struct mtx nfs_state_mutex
#define	NFSLOCKSTATE()		mtx_lock(&nfs_state_mutex)
#define	NFSUNLOCKSTATE()	mtx_unlock(&nfs_state_mutex)
#define	NFSSTATEMUTEXPTR	(&nfs_state_mutex)
#define	NFSREQSPINLOCK		extern struct mtx nfs_req_mutex
#define	NFSLOCKREQ()		mtx_lock(&nfs_req_mutex)
#define	NFSUNLOCKREQ()		mtx_unlock(&nfs_req_mutex)
#define	NFSSOCKMUTEX		extern struct mtx nfs_slock_mutex
#define	NFSSOCKMUTEXPTR		(&nfs_slock_mutex)
#define	NFSLOCKSOCK()		mtx_lock(&nfs_slock_mutex)
#define	NFSUNLOCKSOCK()		mtx_unlock(&nfs_slock_mutex)
#define	NFSNAMEIDMUTEX		extern struct mtx nfs_nameid_mutex
#define	NFSNAMEIDMUTEXPTR	(&nfs_nameid_mutex)
#define	NFSLOCKNAMEID()		mtx_lock(&nfs_nameid_mutex)
#define	NFSUNLOCKNAMEID()	mtx_unlock(&nfs_nameid_mutex)
#define	NFSNAMEIDREQUIRED()	mtx_assert(&nfs_nameid_mutex, MA_OWNED)
#define	NFSCLSTATEMUTEX		extern struct mtx nfs_clstate_mutex
#define	NFSCLSTATEMUTEXPTR	(&nfs_clstate_mutex)
#define	NFSLOCKCLSTATE()	mtx_lock(&nfs_clstate_mutex)
#define	NFSUNLOCKCLSTATE()	mtx_unlock(&nfs_clstate_mutex)
#define	NFSDLOCKMUTEX		extern struct mtx newnfsd_mtx
#define	NFSDLOCKMUTEXPTR	(&newnfsd_mtx)
#define	NFSD_LOCK()		mtx_lock(&newnfsd_mtx)
#define	NFSD_UNLOCK()		mtx_unlock(&newnfsd_mtx)
#define	NFSD_LOCK_ASSERT()	mtx_assert(&newnfsd_mtx, MA_OWNED)
#define	NFSD_UNLOCK_ASSERT()	mtx_assert(&newnfsd_mtx, MA_NOTOWNED)
#define	NFSV4ROOTLOCKMUTEX	extern struct mtx nfs_v4root_mutex
#define	NFSV4ROOTLOCKMUTEXPTR	(&nfs_v4root_mutex)
#define	NFSLOCKV4ROOTMUTEX()	mtx_lock(&nfs_v4root_mutex)
#define	NFSUNLOCKV4ROOTMUTEX()	mtx_unlock(&nfs_v4root_mutex)
#define	NFSLOCKNODE(n)		mtx_lock(&((n)->n_mtx))
#define	NFSUNLOCKNODE(n)	mtx_unlock(&((n)->n_mtx))
#define	NFSASSERTNODE(n)	mtx_assert(&((n)->n_mtx), MA_OWNED)
#define	NFSLOCKMNT(m)		mtx_lock(&((m)->nm_mtx))
#define	NFSUNLOCKMNT(m)		mtx_unlock(&((m)->nm_mtx))
#define	NFSLOCKIOD()		mtx_lock(&ncl_iod_mutex)
#define	NFSUNLOCKIOD()		mtx_unlock(&ncl_iod_mutex)
#define	NFSASSERTIOD()		mtx_assert(&ncl_iod_mutex, MA_OWNED)
#define	NFSLOCKREQUEST(r)	mtx_lock(&((r)->r_mtx))
#define	NFSUNLOCKREQUEST(r)	mtx_unlock(&((r)->r_mtx))
#define	NFSLOCKSOCKREQ(r)	mtx_lock(&((r)->nr_mtx))
#define	NFSUNLOCKSOCKREQ(r)	mtx_unlock(&((r)->nr_mtx))
#define	NFSLOCKDS(d)		mtx_lock(&((d)->nfsclds_mtx))
#define	NFSUNLOCKDS(d)		mtx_unlock(&((d)->nfsclds_mtx))
#define	NFSSESSIONMUTEXPTR(s)	(&((s)->mtx))
#define	NFSLOCKSESSION(s)	mtx_lock(&((s)->mtx))
#define	NFSUNLOCKSESSION(s)	mtx_unlock(&((s)->mtx))
#define	NFSLAYOUTMUTEXPTR(l)	(&((l)->mtx))
#define	NFSLOCKLAYOUT(l)	mtx_lock(&((l)->mtx))
#define	NFSUNLOCKLAYOUT(l)	mtx_unlock(&((l)->mtx))
#define	NFSDDSMUTEXPTR		(&nfsrv_dslock_mtx)
#define	NFSDDSLOCK()		mtx_lock(&nfsrv_dslock_mtx)
#define	NFSDDSUNLOCK()		mtx_unlock(&nfsrv_dslock_mtx)
#define	NFSDDONTLISTMUTEXPTR	(&nfsrv_dontlistlock_mtx)
#define	NFSDDONTLISTLOCK()	mtx_lock(&nfsrv_dontlistlock_mtx)
#define	NFSDDONTLISTUNLOCK()	mtx_unlock(&nfsrv_dontlistlock_mtx)
#define	NFSDRECALLMUTEXPTR	(&nfsrv_recalllock_mtx)
#define	NFSDRECALLLOCK()	mtx_lock(&nfsrv_recalllock_mtx)
#define	NFSDRECALLUNLOCK()	mtx_unlock(&nfsrv_recalllock_mtx)

/*
 * Use these macros to initialize/free a mutex.
 */
#define	NFSINITSOCKMUTEX(m)	mtx_init((m), "nfssock", NULL, MTX_DEF)
#define	NFSFREEMUTEX(m)		mtx_destroy((m))

int nfsmsleep(void *, void *, int, const char *, struct timespec *);

/*
 * And weird vm stuff in the nfs server.
 */
#define	PDIRUNLOCK	0x0
#define	MAX_COMMIT_COUNT	(1024 * 1024)

/*
 * Define these to handle the type of va_rdev.
 */
#define	NFSMAKEDEV(m, n)	makedev((m), (n))
#define	NFSMAJOR(d)		major(d)
#define	NFSMINOR(d)		minor(d)

/*
 * The vnode tag for nfsv4root.
 */
#define	VT_NFSV4ROOT		"nfsv4root"

/*
 * Define whatever it takes to do a vn_rdwr().
 */
#define	NFSD_RDWR(r, v, b, l, o, s, i, c, a, p) \
	vn_rdwr((r), (v), (b), (l), (o), (s), (i), (c), NULL, (a), (p))

/*
 * Macros for handling memory for different BSDen.
 * NFSBCOPY(src, dst, len) - copies len bytes, non-overlapping
 * NFSOVBCOPY(src, dst, len) - ditto, but data areas might overlap
 * NFSBCMP(cp1, cp2, len) - compare len bytes, return 0 if same
 * NFSBZERO(cp, len) - set len bytes to 0x0
 */
#define	NFSBCOPY(s, d, l)	bcopy((s), (d), (l))
#define	NFSOVBCOPY(s, d, l)	ovbcopy((s), (d), (l))
#define	NFSBCMP(s, d, l)	bcmp((s), (d), (l))
#define	NFSBZERO(s, l)		bzero((s), (l))

/*
 * Some queue.h files don't have these dfined in them.
 */
#ifndef LIST_END
#define	LIST_END(head)		NULL
#define	SLIST_END(head)		NULL
#define	TAILQ_END(head)		NULL
#endif

/*
 * This must be defined to be a global variable that increments once
 * per second, but never stops or goes backwards, even when a "date"
 * command changes the TOD clock. It is used for delta times for
 * leases, etc.
 */
#define	NFSD_MONOSEC		time_uptime

/*
 * Declare the malloc types.
 */
MALLOC_DECLARE(M_NEWNFSRVCACHE);
MALLOC_DECLARE(M_NEWNFSDCLIENT);
MALLOC_DECLARE(M_NEWNFSDSTATE);
MALLOC_DECLARE(M_NEWNFSDLOCK);
MALLOC_DECLARE(M_NEWNFSDLOCKFILE);
MALLOC_DECLARE(M_NEWNFSSTRING);
MALLOC_DECLARE(M_NEWNFSUSERGROUP);
MALLOC_DECLARE(M_NEWNFSDREQ);
MALLOC_DECLARE(M_NEWNFSFH);
MALLOC_DECLARE(M_NEWNFSCLOWNER);
MALLOC_DECLARE(M_NEWNFSCLOPEN);
MALLOC_DECLARE(M_NEWNFSCLDELEG);
MALLOC_DECLARE(M_NEWNFSCLCLIENT);
MALLOC_DECLARE(M_NEWNFSCLLOCKOWNER);
MALLOC_DECLARE(M_NEWNFSCLLOCK);
MALLOC_DECLARE(M_NEWNFSDIROFF);
MALLOC_DECLARE(M_NEWNFSV4NODE);
MALLOC_DECLARE(M_NEWNFSMNT);
MALLOC_DECLARE(M_NEWNFSDROLLBACK);
MALLOC_DECLARE(M_NEWNFSLAYOUT);
MALLOC_DECLARE(M_NEWNFSFLAYOUT);
MALLOC_DECLARE(M_NEWNFSDEVINFO);
MALLOC_DECLARE(M_NEWNFSSOCKREQ);
MALLOC_DECLARE(M_NEWNFSCLDS);
MALLOC_DECLARE(M_NEWNFSLAYRECALL);
MALLOC_DECLARE(M_NEWNFSDSESSION);
#define	M_NFSRVCACHE	M_NEWNFSRVCACHE
#define	M_NFSDCLIENT	M_NEWNFSDCLIENT
#define	M_NFSDSTATE	M_NEWNFSDSTATE
#define	M_NFSDLOCK	M_NEWNFSDLOCK
#define	M_NFSDLOCKFILE	M_NEWNFSDLOCKFILE
#define	M_NFSSTRING	M_NEWNFSSTRING
#define	M_NFSUSERGROUP	M_NEWNFSUSERGROUP
#define	M_NFSDREQ	M_NEWNFSDREQ
#define	M_NFSFH		M_NEWNFSFH
#define	M_NFSCLOWNER	M_NEWNFSCLOWNER
#define	M_NFSCLOPEN	M_NEWNFSCLOPEN
#define	M_NFSCLDELEG	M_NEWNFSCLDELEG
#define	M_NFSCLCLIENT	M_NEWNFSCLCLIENT
#define	M_NFSCLLOCKOWNER M_NEWNFSCLLOCKOWNER
#define	M_NFSCLLOCK	M_NEWNFSCLLOCK
#define	M_NFSDIROFF	M_NEWNFSDIROFF
#define	M_NFSV4NODE	M_NEWNFSV4NODE
#define	M_NFSDROLLBACK	M_NEWNFSDROLLBACK
#define	M_NFSLAYOUT	M_NEWNFSLAYOUT
#define	M_NFSFLAYOUT	M_NEWNFSFLAYOUT
#define	M_NFSDEVINFO	M_NEWNFSDEVINFO
#define	M_NFSSOCKREQ	M_NEWNFSSOCKREQ
#define	M_NFSCLDS	M_NEWNFSCLDS
#define	M_NFSLAYRECALL	M_NEWNFSLAYRECALL
#define	M_NFSDSESSION	M_NEWNFSDSESSION

#define	NFSINT_SIGMASK(set) 						\
	(SIGISMEMBER(set, SIGINT) || SIGISMEMBER(set, SIGTERM) ||	\
	 SIGISMEMBER(set, SIGHUP) || SIGISMEMBER(set, SIGKILL) ||	\
	 SIGISMEMBER(set, SIGQUIT))

/*
 * Convert a quota block count to byte count.
 */
#define	NFSQUOTABLKTOBYTE(q, b)	(q) *= (b)

/*
 * Define this as the largest file size supported. (It should probably
 * be available via a VFS_xxx Op, but it isn't.
 */
#define	NFSRV_MAXFILESIZE	((u_int64_t)0x800000000000)

/*
 * Set this macro to index() or strchr(), whichever is supported.
 */
#define	STRCHR(s, c)		strchr((s), (c))

/*
 * Set the n_time in the client write rpc, as required.
 */
#define	NFSWRITERPC_SETTIME(w, n, a, v4)				\
	do {								\
		if (w) {						\
			NFSLOCKNODE(n);					\
			(n)->n_mtime = (a)->na_mtime;			\
			if (v4)						\
				(n)->n_change = (a)->na_filerev;	\
			NFSUNLOCKNODE(n);				\
		}							\
	} while (0)

/*
 * Fake value, just to make the client work.
 */
#define	NFS_LATTR_NOSHRINK	1

/*
 * Prototypes for functions where the arguments vary for different ports.
 */
int nfscl_loadattrcache(struct vnode **, struct nfsvattr *, void *, int, int);
int newnfs_realign(struct mbuf **, int);
bool ncl_pager_setsize(struct vnode *vp, u_quad_t *nsizep);
void ncl_copy_vattr(struct vattr *dst, struct vattr *src);

/*
 * If the port runs on an SMP box that can enforce Atomic ops with low
 * overheads, define these as atomic increments/decrements. If not,
 * don't worry about it, since these are used for stats that can be
 * "out by one" without disastrous consequences.
 */
#define	NFSINCRGLOBAL(a)	((a)++)
#define	NFSDECRGLOBAL(a)	((a)--)

/*
 * Assorted funky stuff to make things work under Darwin8.
 */
/*
 * These macros checks for a field in vattr being set.
 */
#define	NFSATTRISSET(t, v, a)	((v)->a != (t)VNOVAL)
#define	NFSATTRISSETTIME(v, a)	((v)->a.tv_sec != VNOVAL)

/*
 * Manipulate mount flags.
 */
#define	NFSSTA_HASWRITEVERF	0x00040000  /* Has write verifier */
#define	NFSSTA_GOTFSINFO	0x00100000  /* Got the fsinfo */
#define	NFSSTA_OPENMODE		0x00200000  /* Must use correct open mode */
#define	NFSSTA_FLEXFILE		0x00800000  /* Use Flex File Layout */
#define	NFSSTA_NOLAYOUTCOMMIT	0x04000000  /* Don't do LayoutCommit */
#define	NFSSTA_SESSPERSIST	0x08000000  /* Has a persistent session */
#define	NFSSTA_TIMEO		0x10000000  /* Experiencing a timeout */
#define	NFSSTA_LOCKTIMEO	0x20000000  /* Experiencing a lockd timeout */
#define	NFSSTA_HASSETFSID	0x40000000  /* Has set the fsid */
#define	NFSSTA_PNFS		0x80000000  /* pNFS is enabled */

#define	NFSHASNFSV3(n)		((n)->nm_flag & NFSMNT_NFSV3)
#define	NFSHASNFSV4(n)		((n)->nm_flag & NFSMNT_NFSV4)
#define	NFSHASNFSV4N(n)		((n)->nm_minorvers > 0)
#define	NFSHASNFSV3OR4(n)	((n)->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4))
#define	NFSHASGOTFSINFO(n)	((n)->nm_state & NFSSTA_GOTFSINFO)
#define	NFSHASHASSETFSID(n)	((n)->nm_state & NFSSTA_HASSETFSID)
#define	NFSHASSTRICT3530(n)	((n)->nm_flag & NFSMNT_STRICT3530)
#define	NFSHASWRITEVERF(n)	((n)->nm_state & NFSSTA_HASWRITEVERF)
#define	NFSHASINT(n)		((n)->nm_flag & NFSMNT_INT)
#define	NFSHASSOFT(n)		((n)->nm_flag & NFSMNT_SOFT)
#define	NFSHASINTORSOFT(n)	((n)->nm_flag & (NFSMNT_INT | NFSMNT_SOFT))
#define	NFSHASDUMBTIMR(n)	((n)->nm_flag & NFSMNT_DUMBTIMR)
#define	NFSHASNOCONN(n)		((n)->nm_flag & NFSMNT_MNTD)
#define	NFSHASKERB(n)		((n)->nm_flag & NFSMNT_KERB)
#define	NFSHASALLGSSNAME(n)	((n)->nm_flag & NFSMNT_ALLGSSNAME)
#define	NFSHASINTEGRITY(n)	((n)->nm_flag & NFSMNT_INTEGRITY)
#define	NFSHASPRIVACY(n)	((n)->nm_flag & NFSMNT_PRIVACY)
#define	NFSSETWRITEVERF(n)	((n)->nm_state |= NFSSTA_HASWRITEVERF)
#define	NFSSETHASSETFSID(n)	((n)->nm_state |= NFSSTA_HASSETFSID)
#define	NFSHASPNFSOPT(n)	((n)->nm_flag & NFSMNT_PNFS)
#define	NFSHASNOLAYOUTCOMMIT(n)	((n)->nm_state & NFSSTA_NOLAYOUTCOMMIT)
#define	NFSHASSESSPERSIST(n)	((n)->nm_state & NFSSTA_SESSPERSIST)
#define	NFSHASPNFS(n)		((n)->nm_state & NFSSTA_PNFS)
#define	NFSHASFLEXFILE(n)	((n)->nm_state & NFSSTA_FLEXFILE)
#define	NFSHASOPENMODE(n)	((n)->nm_state & NFSSTA_OPENMODE)
#define	NFSHASONEOPENOWN(n)	(((n)->nm_flag & NFSMNT_ONEOPENOWN) != 0 &&	\
				    (n)->nm_minorvers > 0)
#define	NFSHASTLS(n)		(((n)->nm_newflag & NFSMNT_TLS) != 0)
#define	NFSHASSYSKRB5(n)	(((n)->nm_newflag & NFSMNT_SYSKRB5) != 0)

/*
 * Set boottime.
 */
#define	NFSSETBOOTTIME(b)	(getboottime(&b))

/*
 * The size of directory blocks in the buffer cache.
 * MUST BE in the range of PAGE_SIZE <= NFS_DIRBLKSIZ <= MAXBSIZE!!
 */
#define	NFS_DIRBLKSIZ	(16 * DIRBLKSIZ) /* Must be a multiple of DIRBLKSIZ */

/*
 * Define these macros to access mnt_flag fields.
 */
#define	NFSMNT_RDONLY(m)	((m)->mnt_flag & MNT_RDONLY)
#endif	/* _KERNEL */

/*
 * Define a structure similar to ufs_args for use in exporting the V4 root.
 */
struct nfsex_args {
	char	*fspec;
	struct export_args	export;
};

struct nfsex_oldargs {
	char	*fspec;
	struct o2export_args	export;
};

/*
 * These export flags should be defined, but there are no bits left.
 * Maybe a separate mnt_exflag field could be added or the mnt_flag
 * field increased to 64 bits?
 */
#ifndef	MNT_EXSTRICTACCESS
#define	MNT_EXSTRICTACCESS	0x0
#endif
#ifndef MNT_EXV4ONLY
#define	MNT_EXV4ONLY		0x0
#endif

#ifdef _KERNEL
/*
 * Define this to invalidate the attribute cache for the nfs node.
 */
#define	NFSINVALATTRCACHE(n)	((n)->n_attrstamp = 0)

/* Used for FreeBSD only */
void nfsd_mntinit(void);

/*
 * Define these for vnode lock/unlock ops.
 *
 * These are good abstractions to macro out, so that they can be added to
 * later, for debugging or stats, etc.
 */
#define	NFSVOPLOCK(v, f)	vn_lock((v), (f))
#define	NFSVOPUNLOCK(v)		VOP_UNLOCK((v))
#define	NFSVOPISLOCKED(v)	VOP_ISLOCKED((v))

/*
 * Define ncl_hash().
 */
#define	ncl_hash(f, l)	(fnv_32_buf((f), (l), FNV1_32_INIT))

int newnfs_iosize(struct nfsmount *);

int newnfs_vncmpf(struct vnode *, void *);

#ifndef NFS_MINDIRATTRTIMO
#define	NFS_MINDIRATTRTIMO 3		/* VDIR attrib cache timeout in sec */
#endif
#ifndef NFS_MAXDIRATTRTIMO
#define	NFS_MAXDIRATTRTIMO 60
#endif

/*
 * Nfs outstanding request list element
 */
struct nfsreq {
	TAILQ_ENTRY(nfsreq) r_chain;
	u_int32_t	r_flags;	/* flags on request, see below */
	struct nfsmount *r_nmp;		/* Client mnt ptr */
	struct mtx	r_mtx;		/* Mutex lock for this structure */
};

#ifndef NFS_MAXBSIZE
#define	NFS_MAXBSIZE	(maxbcachebuf)
#endif

/*
 * This macro checks to see if issuing of delegations is allowed for this
 * vnode.
 */
#ifdef VV_DISABLEDELEG
#define	NFSVNO_DELEGOK(v)						\
	((v) == NULL || ((v)->v_vflag & VV_DISABLEDELEG) == 0)
#else
#define	NFSVNO_DELEGOK(v)	(1)
#endif

/*
 * Name used by getnewvnode() to describe filesystem, "nfs".
 * For performance reasons it is useful to have the same string
 * used in both places that call getnewvnode().
 */
extern const char nfs_vnode_tag[];

/*
 * Check for the errors that indicate a DS should be disabled.
 * ENXIO indicates that the krpc cannot do an RPC on the DS.
 * EIO is returned by the RPC as an indication of I/O problems on the
 * server.
 * Are there other fatal errors?
 */
#define	nfsds_failerr(e)	((e) == ENXIO || (e) == EIO)

/*
 * Get a pointer to the MDS session, which is always the first element
 * in the list.
 * This macro can only be safely used when the NFSLOCKMNT() lock is held.
 * The inline function can be used when the lock isn't held.
 */
#define	NFSMNT_MDSSESSION(m)	(&(TAILQ_FIRST(&((m)->nm_sess))->nfsclds_sess))

static __inline struct nfsclsession *
nfsmnt_mdssession(struct nfsmount *nmp)
{
	struct nfsclsession *tsep;

	tsep = NULL;
	mtx_lock(&nmp->nm_mtx);
	if (TAILQ_FIRST(&nmp->nm_sess) != NULL)
		tsep = NFSMNT_MDSSESSION(nmp);
	mtx_unlock(&nmp->nm_mtx);
	return (tsep);
}

#endif	/* _KERNEL */

#endif	/* _NFS_NFSPORT_H */