/*-
 * 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

/* Do a NFSv4 Openattr. */
#define NFSPROC_OPENATTR        70

/* Do a NFSv4.2 Clone. */
#define NFSPROC_CLONE           71

/*
 * Must be defined as one higher than the last NFSv4.2 Proc# above.
 */
#define NFSV42_NPROCS           72

/* 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 + 8];
        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
#define na_bsdflags     na_vattr.va_bsdflags

#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))

/*
 * 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 vnode *vp, 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)--)

/*
 * 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_CASEINSENSITIVE  0x00400000  /* Case insensitive fs */
#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 NFSHASCASEINSENSITIVE(n) ((n)->nm_state & NFSSTA_CASEINSENSITIVE)
#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 ||        \
         (vn_irflag_read(v) & VIRF_NAMEDATTR) == 0)
#else
#define NFSVNO_DELEGOK(v)                                               \
        ((v) == NULL || (vn_irflag_read(v) & VIRF_NAMEDATTR) == 0)
#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 */