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/*

 * Copyright (c) 1989, 1993

 *      The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Rick Macklem at The University of Guelph.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *      @(#)nfs.h       8.1 (Berkeley) 6/10/93

 * $Id: nfs.h,v 1.2 2001-09-27 12:01:56 chris Exp $

 */

#ifndef _NFS_NFS_H_

#define _NFS_NFS_H_

#include <nfs/rpcv2.h>

/*

 * Tunable constants for nfs

 */

#define NFS_MAXIOVEC    34

#define NFS_TICKINTVL   5               /* Desired time for a tick (msec) */

#define NFS_HZ          (hz / nfs_ticks) /* Ticks/sec */

#define NFS_TIMEO       (1 * NFS_HZ)    /* Default timeout = 1 second */

#define NFS_MINTIMEO    (1 * NFS_HZ)    /* Min timeout to use */

#define NFS_MAXTIMEO    (60 * NFS_HZ)   /* Max timeout to backoff to */

#define NFS_MINIDEMTIMEO (5 * NFS_HZ)   /* Min timeout for non-idempotent ops*/

#define NFS_MAXREXMIT   100             /* Stop counting after this many */

#define NFS_MAXWINDOW   1024            /* Max number of outstanding requests */

#define NFS_RETRANS     10              /* Num of retrans for soft mounts */

#define NFS_MAXGRPS     16              /* Max. size of groups list */

#ifndef NFS_MINATTRTIMO

#define NFS_MINATTRTIMO 5               /* Attribute cache timeout in sec */

#endif

#ifndef NFS_MAXATTRTIMO

#define NFS_MAXATTRTIMO 60

#endif

#define NFS_WSIZE       8192            /* Def. write data size <= 8192 */

#define NFS_RSIZE       8192            /* Def. read data size <= 8192 */

#define NFS_READDIRSIZE 8192            /* Def. readdir size */

#define NFS_DEFRAHEAD   1               /* Def. read ahead # blocks */

#define NFS_MAXRAHEAD   4               /* Max. read ahead # blocks */

#define NFS_MAXUIDHASH  64              /* Max. # of hashed uid entries/mp */

#define NFS_MAXASYNCDAEMON      20      /* Max. number async_daemons runnable */

#define NFS_MAXGATHERDELAY      100     /* Max. write gather delay (msec) */

#ifndef NFS_GATHERDELAY

#define NFS_GATHERDELAY         10      /* Default write gather delay (msec) */

#endif

#define NFS_DIRBLKSIZ   4096            /* Must be a multiple of DIRBLKSIZ */

/*

 * Oddballs

 */

#define NMOD(a)         ((a) % nfs_asyncdaemons)

#define NFS_CMPFH(n, f, s) \

        ((n)->n_fhsize == (s) && !bcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s)))

#define NFS_ISV3(v)     (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)

#define NFS_SRVMAXDATA(n) \

                (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \

                 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)

/*

 * XXX

 * sys/buf.h should be edited to change B_APPENDWRITE --> B_NEEDCOMMIT, but

 * until then...

 * Same goes for sys/malloc.h, which needs M_NFSDIROFF,

 * M_NFSRVDESC and M_NFSBIGFH added.

 * The VA_EXCLUSIVE flag should be added for va_vaflags and set for an

 * exclusive create.

 * The B_INVAFTERWRITE flag should be set to whatever is required by the

 * buffer cache code to say "Invalidate the block after it is written back".

 */

#ifndef B_NEEDCOMMIT

#define B_NEEDCOMMIT    B_APPENDWRITE

#endif

#ifndef M_NFSRVDESC

#define M_NFSRVDESC     M_TEMP

#endif

#ifndef M_NFSDIROFF

#define M_NFSDIROFF     M_TEMP

#endif

#ifndef M_NFSBIGFH

#define M_NFSBIGFH      M_TEMP

#endif

#ifndef VA_EXCLUSIVE

#define VA_EXCLUSIVE    0

#endif

#ifdef __FreeBSD__

#define B_INVAFTERWRITE B_NOCACHE

#else

#define B_INVAFTERWRITE B_INVAL

#endif

/*

 * These ifdefs try to handle the differences between the various 4.4BSD-Lite

 * based vfs interfaces.

 * btw: NetBSD-current does have a VOP_LEASDE(), but I don't know how to

 * differentiate between NetBSD-1.0 and NetBSD-current, so..

 * I also don't know about BSDi's 2.0 release.

 */

#if !defined(HAS_VOPLEASE) && !defined(__FreeBSD__) && !defined(__NetBSD__)

#define HAS_VOPLEASE    1

#endif

#if !defined(HAS_VOPREVOKE) && !defined(__FreeBSD__) && !defined(__NetBSD__)

#define HAS_VOPREVOKE   1

#endif

/*

 * The IO_METASYNC flag should be implemented for local file systems.

 * (Until then, it is nothin at all.)

 */

#ifndef IO_METASYNC

#define IO_METASYNC     0

#endif

/*

 * Set the attribute timeout based on how recently the file has been modified.

 */

#define NFS_ATTRTIMEO(np) \

        ((((np)->n_flag & NMODIFIED) || \

         (time.tv_sec - (np)->n_mtime) / 10 < NFS_MINATTRTIMO) ? NFS_MINATTRTIMO : \

         ((time.tv_sec - (np)->n_mtime) / 10 > NFS_MAXATTRTIMO ? NFS_MAXATTRTIMO : \

          (time.tv_sec - (np)->n_mtime) / 10))

/*

 * Expected allocation sizes for major data structures. If the actual size

 * of the structure exceeds these sizes, then malloc() will be allocating

 * almost twice the memory required. This is used in nfs_init() to warn

 * the sysadmin that the size of a structure should be reduced.

 * (These sizes are always a power of 2. If the kernel malloc() changes

 *  to one that does not allocate space in powers of 2 size, then this all

 *  becomes bunk!)

 */

#define NFS_NODEALLOC   256

#define NFS_MNTALLOC    512

#define NFS_SVCALLOC    256

#define NFS_UIDALLOC    128

/*

 * Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs

 * should ever try and use it.

 */

struct nfsd_args {

        int     sock;           /* Socket to serve */

        caddr_t name;           /* Client address for connection based sockets */

        int     namelen;        /* Length of name */

};

struct nfsd_srvargs {

        struct nfsd     *nsd_nfsd;      /* Pointer to in kernel nfsd struct */

        uid_t           nsd_uid;        /* Effective uid mapped to cred */

        u_long          nsd_haddr;      /* Ip address of client */

        struct ucred    nsd_cr;         /* Cred. uid maps to */

        int             nsd_authlen;    /* Length of auth string (ret) */

        u_char          *nsd_authstr;   /* Auth string (ret) */

        int             nsd_verflen;    /* and the verfier */

        u_char          *nsd_verfstr;

        struct timeval  nsd_timestamp;  /* timestamp from verifier */

        u_long          nsd_ttl;        /* credential ttl (sec) */

        NFSKERBKEY_T    nsd_key;        /* Session key */

};

struct nfsd_cargs {

        char            *ncd_dirp;      /* Mount dir path */

        uid_t           ncd_authuid;    /* Effective uid */

        int             ncd_authtype;   /* Type of authenticator */

        int             ncd_authlen;    /* Length of authenticator string */

        u_char          *ncd_authstr;   /* Authenticator string */

        int             ncd_verflen;    /* and the verifier */

        u_char          *ncd_verfstr;

        NFSKERBKEY_T    ncd_key;        /* Session key */

};

/*

 * Stats structure

 */

struct nfsstats {

        int     attrcache_hits;

        int     attrcache_misses;

        int     lookupcache_hits;

        int     lookupcache_misses;

        int     direofcache_hits;

        int     direofcache_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[NFS_NPROCS];

        int     rpcretries;

        int     srvrpccnt[NFS_NPROCS];

        int     srvrpc_errs;

        int     srv_errs;

        int     rpcrequests;

        int     rpctimeouts;

        int     rpcunexpected;

        int     rpcinvalid;

        int     srvcache_inproghits;

        int     srvcache_idemdonehits;

        int     srvcache_nonidemdonehits;

        int     srvcache_misses;

        int     srvnqnfs_leases;

        int     srvnqnfs_maxleases;

        int     srvnqnfs_getleases;

        int     srvvop_writes;

};

/*

 * Flags for nfssvc() system call.

 */

#define NFSSVC_BIOD     0x002

#define NFSSVC_NFSD     0x004

#define NFSSVC_ADDSOCK  0x008

#define NFSSVC_AUTHIN   0x010

#define NFSSVC_GOTAUTH  0x040

#define NFSSVC_AUTHINFAIL 0x080

#define NFSSVC_MNTD     0x100

/*

 * fs.nfs sysctl(3) identifiers

 */

#define NFS_NFSSTATS    1               /* struct: struct nfsstats */

#define NFS_NFSPRIVPORT 2               /* int: prohibit nfs to resvports */

#define FS_NFS_NAMES { \

                       { 0, 0 }, \

                       { "nfsstats", CTLTYPE_STRUCT }, \

                       { "nfsprivport", CTLTYPE_INT }, \

}

/*

 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.

 * What should be in this set is open to debate, but I believe that since

 * I/O system calls on ufs are never interrupted by signals the set should

 * be minimal. My reasoning is that many current programs that use signals

 * such as SIGALRM will not expect file I/O system calls to be interrupted

 * by them and break.

 */

#if defined(KERNEL) || defined(_KERNEL)

struct uio; struct buf; struct vattr; struct nameidata; /* XXX */

#define NFSINT_SIGMASK  (sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \

                         sigmask(SIGHUP)|sigmask(SIGQUIT))

/*

 * Socket errors ignored for connectionless sockets??

 * For now, ignore them all

 */

#define NFSIGNORE_SOERROR(s, e) \

                ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \

                ((s) & PR_CONNREQUIRED) == 0)

/*

 * Nfs outstanding request list element

 */

struct nfsreq {

        TAILQ_ENTRY(nfsreq) r_chain;

        struct mbuf     *r_mreq;

        struct mbuf     *r_mrep;

        struct mbuf     *r_md;

        caddr_t         r_dpos;

        struct nfsmount *r_nmp;

        struct vnode    *r_vp;

        u_long          r_xid;

        int             r_flags;        /* flags on request, see below */

        int             r_retry;        /* max retransmission count */

        int             r_rexmit;       /* current retrans count */

        int             r_timer;        /* tick counter on reply */

        int             r_procnum;      /* NFS procedure number */

        int             r_rtt;          /* RTT for rpc */

        struct proc     *r_procp;       /* Proc that did I/O system call */

};

/*

 * Queue head for nfsreq's

 */

extern TAILQ_HEAD(nfs_reqq, nfsreq) nfs_reqq;

/* Flag values for r_flags */

#define R_TIMING        0x01            /* timing request (in mntp) */

#define R_SENT          0x02            /* request has been sent */

#define R_SOFTTERM      0x04            /* soft mnt, too many retries */

#define R_INTR          0x08            /* intr mnt, signal pending */

#define R_SOCKERR       0x10            /* Fatal error on socket */

#define R_TPRINTFMSG    0x20            /* Did a tprintf msg. */

#define R_MUSTRESEND    0x40            /* Must resend request */

#define R_GETONEREP     0x80            /* Probe for one reply only */

/*

 * A list of nfssvc_sock structures is maintained with all the sockets

 * that require service by the nfsd.

 * The nfsuid structs hang off of the nfssvc_sock structs in both lru

 * and uid hash lists.

 */

#ifndef NFS_UIDHASHSIZ

#define NFS_UIDHASHSIZ  29      /* Tune the size of nfssvc_sock with this */

#endif

#define NUIDHASH(sock, uid) \

        (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ])

#ifndef NFS_WDELAYHASHSIZ

#define NFS_WDELAYHASHSIZ 16    /* and with this */

#endif

#define NWDELAYHASH(sock, f) \

        (&(sock)->ns_wdelayhashtbl[(*((u_long *)(f))) % NFS_WDELAYHASHSIZ])

#ifndef NFS_MUIDHASHSIZ

#define NFS_MUIDHASHSIZ 63      /* Tune the size of nfsmount with this */

#endif

#define NMUIDHASH(nmp, uid) \

        (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ])

#define NFSNOHASH(fhsum) \

        (&nfsnodehashtbl[(fhsum) & nfsnodehash])

/*

 * Network address hash list element

 */

union nethostaddr {

        u_long had_inetaddr;

        struct mbuf *had_nam;

};

struct nfsuid {

        TAILQ_ENTRY(nfsuid) nu_lru;     /* LRU chain */

        LIST_ENTRY(nfsuid) nu_hash;     /* Hash list */

        int             nu_flag;        /* Flags */

        union nethostaddr nu_haddr;     /* Host addr. for dgram sockets */

        struct ucred    nu_cr;          /* Cred uid mapped to */

        int             nu_expire;      /* Expiry time (sec) */

        struct timeval  nu_timestamp;   /* Kerb. timestamp */

        u_long          nu_nickname;    /* Nickname on server */

        NFSKERBKEY_T    nu_key;         /* and session key */

};

#define nu_inetaddr     nu_haddr.had_inetaddr

#define nu_nam          nu_haddr.had_nam

/* Bits for nu_flag */

#define NU_INETADDR     0x1

#define NU_NAM          0x2

#define NU_NETFAM(u)    (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO)

struct nfssvc_sock {

        TAILQ_ENTRY(nfssvc_sock) ns_chain;      /* List of all nfssvc_sock's */

        TAILQ_HEAD(, nfsuid) ns_uidlruhead;

        struct file     *ns_fp;

        struct socket   *ns_so;

        struct mbuf     *ns_nam;

        struct mbuf     *ns_raw;

        struct mbuf     *ns_rawend;

        struct mbuf     *ns_rec;

        struct mbuf     *ns_recend;

        struct mbuf     *ns_frag;

        int             ns_flag;

        int             ns_solock;

        int             ns_cc;

        int             ns_reclen;

        int             ns_numuids;

        u_long          ns_sref;

        LIST_HEAD(, nfsrv_descript) ns_tq;      /* Write gather lists */

        LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];

        LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ];

};

/* Bits for "ns_flag" */

#define SLP_VALID       0x01

#define SLP_DOREC       0x02

#define SLP_NEEDQ       0x04

#define SLP_DISCONN     0x08

#define SLP_GETSTREAM   0x10

#define SLP_LASTFRAG    0x20

#define SLP_ALLFLAGS    0xff

extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;

extern int nfssvc_sockhead_flag;

#define SLP_INIT        0x01

#define SLP_WANTINIT    0x02

/*

 * One of these structures is allocated for each nfsd.

 */

struct nfsd {

        TAILQ_ENTRY(nfsd) nfsd_chain;   /* List of all nfsd's */

        int             nfsd_flag;      /* NFSD_ flags */

        struct nfssvc_sock *nfsd_slp;   /* Current socket */

        int             nfsd_authlen;   /* Authenticator len */

        u_char          nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */

        int             nfsd_verflen;   /* and the Verifier */

        u_char          nfsd_verfstr[RPCVERF_MAXSIZ];

        struct proc     *nfsd_procp;    /* Proc ptr */

        struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */

};

/* Bits for "nfsd_flag" */

#define NFSD_WAITING    0x01

#define NFSD_REQINPROG  0x02

#define NFSD_NEEDAUTH   0x04

#define NFSD_AUTHFAIL   0x08

/*

 * This structure is used by the server for describing each request.

 * Some fields are used only when write request gathering is performed.

 */

struct nfsrv_descript {

        u_quad_t                nd_time;        /* Write deadline (usec) */

        off_t                   nd_off;         /* Start byte offset */

        off_t                   nd_eoff;        /* and end byte offset */

        LIST_ENTRY(nfsrv_descript) nd_hash;     /* Hash list */

        LIST_ENTRY(nfsrv_descript) nd_tq;               /* and timer list */

        LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */

        struct mbuf             *nd_mrep;       /* Request mbuf list */

        struct mbuf             *nd_md;         /* Current dissect mbuf */

        struct mbuf             *nd_mreq;       /* Reply mbuf list */

        struct mbuf             *nd_nam;        /* and socket addr */

        struct mbuf             *nd_nam2;       /* return socket addr */

        caddr_t                 nd_dpos;        /* Current dissect pos */

        int                     nd_procnum;     /* RPC # */

        int                     nd_stable;      /* storage type */

        int                     nd_flag;        /* nd_flag */

        int                     nd_len;         /* Length of this write */

        int                     nd_repstat;     /* Reply status */

        u_long                  nd_retxid;      /* Reply xid */

        u_long                  nd_duration;    /* Lease duration */

        struct timeval          nd_starttime;   /* Time RPC initiated */

        fhandle_t               nd_fh;          /* File handle */

        struct ucred            nd_cr;          /* Credentials */

};

/* Bits for "nd_flag" */

#define ND_READ         LEASE_READ

#define ND_WRITE        LEASE_WRITE

#define ND_CHECK        0x04

#define ND_LEASE        (ND_READ | ND_WRITE | ND_CHECK)

#define ND_NFSV3        0x08

#define ND_NQNFS        0x10

#define ND_KERBNICK     0x20

#define ND_KERBFULL     0x40

#define ND_KERBAUTH     (ND_KERBNICK | ND_KERBFULL)

extern TAILQ_HEAD(nfsd_head, nfsd) nfsd_head;

extern int nfsd_head_flag;

#define NFSD_CHECKSLP   0x01

/*

 * These macros compare nfsrv_descript structures.

 */

#define NFSW_CONTIG(o, n) \

                ((o)->nd_eoff >= (n)->nd_off && \

                 !bcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH))

#define NFSW_SAMECRED(o, n) \

        (((o)->nd_flag & ND_KERBAUTH) == ((n)->nd_flag & ND_KERBAUTH) && \

         !bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \

                sizeof (struct ucred)))

int     nfs_reply __P((struct nfsreq *));

int     nfs_getreq __P((struct nfsrv_descript *,struct nfsd *,int));

int     nfs_send __P((struct socket *,struct mbuf *,struct mbuf *,struct nfsreq *));

int     nfs_rephead __P((int,struct nfsrv_descript *,struct nfssvc_sock *,int,int,u_quad_t *,struct mbuf **,struct mbuf **,caddr_t *));

int     nfs_sndlock __P((int *,struct nfsreq *));

void    nfs_sndunlock __P((int *flagp));

int     nfs_disct __P((struct mbuf **,caddr_t *,int,int,caddr_t *));

int     nfs_vinvalbuf __P((struct vnode *,int,struct ucred *,struct proc *,int));

int     nfs_readrpc __P((struct vnode *,struct uio *,struct ucred *));

int     nfs_writerpc __P((struct vnode *,struct uio *,struct ucred *,int *,int *));

int     nfs_readdirrpc __P((register struct vnode *,struct uio *,struct ucred *));

int     nfs_asyncio __P((struct buf *,struct ucred *));

int     nfs_doio __P((struct buf *,struct ucred *,struct proc *));

int     nfs_readlinkrpc __P((struct vnode *,struct uio *,struct ucred *));

int     nfs_sigintr __P((struct nfsmount *,struct nfsreq *r,struct proc *));

int     nfs_readdirplusrpc __P((struct vnode *,register struct uio *,struct ucred *));

int     nfsm_disct __P((struct mbuf **,caddr_t *,int,int,caddr_t *));

void    nfsm_srvfattr __P((struct nfsrv_descript *,struct vattr *,struct nfs_fattr *));

void    nfsm_srvwcc __P((struct nfsrv_descript *,int,struct vattr *,int,struct vattr *,struct mbuf **,char **));

void    nfsm_srvpostopattr __P((struct nfsrv_descript *,int,struct vattr *,struct mbuf **,char **));

int     netaddr_match __P((int,union nethostaddr *,struct mbuf *));

int     nfs_request __P((struct vnode *,struct mbuf *,int,struct proc *,struct ucred *,struct mbuf **,struct mbuf **,caddr_t *));

int     nfs_loadattrcache __P((struct vnode **,struct mbuf **,caddr_t *,struct vattr *));

int     nfs_namei __P((struct nameidata *,fhandle_t *,int,struct nfssvc_sock *,struct mbuf *,struct mbuf **,caddr_t *,struct vnode **,struct proc *,int));

void    nfsm_adj __P((struct mbuf *,int,int));

int     nfsm_mbuftouio __P((struct mbuf **,struct uio *,int,caddr_t *));

void    nfsrv_initcache __P((void));

int     nfs_getauth __P((struct nfsmount *,struct nfsreq *,struct ucred *,char **,int *,char *,int *,NFSKERBKEY_T));

int     nfs_getnickauth __P((struct nfsmount *,struct ucred *,char **,int *,char *,int));

int     nfs_savenickauth __P((struct nfsmount *,struct ucred *,int,NFSKERBKEY_T,struct mbuf **,char **,struct mbuf *));

int     nfs_adv __P((struct mbuf **,caddr_t *,int,int));

void    nfs_nhinit __P((void));

void    nfs_timer __P((void*));

u_long nfs_hash __P((nfsfh_t *,int));

void    nfsrv_slpderef __P((struct nfssvc_sock *slp));

int     nfsrv_dorec __P((struct nfssvc_sock *,struct nfsd *,struct nfsrv_descript **));

void    nfsrv_cleancache __P((void));

int     nfsrv_getcache __P((struct nfsrv_descript *,struct nfssvc_sock *,struct mbuf **));

int     nfs_init __P((void));

void    nfsrv_updatecache __P((struct nfsrv_descript *,int,struct mbuf *));

int     nfs_connect __P((struct nfsmount *,struct nfsreq *));

void    nfs_disconnect __P((struct nfsmount *nmp));

int     nfs_getattrcache __P((struct vnode *,struct vattr *));

int     nfsm_strtmbuf __P((struct mbuf **,char **,char *,long));

int     nfs_bioread __P((struct vnode *,struct uio *,int,struct ucred *, int getpages));

int     nfsm_uiotombuf __P((struct uio *,struct mbuf **,int,caddr_t *));

void    nfsrv_init __P((int));

void    nfs_clearcommit __P((struct mount *));

int     nfsrv_errmap __P((struct nfsrv_descript *, int));

void    nfsrv_rcv __P((struct socket *so, caddr_t arg, int waitflag));

void    nfsrvw_sort __P((gid_t [],int));

void    nfsrv_setcred __P((struct ucred *,struct ucred *));

int     nfs_writebp __P((struct buf *,int));

int     nfsrv_object_create __P(( struct vnode * ));

void    nfsrv_wakenfsd __P((struct nfssvc_sock *slp));

int     nfsrv_writegather __P((struct nfsrv_descript **, struct nfssvc_sock *,

                               struct proc *, struct mbuf **));

int     nfs_fsinfo __P((struct nfsmount *, struct vnode *, struct ucred *,

                        struct proc *p));

int     nfsrv3_access __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                           struct proc *procp, struct mbuf **mrq));

int     nfsrv_commit __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                          struct proc *procp, struct mbuf **mrq));

int     nfsrv_create __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                          struct proc *procp, struct mbuf **mrq));

int     nfsrv_fhtovp __P((fhandle_t *,int,struct vnode **,

                        struct ucred *,struct nfssvc_sock *,struct mbuf *,

                        int *,int));

int     nfsrv_fsinfo __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                          struct proc *procp, struct mbuf **mrq));

int     nfsrv_getattr __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                           struct proc *procp, struct mbuf **mrq));

int     nfsrv_link __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                        struct proc *procp, struct mbuf **mrq));

int     nfsrv_lookup __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                          struct proc *procp, struct mbuf **mrq));

int     nfsrv_mkdir __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                         struct proc *procp, struct mbuf **mrq));

int     nfsrv_mknod __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                         struct proc *procp, struct mbuf **mrq));

int     nfsrv_noop __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                        struct proc *procp, struct mbuf **mrq));

int     nfsrv_null __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                        struct proc *procp, struct mbuf **mrq));

int     nfsrv_pathconf __P((struct nfsrv_descript *nfsd,

                            struct nfssvc_sock *slp, struct proc *procp,

                            struct mbuf **mrq));

int     nfsrv_read __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                        struct proc *procp, struct mbuf **mrq));

int     nfsrv_readdir __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                           struct proc *procp, struct mbuf **mrq));

int     nfsrv_readdirplus __P((struct nfsrv_descript *nfsd,

                               struct nfssvc_sock *slp, struct proc *procp,

                               struct mbuf **mrq));

int     nfsrv_readlink __P((struct nfsrv_descript *nfsd,

                            struct nfssvc_sock *slp, struct proc *procp,

                            struct mbuf **mrq));

int     nfsrv_remove __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                          struct proc *procp, struct mbuf **mrq));

int     nfsrv_rename __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                          struct proc *procp, struct mbuf **mrq));

int     nfsrv_rmdir __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                         struct proc *procp, struct mbuf **mrq));

int     nfsrv_setattr __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                           struct proc *procp, struct mbuf **mrq));

int     nfsrv_statfs __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                          struct proc *procp, struct mbuf **mrq));

int     nfsrv_symlink __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                           struct proc *procp, struct mbuf **mrq));

int     nfsrv_write __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,

                         struct proc *procp, struct mbuf **mrq));

#ifdef NFS_DEBUG

extern int nfs_debug;

#define NFS_DEBUG_ASYNCIO       1 /* asynchronous i/o */

#define NFS_DEBUG_WG            2 /* server write gathering */

#define NFS_DEBUG_RC            4 /* server request caching */

#define NFS_DPF(cat, args)                                      \

        do {                                                    \

                if (nfs_debug & NFS_DEBUG_##cat) printf args;   \

        } while (0)

#else

#define NFS_DPF(cat, args)

#endif

#endif  /* KERNEL */

#endif