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/* $NetBSD: nfs.h,v 1.75 2015/04/20 13:12:24 riastradh Exp $ */
/*
* Copyright (c) 1989, 1993, 1995
* 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.
*
* @(#)nfs.h 8.4 (Berkeley) 5/1/95
*/
#ifndef _NFS_NFS_H_
#define _NFS_NFS_H_
#ifdef _KERNEL
#include <sys/condvar.h>
#include <sys/fstypes.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#endif
/*
* 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 (3 * NFS_HZ) /* Default timeout = 3 seconds */
#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_TRYLATERDEL 1 /* Initial try later delay (sec) */
#define NFS_TRYLATERDELMAX (1*60) /* Maximum try later delay (sec) */
#define NFS_TRYLATERDELMUL 2 /* Exponential backoff multiplier */
#define NFS_CWNDSCALE 256
#define NFS_MAXCWND (NFS_CWNDSCALE * 32)
/*
* These can be overridden through <machine/param.h>, included via
* <sys/param.h>. This means that <sys/param.h> should always be
* included before this file.
*/
#ifndef NFS_WSIZE
#define NFS_WSIZE 8192 /* Def. write data size */
#endif
#ifndef NFS_RSIZE
#define NFS_RSIZE 8192 /* Def. read data size */
#endif
#ifndef NFS_READDIRSIZE
#define NFS_READDIRSIZE 8192 /* Def. readdir size */
#endif
/*
* NFS client IO daemon threads. May be overridden by config options.
*/
#ifndef NFS_MAXASYNCDAEMON
#define NFS_MAXASYNCDAEMON 128 /* Max. number async_daemons runable */
#endif
/*
* NFS client read-ahead. May be overridden by config options.
* Should be no more than NFS_MAXASYNCDAEMON as each read-ahead operation
* requires one IO thread.
*/
#ifndef NFS_MAXRAHEAD
#define NFS_MAXRAHEAD 32 /* Max. read ahead # blocks */
#endif
#define NFS_DEFRAHEAD 2 /* Def. read ahead # blocks */
#define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */
#define NFS_DEFDEADTHRESH NFS_NEVERDEAD /* Default nm_deadthresh */
#define NFS_NEVERDEAD 9 /* Greater than max. nm_timeouts */
#ifdef _KERNEL
extern int nfs_niothreads; /* Number of async_daemons desired */
#ifndef NFS_DEFAULT_NIOTHREADS
#define NFS_DEFAULT_NIOTHREADS 4
#endif
#endif
#define NFS_MAXGATHERDELAY 100 /* Max. write gather delay (msec) */
#ifndef NFS_GATHERDELAY
#define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */
#endif
/*
* NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for
* NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount
* of data in those buffers, and thus the minimum amount of data
* that you can request. NFS_DIRFRAGSIZ should be no smaller than
* DIRBLKSIZ.
*/
#define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */
#define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */
/*
* Maximum number of directory entries cached per NFS node, to avoid
* having this grow without bounds on very large directories. The
* minimum size to get reasonable performance for emulated binaries
* is the maximum number of entries that fits in NFS_DIRBLKSIZ.
* For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36.
*/
#define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14)
/*
* Oddballs
*/
#define NFS_CMPFH(n, f, s) \
((n)->n_fhsize == (s) && !memcmp((void *)(n)->n_fhp, (void *)(f), (s)))
#ifdef NFS_V2_ONLY
#define NFS_ISV3(v) (0)
#else
#define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
#endif
#define NFS_SRVMAXDATA(n) \
(((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
/*
* Use the vm_page flag reserved for pager use to indicate pages
* which have been written to the server but not yet committed.
*/
#define PG_NEEDCOMMIT PG_PAGER1
/*
* 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
/*
* Export arguments for local filesystem mount calls.
* Keep in mind that changing this structure modifies nfssvc(2)'s ABI (see
* 'struct mountd_exports_list' below).
* When modifying this structure, take care to also edit the
* nfs_update_exports_30 function in nfs_export.c accordingly to convert
* export_args to export_args30.
*/
struct export_args {
int ex_flags; /* export related flags */
uid_t ex_root; /* mapping for root uid */
struct uucred ex_anon; /* mapping for anonymous user */
struct sockaddr *ex_addr; /* net address to which exported */
int ex_addrlen; /* and the net address length */
struct sockaddr *ex_mask; /* mask of valid bits in saddr */
int ex_masklen; /* and the smask length */
char *ex_indexfile; /* index file for WebNFS URLs */
};
/*
* Structures for the nfssvc(2) syscall. Not that anyone but mountd, nfsd and
* mount_nfs should ever try and use it.
*/
struct nfsd_args {
int sock; /* Socket to serve */
void * name; /* Client addr 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_int32_t nsd_haddr; /* Ip address of client */
struct uucred 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_int32_t 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 */
u_int ncd_authlen; /* Length of authenticator string */
u_char *ncd_authstr; /* Authenticator string */
u_int ncd_verflen; /* and the verifier */
u_char *ncd_verfstr;
NFSKERBKEY_T ncd_key; /* Session key */
};
struct mountd_exports_list {
const char *mel_path;
size_t mel_nexports;
struct export_args *mel_exports;
};
/*
* try to keep nfsstats, which is exposed to userland via sysctl,
* compatible after NQNFS removal.
* 26 is the old value of NFS_NPROCS, which includes NQNFS procedures.
*/
#define NFSSTATS_NPROCS 26
/*
* Stats structure
*/
struct nfsstats {
uint32_t attrcache_hits;
uint32_t attrcache_misses;
uint32_t lookupcache_hits;
uint32_t lookupcache_misses;
uint32_t direofcache_hits;
uint32_t direofcache_misses;
uint32_t biocache_reads;
uint32_t read_bios;
uint32_t read_physios;
uint32_t biocache_writes;
uint32_t write_bios;
uint32_t write_physios;
uint32_t biocache_readlinks;
uint32_t readlink_bios;
uint32_t biocache_readdirs;
uint32_t readdir_bios;
uint32_t rpccnt[NFSSTATS_NPROCS];
uint32_t rpcretries;
uint32_t srvrpccnt[NFSSTATS_NPROCS];
uint32_t srvrpc_errs;
uint32_t srv_errs;
uint32_t rpcrequests;
uint32_t rpctimeouts;
uint32_t rpcunexpected;
uint32_t rpcinvalid;
uint32_t srvcache_inproghits;
uint32_t srvcache_idemdonehits;
uint32_t srvcache_nonidemdonehits;
uint32_t srvcache_misses;
uint32_t __srvnqnfs_leases; /* unused */
uint32_t __srvnqnfs_maxleases; /* unused */
uint32_t __srvnqnfs_getleases; /* unused */
uint32_t 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
#define NFSSVC_SETEXPORTSLIST 0x200
/*
* fs.nfs sysctl(3) identifiers
*/
#define NFS_NFSSTATS 1 /* struct: struct nfsstats */
#define NFS_IOTHREADS 2 /* number of io threads */
#define NFS_MAXID 3
#define NFS_NAMES { \
{ 0, 0 }, \
{ "nfsstats", CTLTYPE_STRUCT }, \
{ "iothreads", 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.
*/
#ifdef _KERNEL
struct uio; struct buf; struct vattr; struct nameidata; /* XXX */
/*
* 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;
void * r_dpos;
struct nfsmount *r_nmp;
u_int32_t r_xid;
int r_flags; /* flags on request, see below */
int r_retry; /* max retransmission count */
int r_rexmit; /* current retrans count */
u_int32_t r_procnum; /* NFS procedure number */
int r_rtt; /* RTT for rpc */
struct lwp *r_lwp; /* LWP that did I/O system call */
};
/*
* Queue head for nfsreq's
*/
extern TAILQ_HEAD(nfsreqhead, 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_REXMITTED 0x100 /* retransmitted after reconnect */
/*
* 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
#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])
#ifndef NFS_DIRHASHSIZ
#define NFS_DIRHASHSIZ 64
#endif
#define NFSDIRHASH(np, off) \
(&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)])
/*
* Macros for storing/retrieving cookies into directory buffers.
*/
#define NFS_STASHCOOKIE(dp,off) \
*((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))) = off
#define NFS_GETCOOKIE(dp) \
(*((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))))
#define NFS_STASHCOOKIE32(dp, val) \
*((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
sizeof (int))) = val
#define NFS_GETCOOKIE32(dp) \
(*((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
sizeof (int))))
/*
* Flags passed to nfs_bioread().
*/
#define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */
/*
* Network address hash list element
*/
union nethostaddr {
u_int32_t 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 */
kauth_cred_t nu_cr; /* Cred uid mapped to */
int nu_expire; /* Expiry time (sec) */
struct timeval nu_timestamp; /* Kerb. timestamp */
u_int32_t 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_INET6)
/*
* b: protected by SLP_BUSY
* g: protected by nfsd_lock
* s: protected by ns_lock
* a: protected by ns_alock
*/
struct nfssvc_sock {
kmutex_t ns_lock;
kmutex_t ns_alock;
kcondvar_t ns_cv; /* s: */
TAILQ_ENTRY(nfssvc_sock) ns_chain; /* g: List of all nfssvc_sock */
TAILQ_ENTRY(nfssvc_sock) ns_pending; /* g: List of pending sockets */
TAILQ_HEAD(, nfsuid) ns_uidlruhead;
struct file *ns_fp;
struct socket *ns_so;
struct mbuf *ns_nam;
struct mbuf *ns_raw; /* b: */
struct mbuf *ns_rawend; /* b: */
struct mbuf *ns_rec; /* b: */
struct mbuf *ns_recend; /* b: */
struct mbuf *ns_frag; /* b: */
int ns_flags; /* s: */
int ns_aflags; /* a: */
int ns_gflags; /* g: */
int ns_sflags; /* b: */
int ns_cc; /* b: */
int ns_reclen; /* b: */
int ns_numuids;
u_int32_t ns_sref; /* g: */
SIMPLEQ_HEAD(, nfsrv_descript) ns_sendq; /* s: send reply list */
LIST_HEAD(, nfsrv_descript) ns_tq; /* g: Write gather lists */
LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];
LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; /* g: */
};
/* Bits for "ns_flags" */
#define SLP_VALID 0x01
#define SLP_BUSY 0x10
#define SLP_SENDING 0x80
/* Bits for "ns_aflags" */
#define SLP_A_NEEDQ 0x01
#define SLP_A_DISCONN 0x04
/* Bits for "ns_gflags" */
#define SLP_G_DOREC 0x02 /* on nfssvc_sockpending queue */
/* Bits for "ns_sflags" */
#define SLP_S_LASTFRAG 0x40
extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
extern struct nfssvc_sockhead nfssvc_sockpending;
extern int nfssvc_sockhead_flag;
#define SLP_INIT 0x01
/*
* One of these structures is allocated for each nfsd.
*/
struct nfsd {
TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */
SLIST_ENTRY(nfsd) nfsd_idle; /* List of idle nfsd's */
kcondvar_t nfsd_cv;
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_NEEDAUTH 0x04
#define NFSD_AUTHFAIL 0x08
#define NFSD_MAXFHSIZE 64
typedef struct nfsrvfh {
size_t nsfh_size;
union {
fhandle_t u_fh;
uint8_t u_opaque[NFSD_MAXFHSIZE];
} nsfh_u;
} nfsrvfh_t;
#define NFSRVFH_SIZE(nsfh) ((nsfh)->nsfh_size)
#define NFSRVFH_DATA(nsfh) ((nsfh)->nsfh_u.u_opaque)
#define NFSRVFH_FHANDLE(nsfh) (&(nsfh)->nsfh_u.u_fh)
/*
* 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 */
SIMPLEQ_ENTRY(nfsrv_descript) nd_sendq; /* send reply list */
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 */
void * nd_dpos; /* Current dissect pos */
u_int32_t 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_int32_t nd_retxid; /* Reply xid */
u_int32_t nd_duration; /* Lease duration */
struct timeval nd_starttime; /* Time RPC initiated */
nfsrvfh_t nd_fh; /* File handle */
kauth_cred_t nd_cr; /* Credentials */
};
/* Bits for "nd_flag" */
#define ND_READ 0x01 /* Check lease for readers */
#define ND_WRITE 0x02 /* Check lease for modifiers */
#define ND_CHECK 0x04
#define ND_LEASE (ND_READ | ND_WRITE | ND_CHECK)
#define ND_NFSV3 0x08
#define ND_KERBNICK 0x20
#define ND_KERBFULL 0x40
#define ND_KERBAUTH (ND_KERBNICK | ND_KERBFULL)
extern kmutex_t nfsd_lock;
extern kcondvar_t nfsd_initcv;
extern TAILQ_HEAD(nfsdhead, nfsd) nfsd_head;
extern SLIST_HEAD(nfsdidlehead, nfsd) nfsd_idle_head;
extern int nfsd_head_flag;
#define NFSD_CHECKSLP 0x01
extern struct mowner nfs_mowner;
extern struct nfsstats nfsstats;
extern int nfs_numasync;
/*
* These macros compare nfsrv_descript structures.
*/
#define NFSW_CONTIG(o, n) \
((o)->nd_eoff >= (n)->nd_off && \
!memcmp((void *)&(o)->nd_fh, (void *)&(n)->nd_fh, NFSX_V3FH))
/*
* Defines for WebNFS
*/
#define WEBNFS_ESC_CHAR '%'
#define WEBNFS_SPECCHAR_START 0x80
#define WEBNFS_NATIVE_CHAR 0x80
/*
* ..
* Possibly more here in the future.
*/
/*
* Macro for converting escape characters in WebNFS pathnames.
* Should really be in libkern.
*/
#define HEXTOC(c) \
((c) >= 'a' ? ((c) - ('a' - 10)) : \
((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
#define HEXSTRTOI(p) \
((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
/*
* Structure holding information for a publicly exported filesystem
* (WebNFS). Currently the specs allow just for one such filesystem.
*/
struct nfs_public {
int np_valid; /* Do we hold valid information */
fhandle_t *np_handle; /* Filehandle for pub fs (internal) */
struct mount *np_mount; /* Mountpoint of exported fs */
char *np_index; /* Index file */
};
#endif /* _KERNEL */
#endif /* _NFS_NFS_H */
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