NetBSD/sys/nfs/nfs.h

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1993-04-20 15:20:47 +04:00
/*
* Copyright (c) 1989 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.
*
* from: @(#)nfs.h 7.11 (Berkeley) 4/19/91
* $Id: nfs.h,v 1.2 1993/05/20 03:18:35 cgd Exp $
1993-04-20 15:20:47 +04:00
*/
#ifndef _NFS_NFS_H_
#define _NFS_NFS_H_
/*
* Tunable constants for nfs
*/
#define NFS_MAXIOVEC 34
#define NFS_HZ 10 /* Ticks per second for NFS timeouts */
#define NFS_TIMEO (1*NFS_HZ) /* Default timeout = 1 second */
#define NFS_MINTIMEO (NFS_HZ) /* Min timeout to use */
#define NFS_MAXTIMEO (60*NFS_HZ) /* Max timeout to backoff to */
#define NFS_MINIDEMTIMEO (2*NFS_HZ) /* Min timeout for non-idempotent ops*/
#define NFS_RELIABLETIMEO (5*NFS_HZ) /* Min timeout on reliable sockets */
#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_FISHY 8 /* Host not responding at this count */
#define NFS_ATTRTIMEO 5 /* Attribute cache timeout in sec */
#define NFS_WSIZE 8192 /* Def. write data size <= 8192 */
#define NFS_RSIZE 8192 /* Def. read data size <= 8192 */
#define NFS_MAXREADDIR NFS_MAXDATA /* Max. size of directory read */
#define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */
#define NFS_DIRBLKSIZ 1024 /* Size of an NFS directory block */
#define NMOD(a) ((a) % nfs_asyncdaemons)
/*
* 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.
*/
#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 {
struct nfsreq *r_next;
struct nfsreq *r_prev;
struct mbuf *r_mreq;
struct mbuf *r_mrep;
struct nfsmount *r_nmp;
struct vnode *r_vp;
u_long r_xid;
short r_flags; /* flags on request, see below */
short r_retry; /* max retransmission count */
short r_rexmit; /* current retrans count */
short r_timer; /* tick counter on reply */
short r_timerinit; /* reinit tick counter on reply */
struct proc *r_procp; /* Proc that did I/O system call */
};
/* 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 */
#ifdef KERNEL
/*
* Silly rename structure that hangs off the nfsnode until the name
* can be removed by nfs_inactive()
*/
struct sillyrename {
nfsv2fh_t s_fh;
struct ucred *s_cred;
struct vnode *s_dvp;
u_short s_namlen;
char s_name[20];
};
/* And its flag values */
#define REMOVE 0
#define RMDIR 1
#endif /* KERNEL */
/*
* 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;
};
#ifdef KERNEL
struct nfsstats nfsstats;
#endif /* KERNEL */
#endif /* !_NFS_NFS_H_ */