308 lines
9.7 KiB
C
308 lines
9.7 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfs.h 8.1 (Berkeley) 6/10/93
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* $Id: nfs.h,v 1.3 1994/08/04 06:03:46 davidg Exp $
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*/
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#ifndef _NFS_NFS_H_
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#define _NFS_NFS_H_
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/*
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* Tunable constants for nfs
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*/
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#define NFS_MAXIOVEC 34
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#define NFS_HZ 25 /* Ticks per second for NFS timeouts */
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#define NFS_TIMEO (1*NFS_HZ) /* Default timeout = 1 second */
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#define NFS_MINTIMEO (1*NFS_HZ) /* Min timeout to use */
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#define NFS_MAXTIMEO (60*NFS_HZ) /* Max timeout to backoff to */
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#define NFS_MINIDEMTIMEO (5*NFS_HZ) /* Min timeout for non-idempotent ops*/
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#define NFS_MAXREXMIT 100 /* Stop counting after this many */
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#define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */
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#define NFS_RETRANS 10 /* Num of retrans for soft mounts */
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#define NFS_MAXGRPS 16 /* Max. size of groups list */
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#ifndef NFS_MINATTRTIMO
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#define NFS_MINATTRTIMO 5 /* Attribute cache timeout in sec */
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#endif
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#ifndef NFS_MAXATTRTIMO
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#define NFS_MAXATTRTIMO 60
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#endif
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#define NFS_WSIZE 8192 /* Def. write data size <= 8192 */
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#define NFS_RSIZE 8192 /* Def. read data size <= 8192 */
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#define NFS_DEFRAHEAD 1 /* Def. read ahead # blocks */
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#define NFS_MAXRAHEAD 4 /* Max. read ahead # blocks */
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#define NFS_MAXREADDIR NFS_MAXDATA /* Max. size of directory read */
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#define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */
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#define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */
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#define NFS_DIRBLKSIZ 1024 /* Size of an NFS directory block */
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#define NMOD(a) ((a) % nfs_asyncdaemons)
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/*
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* Set the attribute timeout based on how recently the file has been modified.
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*/
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#define NFS_ATTRTIMEO(np) \
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((((np)->n_flag & NMODIFIED) || \
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(time.tv_sec - (np)->n_mtime) / 10 < NFS_MINATTRTIMO) ? NFS_MINATTRTIMO : \
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((time.tv_sec - (np)->n_mtime) / 10 > NFS_MAXATTRTIMO ? NFS_MAXATTRTIMO : \
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(time.tv_sec - (np)->n_mtime) / 10))
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/*
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* Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs
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* should ever try and use it.
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*/
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struct nfsd_args {
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int sock; /* Socket to serve */
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caddr_t name; /* Client address for connection based sockets */
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int namelen; /* Length of name */
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};
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struct nfsd_srvargs {
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struct nfsd *nsd_nfsd; /* Pointer to in kernel nfsd struct */
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uid_t nsd_uid; /* Effective uid mapped to cred */
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u_long nsd_haddr; /* Ip address of client */
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struct ucred nsd_cr; /* Cred. uid maps to */
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int nsd_authlen; /* Length of auth string (ret) */
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char *nsd_authstr; /* Auth string (ret) */
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};
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struct nfsd_cargs {
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char *ncd_dirp; /* Mount dir path */
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uid_t ncd_authuid; /* Effective uid */
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int ncd_authtype; /* Type of authenticator */
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int ncd_authlen; /* Length of authenticator string */
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char *ncd_authstr; /* Authenticator string */
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};
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/*
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* Stats structure
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*/
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struct nfsstats {
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int attrcache_hits;
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int attrcache_misses;
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int lookupcache_hits;
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int lookupcache_misses;
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int direofcache_hits;
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int direofcache_misses;
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int biocache_reads;
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int read_bios;
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int read_physios;
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int biocache_writes;
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int write_bios;
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int write_physios;
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int biocache_readlinks;
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int readlink_bios;
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int biocache_readdirs;
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int readdir_bios;
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int rpccnt[NFS_NPROCS];
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int rpcretries;
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int srvrpccnt[NFS_NPROCS];
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int srvrpc_errs;
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int srv_errs;
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int rpcrequests;
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int rpctimeouts;
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int rpcunexpected;
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int rpcinvalid;
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int srvcache_inproghits;
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int srvcache_idemdonehits;
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int srvcache_nonidemdonehits;
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int srvcache_misses;
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int srvnqnfs_leases;
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int srvnqnfs_maxleases;
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int srvnqnfs_getleases;
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};
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/*
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* Flags for nfssvc() system call.
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*/
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#define NFSSVC_BIOD 0x002
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#define NFSSVC_NFSD 0x004
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#define NFSSVC_ADDSOCK 0x008
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#define NFSSVC_AUTHIN 0x010
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#define NFSSVC_GOTAUTH 0x040
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#define NFSSVC_AUTHINFAIL 0x080
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#define NFSSVC_MNTD 0x100
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/*
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* The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
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* What should be in this set is open to debate, but I believe that since
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* I/O system calls on ufs are never interrupted by signals the set should
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* be minimal. My reasoning is that many current programs that use signals
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* such as SIGALRM will not expect file I/O system calls to be interrupted
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* by them and break.
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*/
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#ifdef KERNEL
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#define NFSINT_SIGMASK (sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \
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sigmask(SIGHUP)|sigmask(SIGQUIT))
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/*
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* Socket errors ignored for connectionless sockets??
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* For now, ignore them all
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*/
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#define NFSIGNORE_SOERROR(s, e) \
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((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
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((s) & PR_CONNREQUIRED) == 0)
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/*
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* Nfs outstanding request list element
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*/
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struct nfsreq {
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struct nfsreq *r_next;
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struct nfsreq *r_prev;
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struct mbuf *r_mreq;
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struct mbuf *r_mrep;
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struct mbuf *r_md;
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caddr_t r_dpos;
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struct nfsmount *r_nmp;
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struct vnode *r_vp;
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u_long r_xid;
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int r_flags; /* flags on request, see below */
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int r_retry; /* max retransmission count */
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int r_rexmit; /* current retrans count */
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int r_timer; /* tick counter on reply */
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int r_procnum; /* NFS procedure number */
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int r_rtt; /* RTT for rpc */
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struct proc *r_procp; /* Proc that did I/O system call */
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};
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/* Flag values for r_flags */
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#define R_TIMING 0x01 /* timing request (in mntp) */
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#define R_SENT 0x02 /* request has been sent */
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#define R_SOFTTERM 0x04 /* soft mnt, too many retries */
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#define R_INTR 0x08 /* intr mnt, signal pending */
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#define R_SOCKERR 0x10 /* Fatal error on socket */
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#define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
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#define R_MUSTRESEND 0x40 /* Must resend request */
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#define R_GETONEREP 0x80 /* Probe for one reply only */
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struct nfsstats nfsstats;
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/*
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* A list of nfssvc_sock structures is maintained with all the sockets
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* that require service by the nfsd.
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* The nfsuid structs hang off of the nfssvc_sock structs in both lru
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* and uid hash lists.
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*/
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#define NUIDHASHSIZ 32
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#define NUIDHASH(uid) ((uid) & (NUIDHASHSIZ - 1))
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/*
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* Network address hash list element
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*/
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union nethostaddr {
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u_long had_inetaddr;
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struct mbuf *had_nam;
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};
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struct nfsuid {
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struct nfsuid *nu_lrunext; /* MUST be first */
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struct nfsuid *nu_lruprev;
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struct nfsuid *nu_hnext;
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struct nfsuid *nu_hprev;
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int nu_flag; /* Flags */
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uid_t nu_uid; /* Uid mapped by this entry */
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union nethostaddr nu_haddr; /* Host addr. for dgram sockets */
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struct ucred nu_cr; /* Cred uid mapped to */
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};
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#define nu_inetaddr nu_haddr.had_inetaddr
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#define nu_nam nu_haddr.had_nam
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/* Bits for nu_flag */
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#define NU_INETADDR 0x1
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struct nfssvc_sock {
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struct nfsuid *ns_lrunext; /* MUST be first */
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struct nfsuid *ns_lruprev;
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struct nfssvc_sock *ns_next;
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struct nfssvc_sock *ns_prev;
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int ns_flag;
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u_long ns_sref;
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struct file *ns_fp;
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struct socket *ns_so;
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int ns_solock;
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struct mbuf *ns_nam;
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int ns_cc;
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struct mbuf *ns_raw;
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struct mbuf *ns_rawend;
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int ns_reclen;
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struct mbuf *ns_rec;
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struct mbuf *ns_recend;
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int ns_numuids;
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struct nfsuid *ns_uidh[NUIDHASHSIZ];
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};
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/* Bits for "ns_flag" */
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#define SLP_VALID 0x01
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#define SLP_DOREC 0x02
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#define SLP_NEEDQ 0x04
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#define SLP_DISCONN 0x08
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#define SLP_GETSTREAM 0x10
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#define SLP_INIT 0x20
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#define SLP_WANTINIT 0x40
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#define SLP_ALLFLAGS 0xff
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/*
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* One of these structures is allocated for each nfsd.
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*/
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struct nfsd {
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struct nfsd *nd_next; /* Must be first */
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struct nfsd *nd_prev;
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int nd_flag; /* NFSD_ flags */
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struct nfssvc_sock *nd_slp; /* Current socket */
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struct mbuf *nd_nam; /* Client addr for datagram req. */
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struct mbuf *nd_mrep; /* Req. mbuf list */
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struct mbuf *nd_md;
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caddr_t nd_dpos; /* Position in list */
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int nd_procnum; /* RPC procedure number */
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u_long nd_retxid; /* RPC xid */
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int nd_repstat; /* Reply status value */
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struct ucred nd_cr; /* Credentials for req. */
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int nd_nqlflag; /* Leasing flag */
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int nd_duration; /* Lease duration */
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int nd_authlen; /* Authenticator len */
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u_char nd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
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struct proc *nd_procp; /* Proc ptr */
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};
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#define NFSD_WAITING 0x01
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#define NFSD_CHECKSLP 0x02
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#define NFSD_REQINPROG 0x04
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#define NFSD_NEEDAUTH 0x08
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#define NFSD_AUTHFAIL 0x10
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#endif /* KERNEL */
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#endif
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