559 lines
17 KiB
C
559 lines
17 KiB
C
/* $NetBSD: nfs.h,v 1.39 2003/06/29 22:32:12 fvdl Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1995
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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 8.4 (Berkeley) 5/1/95
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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_TICKINTVL 5 /* Desired time for a tick (msec) */
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#define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
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#define NFS_TIMEO (3 * NFS_HZ) /* Default timeout = 3 seconds */
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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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/*
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* These can be overridden through <machine/param.h>, included via
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* <sys/param.h>. This means that <sys/param.h> should always be
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* included before this file.
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*/
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#ifndef NFS_WSIZE
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#define NFS_WSIZE 8192 /* Def. write data size */
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#endif
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#ifndef NFS_RSIZE
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#define NFS_RSIZE 8192 /* Def. read data size */
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#endif
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#ifndef NFS_READDIRSIZE
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#define NFS_READDIRSIZE 8192 /* Def. readdir size */
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#endif
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#define NFS_DEFRAHEAD 2 /* Def. read ahead # blocks */
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#define NFS_MAXRAHEAD 4 /* Max. read ahead # blocks */
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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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#ifdef _KERNEL
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extern int nfs_niothreads; /* Number of async_daemons desired */
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#ifndef NFS_DEFAULT_NIOTHREADS
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#define NFS_DEFAULT_NIOTHREADS 4
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#endif
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#endif
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#define NFS_MAXGATHERDELAY 100 /* Max. write gather delay (msec) */
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#ifndef NFS_GATHERDELAY
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#define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */
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#endif
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/*
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* NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for
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* NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount
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* of data in those buffers, and thus the minimum amount of data
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* that you can request. NFS_DIRFRAGSIZ should be no smaller than
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* DIRBLKSIZ.
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*/
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#define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */
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#define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */
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/*
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* Maximum number of directory entries cached per NFS node, to avoid
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* having this grow without bounds on very large directories. The
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* minimum size to get reasonable performance for emulated binaries
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* is the maximum number of entries that fits in NFS_DIRBLKSIZ.
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* For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36.
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*/
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#define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14)
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/*
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* Oddballs
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*/
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#define NMOD(a) ((a) % nfs_asyncdaemons)
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#define NFS_CMPFH(n, f, s) \
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((n)->n_fhsize == (s) && !memcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s)))
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#ifdef NFS_V2_ONLY
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#define NFS_ISV3(v) (0)
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#else
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#define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
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#endif
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#define NFS_SRVMAXDATA(n) \
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(((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
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NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
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/*
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* The VA_EXCLUSIVE flag should be added for va_vaflags and set for an
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* exclusive create.
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*/
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#if 0
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#ifndef VA_EXCLUSIVE
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#define VA_EXCLUSIVE 0
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#endif
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#endif
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/*
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* Use the vm_page flag reserved for pager use to indicate pages
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* which have been written to the server but not yet committed.
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*/
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#define PG_NEEDCOMMIT PG_PAGER1
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/*
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* The IO_METASYNC flag should be implemented for local file systems.
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* (Until then, it is nothin at all.)
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*/
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#ifndef IO_METASYNC
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#define IO_METASYNC 0
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#endif
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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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* Expected allocation sizes for major data structures. If the actual size
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* of the structure exceeds these sizes, then malloc() will be allocating
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* almost twice the memory required. This is used in nfs_init() to warn
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* the sysadmin that the size of a structure should be reduced.
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* (These sizes are always a power of 2. If the kernel malloc() changes
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* to one that does not allocate space in powers of 2 size, then this all
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* becomes bunk!)
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*/
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#define NFS_NODEALLOC 256
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#define NFS_MNTALLOC 512
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#define NFS_SVCALLOC 256
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#define NFS_UIDALLOC 128
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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 addr 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_int32_t nsd_haddr; /* Ip address of client */
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struct uucred nsd_cr; /* Cred. uid maps to */
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int nsd_authlen; /* Length of auth string (ret) */
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u_char *nsd_authstr; /* Auth string (ret) */
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int nsd_verflen; /* and the verfier */
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u_char *nsd_verfstr;
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struct timeval nsd_timestamp; /* timestamp from verifier */
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u_int32_t nsd_ttl; /* credential ttl (sec) */
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NFSKERBKEY_T nsd_key; /* Session key */
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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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u_int ncd_authlen; /* Length of authenticator string */
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u_char *ncd_authstr; /* Authenticator string */
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u_int ncd_verflen; /* and the verifier */
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u_char *ncd_verfstr;
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NFSKERBKEY_T ncd_key; /* Session key */
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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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int srvvop_writes;
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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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* fs.nfs sysctl(3) identifiers
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*/
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#define NFS_NFSSTATS 1 /* struct: struct nfsstats */
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#define NFS_IOTHREADS 2 /* number of io threads */
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#define NFS_MAXID 3
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#define NFS_NAMES { \
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{ 0, 0 }, \
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{ "nfsstats", CTLTYPE_STRUCT }, \
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{ "iothreads", CTLTYPE_INT }, \
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}
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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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struct uio; struct buf; struct vattr; struct nameidata; /* XXX */
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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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TAILQ_ENTRY(nfsreq) r_chain;
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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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u_int32_t 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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u_int32_t 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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/*
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* Queue head for nfsreq's
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*/
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extern TAILQ_HEAD(nfsreqhead, nfsreq) nfs_reqq;
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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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/*
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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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#ifndef NFS_UIDHASHSIZ
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#define NFS_UIDHASHSIZ 29 /* Tune the size of nfssvc_sock with this */
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#endif
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#define NUIDHASH(sock, uid) \
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(&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ])
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#ifndef NFS_WDELAYHASHSIZ
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#define NFS_WDELAYHASHSIZ 16 /* and with this */
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#endif
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#define NWDELAYHASH(sock, f) \
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(&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ])
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#ifndef NFS_MUIDHASHSIZ
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#define NFS_MUIDHASHSIZ 63 /* Tune the size of nfsmount with this */
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#endif
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#define NMUIDHASH(nmp, uid) \
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(&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ])
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#define NFSNOHASH(fhsum) ((fhsum) & nfsnodehash)
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#ifndef NFS_DIRHASHSIZ
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#define NFS_DIRHASHSIZ 64
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#endif
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#define NFSDIRHASH(np, off) \
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(&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)])
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/*
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* Macros for storing/retrieving cookies into directory buffers.
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*/
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#define NFS_STASHCOOKIE(dp,off) \
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*((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t))) = off
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#define NFS_GETCOOKIE(dp) \
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(*((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t))))
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#define NFS_STASHCOOKIE32(dp, val) \
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*((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \
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sizeof (int))) = val
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#define NFS_GETCOOKIE32(dp) \
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(*((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \
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sizeof (int))))
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/*
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* Flags passed to nfs_bioread().
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*/
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#define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */
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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_int32_t had_inetaddr;
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struct mbuf *had_nam;
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};
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struct nfsuid {
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TAILQ_ENTRY(nfsuid) nu_lru; /* LRU chain */
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LIST_ENTRY(nfsuid) nu_hash; /* Hash list */
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int nu_flag; /* Flags */
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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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int nu_expire; /* Expiry time (sec) */
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struct timeval nu_timestamp; /* Kerb. timestamp */
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u_int32_t nu_nickname; /* Nickname on server */
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NFSKERBKEY_T nu_key; /* and session key */
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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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#define NU_NAM 0x2
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#ifdef INET6
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#define NU_NETFAM(u) \
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(((u)->nu_flag & NU_INETADDR) ? \
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(((u)->nu_flag & NU_NAM) ? AF_INET6 : AF_INET) : AF_ISO)
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#else
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#define NU_NETFAM(u) (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO)
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#endif
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struct nfssvc_sock {
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TAILQ_ENTRY(nfssvc_sock) ns_chain; /* List of all nfssvc_sock's */
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TAILQ_ENTRY(nfssvc_sock) ns_pending; /* List of pending sockets */
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TAILQ_HEAD(, nfsuid) ns_uidlruhead;
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struct file *ns_fp;
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struct socket *ns_so;
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struct mbuf *ns_nam;
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struct mbuf *ns_raw;
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struct mbuf *ns_rawend;
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struct mbuf *ns_rec;
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struct mbuf *ns_recend;
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struct mbuf *ns_frag;
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int ns_flag;
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int ns_solock;
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int ns_cc;
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int ns_reclen;
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int ns_numuids;
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u_int32_t ns_sref;
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LIST_HEAD(, nfsrv_descript) ns_tq; /* Write gather lists */
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LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];
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LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ];
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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_LASTFRAG 0x20
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#define SLP_ALLFLAGS 0xff
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extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
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extern struct nfssvc_sockhead nfssvc_sockpending;
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extern int nfssvc_sockhead_flag;
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|
#define SLP_INIT 0x01
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|
#define SLP_WANTINIT 0x02
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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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TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */
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SLIST_ENTRY(nfsd) nfsd_idle; /* List of idle nfsd's */
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int nfsd_flag; /* NFSD_ flags */
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|
struct nfssvc_sock *nfsd_slp; /* Current socket */
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int nfsd_authlen; /* Authenticator len */
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|
u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
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|
int nfsd_verflen; /* and the Verifier */
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|
u_char nfsd_verfstr[RPCVERF_MAXSIZ];
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struct proc *nfsd_procp; /* Proc ptr */
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|
struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */
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|
};
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|
|
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/* Bits for "nfsd_flag" */
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#define NFSD_WAITING 0x01
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|
#define NFSD_REQINPROG 0x02
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#define NFSD_NEEDAUTH 0x04
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|
#define NFSD_AUTHFAIL 0x08
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|
|
|
/*
|
|
* 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 {
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|
u_quad_t nd_time; /* Write deadline (usec) */
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|
off_t nd_off; /* Start byte offset */
|
|
off_t nd_eoff; /* and end byte offset */
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|
LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */
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|
LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */
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|
LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */
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|
struct mbuf *nd_mrep; /* Request mbuf list */
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|
struct mbuf *nd_md; /* Current dissect mbuf */
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|
struct mbuf *nd_mreq; /* Reply mbuf list */
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|
struct mbuf *nd_nam; /* and socket addr */
|
|
struct mbuf *nd_nam2; /* return socket addr */
|
|
caddr_t nd_dpos; /* Current dissect pos */
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|
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 */
|
|
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 struct simplelock nfsd_slock;
|
|
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((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) && \
|
|
!memcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
|
|
sizeof (struct ucred)))
|
|
|
|
/*
|
|
* 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]))
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _NFS_NFS_H */
|