241 lines
8.4 KiB
C
241 lines
8.4 KiB
C
/* $NetBSD: nfsnode.h,v 1.22 1997/10/12 23:13:38 fvdl Exp $ */
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/*
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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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* @(#)nfsnode.h 8.9 (Berkeley) 5/14/95
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*/
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#ifndef _NFS_NFSNODE_H_
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#define _NFS_NFSNODE_H_
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#ifndef _NFS_NFS_H_
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#include <nfs/nfs.h>
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#endif
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/*
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* Silly rename structure that hangs off the nfsnode until the name
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* can be removed by nfs_inactive()
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*/
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struct sillyrename {
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struct ucred *s_cred;
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struct vnode *s_dvp;
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long s_namlen;
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char s_name[20];
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};
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/*
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* Definitions for the directory cache. Because directory cookies
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* are an opaque 64 bit entity, we need to provide some sort of
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* mapping between cookies and logical blocknumbers. Also,
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* we should store the cookies from the server somewhere,
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* to be able to satisfy VOP_READDIR requests for cookies.
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* We can't store the cookies in the dirent structure, as some
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* other systems.
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*
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* Each offset is hashed into a per-nfsnode hashtable. An entry
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* found therein contains information about the (faked up)
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* logical blocknumber, and also a pointer to a buffer where
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* the cookies are stored.
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*/
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extern u_long nfsdirhashmask;
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LIST_HEAD(nfsdirhashhead, nfsdircache);
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TAILQ_HEAD(nfsdirchainhead, nfsdircache);
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struct nfsdircache {
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LIST_ENTRY(nfsdircache) dc_hash;
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TAILQ_ENTRY(nfsdircache) dc_chain;
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off_t dc_cookie;
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daddr_t dc_blkno;
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int dc_entry;
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};
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/*
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* The nfsnode is the nfs equivalent to ufs's inode. Any similarity
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* is purely coincidental.
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* There is a unique nfsnode allocated for each active file,
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* each current directory, each mounted-on file, text file, and the root.
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* An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
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* If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
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* type definitions), file handles of > 32 bytes should probably be split out
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* into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
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* changing the definition in sys/mount.h of NFS_SMALLFH.)
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* NB: Hopefully the current order of the fields is such that everything will
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* be well aligned and, therefore, tightly packed.
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*/
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struct nfsnode {
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LIST_ENTRY(nfsnode) n_hash; /* Hash chain */
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CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */
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u_quad_t n_size; /* Current size of file */
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u_quad_t n_brev; /* Modify rev when cached */
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u_quad_t n_lrev; /* Modify rev for lease */
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struct vattr n_vattr; /* Vnode attribute cache */
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time_t n_attrstamp; /* Attr. cache timestamp */
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time_t n_mtime; /* Prev modify time. */
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time_t n_ctime; /* Prev create time. */
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time_t n_nctime; /* Last neg cache entry (dir) */
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time_t n_expiry; /* Lease expiry time */
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nfsfh_t *n_fhp; /* NFS File Handle */
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struct vnode *n_vnode; /* associated vnode */
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struct lockf *n_lockf; /* Locking record of file */
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int n_error; /* Save write error value */
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union {
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struct timespec nf_atim; /* Special file times */
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nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */
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} n_un1;
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union {
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struct timespec nf_mtim;
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off_t nd_direof; /* Dir. EOF offset cache */
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} n_un2;
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union {
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struct sillyrename *nf_silly; /* Ptr to silly rename struct */
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struct nfsdirhashhead *nd_dircache;
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} n_un3;
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short n_fhsize; /* size in bytes, of fh */
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short n_flag; /* Flag for locking.. */
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nfsfh_t n_fh; /* Small File Handle */
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daddr_t n_dblkno; /* To keep faked dir blkno */
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unsigned n_dircachesize; /* Size of dir cookie cache */
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struct nfsdirchainhead n_dirchain; /* Chain of dir cookies */
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};
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#define n_atim n_un1.nf_atim
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#define n_mtim n_un2.nf_mtim
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#define n_sillyrename n_un3.nf_silly
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#define n_cookieverf n_un1.nd_cookieverf
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#define n_direofoffset n_un2.nd_direof
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#define n_dircache n_un3.nd_dircache
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/*
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* Flags for n_flag
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*/
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#define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */
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#define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */
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#define NMODIFIED 0x0004 /* Might have a modified buffer in bio */
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#define NWRITEERR 0x0008 /* Flag write errors so close will know */
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#define NQNFSNONCACHE 0x0020 /* Non-cachable lease */
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#define NQNFSWRITE 0x0040 /* Write lease */
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#define NQNFSEVICTED 0x0080 /* Has been evicted */
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#define NACC 0x0100 /* Special file accessed */
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#define NUPD 0x0200 /* Special file updated */
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#define NCHG 0x0400 /* Special file times changed */
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/*
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* Convert between nfsnode pointers and vnode pointers
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*/
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#define VTONFS(vp) ((struct nfsnode *)(vp)->v_data)
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#define NFSTOV(np) ((struct vnode *)(np)->n_vnode)
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/*
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* Queue head for nfsiod's
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*/
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extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
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extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
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#ifdef _KERNEL
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/*
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* Prototypes for NFS vnode operations
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*/
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int nfs_lookup __P((void *));
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int nfs_create __P((void *));
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int nfs_mknod __P((void *));
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int nfs_open __P((void *));
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int nfs_close __P((void *));
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int nfsspec_close __P((void *));
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int nfsfifo_close __P((void *));
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int nfs_access __P((void *));
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int nfsspec_access __P((void *));
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int nfs_getattr __P((void *));
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int nfs_setattr __P((void *));
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int nfs_read __P((void *));
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int nfs_write __P((void *));
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#define nfs_lease_check genfs_nullop
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#define nqnfs_vop_lease_check lease_check
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int nfsspec_read __P((void *));
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int nfsspec_write __P((void *));
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int nfsfifo_read __P((void *));
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int nfsfifo_write __P((void *));
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#define nfs_ioctl ((int (*) __P((void *)))enoioctl)
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#define nfs_poll genfs_poll
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#ifdef Lite2_integrated
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#define nfs_revoke vop_revoke
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#endif
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int nfs_mmap __P((void *));
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int nfs_fsync __P((void *));
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#define nfs_seek genfs_seek
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int nfs_remove __P((void *));
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int nfs_link __P((void *));
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int nfs_rename __P((void *));
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int nfs_mkdir __P((void *));
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int nfs_rmdir __P((void *));
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int nfs_symlink __P((void *));
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int nfs_readdir __P((void *));
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int nfs_readlink __P((void *));
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#define nfs_abortop genfs_abortop
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int nfs_inactive __P((void *));
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int nfs_reclaim __P((void *));
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#ifdef Lite2_integrated
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#define nfs_lock ((int (*) __P((void *)))vop_nolock)
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#define nfs_unlock ((int (*) __P((void *)))vop_nounlock)
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#define nfs_islocked ((int (*) __P((void *)))vop_noislocked)
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#else
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int nfs_lock __P((void *));
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int nfs_unlock __P((void *));
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int nfs_islocked __P((void *));
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#endif /* Lite2_integrated */
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int nfs_bmap __P((void *));
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int nfs_strategy __P((void *));
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int nfs_print __P((void *));
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int nfs_pathconf __P((void *));
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int nfs_advlock __P((void *));
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#define nfs_blkatoff genfs_eopnotsupp
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int nfs_bwrite __P((void *));
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int nfs_vget __P((struct mount *, ino_t, struct vnode **));
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#define nfs_valloc genfs_eopnotsupp
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#define nfs_reallocblks genfs_eopnotsupp
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#define nfs_vfree genfs_nullop
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int nfs_truncate __P((void *));
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int nfs_update __P((void *));
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extern int (**nfsv2_vnodeop_p) __P((void *));
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#endif /* _KERNEL */
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#endif
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