NetBSD/sys/nfs/nfsnode.h

235 lines
8.4 KiB
C

/* $NetBSD: nfsnode.h,v 1.26 1998/06/25 22:15:29 thorpej Exp $ */
/*
* Copyright (c) 1989, 1993
* 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.
*
* @(#)nfsnode.h 8.9 (Berkeley) 5/14/95
*/
#ifndef _NFS_NFSNODE_H_
#define _NFS_NFSNODE_H_
#ifndef _NFS_NFS_H_
#include <nfs/nfs.h>
#endif
/*
* Silly rename structure that hangs off the nfsnode until the name
* can be removed by nfs_inactive()
*/
struct sillyrename {
struct ucred *s_cred;
struct vnode *s_dvp;
long s_namlen;
char s_name[20];
};
/*
* Definitions for the directory cache. Because directory cookies
* are an opaque 64 bit entity, we need to provide some sort of
* mapping between cookies and logical blocknumbers. Also,
* we should store the cookies from the server somewhere,
* to be able to satisfy VOP_READDIR requests for cookies.
* We can't store the cookies in the dirent structure, as some
* other systems.
*
* Each offset is hashed into a per-nfsnode hashtable. An entry
* found therein contains information about the (faked up)
* logical blocknumber, and also a pointer to a buffer where
* the cookies are stored.
*/
extern u_long nfsdirhashmask;
LIST_HEAD(nfsdirhashhead, nfsdircache);
TAILQ_HEAD(nfsdirchainhead, nfsdircache);
struct nfsdircache {
off_t dc_cookie; /* Own offset (key) */
off_t dc_blkcookie; /* Offset of block we're in */
LIST_ENTRY(nfsdircache) dc_hash; /* Hash chain */
TAILQ_ENTRY(nfsdircache) dc_chain; /* Least recently entered chn */
u_int32_t dc_cookie32; /* Key for 64<->32 xlate case */
daddr_t dc_blkno; /* Number of block we're in */
int dc_entry; /* Entry number within block */
};
/*
* The nfsnode is the nfs equivalent to ufs's inode. Any similarity
* is purely coincidental.
* There is a unique nfsnode allocated for each active file,
* each current directory, each mounted-on file, text file, and the root.
* An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
* If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
* type definitions), file handles of > 32 bytes should probably be split out
* into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
* changing the definition in nfsproto.h of NFS_SMALLFH.)
* NB: Hopefully the current order of the fields is such that everything will
* be well aligned and, therefore, tightly packed.
*/
struct nfsnode {
u_quad_t n_size; /* Current size of file */
u_quad_t n_brev; /* Modify rev when cached */
u_quad_t n_lrev; /* Modify rev for lease */
union {
struct timespec nf_mtim;
off_t nd_direof; /* Dir. EOF offset cache */
} n_un2;
union {
struct timespec nf_atim; /* Special file times */
nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */
} n_un1;
union {
struct sillyrename *nf_silly; /* Ptr to silly rename struct */
struct nfsdirhashhead *nd_dircache;
} n_un3;
LIST_ENTRY(nfsnode) n_hash; /* Hash chain */
CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */
struct nfsdirchainhead n_dirchain; /* Chain of dir cookies */
nfsfh_t *n_fhp; /* NFS File Handle */
struct vattr *n_vattr; /* Vnode attribute cache */
struct vnode *n_vnode; /* associated vnode */
struct lockf *n_lockf; /* Locking record of file */
unsigned *n_dirgens; /* 32<->64bit xlate gen. no. */
time_t n_attrstamp; /* Attr. cache timestamp */
time_t n_mtime; /* Prev modify time. */
time_t n_ctime; /* Prev create time. */
time_t n_nctime; /* Last neg cache entry (dir) */
time_t n_expiry; /* Lease expiry time */
daddr_t n_dblkno; /* To keep faked dir blkno */
unsigned n_dircachesize; /* Size of dir cookie cache */
int n_error; /* Save write error value */
short n_fhsize; /* size in bytes, of fh */
short n_flag; /* Flag for locking.. */
nfsfh_t n_fh; /* Small File Handle */
};
#define n_atim n_un1.nf_atim
#define n_mtim n_un2.nf_mtim
#define n_sillyrename n_un3.nf_silly
#define n_cookieverf n_un1.nd_cookieverf
#define n_direofoffset n_un2.nd_direof
#define n_dircache n_un3.nd_dircache
/*
* Flags for n_flag
*/
#define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */
#define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */
#define NMODIFIED 0x0004 /* Might have a modified buffer in bio */
#define NWRITEERR 0x0008 /* Flag write errors so close will know */
#define NQNFSNONCACHE 0x0020 /* Non-cachable lease */
#define NQNFSWRITE 0x0040 /* Write lease */
#define NQNFSEVICTED 0x0080 /* Has been evicted */
#define NACC 0x0100 /* Special file accessed */
#define NUPD 0x0200 /* Special file updated */
#define NCHG 0x0400 /* Special file times changed */
/*
* Convert between nfsnode pointers and vnode pointers
*/
#define VTONFS(vp) ((struct nfsnode *)(vp)->v_data)
#define NFSTOV(np) ((struct vnode *)(np)->n_vnode)
/*
* Queue head for nfsiod's
*/
extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
#ifdef _KERNEL
/*
* Prototypes for NFS vnode operations
*/
int nfs_lookup __P((void *));
int nfs_create __P((void *));
int nfs_mknod __P((void *));
int nfs_open __P((void *));
int nfs_close __P((void *));
int nfsspec_close __P((void *));
int nfsfifo_close __P((void *));
int nfs_access __P((void *));
int nfsspec_access __P((void *));
int nfs_getattr __P((void *));
int nfs_setattr __P((void *));
int nfs_read __P((void *));
int nfs_write __P((void *));
#define nfs_lease_check genfs_nullop
int nfsspec_read __P((void *));
int nfsspec_write __P((void *));
int nfsfifo_read __P((void *));
int nfsfifo_write __P((void *));
#define nfs_ioctl ((int (*) __P((void *)))enoioctl)
#define nfs_poll genfs_poll
#define nfs_revoke genfs_revoke
int nfs_mmap __P((void *));
int nfs_fsync __P((void *));
#define nfs_seek genfs_seek
int nfs_remove __P((void *));
int nfs_link __P((void *));
int nfs_rename __P((void *));
int nfs_mkdir __P((void *));
int nfs_rmdir __P((void *));
int nfs_symlink __P((void *));
int nfs_readdir __P((void *));
int nfs_readlink __P((void *));
#define nfs_abortop genfs_abortop
int nfs_inactive __P((void *));
int nfs_reclaim __P((void *));
#define nfs_lock genfs_nolock
#define nfs_unlock genfs_nounlock
#define nfs_islocked genfs_noislocked
int nfs_bmap __P((void *));
int nfs_strategy __P((void *));
int nfs_print __P((void *));
int nfs_pathconf __P((void *));
int nfs_advlock __P((void *));
#define nfs_blkatoff genfs_eopnotsupp
int nfs_bwrite __P((void *));
int nfs_vget __P((struct mount *, ino_t, struct vnode **));
#define nfs_valloc genfs_eopnotsupp
#define nfs_reallocblks genfs_eopnotsupp
#define nfs_vfree genfs_nullop
int nfs_truncate __P((void *));
int nfs_update __P((void *));
extern int (**nfsv2_vnodeop_p) __P((void *));
#endif /* _KERNEL */
#endif