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a62dc40654
HardenedBSD/sys/nfs/nfsnode.h
Doug Rabson a62dc40654 Changes to support version 3 of the NFS protocol. 
The version 2 support has been tested (client+server) against FreeBSD-2.0,
IRIX 5.3 and FreeBSD-current (using a loopback mount).  The version 2 support
is stable AFAIK.
The version 3 support has been tested with a loopback mount and minimally
against an IRIX 5.3 server.  It needs more testing and may have problems.
I have patched amd to support the new variable length filehandles although
it will still only use version 2 of the protocol.

Before booting a kernel with these changes, nfs clients will need to at least
build and install /usr/sbin/mount_nfs.  Servers will need to build and
install /usr/sbin/mountd.

NFS diskless support is untested.

Obtained from: Rick Macklem <rick@snowhite.cis.uoguelph.ca>
1995-06-27 11:07:30 +00:00

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/*
* 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 8.4 (Berkeley) 2/13/94
* $Id: nfsnode.h,v 1.9 1995/03/16 18:15:42 bde Exp $
*/
#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];
};
/*
* This structure is used to save the logical directory offset to
* NFS cookie mappings.
* The mappings are stored in a list headed
* by n_cookies, as required.
* There is one mapping for each NFS_DIRBLKSIZ bytes of directory information
* stored in increasing logical offset byte order.
*/
#define NFSNUMCOOKIES 31
struct nfsdmap {
LIST_ENTRY(nfsdmap) ndm_list;
int ndm_eocookie;
nfsuint64 ndm_cookies[NFSNUMCOOKIES];
};
/*
* 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 sys/mount.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 {
LIST_ENTRY(nfsnode) n_hash; /* Hash chain */
CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */
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 */
struct vattr n_vattr; /* Vnode attribute cache */
time_t n_attrstamp; /* Attr. cache timestamp */
time_t n_mtime; /* Prev modify time. */
time_t n_ctime; /* Prev create time. */
time_t n_expiry; /* Lease expiry time */
nfsfh_t *n_fhp; /* NFS File Handle */
struct vnode *n_vnode; /* associated vnode */
struct lockf *n_lockf; /* Locking record of file */
int n_error; /* Save write error value */
union {
struct timespec nf_atim; /* Special file times */
nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */
} n_un1;
union {
struct timespec nf_mtim;
off_t nd_direof; /* Dir. EOF offset cache */
} n_un2;
union {
struct sillyrename *nf_silly; /* Ptr to silly rename struct */
LIST_HEAD(, nfsdmap) nd_cook; /* cookies */
} n_un3;
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_cookies n_un3.nd_cook
/*
* 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 */
#define NLOCKED 0x0800 /* node is locked */
#define NWANTED 0x0100 /* someone wants to lock */
/*
* 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
*/
TAILQ_HEAD(, buf) nfs_bufq;
#if defined(KERNEL) || defined(_KERNEL)
extern int (**fifo_nfsv2nodeop_p)();
extern int (**nfsv2_vnodeop_p)();
extern int (**spec_nfsv2nodeop_p)();
/*
* Prototypes for NFS vnode operations
*/
int nfs_lookup __P((struct vop_lookup_args *));
int nfs_create __P((struct vop_create_args *));
int nfs_mknod __P((struct vop_mknod_args *));
int nfs_open __P((struct vop_open_args *));
int nfs_close __P((struct vop_close_args *));
int nfsspec_close __P((struct vop_close_args *));
int nfsfifo_close __P((struct vop_close_args *));
int nfs_access __P((struct vop_access_args *));
int nfsspec_access __P((struct vop_access_args *));
int nfs_getattr __P((struct vop_getattr_args *));
int nfs_setattr __P((struct vop_setattr_args *));
int nfs_read __P((struct vop_read_args *));
int nfs_write __P((struct vop_write_args *));
#ifdef HAS_VOPLEASE
#define nfs_lease_check ((int (*) __P((struct vop_lease_args *)))nullop)
#define nqnfs_vop_lease_check lease_check
#else
#ifdef __FreeBSD__
#define nqnfs_lease_check nfs_lease_check
#else
#define nqnfs_lease_check lease_check
#endif
#endif
int nfsspec_read __P((struct vop_read_args *));
int nfsspec_write __P((struct vop_write_args *));
int nfsfifo_read __P((struct vop_read_args *));
int nfsfifo_write __P((struct vop_write_args *));
#define nfs_ioctl ((int (*) __P((struct vop_ioctl_args *)))enoioctl)
#define nfs_select ((int (*) __P((struct vop_select_args *)))seltrue)
#ifdef HAS_VOPREVOKE
#define nfs_revoke vop_revoke
#endif
int nfs_mmap __P((struct vop_mmap_args *));
int nfs_fsync __P((struct vop_fsync_args *));
#define nfs_seek ((int (*) __P((struct vop_seek_args *)))nullop)
int nfs_remove __P((struct vop_remove_args *));
int nfs_link __P((struct vop_link_args *));
int nfs_rename __P((struct vop_rename_args *));
int nfs_mkdir __P((struct vop_mkdir_args *));
int nfs_rmdir __P((struct vop_rmdir_args *));
int nfs_symlink __P((struct vop_symlink_args *));
int nfs_readdir __P((struct vop_readdir_args *));
int nfs_readlink __P((struct vop_readlink_args *));
int nfs_abortop __P((struct vop_abortop_args *));
int nfs_inactive __P((struct vop_inactive_args *));
int nfs_reclaim __P((struct vop_reclaim_args *));
int nfs_lock __P((struct vop_lock_args *));
int nfs_unlock __P((struct vop_unlock_args *));
int nfs_bmap __P((struct vop_bmap_args *));
int nfs_strategy __P((struct vop_strategy_args *));
int nfs_print __P((struct vop_print_args *));
int nfs_islocked __P((struct vop_islocked_args *));
int nfs_pathconf __P((struct vop_pathconf_args *));
int nfs_advlock __P((struct vop_advlock_args *));
int nfs_blkatoff __P((struct vop_blkatoff_args *));
int nfs_bwrite __P((struct vop_bwrite_args *));
int nfs_vget __P((struct mount *, ino_t, struct vnode **));
int nfs_valloc __P((struct vop_valloc_args *));
#define nfs_reallocblks \
((int (*) __P((struct vop_reallocblks_args *)))eopnotsupp)
int nfs_vfree __P((struct vop_vfree_args *));
int nfs_truncate __P((struct vop_truncate_args *));
int nfs_update __P((struct vop_update_args *));
/* other stuff */
int nfs_removeit __P((struct sillyrename *));
int nfs_nget __P((struct mount *,nfsfh_t *,int,struct nfsnode **));
int nfs_lookitup __P((struct vnode *,char *,int,struct ucred *,struct proc *,struct nfsnode **));
int nfs_sillyrename __P((struct vnode *,struct vnode *,struct componentname *));
nfsuint64 *nfs_getcookie __P((struct nfsnode *, off_t, int));
void nfs_invaldir __P((struct vnode *));
#ifdef __FreeBSD__
#define nqnfs_lease_updatetime nfs_lease_updatetime
#else
#define nqnfs_lease_updatetime lease_updatetime
#endif
#endif /* KERNEL */
#endif
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