IABSD.fr/src/sys/nfs/nfsnode.h

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• Author : jsg
  Date : 2021-03-11 13:31:35
  Hash : b66b9ef8
  Message : spelling

• sys/nfs/nfsnode.h

• /*	$OpenBSD: nfsnode.h,v 1.42 2021/03/11 13:31:35 jsg Exp $	*/
  /*	$NetBSD: nfsnode.h,v 1.16 1996/02/18 11:54:04 fvdl 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. 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
  
  #include <sys/lock.h>
  
  /*
   * 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[24];
  };
  
  /*
   * 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 {
  	RB_ENTRY(nfsnode)	n_entry;	/* filehandle/node tree. */
  	u_quad_t		n_size;		/* Current size of file */
  	struct vattr		n_vattr;	/* Vnode attribute cache */
  	time_t			n_attrstamp;	/* Attr. cache timestamp */
  	struct timespec 	n_mtime;	/* Prev modify time. */
  	time_t			n_ctime;	/* Prev create time. */
  	nfsfh_t			*n_fhp;		/* NFS File Handle */
  	struct vnode		*n_vnode;	/* associated vnode */
  	struct lockf_state	*n_lockf;	/* Locking record of file */
  	struct rrwlock		n_lock;		/* NFSnode lock */
  	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;
  	struct sillyrename	*n_sillyrename;	/* Ptr to silly rename struct */
  	short			n_fhsize;	/* size in bytes, of fh */
  	short			n_flag;		/* Flag for locking.. */
  	nfsfh_t			n_fh;		/* Small File Handle */
  	time_t			n_accstamp;	/* Access cache timestamp */
  	uid_t			n_accuid;	/* Last access requester */
  	int			n_accmode;	/* Last mode requested */
  	int			n_accerror;	/* Last returned error */
  	struct ucred		*n_rcred;
  	struct ucred		*n_wcred;
  
  	off_t			n_pushedlo;	/* 1st blk in committed range */
  	off_t			n_pushedhi;	/* Last block in range */
  	off_t			n_pushlo;	/* 1st block in commit range */
  	off_t			n_pushhi;	/* Last block in range */
  	struct rwlock		n_commitlock;	/* Serialize commits */
  	int			n_commitflags;
  };
  
  /*
   * Values for n_commitflags
   */
  #define NFS_COMMIT_PUSH_VALID   0x0001          /* push range valid */
  #define NFS_COMMIT_PUSHED_VALID 0x0002          /* pushed range valid */
  
  #define n_atim		n_un1.nf_atim
  #define n_mtim		n_un2.nf_mtim
  #define n_cookieverf	n_un1.nd_cookieverf
  #define n_direofoffset	n_un2.nd_direof
  
  /*
   * 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	NACC		0x0100	/* Special file accessed */
  #define	NUPD		0x0200	/* Special file updated */
  #define	NCHG		0x0400	/* Special file times changed */
  
  #define NFS_INVALIDATE_ATTRCACHE(np)	((np)->n_attrstamp = 0)
  
  /*
   * Convert between nfsnode pointers and vnode pointers
   */
  #define VTONFS(vp)	((struct nfsnode *)(vp)->v_data)
  #define NFSTOV(np)	((np)->n_vnode)
  
  /*
   * Queue head for nfsiod's
   */
  extern TAILQ_HEAD(nfs_bufqhead, buf) nfs_bufq;
  extern uint32_t nfs_bufqlen, nfs_bufqmax;
  
  #endif		/* _NFS_NFSNODE_H_ */