FreeBSD/Linux Kernel Cross Reference
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_ */

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