1 /* $OpenBSD: nfsnode.h,v 1.38 2009/09/02 18:20:54 thib Exp $ */ 2 /* $NetBSD: nfsnode.h,v 1.16 1996/02/18 11:54:04 fvdl Exp $ */ 3 4 /* 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Rick Macklem at The University of Guelph. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nfsnode.h 8.9 (Berkeley) 5/14/95 36 */ 37 38 39 #ifndef _NFS_NFSNODE_H_ 40 #define _NFS_NFSNODE_H_ 41 42 #ifndef _NFS_NFS_H_ 43 #include <nfs/nfs.h> 44 #endif 45 46 #include <sys/rwlock.h> 47 48 /* 49 * Silly rename structure that hangs off the nfsnode until the name 50 * can be removed by nfs_inactive() 51 */ 52 struct sillyrename { 53 struct ucred *s_cred; 54 struct vnode *s_dvp; 55 long s_namlen; 56 char s_name[20]; 57 }; 58 59 /* 60 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 61 * is purely coincidental. 62 * There is a unique nfsnode allocated for each active file, 63 * each current directory, each mounted-on file, text file, and the root. 64 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 65 * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite 66 * type definitions), file handles of > 32 bytes should probably be split out 67 * into a separate malloc()'d data structure. (Reduce the size of nfsfh_t by 68 * changing the definition in sys/mount.h of NFS_SMALLFH.) 69 * NB: Hopefully the current order of the fields is such that everything will 70 * be well aligned and, therefore, tightly packed. 71 */ 72 struct nfsnode { 73 RB_ENTRY(nfsnode) n_entry; /* filehandle/node tree. */ 74 u_quad_t n_size; /* Current size of file */ 75 struct vattr n_vattr; /* Vnode attribute cache */ 76 time_t n_attrstamp; /* Attr. cache timestamp */ 77 struct timespec n_mtime; /* Prev modify time. */ 78 time_t n_ctime; /* Prev create time. */ 79 nfsfh_t *n_fhp; /* NFS File Handle */ 80 struct vnode *n_vnode; /* associated vnode */ 81 struct lockf *n_lockf; /* Locking record of file */ 82 int n_error; /* Save write error value */ 83 union { 84 struct timespec nf_atim; /* Special file times */ 85 nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */ 86 } n_un1; 87 union { 88 struct timespec nf_mtim; 89 off_t nd_direof; /* Dir. EOF offset cache */ 90 } n_un2; 91 struct sillyrename *n_sillyrename; /* Ptr to silly rename struct */ 92 short n_fhsize; /* size in bytes, of fh */ 93 short n_flag; /* Flag for locking.. */ 94 nfsfh_t n_fh; /* Small File Handle */ 95 time_t n_accstamp; /* Access cache timestamp */ 96 uid_t n_accuid; /* Last access requester */ 97 int n_accmode; /* Last mode requested */ 98 int n_accerror; /* Last returned error */ 99 struct ucred *n_rcred; 100 struct ucred *n_wcred; 101 102 off_t n_pushedlo; /* 1st blk in commited range */ 103 off_t n_pushedhi; /* Last block in range */ 104 off_t n_pushlo; /* 1st block in commit range */ 105 off_t n_pushhi; /* Last block in range */ 106 struct rwlock n_commitlock; /* Serialize commits */ 107 int n_commitflags; 108 }; 109 110 /* 111 * Values for n_commitflags 112 */ 113 #define NFS_COMMIT_PUSH_VALID 0x0001 /* push range valid */ 114 #define NFS_COMMIT_PUSHED_VALID 0x0002 /* pushed range valid */ 115 116 #define n_atim n_un1.nf_atim 117 #define n_mtim n_un2.nf_mtim 118 #define n_cookieverf n_un1.nd_cookieverf 119 #define n_direofoffset n_un2.nd_direof 120 121 /* 122 * Flags for n_flag 123 */ 124 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 125 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 126 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 127 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 128 #define NACC 0x0100 /* Special file accessed */ 129 #define NUPD 0x0200 /* Special file updated */ 130 #define NCHG 0x0400 /* Special file times changed */ 131 132 #define NFS_INVALIDATE_ATTRCACHE(np) ((np)->n_attrstamp = 0) 133 134 /* 135 * Convert between nfsnode pointers and vnode pointers 136 */ 137 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 138 #define NFSTOV(np) ((np)->n_vnode) 139 140 /* 141 * Queue head for nfsiod's 142 */ 143 extern TAILQ_HEAD(nfs_bufqhead, buf) nfs_bufq; 144 extern uint32_t nfs_bufqlen, nfs_bufqmax; 145 146 #endif /* _NFS_NFSNODE_H_ */ 147