nfsnode.h revision 1.27
1 /* $NetBSD: nfsnode.h,v 1.27 1998/08/10 08:11:13 matthias Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfsnode.h 8.9 (Berkeley) 5/14/95 39 */ 40 41 42 #ifndef _NFS_NFSNODE_H_ 43 #define _NFS_NFSNODE_H_ 44 45 #ifndef _NFS_NFS_H_ 46 #include <nfs/nfs.h> 47 #endif 48 49 /* 50 * Silly rename structure that hangs off the nfsnode until the name 51 * can be removed by nfs_inactive() 52 */ 53 struct sillyrename { 54 struct ucred *s_cred; 55 struct vnode *s_dvp; 56 long s_namlen; 57 char s_name[20]; 58 }; 59 60 /* 61 * Definitions for the directory cache. Because directory cookies 62 * are an opaque 64 bit entity, we need to provide some sort of 63 * mapping between cookies and logical blocknumbers. Also, 64 * we should store the cookies from the server somewhere, 65 * to be able to satisfy VOP_READDIR requests for cookies. 66 * We can't store the cookies in the dirent structure, as some 67 * other systems. 68 * 69 * Each offset is hashed into a per-nfsnode hashtable. An entry 70 * found therein contains information about the (faked up) 71 * logical blocknumber, and also a pointer to a buffer where 72 * the cookies are stored. 73 */ 74 75 extern u_long nfsdirhashmask; 76 77 LIST_HEAD(nfsdirhashhead, nfsdircache); 78 TAILQ_HEAD(nfsdirchainhead, nfsdircache); 79 80 struct nfsdircache { 81 off_t dc_cookie; /* Own offset (key) */ 82 off_t dc_blkcookie; /* Offset of block we're in */ 83 LIST_ENTRY(nfsdircache) dc_hash; /* Hash chain */ 84 TAILQ_ENTRY(nfsdircache) dc_chain; /* Least recently entered chn */ 85 u_int32_t dc_cookie32; /* Key for 64<->32 xlate case */ 86 daddr_t dc_blkno; /* Number of block we're in */ 87 int dc_entry; /* Entry number within block */ 88 }; 89 90 91 /* 92 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 93 * is purely coincidental. 94 * There is a unique nfsnode allocated for each active file, 95 * each current directory, each mounted-on file, text file, and the root. 96 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 97 * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite 98 * type definitions), file handles of > 32 bytes should probably be split out 99 * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by 100 * changing the definition in nfsproto.h of NFS_SMALLFH.) 101 * NB: Hopefully the current order of the fields is such that everything will 102 * be well aligned and, therefore, tightly packed. 103 */ 104 struct nfsnode { 105 u_quad_t n_size; /* Current size of file */ 106 u_quad_t n_brev; /* Modify rev when cached */ 107 u_quad_t n_lrev; /* Modify rev for lease */ 108 union { 109 struct timespec nf_mtim; 110 off_t nd_direof; /* Dir. EOF offset cache */ 111 } n_un2; 112 union { 113 struct timespec nf_atim; /* Special file times */ 114 nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */ 115 } n_un1; 116 union { 117 struct sillyrename *nf_silly; /* Ptr to silly rename struct */ 118 struct nfsdirhashhead *nd_dircache; 119 } n_un3; 120 LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ 121 CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */ 122 struct nfsdirchainhead n_dirchain; /* Chain of dir cookies */ 123 nfsfh_t *n_fhp; /* NFS File Handle */ 124 struct vattr *n_vattr; /* Vnode attribute cache */ 125 struct vnode *n_vnode; /* associated vnode */ 126 struct lockf *n_lockf; /* Locking record of file */ 127 unsigned *n_dirgens; /* 32<->64bit xlate gen. no. */ 128 time_t n_attrstamp; /* Attr. cache timestamp */ 129 time_t n_mtime; /* Prev modify time. */ 130 time_t n_ctime; /* Prev create time. */ 131 time_t n_nctime; /* Last neg cache entry (dir) */ 132 time_t n_expiry; /* Lease expiry time */ 133 daddr_t n_dblkno; /* To keep faked dir blkno */ 134 unsigned n_dircachesize; /* Size of dir cookie cache */ 135 int n_error; /* Save write error value */ 136 short n_fhsize; /* size in bytes, of fh */ 137 short n_flag; /* Flag for locking.. */ 138 nfsfh_t n_fh; /* Small File Handle */ 139 }; 140 141 #define n_atim n_un1.nf_atim 142 #define n_mtim n_un2.nf_mtim 143 #define n_sillyrename n_un3.nf_silly 144 #define n_cookieverf n_un1.nd_cookieverf 145 #define n_direofoffset n_un2.nd_direof 146 #define n_dircache n_un3.nd_dircache 147 148 /* 149 * Flags for n_flag 150 */ 151 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 152 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 153 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 154 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 155 #define NQNFSNONCACHE 0x0020 /* Non-cachable lease */ 156 #define NQNFSWRITE 0x0040 /* Write lease */ 157 #define NQNFSEVICTED 0x0080 /* Has been evicted */ 158 #define NACC 0x0100 /* Special file accessed */ 159 #define NUPD 0x0200 /* Special file updated */ 160 #define NCHG 0x0400 /* Special file times changed */ 161 162 /* 163 * Convert between nfsnode pointers and vnode pointers 164 */ 165 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 166 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) 167 168 /* 169 * Queue head for nfsiod's 170 */ 171 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 172 extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 173 174 #ifdef _KERNEL 175 /* 176 * Prototypes for NFS vnode operations 177 */ 178 int nfs_lookup __P((void *)); 179 int nfs_create __P((void *)); 180 int nfs_mknod __P((void *)); 181 int nfs_open __P((void *)); 182 int nfs_close __P((void *)); 183 int nfsspec_close __P((void *)); 184 int nfsfifo_close __P((void *)); 185 int nfs_access __P((void *)); 186 int nfsspec_access __P((void *)); 187 int nfs_getattr __P((void *)); 188 int nfs_setattr __P((void *)); 189 int nfs_read __P((void *)); 190 int nfs_write __P((void *)); 191 #define nfs_lease_check genfs_nullop 192 int nfsspec_read __P((void *)); 193 int nfsspec_write __P((void *)); 194 int nfsfifo_read __P((void *)); 195 int nfsfifo_write __P((void *)); 196 #define nfs_ioctl genfs_enoioctl 197 #define nfs_poll genfs_poll 198 #define nfs_revoke genfs_revoke 199 int nfs_mmap __P((void *)); 200 int nfs_fsync __P((void *)); 201 #define nfs_seek genfs_seek 202 int nfs_remove __P((void *)); 203 int nfs_link __P((void *)); 204 int nfs_rename __P((void *)); 205 int nfs_mkdir __P((void *)); 206 int nfs_rmdir __P((void *)); 207 int nfs_symlink __P((void *)); 208 int nfs_readdir __P((void *)); 209 int nfs_readlink __P((void *)); 210 #define nfs_abortop genfs_abortop 211 int nfs_inactive __P((void *)); 212 int nfs_reclaim __P((void *)); 213 #define nfs_lock genfs_nolock 214 #define nfs_unlock genfs_nounlock 215 #define nfs_islocked genfs_noislocked 216 int nfs_bmap __P((void *)); 217 int nfs_strategy __P((void *)); 218 int nfs_print __P((void *)); 219 int nfs_pathconf __P((void *)); 220 int nfs_advlock __P((void *)); 221 #define nfs_blkatoff genfs_eopnotsupp 222 int nfs_bwrite __P((void *)); 223 int nfs_vget __P((struct mount *, ino_t, struct vnode **)); 224 #define nfs_valloc genfs_eopnotsupp 225 #define nfs_reallocblks genfs_eopnotsupp 226 #define nfs_vfree genfs_nullop 227 int nfs_truncate __P((void *)); 228 int nfs_update __P((void *)); 229 230 extern int (**nfsv2_vnodeop_p) __P((void *)); 231 232 #endif /* _KERNEL */ 233 234 #endif 235
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