nfsnode.h revision 1.20
1 /* $NetBSD: nfsnode.h,v 1.20 1997/04/11 21:52:07 kleink 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 * This structure is used to save the logical directory offset to 62 * NFS cookie mappings. 63 * The mappings are stored in a list headed 64 * by n_cookies, as required. 65 * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information 66 * stored in increasing logical offset byte order. 67 */ 68 #define NFSNUMCOOKIES 31 69 70 struct nfsdmap { 71 LIST_ENTRY(nfsdmap) ndm_list; 72 int ndm_eocookie; 73 nfsuint64 ndm_cookies[NFSNUMCOOKIES]; 74 }; 75 76 /* 77 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 78 * is purely coincidental. 79 * There is a unique nfsnode allocated for each active file, 80 * each current directory, each mounted-on file, text file, and the root. 81 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 82 * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite 83 * type definitions), file handles of > 32 bytes should probably be split out 84 * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by 85 * changing the definition in sys/mount.h of NFS_SMALLFH.) 86 * NB: Hopefully the current order of the fields is such that everything will 87 * be well aligned and, therefore, tightly packed. 88 */ 89 struct nfsnode { 90 LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ 91 CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */ 92 u_quad_t n_size; /* Current size of file */ 93 u_quad_t n_brev; /* Modify rev when cached */ 94 u_quad_t n_lrev; /* Modify rev for lease */ 95 struct vattr n_vattr; /* Vnode attribute cache */ 96 time_t n_attrstamp; /* Attr. cache timestamp */ 97 time_t n_mtime; /* Prev modify time. */ 98 time_t n_ctime; /* Prev create time. */ 99 time_t n_expiry; /* Lease expiry time */ 100 nfsfh_t *n_fhp; /* NFS File Handle */ 101 struct vnode *n_vnode; /* associated vnode */ 102 struct lockf *n_lockf; /* Locking record of file */ 103 int n_error; /* Save write error value */ 104 union { 105 struct timespec nf_atim; /* Special file times */ 106 nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */ 107 } n_un1; 108 union { 109 struct timespec nf_mtim; 110 off_t nd_direof; /* Dir. EOF offset cache */ 111 } n_un2; 112 union { 113 struct sillyrename *nf_silly; /* Ptr to silly rename struct */ 114 LIST_HEAD(, nfsdmap) nd_cook; /* cookies */ 115 } n_un3; 116 short n_fhsize; /* size in bytes, of fh */ 117 short n_flag; /* Flag for locking.. */ 118 nfsfh_t n_fh; /* Small File Handle */ 119 }; 120 121 #define n_atim n_un1.nf_atim 122 #define n_mtim n_un2.nf_mtim 123 #define n_sillyrename n_un3.nf_silly 124 #define n_cookieverf n_un1.nd_cookieverf 125 #define n_direofoffset n_un2.nd_direof 126 #define n_cookies n_un3.nd_cook 127 128 /* 129 * Flags for n_flag 130 */ 131 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 132 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 133 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 134 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 135 #define NQNFSNONCACHE 0x0020 /* Non-cachable lease */ 136 #define NQNFSWRITE 0x0040 /* Write lease */ 137 #define NQNFSEVICTED 0x0080 /* Has been evicted */ 138 #define NACC 0x0100 /* Special file accessed */ 139 #define NUPD 0x0200 /* Special file updated */ 140 #define NCHG 0x0400 /* Special file times changed */ 141 142 /* 143 * Convert between nfsnode pointers and vnode pointers 144 */ 145 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 146 #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) 147 148 /* 149 * Queue head for nfsiod's 150 */ 151 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 152 extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; 153 154 #ifdef _KERNEL 155 /* 156 * Prototypes for NFS vnode operations 157 */ 158 int nfs_lookup __P((void *)); 159 int nfs_create __P((void *)); 160 int nfs_mknod __P((void *)); 161 int nfs_open __P((void *)); 162 int nfs_close __P((void *)); 163 int nfsspec_close __P((void *)); 164 int nfsfifo_close __P((void *)); 165 int nfs_access __P((void *)); 166 int nfsspec_access __P((void *)); 167 int nfs_getattr __P((void *)); 168 int nfs_setattr __P((void *)); 169 int nfs_read __P((void *)); 170 int nfs_write __P((void *)); 171 #define nfs_lease_check genfs_nullop 172 #define nqnfs_vop_lease_check lease_check 173 int nfsspec_read __P((void *)); 174 int nfsspec_write __P((void *)); 175 int nfsfifo_read __P((void *)); 176 int nfsfifo_write __P((void *)); 177 #define nfs_ioctl ((int (*) __P((void *)))enoioctl) 178 #define nfs_poll genfs_poll 179 #ifdef Lite2_integrated 180 #define nfs_revoke vop_revoke 181 #endif 182 int nfs_mmap __P((void *)); 183 int nfs_fsync __P((void *)); 184 #define nfs_seek genfs_seek 185 int nfs_remove __P((void *)); 186 int nfs_link __P((void *)); 187 int nfs_rename __P((void *)); 188 int nfs_mkdir __P((void *)); 189 int nfs_rmdir __P((void *)); 190 int nfs_symlink __P((void *)); 191 int nfs_readdir __P((void *)); 192 int nfs_readlink __P((void *)); 193 #define nfs_abortop genfs_abortop 194 int nfs_inactive __P((void *)); 195 int nfs_reclaim __P((void *)); 196 #ifdef Lite2_integrated 197 #define nfs_lock ((int (*) __P((void *)))vop_nolock) 198 #define nfs_unlock ((int (*) __P((void *)))vop_nounlock) 199 #define nfs_islocked ((int (*) __P((void *)))vop_noislocked) 200 #else 201 int nfs_lock __P((void *)); 202 int nfs_unlock __P((void *)); 203 int nfs_islocked __P((void *)); 204 #endif /* Lite2_integrated */ 205 int nfs_bmap __P((void *)); 206 int nfs_strategy __P((void *)); 207 int nfs_print __P((void *)); 208 int nfs_pathconf __P((void *)); 209 int nfs_advlock __P((void *)); 210 #define nfs_blkatoff genfs_eopnotsupp 211 int nfs_bwrite __P((void *)); 212 int nfs_vget __P((struct mount *, ino_t, struct vnode **)); 213 #define nfs_valloc genfs_eopnotsupp 214 #define nfs_reallocblks genfs_eopnotsupp 215 #define nfs_vfree genfs_nullop 216 int nfs_truncate __P((void *)); 217 int nfs_update __P((void *)); 218 219 extern int (**nfsv2_vnodeop_p) __P((void *)); 220 221 #endif /* _KERNEL */ 222 223 #endif 224
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