nfsnode.h revision 1.49
1 /* $NetBSD: nfsnode.h,v 1.49 2004/09/15 09:50:56 yamt 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfsnode.h 8.9 (Berkeley) 5/14/95 35 */ 36 37 38 #ifndef _NFS_NFSNODE_H_ 39 #define _NFS_NFSNODE_H_ 40 41 #ifndef _NFS_NFS_H_ 42 #include <nfs/nfs.h> 43 #endif 44 #include <miscfs/genfs/genfs.h> 45 #include <miscfs/genfs/genfs_node.h> 46 47 /* 48 * Silly rename structure that hangs off the nfsnode until the name 49 * can be removed by nfs_inactive() 50 */ 51 struct sillyrename { 52 struct ucred *s_cred; 53 struct vnode *s_dvp; 54 long s_namlen; 55 char s_name[20]; 56 }; 57 58 /* 59 * Definitions for the directory cache. Because directory cookies 60 * are an opaque 64 bit entity, we need to provide some sort of 61 * mapping between cookies and logical blocknumbers. Also, 62 * we should store the cookies from the server somewhere, 63 * to be able to satisfy VOP_READDIR requests for cookies. 64 * We can't store the cookies in the dirent structure, as some 65 * other systems. 66 * 67 * Each offset is hashed into a per-nfsnode hashtable. An entry 68 * found therein contains information about the (faked up) 69 * logical blocknumber, and also a pointer to a buffer where 70 * the cookies are stored. 71 */ 72 73 extern u_long nfsdirhashmask; 74 75 LIST_HEAD(nfsdirhashhead, nfsdircache); 76 TAILQ_HEAD(nfsdirchainhead, nfsdircache); 77 78 struct nfsdircache { 79 off_t dc_cookie; /* Own offset (key) */ 80 off_t dc_blkcookie; /* Offset of block we're in */ 81 LIST_ENTRY(nfsdircache) dc_hash; /* Hash chain */ 82 TAILQ_ENTRY(nfsdircache) dc_chain; /* Least recently entered chn */ 83 daddr_t dc_blkno; /* Number of block we're in */ 84 u_int32_t dc_cookie32; /* Key for 64<->32 xlate case */ 85 int dc_entry; /* Entry number within block */ 86 int dc_refcnt; /* Reference count */ 87 int dc_flags; /* NFSDC_ flags */ 88 }; 89 90 #define NFSDC_INVALID 1 91 92 93 /* 94 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 95 * is purely coincidental. 96 * There is a unique nfsnode allocated for each active file, 97 * each current directory, each mounted-on file, text file, and the root. 98 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 99 */ 100 101 struct nfsnode_spec { 102 struct timespec nspec_mtim; /* local mtime */ 103 struct timespec nspec_atim; /* local atime */ 104 }; 105 106 struct nfsnode_reg { 107 off_t nreg_pushedlo; /* 1st blk in commited range */ 108 off_t nreg_pushedhi; /* Last block in range */ 109 off_t nreg_pushlo; /* 1st block in commit range */ 110 off_t nreg_pushhi; /* Last block in range */ 111 struct lock nreg_commitlock; /* Serialize commits XXX */ 112 int nreg_commitflags; 113 int nreg_error; /* Save write error value */ 114 }; 115 116 struct nfsnode_dir { 117 off_t ndir_direof; /* EOF offset cache */ 118 nfsuint64 ndir_cookieverf; /* Cookie verifier */ 119 daddr_t ndir_dblkno; /* faked dir blkno */ 120 struct nfsdirhashhead *ndir_dircache; /* offset -> cache hash heads */ 121 struct nfsdirchainhead ndir_dirchain; /* Chain of dir cookies */ 122 struct timespec ndir_nctime; /* Last neg cache entry */ 123 unsigned ndir_dircachesize; /* Size of dir cookie cache */ 124 }; 125 126 struct nfsnode { 127 struct genfs_node n_gnode; 128 u_quad_t n_size; /* Current size of file */ 129 130 union { 131 struct nfsnode_spec nu_spec; 132 struct nfsnode_reg nu_reg; 133 struct nfsnode_dir nu_dir; 134 } n_un1; 135 136 #define n_mtim n_un1.nu_spec.nspec_mtim 137 #define n_atim n_un1.nu_spec.nspec_atim 138 139 #define n_pushedlo n_un1.nu_reg.nreg_pushedlo 140 #define n_pushedhi n_un1.nu_reg.nreg_pushedhi 141 #define n_pushlo n_un1.nu_reg.nreg_pushlo 142 #define n_pushhi n_un1.nu_reg.nreg_pushhi 143 #define n_commitlock n_un1.nu_reg.nreg_commitlock 144 #define n_commitflags n_un1.nu_reg.nreg_commitflags 145 #define n_error n_un1.nu_reg.nreg_error 146 147 #define n_direofoffset n_un1.nu_dir.ndir_direof 148 #define n_cookieverf n_un1.nu_dir.ndir_cookieverf 149 #define n_dblkno n_un1.nu_dir.ndir_dblkno 150 #define n_dircache n_un1.nu_dir.ndir_dircache 151 #define n_dirchain n_un1.nu_dir.ndir_dirchain 152 #define n_nctime n_un1.nu_dir.ndir_nctime 153 #define n_dircachesize n_un1.nu_dir.ndir_dircachesize 154 155 union { 156 struct sillyrename *nf_silly; /* !VDIR: silly rename struct */ 157 unsigned *ndir_dirgens; /* 32<->64bit xlate gen. no. */ 158 } n_un2; 159 160 #define n_sillyrename n_un2.nf_silly 161 #define n_dirgens n_un2.ndir_dirgens 162 163 LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ 164 nfsfh_t *n_fhp; /* NFS File Handle */ 165 struct vattr *n_vattr; /* Vnode attribute cache */ 166 struct vnode *n_vnode; /* associated vnode */ 167 struct lockf *n_lockf; /* Locking record of file */ 168 time_t n_attrstamp; /* Attr. cache timestamp */ 169 struct timespec n_mtime; /* Prev modify time. */ 170 time_t n_ctime; /* Prev create time. */ 171 short n_fhsize; /* size in bytes, of fh */ 172 short n_flag; /* Flag for locking.. */ 173 nfsfh_t n_fh; /* Small File Handle */ 174 time_t n_accstamp; /* Access cache timestamp */ 175 uid_t n_accuid; /* Last access requester */ 176 int n_accmode; /* Mode last requested */ 177 int n_accerror; /* Error last returned */ 178 struct ucred *n_rcred; 179 struct ucred *n_wcred; 180 181 /* members below are only used by NQNFS */ 182 CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */ 183 u_quad_t n_brev; /* Modify rev when cached */ 184 u_quad_t n_lrev; /* Modify rev for lease */ 185 time_t n_expiry; /* Lease expiry time */ 186 }; 187 LIST_HEAD(nfsnodehashhead, nfsnode); 188 189 /* 190 * Values for n_commitflags 191 */ 192 #define NFS_COMMIT_PUSH_VALID 0x0001 /* push range valid */ 193 #define NFS_COMMIT_PUSHED_VALID 0x0002 /* pushed range valid */ 194 195 /* 196 * Flags for n_flag 197 */ 198 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 199 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 200 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 201 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 202 #define NQNFSNONCACHE 0x0020 /* Non-cachable lease */ 203 #define NQNFSWRITE 0x0040 /* Write lease */ 204 #define NQNFSEVICTED 0x0080 /* Has been evicted */ 205 #define NACC 0x0100 /* Special file accessed */ 206 #define NUPD 0x0200 /* Special file updated */ 207 #define NCHG 0x0400 /* Special file times changed */ 208 #define NTRUNCDELAYED 0x1000 /* Should be truncated later */ 209 #define NREMOVED 0x2000 /* Has been removed */ 210 #define NUSEOPENCRED 0x4000 /* Try open cred first rather than owner's */ 211 212 /* 213 * Convert between nfsnode pointers and vnode pointers 214 */ 215 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 216 #define NFSTOV(np) ((np)->n_vnode) 217 218 /* 219 * Per-nfsiod datas 220 */ 221 struct nfs_iod { 222 struct simplelock nid_slock; 223 struct proc *nid_proc; 224 struct proc *nid_want; 225 struct nfsmount *nid_mount; 226 }; 227 extern struct nfs_iod nfs_asyncdaemon[NFS_MAXASYNCDAEMON]; 228 229 #ifdef _KERNEL 230 /* 231 * Prototypes for NFS vnode operations 232 */ 233 int nfs_lookup __P((void *)); 234 int nfs_create __P((void *)); 235 int nfs_mknod __P((void *)); 236 int nfs_open __P((void *)); 237 int nfs_close __P((void *)); 238 int nfsspec_close __P((void *)); 239 int nfsfifo_close __P((void *)); 240 int nfs_access __P((void *)); 241 int nfsspec_access __P((void *)); 242 int nfs_getattr __P((void *)); 243 int nfs_setattr __P((void *)); 244 int nfs_read __P((void *)); 245 int nfs_write __P((void *)); 246 #define nfs_lease_check genfs_nullop 247 int nfsspec_read __P((void *)); 248 int nfsspec_write __P((void *)); 249 int nfsfifo_read __P((void *)); 250 int nfsfifo_write __P((void *)); 251 #define nfs_ioctl genfs_enoioctl 252 #define nfs_poll genfs_poll 253 #define nfs_revoke genfs_revoke 254 #define nfs_mmap genfs_mmap 255 int nfs_fsync __P((void *)); 256 #define nfs_seek genfs_seek 257 int nfs_remove __P((void *)); 258 int nfs_link __P((void *)); 259 int nfs_rename __P((void *)); 260 int nfs_mkdir __P((void *)); 261 int nfs_rmdir __P((void *)); 262 int nfs_symlink __P((void *)); 263 int nfs_readdir __P((void *)); 264 int nfs_readlink __P((void *)); 265 #define nfs_abortop genfs_abortop 266 int nfs_inactive __P((void *)); 267 int nfs_reclaim __P((void *)); 268 #define nfs_lock genfs_lock 269 int nfs_unlock __P((void *)); 270 #define nfs_islocked genfs_islocked 271 int nfs_bmap __P((void *)); 272 int nfs_strategy __P((void *)); 273 int nfs_print __P((void *)); 274 int nfs_pathconf __P((void *)); 275 int nfs_advlock __P((void *)); 276 #define nfs_blkatoff genfs_eopnotsupp 277 int nfs_bwrite __P((void *)); 278 #define nfs_valloc genfs_eopnotsupp 279 #define nfs_reallocblks genfs_eopnotsupp 280 #define nfs_vfree genfs_nullop 281 int nfs_truncate __P((void *)); 282 int nfs_getpages __P((void *)); 283 int nfs_putpages __P((void *)); 284 int nfs_gop_write(struct vnode *, struct vm_page **, int, int); 285 int nfs_kqfilter __P((void *)); 286 287 extern int (**nfsv2_vnodeop_p) __P((void *)); 288 289 #define NFS_INVALIDATE_ATTRCACHE(np) (np)->n_attrstamp = 0 290 291 #endif /* _KERNEL */ 292 293 #endif 294
Indexes created Thu Sep 25 08:09:54 GMT 2025