nfsnode.h revision 1.68
1 /* $NetBSD: nfsnode.h,v 1.68 2008/10/22 11:36:06 matt 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 #include <sys/condvar.h> 42 #include <sys/mutex.h> 43 #include <sys/rb.h> 44 45 #ifndef _NFS_NFS_H_ 46 #include <nfs/nfs.h> 47 #endif 48 #include <miscfs/genfs/genfs.h> 49 #include <miscfs/genfs/genfs_node.h> 50 51 /* 52 * Silly rename structure that hangs off the nfsnode until the name 53 * can be removed by nfs_inactive() 54 */ 55 struct sillyrename { 56 kauth_cred_t s_cred; 57 struct vnode *s_dvp; 58 long s_namlen; 59 char s_name[20]; 60 }; 61 62 /* 63 * Definitions for the directory cache. Because directory cookies 64 * are an opaque 64 bit entity, we need to provide some sort of 65 * mapping between cookies and logical blocknumbers. Also, 66 * we should store the cookies from the server somewhere, 67 * to be able to satisfy VOP_READDIR requests for cookies. 68 * We can't store the cookies in the dirent structure, as some 69 * other systems. 70 * 71 * Each offset is hashed into a per-nfsnode hashtable. An entry 72 * found therein contains information about the (faked up) 73 * logical blocknumber, and also a pointer to a buffer where 74 * the cookies are stored. 75 */ 76 77 78 LIST_HEAD(nfsdirhashhead, nfsdircache); 79 TAILQ_HEAD(nfsdirchainhead, nfsdircache); 80 81 struct nfsdircache { 82 off_t dc_cookie; /* Own offset (key) */ 83 off_t dc_blkcookie; /* Offset of block we're in */ 84 LIST_ENTRY(nfsdircache) dc_hash; /* Hash chain */ 85 TAILQ_ENTRY(nfsdircache) dc_chain; /* Least recently entered chn */ 86 u_int32_t dc_cookie32; /* Key for 64<->32 xlate case */ 87 int dc_entry; /* Entry number within block */ 88 int dc_refcnt; /* Reference count */ 89 int dc_flags; /* NFSDC_ flags */ 90 }; 91 92 #define NFSDC_INVALID 1 93 94 /* 95 * NFSDC_BLKNO: get buffer cache index 96 */ 97 #define NFSDC_BLKNO(ndp) ((daddr_t)(ndp)->dc_blkcookie) 98 99 /* 100 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 101 * is purely coincidental. 102 * There is a unique nfsnode allocated for each active file, 103 * each current directory, each mounted-on file, text file, and the root. 104 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 105 */ 106 107 struct nfsnode_spec { 108 struct timespec nspec_mtim; /* local mtime */ 109 struct timespec nspec_atim; /* local atime */ 110 }; 111 112 struct nfsnode_reg { 113 off_t nreg_pushedlo; /* 1st blk in commited range */ 114 off_t nreg_pushedhi; /* Last block in range */ 115 off_t nreg_pushlo; /* 1st block in commit range */ 116 off_t nreg_pushhi; /* Last block in range */ 117 kmutex_t nreg_commitlock; /* Serialize commits XXX */ 118 int nreg_commitflags; 119 int nreg_error; /* Save write error value */ 120 }; 121 122 struct nfsnode_dir { 123 off_t ndir_direof; /* EOF offset cache */ 124 nfsuint64 ndir_cookieverf; /* Cookie verifier */ 125 struct nfsdirhashhead *ndir_dircache; /* offset -> cache hash heads */ 126 struct nfsdirchainhead ndir_dirchain; /* Chain of dir cookies */ 127 struct timespec ndir_nctime; /* Last name cache entry */ 128 unsigned ndir_dircachesize; /* Size of dir cookie cache */ 129 }; 130 131 struct nfsnode { 132 struct genfs_node n_gnode; 133 u_quad_t n_size; /* Current size of file */ 134 135 union { 136 struct nfsnode_spec nu_spec; 137 struct nfsnode_reg nu_reg; 138 struct nfsnode_dir nu_dir; 139 } n_un1; 140 141 #define n_mtim n_un1.nu_spec.nspec_mtim 142 #define n_atim n_un1.nu_spec.nspec_atim 143 144 #define n_pushedlo n_un1.nu_reg.nreg_pushedlo 145 #define n_pushedhi n_un1.nu_reg.nreg_pushedhi 146 #define n_pushlo n_un1.nu_reg.nreg_pushlo 147 #define n_pushhi n_un1.nu_reg.nreg_pushhi 148 #define n_commitlock n_un1.nu_reg.nreg_commitlock 149 #define n_commitflags n_un1.nu_reg.nreg_commitflags 150 #define n_error n_un1.nu_reg.nreg_error 151 152 #define n_direofoffset n_un1.nu_dir.ndir_direof 153 #define n_cookieverf n_un1.nu_dir.ndir_cookieverf 154 #define n_dircache n_un1.nu_dir.ndir_dircache 155 #define n_dirchain n_un1.nu_dir.ndir_dirchain 156 #define n_nctime n_un1.nu_dir.ndir_nctime 157 #define n_dircachesize n_un1.nu_dir.ndir_dircachesize 158 159 union { 160 struct sillyrename *nf_silly; /* !VDIR: silly rename struct */ 161 unsigned *ndir_dirgens; /* 32<->64bit xlate gen. no. */ 162 } n_un2; 163 164 #define n_sillyrename n_un2.nf_silly 165 #define n_dirgens n_un2.ndir_dirgens 166 167 struct rb_node n_rbnode; /* red/black node */ 168 nfsfh_t *n_fhp; /* NFS File Handle */ 169 struct vattr *n_vattr; /* Vnode attribute cache */ 170 struct vnode *n_vnode; /* associated vnode */ 171 struct lockf *n_lockf; /* Locking record of file */ 172 time_t n_attrstamp; /* Attr. cache timestamp */ 173 struct timespec n_mtime; /* Prev modify time. */ 174 time_t n_ctime; /* Prev create time. */ 175 short n_fhsize; /* size in bytes, of fh */ 176 short n_flag; /* Flag for locking.. */ 177 nfsfh_t n_fh; /* Small File Handle */ 178 time_t n_accstamp; /* Access cache timestamp */ 179 uid_t n_accuid; /* Last access requester */ 180 int n_accmode; /* Mode last requested */ 181 int n_accerror; /* Error last returned */ 182 kauth_cred_t n_rcred; 183 kauth_cred_t n_wcred; 184 }; 185 186 /* 187 * Values for n_commitflags 188 */ 189 #define NFS_COMMIT_PUSH_VALID 0x0001 /* push range valid */ 190 #define NFS_COMMIT_PUSHED_VALID 0x0002 /* pushed range valid */ 191 192 /* 193 * Flags for n_flag 194 */ 195 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 196 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 197 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 198 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 199 #define NACC 0x0100 /* Special file accessed */ 200 #define NUPD 0x0200 /* Special file updated */ 201 #define NCHG 0x0400 /* Special file times changed */ 202 #define NTRUNCDELAYED 0x1000 /* Should be truncated later; 203 implies stale cache */ 204 #define NREMOVED 0x2000 /* Has been removed */ 205 #define NUSEOPENCRED 0x4000 /* Try open cred first rather than owner's */ 206 #define NEOFVALID 0x8000 /* dir: n_direofoffset is valid */ 207 208 #define NFS_EOFVALID(ndp) ((ndp)->n_flag & NEOFVALID) 209 210 /* 211 * Convert between nfsnode pointers and vnode pointers 212 */ 213 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 214 #define NFSTOV(np) ((np)->n_vnode) 215 216 #ifdef _KERNEL 217 218 /* 219 * Per-nfsiod datas 220 */ 221 struct nfs_iod { 222 kmutex_t nid_lock; 223 kcondvar_t nid_cv; 224 LIST_ENTRY(nfs_iod) nid_idle; 225 struct nfsmount *nid_mount; 226 bool nid_exiting; 227 228 LIST_ENTRY(nfs_iod) nid_all; 229 }; 230 231 LIST_HEAD(nfs_iodlist, nfs_iod); 232 extern kmutex_t nfs_iodlist_lock; 233 extern struct nfs_iodlist nfs_iodlist_idle; 234 extern struct nfs_iodlist nfs_iodlist_all; 235 extern u_long nfsdirhashmask; 236 237 /* 238 * Prototypes for NFS vnode operations 239 */ 240 int nfs_lookup __P((void *)); 241 int nfs_create __P((void *)); 242 int nfs_mknod __P((void *)); 243 int nfs_open __P((void *)); 244 int nfs_close __P((void *)); 245 int nfsspec_close __P((void *)); 246 int nfsfifo_close __P((void *)); 247 int nfs_access __P((void *)); 248 int nfsspec_access __P((void *)); 249 int nfs_getattr __P((void *)); 250 int nfs_setattr __P((void *)); 251 int nfs_read __P((void *)); 252 int nfs_write __P((void *)); 253 int nfsspec_read __P((void *)); 254 int nfsspec_write __P((void *)); 255 int nfsfifo_read __P((void *)); 256 int nfsfifo_write __P((void *)); 257 #define nfs_ioctl genfs_enoioctl 258 #define nfs_poll genfs_poll 259 #define nfs_revoke genfs_revoke 260 #define nfs_mmap genfs_mmap 261 int nfs_fsync __P((void *)); 262 #define nfs_seek genfs_seek 263 int nfs_remove __P((void *)); 264 int nfs_link __P((void *)); 265 int nfs_rename __P((void *)); 266 int nfs_mkdir __P((void *)); 267 int nfs_rmdir __P((void *)); 268 int nfs_symlink __P((void *)); 269 int nfs_readdir __P((void *)); 270 int nfs_readlink __P((void *)); 271 #define nfs_abortop genfs_abortop 272 int nfs_inactive __P((void *)); 273 int nfs_reclaim __P((void *)); 274 #define nfs_lock genfs_lock 275 int nfs_unlock __P((void *)); 276 #define nfs_islocked genfs_islocked 277 int nfs_bmap __P((void *)); 278 int nfs_strategy __P((void *)); 279 int nfs_print __P((void *)); 280 int nfs_pathconf __P((void *)); 281 int nfs_advlock __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 Fri Sep 26 20:09:58 GMT 2025