nfsnode.h revision 1.67.10.2
1 /* $NetBSD: nfsnode.h,v 1.67.10.2 2009/05/04 08:14:22 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 #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 * Definitions for the directory cache. Because directory cookies 53 * are an opaque 64 bit entity, we need to provide some sort of 54 * mapping between cookies and logical blocknumbers. Also, 55 * we should store the cookies from the server somewhere, 56 * to be able to satisfy VOP_READDIR requests for cookies. 57 * We can't store the cookies in the dirent structure, as some 58 * other systems. 59 * 60 * Each offset is hashed into a per-nfsnode hashtable. An entry 61 * found therein contains information about the (faked up) 62 * logical blocknumber, and also a pointer to a buffer where 63 * the cookies are stored. 64 */ 65 66 67 LIST_HEAD(nfsdirhashhead, nfsdircache); 68 TAILQ_HEAD(nfsdirchainhead, nfsdircache); 69 70 struct nfsdircache { 71 off_t dc_cookie; /* Own offset (key) */ 72 off_t dc_blkcookie; /* Offset of block we're in */ 73 LIST_ENTRY(nfsdircache) dc_hash; /* Hash chain */ 74 TAILQ_ENTRY(nfsdircache) dc_chain; /* Least recently entered chn */ 75 u_int32_t dc_cookie32; /* Key for 64<->32 xlate case */ 76 int dc_entry; /* Entry number within block */ 77 int dc_refcnt; /* Reference count */ 78 int dc_flags; /* NFSDC_ flags */ 79 }; 80 81 #define NFSDC_INVALID 1 82 83 /* 84 * NFSDC_BLKNO: get buffer cache index 85 */ 86 #define NFSDC_BLKNO(ndp) ((daddr_t)(ndp)->dc_blkcookie) 87 88 /* 89 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 90 * is purely coincidental. 91 * There is a unique nfsnode allocated for each active file, 92 * each current directory, each mounted-on file, text file, and the root. 93 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 94 */ 95 96 struct nfsnode_spec { 97 struct timespec nspec_mtim; /* local mtime */ 98 struct timespec nspec_atim; /* local atime */ 99 }; 100 101 struct nfsnode_reg { 102 off_t nreg_pushedlo; /* 1st blk in commited range */ 103 off_t nreg_pushedhi; /* Last block in range */ 104 off_t nreg_pushlo; /* 1st block in commit range */ 105 off_t nreg_pushhi; /* Last block in range */ 106 kmutex_t nreg_commitlock; /* Serialize commits XXX */ 107 int nreg_commitflags; 108 int nreg_error; /* Save write error value */ 109 }; 110 111 struct nfsnode_dir { 112 off_t ndir_direof; /* EOF offset cache */ 113 nfsuint64 ndir_cookieverf; /* Cookie verifier */ 114 struct nfsdirhashhead *ndir_dircache; /* offset -> cache hash heads */ 115 struct nfsdirchainhead ndir_dirchain; /* Chain of dir cookies */ 116 struct timespec ndir_nctime; /* Last name cache entry */ 117 unsigned ndir_dircachesize; /* Size of dir cookie cache */ 118 }; 119 120 struct nfsnode { 121 struct genfs_node n_gnode; 122 u_quad_t n_size; /* Current size of file */ 123 124 union { 125 struct nfsnode_spec nu_spec; 126 struct nfsnode_reg nu_reg; 127 struct nfsnode_dir nu_dir; 128 } n_un1; 129 130 #define n_mtim n_un1.nu_spec.nspec_mtim 131 #define n_atim n_un1.nu_spec.nspec_atim 132 133 #define n_pushedlo n_un1.nu_reg.nreg_pushedlo 134 #define n_pushedhi n_un1.nu_reg.nreg_pushedhi 135 #define n_pushlo n_un1.nu_reg.nreg_pushlo 136 #define n_pushhi n_un1.nu_reg.nreg_pushhi 137 #define n_commitlock n_un1.nu_reg.nreg_commitlock 138 #define n_commitflags n_un1.nu_reg.nreg_commitflags 139 #define n_error n_un1.nu_reg.nreg_error 140 141 #define n_direofoffset n_un1.nu_dir.ndir_direof 142 #define n_cookieverf n_un1.nu_dir.ndir_cookieverf 143 #define n_dircache n_un1.nu_dir.ndir_dircache 144 #define n_dirchain n_un1.nu_dir.ndir_dirchain 145 #define n_nctime n_un1.nu_dir.ndir_nctime 146 #define n_dircachesize n_un1.nu_dir.ndir_dircachesize 147 148 union { 149 struct sillyrename *nf_silly; /* !VDIR: silly rename struct */ 150 unsigned *ndir_dirgens; /* 32<->64bit xlate gen. no. */ 151 } n_un2; 152 153 #define n_sillyrename n_un2.nf_silly 154 #define n_dirgens n_un2.ndir_dirgens 155 156 struct rb_node n_rbnode; /* red/black node */ 157 nfsfh_t *n_fhp; /* NFS File Handle */ 158 struct vnode *n_vnode; /* associated vnode */ 159 struct lockf *n_lockf; /* Locking record of file */ 160 struct timespec n_mtime; /* Prev modify time. */ 161 time_t n_ctime; /* Prev create time. */ 162 short n_fhsize; /* size in bytes, of fh */ 163 short n_flag; /* Flag for locking.. */ 164 nfsfh_t n_fh; /* Small File Handle */ 165 kauth_cred_t n_rcred; 166 kauth_cred_t n_wcred; 167 168 kmutex_t n_attrlock; 169 time_t n_attrstamp; /* Attr. cache timestamp */ 170 struct vattr *n_vattr; /* Vnode attribute cache */ 171 time_t n_accstamp; /* Access cache timestamp */ 172 uid_t n_accuid; /* Last access requester */ 173 int n_accmode; /* Mode last requested */ 174 int n_accerror; /* Error last returned */ 175 }; 176 177 /* 178 * Values for n_commitflags 179 */ 180 #define NFS_COMMIT_PUSH_VALID 0x0001 /* push range valid */ 181 #define NFS_COMMIT_PUSHED_VALID 0x0002 /* pushed range valid */ 182 183 /* 184 * Flags for n_flag 185 */ 186 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 187 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 188 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 189 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 190 #define NACC 0x0100 /* Special file accessed */ 191 #define NUPD 0x0200 /* Special file updated */ 192 #define NCHG 0x0400 /* Special file times changed */ 193 #define NTRUNCDELAYED 0x1000 /* Should be truncated later; 194 implies stale cache */ 195 #define NREMOVED 0x2000 /* Has been removed */ 196 #define NUSEOPENCRED 0x4000 /* Try open cred first rather than owner's */ 197 #define NEOFVALID 0x8000 /* dir: n_direofoffset is valid */ 198 199 #define NFS_EOFVALID(ndp) ((ndp)->n_flag & NEOFVALID) 200 201 /* 202 * Convert between nfsnode pointers and vnode pointers 203 */ 204 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 205 #define NFSTOV(np) ((np)->n_vnode) 206 207 #ifdef _KERNEL 208 209 #include <sys/workqueue.h> 210 /* 211 * Silly rename structure that hangs off the nfsnode until the name 212 * can be removed by nfs_inactive() 213 */ 214 struct sillyrename { 215 struct work s_work; 216 kauth_cred_t s_cred; 217 struct vnode *s_dvp; 218 long s_namlen; 219 char s_name[20]; 220 }; 221 222 /* 223 * Per-nfsiod datas 224 */ 225 struct nfs_iod { 226 kmutex_t nid_lock; 227 kcondvar_t nid_cv; 228 LIST_ENTRY(nfs_iod) nid_idle; 229 struct nfsmount *nid_mount; 230 bool nid_exiting; 231 232 LIST_ENTRY(nfs_iod) nid_all; 233 }; 234 235 LIST_HEAD(nfs_iodlist, nfs_iod); 236 extern kmutex_t nfs_iodlist_lock; 237 extern struct nfs_iodlist nfs_iodlist_idle; 238 extern struct nfs_iodlist nfs_iodlist_all; 239 extern u_long nfsdirhashmask; 240 241 /* 242 * Prototypes for NFS vnode operations 243 */ 244 int nfs_lookup(void *); 245 int nfs_create(void *); 246 int nfs_mknod(void *); 247 int nfs_open(void *); 248 int nfs_close(void *); 249 int nfsspec_close(void *); 250 int nfsfifo_close(void *); 251 int nfs_access(void *); 252 int nfsspec_access(void *); 253 int nfs_getattr(void *); 254 int nfs_setattr(void *); 255 int nfs_read(void *); 256 int nfs_write(void *); 257 int nfsspec_read(void *); 258 int nfsspec_write(void *); 259 int nfsfifo_read(void *); 260 int nfsfifo_write(void *); 261 #define nfs_ioctl genfs_enoioctl 262 #define nfs_poll genfs_poll 263 #define nfs_revoke genfs_revoke 264 #define nfs_mmap genfs_mmap 265 int nfs_fsync(void *); 266 #define nfs_seek genfs_seek 267 int nfs_remove(void *); 268 int nfs_link(void *); 269 int nfs_rename(void *); 270 int nfs_mkdir(void *); 271 int nfs_rmdir(void *); 272 int nfs_symlink(void *); 273 int nfs_readdir(void *); 274 int nfs_readlink(void *); 275 #define nfs_abortop genfs_abortop 276 int nfs_inactive(void *); 277 int nfs_reclaim(void *); 278 #define nfs_lock genfs_lock 279 int nfs_unlock(void *); 280 #define nfs_islocked genfs_islocked 281 int nfs_bmap(void *); 282 int nfs_strategy(void *); 283 int nfs_print(void *); 284 int nfs_pathconf(void *); 285 int nfs_advlock(void *); 286 int nfs_getpages(void *); 287 int nfs_putpages(void *); 288 int nfs_kqfilter(void *); 289 290 extern int (**nfsv2_vnodeop_p)(void *); 291 292 #define NFS_INVALIDATE_ATTRCACHE(np) (np)->n_attrstamp = 0 293 294 #endif /* _KERNEL */ 295 296 #endif 297
Indexes created Thu Oct 02 10:09:58 GMT 2025