1 /* $NetBSD: nfsnode.h,v 1.77 2024/12/07 02:05:55 riastradh 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/types.h> 42 43 #include <sys/condvar.h> 44 #include <sys/mutex.h> 45 #include <sys/queue.h> 46 #include <sys/timespec.h> 47 48 #include <nfs/nfs.h> 49 #include <nfs/nfsproto.h> 50 51 #include <miscfs/genfs/genfs.h> 52 #include <miscfs/genfs/genfs_node.h> 53 54 /* 55 * Definitions for the directory cache. Because directory cookies 56 * are an opaque 64 bit entity, we need to provide some sort of 57 * mapping between cookies and logical blocknumbers. Also, 58 * we should store the cookies from the server somewhere, 59 * to be able to satisfy VOP_READDIR requests for cookies. 60 * We can't store the cookies in the dirent structure, as some 61 * other systems. 62 * 63 * Each offset is hashed into a per-nfsnode hashtable. An entry 64 * found therein contains information about the (faked up) 65 * logical blocknumber, and also a pointer to a buffer where 66 * the cookies are stored. 67 */ 68 69 LIST_HEAD(nfsdirhashhead, nfsdircache); 70 TAILQ_HEAD(nfsdirchainhead, nfsdircache); 71 72 struct nfsdircache { 73 off_t dc_cookie; /* Own offset (key) */ 74 off_t dc_blkcookie; /* Offset of block we're in */ 75 LIST_ENTRY(nfsdircache) dc_hash; /* Hash chain */ 76 TAILQ_ENTRY(nfsdircache) dc_chain; /* Least recently entered chn */ 77 u_int32_t dc_cookie32; /* Key for 64<->32 xlate case */ 78 int dc_entry; /* Entry number within block */ 79 int dc_refcnt; /* Reference count */ 80 int dc_flags; /* NFSDC_ flags */ 81 }; 82 83 #define NFSDC_INVALID 1 84 85 /* 86 * NFSDC_BLKNO: get buffer cache index 87 */ 88 #define NFSDC_BLKNO(ndp) ((daddr_t)(ndp)->dc_blkcookie) 89 90 /* 91 * The nfsnode is the nfs equivalent to ufs's inode. Any similarity 92 * is purely coincidental. 93 * There is a unique nfsnode allocated for each active file, 94 * each current directory, each mounted-on file, text file, and the root. 95 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 96 */ 97 98 struct nfsnode_spec { 99 struct timespec nspec_mtim; /* local mtime */ 100 struct timespec nspec_atim; /* local atime */ 101 }; 102 103 struct nfsnode_reg { 104 off_t nreg_pushedlo; /* 1st blk in committed range */ 105 off_t nreg_pushedhi; /* Last block in range */ 106 off_t nreg_pushlo; /* 1st block in commit range */ 107 off_t nreg_pushhi; /* Last block in range */ 108 kmutex_t nreg_commitlock; /* Serialize commits XXX */ 109 int nreg_commitflags; 110 int nreg_error; /* Save write error value */ 111 }; 112 113 struct nfsnode_dir { 114 off_t ndir_direof; /* EOF offset cache */ 115 nfsuint64 ndir_cookieverf; /* Cookie verifier */ 116 struct nfsdirhashhead *ndir_dircache; /* offset -> cache hash heads */ 117 struct nfsdirchainhead ndir_dirchain; /* Chain of dir cookies */ 118 struct timespec ndir_nctime; /* Last name cache entry */ 119 unsigned ndir_dircachesize; /* Size of dir cookie cache */ 120 }; 121 122 struct nfsnode { 123 struct genfs_node n_gnode; 124 u_quad_t n_size; /* Current size of file */ 125 126 union { 127 struct nfsnode_spec nu_spec; 128 struct nfsnode_reg nu_reg; 129 struct nfsnode_dir nu_dir; 130 } n_un1; 131 132 #define n_mtim n_un1.nu_spec.nspec_mtim 133 #define n_atim n_un1.nu_spec.nspec_atim 134 135 #define n_pushedlo n_un1.nu_reg.nreg_pushedlo 136 #define n_pushedhi n_un1.nu_reg.nreg_pushedhi 137 #define n_pushlo n_un1.nu_reg.nreg_pushlo 138 #define n_pushhi n_un1.nu_reg.nreg_pushhi 139 #define n_commitlock n_un1.nu_reg.nreg_commitlock 140 #define n_commitflags n_un1.nu_reg.nreg_commitflags 141 #define n_error n_un1.nu_reg.nreg_error 142 143 #define n_direofoffset n_un1.nu_dir.ndir_direof 144 #define n_cookieverf n_un1.nu_dir.ndir_cookieverf 145 #define n_dircache n_un1.nu_dir.ndir_dircache 146 #define n_dirchain n_un1.nu_dir.ndir_dirchain 147 #define n_nctime n_un1.nu_dir.ndir_nctime 148 #define n_dircachesize n_un1.nu_dir.ndir_dircachesize 149 150 union { 151 struct sillyrename *nf_silly; /* !VDIR: silly rename struct */ 152 unsigned *ndir_dirgens; /* 32<->64bit xlate gen. no. */ 153 } n_un2; 154 155 #define n_sillyrename n_un2.nf_silly 156 #define n_dirgens n_un2.ndir_dirgens 157 158 nfsfh_t *n_fhp; /* NFS File Handle */ 159 struct vattr *n_vattr; /* Vnode attribute cache */ 160 struct vnode *n_vnode; /* associated vnode */ 161 struct lockf *n_lockf; /* Locking record of file */ 162 time_t n_attrstamp; /* Attr. cache timestamp */ 163 struct timespec n_mtime; /* Prev modify time. */ 164 time_t n_ctime; /* Prev create time. */ 165 short n_fhsize; /* size in bytes, of fh */ 166 short n_flag; /* Flag for locking.. */ 167 nfsfh_t n_fh; /* Small File Handle */ 168 time_t n_accstamp; /* Access cache timestamp */ 169 uid_t n_accuid; /* Last access requester */ 170 int n_accmode; /* Mode last requested */ 171 int n_accerror; /* Error last returned */ 172 kauth_cred_t n_rcred; 173 kauth_cred_t n_wcred; 174 }; 175 176 /* 177 * Values for n_commitflags 178 */ 179 #define NFS_COMMIT_PUSH_VALID 0x0001 /* push range valid */ 180 #define NFS_COMMIT_PUSHED_VALID 0x0002 /* pushed range valid */ 181 182 /* 183 * Flags for n_flag 184 */ 185 #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ 186 #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ 187 #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */ 188 #define NWRITEERR 0x0008 /* Flag write errors so close will know */ 189 #define NACC 0x0100 /* Special file accessed */ 190 #define NUPD 0x0200 /* Special file updated */ 191 #define NCHG 0x0400 /* Special file times changed */ 192 #define NTRUNCDELAYED 0x1000 /* Should be truncated later; 193 implies stale cache */ 194 #define NREMOVED 0x2000 /* Has been removed */ 195 #define NUSEOPENCRED 0x4000 /* Try open cred first rather than owner's */ 196 #define NEOFVALID 0x8000 /* dir: n_direofoffset is valid */ 197 198 #define NFS_EOFVALID(ndp) ((ndp)->n_flag & NEOFVALID) 199 200 /* 201 * Convert between nfsnode pointers and vnode pointers 202 */ 203 #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) 204 #define NFSTOV(np) ((np)->n_vnode) 205 206 #ifdef _KERNEL 207 208 #include <sys/workqueue.h> 209 /* 210 * Silly rename structure that hangs off the nfsnode until the name 211 * can be removed by nfs_inactive() 212 */ 213 struct sillyrename { 214 struct work s_work; 215 kauth_cred_t s_cred; 216 struct vnode *s_dvp; 217 long s_namlen; 218 char s_name[20]; 219 }; 220 221 /* 222 * Per-nfsiod datas 223 */ 224 struct nfs_iod { 225 kmutex_t nid_lock; 226 kcondvar_t nid_cv; 227 LIST_ENTRY(nfs_iod) nid_idle; 228 struct nfsmount *nid_mount; 229 bool nid_exiting; 230 231 LIST_ENTRY(nfs_iod) nid_all; 232 }; 233 234 LIST_HEAD(nfs_iodlist, nfs_iod); 235 extern kmutex_t nfs_iodlist_lock; 236 extern struct nfs_iodlist nfs_iodlist_idle; 237 extern struct nfs_iodlist nfs_iodlist_all; 238 extern u_long nfsdirhashmask; 239 240 /* 241 * Prototypes for NFS vnode operations 242 */ 243 int nfs_lookup(void *); 244 int nfs_create(void *); 245 int nfs_mknod(void *); 246 int nfs_open(void *); 247 int nfs_close(void *); 248 int nfsspec_close(void *); 249 int nfsfifo_close(void *); 250 int nfs_access(void *); 251 int nfsspec_access(void *); 252 int nfs_getattr(void *); 253 int nfs_setattr(void *); 254 int nfs_read(void *); 255 int nfs_write(void *); 256 int nfsspec_read(void *); 257 int nfsspec_write(void *); 258 int nfsfifo_read(void *); 259 int nfsfifo_write(void *); 260 int nfs_fsync(void *); 261 int nfs_remove(void *); 262 int nfs_link(void *); 263 int nfs_rename(void *); 264 int nfs_mkdir(void *); 265 int nfs_rmdir(void *); 266 int nfs_symlink(void *); 267 int nfs_readdir(void *); 268 int nfs_readlink(void *); 269 int nfs_inactive(void *); 270 int nfs_reclaim(void *); 271 int nfs_unlock(void *); 272 int nfs_bmap(void *); 273 int nfs_strategy(void *); 274 int nfs_print(void *); 275 int nfs_pathconf(void *); 276 int nfs_advlock(void *); 277 int nfs_getpages(void *); 278 int nfs_kqfilter(void *); 279 280 extern int (**nfsv2_vnodeop_p)(void *); 281 282 #define NFS_INVALIDATE_ATTRCACHE(np) (np)->n_attrstamp = 0 283 284 #endif /* _KERNEL */ 285 286 #endif /* _NFS_NFSNODE_H_ */ 287
Indexes created Sat Sep 20 22:09:52 GMT 2025