1/* 2 * Copyright (c) 2000-2011 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29/* 30 * Copyright (c) 1989, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * This code is derived from software contributed to Berkeley by 34 * Rick Macklem at The University of Guelph. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)nfsnode.h 8.9 (Berkeley) 5/14/95 65 * FreeBSD-Id: nfsnode.h,v 1.24 1997/10/28 14:06:25 bde Exp $ 66 */ 67 68 69#ifndef _NFS_NFSNODE_H_ 70#define _NFS_NFSNODE_H_ 71 72#include <sys/appleapiopts.h> 73 74#ifdef __APPLE_API_PRIVATE 75#ifndef _NFS_NFS_H_ 76#include <nfs/nfs.h> 77#endif 78#include <sys/kauth.h> 79 80/* 81 * Silly rename structure that hangs off the nfsnode until the name 82 * can be removed by nfs_vnop_inactive() 83 */ 84struct nfs_sillyrename { 85 kauth_cred_t nsr_cred; 86 struct nfsnode *nsr_dnp; 87 int nsr_namlen; 88 char nsr_name[20]; 89}; 90 91/* 92 * The nfsbuf is the nfs equivalent to a struct buf. 93 */ 94struct nfsbuf { 95 LIST_ENTRY(nfsbuf) nb_hash; /* hash chain */ 96 LIST_ENTRY(nfsbuf) nb_vnbufs; /* nfsnode's nfsbuf chain */ 97 TAILQ_ENTRY(nfsbuf) nb_free; /* free list position if not active. */ 98 volatile uint32_t nb_flags; /* NB_* flags. */ 99 volatile uint32_t nb_lflags; /* NBL_* flags. */ 100 volatile uint32_t nb_refs; /* outstanding references. */ 101 uint32_t nb_bufsize; /* buffer size */ 102 daddr64_t nb_lblkno; /* logical block number. */ 103 uint64_t nb_verf; /* V3 write verifier */ 104 int nb_commitlevel; /* lowest write commit level */ 105 time_t nb_timestamp; /* buffer timestamp */ 106 int nb_error; /* errno value. */ 107 u_int32_t nb_valid; /* valid pages in buf */ 108 u_int32_t nb_dirty; /* dirty pages in buf */ 109 int nb_validoff; /* offset in buffer of valid region. */ 110 int nb_validend; /* offset of end of valid region. */ 111 int nb_dirtyoff; /* offset in buffer of dirty region. */ 112 int nb_dirtyend; /* offset of end of dirty region. */ 113 int nb_offio; /* offset in buffer of I/O region. */ 114 int nb_endio; /* offset of end of I/O region. */ 115 int nb_rpcs; /* Count of RPCs remaining for this buffer. */ 116 caddr_t nb_data; /* mapped buffer */ 117 nfsnode_t nb_np; /* nfsnode buffer belongs to */ 118 kauth_cred_t nb_rcred; /* read credentials reference */ 119 kauth_cred_t nb_wcred; /* write credentials reference */ 120 void * nb_pagelist; /* upl */ 121}; 122 123#define NFS_MAXBSIZE (32 * PAGE_SIZE) /* valid/dirty page masks limit buffer size */ 124 125#define NFS_A_LOT_OF_NEEDCOMMITS 256 /* max# uncommitted buffers for a node */ 126#define NFS_A_LOT_OF_DELAYED_WRITES MAX(nfsbufcnt/8,512) /* max# "delwri" buffers in system */ 127 128/* 129 * These flags are kept in b_lflags... 130 * nfs_buf_mutex must be held before examining/updating 131 */ 132#define NBL_BUSY 0x00000001 /* I/O in progress. */ 133#define NBL_WANTED 0x00000002 /* Process wants this buffer. */ 134 135/* 136 * These flags are kept in nb_flags and they're (purposefully) 137 * very similar to the B_* flags for struct buf. 138 * nfs_buf_mutex is not needed to examine/update these. 139 */ 140#define NB_STALEWVERF 0x00000001 /* write verifier changed on us */ 141#define NB_NEEDCOMMIT 0x00000002 /* buffer needs to be committed */ 142#define NB_ASYNC 0x00000004 /* Start I/O, do not wait. */ 143#define NB_CACHE 0x00000020 /* buffer data found in the cache */ 144#define NB_STABLE 0x00000040 /* write FILESYNC not UNSTABLE */ 145#define NB_DELWRI 0x00000080 /* delayed write: dirty range needs to be written */ 146#define NB_DONE 0x00000200 /* I/O completed. */ 147#define NB_EINTR 0x00000400 /* I/O was interrupted */ 148#define NB_ERROR 0x00000800 /* I/O error occurred. */ 149#define NB_INVAL 0x00002000 /* Does not contain valid info. */ 150#define NB_NCRDAHEAD 0x00004000 /* "nocache readahead" data */ 151#define NB_NOCACHE 0x00008000 /* Do not cache block after use. */ 152#define NB_WRITE 0x00000000 /* Write buffer (pseudo flag). */ 153#define NB_READ 0x00100000 /* Read buffer. */ 154#define NB_MULTASYNCRPC 0x00200000 /* multiple async RPCs issued for buffer */ 155#define NB_PAGELIST 0x00400000 /* Buffer describes pagelist I/O. */ 156#define NB_WRITEINPROG 0x01000000 /* Write in progress. */ 157#define NB_META 0x40000000 /* buffer contains meta-data. */ 158 159/* Flags for operation type in nfs_buf_get() */ 160#define NBLK_READ 0x00000001 /* buffer for read */ 161#define NBLK_WRITE 0x00000002 /* buffer for write */ 162#define NBLK_META 0x00000004 /* buffer for metadata */ 163#define NBLK_OPMASK 0x00000007 /* operation mask */ 164/* modifiers for above flags... */ 165#define NBLK_NOWAIT 0x40000000 /* don't wait on busy buffer */ 166#define NBLK_ONLYVALID 0x80000000 /* only return cached buffer */ 167 168/* These flags are used for nfsbuf iterating */ 169#define NBI_ITER 0x01 /* iteration in progress */ 170#define NBI_ITERWANT 0x02 /* waiting to iterate */ 171#define NBI_CLEAN 0x04 /* requesting clean buffers */ 172#define NBI_DIRTY 0x08 /* requesting dirty buffers */ 173#define NBI_NOWAIT 0x10 /* don't block on NBI_ITER */ 174 175/* Flags for nfs_buf_acquire */ 176#define NBAC_NOWAIT 0x01 /* Don't wait if buffer is busy */ 177#define NBAC_REMOVE 0x02 /* Remove from free list once buffer is acquired */ 178 179/* some convenience macros... */ 180#define NBOFF(BP) ((off_t)(BP)->nb_lblkno * (off_t)(BP)->nb_bufsize) 181#define NBPGVALID(BP,P) (((BP)->nb_valid >> (P)) & 0x1) 182#define NBPGDIRTY(BP,P) (((BP)->nb_dirty >> (P)) & 0x1) 183#define NBPGVALID_SET(BP,P) ((BP)->nb_valid |= (1 << (P))) 184#define NBPGDIRTY_SET(BP,P) ((BP)->nb_dirty |= (1 << (P))) 185 186#define NBUFSTAMPVALID(BP) ((BP)->nb_timestamp != ~0) 187#define NBUFSTAMPINVALIDATE(BP) ((BP)->nb_timestamp = ~0) 188 189#define NFS_BUF_MAP(BP) \ 190 do { \ 191 if (!(BP)->nb_data && nfs_buf_map(BP)) \ 192 panic("nfs_buf_map failed"); \ 193 } while (0) 194 195LIST_HEAD(nfsbuflists, nfsbuf); 196TAILQ_HEAD(nfsbuffreehead, nfsbuf); 197 198#define NFSNOLIST ((void*)0xdeadbeef) 199 200extern lck_mtx_t *nfs_buf_mutex; 201extern int nfsbufcnt, nfsbufmin, nfsbufmax, nfsbufmetacnt, nfsbufmetamax; 202extern int nfsbuffreecnt, nfsbuffreemetacnt, nfsbufdelwricnt, nfsneedbuffer; 203extern int nfs_nbdwrite; 204extern struct nfsbuffreehead nfsbuffree, nfsbufdelwri; 205 206#ifdef NFSBUFDEBUG 207#define NFSBUFCNTCHK() \ 208 do { \ 209 if ( (nfsbufcnt < 0) || \ 210 (nfsbufcnt > nfsbufmax) || \ 211 (nfsbufmetacnt < 0) || \ 212 (nfsbufmetacnt > nfsbufmetamax) || \ 213 (nfsbufmetacnt > nfsbufcnt) || \ 214 (nfsbuffreecnt < 0) || \ 215 (nfsbuffreecnt > nfsbufmax) || \ 216 (nfsbuffreecnt > nfsbufcnt) || \ 217 (nfsbuffreemetacnt < 0) || \ 218 (nfsbuffreemetacnt > nfsbufmax) || \ 219 (nfsbuffreemetacnt > nfsbufcnt) || \ 220 (nfsbuffreemetacnt > nfsbufmetamax) || \ 221 (nfsbuffreemetacnt > nfsbufmetacnt) || \ 222 (nfsbufdelwricnt < 0) || \ 223 (nfsbufdelwricnt > nfsbufmax) || \ 224 (nfsbufdelwricnt > nfsbufcnt) || \ 225 (nfs_nbdwrite < 0) || \ 226 (nfs_nbdwrite > nfsbufcnt) || \ 227 0) \ 228 panic("nfsbuf count error: max %d meta %d cnt %d meta %d free %d meta %d delwr %d bdw %d\n", \ 229 nfsbufmax, nfsbufmetamax, nfsbufcnt, nfsbufmetacnt, nfsbuffreecnt, nfsbuffreemetacnt, \ 230 nfsbufdelwricnt, nfs_nbdwrite); \ 231 } while (0) 232#else 233#define NFSBUFCNTCHK() 234#endif 235 236/* 237 * NFS directory buffer 238 * 239 * Each buffer for a directory consists of: 240 * 241 * - a small header 242 * - a packed list of direntry structures 243 * (if RDIRPLUS is enabled, a file handle and attrstamp are 244 * packed after the direntry name.) 245 * - free/unused space 246 * - if RDIRPLUS is enabled, an array of attributes 247 * that is indexed backwards from the end of the buffer. 248 */ 249struct nfs_dir_buf_header { 250 uint16_t ndbh_flags; /* flags (see below) */ 251 uint16_t ndbh_count; /* # of entries */ 252 uint32_t ndbh_entry_end; /* end offset of direntry data */ 253 uint32_t ndbh_ncgen; /* name cache generation# */ 254 uint32_t ndbh_pad; /* reserved */ 255}; 256/* ndbh_flags */ 257#define NDB_FULL 0x0001 /* buffer has been filled */ 258#define NDB_EOF 0x0002 /* buffer contains EOF */ 259#define NDB_PLUS 0x0004 /* buffer contains RDIRPLUS data */ 260 261#define NFS_DIR_BUF_FIRST_DIRENTRY(BP) \ 262 ((struct direntry*)((char*)((BP)->nb_data) + sizeof(*ndbhp))) 263#define NFS_DIR_BUF_NVATTR(BP, IDX) \ 264 (&((struct nfs_vattr*)((char*)((BP)->nb_data) + (BP)->nb_bufsize))[-((IDX)+1)]) 265#define NFS_DIRENTRY_LEN(namlen) \ 266 ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 7) & ~7) 267#define NFS_DIRENT_LEN(namlen) \ 268 ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen) + 1 + 3) &~ 3)) 269#define NFS_DIRENTRY_NEXT(DP) \ 270 ((struct direntry*)((char*)(DP) + (DP)->d_reclen)) 271#define NFS_DIR_COOKIE_POTENTIALLY_TRUNCATED(C) \ 272 ((C) && ((((C) >> 32) == 0) || (((C) & 0x80000000ULL) && (((C) >> 32) == 0xffffffff)))) 273#define NFS_DIR_COOKIE_SAME32(C1, C2) \ 274 (((C1) & 0xffffffffULL) == ((C2) & 0xffffffffULL)) 275 276/* 277 * NFS directory cookie cache 278 * 279 * This structure is used to cache cookie-to-buffer mappings for 280 * cookies recently returned from READDIR. The entries are kept in an 281 * array. The most-recently-used (MRU) list is headed by the entry at 282 * index "mru". The index of the next entry in the list is kept in the 283 * "next" array. (An index value of -1 marks an invalid entry.) 284 */ 285#define NFSNUMCOOKIES 14 286struct nfsdmap { 287 int8_t free; /* next unused slot */ 288 int8_t mru; /* head of MRU list */ 289 int8_t next[NFSNUMCOOKIES]; /* MRU list links */ 290 struct { 291 uint64_t key; /* cookie */ 292 uint64_t lbn; /* lbn of buffer */ 293 } cookies[NFSNUMCOOKIES]; /* MRU list entries */ 294}; 295 296/* 297 * NFS vnode attribute structure 298 */ 299#define NFSTIME_ACCESS 0 /* time of last access */ 300#define NFSTIME_MODIFY 1 /* time of last modification */ 301#define NFSTIME_CHANGE 2 /* time file changed */ 302#define NFSTIME_CREATE 3 /* time file created */ 303#define NFSTIME_BACKUP 4 /* time of last backup */ 304#define NFSTIME_COUNT 5 305 306#define NFS_COMPARE_MTIME(TVP, NVAP, CMP) \ 307 (((TVP)->tv_sec == (NVAP)->nva_timesec[NFSTIME_MODIFY]) ? \ 308 ((TVP)->tv_nsec CMP (NVAP)->nva_timensec[NFSTIME_MODIFY]) : \ 309 ((TVP)->tv_sec CMP (NVAP)->nva_timesec[NFSTIME_MODIFY])) 310#define NFS_COPY_TIME(TVP, NVAP, WHICH) \ 311 do { \ 312 (TVP)->tv_sec = (NVAP)->nva_timesec[NFSTIME_##WHICH]; \ 313 (TVP)->tv_nsec = (NVAP)->nva_timensec[NFSTIME_##WHICH]; \ 314 } while (0) 315 316struct nfs_vattr { 317 enum vtype nva_type; /* vnode type (for create) */ 318 uint32_t nva_mode; /* file's access mode (and type) */ 319 uid_t nva_uid; /* owner user id */ 320 gid_t nva_gid; /* owner group id */ 321 guid_t nva_uuuid; /* owner user UUID */ 322 guid_t nva_guuid; /* owner group UUID */ 323 kauth_acl_t nva_acl; /* access control list */ 324 nfs_specdata nva_rawdev; /* device the special file represents */ 325 uint32_t nva_flags; /* file flags (see below) */ 326 uint32_t nva_maxlink; /* maximum # of links (v4) */ 327 uint64_t nva_nlink; /* number of references to file */ 328 uint64_t nva_fileid; /* file id */ 329 nfs_fsid nva_fsid; /* file system id */ 330 uint64_t nva_size; /* file size in bytes */ 331 uint64_t nva_bytes; /* bytes of disk space held by file */ 332 uint64_t nva_change; /* change attribute */ 333 int64_t nva_timesec[NFSTIME_COUNT]; 334 int32_t nva_timensec[NFSTIME_COUNT]; 335 uint32_t nva_bitmap[NFS_ATTR_BITMAP_LEN]; /* attributes that are valid */ 336}; 337 338/* nva_flags */ 339#define NFS_FFLAG_ARCHIVED 0x0001 340#define NFS_FFLAG_HIDDEN 0x0002 341#define NFS_FFLAG_HAS_NAMED_ATTRS 0x0004 /* file has named attributes */ 342#define NFS_FFLAG_TRIGGER 0x0008 /* node is a trigger/mirror mount point */ 343#define NFS_FFLAG_TRIGGER_REFERRAL 0x0010 /* trigger is a referral */ 344#define NFS_FFLAG_IS_ATTR 0x8000 /* file is a named attribute file/directory */ 345 346/* flags for nfs_getattr() */ 347#define NGA_CACHED 0x0001 /* use cached attributes (if still valid) */ 348#define NGA_UNCACHED 0x0002 /* fetch new attributes */ 349#define NGA_ACL 0x0004 /* fetch ACL */ 350#define NGA_MONITOR 0x0008 /* vnode monitor attr update poll */ 351 352/* macros for initting/cleaning up nfs_vattr structures */ 353#define NVATTR_INIT(NVAP) \ 354 do { \ 355 NFS_CLEAR_ATTRIBUTES((NVAP)->nva_bitmap); \ 356 (NVAP)->nva_flags = 0; \ 357 (NVAP)->nva_acl = NULL; \ 358 } while (0) 359#define NVATTR_CLEANUP(NVAP) \ 360 do { \ 361 NFS_CLEAR_ATTRIBUTES((NVAP)->nva_bitmap); \ 362 if ((NVAP)->nva_acl) { \ 363 kauth_acl_free((NVAP)->nva_acl); \ 364 (NVAP)->nva_acl = NULL; \ 365 } \ 366 } while (0) 367 368/* 369 * macros for detecting node changes 370 * 371 * These macros help us determine if a file has been changed on the server and 372 * thus whether or not we need to invalidate any cached data. 373 * 374 * For NFSv2/v3, the modification time is used. 375 * For NFSv4, the change attribute is used. 376 */ 377#define NFS_CHANGED(VERS, NP, NVAP) \ 378 (((VERS) >= NFS_VER4) ? \ 379 ((NP)->n_change != (NVAP)->nva_change) : \ 380 NFS_COMPARE_MTIME(&(NP)->n_mtime, (NVAP), !=)) 381#define NFS_CHANGED_NC(VERS, NP, NVAP) \ 382 (((VERS) >= NFS_VER4) ? \ 383 ((NP)->n_ncchange != (NVAP)->nva_change) : \ 384 NFS_COMPARE_MTIME(&(NP)->n_ncmtime, (NVAP), !=)) 385#define NFS_CHANGED_UPDATE(VERS, NP, NVAP) \ 386 do { \ 387 if ((VERS) >= NFS_VER4) \ 388 (NP)->n_change = (NVAP)->nva_change; \ 389 else \ 390 NFS_COPY_TIME(&(NP)->n_mtime, (NVAP), MODIFY); \ 391 } while (0) 392#define NFS_CHANGED_UPDATE_NC(VERS, NP, NVAP) \ 393 do { \ 394 if ((VERS) >= NFS_VER4) \ 395 (NP)->n_ncchange = (NVAP)->nva_change; \ 396 else \ 397 NFS_COPY_TIME(&(NP)->n_ncmtime, (NVAP), MODIFY); \ 398 } while (0) 399 400 401extern lck_grp_t *nfs_open_grp; 402extern uint32_t nfs_open_owner_seqnum, nfs_lock_owner_seqnum; 403 404/* 405 * NFSv4 open owner structure - one per cred per mount 406 */ 407struct nfs_open_owner { 408 TAILQ_ENTRY(nfs_open_owner) noo_link; /* List of open owners (on mount) */ 409 lck_mtx_t noo_lock; /* owner mutex */ 410 struct nfsmount * noo_mount; /* NFS mount */ 411 uint32_t noo_refcnt; /* # outstanding references */ 412 uint32_t noo_flags; /* see below */ 413 kauth_cred_t noo_cred; /* credentials of open owner */ 414 uint32_t noo_name; /* unique name used otw */ 415 uint32_t noo_seqid; /* client-side sequence ID */ 416 TAILQ_HEAD(,nfs_open_file) noo_opens; /* list of open files */ 417}; 418/* noo_flags */ 419#define NFS_OPEN_OWNER_LINK 0x1 /* linked into mount's open owner list */ 420#define NFS_OPEN_OWNER_BUSY 0x2 /* open state-modifying operation in progress */ 421#define NFS_OPEN_OWNER_WANT 0x4 /* someone else wants to mark busy */ 422 423/* 424 * NFS open file structure - one per open owner per nfsnode 425 */ 426struct nfs_open_file { 427 lck_mtx_t nof_lock; /* open file mutex */ 428 TAILQ_ENTRY(nfs_open_file) nof_link; /* list of open files */ 429 TAILQ_ENTRY(nfs_open_file) nof_oolink; /* list of open owner's open files */ 430 struct nfs_open_owner * nof_owner; /* open owner */ 431 nfsnode_t nof_np; /* nfsnode this open is for */ 432 nfs_stateid nof_stateid; /* open stateid */ 433 thread_t nof_creator; /* thread that created file */ 434 uint32_t nof_opencnt; /* open file count */ 435 uint16_t nof_flags; /* see below */ 436 uint8_t nof_access:4; /* access mode for this open */ 437 uint8_t nof_deny:4; /* deny mode for this open */ 438 uint8_t nof_mmap_access:4; /* mmap open access mode */ 439 uint8_t nof_mmap_deny:4; /* mmap open deny mode */ 440 /* counts of access/deny mode open combinations */ 441 uint32_t nof_r; /* read opens (deny none) */ 442 uint32_t nof_w; /* write opens (deny none) */ 443 uint32_t nof_rw; /* read/write opens (deny none) */ 444 uint32_t nof_r_dw; /* read deny-write opens */ 445 /* the rest of the counts have a max of 2 (1 for open + 1 for mmap) */ 446 uint32_t nof_w_dw:2; /* write deny-write opens (max 2) */ 447 uint32_t nof_rw_dw:2; /* read/write deny-write opens (max 2) */ 448 uint32_t nof_r_drw:2; /* read deny-read/write opens (max 2) */ 449 uint32_t nof_w_drw:2; /* write deny-read/write opens (max 2) */ 450 uint32_t nof_rw_drw:2; /* read/write deny-read/write opens (max 2) */ 451 /* counts of DELEGATED access/deny mode open combinations */ 452 uint32_t nof_d_w_dw:2; /* write deny-write opens (max 2) */ 453 uint32_t nof_d_rw_dw:2; /* read/write deny-write opens (max 2) */ 454 uint32_t nof_d_r_drw:2; /* read deny-read/write opens (max 2) */ 455 uint32_t nof_d_w_drw:2; /* write deny-read/write opens (max 2) */ 456 uint32_t nof_d_rw_drw:2; /* read/write deny-read/write opens (max 2) */ 457 uint32_t nof_d_r; /* read opens (deny none) */ 458 uint32_t nof_d_w; /* write opens (deny none) */ 459 uint32_t nof_d_rw; /* read/write opens (deny none) */ 460 uint32_t nof_d_r_dw; /* read deny-write opens */ 461}; 462/* nof_flags */ 463#define NFS_OPEN_FILE_BUSY 0x0001 /* open state-modifying operation in progress */ 464#define NFS_OPEN_FILE_WANT 0x0002 /* someone else wants to mark busy */ 465#define NFS_OPEN_FILE_CREATE 0x0004 /* has an open(RW) from a "CREATE" call */ 466#define NFS_OPEN_FILE_NEEDCLOSE 0x0008 /* has an open(R) from an (unopen) VNOP_READ or VNOP_MMAP call */ 467#define NFS_OPEN_FILE_SETATTR 0x0020 /* has an open(W) to perform a SETATTR(size) */ 468#define NFS_OPEN_FILE_POSIXLOCK 0x0040 /* server supports POSIX locking semantics */ 469#define NFS_OPEN_FILE_LOST 0x0080 /* open state has been lost */ 470#define NFS_OPEN_FILE_REOPEN 0x0100 /* file needs to be reopened */ 471#define NFS_OPEN_FILE_REOPENING 0x0200 /* file is being reopened */ 472 473struct nfs_lock_owner; 474/* 475 * NFS file lock 476 * 477 * Each lock request (pending or granted) has an 478 * nfs_file_lock structure representing its state. 479 */ 480struct nfs_file_lock { 481 TAILQ_ENTRY(nfs_file_lock) nfl_link; /* List of locks on nfsnode */ 482 TAILQ_ENTRY(nfs_file_lock) nfl_lolink; /* List of locks held by locker */ 483 struct nfs_lock_owner * nfl_owner; /* lock owner that holds this lock */ 484 uint64_t nfl_start; /* starting offset */ 485 uint64_t nfl_end; /* ending offset (inclusive) */ 486 uint32_t nfl_blockcnt; /* # locks blocked on this lock */ 487 uint16_t nfl_flags; /* see below */ 488 uint8_t nfl_type; /* lock type: read/write */ 489}; 490/* nfl_flags */ 491#define NFS_FILE_LOCK_ALLOC 0x01 /* lock was allocated */ 492#define NFS_FILE_LOCK_STYLE_POSIX 0x02 /* POSIX-style fcntl() lock */ 493#define NFS_FILE_LOCK_STYLE_FLOCK 0x04 /* flock(2)-style lock */ 494#define NFS_FILE_LOCK_STYLE_MASK 0x06 /* lock style mask */ 495#define NFS_FILE_LOCK_WAIT 0x08 /* may block on conflicting locks */ 496#define NFS_FILE_LOCK_BLOCKED 0x10 /* request is blocked */ 497#define NFS_FILE_LOCK_DEAD 0x20 /* lock (request) no longer exists */ 498#define NFS_FILE_LOCK_DELEGATED 0x40 /* lock acquired via delegation */ 499 500TAILQ_HEAD(nfs_file_lock_queue, nfs_file_lock); 501 502/* 503 * Calculate length of lock range given the endpoints. 504 * Note that struct flock has "to EOF" reported as 0 but 505 * the NFSv4 protocol has "to EOF" reported as UINT64_MAX. 506 */ 507#define NFS_FLOCK_LENGTH(S, E) (((E) == UINT64_MAX) ? 0 : ((E) - (S) + 1)) 508#define NFS_LOCK_LENGTH(S, E) (((E) == UINT64_MAX) ? UINT64_MAX : ((E) - (S) + 1)) 509 510/* 511 * NFSv4 lock owner structure - per open owner per process per nfsnode 512 * 513 * A lock owner is a process + an nfsnode. 514 * 515 * Note that flock(2) locks technically should have the lock owner be 516 * an fglob pointer instead of a process. However, implementing that 517 * correctly would not be trivial. So, for now, flock(2) locks are 518 * essentially treated like whole-file POSIX locks. 519 */ 520struct nfs_lock_owner { 521 lck_mtx_t nlo_lock; /* owner mutex */ 522 TAILQ_ENTRY(nfs_lock_owner) nlo_link; /* List of lock owners (on nfsnode) */ 523 struct nfs_open_owner * nlo_open_owner; /* corresponding open owner */ 524 struct nfs_file_lock_queue nlo_locks; /* list of locks held */ 525 struct nfs_file_lock nlo_alock; /* most lockers will only ever have one */ 526 struct timeval nlo_pid_start; /* Start time of process id */ 527 pid_t nlo_pid; /* lock-owning process ID */ 528 uint32_t nlo_refcnt; /* # outstanding references */ 529 uint32_t nlo_flags; /* see below */ 530 uint32_t nlo_name; /* unique name used otw */ 531 uint32_t nlo_seqid; /* client-side sequence ID */ 532 uint32_t nlo_stategenid; /* mount state generation ID */ 533 nfs_stateid nlo_stateid; /* lock stateid */ 534}; 535/* nlo_flags */ 536#define NFS_LOCK_OWNER_LINK 0x1 /* linked into mount's lock owner list */ 537#define NFS_LOCK_OWNER_BUSY 0x2 /* lock state-modifying operation in progress */ 538#define NFS_LOCK_OWNER_WANT 0x4 /* someone else wants to mark busy */ 539 540/* 541 * The nfsnode is the NFS equivalent of an inode. 542 * There is a unique nfsnode for each NFS vnode. 543 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 544 * NB: Hopefully the current order of the fields is such that everything will 545 * be well aligned and, therefore, tightly packed. 546 */ 547 548#define NFS_ACCESS_CACHE_SIZE 3 549 550struct nfsnode { 551 lck_mtx_t n_lock; /* nfs node lock */ 552 lck_rw_t n_datalock; /* nfs node data lock */ 553 void *n_datalockowner;/* nfs node data lock owner (exclusive) */ 554 LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ 555 LIST_ENTRY(nfsnode) n_monlink; /* list of monitored nodes */ 556 u_quad_t n_size; /* Current size of file */ 557 u_quad_t n_newsize; /* new size of file (pending update) */ 558 u_int64_t n_xid; /* last xid to loadattr */ 559 struct nfs_vattr n_vattr; /* Vnode attribute cache */ 560 time_t n_attrstamp; /* Attr. cache timestamp */ 561 time_t n_aclstamp; /* ACL cache timestamp */ 562 time_t n_evtstamp; /* last vnode event timestamp */ 563 uint32_t n_events; /* pending vnode events */ 564 u_int8_t n_access[NFS_ACCESS_CACHE_SIZE+1]; /* ACCESS cache */ 565 uid_t n_accessuid[NFS_ACCESS_CACHE_SIZE]; /* credentials having access */ 566 time_t n_accessstamp[NFS_ACCESS_CACHE_SIZE]; /* access cache timestamp */ 567 union { 568 struct { 569 struct timespec n3_mtime; /* Prev modify time. */ 570 struct timespec n3_ncmtime; /* namecache modify time. */ 571 } v3; 572 struct { 573 uint64_t n4_change; /* prev change attribute */ 574 uint64_t n4_ncchange; /* namecache change attribute */ 575 u_char *n4_attrdirfh; /* associated attr directory fh */ 576 struct timeval n4_lastio; /* time of most recent I/O on attr */ 577 } v4; 578 } n_un4; 579 vnode_t n_parent; /* this node's parent */ 580 u_char *n_fhp; /* NFS File Handle */ 581 vnode_t n_vnode; /* associated vnode */ 582 mount_t n_mount; /* associated mount (NHINIT) */ 583 int n_error; /* Save write error value */ 584 union { 585 struct timespec ns_atim; /* Special file times */ 586 daddr64_t nf_lastread; /* last block# read from (for readahead) */ 587 uint64_t nd_cookieverf; /* Cookie verifier (dir only) */ 588 } n_un1; 589 union { 590 struct timespec ns_mtim; /* Special file times */ 591 daddr64_t nf_lastrahead; /* last block# read ahead */ 592 uint64_t nd_eofcookie; /* Dir. EOF cookie cache */ 593 } n_un2; 594 union { 595 struct nfs_sillyrename *nf_silly;/* Ptr to silly rename struct */ 596 struct nfsdmap *nd_cookiecache; /* dir cookie cache */ 597 } n_un3; 598 uint32_t n_flag; /* node flags */ 599 u_short n_fhsize; /* size in bytes, of fh */ 600 u_short n_hflag; /* node hash flags */ 601 u_short n_bflag; /* node buffer flags */ 602 u_short n_mflag; /* node mount flags */ 603 u_char n_fh[NFS_SMALLFH];/* Small File Handle */ 604 uint32_t n_auth; /* security flavor used for this node */ 605 struct nfsbuflists n_cleanblkhd; /* clean blocklist head */ 606 struct nfsbuflists n_dirtyblkhd; /* dirty blocklist head */ 607 union { 608 int nf_wrbusy; /* # threads in write/fsync */ 609 uint32_t nd_ncgen; /* dir name cache generation# */ 610 } n_un5; 611 union { 612 int nf_needcommitcnt;/* # bufs that need committing */ 613 daddr64_t nd_lastdbl; /* last dir buf lookup block# */ 614 } n_un6; 615 int n_bufiterflags; /* buf iterator flags */ 616 union { 617 int nf_numoutput; /* write I/Os in progress */ 618 int nd_trigseq; /* vnode trigger seq# */ 619 } n_un7; 620 /* open state */ 621 lck_mtx_t n_openlock; /* nfs node open lock */ 622 uint32_t n_openflags; /* open state flags */ 623 uint32_t n_openrefcnt; /* # non-file opens */ 624 TAILQ_HEAD(,nfs_open_file) n_opens; /* list of open files */ 625 /* lock state */ 626 TAILQ_HEAD(, nfs_lock_owner) n_lock_owners; /* list of lock owners */ 627 struct nfs_file_lock_queue n_locks; /* list of locks */ 628 /* delegation state */ 629 nfs_stateid n_dstateid; /* delegation stateid */ 630 TAILQ_ENTRY(nfsnode) n_dlink; /* delegation list link */ 631 TAILQ_ENTRY(nfsnode) n_dreturn; /* delegation return list link */ 632 struct kauth_ace n_dace; /* delegation ACE */ 633}; 634 635#define NFS_DATA_LOCK_SHARED 1 636#define NFS_DATA_LOCK_EXCLUSIVE 2 637 638#define nfstimespeccmp(tvp, uvp, cmp) \ 639 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 640 ((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \ 641 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 642 643#define CHECK_NEEDCOMMITCNT(np) \ 644 do { \ 645 if ((np)->n_needcommitcnt < 0) { \ 646 printf("nfs: n_needcommitcnt negative\n"); \ 647 (np)->n_needcommitcnt = 0; \ 648 } \ 649 } while (0) 650 651#define n_atim n_un1.ns_atim 652#define n_mtim n_un2.ns_mtim 653#define n_lastread n_un1.nf_lastread 654#define n_lastrahead n_un2.nf_lastrahead 655#define n_sillyrename n_un3.nf_silly 656#define n_wrbusy n_un5.nf_wrbusy 657#define n_needcommitcnt n_un6.nf_needcommitcnt 658#define n_numoutput n_un7.nf_numoutput 659#define n_cookieverf n_un1.nd_cookieverf 660#define n_eofcookie n_un2.nd_eofcookie 661#define n_cookiecache n_un3.nd_cookiecache 662#define n_ncgen n_un5.nd_ncgen 663#define n_lastdbl n_un6.nd_lastdbl 664#define n_trigseq n_un7.nd_trigseq 665#define n_mtime n_un4.v3.n3_mtime 666#define n_ncmtime n_un4.v3.n3_ncmtime 667#define n_change n_un4.v4.n4_change 668#define n_ncchange n_un4.v4.n4_ncchange 669#define n_attrdirfh n_un4.v4.n4_attrdirfh 670#define n_lastio n_un4.v4.n4_lastio 671 672/* 673 * Flags for n_flag 674 */ 675#define NUPDATESIZE 0x00001 /* size of file needs updating */ 676#define NREVOKE 0x00002 /* node revoked */ 677#define NMODIFIED 0x00004 /* Might have a modified buffer in bio */ 678#define NWRITEERR 0x00008 /* Flag write errors so close will know */ 679#define NNEEDINVALIDATE 0x00010 /* need to call vinvalbuf() */ 680#define NGETATTRINPROG 0x00020 /* GETATTR RPC in progress */ 681#define NGETATTRWANT 0x00040 /* waiting for GETATTR RPC */ 682#define NACC 0x00100 /* Special file accessed */ 683#define NUPD 0x00200 /* Special file updated */ 684#define NCHG 0x00400 /* Special file times changed */ 685#define NNEGNCENTRIES 0x00800 /* directory has negative name cache entries */ 686#define NBUSY 0x01000 /* node is busy */ 687#define NBUSYWANT 0x02000 /* waiting on busy node */ 688#define NISDOTZFS 0x04000 /* a ".zfs" directory */ 689#define NISDOTZFSCHILD 0x08000 /* a child of a ".zfs" directory */ 690#define NISMAPPED 0x10000 /* node is mmapped */ 691 692/* 693 * Flags for n_hflag 694 * Note: protected by nfs_node_hash_mutex 695 */ 696#define NHHASHED 0x0001 /* node is in hash table */ 697#define NHINIT 0x0002 /* node is being initialized */ 698#define NHLOCKED 0x0004 /* node is locked (initting or deleting) */ 699#define NHLOCKWANT 0x0008 /* someone wants to lock */ 700 701/* 702 * Flags for n_bflag 703 * Note: protected by nfs_buf_mutex 704 */ 705#define NBFLUSHINPROG 0x0001 /* Avoid multiple calls to nfs_flush() */ 706#define NBFLUSHWANT 0x0002 /* waiting for nfs_flush() to complete */ 707#define NBINVALINPROG 0x0004 /* Avoid multiple calls to nfs_vinvalbuf() */ 708#define NBINVALWANT 0x0008 /* waiting for nfs_vinvalbuf() to complete */ 709 710/* 711 * Flags for n_mflag 712 * Note: protected by nfsmount's nm_lock 713 */ 714#define NMMONSCANINPROG 0x0001 /* monitored node is currently updating attributes */ 715#define NMMONSCANWANT 0x0002 /* waiting for attribute update to complete */ 716 717/* 718 * n_openflags 719 * Note: protected by n_openlock 720 */ 721#define N_OPENBUSY 0x0001 /* open state is busy - being updated */ 722#define N_OPENWANT 0x0002 /* someone wants to mark busy */ 723#define N_DELEG_READ 0x0004 /* we have a read delegation */ 724#define N_DELEG_WRITE 0x0008 /* we have a write delegation */ 725#define N_DELEG_MASK 0x000c /* delegation mask */ 726#define N_DELEG_RETURN 0x0010 /* delegation queued for return */ 727#define N_DELEG_RETURNING 0x0020 /* delegation being returned */ 728 729/* attr/access/ACL cache timestamp macros */ 730#define NATTRVALID(np) ((np)->n_attrstamp != ~0) 731#define NATTRINVALIDATE(np) ((np)->n_attrstamp = ~0) 732#define NACCESSVALID(np, slot) (((slot) >= 0) && ((slot) < NFS_ACCESS_CACHE_SIZE) && ((np)->n_accessstamp[(slot)] != ~0)) 733#define NACCESSINVALIDATE(np) \ 734 do { \ 735 int __i; \ 736 for (__i=0; __i < NFS_ACCESS_CACHE_SIZE; __i++) \ 737 (np)->n_accessstamp[__i] = ~0; \ 738 (np)->n_access[NFS_ACCESS_CACHE_SIZE] = 0; \ 739 } while (0) 740#define NACLVALID(np) ((np)->n_aclstamp != ~0) 741#define NACLINVALIDATE(np) ((np)->n_aclstamp = ~0) 742 743/* 744 * NFS-specific flags for nfs_vinvalbuf/nfs_flush 745 */ 746#define V_IGNORE_WRITEERR 0x8000 747 748/* 749 * Flags for nfs_nget() 750 */ 751#define NG_MARKROOT 0x0001 /* mark vnode as root of FS */ 752#define NG_MAKEENTRY 0x0002 /* add name cache entry for vnode */ 753#define NG_NOCREATE 0x0004 /* don't create a new node, return existing one */ 754 755/* 756 * Convert between nfsnode pointers and vnode pointers 757 */ 758#define VTONFS(vp) ((nfsnode_t)vnode_fsnode(vp)) 759#define NFSTOV(np) ((np)->n_vnode) 760 761/* nfsnode hash table mutex */ 762extern lck_mtx_t *nfs_node_hash_mutex; 763 764/* 765 * printf-like helper macro that also outputs node name. 766 */ 767#define NP(NP, FMT, ...) \ 768 do { \ 769 const char *__vname = (NP) ? vnode_getname(NFSTOV(NP)) : NULL; \ 770 printf(FMT " %s\n", ##__VA_ARGS__, __vname ? __vname : "???"); \ 771 if (__vname) vnode_putname(__vname); \ 772 } while (0) 773 774/* 775 * nfsiod structures 776 */ 777struct nfsiod { 778 TAILQ_ENTRY(nfsiod) niod_link; /* List of nfsiods */ 779 struct nfsmount * niod_nmp; /* mount point for this nfsiod */ 780}; 781TAILQ_HEAD(nfsiodlist, nfsiod); 782TAILQ_HEAD(nfsiodmountlist, nfsmount); 783extern struct nfsiodlist nfsiodfree, nfsiodwork; 784extern struct nfsiodmountlist nfsiodmounts; 785extern lck_mtx_t *nfsiod_mutex; 786 787#if defined(KERNEL) 788 789typedef int vnop_t(void *); 790extern vnop_t **fifo_nfsv2nodeop_p; 791extern vnop_t **nfsv2_vnodeop_p; 792extern vnop_t **spec_nfsv2nodeop_p; 793extern vnop_t **fifo_nfsv4nodeop_p; 794extern vnop_t **nfsv4_vnodeop_p; 795extern vnop_t **spec_nfsv4nodeop_p; 796 797/* 798 * Prototypes for NFS vnode operations 799 */ 800#define nfs_vnop_revoke nop_revoke 801int nfs_vnop_inactive(struct vnop_inactive_args *); 802int nfs_vnop_reclaim(struct vnop_reclaim_args *); 803 804int nfs_node_lock(nfsnode_t); 805int nfs_node_lock_internal(nfsnode_t, int); 806void nfs_node_lock_force(nfsnode_t); 807void nfs_node_unlock(nfsnode_t); 808int nfs_node_lock2(nfsnode_t, nfsnode_t); 809void nfs_node_unlock2(nfsnode_t, nfsnode_t); 810int nfs_node_set_busy(nfsnode_t, thread_t); 811int nfs_node_set_busy2(nfsnode_t, nfsnode_t, thread_t); 812int nfs_node_set_busy4(nfsnode_t, nfsnode_t, nfsnode_t, nfsnode_t, thread_t); 813void nfs_node_clear_busy(nfsnode_t); 814void nfs_node_clear_busy2(nfsnode_t, nfsnode_t); 815void nfs_node_clear_busy4(nfsnode_t, nfsnode_t, nfsnode_t, nfsnode_t); 816void nfs_data_lock(nfsnode_t, int); 817void nfs_data_lock_noupdate(nfsnode_t, int); 818void nfs_data_lock_internal(nfsnode_t, int, int); 819void nfs_data_unlock(nfsnode_t); 820void nfs_data_unlock_noupdate(nfsnode_t); 821void nfs_data_unlock_internal(nfsnode_t, int); 822void nfs_data_update_size(nfsnode_t, int); 823 824/* other stuff */ 825int nfs_removeit(struct nfs_sillyrename *); 826int nfs_nget(mount_t,nfsnode_t,struct componentname *,u_char *,int,struct nfs_vattr *,u_int64_t *,uint32_t,int,nfsnode_t*); 827int nfs_mount_is_dirty(mount_t); 828void nfs_dir_cookie_cache(nfsnode_t, uint64_t, uint64_t); 829int nfs_dir_cookie_to_lbn(nfsnode_t, uint64_t, int *, uint64_t *); 830void nfs_invaldir(nfsnode_t); 831uint32_t nfs_dir_buf_freespace(struct nfsbuf *, int); 832 833/* nfsbuf functions */ 834void nfs_nbinit(void); 835void nfs_buf_timer(void *, void *); 836void nfs_buf_remfree(struct nfsbuf *); 837boolean_t nfs_buf_is_incore(nfsnode_t, daddr64_t); 838struct nfsbuf * nfs_buf_incore(nfsnode_t, daddr64_t); 839int nfs_buf_get(nfsnode_t, daddr64_t, uint32_t, thread_t, int, struct nfsbuf **); 840int nfs_buf_upl_setup(struct nfsbuf *bp); 841void nfs_buf_upl_check(struct nfsbuf *bp); 842void nfs_buf_normalize_valid_range(nfsnode_t, struct nfsbuf *); 843int nfs_buf_map(struct nfsbuf *); 844void nfs_buf_release(struct nfsbuf *, int); 845int nfs_buf_iowait(struct nfsbuf *); 846void nfs_buf_iodone(struct nfsbuf *); 847void nfs_buf_write_delayed(struct nfsbuf *); 848void nfs_buf_check_write_verifier(nfsnode_t, struct nfsbuf *); 849void nfs_buf_freeup(int); 850void nfs_buf_refget(struct nfsbuf *bp); 851void nfs_buf_refrele(struct nfsbuf *bp); 852void nfs_buf_drop(struct nfsbuf *); 853errno_t nfs_buf_acquire(struct nfsbuf *, int, int, int); 854int nfs_buf_iterprepare(nfsnode_t, struct nfsbuflists *, int); 855void nfs_buf_itercomplete(nfsnode_t, struct nfsbuflists *, int); 856 857int nfs_bioread(nfsnode_t, uio_t, int, vfs_context_t); 858int nfs_buf_readahead(nfsnode_t, int, daddr64_t *, daddr64_t, thread_t, kauth_cred_t); 859int nfs_buf_readdir(struct nfsbuf *, vfs_context_t); 860int nfs_buf_read(struct nfsbuf *); 861void nfs_buf_read_finish(struct nfsbuf *); 862int nfs_buf_read_rpc(struct nfsbuf *, thread_t, kauth_cred_t); 863void nfs_buf_read_rpc_finish(struct nfsreq *); 864int nfs_buf_write(struct nfsbuf *); 865void nfs_buf_write_finish(struct nfsbuf *, thread_t, kauth_cred_t); 866int nfs_buf_write_rpc(struct nfsbuf *, int, thread_t, kauth_cred_t); 867void nfs_buf_write_rpc_finish(struct nfsreq *); 868int nfs_buf_write_dirty_pages(struct nfsbuf *, thread_t, kauth_cred_t); 869 870int nfs_flushcommits(nfsnode_t, int); 871int nfs_flush(nfsnode_t, int, thread_t, int); 872void nfs_buf_delwri_push(int); 873void nfs_buf_delwri_service(void); 874void nfs_buf_delwri_thread(void *, wait_result_t);; 875 876int nfsiod_start(void); 877void nfsiod_terminate(struct nfsiod *); 878void nfsiod_thread(void); 879int nfsiod_continue(int); 880void nfs_asyncio_finish(struct nfsreq *); 881void nfs_asyncio_resend(struct nfsreq *); 882int nfs_async_write_start(struct nfsmount *); 883void nfs_async_write_done(struct nfsmount *); 884 885#endif /* KERNEL */ 886 887#endif /* __APPLE_API_PRIVATE */ 888#endif /* _NFS_NFSNODE_H_ */ 889