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 198extern lck_mtx_t *nfs_buf_mutex; 199extern int nfsbufcnt, nfsbufmin, nfsbufmax, nfsbufmetacnt, nfsbufmetamax; 200extern int nfsbuffreecnt, nfsbuffreemetacnt, nfsbufdelwricnt, nfsneedbuffer; 201extern int nfs_nbdwrite; 202extern struct nfsbuffreehead nfsbuffree, nfsbufdelwri; 203 204#ifdef NFSBUFDEBUG 205#define NFSBUFCNTCHK() \ 206 do { \ 207 if ( (nfsbufcnt < 0) || \ 208 (nfsbufcnt > nfsbufmax) || \ 209 (nfsbufmetacnt < 0) || \ 210 (nfsbufmetacnt > nfsbufmetamax) || \ 211 (nfsbufmetacnt > nfsbufcnt) || \ 212 (nfsbuffreecnt < 0) || \ 213 (nfsbuffreecnt > nfsbufmax) || \ 214 (nfsbuffreecnt > nfsbufcnt) || \ 215 (nfsbuffreemetacnt < 0) || \ 216 (nfsbuffreemetacnt > nfsbufmax) || \ 217 (nfsbuffreemetacnt > nfsbufcnt) || \ 218 (nfsbuffreemetacnt > nfsbufmetamax) || \ 219 (nfsbuffreemetacnt > nfsbufmetacnt) || \ 220 (nfsbufdelwricnt < 0) || \ 221 (nfsbufdelwricnt > nfsbufmax) || \ 222 (nfsbufdelwricnt > nfsbufcnt) || \ 223 (nfs_nbdwrite < 0) || \ 224 (nfs_nbdwrite > nfsbufcnt) || \ 225 0) \ 226 panic("nfsbuf count error: max %d meta %d cnt %d meta %d free %d meta %d delwr %d bdw %d\n", \ 227 nfsbufmax, nfsbufmetamax, nfsbufcnt, nfsbufmetacnt, nfsbuffreecnt, nfsbuffreemetacnt, \ 228 nfsbufdelwricnt, nfs_nbdwrite); \ 229 } while (0) 230#else 231#define NFSBUFCNTCHK() 232#endif 233 234/* 235 * NFS directory buffer 236 * 237 * Each buffer for a directory consists of: 238 * 239 * - a small header 240 * - a packed list of direntry structures 241 * (if RDIRPLUS is enabled, a file handle and attrstamp are 242 * packed after the direntry name.) 243 * - free/unused space 244 * - if RDIRPLUS is enabled, an array of attributes 245 * that is indexed backwards from the end of the buffer. 246 */ 247struct nfs_dir_buf_header { 248 uint16_t ndbh_flags; /* flags (see below) */ 249 uint16_t ndbh_count; /* # of entries */ 250 uint32_t ndbh_entry_end; /* end offset of direntry data */ 251 uint32_t ndbh_ncgen; /* name cache generation# */ 252 uint32_t ndbh_pad; /* reserved */ 253}; 254/* ndbh_flags */ 255#define NDB_FULL 0x0001 /* buffer has been filled */ 256#define NDB_EOF 0x0002 /* buffer contains EOF */ 257#define NDB_PLUS 0x0004 /* buffer contains RDIRPLUS data */ 258 259#define NFS_DIR_BUF_FIRST_DIRENTRY(BP) \ 260 ((struct direntry*)((char*)((BP)->nb_data) + sizeof(*ndbhp))) 261#define NFS_DIR_BUF_NVATTR(BP, IDX) \ 262 (&((struct nfs_vattr*)((char*)((BP)->nb_data) + (BP)->nb_bufsize))[-((IDX)+1)]) 263#define NFS_DIRENTRY_LEN(namlen) \ 264 ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 7) & ~7) 265#define NFS_DIRENT_LEN(namlen) \ 266 ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen) + 1 + 3) &~ 3)) 267#define NFS_DIRENTRY_NEXT(DP) \ 268 ((struct direntry*)((char*)(DP) + (DP)->d_reclen)) 269#define NFS_DIR_COOKIE_POTENTIALLY_TRUNCATED(C) \ 270 ((C) && ((((C) >> 32) == 0) || (((C) & 0x80000000ULL) && (((C) >> 32) == 0xffffffff)))) 271#define NFS_DIR_COOKIE_SAME32(C1, C2) \ 272 (((C1) & 0xffffffffULL) == ((C2) & 0xffffffffULL)) 273 274/* 275 * NFS directory cookie cache 276 * 277 * This structure is used to cache cookie-to-buffer mappings for 278 * cookies recently returned from READDIR. The entries are kept in an 279 * array. The most-recently-used (MRU) list is headed by the entry at 280 * index "mru". The index of the next entry in the list is kept in the 281 * "next" array. (An index value of -1 marks an invalid entry.) 282 */ 283#define NFSNUMCOOKIES 14 284struct nfsdmap { 285 int8_t free; /* next unused slot */ 286 int8_t mru; /* head of MRU list */ 287 int8_t next[NFSNUMCOOKIES]; /* MRU list links */ 288 struct { 289 uint64_t key; /* cookie */ 290 uint64_t lbn; /* lbn of buffer */ 291 } cookies[NFSNUMCOOKIES]; /* MRU list entries */ 292}; 293 294/* 295 * NFS vnode attribute structure 296 */ 297#define NFSTIME_ACCESS 0 /* time of last access */ 298#define NFSTIME_MODIFY 1 /* time of last modification */ 299#define NFSTIME_CHANGE 2 /* time file changed */ 300#define NFSTIME_CREATE 3 /* time file created */ 301#define NFSTIME_BACKUP 4 /* time of last backup */ 302#define NFSTIME_COUNT 5 303 304#define NFS_COMPARE_MTIME(TVP, NVAP, CMP) \ 305 (((TVP)->tv_sec == (NVAP)->nva_timesec[NFSTIME_MODIFY]) ? \ 306 ((TVP)->tv_nsec CMP (NVAP)->nva_timensec[NFSTIME_MODIFY]) : \ 307 ((TVP)->tv_sec CMP (NVAP)->nva_timesec[NFSTIME_MODIFY])) 308#define NFS_COPY_TIME(TVP, NVAP, WHICH) \ 309 do { \ 310 (TVP)->tv_sec = (NVAP)->nva_timesec[NFSTIME_##WHICH]; \ 311 (TVP)->tv_nsec = (NVAP)->nva_timensec[NFSTIME_##WHICH]; \ 312 } while (0) 313 314struct nfs_vattr { 315 enum vtype nva_type; /* vnode type (for create) */ 316 uint32_t nva_mode; /* file's access mode (and type) */ 317 uid_t nva_uid; /* owner user id */ 318 gid_t nva_gid; /* owner group id */ 319 guid_t nva_uuuid; /* owner user UUID */ 320 guid_t nva_guuid; /* owner group UUID */ 321 kauth_acl_t nva_acl; /* access control list */ 322 nfs_specdata nva_rawdev; /* device the special file represents */ 323 uint32_t nva_flags; /* file flags (see below) */ 324 uint32_t nva_maxlink; /* maximum # of links (v4) */ 325 uint64_t nva_nlink; /* number of references to file */ 326 uint64_t nva_fileid; /* file id */ 327 nfs_fsid nva_fsid; /* file system id */ 328 uint64_t nva_size; /* file size in bytes */ 329 uint64_t nva_bytes; /* bytes of disk space held by file */ 330 uint64_t nva_change; /* change attribute */ 331 int64_t nva_timesec[NFSTIME_COUNT]; 332 int32_t nva_timensec[NFSTIME_COUNT]; 333 uint32_t nva_bitmap[NFS_ATTR_BITMAP_LEN]; /* attributes that are valid */ 334}; 335 336/* nva_flags */ 337#define NFS_FFLAG_ARCHIVED 0x0001 338#define NFS_FFLAG_HIDDEN 0x0002 339#define NFS_FFLAG_HAS_NAMED_ATTRS 0x0004 /* file has named attributes */ 340#define NFS_FFLAG_TRIGGER 0x0008 /* node is a trigger/mirror mount point */ 341#define NFS_FFLAG_TRIGGER_REFERRAL 0x0010 /* trigger is a referral */ 342#define NFS_FFLAG_IS_ATTR 0x8000 /* file is a named attribute file/directory */ 343 344/* flags for nfs_getattr() */ 345#define NGA_CACHED 0x0001 /* use cached attributes (if still valid) */ 346#define NGA_UNCACHED 0x0002 /* fetch new attributes */ 347#define NGA_ACL 0x0004 /* fetch ACL */ 348#define NGA_MONITOR 0x0008 /* vnode monitor attr update poll */ 349#define NGA_SOFT 0x0010 /* use cached attributes if ETIMEOUT */ 350 351/* macros for initting/cleaning up nfs_vattr structures */ 352#define NVATTR_INIT(NVAP) \ 353 do { \ 354 NFS_CLEAR_ATTRIBUTES((NVAP)->nva_bitmap); \ 355 (NVAP)->nva_flags = 0; \ 356 (NVAP)->nva_acl = NULL; \ 357 } while (0) 358#define NVATTR_CLEANUP(NVAP) \ 359 do { \ 360 NFS_CLEAR_ATTRIBUTES((NVAP)->nva_bitmap); \ 361 if ((NVAP)->nva_acl) { \ 362 kauth_acl_free((NVAP)->nva_acl); \ 363 (NVAP)->nva_acl = NULL; \ 364 } \ 365 } while (0) 366 367/* 368 * macros for detecting node changes 369 * 370 * These macros help us determine if a file has been changed on the server and 371 * thus whether or not we need to invalidate any cached data. 372 * 373 * For NFSv2/v3, the modification time is used. 374 * For NFSv4, the change attribute is used. 375 */ 376#define NFS_CHANGED(VERS, NP, NVAP) \ 377 (((VERS) >= NFS_VER4) ? \ 378 ((NP)->n_change != (NVAP)->nva_change) : \ 379 NFS_COMPARE_MTIME(&(NP)->n_mtime, (NVAP), !=)) 380#define NFS_CHANGED_NC(VERS, NP, NVAP) \ 381 (((VERS) >= NFS_VER4) ? \ 382 ((NP)->n_ncchange != (NVAP)->nva_change) : \ 383 NFS_COMPARE_MTIME(&(NP)->n_ncmtime, (NVAP), !=)) 384#define NFS_CHANGED_UPDATE(VERS, NP, NVAP) \ 385 do { \ 386 if ((VERS) >= NFS_VER4) \ 387 (NP)->n_change = (NVAP)->nva_change; \ 388 else \ 389 NFS_COPY_TIME(&(NP)->n_mtime, (NVAP), MODIFY); \ 390 } while (0) 391#define NFS_CHANGED_UPDATE_NC(VERS, NP, NVAP) \ 392 do { \ 393 if ((VERS) >= NFS_VER4) \ 394 (NP)->n_ncchange = (NVAP)->nva_change; \ 395 else \ 396 NFS_COPY_TIME(&(NP)->n_ncmtime, (NVAP), MODIFY); \ 397 } while (0) 398 399 400extern lck_grp_t *nfs_open_grp; 401extern uint32_t nfs_open_owner_seqnum, nfs_lock_owner_seqnum; 402 403/* 404 * NFSv4 open owner structure - one per cred per mount 405 */ 406struct nfs_open_owner { 407 TAILQ_ENTRY(nfs_open_owner) noo_link; /* List of open owners (on mount) */ 408 lck_mtx_t noo_lock; /* owner mutex */ 409 struct nfsmount * noo_mount; /* NFS mount */ 410 uint32_t noo_refcnt; /* # outstanding references */ 411 uint32_t noo_flags; /* see below */ 412 kauth_cred_t noo_cred; /* credentials of open owner */ 413 uint32_t noo_name; /* unique name used otw */ 414 uint32_t noo_seqid; /* client-side sequence ID */ 415 TAILQ_HEAD(,nfs_open_file) noo_opens; /* list of open files */ 416}; 417/* noo_flags */ 418#define NFS_OPEN_OWNER_LINK 0x1 /* linked into mount's open owner list */ 419#define NFS_OPEN_OWNER_BUSY 0x2 /* open state-modifying operation in progress */ 420#define NFS_OPEN_OWNER_WANT 0x4 /* someone else wants to mark busy */ 421 422/* 423 * NFS open file structure - one per open owner per nfsnode 424 */ 425struct nfs_open_file { 426 lck_mtx_t nof_lock; /* open file mutex */ 427 TAILQ_ENTRY(nfs_open_file) nof_link; /* list of open files */ 428 TAILQ_ENTRY(nfs_open_file) nof_oolink; /* list of open owner's open files */ 429 struct nfs_open_owner * nof_owner; /* open owner */ 430 nfsnode_t nof_np; /* nfsnode this open is for */ 431 nfs_stateid nof_stateid; /* open stateid */ 432 thread_t nof_creator; /* thread that created file */ 433 uint32_t nof_opencnt; /* open file count */ 434 uint16_t nof_flags; /* see below */ 435 uint8_t nof_access:4; /* access mode for this open */ 436 uint8_t nof_deny:4; /* deny mode for this open */ 437 uint8_t nof_mmap_access:4; /* mmap open access mode */ 438 uint8_t nof_mmap_deny:4; /* mmap open deny mode */ 439 /* counts of access/deny mode open combinations */ 440 uint32_t nof_r; /* read opens (deny none) */ 441 uint32_t nof_w; /* write opens (deny none) */ 442 uint32_t nof_rw; /* read/write opens (deny none) */ 443 uint32_t nof_r_dw; /* read deny-write opens */ 444 /* the rest of the counts have a max of 2 (1 for open + 1 for mmap) */ 445 uint32_t nof_w_dw:2; /* write deny-write opens (max 2) */ 446 uint32_t nof_rw_dw:2; /* read/write deny-write opens (max 2) */ 447 uint32_t nof_r_drw:2; /* read deny-read/write opens (max 2) */ 448 uint32_t nof_w_drw:2; /* write deny-read/write opens (max 2) */ 449 uint32_t nof_rw_drw:2; /* read/write deny-read/write opens (max 2) */ 450 /* counts of DELEGATED access/deny mode open combinations */ 451 uint32_t nof_d_w_dw:2; /* write deny-write opens (max 2) */ 452 uint32_t nof_d_rw_dw:2; /* read/write deny-write opens (max 2) */ 453 uint32_t nof_d_r_drw:2; /* read deny-read/write opens (max 2) */ 454 uint32_t nof_d_w_drw:2; /* write deny-read/write opens (max 2) */ 455 uint32_t nof_d_rw_drw:2; /* read/write deny-read/write opens (max 2) */ 456 uint32_t nof_d_r; /* read opens (deny none) */ 457 uint32_t nof_d_w; /* write opens (deny none) */ 458 uint32_t nof_d_rw; /* read/write opens (deny none) */ 459 uint32_t nof_d_r_dw; /* read deny-write opens */ 460}; 461/* nof_flags */ 462#define NFS_OPEN_FILE_BUSY 0x0001 /* open state-modifying operation in progress */ 463#define NFS_OPEN_FILE_WANT 0x0002 /* someone else wants to mark busy */ 464#define NFS_OPEN_FILE_CREATE 0x0004 /* has an open(RW) from a "CREATE" call */ 465#define NFS_OPEN_FILE_NEEDCLOSE 0x0008 /* has an open(R) from an (unopen) VNOP_READ or VNOP_MMAP call */ 466#define NFS_OPEN_FILE_SETATTR 0x0020 /* has an open(W) to perform a SETATTR(size) */ 467#define NFS_OPEN_FILE_POSIXLOCK 0x0040 /* server supports POSIX locking semantics */ 468#define NFS_OPEN_FILE_LOST 0x0080 /* open state has been lost */ 469#define NFS_OPEN_FILE_REOPEN 0x0100 /* file needs to be reopened */ 470#define NFS_OPEN_FILE_REOPENING 0x0200 /* file is being reopened */ 471 472struct nfs_lock_owner; 473/* 474 * NFS file lock 475 * 476 * Each lock request (pending or granted) has an 477 * nfs_file_lock structure representing its state. 478 */ 479struct nfs_file_lock { 480 TAILQ_ENTRY(nfs_file_lock) nfl_link; /* List of locks on nfsnode */ 481 TAILQ_ENTRY(nfs_file_lock) nfl_lolink; /* List of locks held by locker */ 482 struct nfs_lock_owner * nfl_owner; /* lock owner that holds this lock */ 483 uint64_t nfl_start; /* starting offset */ 484 uint64_t nfl_end; /* ending offset (inclusive) */ 485 uint32_t nfl_blockcnt; /* # locks blocked on this lock */ 486 uint16_t nfl_flags; /* see below */ 487 uint8_t nfl_type; /* lock type: read/write */ 488}; 489/* nfl_flags */ 490#define NFS_FILE_LOCK_ALLOC 0x01 /* lock was allocated */ 491#define NFS_FILE_LOCK_STYLE_POSIX 0x02 /* POSIX-style fcntl() lock */ 492#define NFS_FILE_LOCK_STYLE_FLOCK 0x04 /* flock(2)-style lock */ 493#define NFS_FILE_LOCK_STYLE_MASK 0x06 /* lock style mask */ 494#define NFS_FILE_LOCK_WAIT 0x08 /* may block on conflicting locks */ 495#define NFS_FILE_LOCK_BLOCKED 0x10 /* request is blocked */ 496#define NFS_FILE_LOCK_DEAD 0x20 /* lock (request) no longer exists */ 497#define NFS_FILE_LOCK_DELEGATED 0x40 /* lock acquired via delegation */ 498 499TAILQ_HEAD(nfs_file_lock_queue, nfs_file_lock); 500 501/* 502 * Calculate length of lock range given the endpoints. 503 * Note that struct flock has "to EOF" reported as 0 but 504 * the NFSv4 protocol has "to EOF" reported as UINT64_MAX. 505 */ 506#define NFS_FLOCK_LENGTH(S, E) (((E) == UINT64_MAX) ? 0 : ((E) - (S) + 1)) 507#define NFS_LOCK_LENGTH(S, E) (((E) == UINT64_MAX) ? UINT64_MAX : ((E) - (S) + 1)) 508 509/* 510 * NFSv4 lock owner structure - per open owner per process per nfsnode 511 * 512 * A lock owner is a process + an nfsnode. 513 * 514 * Note that flock(2) locks technically should have the lock owner be 515 * an fglob pointer instead of a process. However, implementing that 516 * correctly would not be trivial. So, for now, flock(2) locks are 517 * essentially treated like whole-file POSIX locks. 518 */ 519struct nfs_lock_owner { 520 lck_mtx_t nlo_lock; /* owner mutex */ 521 TAILQ_ENTRY(nfs_lock_owner) nlo_link; /* List of lock owners (on nfsnode) */ 522 struct nfs_open_owner * nlo_open_owner; /* corresponding open owner */ 523 struct nfs_file_lock_queue nlo_locks; /* list of locks held */ 524 struct nfs_file_lock nlo_alock; /* most lockers will only ever have one */ 525 struct timeval nlo_pid_start; /* Start time of process id */ 526 pid_t nlo_pid; /* lock-owning process ID */ 527 uint32_t nlo_refcnt; /* # outstanding references */ 528 uint32_t nlo_flags; /* see below */ 529 uint32_t nlo_name; /* unique name used otw */ 530 uint32_t nlo_seqid; /* client-side sequence ID */ 531 uint32_t nlo_stategenid; /* mount state generation ID */ 532 nfs_stateid nlo_stateid; /* lock stateid */ 533}; 534/* nlo_flags */ 535#define NFS_LOCK_OWNER_LINK 0x1 /* linked into mount's lock owner list */ 536#define NFS_LOCK_OWNER_BUSY 0x2 /* lock state-modifying operation in progress */ 537#define NFS_LOCK_OWNER_WANT 0x4 /* someone else wants to mark busy */ 538 539/* 540 * The nfsnode is the NFS equivalent of an inode. 541 * There is a unique nfsnode for each NFS vnode. 542 * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) 543 * NB: Hopefully the current order of the fields is such that everything will 544 * be well aligned and, therefore, tightly packed. 545 */ 546 547#define NFS_ACCESS_CACHE_SIZE 3 548 549struct nfsnode { 550 lck_mtx_t n_lock; /* nfs node lock */ 551 lck_rw_t n_datalock; /* nfs node data lock */ 552 void *n_datalockowner;/* nfs node data lock owner (exclusive) */ 553 LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ 554 LIST_ENTRY(nfsnode) n_monlink; /* list of monitored nodes */ 555 u_quad_t n_size; /* Current size of file */ 556 u_quad_t n_newsize; /* new size of file (pending update) */ 557 u_int64_t n_xid; /* last xid to loadattr */ 558 struct nfs_vattr n_vattr; /* Vnode attribute cache */ 559 time_t n_attrstamp; /* Attr. cache timestamp */ 560 time_t n_aclstamp; /* ACL cache timestamp */ 561 time_t n_evtstamp; /* last vnode event timestamp */ 562 uint32_t n_events; /* pending vnode events */ 563 u_int8_t n_access[NFS_ACCESS_CACHE_SIZE+1]; /* ACCESS cache */ 564 uid_t n_accessuid[NFS_ACCESS_CACHE_SIZE]; /* credentials having access */ 565 time_t n_accessstamp[NFS_ACCESS_CACHE_SIZE]; /* access cache timestamp */ 566 union { 567 struct { 568 struct timespec n3_mtime; /* Prev modify time. */ 569 struct timespec n3_ncmtime; /* namecache modify time. */ 570 } v3; 571 struct { 572 uint64_t n4_change; /* prev change attribute */ 573 uint64_t n4_ncchange; /* namecache change attribute */ 574 u_char *n4_attrdirfh; /* associated attr directory fh */ 575 struct timeval n4_lastio; /* time of most recent I/O on attr */ 576 } v4; 577 } n_un4; 578 vnode_t n_parent; /* this node's parent */ 579 u_char *n_fhp; /* NFS File Handle */ 580 vnode_t n_vnode; /* associated vnode */ 581 mount_t n_mount; /* associated mount (NHINIT) */ 582 int n_error; /* Save write error value */ 583 union { 584 struct timespec ns_atim; /* Special file times */ 585 struct timespec nl_rltim; /* Time of last readlink */ 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_rltim n_un1.nl_rltim 654#define n_lastread n_un1.nf_lastread 655#define n_lastrahead n_un2.nf_lastrahead 656#define n_sillyrename n_un3.nf_silly 657#define n_wrbusy n_un5.nf_wrbusy 658#define n_needcommitcnt n_un6.nf_needcommitcnt 659#define n_numoutput n_un7.nf_numoutput 660#define n_cookieverf n_un1.nd_cookieverf 661#define n_eofcookie n_un2.nd_eofcookie 662#define n_cookiecache n_un3.nd_cookiecache 663#define n_ncgen n_un5.nd_ncgen 664#define n_lastdbl n_un6.nd_lastdbl 665#define n_trigseq n_un7.nd_trigseq 666#define n_mtime n_un4.v3.n3_mtime 667#define n_ncmtime n_un4.v3.n3_ncmtime 668#define n_change n_un4.v4.n4_change 669#define n_ncchange n_un4.v4.n4_ncchange 670#define n_attrdirfh n_un4.v4.n4_attrdirfh 671#define n_lastio n_un4.v4.n4_lastio 672 673/* 674 * Flags for n_flag 675 */ 676#define NUPDATESIZE 0x00001 /* size of file needs updating */ 677#define NREVOKE 0x00002 /* node revoked */ 678#define NMODIFIED 0x00004 /* Might have a modified buffer in bio */ 679#define NWRITEERR 0x00008 /* Flag write errors so close will know */ 680#define NNEEDINVALIDATE 0x00010 /* need to call vinvalbuf() */ 681#define NGETATTRINPROG 0x00020 /* GETATTR RPC in progress */ 682#define NGETATTRWANT 0x00040 /* waiting for GETATTR RPC */ 683#define NACC 0x00100 /* Special file accessed */ 684#define NUPD 0x00200 /* Special file updated */ 685#define NCHG 0x00400 /* Special file times changed */ 686#define NNEGNCENTRIES 0x00800 /* directory has negative name cache entries */ 687#define NBUSY 0x01000 /* node is busy */ 688#define NBUSYWANT 0x02000 /* waiting on busy node */ 689#define NISDOTZFS 0x04000 /* a ".zfs" directory */ 690#define NISDOTZFSCHILD 0x08000 /* a child of a ".zfs" directory */ 691#define NISMAPPED 0x10000 /* node is mmapped */ 692#define NREFRESH 0x20000 /* node's fh needs to be refreshed */ 693#define NREFRESHWANT 0x40000 /* Waiting for fh to be refreshed */ 694 695/* 696 * Flags for n_hflag 697 * Note: protected by nfs_node_hash_mutex 698 */ 699#define NHHASHED 0x0001 /* node is in hash table */ 700#define NHINIT 0x0002 /* node is being initialized */ 701#define NHLOCKED 0x0004 /* node is locked (initting or deleting) */ 702#define NHLOCKWANT 0x0008 /* someone wants to lock */ 703 704/* 705 * Flags for n_bflag 706 * Note: protected by nfs_buf_mutex 707 */ 708#define NBFLUSHINPROG 0x0001 /* Avoid multiple calls to nfs_flush() */ 709#define NBFLUSHWANT 0x0002 /* waiting for nfs_flush() to complete */ 710#define NBINVALINPROG 0x0004 /* Avoid multiple calls to nfs_vinvalbuf() */ 711#define NBINVALWANT 0x0008 /* waiting for nfs_vinvalbuf() to complete */ 712 713/* 714 * Flags for n_mflag 715 * Note: protected by nfsmount's nm_lock 716 */ 717#define NMMONSCANINPROG 0x0001 /* monitored node is currently updating attributes */ 718#define NMMONSCANWANT 0x0002 /* waiting for attribute update to complete */ 719 720/* 721 * n_openflags 722 * Note: protected by n_openlock 723 */ 724#define N_OPENBUSY 0x0001 /* open state is busy - being updated */ 725#define N_OPENWANT 0x0002 /* someone wants to mark busy */ 726#define N_DELEG_READ 0x0004 /* we have a read delegation */ 727#define N_DELEG_WRITE 0x0008 /* we have a write delegation */ 728#define N_DELEG_MASK 0x000c /* delegation mask */ 729#define N_DELEG_RETURN 0x0010 /* delegation queued for return */ 730#define N_DELEG_RETURNING 0x0020 /* delegation being returned */ 731 732/* attr/access/ACL cache timestamp macros */ 733#define NATTRVALID(np) ((np)->n_attrstamp != ~0) 734#define NATTRINVALIDATE(np) ((np)->n_attrstamp = ~0) 735#define NACCESSVALID(np, slot) (((slot) >= 0) && ((slot) < NFS_ACCESS_CACHE_SIZE) && ((np)->n_accessstamp[(slot)] != ~0)) 736#define NACCESSINVALIDATE(np) \ 737 do { \ 738 int __i; \ 739 for (__i=0; __i < NFS_ACCESS_CACHE_SIZE; __i++) \ 740 (np)->n_accessstamp[__i] = ~0; \ 741 (np)->n_access[NFS_ACCESS_CACHE_SIZE] = 0; \ 742 } while (0) 743#define NACLVALID(np) ((np)->n_aclstamp != ~0) 744#define NACLINVALIDATE(np) ((np)->n_aclstamp = ~0) 745 746/* 747 * NFS-specific flags for nfs_vinvalbuf/nfs_flush 748 */ 749#define V_IGNORE_WRITEERR 0x8000 750 751/* 752 * Flags for nfs_nget() 753 */ 754#define NG_MARKROOT 0x0001 /* mark vnode as root of FS */ 755#define NG_MAKEENTRY 0x0002 /* add name cache entry for vnode */ 756#define NG_NOCREATE 0x0004 /* don't create a new node, return existing one */ 757 758/* 759 * Convert between nfsnode pointers and vnode pointers 760 */ 761#define VTONFS(vp) ((nfsnode_t)vnode_fsnode(vp)) 762#define NFSTOV(np) ((np)->n_vnode) 763 764/* nfsnode hash table mutex */ 765extern lck_mtx_t *nfs_node_hash_mutex; 766 767/* 768 * printf-like helper macro that also outputs node name. 769 */ 770#define NP(NP, FMT, ...) \ 771 do { \ 772 const char *__vname = (NP) ? vnode_getname(NFSTOV(NP)) : NULL; \ 773 printf(FMT " %s\n", ##__VA_ARGS__, __vname ? __vname : "???"); \ 774 if (__vname) vnode_putname(__vname); \ 775 } while (0) 776 777/* 778 * nfsiod structures 779 */ 780struct nfsiod { 781 TAILQ_ENTRY(nfsiod) niod_link; /* List of nfsiods */ 782 struct nfsmount * niod_nmp; /* mount point for this nfsiod */ 783}; 784TAILQ_HEAD(nfsiodlist, nfsiod); 785TAILQ_HEAD(nfsiodmountlist, nfsmount); 786extern struct nfsiodlist nfsiodfree, nfsiodwork; 787extern struct nfsiodmountlist nfsiodmounts; 788extern lck_mtx_t *nfsiod_mutex; 789 790#if defined(KERNEL) 791 792typedef int vnop_t(void *); 793extern vnop_t **fifo_nfsv2nodeop_p; 794extern vnop_t **nfsv2_vnodeop_p; 795extern vnop_t **spec_nfsv2nodeop_p; 796extern vnop_t **fifo_nfsv4nodeop_p; 797extern vnop_t **nfsv4_vnodeop_p; 798extern vnop_t **spec_nfsv4nodeop_p; 799 800/* 801 * Prototypes for NFS vnode operations 802 */ 803#define nfs_vnop_revoke nop_revoke 804int nfs_vnop_inactive(struct vnop_inactive_args *); 805int nfs_vnop_reclaim(struct vnop_reclaim_args *); 806 807int nfs_node_lock(nfsnode_t); 808int nfs_node_lock_internal(nfsnode_t, int); 809void nfs_node_lock_force(nfsnode_t); 810void nfs_node_unlock(nfsnode_t); 811int nfs_node_lock2(nfsnode_t, nfsnode_t); 812void nfs_node_unlock2(nfsnode_t, nfsnode_t); 813int nfs_node_set_busy(nfsnode_t, thread_t); 814int nfs_node_set_busy2(nfsnode_t, nfsnode_t, thread_t); 815int nfs_node_set_busy4(nfsnode_t, nfsnode_t, nfsnode_t, nfsnode_t, thread_t); 816void nfs_node_clear_busy(nfsnode_t); 817void nfs_node_clear_busy2(nfsnode_t, nfsnode_t); 818void nfs_node_clear_busy4(nfsnode_t, nfsnode_t, nfsnode_t, nfsnode_t); 819void nfs_data_lock(nfsnode_t, int); 820void nfs_data_lock_noupdate(nfsnode_t, int); 821void nfs_data_lock_internal(nfsnode_t, int, int); 822void nfs_data_unlock(nfsnode_t); 823void nfs_data_unlock_noupdate(nfsnode_t); 824void nfs_data_unlock_internal(nfsnode_t, int); 825void nfs_data_update_size(nfsnode_t, int); 826 827/* other stuff */ 828int nfs_removeit(struct nfs_sillyrename *); 829int nfs_nget(mount_t,nfsnode_t,struct componentname *,u_char *,int,struct nfs_vattr *,u_int64_t *,uint32_t,int,nfsnode_t*); 830int nfs_mount_is_dirty(mount_t); 831void nfs_dir_cookie_cache(nfsnode_t, uint64_t, uint64_t); 832int nfs_dir_cookie_to_lbn(nfsnode_t, uint64_t, int *, uint64_t *); 833void nfs_invaldir(nfsnode_t); 834uint32_t nfs_dir_buf_freespace(struct nfsbuf *, int); 835 836/* nfsbuf functions */ 837void nfs_nbinit(void); 838void nfs_buf_timer(void *, void *); 839void nfs_buf_remfree(struct nfsbuf *); 840boolean_t nfs_buf_is_incore(nfsnode_t, daddr64_t); 841struct nfsbuf * nfs_buf_incore(nfsnode_t, daddr64_t); 842int nfs_buf_get(nfsnode_t, daddr64_t, uint32_t, thread_t, int, struct nfsbuf **); 843int nfs_buf_upl_setup(struct nfsbuf *bp); 844void nfs_buf_upl_check(struct nfsbuf *bp); 845void nfs_buf_normalize_valid_range(nfsnode_t, struct nfsbuf *); 846int nfs_buf_map(struct nfsbuf *); 847void nfs_buf_release(struct nfsbuf *, int); 848int nfs_buf_iowait(struct nfsbuf *); 849void nfs_buf_iodone(struct nfsbuf *); 850void nfs_buf_write_delayed(struct nfsbuf *); 851void nfs_buf_check_write_verifier(nfsnode_t, struct nfsbuf *); 852void nfs_buf_freeup(int); 853void nfs_buf_refget(struct nfsbuf *bp); 854void nfs_buf_refrele(struct nfsbuf *bp); 855void nfs_buf_drop(struct nfsbuf *); 856errno_t nfs_buf_acquire(struct nfsbuf *, int, int, int); 857int nfs_buf_iterprepare(nfsnode_t, struct nfsbuflists *, int); 858void nfs_buf_itercomplete(nfsnode_t, struct nfsbuflists *, int); 859 860int nfs_bioread(nfsnode_t, uio_t, int, vfs_context_t); 861int nfs_buf_readahead(nfsnode_t, int, daddr64_t *, daddr64_t, thread_t, kauth_cred_t); 862int nfs_buf_readdir(struct nfsbuf *, vfs_context_t); 863int nfs_buf_read(struct nfsbuf *); 864void nfs_buf_read_finish(struct nfsbuf *); 865int nfs_buf_read_rpc(struct nfsbuf *, thread_t, kauth_cred_t); 866void nfs_buf_read_rpc_finish(struct nfsreq *); 867int nfs_buf_write(struct nfsbuf *); 868void nfs_buf_write_finish(struct nfsbuf *, thread_t, kauth_cred_t); 869int nfs_buf_write_rpc(struct nfsbuf *, int, thread_t, kauth_cred_t); 870void nfs_buf_write_rpc_finish(struct nfsreq *); 871int nfs_buf_write_dirty_pages(struct nfsbuf *, thread_t, kauth_cred_t); 872 873int nfs_flushcommits(nfsnode_t, int); 874int nfs_flush(nfsnode_t, int, thread_t, int); 875void nfs_buf_delwri_push(int); 876void nfs_buf_delwri_service(void); 877void nfs_buf_delwri_thread(void *, wait_result_t);; 878 879int nfsiod_start(void); 880void nfsiod_terminate(struct nfsiod *); 881void nfsiod_thread(void); 882int nfsiod_continue(int); 883void nfs_asyncio_finish(struct nfsreq *); 884void nfs_asyncio_resend(struct nfsreq *); 885int nfs_async_write_start(struct nfsmount *); 886void nfs_async_write_done(struct nfsmount *); 887 888#endif /* KERNEL */ 889 890#endif /* __APPLE_API_PRIVATE */ 891#endif /* _NFS_NFSNODE_H_ */ 892