1 /* $NetBSD: nfs.h,v 1.22 2000/06/09 00:00:17 fvdl Exp $ */ 2 /* 3 * Copyright (c) 1989, 1993, 1995 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Rick Macklem at The University of Guelph. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)nfs.h 8.4 (Berkeley) 5/1/95 38 */ 39 40 #ifndef _NFS_NFS_H_ 41 #define _NFS_NFS_H_ 42 43 /* 44 * Tunable constants for nfs 45 */ 46 47 #define NFS_MAXIOVEC 34 48 #define NFS_TICKINTVL 5 /* Desired time for a tick (msec) */ 49 #define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */ 50 #define NFS_TIMEO (3 * NFS_HZ) /* Default timeout = 3 seconds */ 51 #define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */ 52 #define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */ 53 #define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/ 54 #define NFS_MAXREXMIT 100 /* Stop counting after this many */ 55 #define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */ 56 #define NFS_RETRANS 10 /* Num of retrans for soft mounts */ 57 #define NFS_MAXGRPS 16 /* Max. size of groups list */ 58 #ifndef NFS_MINATTRTIMO 59 #define NFS_MINATTRTIMO 5 /* Attribute cache timeout in sec */ 60 #endif 61 #ifndef NFS_MAXATTRTIMO 62 #define NFS_MAXATTRTIMO 60 63 #endif 64 #define NFS_WSIZE 8192 /* Def. write data size <= 8192 */ 65 #define NFS_RSIZE 8192 /* Def. read data size <= 8192 */ 66 #define NFS_READDIRSIZE 8192 /* Def. readdir size */ 67 #define NFS_DEFRAHEAD 1 /* Def. read ahead # blocks */ 68 #define NFS_MAXRAHEAD 4 /* Max. read ahead # blocks */ 69 #define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */ 70 #define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */ 71 #ifdef _KERNEL 72 extern int nfs_niothreads; /* Number of async_daemons desired */ 73 #endif 74 #define NFS_MAXGATHERDELAY 100 /* Max. write gather delay (msec) */ 75 #ifndef NFS_GATHERDELAY 76 #define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */ 77 #endif 78 79 /* 80 * NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for 81 * NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount 82 * of data in those buffers, and thus the minimum amount of data 83 * that you can request. NFS_DIRFRAGSIZ should be no smaller than 84 * DIRBLKSIZ. 85 */ 86 87 #define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */ 88 #define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */ 89 90 /* 91 * Maximum number of directory entries cached per NFS node, to avoid 92 * having this grow without bounds on very large directories. The 93 * minimum size to get reasonable performance for emulated binaries 94 * is the maximum number of entries that fits in NFS_DIRBLKSIZ. 95 * For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36. 96 */ 97 #define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14) 98 99 /* 100 * Oddballs 101 */ 102 #define NMOD(a) ((a) % nfs_asyncdaemons) 103 #define NFS_CMPFH(n, f, s) \ 104 ((n)->n_fhsize == (s) && !memcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s))) 105 #define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3) 106 #define NFS_SRVMAXDATA(n) \ 107 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \ 108 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA) 109 110 /* 111 * The VA_EXCLUSIVE flag should be added for va_vaflags and set for an 112 * exclusive create. 113 */ 114 #ifndef VA_EXCLUSIVE 115 #define VA_EXCLUSIVE 0 116 #endif 117 118 /* 119 * The B_INVAFTERWRITE flag should be set to whatever is required by the 120 * buffer cache code to say "Invalidate the block after it is written back". 121 */ 122 #define B_INVAFTERWRITE B_INVAL 123 124 /* 125 * The IO_METASYNC flag should be implemented for local file systems. 126 * (Until then, it is nothin at all.) 127 */ 128 #ifndef IO_METASYNC 129 #define IO_METASYNC 0 130 #endif 131 132 /* 133 * Set the attribute timeout based on how recently the file has been modified. 134 */ 135 #define NFS_ATTRTIMEO(np) \ 136 ((((np)->n_flag & NMODIFIED) || \ 137 (time.tv_sec - (np)->n_mtime) / 10 < NFS_MINATTRTIMO) ? NFS_MINATTRTIMO : \ 138 ((time.tv_sec - (np)->n_mtime) / 10 > NFS_MAXATTRTIMO ? NFS_MAXATTRTIMO : \ 139 (time.tv_sec - (np)->n_mtime) / 10)) 140 141 /* 142 * Expected allocation sizes for major data structures. If the actual size 143 * of the structure exceeds these sizes, then malloc() will be allocating 144 * almost twice the memory required. This is used in nfs_init() to warn 145 * the sysadmin that the size of a structure should be reduced. 146 * (These sizes are always a power of 2. If the kernel malloc() changes 147 * to one that does not allocate space in powers of 2 size, then this all 148 * becomes bunk!) 149 */ 150 #define NFS_NODEALLOC 256 151 #define NFS_MNTALLOC 512 152 #define NFS_SVCALLOC 256 153 #define NFS_UIDALLOC 128 154 155 /* 156 * Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs 157 * should ever try and use it. 158 */ 159 struct nfsd_args { 160 int sock; /* Socket to serve */ 161 caddr_t name; /* Client addr for connection based sockets */ 162 int namelen; /* Length of name */ 163 }; 164 165 struct nfsd_srvargs { 166 struct nfsd *nsd_nfsd; /* Pointer to in kernel nfsd struct */ 167 uid_t nsd_uid; /* Effective uid mapped to cred */ 168 u_int32_t nsd_haddr; /* Ip address of client */ 169 struct ucred nsd_cr; /* Cred. uid maps to */ 170 int nsd_authlen; /* Length of auth string (ret) */ 171 u_char *nsd_authstr; /* Auth string (ret) */ 172 int nsd_verflen; /* and the verfier */ 173 u_char *nsd_verfstr; 174 struct timeval nsd_timestamp; /* timestamp from verifier */ 175 u_int32_t nsd_ttl; /* credential ttl (sec) */ 176 NFSKERBKEY_T nsd_key; /* Session key */ 177 }; 178 179 struct nfsd_cargs { 180 char *ncd_dirp; /* Mount dir path */ 181 uid_t ncd_authuid; /* Effective uid */ 182 int ncd_authtype; /* Type of authenticator */ 183 int ncd_authlen; /* Length of authenticator string */ 184 u_char *ncd_authstr; /* Authenticator string */ 185 int ncd_verflen; /* and the verifier */ 186 u_char *ncd_verfstr; 187 NFSKERBKEY_T ncd_key; /* Session key */ 188 }; 189 190 /* 191 * Stats structure 192 */ 193 struct nfsstats { 194 int attrcache_hits; 195 int attrcache_misses; 196 int lookupcache_hits; 197 int lookupcache_misses; 198 int direofcache_hits; 199 int direofcache_misses; 200 int biocache_reads; 201 int read_bios; 202 int read_physios; 203 int biocache_writes; 204 int write_bios; 205 int write_physios; 206 int biocache_readlinks; 207 int readlink_bios; 208 int biocache_readdirs; 209 int readdir_bios; 210 int rpccnt[NFS_NPROCS]; 211 int rpcretries; 212 int srvrpccnt[NFS_NPROCS]; 213 int srvrpc_errs; 214 int srv_errs; 215 int rpcrequests; 216 int rpctimeouts; 217 int rpcunexpected; 218 int rpcinvalid; 219 int srvcache_inproghits; 220 int srvcache_idemdonehits; 221 int srvcache_nonidemdonehits; 222 int srvcache_misses; 223 int srvnqnfs_leases; 224 int srvnqnfs_maxleases; 225 int srvnqnfs_getleases; 226 int srvvop_writes; 227 }; 228 229 /* 230 * Flags for nfssvc() system call. 231 */ 232 #define NFSSVC_BIOD 0x002 233 #define NFSSVC_NFSD 0x004 234 #define NFSSVC_ADDSOCK 0x008 235 #define NFSSVC_AUTHIN 0x010 236 #define NFSSVC_GOTAUTH 0x040 237 #define NFSSVC_AUTHINFAIL 0x080 238 #define NFSSVC_MNTD 0x100 239 240 /* 241 * fs.nfs sysctl(3) identifiers 242 */ 243 #define NFS_NFSSTATS 1 /* struct: struct nfsstats */ 244 #define NFS_IOTHREADS 2 /* number of io threads */ 245 #define NFS_MAXID 3 246 247 #define NFS_NAMES { \ 248 { 0, 0 }, \ 249 { "nfsstats", CTLTYPE_STRUCT }, \ 250 { "iothreads", CTLTYPE_INT }, \ 251 } 252 253 /* 254 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts. 255 * What should be in this set is open to debate, but I believe that since 256 * I/O system calls on ufs are never interrupted by signals the set should 257 * be minimal. My reasoning is that many current programs that use signals 258 * such as SIGALRM will not expect file I/O system calls to be interrupted 259 * by them and break. 260 */ 261 #ifdef _KERNEL 262 263 struct uio; struct buf; struct vattr; struct nameidata; /* XXX */ 264 265 /* 266 * Socket errors ignored for connectionless sockets?? 267 * For now, ignore them all 268 */ 269 #define NFSIGNORE_SOERROR(s, e) \ 270 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \ 271 ((s) & PR_CONNREQUIRED) == 0) 272 273 /* 274 * Nfs outstanding request list element 275 */ 276 struct nfsreq { 277 TAILQ_ENTRY(nfsreq) r_chain; 278 struct mbuf *r_mreq; 279 struct mbuf *r_mrep; 280 struct mbuf *r_md; 281 caddr_t r_dpos; 282 struct nfsmount *r_nmp; 283 struct vnode *r_vp; 284 u_int32_t r_xid; 285 int r_flags; /* flags on request, see below */ 286 int r_retry; /* max retransmission count */ 287 int r_rexmit; /* current retrans count */ 288 int r_timer; /* tick counter on reply */ 289 u_int32_t r_procnum; /* NFS procedure number */ 290 int r_rtt; /* RTT for rpc */ 291 struct proc *r_procp; /* Proc that did I/O system call */ 292 }; 293 294 /* 295 * Queue head for nfsreq's 296 */ 297 TAILQ_HEAD(, nfsreq) nfs_reqq; 298 299 /* Flag values for r_flags */ 300 #define R_TIMING 0x01 /* timing request (in mntp) */ 301 #define R_SENT 0x02 /* request has been sent */ 302 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */ 303 #define R_INTR 0x08 /* intr mnt, signal pending */ 304 #define R_SOCKERR 0x10 /* Fatal error on socket */ 305 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */ 306 #define R_MUSTRESEND 0x40 /* Must resend request */ 307 #define R_GETONEREP 0x80 /* Probe for one reply only */ 308 309 /* 310 * A list of nfssvc_sock structures is maintained with all the sockets 311 * that require service by the nfsd. 312 * The nfsuid structs hang off of the nfssvc_sock structs in both lru 313 * and uid hash lists. 314 */ 315 #ifndef NFS_UIDHASHSIZ 316 #define NFS_UIDHASHSIZ 29 /* Tune the size of nfssvc_sock with this */ 317 #endif 318 #define NUIDHASH(sock, uid) \ 319 (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ]) 320 #ifndef NFS_WDELAYHASHSIZ 321 #define NFS_WDELAYHASHSIZ 16 /* and with this */ 322 #endif 323 #define NWDELAYHASH(sock, f) \ 324 (&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ]) 325 #ifndef NFS_MUIDHASHSIZ 326 #define NFS_MUIDHASHSIZ 63 /* Tune the size of nfsmount with this */ 327 #endif 328 #define NMUIDHASH(nmp, uid) \ 329 (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ]) 330 #define NFSNOHASH(fhsum) \ 331 (&nfsnodehashtbl[(fhsum) & nfsnodehash]) 332 333 #ifndef NFS_DIRHASHSIZ 334 #define NFS_DIRHASHSIZ 64 335 #endif 336 #define NFSDIRHASH(np, off) \ 337 (&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)]) 338 339 /* 340 * Macros for storing/retrieving cookies into directory buffers. 341 */ 342 #define NFS_STASHCOOKIE(dp,off) \ 343 *((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t))) = off 344 #define NFS_GETCOOKIE(dp) \ 345 (*((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t)))) 346 #define NFS_STASHCOOKIE32(dp, val) \ 347 *((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \ 348 sizeof (int))) = val 349 #define NFS_GETCOOKIE32(dp) \ 350 (*((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \ 351 sizeof (int)))) 352 353 /* 354 * Flags passed to nfs_bioread(). 355 */ 356 #define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */ 357 358 /* 359 * Network address hash list element 360 */ 361 union nethostaddr { 362 u_int32_t had_inetaddr; 363 struct mbuf *had_nam; 364 }; 365 366 struct nfsuid { 367 TAILQ_ENTRY(nfsuid) nu_lru; /* LRU chain */ 368 LIST_ENTRY(nfsuid) nu_hash; /* Hash list */ 369 int nu_flag; /* Flags */ 370 union nethostaddr nu_haddr; /* Host addr. for dgram sockets */ 371 struct ucred nu_cr; /* Cred uid mapped to */ 372 int nu_expire; /* Expiry time (sec) */ 373 struct timeval nu_timestamp; /* Kerb. timestamp */ 374 u_int32_t nu_nickname; /* Nickname on server */ 375 NFSKERBKEY_T nu_key; /* and session key */ 376 }; 377 378 #define nu_inetaddr nu_haddr.had_inetaddr 379 #define nu_nam nu_haddr.had_nam 380 /* Bits for nu_flag */ 381 #define NU_INETADDR 0x1 382 #define NU_NAM 0x2 383 #ifdef INET6 384 #define NU_NETFAM(u) \ 385 (((u)->nu_flag & NU_INETADDR) ? \ 386 (((u)->nu_flag & NU_NAM) ? AF_INET6 : AF_INET) : AF_ISO) 387 #else 388 #define NU_NETFAM(u) (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO) 389 #endif 390 391 struct nfssvc_sock { 392 TAILQ_ENTRY(nfssvc_sock) ns_chain; /* List of all nfssvc_sock's */ 393 TAILQ_HEAD(, nfsuid) ns_uidlruhead; 394 struct file *ns_fp; 395 struct socket *ns_so; 396 struct mbuf *ns_nam; 397 struct mbuf *ns_raw; 398 struct mbuf *ns_rawend; 399 struct mbuf *ns_rec; 400 struct mbuf *ns_recend; 401 struct mbuf *ns_frag; 402 int ns_flag; 403 int ns_solock; 404 int ns_cc; 405 int ns_reclen; 406 int ns_numuids; 407 u_int32_t ns_sref; 408 LIST_HEAD(, nfsrv_descript) ns_tq; /* Write gather lists */ 409 LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ]; 410 LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; 411 }; 412 413 /* Bits for "ns_flag" */ 414 #define SLP_VALID 0x01 415 #define SLP_DOREC 0x02 416 #define SLP_NEEDQ 0x04 417 #define SLP_DISCONN 0x08 418 #define SLP_GETSTREAM 0x10 419 #define SLP_LASTFRAG 0x20 420 #define SLP_ALLFLAGS 0xff 421 422 TAILQ_HEAD(, nfssvc_sock) nfssvc_sockhead; 423 int nfssvc_sockhead_flag; 424 #define SLP_INIT 0x01 425 #define SLP_WANTINIT 0x02 426 427 /* 428 * One of these structures is allocated for each nfsd. 429 */ 430 struct nfsd { 431 TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */ 432 int nfsd_flag; /* NFSD_ flags */ 433 struct nfssvc_sock *nfsd_slp; /* Current socket */ 434 int nfsd_authlen; /* Authenticator len */ 435 u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */ 436 int nfsd_verflen; /* and the Verifier */ 437 u_char nfsd_verfstr[RPCVERF_MAXSIZ]; 438 struct proc *nfsd_procp; /* Proc ptr */ 439 struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */ 440 }; 441 442 /* Bits for "nfsd_flag" */ 443 #define NFSD_WAITING 0x01 444 #define NFSD_REQINPROG 0x02 445 #define NFSD_NEEDAUTH 0x04 446 #define NFSD_AUTHFAIL 0x08 447 448 /* 449 * This structure is used by the server for describing each request. 450 * Some fields are used only when write request gathering is performed. 451 */ 452 struct nfsrv_descript { 453 u_quad_t nd_time; /* Write deadline (usec) */ 454 off_t nd_off; /* Start byte offset */ 455 off_t nd_eoff; /* and end byte offset */ 456 LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */ 457 LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */ 458 LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */ 459 struct mbuf *nd_mrep; /* Request mbuf list */ 460 struct mbuf *nd_md; /* Current dissect mbuf */ 461 struct mbuf *nd_mreq; /* Reply mbuf list */ 462 struct mbuf *nd_nam; /* and socket addr */ 463 struct mbuf *nd_nam2; /* return socket addr */ 464 caddr_t nd_dpos; /* Current dissect pos */ 465 u_int32_t nd_procnum; /* RPC # */ 466 int nd_stable; /* storage type */ 467 int nd_flag; /* nd_flag */ 468 int nd_len; /* Length of this write */ 469 int nd_repstat; /* Reply status */ 470 u_int32_t nd_retxid; /* Reply xid */ 471 u_int32_t nd_duration; /* Lease duration */ 472 struct timeval nd_starttime; /* Time RPC initiated */ 473 fhandle_t nd_fh; /* File handle */ 474 struct ucred nd_cr; /* Credentials */ 475 }; 476 477 /* Bits for "nd_flag" */ 478 #define ND_READ LEASE_READ 479 #define ND_WRITE LEASE_WRITE 480 #define ND_CHECK 0x04 481 #define ND_LEASE (ND_READ | ND_WRITE | ND_CHECK) 482 #define ND_NFSV3 0x08 483 #define ND_NQNFS 0x10 484 #define ND_KERBNICK 0x20 485 #define ND_KERBFULL 0x40 486 #define ND_KERBAUTH (ND_KERBNICK | ND_KERBFULL) 487 488 TAILQ_HEAD(, nfsd) nfsd_head; 489 int nfsd_head_flag; 490 #define NFSD_CHECKSLP 0x01 491 492 /* 493 * These macros compare nfsrv_descript structures. 494 */ 495 #define NFSW_CONTIG(o, n) \ 496 ((o)->nd_eoff >= (n)->nd_off && \ 497 !memcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH)) 498 499 #define NFSW_SAMECRED(o, n) \ 500 (((o)->nd_flag & ND_KERBAUTH) == ((n)->nd_flag & ND_KERBAUTH) && \ 501 !memcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \ 502 sizeof (struct ucred))) 503 504 /* 505 * Defines for WebNFS 506 */ 507 508 #define WEBNFS_ESC_CHAR '%' 509 #define WEBNFS_SPECCHAR_START 0x80 510 511 #define WEBNFS_NATIVE_CHAR 0x80 512 /* 513 * .. 514 * Possibly more here in the future. 515 */ 516 517 /* 518 * Macro for converting escape characters in WebNFS pathnames. 519 * Should really be in libkern. 520 */ 521 522 #define HEXTOC(c) \ 523 ((c) >= 'a' ? ((c) - ('a' - 10)) : \ 524 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0'))) 525 #define HEXSTRTOI(p) \ 526 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1])) 527 #endif /* _KERNEL */ 528 529 #endif /* _NFS_NFS_H */ 530