nfs.h revision 1.32
1 /* $NetBSD: nfs.h,v 1.32 2001/11/29 21:22:50 christos 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 65 /* 66 * These can be overridden through <machine/param.h>, included via 67 * <sys/param.h>. This means that <sys/param.h> should always be 68 * included before this file. 69 */ 70 #ifndef NFS_WSIZE 71 #define NFS_WSIZE 8192 /* Def. write data size */ 72 #endif 73 #ifndef NFS_RSIZE 74 #define NFS_RSIZE 8192 /* Def. read data size */ 75 #endif 76 #ifndef NFS_READDIRSIZE 77 #define NFS_READDIRSIZE 8192 /* Def. readdir size */ 78 #endif 79 80 #define NFS_DEFRAHEAD 2 /* Def. read ahead # blocks */ 81 #define NFS_MAXRAHEAD 4 /* Max. read ahead # blocks */ 82 #define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */ 83 #define NFS_MAXASYNCDAEMON 20 /* Max. number async_daemons runable */ 84 #ifdef _KERNEL 85 extern int nfs_niothreads; /* Number of async_daemons desired */ 86 #ifndef NFS_DEFAULT_NIOTHREADS 87 #define NFS_DEFAULT_NIOTHREADS 4 88 #endif 89 #endif 90 #define NFS_MAXGATHERDELAY 100 /* Max. write gather delay (msec) */ 91 #ifndef NFS_GATHERDELAY 92 #define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */ 93 #endif 94 95 /* 96 * NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for 97 * NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount 98 * of data in those buffers, and thus the minimum amount of data 99 * that you can request. NFS_DIRFRAGSIZ should be no smaller than 100 * DIRBLKSIZ. 101 */ 102 103 #define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */ 104 #define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */ 105 106 /* 107 * Maximum number of directory entries cached per NFS node, to avoid 108 * having this grow without bounds on very large directories. The 109 * minimum size to get reasonable performance for emulated binaries 110 * is the maximum number of entries that fits in NFS_DIRBLKSIZ. 111 * For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36. 112 */ 113 #define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14) 114 115 /* 116 * Oddballs 117 */ 118 #define NMOD(a) ((a) % nfs_asyncdaemons) 119 #define NFS_CMPFH(n, f, s) \ 120 ((n)->n_fhsize == (s) && !memcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s))) 121 #ifdef NFS_V2_ONLY 122 #define NFS_ISV3(v) (0) 123 #else 124 #define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3) 125 #endif 126 #define NFS_SRVMAXDATA(n) \ 127 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \ 128 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA) 129 130 /* 131 * The VA_EXCLUSIVE flag should be added for va_vaflags and set for an 132 * exclusive create. 133 */ 134 #ifndef VA_EXCLUSIVE 135 #define VA_EXCLUSIVE 0 136 #endif 137 138 /* 139 * Use the vm_page flag reserved for pager use to indicate pages 140 * which have been written to the server but not yet committed. 141 */ 142 #define PG_NEEDCOMMIT PG_PAGER1 143 144 /* 145 * The IO_METASYNC flag should be implemented for local file systems. 146 * (Until then, it is nothin at all.) 147 */ 148 #ifndef IO_METASYNC 149 #define IO_METASYNC 0 150 #endif 151 152 /* 153 * Set the attribute timeout based on how recently the file has been modified. 154 */ 155 #define NFS_ATTRTIMEO(np) \ 156 ((((np)->n_flag & NMODIFIED) || \ 157 (time.tv_sec - (np)->n_mtime) / 10 < NFS_MINATTRTIMO) ? NFS_MINATTRTIMO : \ 158 ((time.tv_sec - (np)->n_mtime) / 10 > NFS_MAXATTRTIMO ? NFS_MAXATTRTIMO : \ 159 (time.tv_sec - (np)->n_mtime) / 10)) 160 161 /* 162 * Expected allocation sizes for major data structures. If the actual size 163 * of the structure exceeds these sizes, then malloc() will be allocating 164 * almost twice the memory required. This is used in nfs_init() to warn 165 * the sysadmin that the size of a structure should be reduced. 166 * (These sizes are always a power of 2. If the kernel malloc() changes 167 * to one that does not allocate space in powers of 2 size, then this all 168 * becomes bunk!) 169 */ 170 #define NFS_NODEALLOC 256 171 #define NFS_MNTALLOC 512 172 #define NFS_SVCALLOC 256 173 #define NFS_UIDALLOC 128 174 175 /* 176 * Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs 177 * should ever try and use it. 178 */ 179 struct nfsd_args { 180 int sock; /* Socket to serve */ 181 caddr_t name; /* Client addr for connection based sockets */ 182 int namelen; /* Length of name */ 183 }; 184 185 struct nfsd_srvargs { 186 struct nfsd *nsd_nfsd; /* Pointer to in kernel nfsd struct */ 187 uid_t nsd_uid; /* Effective uid mapped to cred */ 188 u_int32_t nsd_haddr; /* Ip address of client */ 189 struct uucred nsd_cr; /* Cred. uid maps to */ 190 int nsd_authlen; /* Length of auth string (ret) */ 191 u_char *nsd_authstr; /* Auth string (ret) */ 192 int nsd_verflen; /* and the verfier */ 193 u_char *nsd_verfstr; 194 struct timeval nsd_timestamp; /* timestamp from verifier */ 195 u_int32_t nsd_ttl; /* credential ttl (sec) */ 196 NFSKERBKEY_T nsd_key; /* Session key */ 197 }; 198 199 struct nfsd_cargs { 200 char *ncd_dirp; /* Mount dir path */ 201 uid_t ncd_authuid; /* Effective uid */ 202 int ncd_authtype; /* Type of authenticator */ 203 u_int ncd_authlen; /* Length of authenticator string */ 204 u_char *ncd_authstr; /* Authenticator string */ 205 u_int ncd_verflen; /* and the verifier */ 206 u_char *ncd_verfstr; 207 NFSKERBKEY_T ncd_key; /* Session key */ 208 }; 209 210 /* 211 * Stats structure 212 */ 213 struct nfsstats { 214 int attrcache_hits; 215 int attrcache_misses; 216 int lookupcache_hits; 217 int lookupcache_misses; 218 int direofcache_hits; 219 int direofcache_misses; 220 int biocache_reads; 221 int read_bios; 222 int read_physios; 223 int biocache_writes; 224 int write_bios; 225 int write_physios; 226 int biocache_readlinks; 227 int readlink_bios; 228 int biocache_readdirs; 229 int readdir_bios; 230 int rpccnt[NFS_NPROCS]; 231 int rpcretries; 232 int srvrpccnt[NFS_NPROCS]; 233 int srvrpc_errs; 234 int srv_errs; 235 int rpcrequests; 236 int rpctimeouts; 237 int rpcunexpected; 238 int rpcinvalid; 239 int srvcache_inproghits; 240 int srvcache_idemdonehits; 241 int srvcache_nonidemdonehits; 242 int srvcache_misses; 243 int srvnqnfs_leases; 244 int srvnqnfs_maxleases; 245 int srvnqnfs_getleases; 246 int srvvop_writes; 247 }; 248 249 /* 250 * Flags for nfssvc() system call. 251 */ 252 #define NFSSVC_BIOD 0x002 253 #define NFSSVC_NFSD 0x004 254 #define NFSSVC_ADDSOCK 0x008 255 #define NFSSVC_AUTHIN 0x010 256 #define NFSSVC_GOTAUTH 0x040 257 #define NFSSVC_AUTHINFAIL 0x080 258 #define NFSSVC_MNTD 0x100 259 260 /* 261 * fs.nfs sysctl(3) identifiers 262 */ 263 #define NFS_NFSSTATS 1 /* struct: struct nfsstats */ 264 #define NFS_IOTHREADS 2 /* number of io threads */ 265 #define NFS_MAXID 3 266 267 #define NFS_NAMES { \ 268 { 0, 0 }, \ 269 { "nfsstats", CTLTYPE_STRUCT }, \ 270 { "iothreads", CTLTYPE_INT }, \ 271 } 272 273 /* 274 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts. 275 * What should be in this set is open to debate, but I believe that since 276 * I/O system calls on ufs are never interrupted by signals the set should 277 * be minimal. My reasoning is that many current programs that use signals 278 * such as SIGALRM will not expect file I/O system calls to be interrupted 279 * by them and break. 280 */ 281 #ifdef _KERNEL 282 283 struct uio; struct buf; struct vattr; struct nameidata; /* XXX */ 284 285 /* 286 * Socket errors ignored for connectionless sockets?? 287 * For now, ignore them all 288 */ 289 #define NFSIGNORE_SOERROR(s, e) \ 290 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \ 291 ((s) & PR_CONNREQUIRED) == 0) 292 293 /* 294 * Nfs outstanding request list element 295 */ 296 struct nfsreq { 297 TAILQ_ENTRY(nfsreq) r_chain; 298 struct mbuf *r_mreq; 299 struct mbuf *r_mrep; 300 struct mbuf *r_md; 301 caddr_t r_dpos; 302 struct nfsmount *r_nmp; 303 struct vnode *r_vp; 304 u_int32_t r_xid; 305 int r_flags; /* flags on request, see below */ 306 int r_retry; /* max retransmission count */ 307 int r_rexmit; /* current retrans count */ 308 int r_timer; /* tick counter on reply */ 309 u_int32_t r_procnum; /* NFS procedure number */ 310 int r_rtt; /* RTT for rpc */ 311 struct proc *r_procp; /* Proc that did I/O system call */ 312 }; 313 314 /* 315 * Queue head for nfsreq's 316 */ 317 TAILQ_HEAD(, nfsreq) nfs_reqq; 318 319 /* Flag values for r_flags */ 320 #define R_TIMING 0x01 /* timing request (in mntp) */ 321 #define R_SENT 0x02 /* request has been sent */ 322 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */ 323 #define R_INTR 0x08 /* intr mnt, signal pending */ 324 #define R_SOCKERR 0x10 /* Fatal error on socket */ 325 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */ 326 #define R_MUSTRESEND 0x40 /* Must resend request */ 327 #define R_GETONEREP 0x80 /* Probe for one reply only */ 328 329 /* 330 * A list of nfssvc_sock structures is maintained with all the sockets 331 * that require service by the nfsd. 332 * The nfsuid structs hang off of the nfssvc_sock structs in both lru 333 * and uid hash lists. 334 */ 335 #ifndef NFS_UIDHASHSIZ 336 #define NFS_UIDHASHSIZ 29 /* Tune the size of nfssvc_sock with this */ 337 #endif 338 #define NUIDHASH(sock, uid) \ 339 (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ]) 340 #ifndef NFS_WDELAYHASHSIZ 341 #define NFS_WDELAYHASHSIZ 16 /* and with this */ 342 #endif 343 #define NWDELAYHASH(sock, f) \ 344 (&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ]) 345 #ifndef NFS_MUIDHASHSIZ 346 #define NFS_MUIDHASHSIZ 63 /* Tune the size of nfsmount with this */ 347 #endif 348 #define NMUIDHASH(nmp, uid) \ 349 (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ]) 350 #define NFSNOHASH(fhsum) ((fhsum) & nfsnodehash) 351 352 #ifndef NFS_DIRHASHSIZ 353 #define NFS_DIRHASHSIZ 64 354 #endif 355 #define NFSDIRHASH(np, off) \ 356 (&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)]) 357 358 /* 359 * Macros for storing/retrieving cookies into directory buffers. 360 */ 361 #define NFS_STASHCOOKIE(dp,off) \ 362 *((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t))) = off 363 #define NFS_GETCOOKIE(dp) \ 364 (*((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t)))) 365 #define NFS_STASHCOOKIE32(dp, val) \ 366 *((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \ 367 sizeof (int))) = val 368 #define NFS_GETCOOKIE32(dp) \ 369 (*((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \ 370 sizeof (int)))) 371 372 /* 373 * Flags passed to nfs_bioread(). 374 */ 375 #define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */ 376 377 /* 378 * Network address hash list element 379 */ 380 union nethostaddr { 381 u_int32_t had_inetaddr; 382 struct mbuf *had_nam; 383 }; 384 385 struct nfsuid { 386 TAILQ_ENTRY(nfsuid) nu_lru; /* LRU chain */ 387 LIST_ENTRY(nfsuid) nu_hash; /* Hash list */ 388 int nu_flag; /* Flags */ 389 union nethostaddr nu_haddr; /* Host addr. for dgram sockets */ 390 struct ucred nu_cr; /* Cred uid mapped to */ 391 int nu_expire; /* Expiry time (sec) */ 392 struct timeval nu_timestamp; /* Kerb. timestamp */ 393 u_int32_t nu_nickname; /* Nickname on server */ 394 NFSKERBKEY_T nu_key; /* and session key */ 395 }; 396 397 #define nu_inetaddr nu_haddr.had_inetaddr 398 #define nu_nam nu_haddr.had_nam 399 /* Bits for nu_flag */ 400 #define NU_INETADDR 0x1 401 #define NU_NAM 0x2 402 #ifdef INET6 403 #define NU_NETFAM(u) \ 404 (((u)->nu_flag & NU_INETADDR) ? \ 405 (((u)->nu_flag & NU_NAM) ? AF_INET6 : AF_INET) : AF_ISO) 406 #else 407 #define NU_NETFAM(u) (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO) 408 #endif 409 410 struct nfssvc_sock { 411 TAILQ_ENTRY(nfssvc_sock) ns_chain; /* List of all nfssvc_sock's */ 412 TAILQ_HEAD(, nfsuid) ns_uidlruhead; 413 struct file *ns_fp; 414 struct socket *ns_so; 415 struct mbuf *ns_nam; 416 struct mbuf *ns_raw; 417 struct mbuf *ns_rawend; 418 struct mbuf *ns_rec; 419 struct mbuf *ns_recend; 420 struct mbuf *ns_frag; 421 int ns_flag; 422 int ns_solock; 423 int ns_cc; 424 int ns_reclen; 425 int ns_numuids; 426 u_int32_t ns_sref; 427 LIST_HEAD(, nfsrv_descript) ns_tq; /* Write gather lists */ 428 LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ]; 429 LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; 430 }; 431 432 /* Bits for "ns_flag" */ 433 #define SLP_VALID 0x01 434 #define SLP_DOREC 0x02 435 #define SLP_NEEDQ 0x04 436 #define SLP_DISCONN 0x08 437 #define SLP_GETSTREAM 0x10 438 #define SLP_LASTFRAG 0x20 439 #define SLP_ALLFLAGS 0xff 440 441 TAILQ_HEAD(, nfssvc_sock) nfssvc_sockhead; 442 int nfssvc_sockhead_flag; 443 #define SLP_INIT 0x01 444 #define SLP_WANTINIT 0x02 445 446 /* 447 * One of these structures is allocated for each nfsd. 448 */ 449 struct nfsd { 450 TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */ 451 int nfsd_flag; /* NFSD_ flags */ 452 struct nfssvc_sock *nfsd_slp; /* Current socket */ 453 int nfsd_authlen; /* Authenticator len */ 454 u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */ 455 int nfsd_verflen; /* and the Verifier */ 456 u_char nfsd_verfstr[RPCVERF_MAXSIZ]; 457 struct proc *nfsd_procp; /* Proc ptr */ 458 struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */ 459 }; 460 461 /* Bits for "nfsd_flag" */ 462 #define NFSD_WAITING 0x01 463 #define NFSD_REQINPROG 0x02 464 #define NFSD_NEEDAUTH 0x04 465 #define NFSD_AUTHFAIL 0x08 466 467 /* 468 * This structure is used by the server for describing each request. 469 * Some fields are used only when write request gathering is performed. 470 */ 471 struct nfsrv_descript { 472 u_quad_t nd_time; /* Write deadline (usec) */ 473 off_t nd_off; /* Start byte offset */ 474 off_t nd_eoff; /* and end byte offset */ 475 LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */ 476 LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */ 477 LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */ 478 struct mbuf *nd_mrep; /* Request mbuf list */ 479 struct mbuf *nd_md; /* Current dissect mbuf */ 480 struct mbuf *nd_mreq; /* Reply mbuf list */ 481 struct mbuf *nd_nam; /* and socket addr */ 482 struct mbuf *nd_nam2; /* return socket addr */ 483 caddr_t nd_dpos; /* Current dissect pos */ 484 u_int32_t nd_procnum; /* RPC # */ 485 int nd_stable; /* storage type */ 486 int nd_flag; /* nd_flag */ 487 int nd_len; /* Length of this write */ 488 int nd_repstat; /* Reply status */ 489 u_int32_t nd_retxid; /* Reply xid */ 490 u_int32_t nd_duration; /* Lease duration */ 491 struct timeval nd_starttime; /* Time RPC initiated */ 492 fhandle_t nd_fh; /* File handle */ 493 struct ucred nd_cr; /* Credentials */ 494 }; 495 496 /* Bits for "nd_flag" */ 497 #define ND_READ LEASE_READ 498 #define ND_WRITE LEASE_WRITE 499 #define ND_CHECK 0x04 500 #define ND_LEASE (ND_READ | ND_WRITE | ND_CHECK) 501 #define ND_NFSV3 0x08 502 #define ND_NQNFS 0x10 503 #define ND_KERBNICK 0x20 504 #define ND_KERBFULL 0x40 505 #define ND_KERBAUTH (ND_KERBNICK | ND_KERBFULL) 506 507 TAILQ_HEAD(, nfsd) nfsd_head; 508 int nfsd_head_flag; 509 #define NFSD_CHECKSLP 0x01 510 511 /* 512 * These macros compare nfsrv_descript structures. 513 */ 514 #define NFSW_CONTIG(o, n) \ 515 ((o)->nd_eoff >= (n)->nd_off && \ 516 !memcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH)) 517 518 #define NFSW_SAMECRED(o, n) \ 519 (((o)->nd_flag & ND_KERBAUTH) == ((n)->nd_flag & ND_KERBAUTH) && \ 520 !memcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \ 521 sizeof (struct ucred))) 522 523 /* 524 * Defines for WebNFS 525 */ 526 527 #define WEBNFS_ESC_CHAR '%' 528 #define WEBNFS_SPECCHAR_START 0x80 529 530 #define WEBNFS_NATIVE_CHAR 0x80 531 /* 532 * .. 533 * Possibly more here in the future. 534 */ 535 536 /* 537 * Macro for converting escape characters in WebNFS pathnames. 538 * Should really be in libkern. 539 */ 540 541 #define HEXTOC(c) \ 542 ((c) >= 'a' ? ((c) - ('a' - 10)) : \ 543 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0'))) 544 #define HEXSTRTOI(p) \ 545 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1])) 546 #endif /* _KERNEL */ 547 548 #endif /* _NFS_NFS_H */ 549
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