nfs.h revision 1.25
1 /* $NetBSD: nfs.h,v 1.25 2000/11/27 08:39:48 chs 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 32768 /* Def. write data size */ 65 #define NFS_RSIZE 32768 /* Def. read data size */ 66 #define NFS_READDIRSIZE 8192 /* Def. readdir size */ 67 #define NFS_DEFRAHEAD 2 /* 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 #if 1 88 /* 89 * XXXUBC temp hack because of the removal of b_validend. 90 * eventually we'll store NFS VDIR data in the page cache as well, 91 * we'll fix this at that point. 92 */ 93 #define NFS_DIRBLKSIZ PAGE_SIZE 94 #define NFS_DIRFRAGSIZ PAGE_SIZE 95 #else 96 #define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */ 97 #define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */ 98 #endif 99 100 /* 101 * Maximum number of directory entries cached per NFS node, to avoid 102 * having this grow without bounds on very large directories. The 103 * minimum size to get reasonable performance for emulated binaries 104 * is the maximum number of entries that fits in NFS_DIRBLKSIZ. 105 * For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36. 106 */ 107 #define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14) 108 109 /* 110 * Oddballs 111 */ 112 #define NMOD(a) ((a) % nfs_asyncdaemons) 113 #define NFS_CMPFH(n, f, s) \ 114 ((n)->n_fhsize == (s) && !memcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s))) 115 #ifdef NFS_V2_ONLY 116 #define NFS_ISV3(v) (0) 117 #else 118 #define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3) 119 #endif 120 #define NFS_SRVMAXDATA(n) \ 121 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \ 122 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA) 123 124 /* 125 * The VA_EXCLUSIVE flag should be added for va_vaflags and set for an 126 * exclusive create. 127 */ 128 #ifndef VA_EXCLUSIVE 129 #define VA_EXCLUSIVE 0 130 #endif 131 132 /* 133 * Use the vm_page flag reserved for pager use to indicate pages 134 * which have been written to the server but not yet committed. 135 */ 136 #define PG_NEEDCOMMIT PG_PAGER1 137 138 /* 139 * The IO_METASYNC flag should be implemented for local file systems. 140 * (Until then, it is nothin at all.) 141 */ 142 #ifndef IO_METASYNC 143 #define IO_METASYNC 0 144 #endif 145 146 /* 147 * Set the attribute timeout based on how recently the file has been modified. 148 */ 149 #define NFS_ATTRTIMEO(np) \ 150 ((((np)->n_flag & NMODIFIED) || \ 151 (time.tv_sec - (np)->n_mtime) / 10 < NFS_MINATTRTIMO) ? NFS_MINATTRTIMO : \ 152 ((time.tv_sec - (np)->n_mtime) / 10 > NFS_MAXATTRTIMO ? NFS_MAXATTRTIMO : \ 153 (time.tv_sec - (np)->n_mtime) / 10)) 154 155 /* 156 * Expected allocation sizes for major data structures. If the actual size 157 * of the structure exceeds these sizes, then malloc() will be allocating 158 * almost twice the memory required. This is used in nfs_init() to warn 159 * the sysadmin that the size of a structure should be reduced. 160 * (These sizes are always a power of 2. If the kernel malloc() changes 161 * to one that does not allocate space in powers of 2 size, then this all 162 * becomes bunk!) 163 */ 164 #define NFS_NODEALLOC 256 165 #define NFS_MNTALLOC 512 166 #define NFS_SVCALLOC 256 167 #define NFS_UIDALLOC 128 168 169 /* 170 * Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs 171 * should ever try and use it. 172 */ 173 struct nfsd_args { 174 int sock; /* Socket to serve */ 175 caddr_t name; /* Client addr for connection based sockets */ 176 int namelen; /* Length of name */ 177 }; 178 179 struct nfsd_srvargs { 180 struct nfsd *nsd_nfsd; /* Pointer to in kernel nfsd struct */ 181 uid_t nsd_uid; /* Effective uid mapped to cred */ 182 u_int32_t nsd_haddr; /* Ip address of client */ 183 struct ucred nsd_cr; /* Cred. uid maps to */ 184 int nsd_authlen; /* Length of auth string (ret) */ 185 u_char *nsd_authstr; /* Auth string (ret) */ 186 int nsd_verflen; /* and the verfier */ 187 u_char *nsd_verfstr; 188 struct timeval nsd_timestamp; /* timestamp from verifier */ 189 u_int32_t nsd_ttl; /* credential ttl (sec) */ 190 NFSKERBKEY_T nsd_key; /* Session key */ 191 }; 192 193 struct nfsd_cargs { 194 char *ncd_dirp; /* Mount dir path */ 195 uid_t ncd_authuid; /* Effective uid */ 196 int ncd_authtype; /* Type of authenticator */ 197 int ncd_authlen; /* Length of authenticator string */ 198 u_char *ncd_authstr; /* Authenticator string */ 199 int ncd_verflen; /* and the verifier */ 200 u_char *ncd_verfstr; 201 NFSKERBKEY_T ncd_key; /* Session key */ 202 }; 203 204 /* 205 * Stats structure 206 */ 207 struct nfsstats { 208 int attrcache_hits; 209 int attrcache_misses; 210 int lookupcache_hits; 211 int lookupcache_misses; 212 int direofcache_hits; 213 int direofcache_misses; 214 int biocache_reads; 215 int read_bios; 216 int read_physios; 217 int biocache_writes; 218 int write_bios; 219 int write_physios; 220 int biocache_readlinks; 221 int readlink_bios; 222 int biocache_readdirs; 223 int readdir_bios; 224 int rpccnt[NFS_NPROCS]; 225 int rpcretries; 226 int srvrpccnt[NFS_NPROCS]; 227 int srvrpc_errs; 228 int srv_errs; 229 int rpcrequests; 230 int rpctimeouts; 231 int rpcunexpected; 232 int rpcinvalid; 233 int srvcache_inproghits; 234 int srvcache_idemdonehits; 235 int srvcache_nonidemdonehits; 236 int srvcache_misses; 237 int srvnqnfs_leases; 238 int srvnqnfs_maxleases; 239 int srvnqnfs_getleases; 240 int srvvop_writes; 241 }; 242 243 /* 244 * Flags for nfssvc() system call. 245 */ 246 #define NFSSVC_BIOD 0x002 247 #define NFSSVC_NFSD 0x004 248 #define NFSSVC_ADDSOCK 0x008 249 #define NFSSVC_AUTHIN 0x010 250 #define NFSSVC_GOTAUTH 0x040 251 #define NFSSVC_AUTHINFAIL 0x080 252 #define NFSSVC_MNTD 0x100 253 254 /* 255 * fs.nfs sysctl(3) identifiers 256 */ 257 #define NFS_NFSSTATS 1 /* struct: struct nfsstats */ 258 #define NFS_IOTHREADS 2 /* number of io threads */ 259 #define NFS_MAXID 3 260 261 #define NFS_NAMES { \ 262 { 0, 0 }, \ 263 { "nfsstats", CTLTYPE_STRUCT }, \ 264 { "iothreads", CTLTYPE_INT }, \ 265 } 266 267 /* 268 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts. 269 * What should be in this set is open to debate, but I believe that since 270 * I/O system calls on ufs are never interrupted by signals the set should 271 * be minimal. My reasoning is that many current programs that use signals 272 * such as SIGALRM will not expect file I/O system calls to be interrupted 273 * by them and break. 274 */ 275 #ifdef _KERNEL 276 277 struct uio; struct buf; struct vattr; struct nameidata; /* XXX */ 278 279 /* 280 * Socket errors ignored for connectionless sockets?? 281 * For now, ignore them all 282 */ 283 #define NFSIGNORE_SOERROR(s, e) \ 284 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \ 285 ((s) & PR_CONNREQUIRED) == 0) 286 287 /* 288 * Nfs outstanding request list element 289 */ 290 struct nfsreq { 291 TAILQ_ENTRY(nfsreq) r_chain; 292 struct mbuf *r_mreq; 293 struct mbuf *r_mrep; 294 struct mbuf *r_md; 295 caddr_t r_dpos; 296 struct nfsmount *r_nmp; 297 struct vnode *r_vp; 298 u_int32_t r_xid; 299 int r_flags; /* flags on request, see below */ 300 int r_retry; /* max retransmission count */ 301 int r_rexmit; /* current retrans count */ 302 int r_timer; /* tick counter on reply */ 303 u_int32_t r_procnum; /* NFS procedure number */ 304 int r_rtt; /* RTT for rpc */ 305 struct proc *r_procp; /* Proc that did I/O system call */ 306 }; 307 308 /* 309 * Queue head for nfsreq's 310 */ 311 TAILQ_HEAD(, nfsreq) nfs_reqq; 312 313 /* Flag values for r_flags */ 314 #define R_TIMING 0x01 /* timing request (in mntp) */ 315 #define R_SENT 0x02 /* request has been sent */ 316 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */ 317 #define R_INTR 0x08 /* intr mnt, signal pending */ 318 #define R_SOCKERR 0x10 /* Fatal error on socket */ 319 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */ 320 #define R_MUSTRESEND 0x40 /* Must resend request */ 321 #define R_GETONEREP 0x80 /* Probe for one reply only */ 322 323 /* 324 * A list of nfssvc_sock structures is maintained with all the sockets 325 * that require service by the nfsd. 326 * The nfsuid structs hang off of the nfssvc_sock structs in both lru 327 * and uid hash lists. 328 */ 329 #ifndef NFS_UIDHASHSIZ 330 #define NFS_UIDHASHSIZ 29 /* Tune the size of nfssvc_sock with this */ 331 #endif 332 #define NUIDHASH(sock, uid) \ 333 (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ]) 334 #ifndef NFS_WDELAYHASHSIZ 335 #define NFS_WDELAYHASHSIZ 16 /* and with this */ 336 #endif 337 #define NWDELAYHASH(sock, f) \ 338 (&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ]) 339 #ifndef NFS_MUIDHASHSIZ 340 #define NFS_MUIDHASHSIZ 63 /* Tune the size of nfsmount with this */ 341 #endif 342 #define NMUIDHASH(nmp, uid) \ 343 (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ]) 344 #define NFSNOHASH(fhsum) \ 345 (&nfsnodehashtbl[(fhsum) & nfsnodehash]) 346 347 #ifndef NFS_DIRHASHSIZ 348 #define NFS_DIRHASHSIZ 64 349 #endif 350 #define NFSDIRHASH(np, off) \ 351 (&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)]) 352 353 /* 354 * Macros for storing/retrieving cookies into directory buffers. 355 */ 356 #define NFS_STASHCOOKIE(dp,off) \ 357 *((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t))) = off 358 #define NFS_GETCOOKIE(dp) \ 359 (*((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t)))) 360 #define NFS_STASHCOOKIE32(dp, val) \ 361 *((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \ 362 sizeof (int))) = val 363 #define NFS_GETCOOKIE32(dp) \ 364 (*((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \ 365 sizeof (int)))) 366 367 /* 368 * Flags passed to nfs_bioread(). 369 */ 370 #define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */ 371 372 /* 373 * Network address hash list element 374 */ 375 union nethostaddr { 376 u_int32_t had_inetaddr; 377 struct mbuf *had_nam; 378 }; 379 380 struct nfsuid { 381 TAILQ_ENTRY(nfsuid) nu_lru; /* LRU chain */ 382 LIST_ENTRY(nfsuid) nu_hash; /* Hash list */ 383 int nu_flag; /* Flags */ 384 union nethostaddr nu_haddr; /* Host addr. for dgram sockets */ 385 struct ucred nu_cr; /* Cred uid mapped to */ 386 int nu_expire; /* Expiry time (sec) */ 387 struct timeval nu_timestamp; /* Kerb. timestamp */ 388 u_int32_t nu_nickname; /* Nickname on server */ 389 NFSKERBKEY_T nu_key; /* and session key */ 390 }; 391 392 #define nu_inetaddr nu_haddr.had_inetaddr 393 #define nu_nam nu_haddr.had_nam 394 /* Bits for nu_flag */ 395 #define NU_INETADDR 0x1 396 #define NU_NAM 0x2 397 #ifdef INET6 398 #define NU_NETFAM(u) \ 399 (((u)->nu_flag & NU_INETADDR) ? \ 400 (((u)->nu_flag & NU_NAM) ? AF_INET6 : AF_INET) : AF_ISO) 401 #else 402 #define NU_NETFAM(u) (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO) 403 #endif 404 405 struct nfssvc_sock { 406 TAILQ_ENTRY(nfssvc_sock) ns_chain; /* List of all nfssvc_sock's */ 407 TAILQ_HEAD(, nfsuid) ns_uidlruhead; 408 struct file *ns_fp; 409 struct socket *ns_so; 410 struct mbuf *ns_nam; 411 struct mbuf *ns_raw; 412 struct mbuf *ns_rawend; 413 struct mbuf *ns_rec; 414 struct mbuf *ns_recend; 415 struct mbuf *ns_frag; 416 int ns_flag; 417 int ns_solock; 418 int ns_cc; 419 int ns_reclen; 420 int ns_numuids; 421 u_int32_t ns_sref; 422 LIST_HEAD(, nfsrv_descript) ns_tq; /* Write gather lists */ 423 LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ]; 424 LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; 425 }; 426 427 /* Bits for "ns_flag" */ 428 #define SLP_VALID 0x01 429 #define SLP_DOREC 0x02 430 #define SLP_NEEDQ 0x04 431 #define SLP_DISCONN 0x08 432 #define SLP_GETSTREAM 0x10 433 #define SLP_LASTFRAG 0x20 434 #define SLP_ALLFLAGS 0xff 435 436 TAILQ_HEAD(, nfssvc_sock) nfssvc_sockhead; 437 int nfssvc_sockhead_flag; 438 #define SLP_INIT 0x01 439 #define SLP_WANTINIT 0x02 440 441 /* 442 * One of these structures is allocated for each nfsd. 443 */ 444 struct nfsd { 445 TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */ 446 int nfsd_flag; /* NFSD_ flags */ 447 struct nfssvc_sock *nfsd_slp; /* Current socket */ 448 int nfsd_authlen; /* Authenticator len */ 449 u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */ 450 int nfsd_verflen; /* and the Verifier */ 451 u_char nfsd_verfstr[RPCVERF_MAXSIZ]; 452 struct proc *nfsd_procp; /* Proc ptr */ 453 struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */ 454 }; 455 456 /* Bits for "nfsd_flag" */ 457 #define NFSD_WAITING 0x01 458 #define NFSD_REQINPROG 0x02 459 #define NFSD_NEEDAUTH 0x04 460 #define NFSD_AUTHFAIL 0x08 461 462 /* 463 * This structure is used by the server for describing each request. 464 * Some fields are used only when write request gathering is performed. 465 */ 466 struct nfsrv_descript { 467 u_quad_t nd_time; /* Write deadline (usec) */ 468 off_t nd_off; /* Start byte offset */ 469 off_t nd_eoff; /* and end byte offset */ 470 LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */ 471 LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */ 472 LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */ 473 struct mbuf *nd_mrep; /* Request mbuf list */ 474 struct mbuf *nd_md; /* Current dissect mbuf */ 475 struct mbuf *nd_mreq; /* Reply mbuf list */ 476 struct mbuf *nd_nam; /* and socket addr */ 477 struct mbuf *nd_nam2; /* return socket addr */ 478 caddr_t nd_dpos; /* Current dissect pos */ 479 u_int32_t nd_procnum; /* RPC # */ 480 int nd_stable; /* storage type */ 481 int nd_flag; /* nd_flag */ 482 int nd_len; /* Length of this write */ 483 int nd_repstat; /* Reply status */ 484 u_int32_t nd_retxid; /* Reply xid */ 485 u_int32_t nd_duration; /* Lease duration */ 486 struct timeval nd_starttime; /* Time RPC initiated */ 487 fhandle_t nd_fh; /* File handle */ 488 struct ucred nd_cr; /* Credentials */ 489 }; 490 491 /* Bits for "nd_flag" */ 492 #define ND_READ LEASE_READ 493 #define ND_WRITE LEASE_WRITE 494 #define ND_CHECK 0x04 495 #define ND_LEASE (ND_READ | ND_WRITE | ND_CHECK) 496 #define ND_NFSV3 0x08 497 #define ND_NQNFS 0x10 498 #define ND_KERBNICK 0x20 499 #define ND_KERBFULL 0x40 500 #define ND_KERBAUTH (ND_KERBNICK | ND_KERBFULL) 501 502 TAILQ_HEAD(, nfsd) nfsd_head; 503 int nfsd_head_flag; 504 #define NFSD_CHECKSLP 0x01 505 506 /* 507 * These macros compare nfsrv_descript structures. 508 */ 509 #define NFSW_CONTIG(o, n) \ 510 ((o)->nd_eoff >= (n)->nd_off && \ 511 !memcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH)) 512 513 #define NFSW_SAMECRED(o, n) \ 514 (((o)->nd_flag & ND_KERBAUTH) == ((n)->nd_flag & ND_KERBAUTH) && \ 515 !memcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \ 516 sizeof (struct ucred))) 517 518 /* 519 * Defines for WebNFS 520 */ 521 522 #define WEBNFS_ESC_CHAR '%' 523 #define WEBNFS_SPECCHAR_START 0x80 524 525 #define WEBNFS_NATIVE_CHAR 0x80 526 /* 527 * .. 528 * Possibly more here in the future. 529 */ 530 531 /* 532 * Macro for converting escape characters in WebNFS pathnames. 533 * Should really be in libkern. 534 */ 535 536 #define HEXTOC(c) \ 537 ((c) >= 'a' ? ((c) - ('a' - 10)) : \ 538 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0'))) 539 #define HEXSTRTOI(p) \ 540 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1])) 541 #endif /* _KERNEL */ 542 543 #endif /* _NFS_NFS_H */ 544
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