FreeBSD/Linux Kernel Cross Reference
sys/nfs/nfs.h
1 /* $NetBSD: nfs.h,v 1.48.10.1 2005/09/26 20:31:03 tron 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. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)nfs.h 8.4 (Berkeley) 5/1/95
34 */
35
36 #ifndef _NFS_NFS_H_
37 #define _NFS_NFS_H_
38
39 /*
40 * Tunable constants for nfs
41 */
42
43 #define NFS_MAXIOVEC 34
44 #define NFS_TICKINTVL 5 /* Desired time for a tick (msec) */
45 #define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
46 #define NFS_TIMEO (3 * NFS_HZ) /* Default timeout = 3 seconds */
47 #define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */
48 #define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */
49 #define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/
50 #define NFS_MAXREXMIT 100 /* Stop counting after this many */
51 #define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */
52 #define NFS_RETRANS 10 /* Num of retrans for soft mounts */
53 #define NFS_MAXGRPS 16 /* Max. size of groups list */
54 #ifndef NFS_MINATTRTIMO
55 #define NFS_MINATTRTIMO 5 /* Attribute cache timeout in sec */
56 #endif
57 #ifndef NFS_MAXATTRTIMO
58 #define NFS_MAXATTRTIMO 60
59 #endif
60 #define NFS_TRYLATERDEL 1 /* Initial try later delay (sec) */
61 #define NFS_TRYLATERDELMAX (1*60) /* Maximum try later delay (sec) */
62 #define NFS_TRYLATERDELMUL 2 /* Exponential backoff multiplier */
63
64 /*
65 * These can be overridden through <machine/param.h>, included via
66 * <sys/param.h>. This means that <sys/param.h> should always be
67 * included before this file.
68 */
69 #ifndef NFS_WSIZE
70 #define NFS_WSIZE 8192 /* Def. write data size */
71 #endif
72 #ifndef NFS_RSIZE
73 #define NFS_RSIZE 8192 /* Def. read data size */
74 #endif
75 #ifndef NFS_READDIRSIZE
76 #define NFS_READDIRSIZE 8192 /* Def. readdir size */
77 #endif
78
79 /*
80 * NFS client IO daemon threads. May be overridden by config options.
81 */
82 #ifndef NFS_MAXASYNCDAEMON
83 #define NFS_MAXASYNCDAEMON 128 /* Max. number async_daemons runable */
84 #endif
85
86 /*
87 * NFS client read-ahead. May be overridden by config options.
88 * Should be no more than NFS_MAXASYNCDAEMON as each read-ahead operation
89 * requires one IO thread.
90 */
91 #ifndef NFS_MAXRAHEAD
92 #define NFS_MAXRAHEAD 32 /* Max. read ahead # blocks */
93 #endif
94 #define NFS_DEFRAHEAD 2 /* Def. read ahead # blocks */
95
96 #define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */
97
98 #ifdef _KERNEL
99 extern int nfs_niothreads; /* Number of async_daemons desired */
100 #ifndef NFS_DEFAULT_NIOTHREADS
101 #define NFS_DEFAULT_NIOTHREADS 4
102 #endif
103 #endif
104 #define NFS_MAXGATHERDELAY 100 /* Max. write gather delay (msec) */
105 #ifndef NFS_GATHERDELAY
106 #define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */
107 #endif
108
109 /*
110 * NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for
111 * NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount
112 * of data in those buffers, and thus the minimum amount of data
113 * that you can request. NFS_DIRFRAGSIZ should be no smaller than
114 * DIRBLKSIZ.
115 */
116
117 #define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */
118 #define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */
119
120 /*
121 * Maximum number of directory entries cached per NFS node, to avoid
122 * having this grow without bounds on very large directories. The
123 * minimum size to get reasonable performance for emulated binaries
124 * is the maximum number of entries that fits in NFS_DIRBLKSIZ.
125 * For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36.
126 */
127 #define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14)
128
129 /*
130 * Oddballs
131 */
132 #define NFS_CMPFH(n, f, s) \
133 ((n)->n_fhsize == (s) && !memcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s)))
134 #ifdef NFS_V2_ONLY
135 #define NFS_ISV3(v) (0)
136 #else
137 #define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
138 #endif
139 #define NFS_SRVMAXDATA(n) \
140 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
141 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
142
143 /*
144 * Use the vm_page flag reserved for pager use to indicate pages
145 * which have been written to the server but not yet committed.
146 */
147 #define PG_NEEDCOMMIT PG_PAGER1
148
149 /*
150 * The IO_METASYNC flag should be implemented for local file systems.
151 * (Until then, it is nothin at all.)
152 */
153 #ifndef IO_METASYNC
154 #define IO_METASYNC 0
155 #endif
156
157 /*
158 * Set the attribute timeout based on how recently the file has been modified.
159 */
160 #define NFS_ATTRTIMEO(nmp, np) \
161 ((nmp->nm_flag & NFSMNT_NOAC) ? 0 : \
162 ((((np)->n_flag & NMODIFIED) || \
163 (time.tv_sec - (np)->n_mtime.tv_sec) / 10 < NFS_MINATTRTIMO) ? NFS_MINATTRTIMO : \
164 ((time.tv_sec - (np)->n_mtime.tv_sec) / 10 > NFS_MAXATTRTIMO ? NFS_MAXATTRTIMO : \
165 (time.tv_sec - (np)->n_mtime.tv_sec) / 10)))
166
167 /*
168 * Structures for the nfssvc(2) syscall. Not that anyone but nfsd and mount_nfs
169 * should ever try and use it.
170 */
171 struct nfsd_args {
172 int sock; /* Socket to serve */
173 caddr_t name; /* Client addr for connection based sockets */
174 int namelen; /* Length of name */
175 };
176
177 struct nfsd_srvargs {
178 struct nfsd *nsd_nfsd; /* Pointer to in kernel nfsd struct */
179 uid_t nsd_uid; /* Effective uid mapped to cred */
180 u_int32_t nsd_haddr; /* Ip address of client */
181 struct uucred nsd_cr; /* Cred. uid maps to */
182 int nsd_authlen; /* Length of auth string (ret) */
183 u_char *nsd_authstr; /* Auth string (ret) */
184 int nsd_verflen; /* and the verfier */
185 u_char *nsd_verfstr;
186 struct timeval nsd_timestamp; /* timestamp from verifier */
187 u_int32_t nsd_ttl; /* credential ttl (sec) */
188 NFSKERBKEY_T nsd_key; /* Session key */
189 };
190
191 struct nfsd_cargs {
192 char *ncd_dirp; /* Mount dir path */
193 uid_t ncd_authuid; /* Effective uid */
194 int ncd_authtype; /* Type of authenticator */
195 u_int ncd_authlen; /* Length of authenticator string */
196 u_char *ncd_authstr; /* Authenticator string */
197 u_int ncd_verflen; /* and the verifier */
198 u_char *ncd_verfstr;
199 NFSKERBKEY_T ncd_key; /* Session key */
200 };
201
202 /*
203 * Stats structure
204 */
205 struct nfsstats {
206 int attrcache_hits;
207 int attrcache_misses;
208 int lookupcache_hits;
209 int lookupcache_misses;
210 int direofcache_hits;
211 int direofcache_misses;
212 int biocache_reads;
213 int read_bios;
214 int read_physios;
215 int biocache_writes;
216 int write_bios;
217 int write_physios;
218 int biocache_readlinks;
219 int readlink_bios;
220 int biocache_readdirs;
221 int readdir_bios;
222 int rpccnt[NFS_NPROCS];
223 int rpcretries;
224 int srvrpccnt[NFS_NPROCS];
225 int srvrpc_errs;
226 int srv_errs;
227 int rpcrequests;
228 int rpctimeouts;
229 int rpcunexpected;
230 int rpcinvalid;
231 int srvcache_inproghits;
232 int srvcache_idemdonehits;
233 int srvcache_nonidemdonehits;
234 int srvcache_misses;
235 int srvnqnfs_leases;
236 int srvnqnfs_maxleases;
237 int srvnqnfs_getleases;
238 int srvvop_writes;
239 };
240
241 /*
242 * Flags for nfssvc() system call.
243 */
244 #define NFSSVC_BIOD 0x002
245 #define NFSSVC_NFSD 0x004
246 #define NFSSVC_ADDSOCK 0x008
247 #define NFSSVC_AUTHIN 0x010
248 #define NFSSVC_GOTAUTH 0x040
249 #define NFSSVC_AUTHINFAIL 0x080
250 #define NFSSVC_MNTD 0x100
251
252 /*
253 * fs.nfs sysctl(3) identifiers
254 */
255 #define NFS_NFSSTATS 1 /* struct: struct nfsstats */
256 #define NFS_IOTHREADS 2 /* number of io threads */
257 #define NFS_MAXID 3
258
259 #define NFS_NAMES { \
260 { 0, 0 }, \
261 { "nfsstats", CTLTYPE_STRUCT }, \
262 { "iothreads", CTLTYPE_INT }, \
263 }
264
265 /*
266 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
267 * What should be in this set is open to debate, but I believe that since
268 * I/O system calls on ufs are never interrupted by signals the set should
269 * be minimal. My reasoning is that many current programs that use signals
270 * such as SIGALRM will not expect file I/O system calls to be interrupted
271 * by them and break.
272 */
273 #ifdef _KERNEL
274
275 struct uio; struct buf; struct vattr; struct nameidata; /* XXX */
276
277 /*
278 * Socket errors ignored for connectionless sockets??
279 * For now, ignore them all
280 */
281 #define NFSIGNORE_SOERROR(s, e) \
282 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
283 ((s) & PR_CONNREQUIRED) == 0)
284
285 /*
286 * Nfs outstanding request list element
287 */
288 struct nfsreq {
289 TAILQ_ENTRY(nfsreq) r_chain;
290 struct mbuf *r_mreq;
291 struct mbuf *r_mrep;
292 struct mbuf *r_md;
293 caddr_t r_dpos;
294 struct nfsmount *r_nmp;
295 u_int32_t r_xid;
296 int r_flags; /* flags on request, see below */
297 int r_retry; /* max retransmission count */
298 int r_rexmit; /* current retrans count */
299 int r_timer; /* tick counter on reply */
300 u_int32_t r_procnum; /* NFS procedure number */
301 int r_rtt; /* RTT for rpc */
302 struct proc *r_procp; /* Proc that did I/O system call */
303 };
304
305 /*
306 * Queue head for nfsreq's
307 */
308 extern TAILQ_HEAD(nfsreqhead, nfsreq) nfs_reqq;
309
310 /* Flag values for r_flags */
311 #define R_TIMING 0x01 /* timing request (in mntp) */
312 #define R_SENT 0x02 /* request has been sent */
313 #define R_SOFTTERM 0x04 /* soft mnt, too many retries */
314 #define R_INTR 0x08 /* intr mnt, signal pending */
315 #define R_SOCKERR 0x10 /* Fatal error on socket */
316 #define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
317 #define R_MUSTRESEND 0x40 /* Must resend request */
318 #define R_GETONEREP 0x80 /* Probe for one reply only */
319 #define R_REXMITTED 0x100 /* retransmitted after reconnect */
320
321 /*
322 * A list of nfssvc_sock structures is maintained with all the sockets
323 * that require service by the nfsd.
324 * The nfsuid structs hang off of the nfssvc_sock structs in both lru
325 * and uid hash lists.
326 */
327 #ifndef NFS_UIDHASHSIZ
328 #define NFS_UIDHASHSIZ 29 /* Tune the size of nfssvc_sock with this */
329 #endif
330 #define NUIDHASH(sock, uid) \
331 (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ])
332 #ifndef NFS_WDELAYHASHSIZ
333 #define NFS_WDELAYHASHSIZ 16 /* and with this */
334 #endif
335 #define NWDELAYHASH(sock, f) \
336 (&(sock)->ns_wdelayhashtbl[(*((u_int32_t *)(f))) % NFS_WDELAYHASHSIZ])
337 #ifndef NFS_MUIDHASHSIZ
338 #define NFS_MUIDHASHSIZ 63 /* Tune the size of nfsmount with this */
339 #endif
340 #define NMUIDHASH(nmp, uid) \
341 (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ])
342 #define NFSNOHASH(fhsum) ((fhsum) & nfsnodehash)
343
344 #ifndef NFS_DIRHASHSIZ
345 #define NFS_DIRHASHSIZ 64
346 #endif
347 #define NFSDIRHASH(np, off) \
348 (&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)])
349
350 /*
351 * Macros for storing/retrieving cookies into directory buffers.
352 */
353 #define NFS_STASHCOOKIE(dp,off) \
354 *((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t))) = off
355 #define NFS_GETCOOKIE(dp) \
356 (*((off_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t))))
357 #define NFS_STASHCOOKIE32(dp, val) \
358 *((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \
359 sizeof (int))) = val
360 #define NFS_GETCOOKIE32(dp) \
361 (*((u_int32_t *)((caddr_t)(dp) + (dp)->d_reclen - sizeof (off_t) - \
362 sizeof (int))))
363
364 /*
365 * Flags passed to nfs_bioread().
366 */
367 #define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */
368
369 /*
370 * Network address hash list element
371 */
372 union nethostaddr {
373 u_int32_t had_inetaddr;
374 struct mbuf *had_nam;
375 };
376
377 struct nfsuid {
378 TAILQ_ENTRY(nfsuid) nu_lru; /* LRU chain */
379 LIST_ENTRY(nfsuid) nu_hash; /* Hash list */
380 int nu_flag; /* Flags */
381 union nethostaddr nu_haddr; /* Host addr. for dgram sockets */
382 struct ucred nu_cr; /* Cred uid mapped to */
383 int nu_expire; /* Expiry time (sec) */
384 struct timeval nu_timestamp; /* Kerb. timestamp */
385 u_int32_t nu_nickname; /* Nickname on server */
386 NFSKERBKEY_T nu_key; /* and session key */
387 };
388
389 #define nu_inetaddr nu_haddr.had_inetaddr
390 #define nu_nam nu_haddr.had_nam
391 /* Bits for nu_flag */
392 #define NU_INETADDR 0x1
393 #define NU_NAM 0x2
394 #ifdef INET6
395 #define NU_NETFAM(u) \
396 (((u)->nu_flag & NU_INETADDR) ? \
397 (((u)->nu_flag & NU_NAM) ? AF_INET6 : AF_INET) : AF_ISO)
398 #else
399 #define NU_NETFAM(u) (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO)
400 #endif
401
402 struct nfssvc_sock {
403 TAILQ_ENTRY(nfssvc_sock) ns_chain; /* List of all nfssvc_sock's */
404 TAILQ_ENTRY(nfssvc_sock) ns_pending; /* List of pending sockets */
405 TAILQ_HEAD(, nfsuid) ns_uidlruhead;
406 struct file *ns_fp;
407 struct socket *ns_so;
408 struct mbuf *ns_nam;
409 struct mbuf *ns_raw;
410 struct mbuf *ns_rawend;
411 struct mbuf *ns_rec;
412 struct mbuf *ns_recend;
413 struct mbuf *ns_frag;
414 int ns_flag;
415 int ns_solock;
416 int ns_cc;
417 int ns_reclen;
418 int ns_numuids;
419 u_int32_t ns_sref;
420 LIST_HEAD(, nfsrv_descript) ns_tq; /* Write gather lists */
421 LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];
422 LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ];
423 };
424
425 /* Bits for "ns_flag" */
426 #define SLP_VALID 0x01
427 #define SLP_DOREC 0x02
428 #define SLP_NEEDQ 0x04
429 #define SLP_DISCONN 0x08
430 #define SLP_GETSTREAM 0x10
431 #define SLP_LASTFRAG 0x20
432 #define SLP_ALLFLAGS 0xff
433
434 extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
435 extern struct nfssvc_sockhead nfssvc_sockpending;
436 extern int nfssvc_sockhead_flag;
437 #define SLP_INIT 0x01
438 #define SLP_WANTINIT 0x02
439
440 /*
441 * One of these structures is allocated for each nfsd.
442 */
443 struct nfsd {
444 TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */
445 SLIST_ENTRY(nfsd) nfsd_idle; /* List of idle 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 extern struct simplelock nfsd_slock;
503 extern TAILQ_HEAD(nfsdhead, nfsd) nfsd_head;
504 extern SLIST_HEAD(nfsdidlehead, nfsd) nfsd_idle_head;
505 extern int nfsd_head_flag;
506 #define NFSD_CHECKSLP 0x01
507
508 extern struct mowner nfs_mowner;
509 extern struct nfsstats nfsstats;
510 extern int nfs_numasync;
511
512 /*
513 * These macros compare nfsrv_descript structures.
514 */
515 #define NFSW_CONTIG(o, n) \
516 ((o)->nd_eoff >= (n)->nd_off && \
517 !memcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH))
518
519 #define NFSW_SAMECRED(o, n) \
520 (((o)->nd_flag & ND_KERBAUTH) == ((n)->nd_flag & ND_KERBAUTH) && \
521 !memcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
522 sizeof (struct ucred)))
523
524 /*
525 * Defines for WebNFS
526 */
527
528 #define WEBNFS_ESC_CHAR '%'
529 #define WEBNFS_SPECCHAR_START 0x80
530
531 #define WEBNFS_NATIVE_CHAR 0x80
532 /*
533 * ..
534 * Possibly more here in the future.
535 */
536
537 /*
538 * Macro for converting escape characters in WebNFS pathnames.
539 * Should really be in libkern.
540 */
541
542 #define HEXTOC(c) \
543 ((c) >= 'a' ? ((c) - ('a' - 10)) : \
544 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '')))
545 #define HEXSTRTOI(p) \
546 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
547 #endif /* _KERNEL */
548
549 #endif /* _NFS_NFS_H */
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