1/* $NetBSD: nfs.h,v 1.75 2015/04/20 13:12:24 riastradh 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#ifdef _KERNEL
40#include <sys/condvar.h>
41#include <sys/fstypes.h>
42#include <sys/mbuf.h>
43#include <sys/mutex.h>
44#endif
45
46/*
47 * Tunable constants for nfs
48 */
49
50#define NFS_MAXIOVEC 34
51#define NFS_TICKINTVL 5 /* Desired time for a tick (msec) */
52#define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
53#define NFS_TIMEO (3 * NFS_HZ) /* Default timeout = 3 seconds */
54#define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */
55#define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */
56#define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/
57#define NFS_MAXREXMIT 100 /* Stop counting after this many */
58#define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */
59#define NFS_RETRANS 10 /* Num of retrans for soft mounts */
60#define NFS_MAXGRPS 16 /* Max. size of groups list */
61#ifndef NFS_MINATTRTIMO
62#define NFS_MINATTRTIMO 5 /* Attribute cache timeout in sec */
63#endif
64#ifndef NFS_MAXATTRTIMO
65#define NFS_MAXATTRTIMO 60
66#endif
67#define NFS_TRYLATERDEL 1 /* Initial try later delay (sec) */
68#define NFS_TRYLATERDELMAX (1*60) /* Maximum try later delay (sec) */
69#define NFS_TRYLATERDELMUL 2 /* Exponential backoff multiplier */
70
71#define NFS_CWNDSCALE 256
72#define NFS_MAXCWND (NFS_CWNDSCALE * 32)
73
74/*
75 * These can be overridden through <machine/param.h>, included via
76 * <sys/param.h>. This means that <sys/param.h> should always be
77 * included before this file.
78 */
79#ifndef NFS_WSIZE
80#define NFS_WSIZE 8192 /* Def. write data size */
81#endif
82#ifndef NFS_RSIZE
83#define NFS_RSIZE 8192 /* Def. read data size */
84#endif
85#ifndef NFS_READDIRSIZE
86#define NFS_READDIRSIZE 8192 /* Def. readdir size */
87#endif
88
89/*
90 * NFS client IO daemon threads. May be overridden by config options.
91 */
92#ifndef NFS_MAXASYNCDAEMON
93#define NFS_MAXASYNCDAEMON 128 /* Max. number async_daemons runable */
94#endif
95
96/*
97 * NFS client read-ahead. May be overridden by config options.
98 * Should be no more than NFS_MAXASYNCDAEMON as each read-ahead operation
99 * requires one IO thread.
100 */
101#ifndef NFS_MAXRAHEAD
102#define NFS_MAXRAHEAD 32 /* Max. read ahead # blocks */
103#endif
104#define NFS_DEFRAHEAD 2 /* Def. read ahead # blocks */
105
106#define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */
107
108#define NFS_DEFDEADTHRESH NFS_NEVERDEAD /* Default nm_deadthresh */
109#define NFS_NEVERDEAD 9 /* Greater than max. nm_timeouts */
110
111#ifdef _KERNEL
112extern int nfs_niothreads; /* Number of async_daemons desired */
113#ifndef NFS_DEFAULT_NIOTHREADS
114#define NFS_DEFAULT_NIOTHREADS 4
115#endif
116#endif
117#define NFS_MAXGATHERDELAY 100 /* Max. write gather delay (msec) */
118#ifndef NFS_GATHERDELAY
119#define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */
120#endif
121
122/*
123 * NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for
124 * NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount
125 * of data in those buffers, and thus the minimum amount of data
126 * that you can request. NFS_DIRFRAGSIZ should be no smaller than
127 * DIRBLKSIZ.
128 */
129
130#define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */
131#define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */
132
133/*
134 * Maximum number of directory entries cached per NFS node, to avoid
135 * having this grow without bounds on very large directories. The
136 * minimum size to get reasonable performance for emulated binaries
137 * is the maximum number of entries that fits in NFS_DIRBLKSIZ.
138 * For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36.
139 */
140#define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14)
141
142/*
143 * Oddballs
144 */
145#define NFS_CMPFH(n, f, s) \
146 ((n)->n_fhsize == (s) && !memcmp((void *)(n)->n_fhp, (void *)(f), (s)))
147#ifdef NFS_V2_ONLY
148#define NFS_ISV3(v) (0)
149#else
150#define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
151#endif
152#define NFS_SRVMAXDATA(n) \
153 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
154 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
155
156/*
157 * Use the vm_page flag reserved for pager use to indicate pages
158 * which have been written to the server but not yet committed.
159 */
160#define PG_NEEDCOMMIT PG_PAGER1
161
162/*
163 * The IO_METASYNC flag should be implemented for local file systems.
164 * (Until then, it is nothin at all.)
165 */
166#ifndef IO_METASYNC
167#define IO_METASYNC 0
168#endif
169
170/*
171 * Export arguments for local filesystem mount calls.
172 * Keep in mind that changing this structure modifies nfssvc(2)'s ABI (see
173 * 'struct mountd_exports_list' below).
174 * When modifying this structure, take care to also edit the
175 * nfs_update_exports_30 function in nfs_export.c accordingly to convert
176 * export_args to export_args30.
177 */
178struct export_args {
179 int ex_flags; /* export related flags */
180 uid_t ex_root; /* mapping for root uid */
181 struct uucred ex_anon; /* mapping for anonymous user */
182 struct sockaddr *ex_addr; /* net address to which exported */
183 int ex_addrlen; /* and the net address length */
184 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
185 int ex_masklen; /* and the smask length */
186 char *ex_indexfile; /* index file for WebNFS URLs */
187};
188
189/*
190 * Structures for the nfssvc(2) syscall. Not that anyone but mountd, nfsd and
191 * mount_nfs should ever try and use it.
192 */
193struct nfsd_args {
194 int sock; /* Socket to serve */
195 void * name; /* Client addr for connection based sockets */
196 int namelen; /* Length of name */
197};
198
199struct nfsd_srvargs {
200 struct nfsd *nsd_nfsd; /* Pointer to in kernel nfsd struct */
201 uid_t nsd_uid; /* Effective uid mapped to cred */
202 u_int32_t nsd_haddr; /* Ip address of client */
203 struct uucred nsd_cr; /* Cred. uid maps to */
204 int nsd_authlen; /* Length of auth string (ret) */
205 u_char *nsd_authstr; /* Auth string (ret) */
206 int nsd_verflen; /* and the verfier */
207 u_char *nsd_verfstr;
208 struct timeval nsd_timestamp; /* timestamp from verifier */
209 u_int32_t nsd_ttl; /* credential ttl (sec) */
210 NFSKERBKEY_T nsd_key; /* Session key */
211};
212
213struct nfsd_cargs {
214 char *ncd_dirp; /* Mount dir path */
215 uid_t ncd_authuid; /* Effective uid */
216 int ncd_authtype; /* Type of authenticator */
217 u_int ncd_authlen; /* Length of authenticator string */
218 u_char *ncd_authstr; /* Authenticator string */
219 u_int ncd_verflen; /* and the verifier */
220 u_char *ncd_verfstr;
221 NFSKERBKEY_T ncd_key; /* Session key */
222};
223
224struct mountd_exports_list {
225 const char *mel_path;
226 size_t mel_nexports;
227 struct export_args *mel_exports;
228};
229
230/*
231 * try to keep nfsstats, which is exposed to userland via sysctl,
232 * compatible after NQNFS removal.
233 * 26 is the old value of NFS_NPROCS, which includes NQNFS procedures.
234 */
235#define NFSSTATS_NPROCS 26
236
237/*
238 * Stats structure
239 */
240struct nfsstats {
241 uint32_t attrcache_hits;
242 uint32_t attrcache_misses;
243 uint32_t lookupcache_hits;
244 uint32_t lookupcache_misses;
245 uint32_t direofcache_hits;
246 uint32_t direofcache_misses;
247 uint32_t biocache_reads;
248 uint32_t read_bios;
249 uint32_t read_physios;
250 uint32_t biocache_writes;
251 uint32_t write_bios;
252 uint32_t write_physios;
253 uint32_t biocache_readlinks;
254 uint32_t readlink_bios;
255 uint32_t biocache_readdirs;
256 uint32_t readdir_bios;
257 uint32_t rpccnt[NFSSTATS_NPROCS];
258 uint32_t rpcretries;
259 uint32_t srvrpccnt[NFSSTATS_NPROCS];
260 uint32_t srvrpc_errs;
261 uint32_t srv_errs;
262 uint32_t rpcrequests;
263 uint32_t rpctimeouts;
264 uint32_t rpcunexpected;
265 uint32_t rpcinvalid;
266 uint32_t srvcache_inproghits;
267 uint32_t srvcache_idemdonehits;
268 uint32_t srvcache_nonidemdonehits;
269 uint32_t srvcache_misses;
270 uint32_t __srvnqnfs_leases; /* unused */
271 uint32_t __srvnqnfs_maxleases; /* unused */
272 uint32_t __srvnqnfs_getleases; /* unused */
273 uint32_t srvvop_writes;
274};
275
276/*
277 * Flags for nfssvc() system call.
278 */
279#define NFSSVC_BIOD 0x002
280#define NFSSVC_NFSD 0x004
281#define NFSSVC_ADDSOCK 0x008
282#define NFSSVC_AUTHIN 0x010
283#define NFSSVC_GOTAUTH 0x040
284#define NFSSVC_AUTHINFAIL 0x080
285#define NFSSVC_MNTD 0x100
286#define NFSSVC_SETEXPORTSLIST 0x200
287
288/*
289 * fs.nfs sysctl(3) identifiers
290 */
291#define NFS_NFSSTATS 1 /* struct: struct nfsstats */
292#define NFS_IOTHREADS 2 /* number of io threads */
293#define NFS_MAXID 3
294
295#define NFS_NAMES { \
296 { 0, 0 }, \
297 { "nfsstats", CTLTYPE_STRUCT }, \
298 { "iothreads", CTLTYPE_INT }, \
299}
300
301/*
302 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
303 * What should be in this set is open to debate, but I believe that since
304 * I/O system calls on ufs are never interrupted by signals the set should
305 * be minimal. My reasoning is that many current programs that use signals
306 * such as SIGALRM will not expect file I/O system calls to be interrupted
307 * by them and break.
308 */
309#ifdef _KERNEL
310
311struct uio; struct buf; struct vattr; struct nameidata; /* XXX */
312
313/*
314 * Socket errors ignored for connectionless sockets??
315 * For now, ignore them all
316 */
317#define NFSIGNORE_SOERROR(s, e) \
318 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
319 ((s) & PR_CONNREQUIRED) == 0)
320
321/*
322 * Nfs outstanding request list element
323 */
324struct nfsreq {
325 TAILQ_ENTRY(nfsreq) r_chain;
326 struct mbuf *r_mreq;
327 struct mbuf *r_mrep;
328 struct mbuf *r_md;
329 void * r_dpos;
330 struct nfsmount *r_nmp;
331 u_int32_t r_xid;
332 int r_flags; /* flags on request, see below */
333 int r_retry; /* max retransmission count */
334 int r_rexmit; /* current retrans count */
335 u_int32_t r_procnum; /* NFS procedure number */
336 int r_rtt; /* RTT for rpc */
337 struct lwp *r_lwp; /* LWP that did I/O system call */
338};
339
340/*
341 * Queue head for nfsreq's
342 */
343extern TAILQ_HEAD(nfsreqhead, nfsreq) nfs_reqq;
344
345/* Flag values for r_flags */
346#define R_TIMING 0x01 /* timing request (in mntp) */
347#define R_SENT 0x02 /* request has been sent */
348#define R_SOFTTERM 0x04 /* soft mnt, too many retries */
349#define R_INTR 0x08 /* intr mnt, signal pending */
350#define R_SOCKERR 0x10 /* Fatal error on socket */
351#define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
352#define R_MUSTRESEND 0x40 /* Must resend request */
353#define R_REXMITTED 0x100 /* retransmitted after reconnect */
354
355/*
356 * A list of nfssvc_sock structures is maintained with all the sockets
357 * that require service by the nfsd.
358 * The nfsuid structs hang off of the nfssvc_sock structs in both lru
359 * and uid hash lists.
360 */
361#ifndef NFS_UIDHASHSIZ
362#define NFS_UIDHASHSIZ 29 /* Tune the size of nfssvc_sock with this */
363#endif
364#define NUIDHASH(sock, uid) \
365 (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ])
366#ifndef NFS_WDELAYHASHSIZ
367#define NFS_WDELAYHASHSIZ 16 /* and with this */
368#endif
369#ifndef NFS_MUIDHASHSIZ
370#define NFS_MUIDHASHSIZ 63 /* Tune the size of nfsmount with this */
371#endif
372#define NMUIDHASH(nmp, uid) \
373 (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ])
374
375#ifndef NFS_DIRHASHSIZ
376#define NFS_DIRHASHSIZ 64
377#endif
378#define NFSDIRHASH(np, off) \
379 (&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)])
380
381/*
382 * Macros for storing/retrieving cookies into directory buffers.
383 */
384#define NFS_STASHCOOKIE(dp,off) \
385 *((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))) = off
386#define NFS_GETCOOKIE(dp) \
387 (*((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))))
388#define NFS_STASHCOOKIE32(dp, val) \
389 *((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
390 sizeof (int))) = val
391#define NFS_GETCOOKIE32(dp) \
392 (*((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
393 sizeof (int))))
394
395/*
396 * Flags passed to nfs_bioread().
397 */
398#define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */
399
400/*
401 * Network address hash list element
402 */
403union nethostaddr {
404 u_int32_t had_inetaddr;
405 struct mbuf *had_nam;
406};
407
408struct nfsuid {
409 TAILQ_ENTRY(nfsuid) nu_lru; /* LRU chain */
410 LIST_ENTRY(nfsuid) nu_hash; /* Hash list */
411 int nu_flag; /* Flags */
412 union nethostaddr nu_haddr; /* Host addr. for dgram sockets */
413 kauth_cred_t nu_cr; /* Cred uid mapped to */
414 int nu_expire; /* Expiry time (sec) */
415 struct timeval nu_timestamp; /* Kerb. timestamp */
416 u_int32_t nu_nickname; /* Nickname on server */
417 NFSKERBKEY_T nu_key; /* and session key */
418};
419
420#define nu_inetaddr nu_haddr.had_inetaddr
421#define nu_nam nu_haddr.had_nam
422/* Bits for nu_flag */
423#define NU_INETADDR 0x1
424#define NU_NAM 0x2
425#define NU_NETFAM(u) \
426 (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_INET6)
427
428/*
429 * b: protected by SLP_BUSY
430 * g: protected by nfsd_lock
431 * s: protected by ns_lock
432 * a: protected by ns_alock
433 */
434
435struct nfssvc_sock {
436 kmutex_t ns_lock;
437 kmutex_t ns_alock;
438 kcondvar_t ns_cv; /* s: */
439 TAILQ_ENTRY(nfssvc_sock) ns_chain; /* g: List of all nfssvc_sock */
440 TAILQ_ENTRY(nfssvc_sock) ns_pending; /* g: List of pending sockets */
441 TAILQ_HEAD(, nfsuid) ns_uidlruhead;
442 struct file *ns_fp;
443 struct socket *ns_so;
444 struct mbuf *ns_nam;
445 struct mbuf *ns_raw; /* b: */
446 struct mbuf *ns_rawend; /* b: */
447 struct mbuf *ns_rec; /* b: */
448 struct mbuf *ns_recend; /* b: */
449 struct mbuf *ns_frag; /* b: */
450 int ns_flags; /* s: */
451 int ns_aflags; /* a: */
452 int ns_gflags; /* g: */
453 int ns_sflags; /* b: */
454 int ns_cc; /* b: */
455 int ns_reclen; /* b: */
456 int ns_numuids;
457 u_int32_t ns_sref; /* g: */
458 SIMPLEQ_HEAD(, nfsrv_descript) ns_sendq; /* s: send reply list */
459 LIST_HEAD(, nfsrv_descript) ns_tq; /* g: Write gather lists */
460 LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];
461 LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; /* g: */
462};
463
464/* Bits for "ns_flags" */
465#define SLP_VALID 0x01
466#define SLP_BUSY 0x10
467#define SLP_SENDING 0x80
468
469/* Bits for "ns_aflags" */
470#define SLP_A_NEEDQ 0x01
471#define SLP_A_DISCONN 0x04
472
473/* Bits for "ns_gflags" */
474#define SLP_G_DOREC 0x02 /* on nfssvc_sockpending queue */
475
476/* Bits for "ns_sflags" */
477#define SLP_S_LASTFRAG 0x40
478
479extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
480extern struct nfssvc_sockhead nfssvc_sockpending;
481extern int nfssvc_sockhead_flag;
482#define SLP_INIT 0x01
483
484/*
485 * One of these structures is allocated for each nfsd.
486 */
487struct nfsd {
488 TAILQ_ENTRY(nfsd) nfsd_chain; /* List of all nfsd's */
489 SLIST_ENTRY(nfsd) nfsd_idle; /* List of idle nfsd's */
490 kcondvar_t nfsd_cv;
491 int nfsd_flag; /* NFSD_ flags */
492 struct nfssvc_sock *nfsd_slp; /* Current socket */
493 int nfsd_authlen; /* Authenticator len */
494 u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
495 int nfsd_verflen; /* and the Verifier */
496 u_char nfsd_verfstr[RPCVERF_MAXSIZ];
497 struct proc *nfsd_procp; /* Proc ptr */
498 struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */
499};
500
501/* Bits for "nfsd_flag" */
502#define NFSD_NEEDAUTH 0x04
503#define NFSD_AUTHFAIL 0x08
504
505#define NFSD_MAXFHSIZE 64
506typedef struct nfsrvfh {
507 size_t nsfh_size;
508 union {
509 fhandle_t u_fh;
510 uint8_t u_opaque[NFSD_MAXFHSIZE];
511 } nsfh_u;
512} nfsrvfh_t;
513#define NFSRVFH_SIZE(nsfh) ((nsfh)->nsfh_size)
514#define NFSRVFH_DATA(nsfh) ((nsfh)->nsfh_u.u_opaque)
515#define NFSRVFH_FHANDLE(nsfh) (&(nsfh)->nsfh_u.u_fh)
516
517/*
518 * This structure is used by the server for describing each request.
519 * Some fields are used only when write request gathering is performed.
520 */
521struct nfsrv_descript {
522 u_quad_t nd_time; /* Write deadline (usec) */
523 off_t nd_off; /* Start byte offset */
524 off_t nd_eoff; /* and end byte offset */
525 LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */
526 LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */
527 LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */
528 SIMPLEQ_ENTRY(nfsrv_descript) nd_sendq; /* send reply list */
529 struct mbuf *nd_mrep; /* Request mbuf list */
530 struct mbuf *nd_md; /* Current dissect mbuf */
531 struct mbuf *nd_mreq; /* Reply mbuf list */
532 struct mbuf *nd_nam; /* and socket addr */
533 struct mbuf *nd_nam2; /* return socket addr */
534 void * nd_dpos; /* Current dissect pos */
535 u_int32_t nd_procnum; /* RPC # */
536 int nd_stable; /* storage type */
537 int nd_flag; /* nd_flag */
538 int nd_len; /* Length of this write */
539 int nd_repstat; /* Reply status */
540 u_int32_t nd_retxid; /* Reply xid */
541 u_int32_t nd_duration; /* Lease duration */
542 struct timeval nd_starttime; /* Time RPC initiated */
543 nfsrvfh_t nd_fh; /* File handle */
544 kauth_cred_t nd_cr; /* Credentials */
545};
546
547/* Bits for "nd_flag" */
548#define ND_READ 0x01 /* Check lease for readers */
549#define ND_WRITE 0x02 /* Check lease for modifiers */
550#define ND_CHECK 0x04
551#define ND_LEASE (ND_READ | ND_WRITE | ND_CHECK)
552#define ND_NFSV3 0x08
553#define ND_KERBNICK 0x20
554#define ND_KERBFULL 0x40
555#define ND_KERBAUTH (ND_KERBNICK | ND_KERBFULL)
556
557extern kmutex_t nfsd_lock;
558extern kcondvar_t nfsd_initcv;
559extern TAILQ_HEAD(nfsdhead, nfsd) nfsd_head;
560extern SLIST_HEAD(nfsdidlehead, nfsd) nfsd_idle_head;
561extern int nfsd_head_flag;
562#define NFSD_CHECKSLP 0x01
563
564extern struct mowner nfs_mowner;
565extern struct nfsstats nfsstats;
566extern int nfs_numasync;
567
568/*
569 * These macros compare nfsrv_descript structures.
570 */
571#define NFSW_CONTIG(o, n) \
572 ((o)->nd_eoff >= (n)->nd_off && \
573 !memcmp((void *)&(o)->nd_fh, (void *)&(n)->nd_fh, NFSX_V3FH))
574
575/*
576 * Defines for WebNFS
577 */
578
579#define WEBNFS_ESC_CHAR '%'
580#define WEBNFS_SPECCHAR_START 0x80
581
582#define WEBNFS_NATIVE_CHAR 0x80
583/*
584 * ..
585 * Possibly more here in the future.
586 */
587
588/*
589 * Macro for converting escape characters in WebNFS pathnames.
590 * Should really be in libkern.
591 */
592
593#define HEXTOC(c) \
594 ((c) >= 'a' ? ((c) - ('a' - 10)) : \
595 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
596#define HEXSTRTOI(p) \
597 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
598
599/*
600 * Structure holding information for a publicly exported filesystem
601 * (WebNFS). Currently the specs allow just for one such filesystem.
602 */
603struct nfs_public {
604 int np_valid; /* Do we hold valid information */
605 fhandle_t *np_handle; /* Filehandle for pub fs (internal) */
606 struct mount *np_mount; /* Mountpoint of exported fs */
607 char *np_index; /* Index file */
608};
609#endif /* _KERNEL */
610
611#endif /* _NFS_NFS_H */
612