master
1/* $NetBSD: nfs.h,v 1.80 2021/12/05 07:44:53 msaitoh 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#include <sys/rbtree.h>
45#endif
46
47/*
48 * Tunable constants for nfs
49 */
50
51#define NFS_MAXIOVEC 34
52#define NFS_TICKINTVL 5 /* Desired time for a tick (msec) */
53#define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
54#define NFS_TIMEO (3 * NFS_HZ) /* Default timeout = 3 seconds */
55#define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */
56#define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */
57#define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/
58#define NFS_MAXREXMIT 100 /* Stop counting after this many */
59#define NFS_MAXWINDOW 1024 /* Max number of outstanding requests */
60#define NFS_RETRANS 10 /* Num of retrans for soft mounts */
61#define NFS_MAXGRPS 16 /* Max. size of groups list */
62#ifndef NFS_MINATTRTIMO
63#define NFS_MINATTRTIMO 5 /* Attribute cache timeout in sec */
64#endif
65#ifndef NFS_MAXATTRTIMO
66#define NFS_MAXATTRTIMO 60
67#endif
68#define NFS_TRYLATERDEL 1 /* Initial try later delay (sec) */
69#define NFS_TRYLATERDELMAX (1*60) /* Maximum try later delay (sec) */
70#define NFS_TRYLATERDELMUL 2 /* Exponential backoff multiplier */
71
72#define NFS_CWNDSCALE 256
73#define NFS_MAXCWND (NFS_CWNDSCALE * 32)
74
75/*
76 * These can be overridden through <machine/param.h>, included via
77 * <sys/param.h>. This means that <sys/param.h> should always be
78 * included before this file.
79 */
80#ifndef NFS_WSIZE
81#define NFS_WSIZE 8192 /* Def. write data size */
82#endif
83#ifndef NFS_RSIZE
84#define NFS_RSIZE 8192 /* Def. read data size */
85#endif
86#ifndef NFS_READDIRSIZE
87#define NFS_READDIRSIZE 8192 /* Def. readdir size */
88#endif
89
90/*
91 * NFS client IO daemon threads. May be overridden by config options.
92 */
93#ifndef NFS_MAXASYNCDAEMON
94#define NFS_MAXASYNCDAEMON 128 /* Max. number async_daemons runnable */
95#endif
96
97/*
98 * NFS client read-ahead. May be overridden by config options.
99 * Should be no more than NFS_MAXASYNCDAEMON as each read-ahead operation
100 * requires one IO thread.
101 */
102#ifndef NFS_MAXRAHEAD
103#define NFS_MAXRAHEAD 32 /* Max. read ahead # blocks */
104#endif
105#define NFS_DEFRAHEAD 2 /* Def. read ahead # blocks */
106
107#define NFS_MAXUIDHASH 64 /* Max. # of hashed uid entries/mp */
108
109#define NFS_DEFDEADTHRESH NFS_NEVERDEAD /* Default nm_deadthresh */
110#define NFS_NEVERDEAD 9 /* Greater than max. nm_timeouts */
111
112#ifdef _KERNEL
113extern int nfs_niothreads; /* Number of async_daemons desired */
114#ifndef NFS_DEFAULT_NIOTHREADS
115#define NFS_DEFAULT_NIOTHREADS 4
116#endif
117#endif
118#define NFS_MAXGATHERDELAY 100 /* Max. write gather delay (msec) */
119#ifndef NFS_GATHERDELAY
120#define NFS_GATHERDELAY 10 /* Default write gather delay (msec) */
121#endif
122
123/*
124 * NFS_DIRBLKSIZ is the size of buffers in the buffer cache used for
125 * NFS directory vnodes. NFS_DIRFRAGSIZ is the minimum aligned amount
126 * of data in those buffers, and thus the minimum amount of data
127 * that you can request. NFS_DIRFRAGSIZ should be no smaller than
128 * DIRBLKSIZ.
129 */
130
131#define NFS_DIRBLKSIZ 8192 /* Must be a multiple of DIRBLKSIZ */
132#define NFS_DIRFRAGSIZ 512 /* Same as DIRBLKSIZ, generally */
133
134/*
135 * Maximum number of directory entries cached per NFS node, to avoid
136 * having this grow without bounds on very large directories. The
137 * minimum size to get reasonable performance for emulated binaries
138 * is the maximum number of entries that fits in NFS_DIRBLKSIZ.
139 * For NFS_DIRBLKSIZ = 512, this would be 512 / 14 = 36.
140 */
141#define NFS_MAXDIRCACHE (NFS_DIRBLKSIZ / 14)
142
143/*
144 * Oddballs
145 */
146#define NFS_CMPFH(n, f, s) \
147 ((n)->n_fhsize == (s) && !memcmp((void *)(n)->n_fhp, (void *)(f), (s)))
148#ifdef NFS_V2_ONLY
149#define NFS_ISV3(v) (0)
150#else
151#define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
152#endif
153#define NFS_SRVMAXDATA(n) \
154 (((n)->nd_flag & ND_NFSV3) ? (((n)->nd_nam2) ? \
155 NFS_MAXDGRAMDATA : NFS_MAXDATA) : NFS_V2MAXDATA)
156
157/*
158 * Use the vm_page flag reserved for pager use to indicate pages
159 * which have been written to the server but not yet committed.
160 */
161#define PG_NEEDCOMMIT PG_PAGER1
162
163/*
164 * The IO_METASYNC flag should be implemented for local file systems.
165 * (Until then, it is nothin at all.)
166 */
167#ifndef IO_METASYNC
168#define IO_METASYNC 0
169#endif
170
171/*
172 * Export arguments for local filesystem mount calls.
173 * Keep in mind that changing this structure modifies nfssvc(2)'s ABI (see
174 * 'struct mountd_exports_list' below).
175 * When modifying this structure, take care to also edit the
176 * nfs_update_exports_30 function in nfs_export.c accordingly to convert
177 * export_args to export_args30.
178 */
179struct export_args {
180 int ex_flags; /* export related flags */
181 uid_t ex_root; /* mapping for root uid */
182 struct uucred ex_anon; /* mapping for anonymous user */
183 struct sockaddr *ex_addr; /* net address to which exported */
184 int ex_addrlen; /* and the net address length */
185 struct sockaddr *ex_mask; /* mask of valid bits in saddr */
186 int ex_masklen; /* and the smask length */
187 char *ex_indexfile; /* index file for WebNFS URLs */
188};
189
190/*
191 * Structures for the nfssvc(2) syscall. Not that anyone but mountd, nfsd and
192 * mount_nfs should ever try and use it.
193 */
194struct nfsd_args {
195 int sock; /* Socket to serve */
196 void * name; /* Client addr for connection based sockets */
197 int namelen; /* Length of name */
198};
199
200struct nfsd_srvargs {
201 struct nfsd *nsd_nfsd; /* Pointer to in kernel nfsd struct */
202 uid_t nsd_uid; /* Effective uid mapped to cred */
203 u_int32_t nsd_haddr; /* Ip address of client */
204 struct uucred nsd_cr; /* Cred. uid maps to */
205 int nsd_authlen; /* Length of auth string (ret) */
206 u_char *nsd_authstr; /* Auth string (ret) */
207 int nsd_verflen; /* and the verfier */
208 u_char *nsd_verfstr;
209 struct timeval nsd_timestamp; /* timestamp from verifier */
210 u_int32_t nsd_ttl; /* credential ttl (sec) */
211 NFSKERBKEY_T nsd_key; /* Session key */
212};
213
214struct nfsd_cargs {
215 char *ncd_dirp; /* Mount dir path */
216 uid_t ncd_authuid; /* Effective uid */
217 int ncd_authtype; /* Type of authenticator */
218 u_int ncd_authlen; /* Length of authenticator string */
219 u_char *ncd_authstr; /* Authenticator string */
220 u_int ncd_verflen; /* and the verifier */
221 u_char *ncd_verfstr;
222 NFSKERBKEY_T ncd_key; /* Session key */
223};
224
225struct mountd_exports_list {
226 const char *mel_path;
227 size_t mel_nexports;
228 struct export_args *mel_exports;
229};
230
231/*
232 * try to keep nfsstats, which is exposed to userland via sysctl,
233 * compatible after NQNFS removal.
234 * 26 is the old value of NFS_NPROCS, which includes NQNFS procedures.
235 */
236#define NFSSTATS_NPROCS 26
237
238/*
239 * Stats structure
240 */
241struct nfsstats {
242 uint32_t attrcache_hits;
243 uint32_t attrcache_misses;
244 uint32_t lookupcache_hits;
245 uint32_t lookupcache_misses;
246 uint32_t direofcache_hits;
247 uint32_t direofcache_misses;
248 uint32_t biocache_reads;
249 uint32_t read_bios;
250 uint32_t read_physios;
251 uint32_t biocache_writes;
252 uint32_t write_bios;
253 uint32_t write_physios;
254 uint32_t biocache_readlinks;
255 uint32_t readlink_bios;
256 uint32_t biocache_readdirs;
257 uint32_t readdir_bios;
258 uint32_t rpccnt[NFSSTATS_NPROCS];
259 uint32_t rpcretries;
260 uint32_t srvrpccnt[NFSSTATS_NPROCS];
261 uint32_t srvrpc_errs;
262 uint32_t srv_errs;
263 uint32_t rpcrequests;
264 uint32_t rpctimeouts;
265 uint32_t rpcunexpected;
266 uint32_t rpcinvalid;
267 uint32_t srvcache_inproghits;
268 uint32_t srvcache_idemdonehits;
269 uint32_t srvcache_nonidemdonehits;
270 uint32_t srvcache_misses;
271 uint32_t __srvnqnfs_leases; /* unused */
272 uint32_t __srvnqnfs_maxleases; /* unused */
273 uint32_t __srvnqnfs_getleases; /* unused */
274 uint32_t srvvop_writes;
275};
276
277/*
278 * Flags for nfssvc() system call.
279 */
280#define NFSSVC_BIOD 0x002
281#define NFSSVC_NFSD 0x004
282#define NFSSVC_ADDSOCK 0x008
283#define NFSSVC_AUTHIN 0x010
284#define NFSSVC_GOTAUTH 0x040
285#define NFSSVC_AUTHINFAIL 0x080
286#define NFSSVC_MNTD 0x100
287#define NFSSVC_SETEXPORTSLIST 0x200
288#define NFSSVC_REPLACEEXPORTSLIST 0x400
289
290/*
291 * fs.nfs sysctl(3) identifiers
292 */
293#define NFS_NFSSTATS 1 /* struct: struct nfsstats */
294#define NFS_IOTHREADS 2 /* number of io threads */
295
296/*
297 * The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
298 * What should be in this set is open to debate, but I believe that since
299 * I/O system calls on ufs are never interrupted by signals the set should
300 * be minimal. My reasoning is that many current programs that use signals
301 * such as SIGALRM will not expect file I/O system calls to be interrupted
302 * by them and break.
303 */
304#ifdef _KERNEL
305
306struct uio; struct buf; struct vattr; struct nameidata; /* XXX */
307
308/*
309 * Socket errors ignored for connectionless sockets??
310 * For now, ignore them all
311 */
312#define NFSIGNORE_SOERROR(s, e) \
313 ((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
314 ((s) & PR_CONNREQUIRED) == 0)
315
316/*
317 * Nfs outstanding request list element
318 */
319struct nfsreq {
320 TAILQ_ENTRY(nfsreq) r_chain;
321 struct mbuf *r_mreq;
322 struct mbuf *r_mrep;
323 struct mbuf *r_md;
324 void * r_dpos;
325 struct nfsmount *r_nmp;
326 u_int32_t r_xid;
327 int r_flags; /* flags on request, see below */
328 int r_retry; /* max retransmission count */
329 int r_rexmit; /* current retrans count */
330 u_int32_t r_procnum; /* NFS procedure number */
331 int r_rtt; /* RTT for rpc */
332 struct lwp *r_lwp; /* LWP that did I/O system call */
333};
334
335/*
336 * Queue head for nfsreq's
337 */
338extern TAILQ_HEAD(nfsreqhead, nfsreq) nfs_reqq;
339extern kmutex_t nfs_reqq_lock;
340
341/* Flag values for r_flags */
342#define R_TIMING 0x01 /* timing request (in mntp) */
343#define R_SENT 0x02 /* request has been sent */
344#define R_SOFTTERM 0x04 /* soft mnt, too many retries */
345#define R_INTR 0x08 /* intr mnt, signal pending */
346#define R_SOCKERR 0x10 /* Fatal error on socket */
347#define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
348#define R_MUSTRESEND 0x40 /* Must resend request */
349#define R_REXMITTED 0x100 /* retransmitted after reconnect */
350
351/*
352 * A list of nfssvc_sock structures is maintained with all the sockets
353 * that require service by the nfsd.
354 * The nfsuid structs hang off of the nfssvc_sock structs in both lru
355 * and uid hash lists.
356 */
357#ifndef NFS_UIDHASHSIZ
358#define NFS_UIDHASHSIZ 29 /* Tune the size of nfssvc_sock with this */
359#endif
360#define NUIDHASH(sock, uid) \
361 (&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ])
362#ifndef NFS_WDELAYHASHSIZ
363#define NFS_WDELAYHASHSIZ 16 /* and with this */
364#endif
365#ifndef NFS_MUIDHASHSIZ
366#define NFS_MUIDHASHSIZ 63 /* Tune the size of nfsmount with this */
367#endif
368#define NMUIDHASH(nmp, uid) \
369 (&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ])
370
371#ifndef NFS_DIRHASHSIZ
372#define NFS_DIRHASHSIZ 64
373#endif
374#define NFSDIRHASH(np, off) \
375 (&np->n_dircache[(nfs_dirhash((off)) & nfsdirhashmask)])
376
377/*
378 * Macros for storing/retrieving cookies into directory buffers.
379 */
380#define NFS_STASHCOOKIE(dp,off) \
381 *((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))) = off
382#define NFS_GETCOOKIE(dp) \
383 (*((off_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t))))
384#define NFS_STASHCOOKIE32(dp, val) \
385 *((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
386 sizeof (int))) = val
387#define NFS_GETCOOKIE32(dp) \
388 (*((u_int32_t *)((char *)(dp) + (dp)->d_reclen - sizeof (off_t) - \
389 sizeof (int))))
390
391/*
392 * Flags passed to nfs_bioread().
393 */
394#define NFSBIO_CACHECOOKIES 0x0001 /* Cache dir offset cookies */
395
396/*
397 * Network address hash list element
398 */
399union nethostaddr {
400 u_int32_t had_inetaddr;
401 struct mbuf *had_nam;
402};
403
404struct nfsuid {
405 TAILQ_ENTRY(nfsuid) nu_lru; /* LRU chain */
406 LIST_ENTRY(nfsuid) nu_hash; /* Hash list */
407 int nu_flag; /* Flags */
408 union nethostaddr nu_haddr; /* Host addr. for dgram sockets */
409 kauth_cred_t nu_cr; /* Cred uid mapped to */
410 int nu_expire; /* Expiry time (sec) */
411 struct timeval nu_timestamp; /* Kerb. timestamp */
412 u_int32_t nu_nickname; /* Nickname on server */
413 NFSKERBKEY_T nu_key; /* and session key */
414};
415
416#define nu_inetaddr nu_haddr.had_inetaddr
417#define nu_nam nu_haddr.had_nam
418/* Bits for nu_flag */
419#define NU_INETADDR 0x1
420#define NU_NAM 0x2
421#define NU_NETFAM(u) \
422 (((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_INET6)
423
424/*
425 * b: protected by SLP_BUSY
426 * g: protected by nfsd_lock
427 * s: protected by ns_lock
428 * a: protected by ns_alock
429 */
430
431struct nfssvc_sock {
432 kmutex_t ns_lock;
433 kmutex_t ns_alock;
434 kcondvar_t ns_cv; /* s: */
435 TAILQ_ENTRY(nfssvc_sock) ns_chain; /* g: List of all nfssvc_sock */
436 TAILQ_ENTRY(nfssvc_sock) ns_pending; /* g: List of pending sockets */
437 TAILQ_HEAD(, nfsuid) ns_uidlruhead;
438 struct file *ns_fp;
439 struct socket *ns_so;
440 struct mbuf *ns_nam;
441 struct mbuf *ns_raw; /* b: */
442 struct mbuf *ns_rawend; /* b: */
443 struct mbuf *ns_rec; /* b: */
444 struct mbuf *ns_recend; /* b: */
445 struct mbuf *ns_frag; /* b: */
446 int ns_flags; /* s: */
447 int ns_aflags; /* a: */
448 int ns_gflags; /* g: */
449 int ns_sflags; /* b: */
450 int ns_cc; /* b: */
451 int ns_reclen; /* b: */
452 int ns_numuids;
453 u_int32_t ns_sref; /* g: */
454 SIMPLEQ_HEAD(, nfsrv_descript) ns_sendq; /* s: send reply list */
455 LIST_HEAD(, nfsrv_descript) ns_tq; /* g: Write gather lists */
456 LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];
457 LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ]; /* g: */
458};
459
460/* Bits for "ns_flags" */
461#define SLP_VALID 0x01
462#define SLP_BUSY 0x10
463#define SLP_SENDING 0x80
464
465/* Bits for "ns_aflags" */
466#define SLP_A_NEEDQ 0x01
467#define SLP_A_DISCONN 0x04
468
469/* Bits for "ns_gflags" */
470#define SLP_G_DOREC 0x02 /* on nfssvc_sockpending queue */
471
472/* Bits for "ns_sflags" */
473#define SLP_S_LASTFRAG 0x40
474
475extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
476extern struct nfssvc_sockhead nfssvc_sockpending;
477extern int nfssvc_sockhead_flag;
478#define SLP_INIT 0x01
479
480/*
481 * One of these structures is allocated for each nfsd.
482 */
483struct nfsd {
484 struct rb_node nfsd_node; /* Tree of all nfsd's */
485 SLIST_ENTRY(nfsd) nfsd_idle; /* List of idle nfsd's */
486 kcondvar_t nfsd_cv;
487 int nfsd_flag; /* NFSD_ flags */
488 struct nfssvc_sock *nfsd_slp; /* Current socket */
489 int nfsd_authlen; /* Authenticator len */
490 u_char nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
491 int nfsd_verflen; /* and the Verifier */
492 u_char nfsd_verfstr[RPCVERF_MAXSIZ];
493 struct proc *nfsd_procp; /* Proc ptr */
494 struct nfsrv_descript *nfsd_nd; /* Associated nfsrv_descript */
495 uint32_t nfsd_cookie; /* Userland cookie, fits 32bit ptr */
496};
497
498/* Bits for "nfsd_flag" */
499#define NFSD_NEEDAUTH 0x04
500#define NFSD_AUTHFAIL 0x08
501
502#define NFSD_MAXFHSIZE 64
503typedef struct nfsrvfh {
504 size_t nsfh_size;
505 union {
506 fhandle_t u_fh;
507 uint8_t u_opaque[NFSD_MAXFHSIZE];
508 } nsfh_u;
509} nfsrvfh_t;
510#define NFSRVFH_SIZE(nsfh) ((nsfh)->nsfh_size)
511#define NFSRVFH_DATA(nsfh) ((nsfh)->nsfh_u.u_opaque)
512#define NFSRVFH_FHANDLE(nsfh) (&(nsfh)->nsfh_u.u_fh)
513
514/*
515 * This structure is used by the server for describing each request.
516 * Some fields are used only when write request gathering is performed.
517 */
518struct nfsrv_descript {
519 u_quad_t nd_time; /* Write deadline (usec) */
520 off_t nd_off; /* Start byte offset */
521 off_t nd_eoff; /* and end byte offset */
522 LIST_ENTRY(nfsrv_descript) nd_hash; /* Hash list */
523 LIST_ENTRY(nfsrv_descript) nd_tq; /* and timer list */
524 LIST_HEAD(,nfsrv_descript) nd_coalesce; /* coalesced writes */
525 SIMPLEQ_ENTRY(nfsrv_descript) nd_sendq; /* send reply list */
526 struct mbuf *nd_mrep; /* Request mbuf list */
527 struct mbuf *nd_md; /* Current dissect mbuf */
528 struct mbuf *nd_mreq; /* Reply mbuf list */
529 struct mbuf *nd_nam; /* and socket addr */
530 struct mbuf *nd_nam2; /* return socket addr */
531 void * nd_dpos; /* Current dissect pos */
532 u_int32_t nd_procnum; /* RPC # */
533 int nd_stable; /* storage type */
534 int nd_flag; /* nd_flag */
535 int nd_len; /* Length of this write */
536 int nd_repstat; /* Reply status */
537 u_int32_t nd_retxid; /* Reply xid */
538 u_int32_t nd_duration; /* Lease duration */
539 struct timeval nd_starttime; /* Time RPC initiated */
540 nfsrvfh_t nd_fh; /* File handle */
541 kauth_cred_t nd_cr; /* Credentials */
542};
543
544/* Bits for "nd_flag" */
545#define ND_READ 0x01 /* Check lease for readers */
546#define ND_WRITE 0x02 /* Check lease for modifiers */
547#define ND_CHECK 0x04
548#define ND_LEASE (ND_READ | ND_WRITE | ND_CHECK)
549#define ND_NFSV3 0x08
550#define ND_KERBNICK 0x20
551#define ND_KERBFULL 0x40
552#define ND_KERBAUTH (ND_KERBNICK | ND_KERBFULL)
553
554extern kmutex_t nfsd_lock;
555extern kcondvar_t nfsd_initcv;
556extern SLIST_HEAD(nfsdidlehead, nfsd) nfsd_idle_head;
557extern int nfsd_head_flag;
558#define NFSD_CHECKSLP 0x01
559
560extern struct mowner nfs_mowner;
561extern struct nfsstats nfsstats;
562extern int nfs_numasync;
563
564/*
565 * These macros compare nfsrv_descript structures.
566 */
567#define NFSW_CONTIG(o, n) \
568 ((o)->nd_eoff >= (n)->nd_off && \
569 !memcmp((void *)&(o)->nd_fh, (void *)&(n)->nd_fh, NFSX_V3FH))
570
571/*
572 * Defines for WebNFS
573 */
574
575#define WEBNFS_ESC_CHAR '%'
576#define WEBNFS_SPECCHAR_START 0x80
577
578#define WEBNFS_NATIVE_CHAR 0x80
579/*
580 * ..
581 * Possibly more here in the future.
582 */
583
584/*
585 * Macro for converting escape characters in WebNFS pathnames.
586 * Should really be in libkern.
587 */
588
589#define HEXTOC(c) \
590 ((c) >= 'a' ? ((c) - ('a' - 10)) : \
591 ((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
592#define HEXSTRTOI(p) \
593 ((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
594
595/*
596 * Structure holding information for a publicly exported filesystem
597 * (WebNFS). Currently the specs allow just for one such filesystem.
598 */
599struct nfs_public {
600 int np_valid; /* Do we hold valid information */
601 fhandle_t *np_handle; /* Filehandle for pub fs (internal) */
602 struct mount *np_mount; /* Mountpoint of exported fs */
603 char *np_index; /* Index file */
604};
605#endif /* _KERNEL */
606
607#endif /* _NFS_NFS_H */