2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)nfs_nqlease.c 8.9 (Berkeley) 5/20/95
37 * $FreeBSD: src/sys/nfs/nfs_nqlease.c,v 1.50 2000/02/13 03:32:05 peter Exp $
38 * $DragonFly: src/sys/vfs/nfs/Attic/nfs_nqlease.c,v 1.19 2004/10/12 19:21:01 dillon Exp $
44 * Cary G. Gray and David R. Cheriton, "Leases: An Efficient Fault-Tolerant
45 * Mechanism for Distributed File Cache Consistency",
46 * In Proc. of the Twelfth ACM Symposium on Operating Systems
47 * Principals, pg. 202-210, Litchfield Park, AZ, Dec. 1989.
48 * Michael N. Nelson, Brent B. Welch and John K. Ousterhout, "Caching
49 * in the Sprite Network File System", ACM TOCS 6(1),
50 * pages 134-154, February 1988.
51 * V. Srinivasan and Jeffrey C. Mogul, "Spritely NFS: Implementation and
52 * Performance of Cache-Consistency Protocols", Digital
53 * Equipment Corporation WRL Research Report 89/5, May 1989.
55 #include <sys/param.h>
56 #include <sys/vnode.h>
57 #include <sys/malloc.h>
58 #include <sys/mount.h>
59 #include <sys/kernel.h>
61 #include <sys/systm.h>
63 #include <sys/socket.h>
64 #include <sys/socketvar.h>
65 #include <sys/protosw.h>
67 #include <vm/vm_zone.h>
69 #include <netinet/in.h>
73 #include "nfsm_subs.h"
79 static MALLOC_DEFINE(M_NQMHOST, "NQNFS Host", "Nqnfs host address table");
81 time_t nqnfsstarttime = (time_t)0;
82 int nqsrv_clockskew = NQ_CLOCKSKEW;
83 int nqsrv_writeslack = NQ_WRITESLACK;
84 int nqsrv_maxlease = NQ_MAXLEASE;
86 static int nqsrv_maxnumlease = NQ_MAXNUMLEASE;
89 struct vop_lease_args;
92 static int nqsrv_cmpnam (struct nfssvc_sock *, struct sockaddr *,
94 static int nqnfs_vacated (struct vnode *vp, struct ucred *cred);
95 static void nqsrv_addhost (struct nqhost *lph, struct nfssvc_sock *slp,
96 struct sockaddr *nam);
97 static void nqsrv_instimeq (struct nqlease *lp, u_int32_t duration);
98 static void nqsrv_locklease (struct nqlease *lp);
99 static void nqsrv_send_eviction (struct vnode *vp, struct nqlease *lp,
100 struct nfssvc_sock *slp,
101 struct sockaddr *nam,
103 static void nqsrv_unlocklease (struct nqlease *lp);
104 static void nqsrv_waitfor_expiry (struct nqlease *lp);
106 extern void nqnfs_lease_updatetime (int deltat);
109 * Signifies which rpcs can have piggybacked lease requests
111 int nqnfs_piggy[NFS_NPROCS] = {
140 extern nfstype nfsv2_type[9];
141 extern nfstype nfsv3_type[9];
142 extern int nfsd_waiting;
143 extern struct nfsstats nfsstats;
150 * Get or check for a lease for "vp", based on ND_CHECK flag.
151 * The rules are as follows:
152 * - if a current non-caching lease, reply non-caching
153 * - if a current lease for same host only, extend lease
154 * - if a read cachable lease and a read lease request
155 * add host to list any reply cachable
156 * - else { set non-cachable for read-write sharing }
157 * send eviction notice messages to all other hosts that have lease
158 * wait for lease termination { either by receiving vacated messages
159 * from all the other hosts or expiry
161 * modify lease to non-cachable
162 * - else if no current lease, issue new one
164 * - return boolean TRUE iff nam should be m_freem()'d
165 * NB: Since nqnfs_serverd() is called from a timer, any potential tsleep()
166 * in here must be framed by nqsrv_locklease() and nqsrv_unlocklease().
167 * nqsrv_locklease() is coded such that at least one of LC_LOCKED and
168 * LC_WANTED is set whenever a process is tsleeping in it. The exception
169 * is when a new lease is being allocated, since it is not in the timer
170 * queue yet. (Ditto for the splsoftclock() and splx(s) calls)
173 nqsrv_getlease(struct vnode *vp, u_int32_t *duration, int flags,
174 struct nfssvc_sock *slp, struct thread *td,
175 struct sockaddr *nam, int *cachablep, u_quad_t *frev,
179 struct nqfhhashhead *lpp = NULL;
180 struct nqhost *lph = NULL;
187 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
189 if (*duration > nqsrv_maxlease)
190 *duration = nqsrv_maxlease;
191 error = VOP_GETATTR(vp, &vattr, td);
194 *frev = vattr.va_filerev;
197 if ((flags & ND_CHECK) == 0)
198 nfsstats.srvnqnfs_getleases++;
201 * Find the lease by searching the hash list.
203 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
204 error = VFS_VPTOFH(vp, &fh.fh_fid);
209 lpp = NQFHHASH(fh.fh_fid.fid_data);
210 for (lp = lpp->lh_first; lp != 0; lp = lp->lc_hash.le_next)
211 if (fh.fh_fsid.val[0] == lp->lc_fsid.val[0] &&
212 fh.fh_fsid.val[1] == lp->lc_fsid.val[1] &&
213 !bcmp(fh.fh_fid.fid_data, lp->lc_fiddata,
214 fh.fh_fid.fid_len - sizeof (int32_t))) {
224 if ((lp->lc_flag & LC_NONCACHABLE) ||
225 (lp->lc_morehosts == (struct nqm *)0 &&
226 nqsrv_cmpnam(slp, nam, &lp->lc_host)))
228 if ((flags & ND_READ) && (lp->lc_flag & LC_WRITE) == 0) {
229 if (flags & ND_CHECK)
231 if (nqsrv_cmpnam(slp, nam, &lp->lc_host))
234 if (lp->lc_morehosts) {
235 lph = lp->lc_morehosts->lpm_hosts;
236 lphp = &lp->lc_morehosts->lpm_next;
239 lphp = &lp->lc_morehosts;
242 while (ok && (lph->lph_flag & LC_VALID)) {
243 if (nqsrv_cmpnam(slp, nam, lph))
245 if (++i == LC_MOREHOSTSIZ) {
248 lph = (*lphp)->lpm_hosts;
249 lphp = &((*lphp)->lpm_next);
257 *lphp = (struct nqm *)
258 malloc(sizeof (struct nqm),
259 M_NQMHOST, M_WAITOK);
260 bzero((caddr_t)*lphp, sizeof (struct nqm));
261 lph = (*lphp)->lpm_hosts;
263 nqsrv_addhost(lph, slp, nam);
264 nqsrv_unlocklease(lp);
266 lp->lc_flag |= LC_NONCACHABLE;
268 nqsrv_send_eviction(vp, lp, slp, nam, cred);
269 nqsrv_waitfor_expiry(lp);
270 nqsrv_unlocklease(lp);
274 * Update the lease and return
276 if ((flags & ND_CHECK) == 0)
277 nqsrv_instimeq(lp, *duration);
278 if (lp->lc_flag & LC_NONCACHABLE)
282 if (flags & ND_WRITE)
283 lp->lc_flag |= LC_WRITTEN;
289 if (flags & ND_CHECK)
294 * The value of nqsrv_maxnumlease should be set generously, so that
295 * the following "printf" happens infrequently.
297 if (nfsstats.srvnqnfs_leases > nqsrv_maxnumlease) {
298 printf("Nqnfs server, too many leases\n");
300 (void) tsleep((caddr_t)&lbolt, 0, "nqsrvnuml", 0);
301 } while (nfsstats.srvnqnfs_leases > nqsrv_maxnumlease);
303 MALLOC(lp, struct nqlease *, sizeof (struct nqlease), M_NQLEASE, M_WAITOK);
304 bzero((caddr_t)lp, sizeof (struct nqlease));
305 if (flags & ND_WRITE)
306 lp->lc_flag |= (LC_WRITE | LC_WRITTEN);
307 nqsrv_addhost(&lp->lc_host, slp, nam);
309 lp->lc_fsid = fh.fh_fsid;
310 bcopy(fh.fh_fid.fid_data, lp->lc_fiddata,
311 fh.fh_fid.fid_len - sizeof (int32_t));
313 panic("nfs_nqlease.c: Phoney lpp");
314 LIST_INSERT_HEAD(lpp, lp, lc_hash);
317 nqsrv_instimeq(lp, *duration);
320 if (++nfsstats.srvnqnfs_leases > nfsstats.srvnqnfs_maxleases)
321 nfsstats.srvnqnfs_maxleases = nfsstats.srvnqnfs_leases;
326 * Local lease check for server syscalls.
327 * Just set up args and let nqsrv_getlease() do the rest.
328 * nqnfs_vop_lease_check() is the VOP_LEASE() form of the same routine.
329 * Ifdef'd code in nfsnode.h renames these routines to whatever a particular
333 nqnfs_lease_check(struct vnode *vp, struct thread *td,
334 struct ucred *cred, int flag)
336 u_int32_t duration = 0;
340 nqsrv_getlease(vp, &duration, ND_CHECK | flag, NQLOCALSLP,
341 td, (struct sockaddr *)0, &cache, &frev, cred);
346 * nqnfs_vop_lease_check(struct vnode *a_vp, struct thread *a_td,
347 * struct ucred *a_cred, int a_flag)
350 nqnfs_vop_lease_check(struct vop_lease_args *ap)
352 u_int32_t duration = 0;
356 (void) nqsrv_getlease(ap->a_vp, &duration, ND_CHECK | ap->a_flag,
357 NQLOCALSLP, ap->a_td, (struct sockaddr *)0,
358 &cache, &frev, ap->a_cred);
364 * Add a host to an nqhost structure for a lease.
367 nqsrv_addhost(struct nqhost *lph, struct nfssvc_sock *slp, struct sockaddr *nam)
369 struct sockaddr_in *saddr;
372 if (slp == NQLOCALSLP) {
373 lph->lph_flag |= (LC_VALID | LC_LOCAL);
378 if (nsso && nsso->so_proto->pr_protocol == IPPROTO_UDP) {
379 saddr = (struct sockaddr_in *)nam;
380 lph->lph_flag |= (LC_VALID | LC_UDP);
381 lph->lph_inetaddr = saddr->sin_addr.s_addr;
382 lph->lph_port = saddr->sin_port;
384 lph->lph_flag |= (LC_VALID | LC_SREF);
390 * Update the lease expiry time and position it in the timer queue correctly.
393 nqsrv_instimeq(struct nqlease *lp, u_int32_t duration)
398 newexpiry = time_second + duration + nqsrv_clockskew;
399 if (lp->lc_expiry == newexpiry)
401 if (lp->lc_timer.cqe_next != 0) {
402 CIRCLEQ_REMOVE(&nqtimerhead, lp, lc_timer);
404 lp->lc_expiry = newexpiry;
407 * Find where in the queue it should be.
409 tlp = nqtimerhead.cqh_last;
410 while (tlp != (void *)&nqtimerhead && tlp->lc_expiry > newexpiry)
411 tlp = tlp->lc_timer.cqe_prev;
413 if (tlp == nqtimerhead.cqh_last)
414 NQSTORENOVRAM(newexpiry);
415 #endif /* HASNVRAM */
416 if (tlp == (void *)&nqtimerhead) {
417 CIRCLEQ_INSERT_HEAD(&nqtimerhead, lp, lc_timer);
419 CIRCLEQ_INSERT_AFTER(&nqtimerhead, tlp, lp, lc_timer);
424 * Compare the requesting host address with the lph entry in the lease.
425 * Return true iff it is the same.
426 * This is somewhat messy due to the union in the nqhost structure.
427 * The local host is indicated by the special value of NQLOCALSLP for slp.
430 nqsrv_cmpnam(struct nfssvc_sock *slp, struct sockaddr *nam, struct nqhost *lph)
432 struct sockaddr_in *saddr;
433 struct sockaddr *addr;
434 union nethostaddr lhaddr;
438 if (slp == NQLOCALSLP) {
439 if (lph->lph_flag & LC_LOCAL)
445 if (nsso && nsso->so_proto->pr_protocol == IPPROTO_UDP) {
450 if (lph->lph_flag & LC_UDP) {
451 ret = netaddr_match(AF_INET, &lph->lph_haddr, addr);
453 if ((lph->lph_slp->ns_flag & SLP_VALID) == 0)
455 saddr = (struct sockaddr_in *)lph->lph_slp->ns_nam;
456 if (saddr->sin_family == AF_INET)
457 lhaddr.had_inetaddr = saddr->sin_addr.s_addr;
459 lhaddr.had_nam = lph->lph_slp->ns_nam;
460 ret = netaddr_match(saddr->sin_family, &lhaddr, addr);
466 * Send out eviction notice messages to all other hosts for the lease.
469 nqsrv_send_eviction(struct vnode *vp, struct nqlease *lp,
470 struct nfssvc_sock *slp, struct sockaddr *nam,
473 struct nqhost *lph = &lp->lc_host;
475 struct nqm *lphnext = lp->lc_morehosts;
476 struct mbuf *m, *mreq, *mb, *mb2, *mheadend;
477 struct sockaddr *nam2;
478 struct sockaddr_in *saddr;
483 int len = 1, ok = 1, i = 0;
485 while (ok && (lph->lph_flag & LC_VALID)) {
486 if (nqsrv_cmpnam(slp, nam, lph)) {
487 lph->lph_flag |= LC_VACATED;
488 } else if ((lph->lph_flag & (LC_LOCAL | LC_VACATED)) == 0) {
493 so = lph->lph_slp->ns_so;
494 if (lph->lph_flag & LC_UDP) {
495 MALLOC(nam2, struct sockaddr *,
496 sizeof *nam2, M_SONAME, M_WAITOK);
497 saddr = (struct sockaddr_in *)nam2;
498 saddr->sin_len = sizeof *saddr;
499 saddr->sin_family = AF_INET;
500 saddr->sin_addr.s_addr = lph->lph_inetaddr;
501 saddr->sin_port = lph->lph_port;
502 } else if (lph->lph_slp->ns_flag & SLP_VALID) {
503 nam2 = (struct sockaddr *)0;
507 sotype = so->so_type;
508 if (so->so_proto->pr_flags & PR_CONNREQUIRED)
509 solockp = &lph->lph_slp->ns_solock;
510 nfsm_reqhead((struct vnode *)0, NQNFSPROC_EVICTED,
511 NFSX_V3FH + NFSX_UNSIGNED);
512 fhp = &nfh.fh_generic;
513 bzero((caddr_t)fhp, sizeof(nfh));
514 fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
515 VFS_VPTOFH(vp, &fhp->fh_fid);
516 nfsm_srvfhtom(fhp, 1);
523 if (siz <= 0 || siz > NFS_MAXPACKET) {
524 printf("mbuf siz=%d\n",siz);
525 panic("Bad nfs svc reply");
527 m = nfsm_rpchead(cred, (NFSMNT_NFSV3 | NFSMNT_NQNFS),
529 RPCAUTH_UNIX, 5 * NFSX_UNSIGNED, (char *)0,
530 0, (char *)NULL, mreq, siz, &mheadend, &xid);
532 * For stream protocols, prepend a Sun RPC
535 if (sotype == SOCK_STREAM) {
536 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
538 printf("nfs_nqlease: M_PREPEND failed\n");
539 *mtod(m, u_int32_t *) = htonl(0x80000000 |
540 (m->m_pkthdr.len - NFSX_UNSIGNED));
543 * nfs_sndlock if PR_CONNREQUIRED XXX
546 if ((lph->lph_flag & LC_UDP) == 0 &&
547 ((lph->lph_slp->ns_flag & SLP_VALID) == 0 ||
548 nfs_slplock(lph->lph_slp, 0) == 0)) {
551 (void) nfs_send(so, nam2, m,
554 nfs_slpunlock(lph->lph_slp);
556 if (lph->lph_flag & LC_UDP)
557 FREE(nam2, M_SONAME);
563 len = LC_MOREHOSTSIZ;
564 lph = lphnext->lpm_hosts;
565 lphnext = lphnext->lpm_next;
574 * Wait for the lease to expire.
575 * This will occur when all clients have sent "vacated" messages to
576 * this server OR when it expires do to timeout.
579 nqsrv_waitfor_expiry(struct nqlease *lp)
587 if (time_second > lp->lc_expiry)
590 lphnext = lp->lc_morehosts;
594 while (ok && (lph->lph_flag & LC_VALID)) {
595 if ((lph->lph_flag & (LC_LOCAL | LC_VACATED)) == 0) {
596 lp->lc_flag |= LC_EXPIREDWANTED;
597 (void) tsleep((caddr_t)&lp->lc_flag, 0, "nqexp", 0);
603 len = LC_MOREHOSTSIZ;
604 lph = lphnext->lpm_hosts;
605 lphnext = lphnext->lpm_next;
614 * Nqnfs server timer that maintains the server lease queue.
615 * Scan the lease queue for expired entries:
616 * - when one is found, wakeup anyone waiting for it
617 * else dequeue and free
624 struct nqlease *nextlp;
625 struct nqm *lphnext, *olphnext;
628 for (lp = nqtimerhead.cqh_first; lp != (void *)&nqtimerhead;
630 if (lp->lc_expiry >= time_second)
632 nextlp = lp->lc_timer.cqe_next;
633 if (lp->lc_flag & LC_EXPIREDWANTED) {
634 lp->lc_flag &= ~LC_EXPIREDWANTED;
635 wakeup((caddr_t)&lp->lc_flag);
636 } else if ((lp->lc_flag & (LC_LOCKED | LC_WANTED)) == 0) {
638 * Make a best effort at keeping a write caching lease long
639 * enough by not deleting it until it has been explicitly
640 * vacated or there have been no writes in the previous
641 * write_slack seconds since expiry and the nfsds are not
642 * all busy. The assumption is that if the nfsds are not
643 * all busy now (no queue of nfs requests), then the client
644 * would have been able to do at least one write to the
645 * file during the last write_slack seconds if it was still
646 * trying to push writes to the server.
648 if ((lp->lc_flag & (LC_WRITE | LC_VACATED)) == LC_WRITE &&
649 ((lp->lc_flag & LC_WRITTEN) || nfsd_waiting == 0)) {
650 lp->lc_flag &= ~LC_WRITTEN;
651 nqsrv_instimeq(lp, nqsrv_writeslack);
653 CIRCLEQ_REMOVE(&nqtimerhead, lp, lc_timer);
654 LIST_REMOVE(lp, lc_hash);
656 * This soft reference may no longer be valid, but
657 * no harm done. The worst case is if the vnode was
658 * recycled and has another valid lease reference,
659 * which is dereferenced prematurely.
661 lp->lc_vp->v_lease = (struct nqlease *)0;
663 lphnext = lp->lc_morehosts;
664 olphnext = (struct nqm *)0;
668 while (ok && (lph->lph_flag & LC_VALID)) {
669 if (lph->lph_flag & LC_SREF)
670 nfsrv_slpderef(lph->lph_slp);
673 free((caddr_t)olphnext, M_NQMHOST);
674 olphnext = (struct nqm *)0;
679 len = LC_MOREHOSTSIZ;
680 lph = lphnext->lpm_hosts;
681 lphnext = lphnext->lpm_next;
687 FREE((caddr_t)lp, M_NQLEASE);
689 free((caddr_t)olphnext, M_NQMHOST);
690 nfsstats.srvnqnfs_leases--;
697 * Called from nfssvc_nfsd() for a getlease rpc request.
698 * Do the from/to xdr translation and call nqsrv_getlease() to
702 nqnfsrv_getlease(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
703 struct thread *td, struct mbuf **mrq)
705 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
706 struct sockaddr *nam = nfsd->nd_nam;
707 caddr_t dpos = nfsd->nd_dpos;
708 struct ucred *cred = &nfsd->nd_cr;
709 struct nfs_fattr *fp;
711 struct vattr *vap = &va;
721 struct mbuf *mb, *mb2, *mreq;
722 int flags, rdonly, cache;
724 fhp = &nfh.fh_generic;
726 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
727 flags = fxdr_unsigned(int, *tl++);
728 nfsd->nd_duration = fxdr_unsigned(int, *tl);
729 error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly,
730 (nfsd->nd_flag & ND_KERBAUTH), TRUE);
735 if (rdonly && flags == ND_WRITE) {
740 (void) nqsrv_getlease(vp, &nfsd->nd_duration, flags, slp, td,
741 nam, &cache, &frev, cred);
742 error = VOP_GETATTR(vp, vap, td);
744 nfsm_reply(NFSX_V3FATTR + 4 * NFSX_UNSIGNED);
745 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
746 *tl++ = txdr_unsigned(cache);
747 *tl++ = txdr_unsigned(nfsd->nd_duration);
748 txdr_hyper(frev, tl);
749 nfsm_build(fp, struct nfs_fattr *, NFSX_V3FATTR);
750 nfsm_srvfillattr(vap, fp);
755 * Called from nfssvc_nfsd() when a "vacated" message is received from a
756 * client. Find the entry and expire it.
759 nqnfsrv_vacated(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
760 struct thread *td, struct mbuf **mrq)
762 struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
763 struct sockaddr *nam = nfsd->nd_nam;
764 caddr_t dpos = nfsd->nd_dpos;
767 struct nqlease *tlp = (struct nqlease *)0;
773 struct mbuf *mreq, *mb;
774 int error = 0, i, len, ok, gotit = 0, cache = 0;
778 fhp = &nfh.fh_generic;
782 * Find the lease by searching the hash list.
784 for (lp = NQFHHASH(fhp->fh_fid.fid_data)->lh_first; lp != 0;
785 lp = lp->lc_hash.le_next)
786 if (fhp->fh_fsid.val[0] == lp->lc_fsid.val[0] &&
787 fhp->fh_fsid.val[1] == lp->lc_fsid.val[1] &&
788 !bcmp(fhp->fh_fid.fid_data, lp->lc_fiddata,
799 lphnext = lp->lc_morehosts;
801 while (ok && (lph->lph_flag & LC_VALID)) {
802 if (nqsrv_cmpnam(slp, nam, lph)) {
803 lph->lph_flag |= LC_VACATED;
809 len = LC_MOREHOSTSIZ;
811 lph = lphnext->lpm_hosts;
812 lphnext = lphnext->lpm_next;
818 if ((lp->lc_flag & LC_EXPIREDWANTED) && gotit) {
819 lp->lc_flag &= ~LC_EXPIREDWANTED;
820 wakeup((caddr_t)&lp->lc_flag);
828 #endif /* NFS_NOSERVER */
831 * Client get lease rpc function.
834 nqnfs_getlease(struct vnode *vp, int rwflag, struct thread *td)
840 struct nfsmount *nmp = VFSTONFS(vp->v_mount);
841 caddr_t bpos, dpos, cp2;
844 struct mbuf *mreq, *mrep, *md, *mb, *mb2;
848 nfsstats.rpccnt[NQNFSPROC_GETLEASE]++;
849 mb = mreq = nfsm_reqh(vp, NQNFSPROC_GETLEASE, NFSX_V3FH+2*NFSX_UNSIGNED,
852 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
853 *tl++ = txdr_unsigned(rwflag);
854 *tl = txdr_unsigned(nmp->nm_leaseterm);
855 reqtime = time_second;
856 nfsm_request(vp, NQNFSPROC_GETLEASE, td, nfs_vpcred(vp, rwflag));
858 nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
859 cachable = fxdr_unsigned(int, *tl++);
860 reqtime += fxdr_unsigned(int, *tl++);
861 if (reqtime > time_second) {
862 frev = fxdr_hyper(tl);
863 nqnfs_clientlease(nmp, np, rwflag, cachable, reqtime, frev);
864 nfsm_loadattr(vp, (struct vattr *)0);
866 error = NQNFS_EXPIRED;
875 * Client vacated message function.
878 nqnfs_vacated(struct vnode *vp, struct ucred *cred)
887 struct mbuf *m, *mreq, *mb, *mb2, *mheadend;
888 struct nfsmount *nmp;
891 nmp = VFSTONFS(vp->v_mount);
892 nfsstats.rpccnt[NQNFSPROC_VACATED]++;
893 nfsm_reqhead(vp, NQNFSPROC_VACATED, NFSX_FH(1));
901 m = nfsm_rpchead(cred, nmp->nm_flag, NQNFSPROC_VACATED,
902 RPCAUTH_UNIX, 5 * NFSX_UNSIGNED, (char *)0,
903 0, (char *)NULL, mreq, i, &mheadend, &xid);
904 if (nmp->nm_sotype == SOCK_STREAM) {
905 M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT);
908 *mtod(m, u_int32_t *) = htonl(0x80000000 | (m->m_pkthdr.len -
914 if (nmp->nm_soflags & PR_CONNREQUIRED)
915 (void) nfs_sndlock(&myrep);
916 (void) nfs_send(nmp->nm_so, nmp->nm_nam, m, &myrep);
917 if (nmp->nm_soflags & PR_CONNREQUIRED)
918 nfs_sndunlock(&myrep);
924 * Called for client side callbacks
927 nqnfs_callback(struct nfsmount *nmp, struct mbuf *mrep, struct mbuf *md,
937 struct nfssvc_sock *slp;
938 struct nfsrv_descript ndesc;
939 struct nfsrv_descript *nfsd = &ndesc;
940 struct mbuf **mrq = (struct mbuf **)0, *mb, *mreq;
941 int error = 0, cache = 0;
948 nfsd->nd_mrep = mrep;
950 nfsd->nd_dpos = dpos;
951 error = nfs_getreq(nfsd, &tnfsd, FALSE);
955 dpos = nfsd->nd_dpos;
956 if (nfsd->nd_procnum != NQNFSPROC_EVICTED) {
960 fhp = &nfh.fh_generic;
963 error = nfs_nget(nmp->nm_mountp, (nfsfh_t *)fhp, NFSX_V3FH, &np);
967 if (np->n_timer.cqe_next != 0) {
969 np->n_flag |= NQNFSEVICTED;
970 if (nmp->nm_timerhead.cqh_first != np) {
971 CIRCLEQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
972 CIRCLEQ_INSERT_HEAD(&nmp->nm_timerhead, np, n_timer);
981 * Nqnfs client helper daemon. Runs once a second to expire leases.
982 * It also get authorization strings for "kerb" mounts.
983 * It must start at the beginning of the list again after any potential
984 * "sleep" since nfs_reclaim() called from vclean() can pull a node off
985 * the list asynchronously.
988 nqnfs_clientd(struct nfsmount *nmp, struct ucred *cred, struct nfsd_cargs *ncd,
989 int flag, caddr_t argp, struct thread *td)
994 struct nfsuid *nuidp, *nnuidp;
998 * First initialize some variables
1002 * If an authorization string is being passed in, get it.
1004 if ((flag & NFSSVC_GOTAUTH) &&
1005 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT)) == 0) {
1006 if (nmp->nm_state & NFSSTA_HASAUTH)
1008 if ((flag & NFSSVC_AUTHINFAIL) == 0) {
1009 if (ncd->ncd_authlen <= nmp->nm_authlen &&
1010 ncd->ncd_verflen <= nmp->nm_verflen &&
1011 !copyin(ncd->ncd_authstr,nmp->nm_authstr,ncd->ncd_authlen)&&
1012 !copyin(ncd->ncd_verfstr,nmp->nm_verfstr,ncd->ncd_verflen)){
1013 nmp->nm_authtype = ncd->ncd_authtype;
1014 nmp->nm_authlen = ncd->ncd_authlen;
1015 nmp->nm_verflen = ncd->ncd_verflen;
1017 nmp->nm_key = ncd->ncd_key;
1020 nmp->nm_state |= NFSSTA_AUTHERR;
1022 nmp->nm_state |= NFSSTA_AUTHERR;
1023 nmp->nm_state |= NFSSTA_HASAUTH;
1024 wakeup((caddr_t)&nmp->nm_authlen);
1026 nmp->nm_state |= NFSSTA_WAITAUTH;
1029 * Loop every second updating queue until there is a termination sig.
1031 while ((nmp->nm_state & NFSSTA_DISMNT) == 0) {
1032 if (nmp->nm_flag & NFSMNT_NQNFS) {
1034 * If there are no outstanding requests (and therefore no
1035 * processes in nfs_reply) and there is data in the receive
1036 * queue, poke for callbacks.
1038 if (TAILQ_EMPTY(&nfs_reqq) && nmp->nm_so &&
1039 nmp->nm_so->so_rcv.sb_cc > 0) {
1040 myrep.r_flags = R_GETONEREP;
1042 myrep.r_mrep = (struct mbuf *)0;
1048 * Loop through the leases, updating as required.
1050 np = nmp->nm_timerhead.cqh_first;
1051 while (np != (void *)&nmp->nm_timerhead &&
1052 (nmp->nm_state & NFSSTA_DISMINPROG) == 0) {
1055 if (np->n_expiry < time_second) {
1056 if (vget(vp, LK_EXCLUSIVE, td) == 0) {
1057 nmp->nm_inprog = vp;
1058 if (vpid == vp->v_id) {
1059 CIRCLEQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
1060 np->n_timer.cqe_next = 0;
1061 if (np->n_flag & (NMODIFIED | NQNFSEVICTED)) {
1062 if (np->n_flag & NQNFSEVICTED) {
1063 if (vp->v_type == VDIR)
1066 (void) nfs_vinvalbuf(vp,
1068 np->n_flag &= ~NQNFSEVICTED;
1069 (void) nqnfs_vacated(vp, cred);
1070 } else if (vp->v_type == VREG) {
1071 (void) VOP_FSYNC(vp, MNT_WAIT, td);
1072 np->n_flag &= ~NMODIFIED;
1077 nmp->nm_inprog = NULLVP;
1079 } else if ((np->n_expiry - NQ_RENEWAL) < time_second) {
1080 if ((np->n_flag & (NQNFSWRITE | NQNFSNONCACHE))
1082 !TAILQ_EMPTY(&vp->v_dirtyblkhd) &&
1083 vget(vp, LK_EXCLUSIVE, td) == 0) {
1084 nmp->nm_inprog = vp;
1085 if (vpid == vp->v_id &&
1086 nqnfs_getlease(vp, ND_WRITE, td)==0)
1087 np->n_brev = np->n_lrev;
1089 nmp->nm_inprog = NULLVP;
1093 if (np == nmp->nm_timerhead.cqh_first)
1095 np = nmp->nm_timerhead.cqh_first;
1100 * Get an authorization string, if required.
1102 if ((nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT | NFSSTA_HASAUTH)) == 0) {
1103 ncd->ncd_authuid = nmp->nm_authuid;
1104 if (copyout((caddr_t)ncd, argp, sizeof (struct nfsd_cargs)))
1105 nmp->nm_state |= NFSSTA_WAITAUTH;
1111 * Wait a bit (no pun) and do it again.
1113 if ((nmp->nm_state & NFSSTA_DISMNT) == 0 &&
1114 (nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_HASAUTH))) {
1115 error = tsleep((caddr_t)&nmp->nm_authstr, PCATCH,
1116 "nqnfstimr", hz / 3);
1117 if (error == EINTR || error == ERESTART)
1118 (void) dounmount(nmp->nm_mountp, 0, td);
1123 * Finally, we can free up the mount structure.
1125 TAILQ_FOREACH_MUTABLE(nuidp, &nmp->nm_uidlruhead, nu_lru, nnuidp) {
1126 LIST_REMOVE(nuidp, nu_hash);
1127 TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
1128 free((caddr_t)nuidp, M_NFSUID);
1130 nfs_free_mount(nmp);
1131 if (error == EWOULDBLOCK)
1136 #endif /* NFS_NOSERVER */
1139 * Adjust all timer queue expiry times when the time of day clock is changed.
1140 * Called from the settimeofday() syscall.
1143 nqnfs_lease_updatetime(int deltat)
1145 struct thread *td = curthread; /* XXX */
1148 struct mount *mp, *nxtmp;
1149 struct nfsmount *nmp;
1153 if (nqnfsstarttime != 0)
1154 nqnfsstarttime += deltat;
1156 for (lp = nqtimerhead.cqh_first; lp != (void *)&nqtimerhead;
1157 lp = lp->lc_timer.cqe_next)
1158 lp->lc_expiry += deltat;
1162 * Search the mount list for all nqnfs mounts and do their timer
1165 lwkt_gettoken(&ilock, &mountlist_token);
1166 for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nxtmp) {
1167 if (vfs_busy(mp, LK_NOWAIT, &ilock, td)) {
1168 nxtmp = TAILQ_NEXT(mp, mnt_list);
1171 if (mp->mnt_stat.f_type == nfs_mount_type) {
1173 if (nmp->nm_flag & NFSMNT_NQNFS) {
1174 for (np = nmp->nm_timerhead.cqh_first;
1175 np != (void *)&nmp->nm_timerhead;
1176 np = np->n_timer.cqe_next) {
1177 np->n_expiry += deltat;
1181 lwkt_gettokref(&ilock);
1182 nxtmp = TAILQ_NEXT(mp, mnt_list);
1185 lwkt_reltoken(&ilock);
1188 #ifndef NFS_NOSERVER
1190 * Lock a server lease.
1193 nqsrv_locklease(struct nqlease *lp)
1196 while (lp->lc_flag & LC_LOCKED) {
1197 lp->lc_flag |= LC_WANTED;
1198 (void) tsleep((caddr_t)lp, 0, "nqlc", 0);
1200 lp->lc_flag |= LC_LOCKED;
1201 lp->lc_flag &= ~LC_WANTED;
1205 * Unlock a server lease.
1208 nqsrv_unlocklease(struct nqlease *lp)
1211 lp->lc_flag &= ~LC_LOCKED;
1212 if (lp->lc_flag & LC_WANTED)
1213 wakeup((caddr_t)lp);
1215 #endif /* NFS_NOSERVER */
1218 * Update a client lease.
1221 nqnfs_clientlease(struct nfsmount *nmp, struct nfsnode *np, int rwflag,
1222 int cachable, time_t expiry, u_quad_t frev)
1226 if (np->n_timer.cqe_next != 0) {
1227 CIRCLEQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
1228 if (rwflag == ND_WRITE)
1229 np->n_flag |= NQNFSWRITE;
1230 } else if (rwflag == ND_READ)
1231 np->n_flag &= ~NQNFSWRITE;
1233 np->n_flag |= NQNFSWRITE;
1235 np->n_flag &= ~NQNFSNONCACHE;
1237 np->n_flag |= NQNFSNONCACHE;
1238 np->n_expiry = expiry;
1240 tp = nmp->nm_timerhead.cqh_last;
1241 while (tp != (void *)&nmp->nm_timerhead && tp->n_expiry > np->n_expiry)
1242 tp = tp->n_timer.cqe_prev;
1243 if (tp == (void *)&nmp->nm_timerhead) {
1244 CIRCLEQ_INSERT_HEAD(&nmp->nm_timerhead, np, n_timer);
1246 CIRCLEQ_INSERT_AFTER(&nmp->nm_timerhead, tp, np, n_timer);