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fb919e4d5a
other "system" header files. Also help the deprecation of lockmgr.h by making it a sub-include of sys/lock.h and removing sys/lockmgr.h form kernel .c files. Sort sys/*.h includes where possible in affected files. OK'ed by: bde (with reservations)
1289 lines
33 KiB
C
1289 lines
33 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfs_nqlease.c 8.9 (Berkeley) 5/20/95
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* $FreeBSD$
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*/
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/*
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* References:
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* Cary G. Gray and David R. Cheriton, "Leases: An Efficient Fault-Tolerant
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* Mechanism for Distributed File Cache Consistency",
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* In Proc. of the Twelfth ACM Symposium on Operating Systems
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* Principals, pg. 202-210, Litchfield Park, AZ, Dec. 1989.
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* Michael N. Nelson, Brent B. Welch and John K. Ousterhout, "Caching
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* in the Sprite Network File System", ACM TOCS 6(1),
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* pages 134-154, February 1988.
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* V. Srinivasan and Jeffrey C. Mogul, "Spritely NFS: Implementation and
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* Performance of Cache-Consistency Protocols", Digital
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* Equipment Corporation WRL Research Report 89/5, May 1989.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/vnode.h>
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#include <vm/vm_zone.h>
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#include <machine/mutex.h>
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#include <netinet/in.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <nfs/nfsm_subs.h>
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#include <nfs/xdr_subs.h>
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#include <nfs/nqnfs.h>
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#include <nfs/nfsnode.h>
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#include <nfs/nfsmount.h>
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static MALLOC_DEFINE(M_NQMHOST, "NQNFS Host", "Nqnfs host address table");
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time_t nqnfsstarttime = (time_t)0;
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int nqsrv_clockskew = NQ_CLOCKSKEW;
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int nqsrv_writeslack = NQ_WRITESLACK;
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int nqsrv_maxlease = NQ_MAXLEASE;
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#ifndef NFS_NOSERVER
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static int nqsrv_maxnumlease = NQ_MAXNUMLEASE;
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#endif
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struct vop_lease_args;
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#ifndef NFS_NOSERVER
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static int nqsrv_cmpnam __P((struct nfssvc_sock *, struct sockaddr *,
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struct nqhost *));
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static int nqnfs_vacated __P((struct vnode *vp, struct ucred *cred));
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static void nqsrv_addhost __P((struct nqhost *lph, struct nfssvc_sock *slp,
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struct sockaddr *nam));
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static void nqsrv_instimeq __P((struct nqlease *lp, u_int32_t duration));
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static void nqsrv_locklease __P((struct nqlease *lp));
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static void nqsrv_send_eviction __P((struct vnode *vp, struct nqlease *lp,
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struct nfssvc_sock *slp,
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struct sockaddr *nam,
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struct ucred *cred));
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static void nqsrv_unlocklease __P((struct nqlease *lp));
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static void nqsrv_waitfor_expiry __P((struct nqlease *lp));
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#endif
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extern void nqnfs_lease_updatetime __P((int deltat));
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/*
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* Signifies which rpcs can have piggybacked lease requests
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*/
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int nqnfs_piggy[NFS_NPROCS] = {
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0,
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0,
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ND_WRITE,
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ND_READ,
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0,
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ND_READ,
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ND_READ,
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ND_WRITE,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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ND_READ,
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ND_READ,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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0,
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};
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extern nfstype nfsv2_type[9];
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extern nfstype nfsv3_type[9];
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extern int nfsd_waiting;
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extern struct nfsstats nfsstats;
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#define TRUE 1
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#define FALSE 0
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#ifndef NFS_NOSERVER
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/*
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* Get or check for a lease for "vp", based on ND_CHECK flag.
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* The rules are as follows:
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* - if a current non-caching lease, reply non-caching
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* - if a current lease for same host only, extend lease
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* - if a read cachable lease and a read lease request
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* add host to list any reply cachable
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* - else { set non-cachable for read-write sharing }
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* send eviction notice messages to all other hosts that have lease
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* wait for lease termination { either by receiving vacated messages
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* from all the other hosts or expiry
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* via. timeout }
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* modify lease to non-cachable
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* - else if no current lease, issue new one
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* - reply
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* - return boolean TRUE iff nam should be m_freem()'d
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* NB: Since nqnfs_serverd() is called from a timer, any potential tsleep()
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* in here must be framed by nqsrv_locklease() and nqsrv_unlocklease().
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* nqsrv_locklease() is coded such that at least one of LC_LOCKED and
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* LC_WANTED is set whenever a process is tsleeping in it. The exception
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* is when a new lease is being allocated, since it is not in the timer
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* queue yet. (Ditto for the splsoftclock() and splx(s) calls)
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*/
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int
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nqsrv_getlease(vp, duration, flags, slp, procp, nam, cachablep, frev, cred)
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struct vnode *vp;
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u_int32_t *duration;
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int flags;
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struct nfssvc_sock *slp;
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struct proc *procp;
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struct sockaddr *nam;
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int *cachablep;
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u_quad_t *frev;
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struct ucred *cred;
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{
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register struct nqlease *lp;
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register struct nqfhhashhead *lpp = NULL;
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register struct nqhost *lph = NULL;
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struct nqlease *tlp;
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struct nqm **lphp;
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struct vattr vattr;
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fhandle_t fh;
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int i, ok, error, s;
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if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
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return (0);
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if (*duration > nqsrv_maxlease)
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*duration = nqsrv_maxlease;
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error = VOP_GETATTR(vp, &vattr, cred, procp);
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if (error)
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return (error);
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*frev = vattr.va_filerev;
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s = splsoftclock();
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tlp = vp->v_lease;
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if ((flags & ND_CHECK) == 0)
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nfsstats.srvnqnfs_getleases++;
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if (tlp == 0) {
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/*
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* Find the lease by searching the hash list.
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*/
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fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid;
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error = VFS_VPTOFH(vp, &fh.fh_fid);
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if (error) {
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splx(s);
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return (error);
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}
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lpp = NQFHHASH(fh.fh_fid.fid_data);
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for (lp = lpp->lh_first; lp != 0; lp = lp->lc_hash.le_next)
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if (fh.fh_fsid.val[0] == lp->lc_fsid.val[0] &&
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fh.fh_fsid.val[1] == lp->lc_fsid.val[1] &&
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!bcmp(fh.fh_fid.fid_data, lp->lc_fiddata,
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fh.fh_fid.fid_len - sizeof (int32_t))) {
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/* Found it */
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lp->lc_vp = vp;
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vp->v_lease = lp;
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tlp = lp;
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break;
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}
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} else
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lp = tlp;
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if (lp != 0) {
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if ((lp->lc_flag & LC_NONCACHABLE) ||
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(lp->lc_morehosts == (struct nqm *)0 &&
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nqsrv_cmpnam(slp, nam, &lp->lc_host)))
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goto doreply;
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if ((flags & ND_READ) && (lp->lc_flag & LC_WRITE) == 0) {
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if (flags & ND_CHECK)
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goto doreply;
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if (nqsrv_cmpnam(slp, nam, &lp->lc_host))
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goto doreply;
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i = 0;
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if (lp->lc_morehosts) {
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lph = lp->lc_morehosts->lpm_hosts;
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lphp = &lp->lc_morehosts->lpm_next;
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ok = 1;
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} else {
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lphp = &lp->lc_morehosts;
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ok = 0;
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}
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while (ok && (lph->lph_flag & LC_VALID)) {
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if (nqsrv_cmpnam(slp, nam, lph))
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goto doreply;
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if (++i == LC_MOREHOSTSIZ) {
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i = 0;
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if (*lphp) {
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lph = (*lphp)->lpm_hosts;
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lphp = &((*lphp)->lpm_next);
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} else
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ok = 0;
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} else
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lph++;
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}
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nqsrv_locklease(lp);
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if (!ok) {
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*lphp = (struct nqm *)
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malloc(sizeof (struct nqm),
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M_NQMHOST, M_WAITOK | M_ZERO);
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lph = (*lphp)->lpm_hosts;
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}
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nqsrv_addhost(lph, slp, nam);
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nqsrv_unlocklease(lp);
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} else {
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lp->lc_flag |= LC_NONCACHABLE;
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nqsrv_locklease(lp);
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nqsrv_send_eviction(vp, lp, slp, nam, cred);
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nqsrv_waitfor_expiry(lp);
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nqsrv_unlocklease(lp);
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}
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doreply:
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/*
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* Update the lease and return
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*/
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if ((flags & ND_CHECK) == 0)
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nqsrv_instimeq(lp, *duration);
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if (lp->lc_flag & LC_NONCACHABLE)
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*cachablep = 0;
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else {
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*cachablep = 1;
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if (flags & ND_WRITE)
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lp->lc_flag |= LC_WRITTEN;
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}
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splx(s);
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return (0);
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}
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splx(s);
|
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if (flags & ND_CHECK)
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return (0);
|
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|
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/*
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* Allocate new lease
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* The value of nqsrv_maxnumlease should be set generously, so that
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* the following "printf" happens infrequently.
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*/
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if (nfsstats.srvnqnfs_leases > nqsrv_maxnumlease) {
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printf("Nqnfs server, too many leases\n");
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do {
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(void) tsleep((caddr_t)&lbolt, PSOCK,
|
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"nqsrvnuml", 0);
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} while (nfsstats.srvnqnfs_leases > nqsrv_maxnumlease);
|
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}
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MALLOC(lp, struct nqlease *, sizeof (struct nqlease), M_NQLEASE,
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M_WAITOK | M_ZERO);
|
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if (flags & ND_WRITE)
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lp->lc_flag |= (LC_WRITE | LC_WRITTEN);
|
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nqsrv_addhost(&lp->lc_host, slp, nam);
|
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lp->lc_vp = vp;
|
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lp->lc_fsid = fh.fh_fsid;
|
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bcopy(fh.fh_fid.fid_data, lp->lc_fiddata,
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fh.fh_fid.fid_len - sizeof (int32_t));
|
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if(!lpp)
|
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panic("nfs_nqlease.c: Phoney lpp");
|
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LIST_INSERT_HEAD(lpp, lp, lc_hash);
|
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vp->v_lease = lp;
|
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s = splsoftclock();
|
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nqsrv_instimeq(lp, *duration);
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splx(s);
|
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*cachablep = 1;
|
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if (++nfsstats.srvnqnfs_leases > nfsstats.srvnqnfs_maxleases)
|
|
nfsstats.srvnqnfs_maxleases = nfsstats.srvnqnfs_leases;
|
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return (0);
|
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}
|
|
|
|
/*
|
|
* Local lease check for server syscalls.
|
|
* Just set up args and let nqsrv_getlease() do the rest.
|
|
* nqnfs_vop_lease_check() is the VOP_LEASE() form of the same routine.
|
|
* Ifdef'd code in nfsnode.h renames these routines to whatever a particular
|
|
* OS needs.
|
|
*/
|
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void
|
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nqnfs_lease_check(vp, p, cred, flag)
|
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struct vnode *vp;
|
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struct proc *p;
|
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struct ucred *cred;
|
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int flag;
|
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{
|
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u_int32_t duration = 0;
|
|
int cache;
|
|
u_quad_t frev;
|
|
|
|
(void) nqsrv_getlease(vp, &duration, ND_CHECK | flag, NQLOCALSLP,
|
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p, (struct sockaddr *)0, &cache, &frev, cred);
|
|
}
|
|
|
|
int
|
|
nqnfs_vop_lease_check(ap)
|
|
struct vop_lease_args /* {
|
|
struct vnode *a_vp;
|
|
struct proc *a_p;
|
|
struct ucred *a_cred;
|
|
int a_flag;
|
|
} */ *ap;
|
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{
|
|
u_int32_t duration = 0;
|
|
int cache;
|
|
u_quad_t frev;
|
|
|
|
(void) nqsrv_getlease(ap->a_vp, &duration, ND_CHECK | ap->a_flag,
|
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NQLOCALSLP, ap->a_p, (struct sockaddr *)0,
|
|
&cache, &frev, ap->a_cred);
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Add a host to an nqhost structure for a lease.
|
|
*/
|
|
static void
|
|
nqsrv_addhost(lph, slp, nam)
|
|
register struct nqhost *lph;
|
|
struct nfssvc_sock *slp;
|
|
struct sockaddr *nam;
|
|
{
|
|
struct sockaddr_in *saddr;
|
|
struct socket *nsso;
|
|
|
|
if (slp == NQLOCALSLP) {
|
|
lph->lph_flag |= (LC_VALID | LC_LOCAL);
|
|
return;
|
|
}
|
|
nsso = slp->ns_so;
|
|
lph->lph_slp = slp;
|
|
if (nsso && nsso->so_proto->pr_protocol == IPPROTO_UDP) {
|
|
saddr = (struct sockaddr_in *)nam;
|
|
lph->lph_flag |= (LC_VALID | LC_UDP);
|
|
lph->lph_inetaddr = saddr->sin_addr.s_addr;
|
|
lph->lph_port = saddr->sin_port;
|
|
} else {
|
|
lph->lph_flag |= (LC_VALID | LC_SREF);
|
|
slp->ns_sref++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Update the lease expiry time and position it in the timer queue correctly.
|
|
*/
|
|
static void
|
|
nqsrv_instimeq(lp, duration)
|
|
register struct nqlease *lp;
|
|
u_int32_t duration;
|
|
{
|
|
register struct nqlease *tlp;
|
|
time_t newexpiry;
|
|
|
|
newexpiry = time_second + duration + nqsrv_clockskew;
|
|
if (lp->lc_expiry == newexpiry)
|
|
return;
|
|
if (TAILQ_NEXT(lp, lc_timer) != 0) {
|
|
TAILQ_REMOVE(&nqtimerhead, lp, lc_timer);
|
|
}
|
|
lp->lc_expiry = newexpiry;
|
|
|
|
/*
|
|
* Find where in the queue it should be.
|
|
*/
|
|
TAILQ_FOREACH_REVERSE(tlp, &nqtimerhead, nqtimerhead, lc_timer)
|
|
if (tlp->lc_expiry <= newexpiry)
|
|
break;
|
|
#ifdef HASNVRAM
|
|
if (tlp == TAILQ_LAST(&nqtimerhead))
|
|
NQSTORENOVRAM(newexpiry);
|
|
#endif /* HASNVRAM */
|
|
if (tlp == NULL) {
|
|
TAILQ_INSERT_HEAD(&nqtimerhead, lp, lc_timer);
|
|
} else {
|
|
TAILQ_INSERT_AFTER(&nqtimerhead, tlp, lp, lc_timer);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compare the requesting host address with the lph entry in the lease.
|
|
* Return true iff it is the same.
|
|
* This is somewhat messy due to the union in the nqhost structure.
|
|
* The local host is indicated by the special value of NQLOCALSLP for slp.
|
|
*/
|
|
static int
|
|
nqsrv_cmpnam(slp, nam, lph)
|
|
register struct nfssvc_sock *slp;
|
|
struct sockaddr *nam;
|
|
register struct nqhost *lph;
|
|
{
|
|
register struct sockaddr_in *saddr;
|
|
struct sockaddr *addr;
|
|
union nethostaddr lhaddr;
|
|
struct socket *nsso;
|
|
int ret;
|
|
|
|
if (slp == NQLOCALSLP) {
|
|
if (lph->lph_flag & LC_LOCAL)
|
|
return (1);
|
|
else
|
|
return (0);
|
|
}
|
|
nsso = slp->ns_so;
|
|
if (nsso && nsso->so_proto->pr_protocol == IPPROTO_UDP) {
|
|
addr = nam;
|
|
} else {
|
|
addr = slp->ns_nam;
|
|
}
|
|
if (lph->lph_flag & LC_UDP) {
|
|
ret = netaddr_match(AF_INET, &lph->lph_haddr, addr);
|
|
} else {
|
|
if ((lph->lph_slp->ns_flag & SLP_VALID) == 0)
|
|
return (0);
|
|
saddr = (struct sockaddr_in *)lph->lph_slp->ns_nam;
|
|
if (saddr->sin_family == AF_INET)
|
|
lhaddr.had_inetaddr = saddr->sin_addr.s_addr;
|
|
else
|
|
lhaddr.had_nam = lph->lph_slp->ns_nam;
|
|
ret = netaddr_match(saddr->sin_family, &lhaddr, addr);
|
|
}
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Send out eviction notice messages to all other hosts for the lease.
|
|
*/
|
|
static void
|
|
nqsrv_send_eviction(vp, lp, slp, nam, cred)
|
|
struct vnode *vp;
|
|
register struct nqlease *lp;
|
|
struct nfssvc_sock *slp;
|
|
struct sockaddr *nam;
|
|
struct ucred *cred;
|
|
{
|
|
register struct nqhost *lph = &lp->lc_host;
|
|
register int siz;
|
|
struct nqm *lphnext = lp->lc_morehosts;
|
|
struct mbuf *m, *mreq, *mb, *mb2, *mheadend;
|
|
struct sockaddr *nam2;
|
|
struct sockaddr_in *saddr;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
caddr_t bpos, cp;
|
|
u_int32_t xid, *tl;
|
|
int len = 1, ok = 1, i = 0;
|
|
|
|
while (ok && (lph->lph_flag & LC_VALID)) {
|
|
if (nqsrv_cmpnam(slp, nam, lph)) {
|
|
lph->lph_flag |= LC_VACATED;
|
|
} else if ((lph->lph_flag & (LC_LOCAL | LC_VACATED)) == 0) {
|
|
struct socket *so;
|
|
int sotype;
|
|
int *solockp = NULL;
|
|
|
|
so = lph->lph_slp->ns_so;
|
|
if (lph->lph_flag & LC_UDP) {
|
|
MALLOC(nam2, struct sockaddr *,
|
|
sizeof *nam2, M_SONAME, M_WAITOK);
|
|
saddr = (struct sockaddr_in *)nam2;
|
|
saddr->sin_len = sizeof *saddr;
|
|
saddr->sin_family = AF_INET;
|
|
saddr->sin_addr.s_addr = lph->lph_inetaddr;
|
|
saddr->sin_port = lph->lph_port;
|
|
} else if (lph->lph_slp->ns_flag & SLP_VALID) {
|
|
nam2 = (struct sockaddr *)0;
|
|
} else {
|
|
goto nextone;
|
|
}
|
|
sotype = so->so_type;
|
|
if (so->so_proto->pr_flags & PR_CONNREQUIRED)
|
|
solockp = &lph->lph_slp->ns_solock;
|
|
nfsm_reqhead((struct vnode *)0, NQNFSPROC_EVICTED,
|
|
NFSX_V3FH + NFSX_UNSIGNED);
|
|
fhp = &nfh.fh_generic;
|
|
bzero((caddr_t)fhp, sizeof(nfh));
|
|
fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid;
|
|
VFS_VPTOFH(vp, &fhp->fh_fid);
|
|
nfsm_srvfhtom(fhp, 1);
|
|
m = mreq;
|
|
siz = 0;
|
|
while (m) {
|
|
siz += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
if (siz <= 0 || siz > NFS_MAXPACKET) {
|
|
printf("mbuf siz=%d\n",siz);
|
|
panic("Bad nfs svc reply");
|
|
}
|
|
m = nfsm_rpchead(cred, (NFSMNT_NFSV3 | NFSMNT_NQNFS),
|
|
NQNFSPROC_EVICTED,
|
|
RPCAUTH_UNIX, 5 * NFSX_UNSIGNED, (char *)0,
|
|
0, (char *)NULL, mreq, siz, &mheadend, &xid);
|
|
/*
|
|
* For stream protocols, prepend a Sun RPC
|
|
* Record Mark.
|
|
*/
|
|
if (sotype == SOCK_STREAM) {
|
|
M_PREPEND(m, NFSX_UNSIGNED, M_TRYWAIT);
|
|
*mtod(m, u_int32_t *) = htonl(0x80000000 |
|
|
(m->m_pkthdr.len - NFSX_UNSIGNED));
|
|
}
|
|
/*
|
|
* nfs_sndlock if PR_CONNREQUIRED XXX
|
|
*/
|
|
|
|
if ((lph->lph_flag & LC_UDP) == 0 &&
|
|
((lph->lph_slp->ns_flag & SLP_VALID) == 0 ||
|
|
nfs_slplock(lph->lph_slp, 0) == 0)) {
|
|
m_freem(m);
|
|
} else {
|
|
(void) nfs_send(so, nam2, m,
|
|
(struct nfsreq *)0);
|
|
if (solockp)
|
|
nfs_slpunlock(lph->lph_slp);
|
|
}
|
|
if (lph->lph_flag & LC_UDP)
|
|
FREE(nam2, M_SONAME);
|
|
}
|
|
nextone:
|
|
if (++i == len) {
|
|
if (lphnext) {
|
|
i = 0;
|
|
len = LC_MOREHOSTSIZ;
|
|
lph = lphnext->lpm_hosts;
|
|
lphnext = lphnext->lpm_next;
|
|
} else
|
|
ok = 0;
|
|
} else
|
|
lph++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Wait for the lease to expire.
|
|
* This will occur when all clients have sent "vacated" messages to
|
|
* this server OR when it expires do to timeout.
|
|
*/
|
|
static void
|
|
nqsrv_waitfor_expiry(lp)
|
|
register struct nqlease *lp;
|
|
{
|
|
register struct nqhost *lph;
|
|
register int i;
|
|
struct nqm *lphnext;
|
|
int len, ok;
|
|
|
|
tryagain:
|
|
if (time_second > lp->lc_expiry)
|
|
return;
|
|
lph = &lp->lc_host;
|
|
lphnext = lp->lc_morehosts;
|
|
len = 1;
|
|
i = 0;
|
|
ok = 1;
|
|
while (ok && (lph->lph_flag & LC_VALID)) {
|
|
if ((lph->lph_flag & (LC_LOCAL | LC_VACATED)) == 0) {
|
|
lp->lc_flag |= LC_EXPIREDWANTED;
|
|
(void) tsleep((caddr_t)&lp->lc_flag, PSOCK,
|
|
"nqexp", 0);
|
|
goto tryagain;
|
|
}
|
|
if (++i == len) {
|
|
if (lphnext) {
|
|
i = 0;
|
|
len = LC_MOREHOSTSIZ;
|
|
lph = lphnext->lpm_hosts;
|
|
lphnext = lphnext->lpm_next;
|
|
} else
|
|
ok = 0;
|
|
} else
|
|
lph++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Nqnfs server timer that maintains the server lease queue.
|
|
* Scan the lease queue for expired entries:
|
|
* - when one is found, wakeup anyone waiting for it
|
|
* else dequeue and free
|
|
*/
|
|
void
|
|
nqnfs_serverd()
|
|
{
|
|
register struct nqlease *lp;
|
|
register struct nqhost *lph;
|
|
struct nqlease *nextlp;
|
|
struct nqm *lphnext, *olphnext;
|
|
int i, len, ok;
|
|
|
|
for (lp = TAILQ_FIRST(&nqtimerhead); lp; lp = nextlp) {
|
|
if (lp->lc_expiry >= time_second)
|
|
break;
|
|
nextlp = TAILQ_NEXT(lp, lc_timer);
|
|
if (lp->lc_flag & LC_EXPIREDWANTED) {
|
|
lp->lc_flag &= ~LC_EXPIREDWANTED;
|
|
wakeup((caddr_t)&lp->lc_flag);
|
|
} else if ((lp->lc_flag & (LC_LOCKED | LC_WANTED)) == 0) {
|
|
/*
|
|
* Make a best effort at keeping a write caching lease long
|
|
* enough by not deleting it until it has been explicitly
|
|
* vacated or there have been no writes in the previous
|
|
* write_slack seconds since expiry and the nfsds are not
|
|
* all busy. The assumption is that if the nfsds are not
|
|
* all busy now (no queue of nfs requests), then the client
|
|
* would have been able to do at least one write to the
|
|
* file during the last write_slack seconds if it was still
|
|
* trying to push writes to the server.
|
|
*/
|
|
if ((lp->lc_flag & (LC_WRITE | LC_VACATED)) == LC_WRITE &&
|
|
((lp->lc_flag & LC_WRITTEN) || nfsd_waiting == 0)) {
|
|
lp->lc_flag &= ~LC_WRITTEN;
|
|
nqsrv_instimeq(lp, nqsrv_writeslack);
|
|
} else {
|
|
TAILQ_REMOVE(&nqtimerhead, lp, lc_timer);
|
|
LIST_REMOVE(lp, lc_hash);
|
|
/*
|
|
* This soft reference may no longer be valid, but
|
|
* no harm done. The worst case is if the vnode was
|
|
* recycled and has another valid lease reference,
|
|
* which is dereferenced prematurely.
|
|
*/
|
|
lp->lc_vp->v_lease = (struct nqlease *)0;
|
|
lph = &lp->lc_host;
|
|
lphnext = lp->lc_morehosts;
|
|
olphnext = (struct nqm *)0;
|
|
len = 1;
|
|
i = 0;
|
|
ok = 1;
|
|
while (ok && (lph->lph_flag & LC_VALID)) {
|
|
if (lph->lph_flag & LC_SREF)
|
|
nfsrv_slpderef(lph->lph_slp);
|
|
if (++i == len) {
|
|
if (olphnext) {
|
|
free((caddr_t)olphnext, M_NQMHOST);
|
|
olphnext = (struct nqm *)0;
|
|
}
|
|
if (lphnext) {
|
|
olphnext = lphnext;
|
|
i = 0;
|
|
len = LC_MOREHOSTSIZ;
|
|
lph = lphnext->lpm_hosts;
|
|
lphnext = lphnext->lpm_next;
|
|
} else
|
|
ok = 0;
|
|
} else
|
|
lph++;
|
|
}
|
|
FREE((caddr_t)lp, M_NQLEASE);
|
|
if (olphnext)
|
|
free((caddr_t)olphnext, M_NQMHOST);
|
|
nfsstats.srvnqnfs_leases--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from nfssvc_nfsd() for a getlease rpc request.
|
|
* Do the from/to xdr translation and call nqsrv_getlease() to
|
|
* do the real work.
|
|
*/
|
|
int
|
|
nqnfsrv_getlease(nfsd, slp, procp, mrq)
|
|
struct nfsrv_descript *nfsd;
|
|
struct nfssvc_sock *slp;
|
|
struct proc *procp;
|
|
struct mbuf **mrq;
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
struct ucred *cred = &nfsd->nd_cr;
|
|
register struct nfs_fattr *fp;
|
|
struct vattr va;
|
|
register struct vattr *vap = &va;
|
|
struct vnode *vp;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
register u_int32_t *tl;
|
|
register int32_t t1;
|
|
u_quad_t frev;
|
|
caddr_t bpos;
|
|
int error = 0;
|
|
char *cp2;
|
|
struct mbuf *mb, *mb2, *mreq;
|
|
int flags, rdonly, cache;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
flags = fxdr_unsigned(int, *tl++);
|
|
nfsd->nd_duration = fxdr_unsigned(int, *tl);
|
|
error = nfsrv_fhtovp(fhp, 1, &vp, cred, slp, nam, &rdonly,
|
|
(nfsd->nd_flag & ND_KERBAUTH), TRUE);
|
|
if (error) {
|
|
nfsm_reply(0);
|
|
goto nfsmout;
|
|
}
|
|
if (rdonly && flags == ND_WRITE) {
|
|
error = EROFS;
|
|
vput(vp);
|
|
nfsm_reply(0);
|
|
}
|
|
(void) nqsrv_getlease(vp, &nfsd->nd_duration, flags, slp, procp,
|
|
nam, &cache, &frev, cred);
|
|
error = VOP_GETATTR(vp, vap, cred, procp);
|
|
vput(vp);
|
|
nfsm_reply(NFSX_V3FATTR + 4 * NFSX_UNSIGNED);
|
|
nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(cache);
|
|
*tl++ = txdr_unsigned(nfsd->nd_duration);
|
|
txdr_hyper(frev, tl);
|
|
nfsm_build(fp, struct nfs_fattr *, NFSX_V3FATTR);
|
|
nfsm_srvfillattr(vap, fp);
|
|
nfsm_srvdone;
|
|
}
|
|
|
|
/*
|
|
* Called from nfssvc_nfsd() when a "vacated" message is received from a
|
|
* client. Find the entry and expire it.
|
|
*/
|
|
int
|
|
nqnfsrv_vacated(nfsd, slp, procp, mrq)
|
|
struct nfsrv_descript *nfsd;
|
|
struct nfssvc_sock *slp;
|
|
struct proc *procp;
|
|
struct mbuf **mrq;
|
|
{
|
|
struct mbuf *mrep = nfsd->nd_mrep, *md = nfsd->nd_md;
|
|
struct sockaddr *nam = nfsd->nd_nam;
|
|
caddr_t dpos = nfsd->nd_dpos;
|
|
register struct nqlease *lp;
|
|
register struct nqhost *lph;
|
|
struct nqlease *tlp = (struct nqlease *)0;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
register u_int32_t *tl;
|
|
register int32_t t1;
|
|
struct nqm *lphnext;
|
|
struct mbuf *mreq, *mb;
|
|
int error = 0, i, len, ok, gotit = 0, cache = 0;
|
|
char *cp2, *bpos;
|
|
u_quad_t frev;
|
|
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
m_freem(mrep);
|
|
/*
|
|
* Find the lease by searching the hash list.
|
|
*/
|
|
for (lp = NQFHHASH(fhp->fh_fid.fid_data)->lh_first; lp != 0;
|
|
lp = lp->lc_hash.le_next)
|
|
if (fhp->fh_fsid.val[0] == lp->lc_fsid.val[0] &&
|
|
fhp->fh_fsid.val[1] == lp->lc_fsid.val[1] &&
|
|
!bcmp(fhp->fh_fid.fid_data, lp->lc_fiddata,
|
|
MAXFIDSZ)) {
|
|
/* Found it */
|
|
tlp = lp;
|
|
break;
|
|
}
|
|
if (tlp != 0) {
|
|
lp = tlp;
|
|
len = 1;
|
|
i = 0;
|
|
lph = &lp->lc_host;
|
|
lphnext = lp->lc_morehosts;
|
|
ok = 1;
|
|
while (ok && (lph->lph_flag & LC_VALID)) {
|
|
if (nqsrv_cmpnam(slp, nam, lph)) {
|
|
lph->lph_flag |= LC_VACATED;
|
|
gotit++;
|
|
break;
|
|
}
|
|
if (++i == len) {
|
|
if (lphnext) {
|
|
len = LC_MOREHOSTSIZ;
|
|
i = 0;
|
|
lph = lphnext->lpm_hosts;
|
|
lphnext = lphnext->lpm_next;
|
|
} else
|
|
ok = 0;
|
|
} else
|
|
lph++;
|
|
}
|
|
if ((lp->lc_flag & LC_EXPIREDWANTED) && gotit) {
|
|
lp->lc_flag &= ~LC_EXPIREDWANTED;
|
|
wakeup((caddr_t)&lp->lc_flag);
|
|
}
|
|
nfsmout:
|
|
return (EPERM);
|
|
}
|
|
return (EPERM);
|
|
}
|
|
|
|
#endif /* NFS_NOSERVER */
|
|
|
|
/*
|
|
* Client get lease rpc function.
|
|
*/
|
|
int
|
|
nqnfs_getlease(vp, rwflag, cred, p)
|
|
register struct vnode *vp;
|
|
int rwflag;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
register u_int32_t *tl;
|
|
register caddr_t cp;
|
|
register int32_t t1, t2;
|
|
register struct nfsnode *np;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
caddr_t bpos, dpos, cp2;
|
|
time_t reqtime;
|
|
int error = 0;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
int cachable;
|
|
u_quad_t frev;
|
|
|
|
nfsstats.rpccnt[NQNFSPROC_GETLEASE]++;
|
|
mb = mreq = nfsm_reqh(vp, NQNFSPROC_GETLEASE, NFSX_V3FH+2*NFSX_UNSIGNED,
|
|
&bpos);
|
|
nfsm_fhtom(vp, 1);
|
|
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(rwflag);
|
|
*tl = txdr_unsigned(nmp->nm_leaseterm);
|
|
reqtime = time_second;
|
|
nfsm_request(vp, NQNFSPROC_GETLEASE, p, cred);
|
|
np = VTONFS(vp);
|
|
nfsm_dissect(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
cachable = fxdr_unsigned(int, *tl++);
|
|
reqtime += fxdr_unsigned(int, *tl++);
|
|
if (reqtime > time_second) {
|
|
frev = fxdr_hyper(tl);
|
|
nqnfs_clientlease(nmp, np, rwflag, cachable, reqtime, frev);
|
|
nfsm_loadattr(vp, (struct vattr *)0);
|
|
} else
|
|
error = NQNFS_EXPIRED;
|
|
nfsm_reqdone;
|
|
return (error);
|
|
}
|
|
|
|
#ifndef NFS_NOSERVER
|
|
/*
|
|
* Client vacated message function.
|
|
*/
|
|
static int
|
|
nqnfs_vacated(vp, cred)
|
|
register struct vnode *vp;
|
|
struct ucred *cred;
|
|
{
|
|
register caddr_t cp;
|
|
register int i;
|
|
register u_int32_t *tl;
|
|
register int32_t t2;
|
|
caddr_t bpos;
|
|
u_int32_t xid;
|
|
int error = 0;
|
|
struct mbuf *m, *mreq, *mb, *mb2, *mheadend;
|
|
struct nfsmount *nmp;
|
|
struct nfsreq myrep;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
nfsstats.rpccnt[NQNFSPROC_VACATED]++;
|
|
nfsm_reqhead(vp, NQNFSPROC_VACATED, NFSX_FH(1));
|
|
nfsm_fhtom(vp, 1);
|
|
m = mreq;
|
|
i = 0;
|
|
while (m) {
|
|
i += m->m_len;
|
|
m = m->m_next;
|
|
}
|
|
m = nfsm_rpchead(cred, nmp->nm_flag, NQNFSPROC_VACATED,
|
|
RPCAUTH_UNIX, 5 * NFSX_UNSIGNED, (char *)0,
|
|
0, (char *)NULL, mreq, i, &mheadend, &xid);
|
|
if (nmp->nm_sotype == SOCK_STREAM) {
|
|
M_PREPEND(m, NFSX_UNSIGNED, M_TRYWAIT);
|
|
*mtod(m, u_int32_t *) = htonl(0x80000000 | (m->m_pkthdr.len -
|
|
NFSX_UNSIGNED));
|
|
}
|
|
myrep.r_flags = 0;
|
|
myrep.r_nmp = nmp;
|
|
if (nmp->nm_soflags & PR_CONNREQUIRED)
|
|
(void) nfs_sndlock(&myrep);
|
|
(void) nfs_send(nmp->nm_so, nmp->nm_nam, m, &myrep);
|
|
if (nmp->nm_soflags & PR_CONNREQUIRED)
|
|
nfs_sndunlock(&myrep);
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Called for client side callbacks
|
|
*/
|
|
int
|
|
nqnfs_callback(nmp, mrep, md, dpos)
|
|
struct nfsmount *nmp;
|
|
struct mbuf *mrep, *md;
|
|
caddr_t dpos;
|
|
{
|
|
register struct vnode *vp;
|
|
register u_int32_t *tl;
|
|
register int32_t t1;
|
|
nfsfh_t nfh;
|
|
fhandle_t *fhp;
|
|
struct nfsnode *np;
|
|
struct nfsd tnfsd;
|
|
struct nfssvc_sock *slp;
|
|
struct nfsrv_descript ndesc;
|
|
register struct nfsrv_descript *nfsd = &ndesc;
|
|
struct mbuf **mrq = (struct mbuf **)0, *mb, *mreq;
|
|
int error = 0, cache = 0;
|
|
char *cp2, *bpos;
|
|
u_quad_t frev;
|
|
|
|
#ifndef nolint
|
|
slp = NULL;
|
|
#endif
|
|
nfsd->nd_mrep = mrep;
|
|
nfsd->nd_md = md;
|
|
nfsd->nd_dpos = dpos;
|
|
error = nfs_getreq(nfsd, &tnfsd, FALSE);
|
|
if (error)
|
|
return (error);
|
|
md = nfsd->nd_md;
|
|
dpos = nfsd->nd_dpos;
|
|
if (nfsd->nd_procnum != NQNFSPROC_EVICTED) {
|
|
m_freem(mrep);
|
|
return (EPERM);
|
|
}
|
|
fhp = &nfh.fh_generic;
|
|
nfsm_srvmtofh(fhp);
|
|
m_freem(mrep);
|
|
error = nfs_nget(nmp->nm_mountp, (nfsfh_t *)fhp, NFSX_V3FH, &np);
|
|
if (error)
|
|
return (error);
|
|
vp = NFSTOV(np);
|
|
if (TAILQ_NEXT(np, n_timer) != 0) {
|
|
np->n_expiry = 0;
|
|
np->n_flag |= NQNFSEVICTED;
|
|
if (TAILQ_FIRST(&nmp->nm_timerhead) != np) {
|
|
TAILQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
|
|
TAILQ_INSERT_HEAD(&nmp->nm_timerhead, np, n_timer);
|
|
}
|
|
}
|
|
vput(vp);
|
|
nfsm_srvdone;
|
|
}
|
|
|
|
|
|
/*
|
|
* Nqnfs client helper daemon. Runs once a second to expire leases.
|
|
* It also get authorization strings for "kerb" mounts.
|
|
* It must start at the beginning of the list again after any potential
|
|
* "sleep" since nfs_reclaim() called from vclean() can pull a node off
|
|
* the list asynchronously.
|
|
*/
|
|
int
|
|
nqnfs_clientd(nmp, cred, ncd, flag, argp, p)
|
|
register struct nfsmount *nmp;
|
|
struct ucred *cred;
|
|
struct nfsd_cargs *ncd;
|
|
int flag;
|
|
caddr_t argp;
|
|
struct proc *p;
|
|
{
|
|
register struct nfsnode *np;
|
|
struct vnode *vp;
|
|
struct nfsreq myrep;
|
|
struct nfsuid *nuidp, *nnuidp;
|
|
int error = 0, vpid;
|
|
|
|
/*
|
|
* First initialize some variables
|
|
*/
|
|
|
|
/*
|
|
* If an authorization string is being passed in, get it.
|
|
*/
|
|
if ((flag & NFSSVC_GOTAUTH) &&
|
|
(nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT)) == 0) {
|
|
if (nmp->nm_state & NFSSTA_HASAUTH)
|
|
panic("cld kerb");
|
|
if ((flag & NFSSVC_AUTHINFAIL) == 0) {
|
|
if (ncd->ncd_authlen <= nmp->nm_authlen &&
|
|
ncd->ncd_verflen <= nmp->nm_verflen &&
|
|
!copyin(ncd->ncd_authstr,nmp->nm_authstr,ncd->ncd_authlen)&&
|
|
!copyin(ncd->ncd_verfstr,nmp->nm_verfstr,ncd->ncd_verflen)){
|
|
nmp->nm_authtype = ncd->ncd_authtype;
|
|
nmp->nm_authlen = ncd->ncd_authlen;
|
|
nmp->nm_verflen = ncd->ncd_verflen;
|
|
#ifdef NFSKERB
|
|
nmp->nm_key = ncd->ncd_key;
|
|
#endif
|
|
} else
|
|
nmp->nm_state |= NFSSTA_AUTHERR;
|
|
} else
|
|
nmp->nm_state |= NFSSTA_AUTHERR;
|
|
nmp->nm_state |= NFSSTA_HASAUTH;
|
|
wakeup((caddr_t)&nmp->nm_authlen);
|
|
} else
|
|
nmp->nm_state |= NFSSTA_WAITAUTH;
|
|
|
|
/*
|
|
* Loop every second updating queue until there is a termination sig.
|
|
*/
|
|
while ((nmp->nm_state & NFSSTA_DISMNT) == 0) {
|
|
if (nmp->nm_flag & NFSMNT_NQNFS) {
|
|
/*
|
|
* If there are no outstanding requests (and therefore no
|
|
* processes in nfs_reply) and there is data in the receive
|
|
* queue, poke for callbacks.
|
|
*/
|
|
if (nfs_reqq.tqh_first == 0 && nmp->nm_so &&
|
|
nmp->nm_so->so_rcv.sb_cc > 0) {
|
|
myrep.r_flags = R_GETONEREP;
|
|
myrep.r_nmp = nmp;
|
|
myrep.r_mrep = (struct mbuf *)0;
|
|
myrep.r_procp = (struct proc *)0;
|
|
(void) nfs_reply(&myrep);
|
|
}
|
|
|
|
/*
|
|
* Loop through the leases, updating as required.
|
|
*/
|
|
while ((np = TAILQ_FIRST(&nmp->nm_timerhead)) != NULL) {
|
|
if (nmp->nm_state & NFSSTA_DISMINPROG)
|
|
break;
|
|
vp = NFSTOV(np);
|
|
vpid = vp->v_id;
|
|
if (np->n_expiry < time_second) {
|
|
if (vget(vp, LK_EXCLUSIVE, p) == 0) {
|
|
nmp->nm_inprog = vp;
|
|
if (vpid == vp->v_id) {
|
|
TAILQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
|
|
TAILQ_NEXT(np, n_timer) = 0;
|
|
if (np->n_flag & (NMODIFIED | NQNFSEVICTED)) {
|
|
if (np->n_flag & NQNFSEVICTED) {
|
|
if (vp->v_type == VDIR)
|
|
nfs_invaldir(vp);
|
|
cache_purge(vp);
|
|
(void) nfs_vinvalbuf(vp,
|
|
V_SAVE, cred, p, 0);
|
|
np->n_flag &= ~NQNFSEVICTED;
|
|
(void) nqnfs_vacated(vp, cred);
|
|
} else if (vp->v_type == VREG) {
|
|
(void) VOP_FSYNC(vp, cred,
|
|
MNT_WAIT, p);
|
|
np->n_flag &= ~NMODIFIED;
|
|
}
|
|
}
|
|
}
|
|
vput(vp);
|
|
nmp->nm_inprog = NULLVP;
|
|
}
|
|
} else if ((np->n_expiry - NQ_RENEWAL) < time_second) {
|
|
if ((np->n_flag & (NQNFSWRITE | NQNFSNONCACHE))
|
|
== NQNFSWRITE &&
|
|
!TAILQ_EMPTY(&vp->v_dirtyblkhd) &&
|
|
vget(vp, LK_EXCLUSIVE, p) == 0) {
|
|
nmp->nm_inprog = vp;
|
|
if (vpid == vp->v_id &&
|
|
nqnfs_getlease(vp, ND_WRITE, cred, p)==0)
|
|
np->n_brev = np->n_lrev;
|
|
vput(vp);
|
|
nmp->nm_inprog = NULLVP;
|
|
}
|
|
} else
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get an authorization string, if required.
|
|
*/
|
|
if ((nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_DISMNT | NFSSTA_HASAUTH)) == 0) {
|
|
ncd->ncd_authuid = nmp->nm_authuid;
|
|
if (copyout((caddr_t)ncd, argp, sizeof (struct nfsd_cargs)))
|
|
nmp->nm_state |= NFSSTA_WAITAUTH;
|
|
else
|
|
return (ENEEDAUTH);
|
|
}
|
|
|
|
/*
|
|
* Wait a bit (no pun) and do it again.
|
|
*/
|
|
if ((nmp->nm_state & NFSSTA_DISMNT) == 0 &&
|
|
(nmp->nm_state & (NFSSTA_WAITAUTH | NFSSTA_HASAUTH))) {
|
|
error = tsleep((caddr_t)&nmp->nm_authstr, PSOCK | PCATCH,
|
|
"nqnfstimr", hz / 3);
|
|
if (error == EINTR || error == ERESTART)
|
|
(void) dounmount(nmp->nm_mountp, 0, p);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Finally, we can free up the mount structure.
|
|
*/
|
|
for (nuidp = nmp->nm_uidlruhead.tqh_first; nuidp != 0; nuidp = nnuidp) {
|
|
nnuidp = nuidp->nu_lru.tqe_next;
|
|
LIST_REMOVE(nuidp, nu_hash);
|
|
TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru);
|
|
free((caddr_t)nuidp, M_NFSUID);
|
|
}
|
|
zfree(nfsmount_zone, nmp);
|
|
if (error == EWOULDBLOCK)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
|
|
#endif /* NFS_NOSERVER */
|
|
|
|
/*
|
|
* Adjust all timer queue expiry times when the time of day clock is changed.
|
|
* Called from the settimeofday() syscall.
|
|
*/
|
|
void
|
|
nqnfs_lease_updatetime(deltat)
|
|
register int deltat;
|
|
{
|
|
struct proc *p = curproc; /* XXX */
|
|
struct nqlease *lp;
|
|
struct nfsnode *np;
|
|
struct mount *mp, *nxtmp;
|
|
struct nfsmount *nmp;
|
|
int s;
|
|
|
|
if (nqnfsstarttime != 0)
|
|
nqnfsstarttime += deltat;
|
|
s = splsoftclock();
|
|
TAILQ_FOREACH(lp, &nqtimerhead, lc_timer)
|
|
lp->lc_expiry += deltat;
|
|
splx(s);
|
|
|
|
/*
|
|
* Search the mount list for all nqnfs mounts and do their timer
|
|
* queues.
|
|
*/
|
|
mtx_lock(&mountlist_mtx);
|
|
for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nxtmp) {
|
|
if (vfs_busy(mp, LK_NOWAIT, &mountlist_mtx, p)) {
|
|
nxtmp = TAILQ_NEXT(mp, mnt_list);
|
|
continue;
|
|
}
|
|
if (mp->mnt_stat.f_type == nfs_mount_type) {
|
|
nmp = VFSTONFS(mp);
|
|
if (nmp->nm_flag & NFSMNT_NQNFS) {
|
|
TAILQ_FOREACH(np, &nmp->nm_timerhead, n_timer) {
|
|
np->n_expiry += deltat;
|
|
}
|
|
}
|
|
}
|
|
mtx_lock(&mountlist_mtx);
|
|
nxtmp = TAILQ_NEXT(mp, mnt_list);
|
|
vfs_unbusy(mp, p);
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
}
|
|
|
|
#ifndef NFS_NOSERVER
|
|
/*
|
|
* Lock a server lease.
|
|
*/
|
|
static void
|
|
nqsrv_locklease(lp)
|
|
struct nqlease *lp;
|
|
{
|
|
|
|
while (lp->lc_flag & LC_LOCKED) {
|
|
lp->lc_flag |= LC_WANTED;
|
|
(void) tsleep((caddr_t)lp, PSOCK, "nqlc", 0);
|
|
}
|
|
lp->lc_flag |= LC_LOCKED;
|
|
lp->lc_flag &= ~LC_WANTED;
|
|
}
|
|
|
|
/*
|
|
* Unlock a server lease.
|
|
*/
|
|
static void
|
|
nqsrv_unlocklease(lp)
|
|
struct nqlease *lp;
|
|
{
|
|
|
|
lp->lc_flag &= ~LC_LOCKED;
|
|
if (lp->lc_flag & LC_WANTED)
|
|
wakeup((caddr_t)lp);
|
|
}
|
|
#endif /* NFS_NOSERVER */
|
|
|
|
/*
|
|
* Update a client lease.
|
|
*/
|
|
void
|
|
nqnfs_clientlease(nmp, np, rwflag, cachable, expiry, frev)
|
|
register struct nfsmount *nmp;
|
|
register struct nfsnode *np;
|
|
int rwflag, cachable;
|
|
time_t expiry;
|
|
u_quad_t frev;
|
|
{
|
|
register struct nfsnode *tp;
|
|
|
|
if (TAILQ_NEXT(np, n_timer) != 0) {
|
|
TAILQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
|
|
if (rwflag == ND_WRITE)
|
|
np->n_flag |= NQNFSWRITE;
|
|
} else if (rwflag == ND_READ)
|
|
np->n_flag &= ~NQNFSWRITE;
|
|
else
|
|
np->n_flag |= NQNFSWRITE;
|
|
if (cachable)
|
|
np->n_flag &= ~NQNFSNONCACHE;
|
|
else
|
|
np->n_flag |= NQNFSNONCACHE;
|
|
np->n_expiry = expiry;
|
|
np->n_lrev = frev;
|
|
TAILQ_FOREACH_REVERSE(tp, &nmp->nm_timerhead, timhd, n_timer)
|
|
if (tp->n_expiry <= np->n_expiry)
|
|
break;
|
|
if (tp == NULL) {
|
|
TAILQ_INSERT_HEAD(&nmp->nm_timerhead, np, n_timer);
|
|
} else {
|
|
TAILQ_INSERT_AFTER(&nmp->nm_timerhead, tp, np, n_timer);
|
|
}
|
|
}
|