mirror of
https://git.FreeBSD.org/src.git
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c675522fc4
provides the correct semantics for flock(2) style locks which are used by the lockf(1) command line tool and the pidfile(3) library. It also implements recovery from server restarts and ensures that dirty cache blocks are written to the server before obtaining locks (allowing multiple clients to use file locking to safely share data). Sponsored by: Isilon Systems PR: 94256 MFC after: 2 weeks
717 lines
16 KiB
C
717 lines
16 KiB
C
/*-
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* Copyright (c) 2008 Isilon Inc http://www.isilon.com/
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* Authors: Doug Rabson <dfr@rabson.org>
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* Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/cdefs.h>
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#ifndef lint
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/*static char sccsid[] = "from: @(#)nlm_prot.x 1.8 87/09/21 Copyr 1987 Sun Micro";*/
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/*static char sccsid[] = "from: * @(#)nlm_prot.x 2.1 88/08/01 4.0 RPCSRC";*/
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__RCSID("$NetBSD: nlm_prot.x,v 1.6 2000/06/07 14:30:15 bouyer Exp $");
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#endif /* not lint */
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <nlm/nlm_prot.h>
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#include <nlm/nlm.h>
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/**********************************************************************/
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/*
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* Convert between various versions of the protocol structures.
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*/
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static void
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nlm_convert_to_nlm4_lock(struct nlm4_lock *dst, struct nlm_lock *src)
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{
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dst->caller_name = src->caller_name;
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dst->fh = src->fh;
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dst->oh = src->oh;
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dst->svid = src->svid;
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dst->l_offset = src->l_offset;
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dst->l_len = src->l_len;
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}
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static void
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nlm_convert_to_nlm4_share(struct nlm4_share *dst, struct nlm_share *src)
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{
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dst->caller_name = src->caller_name;
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dst->fh = src->fh;
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dst->oh = src->oh;
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dst->mode = src->mode;
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dst->access = src->access;
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}
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static void
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nlm_convert_to_nlm_holder(struct nlm_holder *dst, struct nlm4_holder *src)
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{
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dst->exclusive = src->exclusive;
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dst->svid = src->svid;
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dst->oh = src->oh;
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dst->l_offset = src->l_offset;
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dst->l_len = src->l_len;
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}
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static void
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nlm_convert_to_nlm4_holder(struct nlm4_holder *dst, struct nlm_holder *src)
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{
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dst->exclusive = src->exclusive;
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dst->svid = src->svid;
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dst->oh = src->oh;
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dst->l_offset = src->l_offset;
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dst->l_len = src->l_len;
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}
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static enum nlm_stats
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nlm_convert_to_nlm_stats(enum nlm4_stats src)
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{
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if (src > nlm4_deadlck)
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return nlm_denied;
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return (enum nlm_stats) src;
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}
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static void
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nlm_convert_to_nlm_res(struct nlm_res *dst, struct nlm4_res *src)
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{
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dst->cookie = src->cookie;
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dst->stat.stat = nlm_convert_to_nlm_stats(src->stat.stat);
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}
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static void
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nlm_convert_to_nlm4_res(struct nlm4_res *dst, struct nlm_res *src)
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{
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dst->cookie = src->cookie;
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dst->stat.stat = (enum nlm4_stats) src->stat.stat;
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}
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/**********************************************************************/
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/*
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* RPC server stubs.
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*/
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bool_t
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nlm_sm_notify_0_svc(struct nlm_sm_status *argp, void *result, struct svc_req *rqstp)
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{
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nlm_sm_notify(argp);
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return (TRUE);
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}
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bool_t
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nlm_test_1_svc(struct nlm_testargs *argp, nlm_testres *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_testargs args4;
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nlm4_testres res4;
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args4.cookie = argp->cookie;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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retval = nlm4_test_4_svc(&args4, &res4, rqstp);
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if (retval) {
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result->cookie = res4.cookie;
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result->stat.stat = nlm_convert_to_nlm_stats(res4.stat.stat);
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if (result->stat.stat == nlm_denied)
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nlm_convert_to_nlm_holder(
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&result->stat.nlm_testrply_u.holder,
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&res4.stat.nlm4_testrply_u.holder);
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}
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return (retval);
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}
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bool_t
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nlm_lock_1_svc(struct nlm_lockargs *argp, nlm_res *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_lockargs args4;
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nlm4_res res4;
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args4.cookie = argp->cookie;
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args4.block = argp->block;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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args4.reclaim = argp->reclaim;
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args4.state = argp->state;
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retval = nlm4_lock_4_svc(&args4, &res4, rqstp);
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if (retval)
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nlm_convert_to_nlm_res(result, &res4);
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return (retval);
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}
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bool_t
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nlm_cancel_1_svc(struct nlm_cancargs *argp, nlm_res *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_cancargs args4;
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nlm4_res res4;
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args4.cookie = argp->cookie;
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args4.block = argp->block;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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retval = nlm4_cancel_4_svc(&args4, &res4, rqstp);
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if (retval)
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nlm_convert_to_nlm_res(result, &res4);
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return (retval);
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}
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bool_t
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nlm_unlock_1_svc(struct nlm_unlockargs *argp, nlm_res *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_unlockargs args4;
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nlm4_res res4;
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args4.cookie = argp->cookie;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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retval = nlm4_unlock_4_svc(&args4, &res4, rqstp);
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if (retval)
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nlm_convert_to_nlm_res(result, &res4);
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return (retval);
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}
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bool_t
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nlm_granted_1_svc(struct nlm_testargs *argp, nlm_res *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_testargs args4;
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nlm4_res res4;
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args4.cookie = argp->cookie;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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retval = nlm4_granted_4_svc(&args4, &res4, rqstp);
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if (retval)
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nlm_convert_to_nlm_res(result, &res4);
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return (retval);
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}
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bool_t
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nlm_test_msg_1_svc(struct nlm_testargs *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_testargs args4;
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nlm4_testres res4;
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nlm_testres res;
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CLIENT *rpc;
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char dummy;
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args4.cookie = argp->cookie;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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if (nlm_do_test(&args4, &res4, rqstp, &rpc))
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return (FALSE);
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res.cookie = res4.cookie;
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res.stat.stat = nlm_convert_to_nlm_stats(res4.stat.stat);
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if (res.stat.stat == nlm_denied)
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nlm_convert_to_nlm_holder(
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&res.stat.nlm_testrply_u.holder,
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&res4.stat.nlm4_testrply_u.holder);
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if (rpc) {
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nlm_test_res_1(&res, &dummy, rpc, NULL, nlm_zero_tv);
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CLNT_RELEASE(rpc);
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}
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xdr_free((xdrproc_t) xdr_nlm_testres, &res);
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return (FALSE);
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}
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bool_t
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nlm_lock_msg_1_svc(struct nlm_lockargs *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_lockargs args4;
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nlm4_res res4;
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nlm_res res;
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CLIENT *rpc;
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char dummy;
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args4.cookie = argp->cookie;
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args4.block = argp->block;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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args4.reclaim = argp->reclaim;
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args4.state = argp->state;
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if (nlm_do_lock(&args4, &res4, rqstp, TRUE, &rpc))
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return (FALSE);
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nlm_convert_to_nlm_res(&res, &res4);
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if (rpc) {
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nlm_lock_res_1(&res, &dummy, rpc, NULL, nlm_zero_tv);
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CLNT_RELEASE(rpc);
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}
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xdr_free((xdrproc_t) xdr_nlm_res, &res);
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return (FALSE);
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}
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bool_t
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nlm_cancel_msg_1_svc(struct nlm_cancargs *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_cancargs args4;
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nlm4_res res4;
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nlm_res res;
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CLIENT *rpc;
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char dummy;
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args4.cookie = argp->cookie;
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args4.block = argp->block;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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if (nlm_do_cancel(&args4, &res4, rqstp, &rpc))
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return (FALSE);
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nlm_convert_to_nlm_res(&res, &res4);
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if (rpc) {
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nlm_cancel_res_1(&res, &dummy, rpc, NULL, nlm_zero_tv);
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CLNT_RELEASE(rpc);
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}
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xdr_free((xdrproc_t) xdr_nlm_res, &res);
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return (FALSE);
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}
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bool_t
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nlm_unlock_msg_1_svc(struct nlm_unlockargs *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_unlockargs args4;
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nlm4_res res4;
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nlm_res res;
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CLIENT *rpc;
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char dummy;
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args4.cookie = argp->cookie;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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if (nlm_do_unlock(&args4, &res4, rqstp, &rpc))
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return (FALSE);
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nlm_convert_to_nlm_res(&res, &res4);
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if (rpc) {
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nlm_unlock_res_1(&res, &dummy, rpc, NULL, nlm_zero_tv);
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CLNT_RELEASE(rpc);
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}
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xdr_free((xdrproc_t) xdr_nlm_res, &res);
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return (FALSE);
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}
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bool_t
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nlm_granted_msg_1_svc(struct nlm_testargs *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_testargs args4;
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nlm4_res res4;
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nlm_res res;
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CLIENT *rpc;
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char dummy;
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args4.cookie = argp->cookie;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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if (nlm_do_granted(&args4, &res4, rqstp, &rpc))
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return (FALSE);
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nlm_convert_to_nlm_res(&res, &res4);
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if (rpc) {
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nlm_granted_res_1(&res, &dummy, rpc, NULL, nlm_zero_tv);
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CLNT_RELEASE(rpc);
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}
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xdr_free((xdrproc_t) xdr_nlm_res, &res);
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return (FALSE);
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}
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bool_t
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nlm_test_res_1_svc(nlm_testres *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_testres args4;
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args4.cookie = argp->cookie;
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if (argp->stat.stat == nlm_denied)
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nlm_convert_to_nlm4_holder(
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&args4.stat.nlm4_testrply_u.holder,
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&argp->stat.nlm_testrply_u.holder);
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return (nlm4_test_res_4_svc(&args4, result, rqstp));
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}
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bool_t
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nlm_lock_res_1_svc(nlm_res *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_res arg4;
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nlm_convert_to_nlm4_res(&arg4, argp);
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return (nlm4_lock_res_4_svc(&arg4, result, rqstp));
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}
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bool_t
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nlm_cancel_res_1_svc(nlm_res *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_res arg4;
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nlm_convert_to_nlm4_res(&arg4, argp);
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return (nlm4_cancel_res_4_svc(&arg4, result, rqstp));
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}
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bool_t
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nlm_unlock_res_1_svc(nlm_res *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_res arg4;
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nlm_convert_to_nlm4_res(&arg4, argp);
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return (nlm4_unlock_res_4_svc(&arg4, result, rqstp));
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}
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bool_t
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nlm_granted_res_1_svc(nlm_res *argp, void *result, struct svc_req *rqstp)
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{
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nlm4_res arg4;
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nlm_convert_to_nlm4_res(&arg4, argp);
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return (nlm4_granted_res_4_svc(&arg4, result, rqstp));
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}
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int
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nlm_prog_1_freeresult(SVCXPRT *transp, xdrproc_t xdr_result, caddr_t result)
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{
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(void) xdr_free(xdr_result, result);
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return (TRUE);
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}
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bool_t
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nlm_share_3_svc(nlm_shareargs *argp, nlm_shareres *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_shareargs args4;
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nlm4_shareres res4;
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args4.cookie = argp->cookie;
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nlm_convert_to_nlm4_share(&args4.share, &argp->share);
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args4.reclaim = argp->reclaim;
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retval = nlm4_share_4_svc(&args4, &res4, rqstp);
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if (retval) {
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result->cookie = res4.cookie;
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result->stat = nlm_convert_to_nlm_stats(res4.stat);
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result->sequence = res4.sequence;
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}
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return (retval);
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}
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bool_t
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nlm_unshare_3_svc(nlm_shareargs *argp, nlm_shareres *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_shareargs args4;
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nlm4_shareres res4;
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args4.cookie = argp->cookie;
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nlm_convert_to_nlm4_share(&args4.share, &argp->share);
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args4.reclaim = argp->reclaim;
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retval = nlm4_unshare_4_svc(&args4, &res4, rqstp);
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if (retval) {
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result->cookie = res4.cookie;
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result->stat = nlm_convert_to_nlm_stats(res4.stat);
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result->sequence = res4.sequence;
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}
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return (retval);
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}
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bool_t
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nlm_nm_lock_3_svc(nlm_lockargs *argp, nlm_res *result, struct svc_req *rqstp)
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{
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bool_t retval;
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nlm4_lockargs args4;
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nlm4_res res4;
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args4.cookie = argp->cookie;
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args4.block = argp->block;
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args4.exclusive = argp->exclusive;
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nlm_convert_to_nlm4_lock(&args4.alock, &argp->alock);
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args4.reclaim = argp->reclaim;
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args4.state = argp->state;
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retval = nlm4_nm_lock_4_svc(&args4, &res4, rqstp);
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if (retval)
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nlm_convert_to_nlm_res(result, &res4);
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return (retval);
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}
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|
|
bool_t
|
|
nlm_free_all_3_svc(nlm_notify *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
struct nlm4_notify args4;
|
|
|
|
args4.name = argp->name;
|
|
args4.state = argp->state;
|
|
|
|
return (nlm4_free_all_4_svc(&args4, result, rqstp));
|
|
}
|
|
|
|
int
|
|
nlm_prog_3_freeresult(SVCXPRT *transp, xdrproc_t xdr_result, caddr_t result)
|
|
{
|
|
|
|
(void) xdr_free(xdr_result, result);
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_test_4_svc(nlm4_testargs *argp, nlm4_testres *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
nlm_do_test(argp, result, rqstp, NULL);
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_lock_4_svc(nlm4_lockargs *argp, nlm4_res *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
nlm_do_lock(argp, result, rqstp, TRUE, NULL);
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_cancel_4_svc(nlm4_cancargs *argp, nlm4_res *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
nlm_do_cancel(argp, result, rqstp, NULL);
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_unlock_4_svc(nlm4_unlockargs *argp, nlm4_res *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
nlm_do_unlock(argp, result, rqstp, NULL);
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_granted_4_svc(nlm4_testargs *argp, nlm4_res *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
nlm_do_granted(argp, result, rqstp, NULL);
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_test_msg_4_svc(nlm4_testargs *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
nlm4_testres res4;
|
|
CLIENT *rpc;
|
|
char dummy;
|
|
|
|
if (nlm_do_test(argp, &res4, rqstp, &rpc))
|
|
return (FALSE);
|
|
if (rpc) {
|
|
nlm4_test_res_4(&res4, &dummy, rpc, NULL, nlm_zero_tv);
|
|
CLNT_RELEASE(rpc);
|
|
}
|
|
xdr_free((xdrproc_t) xdr_nlm4_testres, &res4);
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_lock_msg_4_svc(nlm4_lockargs *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
nlm4_res res4;
|
|
CLIENT *rpc;
|
|
char dummy;
|
|
|
|
if (nlm_do_lock(argp, &res4, rqstp, TRUE, &rpc))
|
|
return (FALSE);
|
|
if (rpc) {
|
|
nlm4_lock_res_4(&res4, &dummy, rpc, NULL, nlm_zero_tv);
|
|
CLNT_RELEASE(rpc);
|
|
}
|
|
xdr_free((xdrproc_t) xdr_nlm4_res, &res4);
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_cancel_msg_4_svc(nlm4_cancargs *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
nlm4_res res4;
|
|
CLIENT *rpc;
|
|
char dummy;
|
|
|
|
if (nlm_do_cancel(argp, &res4, rqstp, &rpc))
|
|
return (FALSE);
|
|
if (rpc) {
|
|
nlm4_cancel_res_4(&res4, &dummy, rpc, NULL, nlm_zero_tv);
|
|
CLNT_RELEASE(rpc);
|
|
}
|
|
xdr_free((xdrproc_t) xdr_nlm4_res, &res4);
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_unlock_msg_4_svc(nlm4_unlockargs *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
nlm4_res res4;
|
|
CLIENT *rpc;
|
|
char dummy;
|
|
|
|
if (nlm_do_unlock(argp, &res4, rqstp, &rpc))
|
|
if (rpc) {
|
|
nlm4_unlock_res_4(&res4, &dummy, rpc, NULL, nlm_zero_tv);
|
|
CLNT_RELEASE(rpc);
|
|
}
|
|
xdr_free((xdrproc_t) xdr_nlm4_res, &res4);
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_granted_msg_4_svc(nlm4_testargs *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
nlm4_res res4;
|
|
CLIENT *rpc;
|
|
char dummy;
|
|
|
|
if (nlm_do_granted(argp, &res4, rqstp, &rpc))
|
|
return (FALSE);
|
|
if (rpc) {
|
|
nlm4_granted_res_4(&res4, &dummy, rpc, NULL, nlm_zero_tv);
|
|
CLNT_RELEASE(rpc);
|
|
}
|
|
xdr_free((xdrproc_t) xdr_nlm4_res, &res4);
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_test_res_4_svc(nlm4_testres *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_lock_res_4_svc(nlm4_res *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_cancel_res_4_svc(nlm4_res *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_unlock_res_4_svc(nlm4_res *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_granted_res_4_svc(nlm4_res *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_share_4_svc(nlm4_shareargs *argp, nlm4_shareres *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
memset(result, 0, sizeof(*result));
|
|
result->stat = nlm4_denied;
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_unshare_4_svc(nlm4_shareargs *argp, nlm4_shareres *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
memset(result, 0, sizeof(*result));
|
|
result->stat = nlm4_denied;
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_nm_lock_4_svc(nlm4_lockargs *argp, nlm4_res *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
nlm_do_lock(argp, result, rqstp, FALSE, NULL);
|
|
return (TRUE);
|
|
}
|
|
|
|
bool_t
|
|
nlm4_free_all_4_svc(nlm4_notify *argp, void *result, struct svc_req *rqstp)
|
|
{
|
|
|
|
nlm_do_free_all(argp);
|
|
return (TRUE);
|
|
}
|
|
|
|
int
|
|
nlm_prog_4_freeresult(SVCXPRT *transp, xdrproc_t xdr_result, caddr_t result)
|
|
{
|
|
|
|
(void) xdr_free(xdr_result, result);
|
|
return (TRUE);
|
|
}
|