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netbsd32_event.c revision 1.1 
      1 /*	$NetBSD: netbsd32_event.c,v 1.1 2005/10/23 01:33:32 cube Exp $	*/
      2 
      3 /*
      4  *  Copyright (c) 2005 The NetBSD Foundation.
      5  *  All rights reserved.
      6  *
      7  *  This code is derived from software contributed to the NetBSD Foundation
      8  *   by Quentin Garnier.
      9  *
     10  *  Redistribution and use in source and binary forms, with or without
     11  *  modification, are permitted provided that the following conditions
     12  *  are met:
     13  *  1. Redistributions of source code must retain the above copyright
     14  *     notice, this list of conditions and the following disclaimer.
     15  *  2. Redistributions in binary form must reproduce the above copyright
     16  *     notice, this list of conditions and the following disclaimer in the
     17  *     documentation and/or other materials provided with the distribution.
     18  *  3. All advertising materials mentioning features or use of this software
     19  *     must display the following acknowledgement:
     20  *         This product includes software developed by the NetBSD
     21  *         Foundation, Inc. and its contributors.
     22  *  4. Neither the name of The NetBSD Foundation nor the names of its
     23  *     contributors may be used to endorse or promote products derived
     24  *     from this software without specific prior written permission.
     25  *
     26  *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  *  POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: netbsd32_event.c,v 1.1 2005/10/23 01:33:32 cube Exp $");
     41 
     42 #include <sys/types.h>
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/file.h>
     46 #include <sys/filedesc.h>
     47 #include <sys/select.h>
     48 #include <sys/event.h>
     49 #include <sys/eventvar.h>
     50 #include <sys/malloc.h>
     51 #include <sys/proc.h>
     52 #include <sys/dirent.h>
     53 
     54 #include <compat/netbsd32/netbsd32.h>
     55 #include <compat/netbsd32/netbsd32_syscall.h>
     56 #include <compat/netbsd32/netbsd32_syscallargs.h>
     57 #include <compat/netbsd32/netbsd32_conv.h>
     58 
     59 static int
     60 netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
     61 {
     62 	struct netbsd32_timespec ts32;
     63 	int error;
     64 
     65 	KASSERT(length == sizeof(struct timespec));
     66 
     67 	error = copyin(src, &ts32, sizeof(ts32));
     68 	if (error)
     69 		return error;
     70 	netbsd32_to_timespec(&ts32, (struct timespec *)dest);
     71 	return 0;
     72 }
     73 
     74 static int
     75 netbsd32_kevent_fetch_changes(void *private, const struct kevent *changelist,
     76     struct kevent *changes, size_t index, int n)
     77 {
     78 	const struct netbsd32_kevent *src =
     79 	    (const struct netbsd32_kevent *)changelist;
     80 	struct netbsd32_kevent *kev32, *changes32 = private;
     81 	int error, i;
     82 
     83 	error = copyin(src + index, changes32, n * sizeof(*changes32));
     84 	if (error)
     85 		return error;
     86 	for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
     87 		netbsd32_to_kevent(kev32, changes);
     88 	return 0;
     89 }
     90 
     91 static int
     92 netbsd32_kevent_put_events(void *private, struct kevent *events,
     93     struct kevent *eventlist, size_t index, int n)
     94 {
     95 	struct netbsd32_kevent *kev32, *events32 = private;
     96 	int i;
     97 
     98 	for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
     99 		netbsd32_from_kevent(events, kev32);
    100 	kev32 = (struct netbsd32_kevent *)eventlist;
    101 	return  copyout(events32, kev32, n * sizeof(*events32));
    102 }
    103 
    104 int
    105 netbsd32_kevent(struct lwp *l, void *v, register_t *retval)
    106 {
    107 	struct netbsd32_kevent_args /* {
    108 		syscallarg(int) fd;
    109 		syscallarg(netbsd32_keventp_t) changelist;
    110 		syscallarg(netbsd32_size_t) nchanges;
    111 		syscallarg(netbsd32_keventp_t) eventlist;
    112 		syscallarg(netbsd32_size_t) nevents;
    113 		syscallarg(netbsd32_timespecp_t) timeout;
    114 	} */ *uap = v;
    115 	int error;
    116 	size_t maxalloc, nchanges, nevents;
    117 	struct kevent_ops netbsd32_kevent_ops = {
    118 		keo_fetch_timeout: netbsd32_kevent_fetch_timeout,
    119 		keo_fetch_changes: netbsd32_kevent_fetch_changes,
    120 		keo_put_events: netbsd32_kevent_put_events,
    121 	};
    122 
    123 	nchanges = SCARG(uap, nchanges);
    124 	nevents = SCARG(uap, nevents);
    125 	maxalloc = MIN(KQ_NEVENTS, MAX(nchanges, nevents));
    126 	netbsd32_kevent_ops.keo_private =
    127 	    malloc(maxalloc * sizeof(struct netbsd32_kevent), M_TEMP,
    128 	    M_WAITOK);
    129 
    130 	error = kevent1(l, retval, SCARG(uap, fd),
    131 	    NETBSD32PTR64(SCARG(uap, changelist)), nchanges,
    132 	    NETBSD32PTR64(SCARG(uap, eventlist)), nevents,
    133 	    NETBSD32PTR64(SCARG(uap, timeout)), &netbsd32_kevent_ops);
    134 
    135 	free(netbsd32_kevent_ops.keo_private, M_TEMP);
    136 	return error;
    137 }
    138