Home | History | Annotate | Line # | Download | only in netbsd32
netbsd32_event.c revision 1.4 
      1 /*	$NetBSD: netbsd32_event.c,v 1.4 2007/12/20 23:03:01 dsl Exp $	*/
      2 
      3 /*
      4  *  Copyright (c) 2005 The NetBSD Foundation.
      5  *  All rights reserved.
      6  *
      7  *  Redistribution and use in source and binary forms, with or without
      8  *  modification, are permitted provided that the following conditions
      9  *  are met:
     10  *  1. Redistributions of source code must retain the above copyright
     11  *     notice, this list of conditions and the following disclaimer.
     12  *  2. Redistributions in binary form must reproduce the above copyright
     13  *     notice, this list of conditions and the following disclaimer in the
     14  *     documentation and/or other materials provided with the distribution.
     15  *  3. Neither the name of The NetBSD Foundation nor the names of its
     16  *     contributors may be used to endorse or promote products derived
     17  *     from this software without specific prior written permission.
     18  *
     19  *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  *  POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: netbsd32_event.c,v 1.4 2007/12/20 23:03:01 dsl Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/file.h>
     39 #include <sys/filedesc.h>
     40 #include <sys/select.h>
     41 #include <sys/event.h>
     42 #include <sys/eventvar.h>
     43 #include <sys/malloc.h>
     44 #include <sys/proc.h>
     45 #include <sys/dirent.h>
     46 
     47 #include <compat/netbsd32/netbsd32.h>
     48 #include <compat/netbsd32/netbsd32_syscall.h>
     49 #include <compat/netbsd32/netbsd32_syscallargs.h>
     50 #include <compat/netbsd32/netbsd32_conv.h>
     51 
     52 static int
     53 netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
     54 {
     55 	struct netbsd32_timespec ts32;
     56 	int error;
     57 
     58 	KASSERT(length == sizeof(struct timespec));
     59 
     60 	error = copyin(src, &ts32, sizeof(ts32));
     61 	if (error)
     62 		return error;
     63 	netbsd32_to_timespec(&ts32, (struct timespec *)dest);
     64 	return 0;
     65 }
     66 
     67 static int
     68 netbsd32_kevent_fetch_changes(void *private, const struct kevent *changelist,
     69     struct kevent *changes, size_t index, int n)
     70 {
     71 	const struct netbsd32_kevent *src =
     72 	    (const struct netbsd32_kevent *)changelist;
     73 	struct netbsd32_kevent *kev32, *changes32 = private;
     74 	int error, i;
     75 
     76 	error = copyin(src + index, changes32, n * sizeof(*changes32));
     77 	if (error)
     78 		return error;
     79 	for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
     80 		netbsd32_to_kevent(kev32, changes);
     81 	return 0;
     82 }
     83 
     84 static int
     85 netbsd32_kevent_put_events(void *private, struct kevent *events,
     86     struct kevent *eventlist, size_t index, int n)
     87 {
     88 	struct netbsd32_kevent *kev32, *events32 = private;
     89 	int i;
     90 
     91 	for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
     92 		netbsd32_from_kevent(events, kev32);
     93 	kev32 = (struct netbsd32_kevent *)eventlist;
     94 	return  copyout(events32, kev32, n * sizeof(*events32));
     95 }
     96 
     97 int
     98 netbsd32_kevent(struct lwp *l, const struct netbsd32_kevent_args *uap, register_t *retval)
     99 {
    100 	/* {
    101 		syscallarg(int) fd;
    102 		syscallarg(netbsd32_keventp_t) changelist;
    103 		syscallarg(netbsd32_size_t) nchanges;
    104 		syscallarg(netbsd32_keventp_t) eventlist;
    105 		syscallarg(netbsd32_size_t) nevents;
    106 		syscallarg(netbsd32_timespecp_t) timeout;
    107 	} */
    108 	int error;
    109 	size_t maxalloc, nchanges, nevents;
    110 	struct kevent_ops netbsd32_kevent_ops = {
    111 		keo_fetch_timeout: netbsd32_kevent_fetch_timeout,
    112 		keo_fetch_changes: netbsd32_kevent_fetch_changes,
    113 		keo_put_events: netbsd32_kevent_put_events,
    114 	};
    115 
    116 	nchanges = SCARG(uap, nchanges);
    117 	nevents = SCARG(uap, nevents);
    118 	maxalloc = MIN(KQ_NEVENTS, MAX(nchanges, nevents));
    119 	netbsd32_kevent_ops.keo_private =
    120 	    malloc(maxalloc * sizeof(struct netbsd32_kevent), M_TEMP,
    121 	    M_WAITOK);
    122 
    123 	error = kevent1(l, retval, SCARG(uap, fd),
    124 	    NETBSD32PTR64(SCARG(uap, changelist)), nchanges,
    125 	    NETBSD32PTR64(SCARG(uap, eventlist)), nevents,
    126 	    NETBSD32PTR64(SCARG(uap, timeout)), &netbsd32_kevent_ops);
    127 
    128 	free(netbsd32_kevent_ops.keo_private, M_TEMP);
    129 	return error;
    130 }
    131