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netbsd32_event.c revision 1.9.24.1 
      1 /*	$NetBSD: netbsd32_event.c,v 1.9.24.1 2014/06/30 12:10:05 msaitoh 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  *
     16  *  THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  *  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  *  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  *  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  *  POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: netbsd32_event.c,v 1.9.24.1 2014/06/30 12:10:05 msaitoh Exp $");
     31 
     32 #include <sys/types.h>
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/file.h>
     36 #include <sys/filedesc.h>
     37 #include <sys/select.h>
     38 #include <sys/event.h>
     39 #include <sys/eventvar.h>
     40 #include <sys/proc.h>
     41 #include <sys/dirent.h>
     42 
     43 #include <compat/netbsd32/netbsd32.h>
     44 #include <compat/netbsd32/netbsd32_syscall.h>
     45 #include <compat/netbsd32/netbsd32_syscallargs.h>
     46 #include <compat/netbsd32/netbsd32_conv.h>
     47 
     48 static int
     49 netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
     50 {
     51 	struct netbsd32_timespec ts32;
     52 	int error;
     53 
     54 	KASSERT(length == sizeof(struct timespec));
     55 
     56 	error = copyin(src, &ts32, sizeof(ts32));
     57 	if (error)
     58 		return error;
     59 	netbsd32_to_timespec(&ts32, (struct timespec *)dest);
     60 	return 0;
     61 }
     62 
     63 static int
     64 netbsd32_kevent_fetch_changes(void *private, const struct kevent *changelist,
     65     struct kevent *changes, size_t index, int n)
     66 {
     67 	const struct netbsd32_kevent *src =
     68 	    (const struct netbsd32_kevent *)changelist;
     69 	struct netbsd32_kevent *kev32, *changes32 = private;
     70 	int error, i;
     71 
     72 	error = copyin(src + index, changes32, n * sizeof(*changes32));
     73 	if (error)
     74 		return error;
     75 	for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
     76 		netbsd32_to_kevent(kev32, changes);
     77 	return 0;
     78 }
     79 
     80 static int
     81 netbsd32_kevent_put_events(void *private, struct kevent *events,
     82     struct kevent *eventlist, size_t index, int n)
     83 {
     84 	struct netbsd32_kevent *kev32, *events32 = private;
     85 	int i;
     86 
     87 	for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
     88 		netbsd32_from_kevent(events, kev32);
     89 	kev32 = (struct netbsd32_kevent *)eventlist;
     90 	return  copyout(events32, kev32, n * sizeof(*events32));
     91 }
     92 
     93 int
     94 netbsd32___kevent50(struct lwp *l,
     95     const struct netbsd32___kevent50_args *uap, register_t *retval)
     96 {
     97 	/* {
     98 		syscallarg(int) fd;
     99 		syscallarg(netbsd32_keventp_t) changelist;
    100 		syscallarg(netbsd32_size_t) nchanges;
    101 		syscallarg(netbsd32_keventp_t) eventlist;
    102 		syscallarg(netbsd32_size_t) nevents;
    103 		syscallarg(netbsd32_timespecp_t) timeout;
    104 	} */
    105 	int error;
    106 	size_t maxalloc, nchanges, nevents;
    107 	struct kevent_ops netbsd32_kevent_ops = {
    108 		.keo_fetch_timeout = netbsd32_kevent_fetch_timeout,
    109 		.keo_fetch_changes = netbsd32_kevent_fetch_changes,
    110 		.keo_put_events = netbsd32_kevent_put_events,
    111 	};
    112 
    113 	nchanges = SCARG(uap, nchanges);
    114 	nevents = SCARG(uap, nevents);
    115 	maxalloc = KQ_NEVENTS;
    116 
    117 	netbsd32_kevent_ops.keo_private =
    118 	    kmem_alloc(maxalloc * sizeof(struct netbsd32_kevent), KM_SLEEP);
    119 
    120 	error = kevent1(retval, SCARG(uap, fd),
    121 	    NETBSD32PTR64(SCARG(uap, changelist)), nchanges,
    122 	    NETBSD32PTR64(SCARG(uap, eventlist)), nevents,
    123 	    NETBSD32PTR64(SCARG(uap, timeout)), &netbsd32_kevent_ops);
    124 
    125 	kmem_free(netbsd32_kevent_ops.keo_private,
    126 	    maxalloc * sizeof(struct netbsd32_kevent));
    127 	return error;
    128 }
    129