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      1 /*	$NetBSD: netbsd32_event.c,v 1.14 2023/07/29 12:48:15 rin 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 1.14 2023/07/29 12:48:15 rin 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 #include <compat/netbsd32/netbsd32_event.h>
     48 
     49 int
     50 netbsd32_kevent_fetch_timeout(const void *src, void *dest, size_t length)
     51 {
     52 	struct netbsd32_timespec ts32;
     53 	int error;
     54 
     55 	KASSERT(length == sizeof(struct timespec));
     56 
     57 	error = copyin(src, &ts32, sizeof(ts32));
     58 	if (error)
     59 		return error;
     60 	netbsd32_to_timespec(&ts32, (struct timespec *)dest);
     61 	return 0;
     62 }
     63 
     64 static int
     65 netbsd32_kevent_fetch_changes(void *ctx, const struct kevent *changelist,
     66     struct kevent *changes, size_t index, int n)
     67 {
     68 	const struct netbsd32_kevent *src =
     69 	    (const struct netbsd32_kevent *)changelist;
     70 	struct netbsd32_kevent *kev32, *changes32 = ctx;
     71 	int error, i;
     72 
     73 	error = copyin(src + index, changes32, n * sizeof(*changes32));
     74 	if (error)
     75 		return error;
     76 	for (i = 0, kev32 = changes32; i < n; i++, kev32++, changes++)
     77 		netbsd32_to_kevent(kev32, changes);
     78 	return 0;
     79 }
     80 
     81 static int
     82 netbsd32_kevent_put_events(void *ctx, struct kevent *events,
     83     struct kevent *eventlist, size_t index, int n)
     84 {
     85 	struct netbsd32_kevent *kev32, *events32 = ctx;
     86 	int i;
     87 
     88 	for (i = 0, kev32 = events32; i < n; i++, kev32++, events++)
     89 		netbsd32_from_kevent(events, kev32);
     90 	kev32 = ((struct netbsd32_kevent *)eventlist) + index;
     91 	return  copyout(events32, kev32, n * sizeof(*events32));
     92 }
     93 
     94 int
     95 netbsd32_kevent1(register_t *retval, int fd,
     96     const netbsd32_keventp_t changelist, netbsd32_size_t nchanges,
     97     netbsd32_keventp_t eventlist, netbsd32_size_t nevents,
     98     netbsd32_timespecp_t timeout, struct kevent_ops *kops)
     99 {
    100 	const size_t maxalloc = KQ_NEVENTS;
    101 	int error;
    102 
    103 	kops->keo_private =
    104 	    kmem_alloc(maxalloc * sizeof(struct netbsd32_kevent), KM_SLEEP);
    105 
    106 	error = kevent1(retval, fd, NETBSD32PTR64(changelist), nchanges,
    107 	    NETBSD32PTR64(eventlist), nevents, NETBSD32PTR64(timeout), kops);
    108 
    109 	kmem_free(kops->keo_private, maxalloc * sizeof(struct netbsd32_kevent));
    110 	return error;
    111 }
    112 
    113 int
    114 netbsd32___kevent100(struct lwp *l,
    115     const struct netbsd32___kevent100_args *uap, register_t *retval)
    116 {
    117 	/* {
    118 		syscallarg(int) fd;
    119 		syscallarg(const netbsd32_keventp_t) changelist;
    120 		syscallarg(netbsd32_size_t) nchanges;
    121 		syscallarg(netbsd32_keventp_t) eventlist;
    122 		syscallarg(netbsd32_size_t) nevents;
    123 		syscallarg(netbsd32_timespecp_t) timeout;
    124 	} */
    125 	struct kevent_ops kops = {
    126 		.keo_fetch_timeout = netbsd32_kevent_fetch_timeout,
    127 		.keo_fetch_changes = netbsd32_kevent_fetch_changes,
    128 		.keo_put_events = netbsd32_kevent_put_events,
    129 	};
    130 
    131 	return netbsd32_kevent1(retval, SCARG(uap, fd),
    132 	    SCARG(uap, changelist), SCARG(uap, nchanges),
    133 	    SCARG(uap, eventlist), SCARG(uap, nevents),
    134 	    SCARG(uap, timeout), &kops);
    135 }
    136