1 /* $NetBSD: netbsd32_event.c,v 1.2 2005/12/11 12:20:22 christos 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 1.2 2005/12/11 12:20:22 christos 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