1 /* $NetBSD: netbsd32_event.c,v 1.3 2007/09/10 10:35:53 cube 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 1.3 2007/09/10 10:35:53 cube 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, void *v, register_t *retval) 99 { 100 struct netbsd32_kevent_args /* { 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 } */ *uap = v; 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