1 /* $NetBSD: kern_select_50.c,v 1.3 2019/09/20 15:05:22 kamil Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 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 * 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 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: kern_select_50.c,v 1.3 2019/09/20 15:05:22 kamil Exp $"); 33 34 #if defined(_KERNEL_OPT) 35 #include "opt_compat_netbsd.h" 36 #endif 37 38 #include <sys/param.h> 39 #include <sys/event.h> 40 #include <sys/poll.h> 41 #include <sys/select.h> 42 #include <sys/time.h> 43 #include <sys/syscall.h> 44 #include <sys/syscallvar.h> 45 #include <sys/syscallargs.h> 46 47 #include <compat/sys/time.h> 48 #include <compat/common/compat_mod.h> 49 50 static const struct syscall_package kern_select_50_syscalls[] = { 51 { SYS_compat_50_kevent, 0, (sy_call_t *)compat_50_sys_kevent }, 52 { SYS_compat_50_select, 0, (sy_call_t *)compat_50_sys_select }, 53 { SYS_compat_50_pselect, 0, (sy_call_t *)compat_50_sys_pselect }, 54 { SYS_compat_50_pollts, 0, (sy_call_t *)compat_50_sys_pollts }, 55 { 0, 0, NULL } 56 }; 57 58 static int 59 compat_50_kevent_fetch_timeout(const void *src, void *dest, size_t length) 60 { 61 struct timespec50 ts50; 62 int error; 63 64 KASSERT(length == sizeof(struct timespec)); 65 66 error = copyin(src, &ts50, sizeof(ts50)); 67 if (error) 68 return error; 69 timespec50_to_timespec(&ts50, (struct timespec *)dest); 70 return 0; 71 } 72 73 int 74 compat_50_sys_kevent(struct lwp *l, const struct compat_50_sys_kevent_args *uap, 75 register_t *retval) 76 { 77 /* { 78 syscallarg(int) fd; 79 syscallarg(keventp_t) changelist; 80 syscallarg(size_t) nchanges; 81 syscallarg(keventp_t) eventlist; 82 syscallarg(size_t) nevents; 83 syscallarg(struct timespec50) timeout; 84 } */ 85 static const struct kevent_ops compat_50_kevent_ops = { 86 .keo_private = NULL, 87 .keo_fetch_timeout = compat_50_kevent_fetch_timeout, 88 .keo_fetch_changes = kevent_fetch_changes, 89 .keo_put_events = kevent_put_events, 90 }; 91 92 return kevent1(retval, SCARG(uap, fd), SCARG(uap, changelist), 93 SCARG(uap, nchanges), SCARG(uap, eventlist), SCARG(uap, nevents), 94 (const struct timespec *)(const void *)SCARG(uap, timeout), 95 &compat_50_kevent_ops); 96 } 97 98 int 99 compat_50_sys_select(struct lwp *l, 100 const struct compat_50_sys_select_args *uap, register_t *retval) 101 { 102 /* { 103 syscallarg(int) nd; 104 syscallarg(fd_set *) in; 105 syscallarg(fd_set *) ou; 106 syscallarg(fd_set *) ex; 107 syscallarg(struct timeval50 *) tv; 108 } */ 109 struct timespec ats, *ts = NULL; 110 struct timeval50 atv50; 111 int error; 112 113 if (SCARG(uap, tv)) { 114 error = copyin(SCARG(uap, tv), (void *)&atv50, sizeof(atv50)); 115 if (error) 116 return error; 117 118 if (atv50.tv_usec < 0 || atv50.tv_usec >= 1000000) 119 return EINVAL; 120 121 ats.tv_sec = atv50.tv_sec; 122 ats.tv_nsec = atv50.tv_usec * 1000; 123 ts = &ats; 124 } 125 126 return selcommon(retval, SCARG(uap, nd), SCARG(uap, in), 127 SCARG(uap, ou), SCARG(uap, ex), ts, NULL); 128 } 129 130 int 131 compat_50_sys_pselect(struct lwp *l, 132 const struct compat_50_sys_pselect_args *uap, register_t *retval) 133 { 134 /* { 135 syscallarg(int) nd; 136 syscallarg(fd_set *) in; 137 syscallarg(fd_set *) ou; 138 syscallarg(fd_set *) ex; 139 syscallarg(const struct timespec50 *) ts; 140 syscallarg(sigset_t *) mask; 141 } */ 142 struct timespec50 ats50; 143 struct timespec ats, *ts = NULL; 144 sigset_t amask, *mask = NULL; 145 int error; 146 147 if (SCARG(uap, ts)) { 148 error = copyin(SCARG(uap, ts), &ats50, sizeof(ats50)); 149 if (error) 150 return error; 151 timespec50_to_timespec(&ats50, &ats); 152 ts = &ats; 153 } 154 if (SCARG(uap, mask) != NULL) { 155 error = copyin(SCARG(uap, mask), &amask, sizeof(amask)); 156 if (error) 157 return error; 158 mask = &amask; 159 } 160 161 return selcommon(retval, SCARG(uap, nd), SCARG(uap, in), 162 SCARG(uap, ou), SCARG(uap, ex), ts, mask); 163 } 164 165 int 166 compat_50_sys_pollts(struct lwp *l, const struct compat_50_sys_pollts_args *uap, 167 register_t *retval) 168 { 169 /* { 170 syscallarg(struct pollfd *) fds; 171 syscallarg(u_int) nfds; 172 syscallarg(const struct timespec50 *) ts; 173 syscallarg(const sigset_t *) mask; 174 } */ 175 struct timespec ats, *ts = NULL; 176 struct timespec50 ats50; 177 sigset_t amask, *mask = NULL; 178 int error; 179 180 if (SCARG(uap, ts)) { 181 error = copyin(SCARG(uap, ts), &ats50, sizeof(ats50)); 182 if (error) 183 return error; 184 timespec50_to_timespec(&ats50, &ats); 185 ts = &ats; 186 } 187 if (SCARG(uap, mask)) { 188 error = copyin(SCARG(uap, mask), &amask, sizeof(amask)); 189 if (error) 190 return error; 191 mask = &amask; 192 } 193 194 return pollcommon(retval, SCARG(uap, fds), SCARG(uap, nfds), ts, mask); 195 } 196 197 int 198 kern_select_50_init(void) 199 { 200 201 return syscall_establish(NULL, kern_select_50_syscalls); 202 } 203 204 int 205 kern_select_50_fini(void) 206 { 207 208 return syscall_disestablish(NULL, kern_select_50_syscalls); 209 } 210