1 /* $NetBSD: linux_time.c,v 1.18 2007/05/13 11:04:11 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Emmanuel Dreyfus. 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: linux_time.c,v 1.18 2007/05/13 11:04:11 dsl Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/ucred.h> 44 #include <sys/kauth.h> 45 #include <sys/mount.h> 46 #include <sys/signal.h> 47 #include <sys/stdint.h> 48 #include <sys/time.h> 49 #include <sys/timetc.h> 50 #include <sys/systm.h> 51 #include <sys/syscallargs.h> 52 #include <sys/lwp.h> 53 #include <sys/proc.h> 54 55 #include <compat/linux/common/linux_types.h> 56 #include <compat/linux/common/linux_signal.h> 57 #include <compat/linux/common/linux_machdep.h> 58 #include <compat/linux/common/linux_sched.h> 59 60 #include <compat/linux/linux_syscallargs.h> 61 62 #include <compat/common/compat_util.h> 63 64 static void native_to_linux_timespec(struct linux_timespec *, 65 struct timespec *); 66 static void linux_to_native_timespec(struct timespec *, 67 struct linux_timespec *); 68 static int linux_to_native_clockid(clockid_t *, clockid_t); 69 70 /* 71 * This is not implemented for alpha yet 72 */ 73 #if defined (__i386__) || defined (__m68k__) || \ 74 defined (__powerpc__) || defined (__mips__) || \ 75 defined(__arm__) || defined(__amd64__) 76 77 /* 78 * Linux keeps track of a system timezone in the kernel. It is readen 79 * by gettimeofday and set by settimeofday. This emulates this behavior 80 * See linux/kernel/time.c 81 */ 82 struct timezone linux_sys_tz; 83 84 int 85 linux_sys_gettimeofday(l, v, retval) 86 struct lwp *l; 87 void *v; 88 register_t *retval; 89 { 90 struct linux_sys_gettimeofday_args /* { 91 syscallarg(struct timeval *) tz; 92 syscallarg(struct timezone *) tzp; 93 } */ *uap = v; 94 int error = 0; 95 96 if (SCARG(uap, tp)) { 97 error = sys_gettimeofday (l, v, retval); 98 if (error) 99 return (error); 100 } 101 102 if (SCARG(uap, tzp)) { 103 error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); 104 if (error) 105 return (error); 106 } 107 108 return (0); 109 } 110 111 int 112 linux_sys_settimeofday(l, v, retval) 113 struct lwp *l; 114 void *v; 115 register_t *retval; 116 { 117 struct linux_sys_settimeofday_args /* { 118 syscallarg(struct timeval *) tp; 119 syscallarg(struct timezone *) tzp; 120 } */ *uap = v; 121 int error = 0; 122 123 if (SCARG(uap, tp)) { 124 error = sys_settimeofday(l, v, retval); 125 if (error) 126 return (error); 127 } 128 129 /* 130 * If user is not the superuser, we returned 131 * after the sys_settimeofday() call. 132 */ 133 if (SCARG(uap, tzp)) { 134 error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); 135 if (error) 136 return (error); 137 } 138 139 return (0); 140 } 141 142 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 143 144 static void 145 native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) 146 { 147 ltp->tv_sec = ntp->tv_sec; 148 ltp->tv_nsec = ntp->tv_nsec; 149 } 150 151 static void 152 linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) 153 { 154 ntp->tv_sec = ltp->tv_sec; 155 ntp->tv_nsec = ltp->tv_nsec; 156 } 157 158 static int 159 linux_to_native_clockid(clockid_t *n, clockid_t l) 160 { 161 switch (l) { 162 case LINUX_CLOCK_REALTIME: 163 *n = CLOCK_REALTIME; 164 break; 165 case LINUX_CLOCK_MONOTONIC: 166 *n = CLOCK_MONOTONIC; 167 break; 168 case LINUX_CLOCK_PROCESS_CPUTIME_ID: 169 case LINUX_CLOCK_THREAD_CPUTIME_ID: 170 case LINUX_CLOCK_REALTIME_HR: 171 case LINUX_CLOCK_MONOTONIC_HR: 172 return EINVAL; 173 } 174 175 return 0; 176 } 177 178 int 179 linux_sys_clock_gettime(l, v, retval) 180 struct lwp *l; 181 void *v; 182 register_t *retval; 183 { 184 struct linux_sys_clock_gettime_args /* { 185 syscallarg(clockid_t) which; 186 syscallarg(struct linux_timespec *)tp; 187 } */ *uap = v; 188 struct timespec ts; 189 struct linux_timespec lts; 190 191 switch (SCARG(uap, which)) { 192 case LINUX_CLOCK_REALTIME: 193 nanotime(&ts); 194 break; 195 case LINUX_CLOCK_MONOTONIC: 196 nanouptime(&ts); 197 break; 198 default: 199 return EINVAL; 200 } 201 202 native_to_linux_timespec(<s, &ts); 203 return copyout(<s, SCARG(uap, tp), sizeof lts); 204 } 205 206 int 207 linux_sys_clock_settime(l, v, retval) 208 struct lwp *l; 209 void *v; 210 register_t *retval; 211 { 212 struct linux_sys_clock_settime_args /* { 213 syscallarg(clockid_t) which; 214 syscallarg(struct linux_timespec *)tp; 215 } */ *uap = v; 216 struct timespec ts; 217 struct linux_timespec lts; 218 int error; 219 220 switch (SCARG(uap, which)) { 221 case LINUX_CLOCK_REALTIME: 222 break; 223 default: 224 return EINVAL; 225 } 226 227 error = copyin(SCARG(uap, tp), <s, sizeof lts); 228 if (error != 0) 229 return error; 230 231 linux_to_native_timespec(&ts, <s); 232 233 error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 234 KAUTH_REQ_SYSTEM_TIME_SYSTEM, NULL, NULL, NULL); 235 if (error != 0) 236 return (error); 237 238 return settime(l->l_proc, &ts); 239 } 240 241 int 242 linux_sys_clock_getres(l, v, retval) 243 struct lwp *l; 244 void *v; 245 register_t *retval; 246 { 247 struct linux_sys_clock_gettime_args /* { 248 syscallarg(clockid_t) which; 249 syscallarg(struct linux_timespec *)tp; 250 } */ *uap = v; 251 struct timespec ts; 252 struct linux_timespec lts; 253 int error; 254 clockid_t nwhich = 0; /* XXX: GCC */ 255 256 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 257 if (error != 0 || SCARG(uap, tp) == NULL) 258 return error; 259 260 ts.tv_sec = 0; 261 ts.tv_nsec = 1000000000 / tc_getfrequency(); 262 native_to_linux_timespec(<s, &ts); 263 return copyout(<s, SCARG(uap, tp), sizeof lts); 264 } 265 266 int 267 linux_sys_clock_nanosleep(l, v, retval) 268 struct lwp *l; 269 void *v; 270 register_t *retval; 271 { 272 struct linux_sys_clock_nanosleep_args /* { 273 syscallarg(clockid_t) which; 274 syscallarg(int) flags; 275 syscallarg(struct linux_timespec) *rqtp; 276 syscallarg(struct linux_timespec) *rmtp; 277 } */ *uap = v; 278 struct linux_timespec lrqts, lrmts; 279 struct timespec rqts, rmts; 280 int error, error1; 281 282 if (SCARG(uap, flags) != 0) 283 return EINVAL; /* XXX deal with TIMER_ABSTIME */ 284 285 if (SCARG(uap, which) != LINUX_CLOCK_REALTIME) 286 return EINVAL; 287 288 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); 289 if (error != 0) 290 return error; 291 292 linux_to_native_timespec(&rqts, &lrqts); 293 294 error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : 0); 295 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 296 return error; 297 298 native_to_linux_timespec(&lrmts, &rmts); 299 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); 300 return error1 ? error1 : error; 301 } 302