1 /* $NetBSD: linux_time.c,v 1.23 2008/04/17 17:47:23 njoly 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 1.23 2008/04/17 17:47:23 njoly 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 #include <compat/linux/common/linux_ipc.h> 60 #include <compat/linux/common/linux_sem.h> 61 62 #include <compat/linux/linux_syscallargs.h> 63 64 #include <compat/common/compat_util.h> 65 66 static void native_to_linux_timespec(struct linux_timespec *, 67 struct timespec *); 68 static void linux_to_native_timespec(struct timespec *, 69 struct linux_timespec *); 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(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval) 86 { 87 /* { 88 syscallarg(struct timeval *) tz; 89 syscallarg(struct timezone *) tzp; 90 } */ 91 int error = 0; 92 93 if (SCARG(uap, tp)) { 94 error = sys_gettimeofday(l, (const void *)uap, retval); 95 if (error) 96 return (error); 97 } 98 99 if (SCARG(uap, tzp)) { 100 error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); 101 if (error) 102 return (error); 103 } 104 105 return (0); 106 } 107 108 int 109 linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval) 110 { 111 /* { 112 syscallarg(struct timeval *) tp; 113 syscallarg(struct timezone *) tzp; 114 } */ 115 int error = 0; 116 117 if (SCARG(uap, tp)) { 118 error = sys_settimeofday(l, (const void *)uap, retval); 119 if (error) 120 return (error); 121 } 122 123 /* 124 * If user is not the superuser, we returned 125 * after the sys_settimeofday() call. 126 */ 127 if (SCARG(uap, tzp)) { 128 error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); 129 if (error) 130 return (error); 131 } 132 133 return (0); 134 } 135 136 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 137 138 static void 139 native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) 140 { 141 ltp->tv_sec = ntp->tv_sec; 142 ltp->tv_nsec = ntp->tv_nsec; 143 } 144 145 static void 146 linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) 147 { 148 ntp->tv_sec = ltp->tv_sec; 149 ntp->tv_nsec = ltp->tv_nsec; 150 } 151 152 int 153 linux_to_native_clockid(clockid_t *n, clockid_t l) 154 { 155 switch (l) { 156 case LINUX_CLOCK_REALTIME: 157 *n = CLOCK_REALTIME; 158 break; 159 case LINUX_CLOCK_MONOTONIC: 160 *n = CLOCK_MONOTONIC; 161 break; 162 case LINUX_CLOCK_PROCESS_CPUTIME_ID: 163 case LINUX_CLOCK_THREAD_CPUTIME_ID: 164 case LINUX_CLOCK_REALTIME_HR: 165 case LINUX_CLOCK_MONOTONIC_HR: 166 return EINVAL; 167 } 168 169 return 0; 170 } 171 172 int 173 linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval) 174 { 175 /* { 176 syscallarg(clockid_t) which; 177 syscallarg(struct linux_timespec *)tp; 178 } */ 179 struct timespec ts; 180 struct linux_timespec lts; 181 182 switch (SCARG(uap, which)) { 183 case LINUX_CLOCK_REALTIME: 184 nanotime(&ts); 185 break; 186 case LINUX_CLOCK_MONOTONIC: 187 nanouptime(&ts); 188 break; 189 default: 190 return EINVAL; 191 } 192 193 native_to_linux_timespec(<s, &ts); 194 return copyout(<s, SCARG(uap, tp), sizeof lts); 195 } 196 197 int 198 linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval) 199 { 200 /* { 201 syscallarg(clockid_t) which; 202 syscallarg(struct linux_timespec *)tp; 203 } */ 204 struct timespec ts; 205 struct linux_timespec lts; 206 int error; 207 208 switch (SCARG(uap, which)) { 209 case LINUX_CLOCK_REALTIME: 210 break; 211 default: 212 return EINVAL; 213 } 214 215 error = copyin(SCARG(uap, tp), <s, sizeof lts); 216 if (error != 0) 217 return error; 218 219 linux_to_native_timespec(&ts, <s); 220 221 return settime(l->l_proc, &ts); 222 } 223 224 int 225 linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval) 226 { 227 /* { 228 syscallarg(clockid_t) which; 229 syscallarg(struct linux_timespec *)tp; 230 } */ 231 struct timespec ts; 232 struct linux_timespec lts; 233 int error; 234 clockid_t nwhich = 0; /* XXX: GCC */ 235 236 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 237 if (error != 0 || SCARG(uap, tp) == NULL) 238 return error; 239 240 ts.tv_sec = 0; 241 ts.tv_nsec = 1000000000 / tc_getfrequency(); 242 native_to_linux_timespec(<s, &ts); 243 return copyout(<s, SCARG(uap, tp), sizeof lts); 244 } 245 246 int 247 linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval) 248 { 249 /* { 250 syscallarg(clockid_t) which; 251 syscallarg(int) flags; 252 syscallarg(struct linux_timespec) *rqtp; 253 syscallarg(struct linux_timespec) *rmtp; 254 } */ 255 struct linux_timespec lrqts, lrmts; 256 struct timespec rqts, rmts; 257 int error, error1; 258 259 if (SCARG(uap, flags) != 0) 260 return EINVAL; /* XXX deal with TIMER_ABSTIME */ 261 262 if (SCARG(uap, which) != LINUX_CLOCK_REALTIME) 263 return EINVAL; 264 265 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); 266 if (error != 0) 267 return error; 268 269 linux_to_native_timespec(&rqts, &lrqts); 270 271 error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : 0); 272 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 273 return error; 274 275 native_to_linux_timespec(&lrmts, &rmts); 276 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); 277 return error1 ? error1 : error; 278 } 279