1 /* $NetBSD: linux_time.c,v 1.25 2008/06/18 12:24:18 tsutsui 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 * 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: linux_time.c,v 1.25 2008/06/18 12:24:18 tsutsui Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/ucred.h> 37 #include <sys/kauth.h> 38 #include <sys/mount.h> 39 #include <sys/signal.h> 40 #include <sys/stdint.h> 41 #include <sys/time.h> 42 #include <sys/timetc.h> 43 #include <sys/systm.h> 44 #include <sys/sched.h> 45 #include <sys/syscallargs.h> 46 #include <sys/lwp.h> 47 #include <sys/proc.h> 48 49 #include <compat/linux/common/linux_types.h> 50 #include <compat/linux/common/linux_signal.h> 51 #include <compat/linux/common/linux_machdep.h> 52 #include <compat/linux/common/linux_sched.h> 53 #include <compat/linux/common/linux_ipc.h> 54 #include <compat/linux/common/linux_sem.h> 55 56 #include <compat/linux/linux_syscallargs.h> 57 58 #include <compat/common/compat_util.h> 59 60 static void native_to_linux_timespec(struct linux_timespec *, 61 struct timespec *); 62 static void linux_to_native_timespec(struct timespec *, 63 struct linux_timespec *); 64 /* 65 * This is not implemented for alpha yet 66 */ 67 #if defined (__i386__) || defined (__m68k__) || \ 68 defined (__powerpc__) || defined (__mips__) || \ 69 defined(__arm__) || defined(__amd64__) 70 71 /* 72 * Linux keeps track of a system timezone in the kernel. It is readen 73 * by gettimeofday and set by settimeofday. This emulates this behavior 74 * See linux/kernel/time.c 75 */ 76 struct timezone linux_sys_tz; 77 78 int 79 linux_sys_gettimeofday(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval) 80 { 81 /* { 82 syscallarg(struct timeval *) tz; 83 syscallarg(struct timezone *) tzp; 84 } */ 85 int error = 0; 86 87 if (SCARG(uap, tp)) { 88 error = sys_gettimeofday(l, (const void *)uap, retval); 89 if (error) 90 return (error); 91 } 92 93 if (SCARG(uap, tzp)) { 94 error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); 95 if (error) 96 return (error); 97 } 98 99 return (0); 100 } 101 102 int 103 linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval) 104 { 105 /* { 106 syscallarg(struct timeval *) tp; 107 syscallarg(struct timezone *) tzp; 108 } */ 109 int error = 0; 110 111 if (SCARG(uap, tp)) { 112 error = sys_settimeofday(l, (const void *)uap, retval); 113 if (error) 114 return (error); 115 } 116 117 /* 118 * If user is not the superuser, we returned 119 * after the sys_settimeofday() call. 120 */ 121 if (SCARG(uap, tzp)) { 122 error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); 123 if (error) 124 return (error); 125 } 126 127 return (0); 128 } 129 130 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 131 132 static void 133 native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) 134 { 135 ltp->tv_sec = ntp->tv_sec; 136 ltp->tv_nsec = ntp->tv_nsec; 137 } 138 139 static void 140 linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) 141 { 142 ntp->tv_sec = ltp->tv_sec; 143 ntp->tv_nsec = ltp->tv_nsec; 144 } 145 146 int 147 linux_to_native_clockid(clockid_t *n, clockid_t l) 148 { 149 switch (l) { 150 case LINUX_CLOCK_REALTIME: 151 *n = CLOCK_REALTIME; 152 break; 153 case LINUX_CLOCK_MONOTONIC: 154 *n = CLOCK_MONOTONIC; 155 break; 156 case LINUX_CLOCK_PROCESS_CPUTIME_ID: 157 case LINUX_CLOCK_THREAD_CPUTIME_ID: 158 case LINUX_CLOCK_REALTIME_HR: 159 case LINUX_CLOCK_MONOTONIC_HR: 160 return EINVAL; 161 } 162 163 return 0; 164 } 165 166 int 167 linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval) 168 { 169 /* { 170 syscallarg(clockid_t) which; 171 syscallarg(struct linux_timespec *)tp; 172 } */ 173 struct timespec ts; 174 struct linux_timespec lts; 175 176 switch (SCARG(uap, which)) { 177 case LINUX_CLOCK_REALTIME: 178 nanotime(&ts); 179 break; 180 case LINUX_CLOCK_MONOTONIC: 181 nanouptime(&ts); 182 break; 183 default: 184 return EINVAL; 185 } 186 187 native_to_linux_timespec(<s, &ts); 188 return copyout(<s, SCARG(uap, tp), sizeof lts); 189 } 190 191 int 192 linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval) 193 { 194 /* { 195 syscallarg(clockid_t) which; 196 syscallarg(struct linux_timespec *)tp; 197 } */ 198 struct timespec ts; 199 struct linux_timespec lts; 200 int error; 201 202 switch (SCARG(uap, which)) { 203 case LINUX_CLOCK_REALTIME: 204 break; 205 default: 206 return EINVAL; 207 } 208 209 error = copyin(SCARG(uap, tp), <s, sizeof lts); 210 if (error != 0) 211 return error; 212 213 linux_to_native_timespec(&ts, <s); 214 215 return settime(l->l_proc, &ts); 216 } 217 218 int 219 linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval) 220 { 221 /* { 222 syscallarg(clockid_t) which; 223 syscallarg(struct linux_timespec *)tp; 224 } */ 225 struct timespec ts; 226 struct linux_timespec lts; 227 int error; 228 clockid_t nwhich = 0; /* XXX: GCC */ 229 230 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 231 if (error != 0 || SCARG(uap, tp) == NULL) 232 return error; 233 234 ts.tv_sec = 0; 235 ts.tv_nsec = 1000000000 / tc_getfrequency(); 236 native_to_linux_timespec(<s, &ts); 237 return copyout(<s, SCARG(uap, tp), sizeof lts); 238 } 239 240 int 241 linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval) 242 { 243 /* { 244 syscallarg(clockid_t) which; 245 syscallarg(int) flags; 246 syscallarg(struct linux_timespec) *rqtp; 247 syscallarg(struct linux_timespec) *rmtp; 248 } */ 249 struct linux_timespec lrqts, lrmts; 250 struct timespec rqts, rmts; 251 int error, error1; 252 253 if (SCARG(uap, flags) != 0) 254 return EINVAL; /* XXX deal with TIMER_ABSTIME */ 255 256 if (SCARG(uap, which) != LINUX_CLOCK_REALTIME) 257 return EINVAL; 258 259 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); 260 if (error != 0) 261 return error; 262 263 linux_to_native_timespec(&rqts, &lrqts); 264 265 error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : 0); 266 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 267 return error; 268 269 native_to_linux_timespec(&lrmts, &rmts); 270 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); 271 return error1 ? error1 : error; 272 } 273