1 /* $NetBSD: linux_time.c,v 1.24 2008/04/28 20:23:44 martin 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 1.24 2008/04/28 20:23:44 martin 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/syscallargs.h> 45 #include <sys/lwp.h> 46 #include <sys/proc.h> 47 48 #include <compat/linux/common/linux_types.h> 49 #include <compat/linux/common/linux_signal.h> 50 #include <compat/linux/common/linux_machdep.h> 51 #include <compat/linux/common/linux_sched.h> 52 #include <compat/linux/common/linux_ipc.h> 53 #include <compat/linux/common/linux_sem.h> 54 55 #include <compat/linux/linux_syscallargs.h> 56 57 #include <compat/common/compat_util.h> 58 59 static void native_to_linux_timespec(struct linux_timespec *, 60 struct timespec *); 61 static void linux_to_native_timespec(struct timespec *, 62 struct linux_timespec *); 63 /* 64 * This is not implemented for alpha yet 65 */ 66 #if defined (__i386__) || defined (__m68k__) || \ 67 defined (__powerpc__) || defined (__mips__) || \ 68 defined(__arm__) || defined(__amd64__) 69 70 /* 71 * Linux keeps track of a system timezone in the kernel. It is readen 72 * by gettimeofday and set by settimeofday. This emulates this behavior 73 * See linux/kernel/time.c 74 */ 75 struct timezone linux_sys_tz; 76 77 int 78 linux_sys_gettimeofday(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval) 79 { 80 /* { 81 syscallarg(struct timeval *) tz; 82 syscallarg(struct timezone *) tzp; 83 } */ 84 int error = 0; 85 86 if (SCARG(uap, tp)) { 87 error = sys_gettimeofday(l, (const void *)uap, retval); 88 if (error) 89 return (error); 90 } 91 92 if (SCARG(uap, tzp)) { 93 error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); 94 if (error) 95 return (error); 96 } 97 98 return (0); 99 } 100 101 int 102 linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval) 103 { 104 /* { 105 syscallarg(struct timeval *) tp; 106 syscallarg(struct timezone *) tzp; 107 } */ 108 int error = 0; 109 110 if (SCARG(uap, tp)) { 111 error = sys_settimeofday(l, (const void *)uap, retval); 112 if (error) 113 return (error); 114 } 115 116 /* 117 * If user is not the superuser, we returned 118 * after the sys_settimeofday() call. 119 */ 120 if (SCARG(uap, tzp)) { 121 error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); 122 if (error) 123 return (error); 124 } 125 126 return (0); 127 } 128 129 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 130 131 static void 132 native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) 133 { 134 ltp->tv_sec = ntp->tv_sec; 135 ltp->tv_nsec = ntp->tv_nsec; 136 } 137 138 static void 139 linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) 140 { 141 ntp->tv_sec = ltp->tv_sec; 142 ntp->tv_nsec = ltp->tv_nsec; 143 } 144 145 int 146 linux_to_native_clockid(clockid_t *n, clockid_t l) 147 { 148 switch (l) { 149 case LINUX_CLOCK_REALTIME: 150 *n = CLOCK_REALTIME; 151 break; 152 case LINUX_CLOCK_MONOTONIC: 153 *n = CLOCK_MONOTONIC; 154 break; 155 case LINUX_CLOCK_PROCESS_CPUTIME_ID: 156 case LINUX_CLOCK_THREAD_CPUTIME_ID: 157 case LINUX_CLOCK_REALTIME_HR: 158 case LINUX_CLOCK_MONOTONIC_HR: 159 return EINVAL; 160 } 161 162 return 0; 163 } 164 165 int 166 linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval) 167 { 168 /* { 169 syscallarg(clockid_t) which; 170 syscallarg(struct linux_timespec *)tp; 171 } */ 172 struct timespec ts; 173 struct linux_timespec lts; 174 175 switch (SCARG(uap, which)) { 176 case LINUX_CLOCK_REALTIME: 177 nanotime(&ts); 178 break; 179 case LINUX_CLOCK_MONOTONIC: 180 nanouptime(&ts); 181 break; 182 default: 183 return EINVAL; 184 } 185 186 native_to_linux_timespec(<s, &ts); 187 return copyout(<s, SCARG(uap, tp), sizeof lts); 188 } 189 190 int 191 linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval) 192 { 193 /* { 194 syscallarg(clockid_t) which; 195 syscallarg(struct linux_timespec *)tp; 196 } */ 197 struct timespec ts; 198 struct linux_timespec lts; 199 int error; 200 201 switch (SCARG(uap, which)) { 202 case LINUX_CLOCK_REALTIME: 203 break; 204 default: 205 return EINVAL; 206 } 207 208 error = copyin(SCARG(uap, tp), <s, sizeof lts); 209 if (error != 0) 210 return error; 211 212 linux_to_native_timespec(&ts, <s); 213 214 return settime(l->l_proc, &ts); 215 } 216 217 int 218 linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval) 219 { 220 /* { 221 syscallarg(clockid_t) which; 222 syscallarg(struct linux_timespec *)tp; 223 } */ 224 struct timespec ts; 225 struct linux_timespec lts; 226 int error; 227 clockid_t nwhich = 0; /* XXX: GCC */ 228 229 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 230 if (error != 0 || SCARG(uap, tp) == NULL) 231 return error; 232 233 ts.tv_sec = 0; 234 ts.tv_nsec = 1000000000 / tc_getfrequency(); 235 native_to_linux_timespec(<s, &ts); 236 return copyout(<s, SCARG(uap, tp), sizeof lts); 237 } 238 239 int 240 linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval) 241 { 242 /* { 243 syscallarg(clockid_t) which; 244 syscallarg(int) flags; 245 syscallarg(struct linux_timespec) *rqtp; 246 syscallarg(struct linux_timespec) *rmtp; 247 } */ 248 struct linux_timespec lrqts, lrmts; 249 struct timespec rqts, rmts; 250 int error, error1; 251 252 if (SCARG(uap, flags) != 0) 253 return EINVAL; /* XXX deal with TIMER_ABSTIME */ 254 255 if (SCARG(uap, which) != LINUX_CLOCK_REALTIME) 256 return EINVAL; 257 258 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); 259 if (error != 0) 260 return error; 261 262 linux_to_native_timespec(&rqts, &lrqts); 263 264 error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : 0); 265 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 266 return error; 267 268 native_to_linux_timespec(&lrmts, &rmts); 269 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); 270 return error1 ? error1 : error; 271 } 272