1 /* $NetBSD: linux_time.c,v 1.36 2012/10/02 01:44:28 christos 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 1.36 2012/10/02 01:44:28 christos 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/systm.h> 43 #include <sys/sched.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 /* 60 * This is not implemented for alpha yet 61 */ 62 #if defined (__i386__) || defined (__m68k__) || \ 63 defined (__powerpc__) || defined (__mips__) || \ 64 defined(__arm__) || defined(__amd64__) 65 66 /* 67 * Linux keeps track of a system timezone in the kernel. It is readen 68 * by gettimeofday and set by settimeofday. This emulates this behavior 69 * See linux/kernel/time.c 70 */ 71 struct timezone linux_sys_tz; 72 73 int 74 linux_sys_gettimeofday(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval) 75 { 76 /* { 77 syscallarg(struct timeval50 *) tz; 78 syscallarg(struct timezone *) tzp; 79 } */ 80 int error = 0; 81 82 if (SCARG(uap, tp)) { 83 error = compat_50_sys_gettimeofday(l, (const void *)uap, retval); 84 if (error) 85 return (error); 86 } 87 88 if (SCARG(uap, tzp)) { 89 error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); 90 if (error) 91 return (error); 92 } 93 94 return (0); 95 } 96 97 int 98 linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval) 99 { 100 /* { 101 syscallarg(struct timeval50 *) tp; 102 syscallarg(struct timezone *) tzp; 103 } */ 104 int error = 0; 105 106 if (SCARG(uap, tp)) { 107 error = compat_50_sys_settimeofday(l, (const void *)uap, retval); 108 if (error) 109 return (error); 110 } 111 112 /* 113 * If user is not the superuser, we returned 114 * after the sys_settimeofday() call. 115 */ 116 if (SCARG(uap, tzp)) { 117 error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); 118 if (error) 119 return (error); 120 } 121 122 return (0); 123 } 124 125 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 126 127 void 128 native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) 129 { 130 ltp->tv_sec = ntp->tv_sec; 131 ltp->tv_nsec = ntp->tv_nsec; 132 } 133 134 void 135 linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) 136 { 137 ntp->tv_sec = ltp->tv_sec; 138 ntp->tv_nsec = ltp->tv_nsec; 139 } 140 141 int 142 linux_sys_nanosleep(struct lwp *l, const struct linux_sys_nanosleep_args *uap, 143 register_t *retval) 144 { 145 /* { 146 syscallarg(struct linux_timespec *) rqtp; 147 syscallarg(struct linux_timespec *) rmtp; 148 } */ 149 struct timespec rqts, rmts; 150 struct linux_timespec lrqts, lrmts; 151 int error, error1; 152 153 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof(lrqts)); 154 if (error != 0) 155 return error; 156 linux_to_native_timespec(&rqts, &lrqts); 157 158 error = nanosleep1(l, CLOCK_MONOTONIC, 0, &rqts, 159 SCARG(uap, rmtp) ? &rmts : NULL); 160 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 161 return error; 162 163 native_to_linux_timespec(&lrmts, &rmts); 164 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof(lrmts)); 165 return error1 ? error1 : error; 166 } 167 168 int 169 linux_to_native_clockid(clockid_t *n, clockid_t l) 170 { 171 switch (l) { 172 case LINUX_CLOCK_REALTIME: 173 *n = CLOCK_REALTIME; 174 break; 175 case LINUX_CLOCK_MONOTONIC: 176 *n = CLOCK_MONOTONIC; 177 break; 178 case LINUX_CLOCK_PROCESS_CPUTIME_ID: 179 case LINUX_CLOCK_THREAD_CPUTIME_ID: 180 case LINUX_CLOCK_REALTIME_HR: 181 case LINUX_CLOCK_MONOTONIC_HR: 182 default: 183 return EINVAL; 184 } 185 186 return 0; 187 } 188 189 int 190 linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval) 191 { 192 /* { 193 syscallarg(clockid_t) which; 194 syscallarg(struct linux_timespec *)tp; 195 } */ 196 int error; 197 clockid_t id; 198 struct timespec ts; 199 struct linux_timespec lts; 200 201 error = linux_to_native_clockid(&id, SCARG(uap, which)); 202 if (error != 0) 203 return error; 204 205 error = clock_gettime1(id, &ts); 206 if (error != 0) 207 return error; 208 209 native_to_linux_timespec(<s, &ts); 210 return copyout(<s, SCARG(uap, tp), sizeof lts); 211 } 212 213 int 214 linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval) 215 { 216 /* { 217 syscallarg(clockid_t) which; 218 syscallarg(struct linux_timespec *)tp; 219 } */ 220 struct timespec ts; 221 struct linux_timespec lts; 222 clockid_t id; 223 int error; 224 225 error = linux_to_native_clockid(&id, SCARG(uap, which)); 226 if (error != 0) 227 return error; 228 229 error = copyin(SCARG(uap, tp), <s, sizeof lts); 230 if (error != 0) 231 return error; 232 233 linux_to_native_timespec(&ts, <s); 234 235 return clock_settime1(l->l_proc, id, &ts, true); 236 } 237 238 int 239 linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval) 240 { 241 /* { 242 syscallarg(clockid_t) which; 243 syscallarg(struct linux_timespec *)tp; 244 } */ 245 struct timespec ts; 246 struct linux_timespec lts; 247 int error; 248 clockid_t nwhich = 0; /* XXX: GCC */ 249 250 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 251 if (error != 0 || SCARG(uap, tp) == NULL) 252 return error; 253 254 error = clock_getres1(nwhich, &ts); 255 if (error != 0) 256 return error; 257 258 native_to_linux_timespec(<s, &ts); 259 return copyout(<s, SCARG(uap, tp), sizeof lts); 260 } 261 262 int 263 linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval) 264 { 265 /* { 266 syscallarg(clockid_t) which; 267 syscallarg(int) flags; 268 syscallarg(struct linux_timespec) *rqtp; 269 syscallarg(struct linux_timespec) *rmtp; 270 } */ 271 struct linux_timespec lrqts, lrmts; 272 struct timespec rqts, rmts; 273 int error, error1, flags; 274 clockid_t nwhich; 275 276 flags = SCARG(uap, flags) != 0 ? TIMER_ABSTIME : 0; 277 278 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 279 if (error != 0) 280 return error; 281 282 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); 283 if (error != 0) 284 return error; 285 286 linux_to_native_timespec(&rqts, &lrqts); 287 288 error = nanosleep1(l, nwhich, flags, &rqts, 289 SCARG(uap, rmtp) ? &rmts : NULL); 290 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 291 return error; 292 293 native_to_linux_timespec(&lrmts, &rmts); 294 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); 295 return error1 ? error1 : error; 296 } 297