1 /* $NetBSD: linux_time.c,v 1.34 2010/07/12 12:01:53 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 * 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 1.34 2010/07/12 12:01:53 njoly 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 void native_to_linux_timespec(struct linux_timespec *, struct timespec *); 60 void linux_to_native_timespec(struct timespec *, struct linux_timespec *); 61 /* 62 * This is not implemented for alpha yet 63 */ 64 #if defined (__i386__) || defined (__m68k__) || \ 65 defined (__powerpc__) || defined (__mips__) || \ 66 defined(__arm__) || defined(__amd64__) 67 68 /* 69 * Linux keeps track of a system timezone in the kernel. It is readen 70 * by gettimeofday and set by settimeofday. This emulates this behavior 71 * See linux/kernel/time.c 72 */ 73 struct timezone linux_sys_tz; 74 75 int 76 linux_sys_gettimeofday(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval) 77 { 78 /* { 79 syscallarg(struct timeval50 *) tz; 80 syscallarg(struct timezone *) tzp; 81 } */ 82 int error = 0; 83 84 if (SCARG(uap, tp)) { 85 error = compat_50_sys_gettimeofday(l, (const void *)uap, retval); 86 if (error) 87 return (error); 88 } 89 90 if (SCARG(uap, tzp)) { 91 error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); 92 if (error) 93 return (error); 94 } 95 96 return (0); 97 } 98 99 int 100 linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval) 101 { 102 /* { 103 syscallarg(struct timeval50 *) tp; 104 syscallarg(struct timezone *) tzp; 105 } */ 106 int error = 0; 107 108 if (SCARG(uap, tp)) { 109 error = compat_50_sys_settimeofday(l, (const void *)uap, retval); 110 if (error) 111 return (error); 112 } 113 114 /* 115 * If user is not the superuser, we returned 116 * after the sys_settimeofday() call. 117 */ 118 if (SCARG(uap, tzp)) { 119 error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); 120 if (error) 121 return (error); 122 } 123 124 return (0); 125 } 126 127 #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */ 128 129 void 130 native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) 131 { 132 ltp->tv_sec = ntp->tv_sec; 133 ltp->tv_nsec = ntp->tv_nsec; 134 } 135 136 void 137 linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) 138 { 139 ntp->tv_sec = ltp->tv_sec; 140 ntp->tv_nsec = ltp->tv_nsec; 141 } 142 143 int 144 linux_sys_nanosleep(struct lwp *l, const struct linux_sys_nanosleep_args *uap, 145 register_t *retval) 146 { 147 /* { 148 syscallarg(struct linux_timespec *) rqtp; 149 syscallarg(struct linux_timespec *) rmtp; 150 } */ 151 struct timespec rqts, rmts; 152 struct linux_timespec lrqts, lrmts; 153 int error, error1; 154 155 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof(lrqts)); 156 if (error != 0) 157 return error; 158 linux_to_native_timespec(&rqts, &lrqts); 159 160 error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : NULL); 161 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 162 return error; 163 164 native_to_linux_timespec(&lrmts, &rmts); 165 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof(lrmts)); 166 return error1 ? error1 : error; 167 } 168 169 int 170 linux_to_native_clockid(clockid_t *n, clockid_t l) 171 { 172 switch (l) { 173 case LINUX_CLOCK_REALTIME: 174 *n = CLOCK_REALTIME; 175 break; 176 case LINUX_CLOCK_MONOTONIC: 177 *n = CLOCK_MONOTONIC; 178 break; 179 case LINUX_CLOCK_PROCESS_CPUTIME_ID: 180 case LINUX_CLOCK_THREAD_CPUTIME_ID: 181 case LINUX_CLOCK_REALTIME_HR: 182 case LINUX_CLOCK_MONOTONIC_HR: 183 default: 184 return EINVAL; 185 } 186 187 return 0; 188 } 189 190 int 191 linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval) 192 { 193 /* { 194 syscallarg(clockid_t) which; 195 syscallarg(struct linux_timespec *)tp; 196 } */ 197 int error; 198 clockid_t id; 199 struct timespec ts; 200 struct linux_timespec lts; 201 202 error = linux_to_native_clockid(&id, SCARG(uap, which)); 203 if (error != 0) 204 return error; 205 206 error = clock_gettime1(id, &ts); 207 if (error != 0) 208 return error; 209 210 native_to_linux_timespec(<s, &ts); 211 return copyout(<s, SCARG(uap, tp), sizeof lts); 212 } 213 214 int 215 linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval) 216 { 217 /* { 218 syscallarg(clockid_t) which; 219 syscallarg(struct linux_timespec *)tp; 220 } */ 221 struct timespec ts; 222 struct linux_timespec lts; 223 clockid_t id; 224 int error; 225 226 error = linux_to_native_clockid(&id, SCARG(uap, which)); 227 if (error != 0) 228 return error; 229 230 error = copyin(SCARG(uap, tp), <s, sizeof lts); 231 if (error != 0) 232 return error; 233 234 linux_to_native_timespec(&ts, <s); 235 236 return clock_settime1(l->l_proc, id, &ts, true); 237 } 238 239 int 240 linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval) 241 { 242 /* { 243 syscallarg(clockid_t) which; 244 syscallarg(struct linux_timespec *)tp; 245 } */ 246 struct timespec ts; 247 struct linux_timespec lts; 248 int error; 249 clockid_t nwhich = 0; /* XXX: GCC */ 250 251 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 252 if (error != 0 || SCARG(uap, tp) == NULL) 253 return error; 254 255 error = clock_getres1(nwhich, &ts); 256 if (error != 0) 257 return error; 258 259 native_to_linux_timespec(<s, &ts); 260 return copyout(<s, SCARG(uap, tp), sizeof lts); 261 } 262 263 int 264 linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval) 265 { 266 /* { 267 syscallarg(clockid_t) which; 268 syscallarg(int) flags; 269 syscallarg(struct linux_timespec) *rqtp; 270 syscallarg(struct linux_timespec) *rmtp; 271 } */ 272 struct linux_timespec lrqts, lrmts; 273 struct timespec rqts, rmts; 274 int error, error1; 275 clockid_t nwhich; 276 277 if (SCARG(uap, flags) != 0) 278 return EINVAL; /* XXX deal with TIMER_ABSTIME */ 279 280 error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); 281 if (error != 0) 282 return error; 283 284 error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); 285 if (error != 0) 286 return error; 287 288 linux_to_native_timespec(&rqts, &lrqts); 289 290 error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : NULL); 291 if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) 292 return error; 293 294 native_to_linux_timespec(&lrmts, &rmts); 295 error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); 296 return error1 ? error1 : error; 297 } 298