| 1 | /* $NetBSD: linux_time.c,v 1.37 2014/01/13 10:33:03 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 1.37 2014/01/13 10:33:03 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 | /* |
| 60 | * Linux keeps track of a system timezone in the kernel. It is readen |
| 61 | * by gettimeofday and set by settimeofday. This emulates this behavior |
| 62 | * See linux/kernel/time.c |
| 63 | */ |
| 64 | struct timezone linux_sys_tz; |
| 65 | |
| 66 | int |
| 67 | linux_sys_gettimeofday(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval) |
| 68 | { |
| 69 | /* { |
| 70 | syscallarg(struct timeval50 *) tz; |
| 71 | syscallarg(struct timezone *) tzp; |
| 72 | } */ |
| 73 | int error = 0; |
| 74 | |
| 75 | if (SCARG(uap, tp)) { |
| 76 | error = compat_50_sys_gettimeofday(l, (const void *)uap, retval); |
| 77 | if (error) |
| 78 | return (error); |
| 79 | } |
| 80 | |
| 81 | if (SCARG(uap, tzp)) { |
| 82 | error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); |
| 83 | if (error) |
| 84 | return (error); |
| 85 | } |
| 86 | |
| 87 | return (0); |
| 88 | } |
| 89 | |
| 90 | int |
| 91 | linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval) |
| 92 | { |
| 93 | /* { |
| 94 | syscallarg(struct timeval50 *) tp; |
| 95 | syscallarg(struct timezone *) tzp; |
| 96 | } */ |
| 97 | int error = 0; |
| 98 | |
| 99 | if (SCARG(uap, tp)) { |
| 100 | error = compat_50_sys_settimeofday(l, (const void *)uap, retval); |
| 101 | if (error) |
| 102 | return (error); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * If user is not the superuser, we returned |
| 107 | * after the sys_settimeofday() call. |
| 108 | */ |
| 109 | if (SCARG(uap, tzp)) { |
| 110 | error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); |
| 111 | if (error) |
| 112 | return (error); |
| 113 | } |
| 114 | |
| 115 | return (0); |
| 116 | } |
| 117 | |
| 118 | void |
| 119 | native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) |
| 120 | { |
| 121 | ltp->tv_sec = ntp->tv_sec; |
| 122 | ltp->tv_nsec = ntp->tv_nsec; |
| 123 | } |
| 124 | |
| 125 | void |
| 126 | linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) |
| 127 | { |
| 128 | ntp->tv_sec = ltp->tv_sec; |
| 129 | ntp->tv_nsec = ltp->tv_nsec; |
| 130 | } |
| 131 | |
| 132 | int |
| 133 | linux_sys_nanosleep(struct lwp *l, const struct linux_sys_nanosleep_args *uap, |
| 134 | register_t *retval) |
| 135 | { |
| 136 | /* { |
| 137 | syscallarg(struct linux_timespec *) rqtp; |
| 138 | syscallarg(struct linux_timespec *) rmtp; |
| 139 | } */ |
| 140 | struct timespec rqts, rmts; |
| 141 | struct linux_timespec lrqts, lrmts; |
| 142 | int error, error1; |
| 143 | |
| 144 | error = copyin(SCARG(uap, rqtp), &lrqts, sizeof(lrqts)); |
| 145 | if (error != 0) |
| 146 | return error; |
| 147 | linux_to_native_timespec(&rqts, &lrqts); |
| 148 | |
| 149 | error = nanosleep1(l, CLOCK_MONOTONIC, 0, &rqts, |
| 150 | SCARG(uap, rmtp) ? &rmts : NULL); |
| 151 | if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) |
| 152 | return error; |
| 153 | |
| 154 | native_to_linux_timespec(&lrmts, &rmts); |
| 155 | error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof(lrmts)); |
| 156 | return error1 ? error1 : error; |
| 157 | } |
| 158 | |
| 159 | int |
| 160 | linux_to_native_clockid(clockid_t *n, clockid_t l) |
| 161 | { |
| 162 | switch (l) { |
| 163 | case LINUX_CLOCK_REALTIME: |
| 164 | *n = CLOCK_REALTIME; |
| 165 | break; |
| 166 | case LINUX_CLOCK_MONOTONIC: |
| 167 | *n = CLOCK_MONOTONIC; |
| 168 | break; |
| 169 | case LINUX_CLOCK_PROCESS_CPUTIME_ID: |
| 170 | case LINUX_CLOCK_THREAD_CPUTIME_ID: |
| 171 | case LINUX_CLOCK_REALTIME_HR: |
| 172 | case LINUX_CLOCK_MONOTONIC_HR: |
| 173 | default: |
| 174 | return EINVAL; |
| 175 | } |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | int |
| 181 | linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval) |
| 182 | { |
| 183 | /* { |
| 184 | syscallarg(clockid_t) which; |
| 185 | syscallarg(struct linux_timespec *)tp; |
| 186 | } */ |
| 187 | int error; |
| 188 | clockid_t id; |
| 189 | struct timespec ts; |
| 190 | struct linux_timespec lts; |
| 191 | |
| 192 | error = linux_to_native_clockid(&id, SCARG(uap, which)); |
| 193 | if (error != 0) |
| 194 | return error; |
| 195 | |
| 196 | error = clock_gettime1(id, &ts); |
| 197 | if (error != 0) |
| 198 | return error; |
| 199 | |
| 200 | native_to_linux_timespec(<s, &ts); |
| 201 | return copyout(<s, SCARG(uap, tp), sizeof lts); |
| 202 | } |
| 203 | |
| 204 | int |
| 205 | linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval) |
| 206 | { |
| 207 | /* { |
| 208 | syscallarg(clockid_t) which; |
| 209 | syscallarg(struct linux_timespec *)tp; |
| 210 | } */ |
| 211 | struct timespec ts; |
| 212 | struct linux_timespec lts; |
| 213 | clockid_t id; |
| 214 | int error; |
| 215 | |
| 216 | error = linux_to_native_clockid(&id, SCARG(uap, which)); |
| 217 | if (error != 0) |
| 218 | return error; |
| 219 | |
| 220 | error = copyin(SCARG(uap, tp), <s, sizeof lts); |
| 221 | if (error != 0) |
| 222 | return error; |
| 223 | |
| 224 | linux_to_native_timespec(&ts, <s); |
| 225 | |
| 226 | return clock_settime1(l->l_proc, id, &ts, true); |
| 227 | } |
| 228 | |
| 229 | int |
| 230 | linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval) |
| 231 | { |
| 232 | /* { |
| 233 | syscallarg(clockid_t) which; |
| 234 | syscallarg(struct linux_timespec *)tp; |
| 235 | } */ |
| 236 | struct timespec ts; |
| 237 | struct linux_timespec lts; |
| 238 | int error; |
| 239 | clockid_t nwhich = 0; /* XXX: GCC */ |
| 240 | |
| 241 | error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); |
| 242 | if (error != 0 || SCARG(uap, tp) == NULL) |
| 243 | return error; |
| 244 | |
| 245 | error = clock_getres1(nwhich, &ts); |
| 246 | if (error != 0) |
| 247 | return error; |
| 248 | |
| 249 | native_to_linux_timespec(<s, &ts); |
| 250 | return copyout(<s, SCARG(uap, tp), sizeof lts); |
| 251 | } |
| 252 | |
| 253 | int |
| 254 | linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval) |
| 255 | { |
| 256 | /* { |
| 257 | syscallarg(clockid_t) which; |
| 258 | syscallarg(int) flags; |
| 259 | syscallarg(struct linux_timespec) *rqtp; |
| 260 | syscallarg(struct linux_timespec) *rmtp; |
| 261 | } */ |
| 262 | struct linux_timespec lrqts, lrmts; |
| 263 | struct timespec rqts, rmts; |
| 264 | int error, error1, flags; |
| 265 | clockid_t nwhich; |
| 266 | |
| 267 | flags = SCARG(uap, flags) != 0 ? TIMER_ABSTIME : 0; |
| 268 | |
| 269 | error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); |
| 270 | if (error != 0) |
| 271 | return error; |
| 272 | |
| 273 | error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); |
| 274 | if (error != 0) |
| 275 | return error; |
| 276 | |
| 277 | linux_to_native_timespec(&rqts, &lrqts); |
| 278 | |
| 279 | error = nanosleep1(l, nwhich, flags, &rqts, |
| 280 | SCARG(uap, rmtp) ? &rmts : NULL); |
| 281 | if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) |
| 282 | return error; |
| 283 | |
| 284 | native_to_linux_timespec(&lrmts, &rmts); |
| 285 | error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); |
| 286 | return error1 ? error1 : error; |
| 287 | } |
| 288 | |